CN203532801U - Triple-eccentric hard-seal butterfly valve - Google Patents
Triple-eccentric hard-seal butterfly valve Download PDFInfo
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- CN203532801U CN203532801U CN201320627892.9U CN201320627892U CN203532801U CN 203532801 U CN203532801 U CN 203532801U CN 201320627892 U CN201320627892 U CN 201320627892U CN 203532801 U CN203532801 U CN 203532801U
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- valve rod
- butterfly plate
- valve
- butterfly
- seal ring
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- 239000007769 metal material Substances 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 238000007789 sealing Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000010612 desalination reaction Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
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Abstract
The utility model discloses a triple-eccentric hard-seal butterfly valve. The triple-eccentric hard-seal butterfly valve comprises a valve body, valve rods, a butterfly plate and an actuating mechanism used for driving the valve rods to rotate. The valve rods comprise the upper valve rod and the lower valve rod, wherein the upper valve rod and the lower valve rod are of a split mode and are coaxial with each other, the upper valve rod and the lower valve rod penetrate through an upper shaft hole and a lower shaft hole of the butterfly plate respectively, the upper valve rod is matched with the actuating mechanism in a linkage mode, the lower valve rod is matched with the valve body in a rotating mode, the upper valve rod and the butterfly plate are fixed in a key joint mode, and the lower valve rod and the butterfly plate are fixed in a pin joint mode. According to the triple-eccentric hard-seal butterfly valve, the upper valve rod and the butterfly plate are fixed in the key joint mode, and therefore large opening torsion can be transmitted stably and reliably by the upper valve rod; since pin hole machining is omitted, the strength of the upper valve rod can be enhanced, and the leakproof effect and the service life of the butterfly valve are guaranteed; besides, the triple-eccentric hard-seal butterfly valve is convenient to replace; since the lower valve rod does not need to transmit the opening torsion, the lower valve rod and the butterfly plate are fixed in the pin joint mode, and the lower valve rod has the advantages of being accurate in positioning, low in manufacturing cost and convenient to install.
Description
Technical field
The utility model relates to a kind of three eccentric butterfly valve, particularly a kind of three eccentric hard sealed flygates.
Background technique
Butterfly valve refers to that closure member is the butterfly plate of disc-shape, and butterfly plate rotates to reach a kind of valve of opening or closing around the axis of valve rod, and on pipeline, main rising cut off and throttling action.Along with the development of industrial technology, common butterfly valve can not meet industrial demand, has successively experienced the differentiation of concentric, single bias, two bias and three bias for meeting various working condition requirements, butterfly valve.Butterfly plate center is departed from the valve rod axle center of three eccentric butterfly valve simultaneously and body center is two bias, and sealing pair is that tilted conical surface is the 3rd bias, and its unique eccentric structure makes it have the more tighter sealability in pass, so the sealability of this type of valve is reliable.Three eccentric butterfly valve is mainly used in the fields such as petrochemical industry, desalination of sea water, medical apparatus, metallurgy, electric power, nuclear energy.Three eccentric butterfly valve structure is quite ripe both at home and abroad, to requiring the three eccentric butterfly valve product that is applied to the complex working conditions such as High Temperature High Pressure to get more and more, to the leakage class of valve, require also more and more higher, therefore valve components machining accuracy and other external factor affect the performance of valve directly or indirectly, on this basis the optimization of valve mechanism more can improve valve performance, reduce production costs.
The both sides of the sealing pair of hard seal butterfly valve are all metallic material or other harder material.In three eccentric butterfly valve manufactures and designs, the intensity of seal ring has directly limited the maximum permissible pressure of valve, the cooperate degree of valve valve seat and seal ring directly affects valve leak grade, and the linkage structure of valve rod and butterfly plate has affected valve processing and assembling and the safety rate of opening/shutting valve in actual conditions.Three eccentric hard sealed flygates that have adopt double rod type structure, refer to that valve rod split is arranged to the three eccentric butterfly valve of upper valve rod and lower valve rod, be generally used for environment under low pressure, its upper valve rod, lower valve rod pass respectively upper shaft hole, the lower shaft hole of butterfly plate, upper valve rod and driving mechanism are linked, lower valve rod coordinates with valve body rotation, upper valve rod, lower valve rod all by pin Placement realize with butterfly plate between be fixedly connected with.But there is following defect in this structure: the first, the load that pin Placement is transmitted is little, easily causes pin fracture, makes the transmission failure between butterfly plate and valve rod; The second, owing at least two groups of pin-and-holes need being set on butterfly plate and valve rod, can reduce like this intensity of valve rod, the working life of impairment butterfly valve; The 3rd, the structure that pin connects easily causes pin to come off so that produces leakage, affects the using effect of valve leak grade and butterfly valve.
Therefore, be necessary existing three eccentric hard sealed flygates to improve, its upper valve rod, lower valve rod not all by pin Placement realize with butterfly plate between be fixedly connected with, strengthen valve rod intensity guaranteeing to transmit on the basis of larger load, to guarantee anti-leak result and the working life of butterfly valve.
Model utility content
In view of this, the purpose of this utility model is to provide a kind of three eccentric hard sealed flygates, its upper valve rod, lower valve rod not all by pin Placement realize with butterfly plate between be fixedly connected with, on the basis that guarantees the larger load of transmission, strengthen valve rod intensity, to guarantee anti-leak result and the working life of butterfly valve.
Three eccentric hard sealed flygates of the present utility model, comprise valve body, valve rod, butterfly plate and the actuator for driving described valve rod to rotate, described valve rod comprises split and coaxial upper valve rod and the lower valve rod arranging, described upper valve rod, lower valve rod pass respectively upper shaft hole, the lower shaft hole of described butterfly plate, described upper valve rod and described actuator are linked, described lower valve rod coordinates with described valve body rotation, between described upper valve rod and described butterfly plate, by key Placement, fix, between described lower valve rod and described butterfly plate, by pin Placement, fix.
Further, described upper valve rod is fixedly connected with described butterfly plate through flat key, and described lower valve rod is fixedly connected with described butterfly plate through straight pin.
Further, the bottom of described upper shaft hole is provided with for limiting described upper valve rod to the limiting stopper of bottom offset, between described limiting stopper and described upper valve rod, by lock screw, is fixedly connected with.
Further, also comprise valve seat and seal ring, described seal ring is made by metallic material, described valve seat and described valve body are assembly parts, described valve seat is conical surface shape ringwise, the small-caliber end of described valve seat is near valve channel port, and described seal ring is fixed on described butterfly plate and for realizing being tightly connected of described valve seat and butterfly plate by trim ring and socket head screw.
Further, described butterfly plate is provided with upper shoulder and lower shoulder towards the edge of described valve channel port one side, described ring set shoulder on described, described trim ring is sleeved on described lower shoulder and contacts with described seal ring formation face, and described socket head screw is fixed on described trim ring and seal ring the outer edge of described butterfly plate by the fixed hole on described trim ring and described butterfly plate.
Further, the width of described upper shoulder is the 1/4-1/3 of described butterfly plate width.
The beneficial effects of the utility model: three eccentric hard sealed flygates of the present utility model, between upper valve rod and butterfly plate, by key Placement, fix, can transmit stable, reliably larger unlatching torsion, owing to removing pin-and-hole processing from, can not only strengthen anti-leak result and the working life of upper valve rod intensity, assurance butterfly valve, and this structure also has installation, changes advantage easily; Lower valve rod is due to without transmit opening torsion, between itself and butterfly plate, by pin Placement, fixes, and has advantages of accurate positioning, low cost of manufacture, easy for installation; Of the present utility model rational in infrastructure, usability good, is suitable for mass production.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 is structural representation of the present utility model;
Fig. 2 is A place enlarged view in Fig. 1.
Embodiment
Fig. 1 is for being structural representation of the present utility model, Fig. 2 is A place enlarged view in Fig. 1, as shown in the figure: three eccentric hard sealed flygates of the present utility model, comprise valve body 1, valve rod, butterfly plate 3 and the actuator 4 for driving described valve rod to rotate, described valve rod comprises split setting and coaxial upper valve rod 21 and the lower valve rod 22 arranging, described upper valve rod 21, lower valve rod 22 passes respectively the upper shaft hole 31 of described butterfly plate 3, lower shaft hole 32, described upper valve rod 21 is linked with described actuator 4, described lower valve rod 22 coordinates with described valve body 1 rotation, between described upper valve rod 21 and described butterfly plate 3, by key Placement, fix, between described lower valve rod 22 and described butterfly plate 3, by pin Placement, fix, actuator 4 can be manpower handle, can be also electric power, hydraulically powered handle, by handle with sleeve, drive upper valve rod 21 to rotate, upper valve rod 21 drives butterfly plate 3 to rotate, for achieving a fixed connection, upper valve rod 21 is provided with corresponding keyway with upper shaft hole 31, and lower valve rod 22 is provided with corresponding pin-and-hole with lower shaft hole 32, between upper valve rod 21 and butterfly plate 3, by key Placement, fix, can transmit stable, reliably larger unlatching torsion, owing to removing pin-and-hole processing from, can not only strengthen the Security of upper valve rod 21 intensity, the anti-leak result that guarantees this butterfly valve and working life, raising valve, and this structure also has and changes advantage easily, key can be selected flat key or spline as required, as long as can realize the function of driving torque, lower valve rod 22 is due to without transmit opening torsion, between itself and butterfly plate 3, by pin Placement, fixes, and has advantages of accurate positioning, low cost of manufacture, easy for installation.
In the present embodiment, described upper valve rod 21 is fixedly connected with described butterfly plate 3 through flat key 51, and described lower valve rod 22 is fixedly connected with described butterfly plate 3 through straight pin 52; That flat key 51 has is simple in structure, easy accessibility, feature that centering is good, is applicable to bearing the occasion of variable load, impact; Flat key 51 and the parallel coincidence of keyway on upper valve rod 21 and upper shaft hole 31, first pack flat key 51 in the keyway of upper valve rod 21 into during assembling, then upper valve rod 21 is inserted in upper shaft holes 31; The accurate positioning of straight pin 52, relies on interference fit to be fixed in the pin-and-hole of lower valve rod 22 and lower shaft hole 32.
In the present embodiment, the bottom of described upper shaft hole 31 is provided with for limiting described upper valve rod 21 to the limiting stopper 6 of bottom offset, and described limiting stopper 6 is fixedly connected with by lock screw 61 with 21 of described upper valve rods; Limiting stopper 6 guarantees the accurate connection of flat keys 51, and by limiting stopper 6 intensity that can strengthen upper valve rod 21 that is fixedly connected with upper valve rod 21, increase the performance of its transmitting torque.
In the present embodiment, also comprise valve seat and seal ring 7, described seal ring is made by metallic material, described valve seat and described valve body 1 are assembly parts, described valve seat is conical surface shape ringwise, the small-caliber end of described valve seat is near valve channel port, and described seal ring 7 is fixed on described butterfly plate 3 and for realizing being tightly connected of described valve seat and butterfly plate 3 by trim ring 71 and socket head screw 72; Valve seat and valve body 1 are assembly parts, and the two one-body molded or valve seat is flush-mounted in valve body 1, can reduce the leakage space that linkage structure causes; Seal ring 7 adopts metallic hard material to make, and coordinating is the valve seat of metallic hard material equally, makes this butterfly valve form hard sealing structure, can adapt to the environment such as high temperature, high pressure and corrosion; Valve channel port is valve body 1 left side in Fig. 1, and valve channel is away from a side of valve rod 2; Valve seat and seal ring 7 form surface of contact and reach sealing effect, so the shape of the two is corresponding relation.
In the present embodiment, described butterfly plate 3 is provided with upper shoulder 33 and lower shoulder 34 towards the edge of described valve channel port one side, described seal ring 7 is sleeved on described upper shoulder 33, described trim ring 71 is sleeved on described lower shoulder 34 and contacts with described seal ring 7 formation faces, and described socket head screw 72 is fixed on described trim ring 7 and seal ring 71 by the fixed hole on described trim ring 7 and described butterfly plate 3 outer edge of described butterfly plate 3; Upper shoulder 33 and lower shoulder 34 are vertical riser shape; For further preventing fluid leakage, before being sleeved on shoulder 33, seal ring 7 also must be set with one deck pad; The integral width of seal ring 7 is slightly larger than the bottom width of shoulder 33, and in the process of tightening gradually socket head screw 72, trim ring 71 can produce laterally extruding to seal ring 7 and make its generation resiliently deformable, produces pretightening force, makes to connect fastening.
In the present embodiment, the width of described upper shoulder 33 is 1/3 of described butterfly plate 3 width, and the width of lower shoulder 32 is also 1/3 of butterfly plate 3 width.
Finally explanation is, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.
Claims (6)
1. an eccentric hard sealed flygate, comprise valve body (1), valve rod, butterfly plate (3) and the actuator (4) for driving described valve rod to rotate, described valve rod comprises split setting and coaxial upper valve rod (21) and the lower valve rod (22) arranging, described upper valve rod (21), lower valve rod (22) passes respectively the upper shaft hole (31) of described butterfly plate (3), lower shaft hole (32), described upper valve rod (21) is linked with described actuator (4), described lower valve rod (22) coordinates with described valve body (1) rotation, it is characterized in that: between described upper valve rod (21) and described butterfly plate (3), by key Placement, fix, between described lower valve rod (22) and described butterfly plate (3), by pin Placement, fix.
2. three eccentric hard sealed flygates according to claim 1, is characterized in that: described upper valve rod (21) is fixedly connected with described butterfly plate (3) through flat key (51), and described lower valve rod (22) is fixedly connected with described butterfly plate (3) through straight pin (52).
3. three eccentric hard sealed flygates according to claim 2, it is characterized in that: the bottom of described upper shaft hole (31) is provided with for limiting described upper valve rod (21) to the limiting stopper (6) of bottom offset, between described limiting stopper (6) and described upper valve rod (21), by lock screw (61), be fixedly connected with.
4. according to three eccentric hard sealed flygates described in any one in claims 1 to 3, it is characterized in that: also comprise valve seat and seal ring (7), described seal ring (7) is made by metallic material, described valve seat and described valve body (1) are assembly parts, described valve seat is conical surface shape ringwise, the small-caliber end of described valve seat is near valve channel port, and described seal ring (7) is fixed on described butterfly plate (3) and for realizing being tightly connected of described valve seat and butterfly plate (3) by trim ring (71) and socket head screw (72).
5. three eccentric hard sealed flygates according to claim 4, it is characterized in that: described butterfly plate (3) is provided with upper shoulder (33) and lower shoulder (34) towards the edge of described valve channel port one side, described seal ring (7) is sleeved on described upper shoulder (33), described trim ring (71) is sleeved on described lower shoulder (34) and contacts with described seal ring (7) formation face, described socket head screw (72) is fixed on described trim ring (7) and seal ring (71) outer edge of described butterfly plate (3) by the fixed hole on described trim ring (7) and described butterfly plate (3).
6. three eccentric hard sealed flygates according to claim 5, is characterized in that: the width of described upper shoulder (33) is the 1/4-1/3 of described butterfly plate (3) width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320627892.9U CN203532801U (en) | 2013-10-11 | 2013-10-11 | Triple-eccentric hard-seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320627892.9U CN203532801U (en) | 2013-10-11 | 2013-10-11 | Triple-eccentric hard-seal butterfly valve |
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| Publication Number | Publication Date |
|---|---|
| CN203532801U true CN203532801U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320627892.9U Expired - Lifetime CN203532801U (en) | 2013-10-11 | 2013-10-11 | Triple-eccentric hard-seal butterfly valve |
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| Country | Link |
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| CN (1) | CN203532801U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896121A (en) * | 2015-05-25 | 2015-09-09 | 蚌埠南自仪表有限公司 | Valve plate and valve body sealing cooperation structure of three-eccentric hard sealing butterfly valve |
-
2013
- 2013-10-11 CN CN201320627892.9U patent/CN203532801U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104896121A (en) * | 2015-05-25 | 2015-09-09 | 蚌埠南自仪表有限公司 | Valve plate and valve body sealing cooperation structure of three-eccentric hard sealing butterfly valve |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |
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| CX01 | Expiry of patent term |