CN203532802U - Triple-eccentric hard-seal butterfly valve - Google Patents
Triple-eccentric hard-seal butterfly valve Download PDFInfo
- Publication number
- CN203532802U CN203532802U CN201320630140.8U CN201320630140U CN203532802U CN 203532802 U CN203532802 U CN 203532802U CN 201320630140 U CN201320630140 U CN 201320630140U CN 203532802 U CN203532802 U CN 203532802U
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- valve rod
- valve
- flat key
- butterfly
- butterfly plate
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- 230000000694 effects Effects 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
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- 238000010612 desalination reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development 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
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material 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, a valve rod, a butterfly plate and an actuating mechanism used for driving the valve rod to rotate. A support is arranged on the reverse side of the butterfly plate. The valve rod penetrates through the support. The triple-eccentric hard-seal butterfly valve further comprises a flat key. The valve rod is provided with a key groove used for containing the flat key. The support is provided with a key hole which is communicated with the key groove and penetrates through the support. The valve rod and the flat key are respectively provided with a connecting hole I, wherein the connecting holes I are matched with each other. The valve rod, the flat key and the valve plate are connected and fixed by making a key fixing bolt penetrate through the connecting holes I. According to the triple-eccentric hard-seal butterfly valve, the valve rod and the butterfly plate are fixed in a flat key joint mode, and therefore large opening torsion can be transmitted stably and reliably by the valve rod; since pin hole machining is omitted, excessive damage to the structure of the valve rod is avoided, the strength of the valve rod can be enhanced, and the leakproof effect and the service life of the butterfly valve are guaranteed; besides, the key hole in the support is a through hole, so that the flat key joint has the advantage of being convenient to install and replace.
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 hard sealed flygates manufacture and design, 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.The valve rod of existing three eccentric hard sealed flygates is an integrated type round bar, and valve rod penetrates valve body and is fixedly connected with butterfly plate and is linked with driving mechanism.In prior art, the valve rod of three eccentric hard sealed flygates by pin Placement realize with butterfly plate between be fixedly connected with, there is following defect in this structure: the first, the load that pin Placement is transmitted is little, easily cause pin fracture, make 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 valve rod not 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 valve rod not 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.
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, the described butterfly plate back side is provided with bearing, described valve rod is located in described bearing, also comprise flat key, described valve rod is provided with for packing the keyway of described flat key into, described bearing is provided with the keyhole that is communicated with and runs through described bearing with described keyway, described valve rod is provided with flat key the attachment hole I matching, and key fixing bolt is connected and fixed described valve rod, flat key and butterfly plate by described attachment hole I.
Further, also comprise cover plate, described cover plate is fixed on described support outer and covers on described keyhole to seal described keyhole.
Further, described flat key is provided with cover plate the attachment hole II matching, and cover plate set screw is connected and fixed described bearing, flat key and cover plate by described attachment hole II.
Further, described attachment hole I, attachment hole II are located on same straight line and along the center line of described valve rod and arrange.
Further, described bearing is provided with for packing the slot cover of described cover plate into.
Further, also comprise valve seat and seal ring, described seal ring is made by hard metal, 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.
The beneficial effects of the utility model: three eccentric hard sealed flygates of the present utility model, between valve rod and butterfly plate, by flat key Placement, fix, make valve rod can stablize, transmit reliably larger unlatching torsion; Owing to removing pin-and-hole processing from, avoided the excessive destruction to stem structure, can strengthen anti-leak result and the working life of valve rod intensity, assurance butterfly valve; And the keyhole on bearing is through hole, make flat key connection also there is installation, change advantage easily; 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 be in Fig. 1 N to view;
Fig. 3 is A place enlarged view in Fig. 1.
Embodiment
Fig. 1 is structural representation of the present utility model, Fig. 2 be in Fig. 1 N to view, Fig. 3 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 2, butterfly plate 3 and the actuator 4 for driving described valve rod 2 to rotate, described butterfly plate 3 back sides are provided with bearing 31, described valve rod 2 is located in described bearing 31, also comprise flat key 5, described valve rod 2 is provided with for packing the keyway 21 of described flat key 5 into, described bearing 31 is provided with the keyhole 31a that is communicated with and runs through described bearing 31 with described keyway 21, described valve rod 2 is provided with flat key 5 the attachment hole I 21 matching, key fixing bolt 91 by described attachment hole I 21 by described valve rod 2, flat key 5 and butterfly plate 3 are connected and fixed, actuator 4 can be manpower handle, can be also electric power, hydraulically powered handle, by handle with sleeve band ovable valve stem 2, rotate, 2 of valve rods drive butterfly plate 3 to rotate, the front of butterfly plate 3 is near valve channel port, and valve channel port is valve body 1 left side in Fig. 1, and valve channel is away from a side of valve rod 2, and butterfly plate 3 back sides are the another side with its vis-a-vis, bearing 31 is a part for butterfly plate 3, comprises for valve rod 2 the bar hole of passing and the support plate being connected with butterfly plate 3, wherein, support plate can be continuous structure or discontinuous structure, and the former refers to that support plate can cover valve rod 2 completely, thereby latter refers to that support plate not exclusively covers valve rod 2 and causes outside valve rod 2 is exposed to, between valve rod 2 and butterfly plate 3, by key Placement, fix, make valve rod 2 can stablize, transmit reliably larger unlatching torsion, owing to removing pin-and-hole processing from, avoided the excessive destruction to valve rod 2 structures, can strengthen valve rod 2 intensity, the anti-leak result that guarantees this butterfly valve and working life, and the keyhole 31a on bearing 31 is through hole, make flat key connection also there is installation, change advantage easily, as for the quantity of flat key 5 and corresponding linkage structure thereof,, depending on plate structure, for the support plate of continuous structure, preferably adopt a flat key 5 to realize the conformity of transmission, for the support plate of discontinuous structure, preferably adopt two symmetrically arranged flat keys 5.
In the present embodiment, also comprise cover plate 6, described cover plate 6 is fixed on described bearing 31 outsides and covers on described keyhole 31a to seal described keyhole 31a; Bearing 31 outsides are that bearing 31 is away from a side of valve rod 2; Complete covering wall seal keyhole 31a after cover plate 6 is fixed on bearing 31, prevents that liquid from leaking from keyhole 31a, strengthens the anti-leak result of this butterfly valve.
In the present embodiment, described flat key 5 is provided with cover plate 6 the attachment hole II 52 matching, and cover plate set screw 92 is connected and fixed described bearing 31, flat key 5 and cover plate 6 by described attachment hole II 52; After having assembled, attachment hole II 52 center superpositions on flat key 5, cover plate 6, tighten cover plate set screw 92 and can realize the fixing of bearing 31, flat key 5 and cover plate 6; This linkage structure is simple and convenient, is convenient to installation and the dismounting of cover plate 6.
In the present embodiment, described attachment hole I 21, attachment hole II 52 are located on same straight line and arrange along the center line 2a of described valve rod 2; Center line 2a along valve rod 2 arranges, refers to that the axis of attachment hole I 21, attachment hole II 52 is perpendicular to center line 2a; This structure can guarantee the balance of valve rod 2 driving torques, makes the fixing more firm of flat key 5, cover plate 6 simultaneously; As for the quantity of attachment hole I 21, attachment hole II 52 and the relative position of the two,, depending on a plate structure, for the support plate of continuous structure, preferably between two attachment hole I 21 that are arranged symmetrically with, be symmetrical arranged two attachment hole II 52; For the support plate of discontinuous structure,, in every group of flat key 5 linkage structures, an attachment hole II 52 is set between the attachment hole I 21 that two are arranged symmetrically with.
In the present embodiment, described bearing 31 is provided with for packing the slot cover 31b of described cover plate 6 into; Slot cover 31b is convenient to the installation location of cover plate 6, and makes this butterfly valve structurally more coherent, attractive in appearance.
In the present embodiment, also comprise valve seat and seal ring 7, described seal ring 7 is made by hard metal, 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 93; 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 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 32 and lower shoulder 33 towards the edge of described valve channel port one side, described seal ring 7 is sleeved on described upper shoulder 32, described trim ring 71 is sleeved on described lower shoulder 33 and contacts with described seal ring 7 formation faces, and described socket head screw 93 is fixed on described trim ring 71 and seal ring 7 by the fixed hole on described trim ring 71 and described butterfly plate 3 outer edge of described butterfly plate 3; Upper shoulder 32 and lower shoulder 33 are vertical riser shape; For further preventing fluid leakage, before being sleeved on shoulder 32, 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 32, and in the process of tightening gradually socket head screw 93, trim ring 71 can produce laterally extruding to seal ring 7 and make its generation resiliently deformable, produces pretightening force, makes to connect fastening; The width of upper shoulder 32 is preferably 1/3 of butterfly plate 3 width, and the width of lower shoulder 33 is also preferably 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 (7)
1. an eccentric hard sealed flygate, comprise valve body (1), valve rod (2), butterfly plate (3) and the actuator (4) for driving described valve rod (2) to rotate, described butterfly plate (3) back side is provided with bearing (31), described valve rod (2) is located in described bearing (31), it is characterized in that: also comprise flat key (5), described valve rod (2) is provided with the keyway (21) for packing described flat key (5) into, described bearing (31) is provided with the keyhole (31a) that is communicated with and runs through described bearing (31) with described keyway (21), described valve rod (2) is provided with flat key (5) the attachment hole I (51) matching, key fixing bolt (91) by described attachment hole I (51) by described valve rod (2), flat key (5) and butterfly plate (3) are connected and fixed.
2. three eccentric hard sealed flygates according to claim 1, is characterized in that: also comprise cover plate (6), described cover plate (6) is fixed on described bearing (31) outside and covers at described keyhole (31a) upper to seal described keyhole (31a).
3. three eccentric hard sealed flygates according to claim 2, it is characterized in that: described flat key (5) is provided with cover plate (6) the attachment hole II (52) matching, and cover plate set screw (92) is connected and fixed described bearing (31), flat key (5) and cover plate (6) by described attachment hole II (52).
4. three eccentric hard sealed flygates according to claim 3, is characterized in that: described attachment hole I (51), attachment hole II (52) are located on same straight line and along the center line (2a) of described valve rod (2) and arrange.
5. three eccentric hard sealed flygates according to claim 4, is characterized in that: described bearing (31) is provided with the slot cover (31b) for packing described cover plate (6) into.
6. according to three eccentric hard sealed flygates described in any one in claim 1 to 5, it is characterized in that: also comprise valve seat and seal ring (7), described seal ring (7) is made by hard metal, 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 (93).
7. three eccentric hard sealed flygates according to claim 6, it is characterized in that: described butterfly plate (3) is provided with upper shoulder (32) and lower shoulder (33) towards the edge of described valve channel port one side, described seal ring (7) is sleeved on described upper shoulder (32), described trim ring (71) is sleeved on described lower shoulder (33) and contacts with described seal ring (7) formation face, described socket head screw (93) is fixed on described trim ring (71) and seal ring (7) outer edge of described butterfly plate (3) by the fixed hole on described trim ring (71) and described butterfly plate (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320630140.8U CN203532802U (en) | 2013-10-11 | 2013-10-11 | Triple-eccentric hard-seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320630140.8U CN203532802U (en) | 2013-10-11 | 2013-10-11 | Triple-eccentric hard-seal butterfly valve |
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| Publication Number | Publication Date |
|---|---|
| CN203532802U true CN203532802U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320630140.8U Expired - Lifetime CN203532802U (en) | 2013-10-11 | 2013-10-11 | Triple-eccentric hard-seal butterfly valve |
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| CN (1) | CN203532802U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460273A (en) * | 2020-11-24 | 2021-03-09 | 浙江尔格科技股份有限公司 | Butterfly valve, valve plate of butterfly valve and connection structure of butterfly valve plate and rotating shaft |
-
2013
- 2013-10-11 CN CN201320630140.8U patent/CN203532802U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460273A (en) * | 2020-11-24 | 2021-03-09 | 浙江尔格科技股份有限公司 | Butterfly valve, valve plate of butterfly valve and connection structure of butterfly valve plate and rotating shaft |
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| Date | Code | Title | Description |
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| 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 |