CN204533567U - Fire-proof type three eccentricity seal butterfly valve - Google Patents
Fire-proof type three eccentricity seal butterfly valve Download PDFInfo
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- CN204533567U CN204533567U CN201520096332.4U CN201520096332U CN204533567U CN 204533567 U CN204533567 U CN 204533567U CN 201520096332 U CN201520096332 U CN 201520096332U CN 204533567 U CN204533567 U CN 204533567U
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Abstract
The utility model belongs to control valve for fluids technical field, specifically a kind of fire-proof type three eccentricity seal butterfly valve, comprise valve body, in valve body cavity, valve plate is installed, the mounting hole of valve plate and the through hole of valve body are coaxially arranged, run through in the through hole of valve body and be provided with transmission shaft, mounting hole is sheathed on transmission shaft; Stuffing box place, valve body top is provided with filler assembly, filler assembly upper end is provided with Gland, hold-down grid is installed with on described Gland, and Gland is fixed on valve body upper-end surface by screw rod and locking nut, and transmission shaft upwards passes from the through hole of hold-down grid; Be disposed with metallic packing ring, nonmetal seal ring and trim ring on valve body, corresponding to the top of valve plate, be fastenedly connected by socket head screw between trim ring and valve body.Sealing butterfly valve has fire-proof function, can realize effective sealing.
Description
Technical field
The utility model belongs to control valve for fluids technical field, specifically a kind of fire-proof type three eccentricity seal butterfly valve.
Background technique
Along with economic development, industrial automatic control level in continuous raising, thus to the requirement of valve reliability in process control also in continuous raising, higher requirement be it is also proposed to the sealability of valve.In existing technology, metallic sealing butterfly valve is generally as frpf butterfly valve, its defect is that metallic sealing butterfly valve is generally not high to leakage class requirement, required torque is larger simultaneously, the wearing and tearing of sealing surface are large, life-span is short, and two way sealed effect is undesirable, cannot ensure the sealability that valve is good for a long time especially; Nonmetal seal butterfly valve is not generally suitable for worst hot case, particularly cannot effective sealing during breaking out of fire; It is high to there is cost of production in traditional three eccentric butterfly valve, to problems such as workman's matching requirements height; Therefore low, the highly versatile of cost of production, the butterfly valve that has fire-proof function, can meet higher leakage class requirement simultaneously, become active demand.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and provide a kind of structure simple, ingenious, rational fire-proof type three eccentricity seal butterfly valve, sealing butterfly valve has fire-proof function, can realize effective sealing.
Technological scheme according to the utility model provides: a kind of fire-proof type three eccentricity seal butterfly valve, it is characterized in that: comprise valve body, in valve body cavity, valve plate is installed, the mounting hole of valve plate and the through hole of valve body are coaxially arranged, run through in the through hole of valve body and be provided with transmission shaft, mounting hole is sheathed on transmission shaft; Stuffing box place, valve body top is provided with filler assembly, filler assembly upper end is provided with Gland, hold-down grid is installed with on described Gland, and hold-down grid is fixed on valve body upper-end surface by screw rod and locking nut, and transmission shaft upwards passes from the through hole of hold-down grid; Body cavity, be disposed with metallic packing ring, nonmetal seal ring and trim ring corresponding to the top of valve plate, be fastenedly connected by socket head screw between trim ring and valve body, be fixedly connected with by pin between valve plate with transmission shaft; Valve body lower end is fixed with end flange by hex head bolt, is provided with limit assembly, spacer successively from top to bottom between flange of the described end and transmission shaft lower end surface; In the through hole of valve body, corresponding to the below of filler assembly and the top of limit assembly, a lining is set respectively.
As further improvement of the utility model, described filler assembly comprises Packing seat and filler spacer.
As further improvement of the utility model, described limit assembly comprises bearing support, back-up ring, bearing.
As further improvement of the utility model, described nonmetal seal ring outer ring is provided with O type circle.
As further improvement of the utility model, between flange of the described end and valve body lower end face, be provided with Composition spacer.
The utility model compared with prior art, advantage is: metallic packing ring and nonmetal seal ring, be fixed on valve body by trim ring by socket head screw, if when sealing surface damage or elastic sealing ring need to be replaced with more wear-resisting, corrosion resistant material, valve plate and valve shaft need not be dismantled, seal ring can on-line maintenance, reduces user cost; Valve plate is the one-piece parts adopting three eccentricity structure, and when driveing with neutral position, elastic sealing ring and sealing surface of valve plate, without interference, effectively reduce the wearing and tearing of sealing surface; Open time, valve plate can realize comprehensive unlatching of valve with less angle, close time, uniform force on sealing surface, frictional force and moment of torsion less, good sealing effect; Six roads of metallic packing ring and nonmetal seal ring composition seal to meet and require and strict occasion amount of leakage; Valve body and metallic packing ring fitting surface are serrate slot, and after trim ring compresses, between cog embeds metallic packing ring, guarantee that medium can not leak from seal ring and trim ring or valve body contact further; When fire occurs, metallic packing ring still can realize effective sealing; Two concentric elastic sealing rings of composition valve seat are compared with the valve seat of traditional three eccentric butterfly valve conical inclined surface, and cost of production is low, low to the requirement of assembler, and highly versatile, is suitable for mass production.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the topology view of valve plate in the utility model.
Fig. 3 is the partial enlarged drawing at I place in Fig. 1.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in Fig. 1 ~ 3, comprise screw rod 1, locking nut 2, hold-down grid 3, Gland 4, filler assembly 5, lining 6, valve plate 7, mounting hole 7.1, pin 8, limit assembly 9, Composition spacer 10, end flange 11, hex head bolt 12, spacer 13, socket head screw 14, trim ring 15, transmission shaft 16, valve body 17, nonmetal seal ring 18, metallic packing ring 19, O type circle 20 etc.
As shown in Fig. 1 ~ 3, a kind of fire-proof type three eccentricity of the utility model seal butterfly valve, comprise valve body 17, in valve body 17 cavity, valve plate 7 is installed, the mounting hole 7.1 of valve plate 7 is coaxially arranged with the through hole of valve body 17, run through in the through hole of valve body 17 and be provided with transmission shaft 16, mounting hole 7.1 is sheathed on transmission shaft 16; Stuffing box place, valve body 17 top is provided with filler assembly 5, filler assembly 5 upper end is provided with Gland 4, hold-down grid 3 is installed with on described Gland 4, and Gland 4 is fixed on valve body 17 upper-end surface by screw rod 1 and locking nut 2, and transmission shaft 16 upwards passes from the through hole of hold-down grid 3; Be disposed with metallic packing ring 19, nonmetal seal ring 18 and trim ring 15 on valve body 17, corresponding to the top of valve plate 7, be fastenedly connected by socket head screw 14 between trim ring 15 and valve body 17, be fixedly connected with by pin 8 between valve plate 7 with transmission shaft 16; Valve body 17 lower end is fixed with end flange 11 by hex head bolt 12, is provided with limit assembly 9, spacer 13 from top to bottom successively between flange of the described end 11 and transmission shaft 16 lower end surface; In the through hole of valve body 17, corresponding to the below of filler assembly 5 and the top of limit assembly 9, a lining 6 is set respectively.
Filler assembly 5 comprises Packing seat and filler spacer; Limit assembly 9 comprises bearing support, back-up ring, bearing; Nonmetal seal ring 18 outer ring is provided with O type circle 20; Be provided with Composition spacer 10 between end flange 11 and valve body 17 lower end surface, realize plane sealing by Composition spacer 10.
The cone type axis deviation of working principle of the present utility model: the valve plate 7 that the utility model adopts has three bias, transmission shaft 16 axis deviation valve plate 7 center--axial eccentric F, transmission shaft 16 axis deviation valve plate 7 sealing surface center-radial disbalance E, valve plate 7 sealing surface is in the eccentric α of valve body 17 cylinder axis-circular cone; Metallic packing ring 19 is that plate stamping is shaping, and inner face is toroidal surface, and nonmetal seal ring 18 forms for tubing turning, and inner face is the plane of inclination with several angle, and upper and lower surfaces, outside are the conical surfaces with certain angle of inclination, back side Intermediate Gray v-depression.Metallic packing ring 19, is fixed on valve body 17 by trim ring 15 by socket head screw 14; The serrate slot of valve body 17 embeds in metallic packing ring 19 and forms first sealing; The coordinating of valve plate 7 and metallic packing ring 19 form second to seal; Nonmetal seal ring 18 is fixed on valve body 17 by trim ring 15 by socket head screw 14, by positioning with the boss seam at trim ring 15 and metallic packing ring 19 endoporus place, its upper and lower surfaces are the conical surfaces with certain angle of inclination, and the summit of the conical surface coordinates formation third and fourth road to seal with the step surface of trim ring 15 and valve body 17; O shape circle 20 is arranged between the back side V-type groove of nonmetal seal ring 18 and valve body 17 step hole inwall, can form the 5th road sealing; Form the 6th road between nonmetal seal ring 18 medial slope and valve plate 7 to seal;
In closing process, valve plate 7 rotates around transmission shaft 16, and when driveing with neutral position, valve plate 7 does not contact with metallic packing ring 19, nonmetal seal ring 18, without interfering.When the valve is closed, the sealing surface work that valve plate 7 and nonmetal seal ring 18 form, can reach higher leakage grade; When fire occurs, nonmetal seal ring 18 lost efficacy, the sealing surface work that valve plate 7 and metallic packing ring 19 form, and had ensured the normal operation of equipment.
Metallic packing ring 19 can effectively improve leakage grade with the sealing surface of nonmetal seal ring 18 combination seal, when fire occurs, metallic packing ring 19 still can realize effective sealing, and metallic packing ring 19, nonmetal seal ring 18 and the even laminating of valve plate 7 oblique cone sealing surface greatly reduce the keying moment of valve.
Claims (5)
1. a fire-proof type three eccentricity seal butterfly valve, it is characterized in that: comprise valve body (17), valve plate (7) is installed in valve body (17) cavity, the mounting hole (7.1) of valve plate (7) and the through hole of valve body (17) are coaxially arranged, run through in the through hole of valve body (17) and be provided with transmission shaft (16), mounting hole (7.1) is sheathed on transmission shaft (16); Stuffing box place, valve body (17) top is provided with filler assembly (5), filler assembly (5) upper end is provided with Gland (4), hold-down grid (3) is installed with on described Gland (4), Gland (4) is fixed on valve body (17) upper-end surface by screw rod (1) and locking nut (2), and transmission shaft (16) upwards passes from the through hole of hold-down grid (3); Valve body (17) is upper, be disposed with metallic packing ring (19), nonmetal seal ring (18) and trim ring (15) corresponding to the top of valve plate (7), be fastenedly connected by socket head screw (14) between trim ring (15) and valve body (17), be fixedly connected with by pin (8) between valve plate (7) with transmission shaft (16); Valve body (17) lower end is fixed with end flange (11) by hex head bolt (12), is provided with limit assembly (9), spacer (13) between flange of the described end (11) and transmission shaft (16) lower end surface from top to bottom successively; In the through hole of valve body (17), corresponding to the below of filler assembly (5) and the top of limit assembly (9), a lining (6) is set respectively.
2. fire-proof type three eccentricity seal butterfly valve as claimed in claim 1, is characterized in that: described filler assembly (5) comprises Packing seat and filler spacer.
3. fire-proof type three eccentricity seal butterfly valve as claimed in claim 1, is characterized in that: described limit assembly (9) comprises bearing support, back-up ring, bearing.
4. fire-proof type three eccentricity seal butterfly valve as claimed in claim 1, is characterized in that: described nonmetal seal ring (18) outer ring is provided with O type circle (20).
5. fire-proof type three eccentricity seal butterfly valve as claimed in claim 1, is characterized in that: be provided with Composition spacer (10) between flange of the described end (11) and valve body (17) lower end surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520096332.4U CN204533567U (en) | 2015-02-10 | 2015-02-10 | Fire-proof type three eccentricity seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520096332.4U CN204533567U (en) | 2015-02-10 | 2015-02-10 | Fire-proof type three eccentricity seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204533567U true CN204533567U (en) | 2015-08-05 |
Family
ID=53747576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520096332.4U Active CN204533567U (en) | 2015-02-10 | 2015-02-10 | Fire-proof type three eccentricity seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204533567U (en) |
-
2015
- 2015-02-10 CN CN201520096332.4U patent/CN204533567U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |