CN204985869U - Internal type self tightening sealing welds axial -flow type check valve entirely - Google Patents
Internal type self tightening sealing welds axial -flow type check valve entirely Download PDFInfo
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- CN204985869U CN204985869U CN201520742896.0U CN201520742896U CN204985869U CN 204985869 U CN204985869 U CN 204985869U CN 201520742896 U CN201520742896 U CN 201520742896U CN 204985869 U CN204985869 U CN 204985869U
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Abstract
The utility model discloses an internal type self tightening sealing welds axial -flow type check valve entirely. Its characterized in that: preceding, back valve body welding forms the inside valve body that is spherical cavity together, be equipped with front liner (2), valve clack (3), back bush (9) in proper order on valve shaft (8), back valve body (11) is fixed in to wherein front liner (2) fixed connection in preceding valve body (1), valve clack (3) and valve shaft (8) fixed connection, back bush (9) valve barrel (7), valve barrel (7), the medial surface of valve body (1) and valve clack (3) contact is in the front seted up flutedly, is equipped with built -in self tightening sealing ring (4) in the recess to being fixed with limiting plate (5) of avoiding self tightening sealing ring (4) to deviate from the recess in the front on valve body (1) medial surface, should setting up and reduce required sealed specific pressure, have shock -absorbing function, can avoid producing the sparkling appearance, the noise reduction rationally applies to the axial -flow type check valve with the self tightening sealing effect, has realized that the zero leakage of axial -flow type check valve is sealed.
Description
Technical field
The utility model relates to a kind of safety check, particularly relates to a kind of built-in type self-tightening sealing and entirely welds axial flow type check valve.
Background technique
In the running of various long-distance transport pipes, how preventing medium from flowing backwards is a considerable problem.Axial flow type check valve has compact structure, and the sealing of streamline channel, low-pressure and low-pressure are opened, close without jam, sealed the features such as reliable.Heavy-caliber axial flow type check valve all adopted hard sealing to realize sealing in the past, require pile-up welding hard alloy on huge valve body, need to make corresponding cure process to the closely sealed position of flap and valve seat simultaneously, to make to keep certain difference of hardness between its surface hardness and valve seat, its objective is and ensure that flap is not engaged with valve seat while ensureing sealing.Realize metal and metal sealing requirement, higher coaxality must be had between valve seat and flap, surface roughness, Percent of contact area.This adds difficulty of processing and process-cycle undoubtedly, and especially the grinding of flap and valve seat is an operation not easily obtaining again excellent effect consuming time.
The present following drawback of axial flow type check valve ubiquity: 1. under high pressure occasion, in order to improve the working life of product, ensure seal pressure suitable between sealing surface, need to increase seal f ace width, but this can cause the circulation area of Venturi tube structure entrance point to reduce further, thus cause MEDIA FLOW to increase through the pressure loss of valve, bring unnecessary energy ezpenditure; 2. traditional single-lobe axial flow type check valve, its soft seal valve seat can produce deformation gradually under pressure medium effect, affects the normal sealing of valve.
Summary of the invention
The purpose of this utility model is, for the deficiencies in the prior art part, provides a kind of built-in type self-tightening sealing and entirely welds axial flow type check valve.
The utility model is that a kind of built-in type self-tightening sealing welds axial flow type check valve entirely, comprising: front valve shell 1, front lining 2, flap 3, in-built self-tightening sealing ring 4, limiting board 5, main spring 6, valve pocket 7, valve shaft 8, back bush 9 and rear valve body 11, wherein flap 3 is disc-shaped component, and valve pocket 7 is bowl-like member; Front valve shell 1 and rear valve body 11 are fixed together formation valve body, and valve inner is spherical hollow space; Valve shaft 8 is arranged with front lining 2, flap 3, back bush 9, the outer sheathed valve pocket 7 of back bush 9 along the axis of valve shaft 8 is outer successively from left to right; Wherein front lining 2 is fixed on front valve shell 1 by many 2 supporting ribs of circumference uniform distribution, and flap 3 is fixedly connected with valve shaft 8, and back bush 9 is fixedly connected with valve pocket 7, and valve pocket 7 is no less than 2 gussets by circumference uniform distribution and rear valve body 11 links together; Between flap 3 and valve pocket 7, be provided with main spring 6, the two ends difference contact of main spring 6 is on corresponding flap 3 and valve pocket 7 sidewall; The inner side surface that front valve shell 1 contacts with flap 3 offers groove, in groove, is provided with in-built self-tightening sealing ring 4, and on front valve shell 1 inner side surface, be fixed with the limiting board 5 avoiding self-tightening sealing ring 4 to deviate from groove.
Described valve shaft 8 is provided with feather key 10, is provided with guiding groove inside back bush 9.Feather key 10 and guiding groove are connected.
Front valve shell 1 and rear valve body 11 are welded together to form the valve body of spherical hollow space.
Described self-tightening sealing ring 4 comprises socket head screw 12, elastic washer 13, valve seat pressure ring 14, seating spring 17, O type circle 18, valve seat bearing ring 19, seal ring 20; Three is fixedly connected with through elastic washer 13, valve seat bearing ring 19, valve seat pressure ring 14 by socket head screw 12 successively, and seal ring 20 is folded between valve seat bearing ring 19 and valve seat pressure ring 14, and sealing circle 20 one end contacts with flap 3; Be connected by seating spring 17 on the left of valve seat bearing ring 19 with between front valve shell 1, on the downside of valve seat bearing ring 19 and between front valve shell 1, be provided with O type circle 18.
Described limiting board 5 has by flap side the scarf matched with flap 3.
Effect of the present utility model and advantage are:
1, in order to reduce resistance to water-flow, increase body cavity fluid passage, overcome bottleneck, the middle part of valve body is the sphere structure having round cavity, and this spherical structure is welded by the back segment hemisphere of front valve shell and rear valve body leading portion hemisphere.
2, valve body adopts front valve shell and rear valve body welded structure, and achieves the application in-built on axial flow type check valve of self-tightening sealing valve seat first.Adopt built-in type self-tightening sealing mode, not only reduce required seal pressure, and self-tightening sealing valve seat has shock-absorbing function under the double action of soft seal valve seat and seating spring, avoid hard seal valve seat metal to metal direct collision when flap returns and produce pyrophoric phenomenon, reduce noise, the deformation of valve seat insert under pressure medium can also be alleviated, extend the working life of safety check.Described self-tightening sealing mode, reasonably applies to axial flow type check valve by self-tightening sealing effect, and soft seal and hard seal combination are applied to axial flow type check valve, can be implemented in the zero leakage sealing within the scope of Applicable temperature.In addition, adopt self-tightening sealing mode to reduce seal pressure, thus avoid to ensure that suitable seal pressure increases valve base sealing area, cause valve seat entrance point Venturi tube structure circulation area to decline the pressure loss problem brought.
3, front valve shell valve seat location pile-up welding hard alloy, and be provided with sealing angle 1a that same valve clack sealing surface matches and valve clack sealing surface and match and form first metal sealing (auxiliary seal), valve seat bearing ring is provided with sealing angle 19a that same valve clack sealing surface matches and valve clack sealing surface and matches and form second metal sealing (auxiliary seal), valve seat insert sealing surface 20a and the closely sealed formation of flap the 3rd road soft seal (primary seal), the utility model achieves the application of triple seal on axial flow type check valve, when contingencies such as breaking out of fires, effectively prevent reflux medium from a large amount of leakages between flap and in-built seal ring, and there is fire-proof function.
4, limiting board has by flap side the scarf matched with flap, after flap is opened, significantly reduce the flow resistance that fluid flows through valve, and in flap closing course, effectively prevent the possibility that collides between limiting board and flap, reduce limiting board to the damage of flap.
5, valve shaft 8 is provided with feather key 10, is provided with guiding groove inside back bush 9, and feather key 10 and guiding groove are connected, and flap is operated steadily and effectively prevent the rotation of flap.
Accompanying drawing explanation
Fig. 1: axial flow type check valve structural drawing is welded in in-built self-tightening sealing entirely;
In figure: front valve shell 1, front lining 2, flap 3, in-built self-tightening sealing ring 4, limiting board 5, main spring 6, valve pocket 7, valve shaft 8, back bush 9, feather key 10, rear valve body 11;
Fig. 2: Figure 1A portion's enlarged view;
In figure: socket head screw 12, elastic washer 13, valve seat pressure ring 14, elastic washer 15, socket head screw 16, seating spring 17, O type circle 18, valve seat bracing ring 19, valve seat insert 20;
Fig. 3: Figure 1B portion's enlarged view;
In figure: front valve shell 1, limiting board 5, valve seat pressure ring 14, elastic washer 15, socket head screw 16;
Fig. 4: sealing surface schematic diagram
In figure: valve body sealing surface 1a, bearing ring sealing surface 19a, seal ring sealing surface 20a.
Specific embodiment
Built-in type self-tightening sealing welds an axial flow type check valve entirely as shown in Figure 1, comprises front valve shell 1, front lining 2, flap 3, in-built self-tightening sealing ring 4, limiting board 5, main spring 6, valve pocket 7, valve shaft 8, back bush 9 and rear valve body 11, wherein front valve shell and rear valve body weld together, flap 3 is disc-shaped component, and valve pocket 7 is bowl-like member.Front valve shell 1 and rear valve body 11 are fixed together formation valve body, and valve inner is spherical hollow space, this construction reduces resistance to water-flow, increases body cavity fluid passage, overcomes bottleneck; Valve shaft 8 is arranged with front lining 2, flap 3, back bush 9 along the axis of valve shaft 8 is outer successively from left to right, valve shaft 8 is provided with feather key 10, be provided with guiding groove inside back bush 9, feather key 10 and guiding groove are connected, and flap is operated steadily and effectively prevent the rotation of flap.The outer sheathed valve pocket 7 of back bush 9; Wherein front lining 2 is fixed on front valve shell 1 by many 2 supporting ribs of circumference uniform distribution, and flap 3 is fixedly connected with valve shaft 8, and back bush 9 is fixedly connected with valve pocket 7, and valve pocket 7 is no less than 2 gussets by even circumferential distribution and rear valve body 11 links together; Between flap 3 and valve pocket 7, be provided with main spring 6, the two ends of main spring 6 withstand on corresponding flap 3 and valve pocket 7 sidewall respectively; The inner side surface that front valve shell 1 contacts with flap 3 offers 1 groove, in groove, is provided with in-built self-tightening sealing ring 4, and on front valve shell 1 inner side surface, be fixed with the limiting board 5 avoiding self-tightening sealing ring 4 to deviate from groove.Adopt this built-in type self-tightening sealing mode, not only reduce required seal pressure, and self-tightening sealing valve seat has shock-absorbing function under the double action of soft seal valve seat and seating spring, avoid hard seal valve seat metal to metal direct collision when flap returns and produce pyrophoric phenomenon, reduce noise, the deformation of valve seat insert under pressure medium can also be alleviated, extend the working life of safety check.Described self-tightening sealing mode, reasonably applies to axial flow type check valve by self-tightening sealing effect, and soft seal and hard seal combination are applied to axial flow type check valve, can be implemented in the zero leakage sealing within the scope of Applicable temperature.In addition, adopt self-tightening sealing mode to reduce seal pressure, thus avoid to ensure that suitable seal pressure increases valve base sealing area, cause valve seat entrance point Venturi tube structure circulation area to decline the pressure loss problem brought.
Described self-tightening sealing ring 4 by socket head screw 12, elastic washer 13, valve seat pressure ring 14, seating spring 17, O type circle 18, valve seat bearing ring 19, seal ring 20 forms; Valve seat bearing ring 19 is positioned at valve seat pressure ring 14 lower end, is connected with elastic washer 13 by socket head screw 12 with valve seat pressure ring 14, plays the effect of restriction fit sealing circle 20; Seal ring 20 one end contacts with flap 3; Be connected by seating spring 17 on the left of valve seat bearing ring 19 with between front valve shell 1, on the downside of valve seat bearing ring 19 and between front valve shell 1, be provided with O type circle 18.
Described front valve shell valve seat location pile-up welding hard alloy, and be provided with sealing angle that same valve clack sealing surface matches and valve clack sealing surface and match and form first metal sealing (auxiliary seal), valve seat bearing ring is provided with sealing angle that same valve clack sealing surface matches and valve clack sealing surface and matches and form second metal sealing (auxiliary seal), valve seat insert and the closely sealed formation of flap the 3rd road soft seal (primary seal), the utility model achieves the application of triple seal on axial flow type check valve, when contingencies such as breaking out of fires, effectively prevent reflux medium from a large amount of leakages between flap and in-built seal ring, and there is fire-proof function.
Described limiting board 5 limits the motion of seal ring 4, be installed on front valve shell 1 by elastic washer 15 and socket head screw 16, be positioned at the side that self-tightening sealing ring 4 is outer, limiting board 5 has by flap side the scarf matched with flap 3, after flap is opened, significantly reduce the flow resistance that fluid flows through valve, and effectively can prevent the possibility that collides between limiting board and flap in flap closing course, reduce limiting board to the damage of flap.
With reference to figure 1, valve opening process is: medium moves from left to right, and flap 3 is opened gradually under medium active force, and media fraction kinetic transformation is the potential energy of main spring 6, until flap 3 is opened completely.Under the effect of main spring 6, cushion the direct collision of flap 3 pairs of valve pockets 7, reduced noise.The annular streamline channel that medium is formed along valve pocket 7 and flap 3 flows out, and flows out the valve port of valve right-hand member.
With reference to figure 1, valve closing process is: after the compressor before this valve or pump stop, the pressure of flap 3 leading portion reduces suddenly, and it is rapidly to left movement under the acting in conjunction of reflux medium and main spring 6, realize valve rapid-closing, the potential energy converting and energy of main spring 6 becomes the kinetic energy of flap 3 times seats.After flap 3 touches in-built self-tightening sealing ring 4, displacement is obstructed, flap 3 continues toward moving left under medium effect, until the cemented carbide sealing surface of flap 3 and front valve shell 1 hard alloy surface close contact form initial sealing, now valve seat bearing ring 19 moves under medium effect overleaf from left to right, due to self-tightening sealing effect, valve seat bracing ring sealing surface and valve clack sealing surface close contact form second and seal, valve seat insert 20 is tightly fitted on valve clack sealing surface simultaneously, form three seals (primary seal), block medium from the leakage way between flap 3 and valve seat, the O type circle 20 arranged between valve seat bearing ring 19 and front valve shell 1 has blocked the leakage way between valve seat bracing ring 19 and front valve shell 1, realizes zero leakage when closing.
With reference to figure 1, back and forth movement between the back bush 9 of setting in valve pocket 7 in the flap front lining 2 that flap 3 drives valve shaft 8 to arrange at front valve shell 1 opening, in closing process and rear valve body 11, setting due to lining makes motion light, flexible, valve shaft 8 is provided with feather key 10 simultaneously, guiding groove is provided with inside back bush 9, feather key and guiding groove are connected, and valve is operated steadily, and effectively prevent flap to rotate.
With reference to figure 1, Fig. 2 and Fig. 4, when valve is in closed condition, if contingencies such as breaking out of fires, valve seat insert 20 and O type circle 18 will be burnt.Flap 3 is past under medium effect to be moved left, the pile-up welding hard alloy sealing surface close contact of flap 3 and valve body 1, valve seat bearing ring 19 moves right under seating spring 17 promotes simultaneously, the cemented carbide sealing surface close contact of valve seat bearing ring 19 and flap 3 built-up welding, effectively prevent reflux medium from flap 3 and a large amount of leakages between valve seat bearing ring 19 and valve body 1, prevent the generation of fire.
Claims (6)
1. a built-in type self-tightening sealing welds axial flow type check valve entirely, it is characterized in that: comprise front valve shell (1), front lining (2), flap (3), in-built self-tightening sealing ring (4), limiting board (5), main spring (6), valve pocket (7), valve shaft (8), back bush (9) and rear valve body (11), wherein flap (3) is disc-shaped component, and valve pocket (7) is bowl-like member; Front valve shell (1) and rear valve body (11) are fixed together formation valve body, and valve inner is spherical hollow space; Valve shaft (8) is arranged with front lining (2), flap (3), back bush (9) along the axis of valve shaft (8) is outer successively from left to right, and back bush (9) is sheathed valve pocket (7) outward; Wherein front lining (2) is no less than 2 supporting ribs by circumference uniform distribution and is fixed on front valve shell (1), flap (3) is fixedly connected with valve shaft (8), back bush (9) is fixedly connected with valve pocket (7), and valve pocket (7) is no less than 2 gussets by circumference uniform distribution and rear valve body (11) links together; Between flap (3) and valve pocket (7), be provided with main spring (6), the two ends of main spring (6) withstand on corresponding flap (3) and valve pocket (7) sidewall respectively; The inner side surface contacted with flap (3) at front valve shell (1) offers groove, be provided with in-built self-tightening sealing ring (4) in groove, and on front valve shell (1) inner side surface, be fixed with the limiting board (5) avoiding self-tightening sealing ring (4) to deviate from groove.
2. built-in type self-tightening sealing welds axial flow type check valve entirely according to claim 1, it is characterized in that: described valve shaft (8) is provided with feather key (10), back bush (9) inner side is provided with guiding groove, and feather key and guiding groove are connected.
3. built-in type self-tightening sealing welds axial flow type check valve entirely according to claim 1, it is characterized in that: front valve shell (1) and rear valve body (11) are welded together to form spherical valve body.
4. built-in type self-tightening sealing welds axial flow type check valve entirely according to claim 1, it is characterized in that: described self-tightening sealing ring (4) comprises socket head screw (12), elastic washer (13), valve seat pressure ring (14), seating spring (17), O type circle (18), valve seat bearing ring (19), seal ring (20); Three is fixedly connected with through elastic washer (13), valve seat bearing ring (19), valve seat pressure ring (14) by socket head screw (12) successively, seal ring (20) is folded between valve seat bearing ring (19) and valve seat pressure ring (14), and sealing circle (20) one end contacts with flap (3); Valve seat bearing ring (19) left side is connected by seating spring (17) with between front valve shell (1), is provided with O type circle (18) between valve seat bearing ring (19) downside and front valve shell (1).
5. built-in type self-tightening sealing welds axial flow type check valve entirely according to claim 4, it is characterized in that: the inner side surface that front valve shell (1) contacts with flap (3) is piled and is welded with hard alloy layer.
6. built-in type self-tightening sealing welds axial flow type check valve entirely according to claim 1, it is characterized in that: described limiting board (5) has the scarf matched with flap (3) by flap side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520742896.0U CN204985869U (en) | 2015-09-23 | 2015-09-23 | Internal type self tightening sealing welds axial -flow type check valve entirely |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520742896.0U CN204985869U (en) | 2015-09-23 | 2015-09-23 | Internal type self tightening sealing welds axial -flow type check valve entirely |
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| CN204985869U true CN204985869U (en) | 2016-01-20 |
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| CN201520742896.0U Active CN204985869U (en) | 2015-09-23 | 2015-09-23 | Internal type self tightening sealing welds axial -flow type check valve entirely |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106763933A (en) * | 2016-12-15 | 2017-05-31 | 安徽海拓志永智能装备股份有限公司 | A kind of new one-way pneumatic valve arrangement |
| CN106763930A (en) * | 2016-12-15 | 2017-05-31 | 安徽海拓志永智能装备股份有限公司 | A kind of large-scale pneumatic check valve |
| WO2017161434A1 (en) * | 2016-03-22 | 2017-09-28 | Guide Valve Limited | Ball valve seat with triple seal |
| CN107524837A (en) * | 2017-08-23 | 2017-12-29 | 上海伟伦阀门集团江苏有限公司 | Dual-seal axial flow type check valve |
| CN113944763A (en) * | 2021-10-09 | 2022-01-18 | 欧维克集团有限公司 | High-performance zero-leakage axial flow type check valve |
| CN114776824A (en) * | 2022-05-25 | 2022-07-22 | 哈尔滨理工大学 | Buffering seal valve seat structure |
-
2015
- 2015-09-23 CN CN201520742896.0U patent/CN204985869U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017161434A1 (en) * | 2016-03-22 | 2017-09-28 | Guide Valve Limited | Ball valve seat with triple seal |
| CN109073097A (en) * | 2016-03-22 | 2018-12-21 | 盖得阀有限公司 | Ball valve seat with triple seal |
| CN106763933A (en) * | 2016-12-15 | 2017-05-31 | 安徽海拓志永智能装备股份有限公司 | A kind of new one-way pneumatic valve arrangement |
| CN106763930A (en) * | 2016-12-15 | 2017-05-31 | 安徽海拓志永智能装备股份有限公司 | A kind of large-scale pneumatic check valve |
| CN107524837A (en) * | 2017-08-23 | 2017-12-29 | 上海伟伦阀门集团江苏有限公司 | Dual-seal axial flow type check valve |
| CN113944763A (en) * | 2021-10-09 | 2022-01-18 | 欧维克集团有限公司 | High-performance zero-leakage axial flow type check valve |
| CN113944763B (en) * | 2021-10-09 | 2023-11-24 | 欧维克集团有限公司 | High-performance zero-leakage axial flow type check valve |
| CN114776824A (en) * | 2022-05-25 | 2022-07-22 | 哈尔滨理工大学 | Buffering seal valve seat structure |
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Address after: No. 26, Yuchuan Road, high tech Industrial Park, Zigong, Sichuan, 643000 Patentee after: Sichuan Dewei Valve Co.,Ltd. Address before: No. 26, Yuchuan Road, high tech Industrial Park, Zigong, Sichuan, 643000 Patentee before: SICHUAN VOLANT VALVE Co.,Ltd. |