CN204459328U - Safety valve - Google Patents
Safety valve Download PDFInfo
- Publication number
- CN204459328U CN204459328U CN201520147244.2U CN201520147244U CN204459328U CN 204459328 U CN204459328 U CN 204459328U CN 201520147244 U CN201520147244 U CN 201520147244U CN 204459328 U CN204459328 U CN 204459328U
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- CN
- China
- Prior art keywords
- valve body
- push rod
- plug
- flow channel
- water inlet
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Abstract
A kind of safety valve, relates to a kind of safety valve of safety protection device, its object is to provide the safety valve that a kind of contact, drain time are short.Its technological scheme is: comprise valve body, valve body is along the axis of valve body, radial correspondence respectively offers the water inlet flow channel with the inner space of valve body, outlet passage, push rod is provided with successively outward by interior in the inner chamber of valve body, spring and plug screw, push rod contacts with plug screw, spring housing is located on push rod, both ends of the spring is located by push rod and plug screw, valve body end is connected with plug, can along the plug component of valve body axial direction movement in the inner chamber also comprising valve body, plug component one end and ejector pin contact, plug component the other end end face and valve body the water outlet of water inlet flow channel end contact and cover the water outlet of water inlet flow channel.The utility model is applicable to safety valve.
Description
Technical field
The utility model relates to a kind of safety protection device, is specifically related to a kind of safety valve.
Background technique
Safety valve is in normally off under open-shut device is subject to External Force Acting, when the pressure medium in equipment or pipeline increases to over specified value, exceedes specified value by preventing pressure medium in pipeline or equipment to discharge medium outside system.Safety valve belongs to self-acting valve class, and be mainly used on boiler, pressure vessels and pipes, pilot pressure is no more than specified value, has run important protective action to personal safety and equipment.Safety valve plays safety protection effect in systems in which; when system pressure exceedes specified value, safety valve is opened, and enters outside air/pipeline by a part of gas/fluid in system; make system pressure be no more than permitted value, thus guarantee system does not have an accident because of overpressure.
Existing safety valve mainly comprises the parts such as valve body, spool, joint, spring, push rod and plug, valve body offers water inlet flow channel and outlet passage, valve core housing is contained in valve body, and spool one end stretch into valve body water inlet flow channel in and shutoff is carried out to water inlet flow channel, the spool the other end is connected with push rod by spring, and the other end of valve body is by plug shutoff.When the liquid capacity in valve inleting water runner increases, the pressure in runner increases, when pressure increases to a certain degree, Compress Spring, spool moves, and spool and valve body depart from, water inlet flow channel and outlet passage are interconnected, and unnecessary liquid is discharged by outlet passage; After unnecessary liquid is discharged, spring recovers deformation, and spool is oppositely movement again, spool and valve body contact shutoff water inlet flow channel.
Application number is that the utility model patent of 201120523212.x discloses one from buffering multistage safety valve, and the inner chamber of the valve body of described safety valve is provided with the first limited step and the second limited step; Described spool is arranged in described valve body, and described plug is arranged on the rear end of described valve body; Described pressure adjusting spring and described buffer are socketed on described spool, conflict on the spacing preiection of described spool in described pressure adjusting spring one end, the other end is conflicted on described buffer, the spacing preiection of described spool coordinates with described first limited step, and described buffer coordinates with described second limited step; The front end of described valve body is provided with liquid entering hole, is provided with liquid return hole between described liquid entering hole and described first limited step.This model utility provide from buffering multistage safety valve, though be convenient to dismounting and maintenance, and manufacturing difficulty is reduced while raising full hydraulic excavator driving speed reducer reliability, but spool and valve interior surface are linear contact lay when spool carries out shutoff to valve flowing channel, area of contact is little, and liquid is very easily revealed; In addition, it is realized by the conical surface of spool front end that spool carries out shutoff to valve flowing channel, and thus at the same pressure (amount of spring compression is identical), flow through the flow in gap between spool and valve flowing channel less, the fluid discharge time is longer.
Summary of the invention
For solving the problems of the technologies described above, the safety valve that the purpose of this utility model is to provide a kind of contact, drain time short.
For achieving the above object, the technical solution of the utility model is:
A kind of safety valve, comprise valve body, valve body is along the axis of valve body, radial correspondence respectively offers the water inlet flow channel with the inner space of valve body, outlet passage, push rod is provided with successively outward by interior in the inner chamber of valve body, spring and plug screw, push rod contacts with plug screw, spring housing is located on push rod, both ends of the spring is located by push rod and plug screw, valve body end is connected with plug, it is characterized in that: can along the plug component of valve body axial direction movement in the inner chamber also comprising valve body, plug component one end and ejector pin contact, when safety valve cuts out plug component the other end end face and valve body the water outlet of water inlet flow channel end contact and cover the water outlet of water inlet flow channel.
Further, the plug component end face contacted offers groove, be provided with rubber gasket in groove with water inlet flow channel, the end face of described rubber gasket covers the water outlet of water inlet flow channel.
Further, plug screw is threaded with valve interior wall, and plug screw axially offers the blind hole for limiting lift rod stroke along plug screw, and push rod end stretches in blind hole.
Have prior art to compare, the beneficial effects of the utility model are:
1, when safety valve cuts out, the face that the linear contact lay between the outer conical surface of spool with valve body inner cylindrical surface changes between the end face of valve body and the end face of plug component is contacted, improve the area of contact between valve body and plug component when safety valve cuts out, improve sealability between the two, not easily reveal; In addition, when safety valve is opened, under identical fluid pressure, amount of spring compression is identical, and the flow flowing through water-in and water-out runner in the unit time is larger, thus shortens the drain time of liquid.
The end face of 2, plug component arranges rubber gasket, because rubber gasket has certain distortion under the effect of spring power, effectively can block the water outlet of water inlet flow channel, sealability is better, and liquid is more not easily revealed.
3, plug screw is threaded with valve interior wall, and screw plunger end offers blind hole, and this blind hole is mainly used in the stroke limiting push rod, and the displacement distance of push rod processed under high-pressure situations, prevents push rod, plug screw etc. from skidding off.
Accompanying drawing explanation
Fig. 1 is the structural representation under the utility model closed condition;
Fig. 2 is the structural representation under the utility model opening state;
Fig. 3 is the structural representation of seal ring in the utility model embodiment four;
Wherein, reference character is: 1-valve body, 2-plug component, 3-push rod, 4-spring, 5-plug screw, 6-plug, 7-rubber gasket, 8-seal ring, 11-water inlet flow channel, 12-outlet passage, 21-groove, 51-blind hole, 81-shim body, 82-outer rubber circle, 83-inner rubber circle, 84-ripple dentary frame.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Embodiment one
A kind of safety valve, comprises valve body 1, plug component 2, push rod 3, spring 4, plug screw 5 and plug 6(as shown in the figure 1 or 2).A cavity is provided with in valve body 1, this cavity extends internally from the face, one end of valve body 1 but is not communicated with other end, valve body 1 the other end along it axially, radial direction offers water inlet flow channel 11, outlet passage 12 respectively, this water inlet flow channel 11, outlet passage 12 all with the cavity connects of valve body 1.Plug component 2, push rod 3, spring 4 and plug screw 5 are all positioned at the cavity of valve body 1, and plug component 2, push rod 3, spring 4 and plug screw 5 are placed outward along the axial direction of valve body 1 by interior in cavity.The end face of plug component 2 one end can with the end contact of valve body 1 at water inlet flow channel 11 water outlet, when safety valve cuts out both ends of the surface contact with each other block water inlet flow channel 11 and outlet passage 12 be communicated with and the end face of plug component 2 covers the water outlet of water inlet flow channel 11, when safety valve is opened, both ends of the surface are separated from each other, and water inlet flow channel 11 and outlet passage 12 are interconnected; The center position of plug component 2 the other end is provided with groove.What be close to plug component 2 setting is push rod 3, push rod 3 is provided with the projection suitable with the groove of plug component 2 in the side near plug component 2, this projection is positioned at groove, therefore push rod 3 can be made to promote plug component 2 single-way moving by the active force between protruding and groove.Push rod 3 the other end is elongated and is the cylindrical end of rod-like structure, and spring 4 is set on cylindrical end, and spring 4 one end is located by the shaft shoulder of push rod 3.The end of the cylindrical end of push rod 3 is connected with plug screw 5, plug screw 5 is threaded with the internal surface of valve body 1, the convex portion of plug screw 5 is connected with the cylindrical end of push rod 3, and both connections can be the contacts of separable end face and end face, also can be to be fixedly connected with by modes such as welding, be threaded.Valve body 1 end is provided with plug 6, and this plug 6 is threaded with valve body 1 internal surface, and the convex portion of plug 6 withstands on the end face of plug screw 5.
When in safety valve water inlet flow channel 11, hydraulic pressure is less, the end face of plug component 2 and valve body 1 are at the end contact (safety valve cuts out) of water inlet flow channel 11 water outlet, water inlet flow channel 11 separates with outlet passage 12 is disconnected, because both contact in face, end, add area of contact between the two, sealability between the two strengthens, and liquid is not easily revealed; After in water inlet flow channel 11, hydraulic pressure increases to certain value, the active force of hydraulic pressure on plug component 2 is greater than spring 4 when acting on the active force on plug component 2 by push rod 3, hydraulic pressure will promote plug component 2 outwards movement, thus the end face of plug component 2 and valve body 1 are separated from each other (safety valve is opened) at the end face of water inlet flow channel 11 water outlet, water inlet flow channel 11 and outlet passage 12 are interconnected, and liquid will flow out from outlet passage 12; Along with the outflow of liquid, hydraulic pressure in water inlet flow channel 11 reduces, and plug component 2 slowly moves inward, and the most finally with the end contact (safety valve cut out) of valve body 1 at water inlet flow channel 11 water outlet.
Embodiment two
On the basis of embodiment one, the end face that plug component 2 contacts with water inlet flow channel 11 offers groove, be provided with rubber gasket 7 in described groove, and the thickness of this rubber gasket 7 is higher than the degree of depth of groove, makes the end face of rubber gasket 7 higher than the end face of plug component 2.When safety valve cuts out, the end face of rubber gasket 7 and valve body 1 water inlet flow channel 11 water outlet end contact and cover the water outlet of water inlet flow channel 11, block being communicated with of water inlet flow channel 11 and outlet passage 12; When safety valve is opened, the end face of rubber gasket 7 is separated with the end face of valve body 1 at water inlet flow channel 11 water outlet, is communicated with water inlet flow channel 11 and outlet passage 12.
Embodiment three
On the basis of embodiment one, embodiment two, plug screw 5 is connected with valve body 1 inner thread, plug screw 5 offers the blind hole 51 for limiting push rod 3 stroke along the axis of plug screw 5, the cylindrical end of push rod 3 stretches in this blind hole 51, gap is had between cylindrical end outer surface and blind hole 51 internal surface, thus cylindrical end can in blind hole 51 the sliding axially of sample blind hole 51, but the degree of depth of blind hole 51 is certain, thus the degree of depth of blind hole 51 has carried out certain restriction to the stroke of cylindrical end, thus limits the stroke of push rod 3.
Embodiment four
On the basis of above-described embodiment, the surface of contact that the end face of valve body 1 and the end face of plug 6 contact with each other also is provided with seal ring 8, is can further improve the sealability of safety valve by sealing circle 8, prevent leak of liquid.Described seal ring 8 comprises shim body 81, and the radial direction along shim body 81 in shim body 81 is provided with ripple dentary frame 84, outer rubber circle 82 and inner rubber circle 83 from outer successively toward interior.Outer rubber circle 82 and inner rubber circle 83 are O type circle, and two rubber o-rings all adopt the corrosion resistant rubber material of high temperature high voltage resistant, fill graphite and form shim body 81 outside outside rubber ring 82, inner rubber circle 83 and ripple dentary frame 84.
During use, bolt on after gasket seal 8 mounting flange device, first first by compressive strain at the inner rubber circle 83 of the effect innermost circle of pretightening force, produce first layer sealing.Then along with the change of load, outer rubber circle 82 also produces amount of deformation.The amount of deformation of two rubber rings reaches as high as more than 40%, has been enough to reach good sealing effect.Now the main seal link of flange-interface is by the outer rubber circle 82 in pad, inner rubber circle 83 in action.If load continues to increase, ripple dentary frame 84 produces distortion, enhanced leaktightness again, and ripple dentary frame 84 and outer rubber circle 82, inner rubber circle 83 have rebound elasticity, automatically can regulate decrement along with the change of load, thus produce best sealing effect.
Claims (3)
1. a safety valve, comprise valve body (1), valve body (1) is along the axis of valve body (1), radial direction respectively correspondence offers the water inlet flow channel (11) with the inner space of valve body (1), outlet passage (12), push rod (3) is provided with outward successively by interior in the inner chamber of valve body (1), spring (4) and plug screw (5), push rod (3) contacts with plug screw (5), spring (4) is set on push rod (3), spring (4) two ends are located by push rod (3) and plug screw (5), valve body (1) end is connected with plug (6), it is characterized in that: can along the plug component (2) of valve body (1) axial direction movement in the inner chamber also comprising valve body (1), plug component (2) one end contacts with push rod (3), when safety valve cuts out plug component (2) the other end end face and valve body (1) the water outlet of water inlet flow channel (11) end contact and cover the water outlet of water inlet flow channel (11).
2. safety valve as claimed in claim 1, it is characterized in that: plug component (2) end face contacted with water inlet flow channel (11) offers groove (21), be provided with rubber gasket (7) in groove (21), the end face of described rubber gasket (7) covers the water outlet of water inlet flow channel (11).
3. safety valve as claimed in claim 1 or 2, it is characterized in that: plug screw (5) is connected with valve body (1) inner thread, plug screw (5) axially offers the blind hole (51) for limiting push rod (3) stroke along plug screw (5), and push rod (3) end stretches in blind hole (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520147244.2U CN204459328U (en) | 2015-03-16 | 2015-03-16 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520147244.2U CN204459328U (en) | 2015-03-16 | 2015-03-16 | Safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204459328U true CN204459328U (en) | 2015-07-08 |
Family
ID=53666213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520147244.2U Expired - Fee Related CN204459328U (en) | 2015-03-16 | 2015-03-16 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204459328U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799560A (en) * | 2018-07-27 | 2018-11-13 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of blocking valve with vapour vertical shaft |
-
2015
- 2015-03-16 CN CN201520147244.2U patent/CN204459328U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108799560A (en) * | 2018-07-27 | 2018-11-13 | 中国电力工程顾问集团西北电力设计院有限公司 | A kind of blocking valve with vapour vertical shaft |
| CN108799560B (en) * | 2018-07-27 | 2023-11-03 | 中国电力工程顾问集团西北电力设计院有限公司 | Blocking valve of steam distribution vertical shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150708 Termination date: 20160316 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |