CN204900962U - Sealed relief valve of multi -level buffer formula bulb fine setting - Google Patents
Sealed relief valve of multi -level buffer formula bulb fine setting Download PDFInfo
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- CN204900962U CN204900962U CN201520474379.XU CN201520474379U CN204900962U CN 204900962 U CN204900962 U CN 204900962U CN 201520474379 U CN201520474379 U CN 201520474379U CN 204900962 U CN204900962 U CN 204900962U
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- spool
- valve body
- valve
- round
- plug
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Abstract
The utility model discloses a sealed relief valve of multi -level buffer formula bulb fine setting relates to the relief valve in the engineering machinery hydraulic system equipment field, and its aim at provides a pressure release security and higher and be applicable to the sealed relief valve of multi -level buffer formula bulb fine setting of large -traffic pipeline. Its technical scheme does: which comprises the following components: a valve body, offered into water runner on the valve body, the interior intracavity of valve body is equipped with end cap subassembly, case, plug screw, and the valve body end -to -end connection has an end cap, and the end cap subassembly lies in into between water runner and the case, and the case includes outer case, nested well case in outer case, has offered outer core round, SMIS round on outer case, the well case, and the sectional area of outer core round is greater than the sectional area of SMIS round, and under the nested state, outer core round and SMIS round are linked together, be equipped with the second spring between well case and the end cap subassembly, the outer case other end is connected with the plug screw, is equipped with the third spring between the well case other end and the plug screw. The utility model is suitable for a relief valve.
Description
Technical field
The utility model belongs to construction machinery hydraulic system apparatus field, relates to a kind of safety valve, is specifically related to a kind of Multi-stage buffer type bulb fine setting sealed relief 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, liquid is very easily revealed, and pressure release Security is lower, and can not be applicable in the pipeline of high-pressure high-flow.
Summary of the invention
For solving the problems of the technologies described above, the purpose of this utility model is to provide a kind of pressure release Security higher and is applicable to the Multi-stage buffer type bulb fine setting sealed relief valve of large discharge pipeline.
For achieving the above object, the technical solution of the utility model is:
A kind of Multi-stage buffer type bulb fine setting sealed relief valve, comprise valve body, described valve body offers the water inlet flow channel with the inner space of valve body along the axis of valve body, spool is provided with successively outward by interior in the inner chamber of valve body, plug screw, valve body end is connected with plug, its composition main points are: be also provided with the plug component that can move axially along valve body in the inner chamber of valve body, described plug component is between water inlet flow channel and spool, described plug component offers bulb and place groove, described bulb is placed in groove and is placed with rubber bulb, described rubber bulb and bulb are placed between bottom portion of groove and are provided with fine setting spring, described spool comprise hollow shape outer spool, be nested in can move axially along outer spool in outer spool in spool, one end one_to_one corresponding near plug screw on outer spool, middle spool offers the outer core round of through hole shape, the SMIS round of through hole shape, the sectional area of outer core round is greater than the sectional area of SMIS round, under nested condition, outer core round is connected with SMIS round, be provided with the second spring between middle spool and plug component, the outer spool the other end is connected with plug screw, is provided with the 3rd spring between the middle spool the other end and plug screw.
When the water inlet flow channel internal pressure of valve body reaches certain value, promotion plug component moves, thus forming sluice at the water outlet of plug component and water inlet flow channel, outside water enters in the inner chamber of valve body via water inlet flow channel, sluice, and is finally discharged by outer core round, SMIS round.
Aperture due to outer core round is greater than the aperture of SMIS round, thus certain at the flow arranged outward via SMIS round, when the flow of inlet water of the water inlet flow channel of valve body is greater than the drain discharge that SMIS round arranges outward, pressure in body cavity will increase gradually, and promote plug component continuation motion, when pressure increase is to certain value, the elastic force of the 3rd spring is less than hydraulic pressure, during the active force of the second spring centering spool, middle spool is by the lateral movement be forced near plug screw, make middle spool, outer spool is at SMIS round, outer core round place is separated formation second sluice, thus increase the transverse drainage sectional area of spool, improve the drain discharge of spool.
When in the water inlet flow channel of valve body, flow of inlet water is less, rubber bulb makes the end contact of the end face of rubber bulb and the water inlet flow channel end of valve body under the effect of fine setting spring, and this rubber bulb can adjust the position of rubber bulb adaptively according to the flatness of end face and inclination angle, make rubber bulb contact with the end face seal of water inlet flow channel end.
Object of the present invention can also be realized by following approach:
The external frame of outer spool is divided into from down to up: lower valve face, middle valve face, upper valve face, on the longitudinal section passing through outer center spool axis, the shape of lower valve face is inside diminishing arcuation parabola from top to bottom, the shape of middle valve face is straight line, and the shape of upper valve face is the arcuation parabola outwards increased gradually from top to bottom.
The surface of contact that valve body and plug contact with each other also is provided with seal ring.
The outer surface of valve interior surface and outer spool is all piled and is welded with high-chromium alloy wearing layer.
Compared with prior art, the beneficial effects of the utility model are:
1, in the utility model, possess multi-buffer pressure relief and pressure release Security is higher, the pressure leak process of water inlet flow channel is stable, fast and be applicable to large discharge pipeline.Spool is made up of outer spool and middle spool, and when the pressure in water inlet flow channel is less, water is discharged by the SMIS round of middle spool; When the hydraulic pressure of water inlet flow channel is larger, water is arranged outward by SMIS round and the mistake water flow passage between middle spool and outer spool, and whole safety valve pressure leak process good stability, controllability are strong.In addition, change the linear contact lay between the end face of plug component and the end face in water inlet flow channel outlet port into face when safety valve cuts out and contact, improve the area of contact between valve body and plug component when safety valve cuts out, improve sealability between the two, not easily reveal; 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; And rubber bulb can have more the flatness of water inlet flow channel distal end faces and inclination angle adjusts position adaptively, make both contact sealings better, the leakage of anti-sealing.
2, in the utility model, in conjunction with computation fluid dynamics Theoretical Design runner, make the pressure distribution relative equilibrium of liquid stream in spool opening-closing process, effectively control hydraulic power thus, avoid play and the impact of spool.
3, in the utility model, the surface of contact that the end face of valve body and the end face of plug contact with each other also is provided with seal ring, can further improve the sealability of safety valve, prevent leak of liquid.
4, in the utility model, the outer surface of valve interior surface and outer spool is all piled and is welded with high-chromium alloy wearing layer, effectively can be improved wear-resisting property, the impact resistance of the outer surface of valve interior surface and outer spool by this high-chromium alloy wearing layer.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the partial enlarged drawing of Fig. 1 at I place;
Fig. 3 is the phase diagram of Fig. 1 when hydraulic pressure is less in water inlet flow channel;
Fig. 4 is the phase diagram of Fig. 1 when hydraulic pressure is larger in water inlet flow channel;
Fig. 5 is the partial enlarged drawing of rubber bulb and valve body joint in the utility model;
Wherein, reference character is: 1-valve body, 2-rubber bulb, 3-plug component, the 4-the second spring, the 6-the second outlet passage, 7-outer spool, 8-middle spool, 9-bulb place groove, the 10-the three spring, the 11-the three outlet passage, 12-plug screw, 13-seal ring, 14-plug, 15-water inlet flow channel, the 16-the first outlet passage, 17-outer core round, 18-damping hole, 19-SMIS round, the 20-the four outlet passage, 24-fine setting spring, 25-spherical water outlet, 71-lower valve face, 72-middle valve face, 73-upper valve face.
Embodiment
Below in conjunction with accompanying drawing, model utility is described further:
Embodiment one
A kind of Multi-stage buffer type bulb fine setting sealed relief valve, comprise valve body 1, plug component 3, spool and plug screw 12 is provided with in valve body 1, plug component 3, spool and plug screw 12 is arranged outward by interior successively in the inner chamber of valve body 1, valve body 1 one end offers water inlet flow channel 15, this water inlet flow channel 15 and valve body 1 inner space, valve body 1 the other end has been threaded plug 14, is enclosed in the inner chamber of valve body 1 by plug component 3, spool and plug screw 12 by plug 14.
Plug component 3 is positioned at the inner chamber of valve body 1 and can moves around along the axis of valve body 1 inner chamber, plug component 3 offers on the end face of water inlet flow channel 15 side bulb and place groove 9, this bulb is placed in groove 9 and is provided with rubber bulb 2, and rubber bulb 2 can be placed in groove 9 at bulb and freely rotate; Rubber bulb 2 and bulb are also provided with between placing bottom groove 9 and finely tune spring 24, rubber bulb 2 can according to the flatness of water inlet flow channel 15 distal end faces and adaptively modifying position, inclination angle under the effect of fine setting spring 24, the end face of rubber bulb 2 is fully contacted with water inlet flow channel 15 distal end faces, improves the sealability of contact position.When the hydraulic pressure in water inlet flow channel 15 exceedes a certain value time, promotion plug component 3 outwards moves along the axis of valve body 1 inner chamber by the active force that hydraulic pressure acts on plug component 3, thus between the end face and the end face of water inlet flow channel 15 water outlet of plug component 3, forms the mistake water flow passage supplying water and circulate.Plug component 3 offers some first outlet passages 16 along its circumference, and the axis of some first outlet passages 16 be parallel to each other and all with the axis being parallel of plug component 3.
Spool comprises outer spool 7, the middle spool 8 of hollow shape, middle spool 8 to be nested in outer spool 7 and can to move axially along outer spool 7, outer spool 7 offers the second outlet passage 6 near the side of plug component 3, and the mistake water flow passage formed between the inwall of the external frame of this second outlet passage 6 and outer spool 7, valve body 1 is communicated with.Outer spool 7, middle spool 8 near the end of plug screw 12 for being horn-like structure, and the horn-like structure position of outer spool 7 offers outer core round 17, the horn-like structure position of middle spool 8 offers SMIS round 19, and outer core round 17 and SMIS round 19 coaxial line and the sectional area of outer core round 17 are greater than the sectional area of SMIS round 19.Under nested condition, the horn-like structure position of outer spool 7 envelopes the horn-like structure position (as shown in Figure 1,3) of middle spool 8, and outer core round 17 is connected with SMIS round 19; When hydraulic pressure increases to a certain degree, the horn-like structure position of outer spool 7 and the horn-like structure position of middle spool 8 depart from (as shown in Figure 4) mutually.Middle spool 8 two ends respectively correspondence are provided with the second spring 4, the 3rd spring 10, second spring 4 between middle spool 8 and plug component 3, and the 3rd spring 10 is between middle spool 8 and plug screw 12.
The mode that plug screw 12 is threaded connection is installed in the inner chamber of valve body 1, and the mode that plug 14 is also threaded connection is installed on the end of valve body 1.Plug screw 12 offers the 3rd outlet passage 11, plug 14 offers the 4th outlet passage 20, when the end face of plug component 3 and the end face of water inlet flow channel 15 water outlet depart from, water inlet flow channel 15, first outlet passage 16, second outlet passage 6, the 3rd outlet passage 11 are communicated with the mistake water flow passage forming drainage with the 4th outlet passage 20.
Working principle of the present utility model is: when water inlet flow channel 15 internal pressure of valve body 1 is larger, promote plug component 3 to move, thus form sluice at plug component 3 and the water outlet of water inlet flow channel 15, outside water enters in the inner chamber of valve body 1 via water inlet flow channel 15, sluice, and is finally discharged by outer core round 17, SMIS round 19, aperture due to outer core round 17 is greater than the aperture of SMIS round 19, thus certain at the flow via the outer row of SMIS round 19, when the flow of inlet water of the water inlet flow channel 15 of valve body 1 is greater than the drain discharge of the outer row of SMIS round 19, pressure in valve body 1 inner chamber will increase gradually, and promote plug component 3 continuation motion, when pressure increase is to certain value, the elastic force of the 3rd spring 10 is less than hydraulic pressure, during the active force of the second spring 4 centering spool 8, middle spool 8 is by the lateral movement be forced near plug screw 12, make middle spool 8, outer spool 7 is at SMIS round 19, outer core round 17 place is separated formation second sluice, thus increase the transverse drainage sectional area of spool, improve the drain discharge of spool.
Embodiment two
On the basis of embodiment one, SMIS round 19 inside is provided with damping hole 18, damping hole 18 draining aperture be less than the aperture of SMIS round 19, thus, when in water inlet flow channel 15, hydraulic pressure is less, water is discharged by damping hole 18, and due to the cross section of damping hole 18 less, the flow that water in water inlet flow channel 15 is arranged outward is less, hydraulic pressure in water inlet flow channel 15 increases faster, and thus can make middle spool 8 with outer spool 7 at round place quick separating, pressure release is accelerated in raising.
Embodiment three
On the basis of embodiment one or embodiment two, the external frame of outer spool 7 is divided into from down to up: lower valve face 71, middle valve face 72, upper valve face 73, on the longitudinal section passing through outer spool 7 central axis, the shape of lower valve face 71 is inside diminishing arcuation parabola from top to bottom, the shape of middle valve face 72 is straight line and the length of middle valve face 72 is 100 to 400mm, and the shape of upper valve face 73 is the arcuation parabola outwards increased gradually from top to bottom.For make water flow in runner more smooth and easy, reduce vibration, be easy to outer row, the degree that lower valve face 71 externally tilts is less than the degree that valve face 73 externally tilts.
Embodiment four
On the basis of above-described embodiment, the surface of contact that valve body 1 and plug 14 contact with each other also is provided with seal ring 13.The surface of contact that the end face of valve body 1 and the end face of plug 14 contact with each other also is provided with seal ring 13, can further improve the sealability of safety valve, prevent leak of liquid.
Embodiment five
On the basis of above-described embodiment, the outer surface of valve body 1 internal surface and outer spool 7 is all piled and is welded with high-chromium alloy wearing layer, and the thickness of built-up welding depends on the needs.
In the chemical composition of high-chromium alloy wearing layer Kohlenstoffgehalt reach 4 to 5%, chromium content up to 25 to 30%, in its metallographic structure, the volume fraction of Cr7C3 carbide reaches more than 50%, and macrohardness is HRC56 to 62, and the hardness of chromium carbide is HV1400 to 1800.Because carbide is formed in the perpendicular distribution of wear direction, even if compare with the casting alloy of hardness with congruent, wear-resisting property is enhanced about more than once, and has good impact resistance, can bear impact and wearing and tearing that high-pressure water flow causes.In addition, high-chromium alloy wearing layer contains the crome metal of high percentage, therefore makes the outer surface of valve body 1 internal surface and outer spool 7 all have necessarily antirust and corrosion resistance.
The outer surface of valve body 1 internal surface and outer spool 7 is all piled and is welded with high-chromium alloy wearing layer, effectively can be improved wear-resisting property, the impact resistance of the outer surface of valve body 1 internal surface and outer spool 7 by this high-chromium alloy wearing layer.
Claims (4)
1. a Multi-stage buffer type bulb fine setting sealed relief valve, comprise valve body (1), described valve body (1) offers the water inlet flow channel (15) with the inner space of valve body (1) along the axis of valve body (1), spool is provided with successively outward by interior in the inner chamber of valve body (1), plug screw (12), valve body (1) end is connected with plug (14), it is characterized in that: in the inner chamber of valve body (1), be also provided with the plug component (3) that can move axially along valve body (1), described plug component (3) is positioned between water inlet flow channel (15) and spool, described plug component (3) offers bulb and place groove (9), described bulb is placed in groove (9) and is placed with rubber bulb (2), described rubber bulb (2) and bulb are provided with between placing bottom groove (9) and finely tune spring (24), described spool comprise hollow shape outer spool (7), be nested in outer spool (7) the middle spool (8) that can move axially along outer spool (7), the upper one end one_to_one corresponding near plug screw (12) of outer spool (7), middle spool (8) offers the outer core round (17) of through hole shape, the SMIS round (19) of through hole shape, the sectional area of outer core round (17) is greater than the sectional area of SMIS round (19), under nested condition, outer core round (17) is connected with SMIS round (19), be provided with the second spring (4) between middle spool (8) and plug component (3), outer spool (7) the other end is connected with plug screw (12), is provided with the 3rd spring (10) between middle spool (8) the other end and plug screw (12).
2. Multi-stage buffer type bulb fine setting sealed relief valve as claimed in claim 1, it is characterized in that: the external frame of outer spool (7) is divided into from down to up: lower valve face (71), middle valve face (72), upper valve face (73), on the longitudinal section passing through outer spool (7) central axis, the shape of lower valve face (71) is inside diminishing arcuation parabola from top to bottom, the shape of middle valve face (72) is straight line, and the shape of upper valve face (73) is the arcuation parabola outwards increased gradually from top to bottom.
3. Multi-stage buffer type bulb fine setting sealed relief valve as claimed in claim 1, is characterized in that: the surface of contact that valve body (1) and plug (20) contact with each other also is provided with seal ring (13).
4. Multi-stage buffer type bulb fine setting sealed relief valve as claimed in claim 1, is characterized in that: the outer surface of valve body (1) internal surface and outer spool (7) is all piled and is welded with high-chromium alloy wearing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520474379.XU CN204900962U (en) | 2015-06-30 | 2015-06-30 | Sealed relief valve of multi -level buffer formula bulb fine setting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520474379.XU CN204900962U (en) | 2015-06-30 | 2015-06-30 | Sealed relief valve of multi -level buffer formula bulb fine setting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204900962U true CN204900962U (en) | 2015-12-23 |
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ID=54923138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520474379.XU Expired - Fee Related CN204900962U (en) | 2015-06-30 | 2015-06-30 | Sealed relief valve of multi -level buffer formula bulb fine setting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204900962U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU188815U1 (en) * | 2018-10-24 | 2019-04-24 | Публичное акционерное общество "Авиационная корпорация "Рубин" | HYDRAULIC SAFETY VALVE |
| CN111503331A (en) * | 2020-03-25 | 2020-08-07 | 北京九州尚阳科技有限公司 | Pressure reducing device |
-
2015
- 2015-06-30 CN CN201520474379.XU patent/CN204900962U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU188815U1 (en) * | 2018-10-24 | 2019-04-24 | Публичное акционерное общество "Авиационная корпорация "Рубин" | HYDRAULIC SAFETY VALVE |
| CN111503331A (en) * | 2020-03-25 | 2020-08-07 | 北京九州尚阳科技有限公司 | Pressure reducing device |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20160630 |