CN104896157A - Direct-acting type safety valve - Google Patents
Direct-acting type safety valve Download PDFInfo
- Publication number
- CN104896157A CN104896157A CN201510276452.7A CN201510276452A CN104896157A CN 104896157 A CN104896157 A CN 104896157A CN 201510276452 A CN201510276452 A CN 201510276452A CN 104896157 A CN104896157 A CN 104896157A
- Authority
- CN
- China
- Prior art keywords
- direct
- safety valve
- power safety
- spool
- fixed block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
- F16K1/385—Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
- F16K1/465—Attachment of sealing rings to the valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0466—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with a special seating surface
Abstract
The invention discloses a direct-acting type safety valve which comprises a valve seat (1), a valve element (2) an a pressure-adjusting fixing piece (7). The pressure-adjusting fixing piece (7) is connected to the tail of the valve element (2) and capable of driving the head of the valve element (2) to stretch into an inner cavity of the valve seat (1). The outer surface of the head of the valve element (2) is provided with a tapered sealing face so that a sealing space can be formed between the valve seat (1) and the head of the valve element (2). The direct-acting type safety valve further comprises an elastic connection piece (6). The elastic connection piece (6) is arranged between the pressure-adjusting fixing piece (7) and the valve element (2). The direct-acting type safety valve is better in airtightness, larger in oil through amount, smooth in opening/closing operation and small in noise.
Description
Technical field
The present invention relates to hydraulic equipment, particularly, relate to that a kind of logical oil mass is large, the direct-power safety valve of better tightness.
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 the Special valve of 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, thus ensures not have an accident because of overpressure, has run important protective action to personal safety and equipment.
Existing safety valve machining accuracy is difficult to ensure, plane sealing is too high to its housing processing request, poor sealing performance, and logical oil mass is too small, is difficult to the usage requirement of the huge discharge commutator adapting to progressively increase.Meanwhile, spool is opened and is had some setbacks, and often occurs the problems such as pressure shake, noise.
Summary of the invention
The object of this invention is to provide a kind of direct-power safety valve, this direct-power safety valve better tightness, logical oil mass are larger, and operate smooth and easy when opening or close, and noise is little.
To achieve these goals, the invention provides a kind of direct-power safety valve, comprise valve seat, spool and pressure regulation fixed block, pressure regulation fixed block is connected to the afterbody of spool and pressure regulation fixed block can drive the head of spool to extend in the inner chamber of valve seat, the outer surface of the head of spool is provided with conical seal (contact) face to make sealing strip to be formed between valve seat and the head of spool, direct-power safety valve also comprises Flexible Connector, and Flexible Connector is arranged between pressure regulation fixed block and spool.
Preferably, Flexible Connector is spring.
Preferably, direct-power safety valve also comprises spring seat, and one end of spring seat is connected with the afterbody of spool, and the other end is connected with one end of spring.
Preferably, spring seat comprises pedestal and positioning convex, and one end of pedestal is connected with the afterbody of spool, the other end is provided with positioning convex and one end of spring can be sheathed on positioning convex to be connected with the other end of pedestal.
Preferably, pedestal is cylindrical body and the bore of pedestal is identical with the bore of the end of pressure regulation fixed block.
Preferably, pressure regulation fixed block is pressure regulating screw.
Preferably, the connecting end of pressure regulation fixed block and spring is outward extended with guide protrusions, and guide protrusions can extend in spring.
Preferably, the periphery wall of the afterbody of valve seat forms ring shaped slot, and in ring shaped slot, be provided with the ring seal circle matched with ring shaped slot.
Preferably, the one or both sides of O-ring seal are provided with annular retaining ring.
According to technique scheme, pressure regulation fixed block is connected to the afterbody of spool by the present invention, can extend in the inner chamber of valve seat by driving pressure regulation fixed block with the head of movable valve plug.The head of valve seat and spool adopts labyrinth seal mutually to seal, and improves the sealing connected therebetween, makes interior media be not easy to reveal, avoids causing potential safety hazard.Flexible Connector being set between pressure regulation fixed block and spool, for the resilience of auxiliary pressure regulation fixed block when opening, whole direct-power safety valve being opened more smooth and easy.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation according to the direct-power safety valve in the preferred embodiment of the present invention.
Description of reference numerals
1-valve seat 2-spool
3-ring seal circle 4-annular retaining ring
51-pedestal 52-positioning convex
6-Flexible Connector 7-pressure regulation fixed block
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, the nouns of locality be included in term such as " upper and lower, inside and outside " only represents the orientation of this term under normal service condition, or being commonly called as those skilled in the art's understanding, and should not be considered as the restriction to this term.
See Fig. 1, the invention provides a kind of direct-power safety valve, comprise valve seat 1, spool 2 and pressure regulation fixed block 7, pressure regulation fixed block 7 is connected to the afterbody of spool 2 and pressure regulation fixed block 7 can drive the head of spool 2 to extend in the inner chamber of valve seat 1, the outer surface of the head of spool 2 is provided with multiple comb tooth to make labyrinth seal to be formed between the head of valve seat 1 and spool 2, direct-power safety valve also comprises Flexible Connector 6, and Flexible Connector 6 is arranged between pressure regulation fixed block 7 and spool 2.
By technique scheme, pressure regulation fixed block 7 being connected to the afterbody of spool 2, can extending in the inner chamber of valve seat 1 with 2 heads of movable valve plug by driving pressure regulation fixed block 7.The head of valve seat 1 and spool 2 is sealed mutually by labyrinth seal, improves the sealing connected therebetween, makes interior media be not easy to reveal, avoids causing potential safety hazard.Flexible Connector 6 being set between pressure regulation fixed block 7 and spool 2, for the resilience of auxiliary pressure regulation fixed block 7 when opening, whole direct-power safety valve being opened more smooth and easy.
In the present embodiment, Flexible Connector 6 can be the structure that any one common in related domain has auxiliary resilience function, but considers from the angle reducing cost of production and be convenient to repair, change, and preferably, Flexible Connector 6 is spring.
When regulating the position of pressure regulation fixed block 7, the area of contact of spring and spool 2 is little, tractive force is not enough and easily rupture, virtually add the maintenance cost of direct-power safety valve, for avoiding the generation of this situation, preferred direct-power safety valve also comprises spring seat, and one end of spring seat is connected with the afterbody of spool 2, and the other end is connected with one end of spring.
The area of contact of spring and spool 2 is added after using spring seat, simultaneously, the conveniently assembling of spring and spring seat, improve production work efficiency, save human cost, preferred spring seat comprises pedestal 51 and positioning convex 52, and one end of pedestal 51 is connected with the afterbody of spool 2, the other end is provided with positioning convex 52 and one end of spring can be sheathed on positioning convex 52 to be connected with the other end of pedestal 51.Like this when assembling, the positioning convex 52 that only one end of spring need be set in spring seat affixedly just can ensure that spring coordinates with spring seat closely, the stability in increase adjustment process.
When opening pressure regulation fixed block 7, spring seat and spring resilience simultaneously, for preventing springback process medi-spring to be distorted, affect its normal regulating action, preferred pedestal 51 is cylindrical body and the bore of pedestal 51 is identical with the bore of the end of pressure regulation fixed block 7.Adopt this technological scheme, the outer wall of pedestal 51 tightly can be fitted with the outer casing inner wall of safety valve, not easily deflects, and is formed serve good leading role to the resilience of spring.
Above-mentioned Flexible Connector 6 can be the structure that any one common in related domain has auxiliary resilience function, but considers from the angle reducing cost of production and be convenient to repair, change, and preferred pressure regulation fixed block 7 is pressure regulating screw.
In addition, in order to make pressure regulation fixed block 7 more stable with the linkage structure of spring, difficult drop-off so that affect the normal regulating of whole direct-power safety valve, preferably, pressure regulation fixed block 7 and the connecting end of spring are outward extended with guide protrusions, and guide protrusions can extend in spring.
In order to promote the sealability of whole direct-power safety valve further, effectively preventing the medium of its inside from leaking, preferably, the periphery wall of the afterbody of valve seat 1 forming ring shaped slot, and in ring shaped slot, be provided with the ring seal circle 3 matched with ring shaped slot.
The material of direct-power safety valve mostly is rigid (as steel, iron), and O-ring seal 3 is flexible material (as rubber), promoted by high pressure oil when time in the cell body that O-ring seal 3 is placed in ring shaped slot, rubber ring easily occurred, extruded breakage by the assemblage gap of safety valve and cause leakage of oil, have a strong impact on the sealability of direct-power safety valve, in order to solve this technical problem, preferably, the one or both sides of O-ring seal 3 are provided with annular retaining ring 4.Like this, annular retaining ring 4 can replace flexible material directly to contact with rigid material, makes O-ring seal 3 can ensure its sealing function lastingly.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (9)
1. a direct-power safety valve, comprise valve seat (1), spool (2) and pressure regulation fixed block (7), described pressure regulation fixed block (7) is connected to the afterbody of described spool (2) and described pressure regulation fixed block (7) can drive the head of described spool (2) to extend in the inner chamber of described valve seat (1), it is characterized in that, the outer surface of the head of described spool (2) is provided with conical seal (contact) face to make sealing strip to be formed between the head of described valve seat (1) and described spool (2), described direct-power safety valve also comprises Flexible Connector (6), described Flexible Connector (6) is arranged between described pressure regulation fixed block (7) and spool (2).
2. direct-power safety valve according to claim 1, is characterized in that, described Flexible Connector (6) is spring.
3. direct-power safety valve according to claim 2, is characterized in that, described direct-power safety valve also comprises spring seat, and one end of described spring seat is connected with the afterbody of described spool (2), and the other end is connected with one end of described spring.
4. direct-power safety valve according to claim 3, it is characterized in that, described spring seat comprises pedestal (51) and positioning convex (52), one end of described pedestal (51) is connected with the afterbody of described spool (2), the other end is provided with described positioning convex (52) and one end of described spring can be sheathed on described positioning convex (52) to be connected with the other end of described pedestal (51).
5. direct-power safety valve according to claim 4, is characterized in that, described pedestal (51) is for cylindrical body and the bore of described pedestal (51) is identical with the bore of the end of described pressure regulation fixed block (7).
6. according to the direct-power safety valve in claim 1-5 described in any one, it is characterized in that, described pressure regulation fixed block (7) is pressure regulating screw.
7. according to the direct-power safety valve in claim 2-5 described in any one, it is characterized in that, described pressure regulation fixed block (7) and the connecting end of described spring are outward extended with guide protrusions, and described guide protrusions can extend in described spring.
8. according to the direct-power safety valve in claim 1-5 described in any one, it is characterized in that, the periphery wall of the afterbody of described valve seat (1) forms ring shaped slot, and in described ring shaped slot, is provided with the ring seal circle (3) matched with described ring shaped slot.
9. direct-power safety valve according to claim 8, is characterized in that, the side of described O-ring seal (3) is provided with annular retaining ring (4), O type circle side high pressure, back-up ring side low pressure, and back-up ring prevents O type circle from being extruded by high pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510276452.7A CN104896157B (en) | 2015-05-26 | 2015-05-26 | Direct-power safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510276452.7A CN104896157B (en) | 2015-05-26 | 2015-05-26 | Direct-power safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104896157A true CN104896157A (en) | 2015-09-09 |
| CN104896157B CN104896157B (en) | 2017-12-01 |
Family
ID=54029009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510276452.7A Expired - Fee Related CN104896157B (en) | 2015-05-26 | 2015-05-26 | Direct-power safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104896157B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015178A (en) * | 2016-08-05 | 2016-10-12 | 芜湖中意液压科技股份有限责任公司 | Full-hydraulic steering gear with compact safety valve |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055222A (en) * | 1998-08-07 | 2000-02-22 | Kyosan Denki Kk | Pressure adjusting device for compressed gas |
| CN202252194U (en) * | 2011-09-13 | 2012-05-30 | 龙工（上海）桥箱有限公司 | Overflow valve for excavator main control valve |
| CN202360828U (en) * | 2011-12-09 | 2012-08-01 | 巨隆集团芜湖兴隆液压有限公司 | Medium-flow safety valve for compound sealing |
| CN103353000A (en) * | 2013-06-28 | 2013-10-16 | 宁波长壁流体动力科技有限公司 | Safety valve on hydraulic pipe |
| CN204253512U (en) * | 2014-11-20 | 2015-04-08 | 宁波克泰液压有限公司 | Differential type overload valve |
| CN204664532U (en) * | 2015-05-26 | 2015-09-23 | 芜湖中意液压科技股份有限责任公司 | Direct-power safety valve |
-
2015
- 2015-05-26 CN CN201510276452.7A patent/CN104896157B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000055222A (en) * | 1998-08-07 | 2000-02-22 | Kyosan Denki Kk | Pressure adjusting device for compressed gas |
| CN202252194U (en) * | 2011-09-13 | 2012-05-30 | 龙工（上海）桥箱有限公司 | Overflow valve for excavator main control valve |
| CN202360828U (en) * | 2011-12-09 | 2012-08-01 | 巨隆集团芜湖兴隆液压有限公司 | Medium-flow safety valve for compound sealing |
| CN103353000A (en) * | 2013-06-28 | 2013-10-16 | 宁波长壁流体动力科技有限公司 | Safety valve on hydraulic pipe |
| CN204253512U (en) * | 2014-11-20 | 2015-04-08 | 宁波克泰液压有限公司 | Differential type overload valve |
| CN204664532U (en) * | 2015-05-26 | 2015-09-23 | 芜湖中意液压科技股份有限责任公司 | Direct-power safety valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106015178A (en) * | 2016-08-05 | 2016-10-12 | 芜湖中意液压科技股份有限责任公司 | Full-hydraulic steering gear with compact safety valve |
| CN106015178B (en) * | 2016-08-05 | 2018-01-30 | 芜湖中意液压科技股份有限责任公司 | All-hydraulic steering gear with compact safety valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104896157B (en) | 2017-12-01 |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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Granted publication date: 20171201 Termination date: 20180526 |