CN105605254A - Supplement load type high-pressure air safety valve with buffering on-off function - Google Patents
Supplement load type high-pressure air safety valve with buffering on-off function Download PDFInfo
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- CN105605254A CN105605254A CN201610155177.8A CN201610155177A CN105605254A CN 105605254 A CN105605254 A CN 105605254A CN 201610155177 A CN201610155177 A CN 201610155177A CN 105605254 A CN105605254 A CN 105605254A
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- valve
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- valve seat
- spring
- disc
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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
- 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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention relates to a supplement load type high-pressure air safety valve with a buffering on-off function. The air inlet end of a valve body is internally connected with a floating type valve base through a reset spring. A valve disk is arranged on the floating type valve base. The valve disk is connected with a pressure spring through a spring base to form a double-spring floating sealing structure used in the sealing process of the floating type valve base and the valve disk. The valve base moves along with the valve disk, and the reset spring absorbs most impact energy. A valve sleeve is installed between the valve base and the valve body, the middle of the valve sleeve is in sliding and sealing connection with the valve disk. A gap through which an air inlet hole of the valve base is communicated with an air inlet of the valve body is formed between the valve sleeve and the valve base. A protruding shoulder is arranged at the lower end of the valve base. The protruding shoulder is in clearance fit connection with a step hole in the lower end of the valve sleeve to form a limiting structure for movement of the valve base, and the limiting structure is used for playing a limiting role at the moment when the valve base is opened to guarantee that the safety valve is reliably turned on. The on-off property and reliability of the high-pressure air safety valve are greatly improved, and the high-pressure air safety valve can be widely applied to mechanical industry equipment or pipelines in an air system to play an overpressure protection role.
Description
Technical field
The present invention relates to a kind of high-pressure air safety valve that plays overpressure protection effect on mechanical industry equipment in high pressure air system or pipeline that is arranged on.
Background technology
Safety valve is mounted on equipment or pipeline, plays in the time that equipment or pipeline medium exceed authorized pressure value, automatically a kind of safety guard of take-off release pressure. In the time that on equipment or pipeline, pressure exceedes authorized pressure, when the medium power on valve disc of acting on is greater than weight or spring force, valve disc automatic-ascending, valve opening, exhaust apparatus or pipeline inner pressure. When equipment or pipeline inner pressure are reduced to after the operating pressure of regulation, valve disc is under the effect of weight or spring force, and automatic fall-back forms sealing to valve seat, stops media discharge. The pressure medium of equipment or pipeline is under the protection of safety valve, under the sustainable operating pressure that maintains setting.
Safety valve belongs to automatic valve, spring loaded safety valve is most popular one type, high pressure gas safety valve as disclosed in patent CN201672115U, the disclosed high-pressure air safety valve of gas safety valve, CN101324282A and the disclosed a kind of high pressure gas safety valve of CN105020445A that the disclosed a kind of flow of CN203115207U is adjustable, can, by adjusting spring force, set the opening pressure of safety valve. When equipment or pipeline inner pressure reach after blow pressure, safety valve cuts out automatically. There is following shortcoming in existing this class safety valve: along with the rising (do not reach and set operating pressure) of pressure medium, the sealing force of valve port is reducing, and is unfavorable for the sealing property of safety valve valve port under closed condition, causes opening pressure unstable; And near opening pressure and blow pressure in the course of work, valve disc can frequently contact with sealing surface, valve disc is more violent to the impulse ratio of sealing surface, often causes the destruction of sealing surface, has limited greatly safety in utilization and the reliability of safety valve. Therefore, developing a kind of can buffering opens and closes and the stable high-pressure air safety valve of opening pressure to improve its safety and reliability be new problem urgently to be resolved hurrily always.
Summary of the invention
For the defect existing in prior art, the present invention aims to provide a kind of advanced design, rational in infrastructure, safety valve is opened front good sealing effect, opening pressure supplementary load formula band stable, that reliability is high cushions the high-pressure air safety valve that opens and closes function.
To achieve these goals, the present invention is by the following technical solutions: a kind of supplementary load formula band buffering opens and closes the high-pressure air safety valve of function, comprise valve body, valve seat, valve pocket, blind nut, pressure spring, spring base, valve disc, back-moving spring, described valve body top connects blind nut, described valve body lower end is provided with air inlet, side, middle part is provided with exhaust outlet, valve seat upper end is provided with sealing surface, in described valve body inlet end, connect floating type valve seat by back-moving spring, above floating type valve seat, be provided with valve disc, valve disc connects pressure spring by spring base and forms dual spring floating sealing structure, for floating type valve seat and valve disc seal process, valve seat moves with valve disc, absorb most of impact energy by back-moving spring, effectively avoid the sealing surface that opening-closing process causes to impact damaged, between described valve seat and valve body, valve pocket is housed, and valve pocket middle part is connected with valve disc slipper seal, side, valve pocket middle part is provided with the venthole of the exhaust outlet that is communicated with valve body, valve disc side is provided with the venthole that is communicated with valve disc lower end air inlet, between valve pocket and valve seat, there is the gap that is communicated with the air admission hole of valve seat and the air inlet of valve body, valve seat lower end is provided with convex shoulder, and the stepped hole matched in clearance of convex shoulder and valve pocket lower end connects and composes the position limiting structure of valve seat motion, open moment for valve seat and play position-limiting action, guarantee safety valve is opened reliably.
Described blind nut top is threaded for regulating the pressure spring lid of pressure spring pressure.
In the time that the opening pressure of high-pressure air safety valve described in the circulation medium pressure ratio in system is low, valve seat is at back-moving spring upwards under active force and the acting in conjunction of medium power, valve seat upper end sealing surface is pressed on the induction port of valve disc, and the lower plane of valve disc produces power upwards and pressure spring lid compression pressure spring and produces downward active force and balance each other.
In the time that the pressure medium in system is increased to valve seat starting pressure, described valve seat moves upward together with valve disc, after pressure continues to increase, when valve seat convex shoulder moves to the spacing place, stepped hole bottom surface of valve pocket, described valve seat stop motion, valve disc upwards continues motion, the valve open of high-pressure air safety valve, exhaust system pressure.
In the time that the pressure medium in system is reduced to blow pressure, described valve disc falls after rise and steadily contacts with the sealing surface on valve seat, and moves downward together, absorbs valve disc return the most of impact energy of seat, the valve closing of high-pressure air safety valve by back-moving spring.
The invention has the beneficial effects as follows:
The present invention compared with prior art, the floating-type seal structure of design, effectively avoid safety valve valve disc to return the impact breakage to sealing surface of seat in a process, valve seat moves with valve disc, absorb most of impact energy by back-moving spring, the keying number of times that has greatly improved safety valve, extended service life. Valve seat sports limiting structure and the floating-type seal structure acting in conjunction of design, realized safety valve and reached the front more more reliable function of high sealing performance of pressure medium of opening pressure, and the active force that pressure medium is produced valve seat is converted into sealing force; In the time that valve seat moves to spacing place, position limiting structure produces pressure medium again active force to valve seat is transferred on valve pocket, has ensured opening pressure of safety valve stability.
Brief description of the drawings
Fig. 1 is the high-pressure air safety valve structure cutaway view that supplementary load formula band buffering of the present invention opens and closes function.
Detailed description of the invention
Below in conjunction with accompanying drawing and specific embodiment, the invention will be further described.
As shown in Figure 1, a kind of supplementary load formula band buffering opens and closes the high-pressure air safety valve of function, comprises valve body 1, valve seat 2, valve pocket 3, blind nut 4, pressure spring lid 5, pressure spring 6, spring base 7, locating ring 8, valve disc 9, back-moving spring 10.
Valve body 1 top connects blind nut 4, valve body 1 lower end is provided with air inlet A, side, middle part is provided with exhaust outlet B, valve seat 2 upper ends are provided with sealing surface, in valve body 1 inlet end, connect floating type valve seat 2 by back-moving spring 10, and floating type valve seat 2 is provided with valve disc 9 above, valve disc 9 connects pressure spring 6 by spring base 7 and forms dual spring floating sealing structure, for floating type valve seat 2 and valve disc 9 seal process, valve seat 2, with valve disc 9 motions, absorbs most of impact energy by back-moving spring 10; Effectively avoid the sealing surface that opening-closing process causes to impact damaged. Between valve seat 2 and valve body 1, valve pocket 3 is housed, and valve pocket 3 middle parts are connected with valve disc 9 slipper seals, valve pocket 3 sides, middle part are provided with the venthole of the exhaust outlet B that is communicated with valve body 1, valve disc 9 sides are provided with the venthole that is communicated with valve disc 9 lower end air inlets, between valve pocket 3 and valve seat 2, there is the gap that is communicated with the air admission hole of valve seat 2 and the air inlet A of valve body 1, valve seat 2 lower ends are provided with convex shoulder, and the stepped hole matched in clearance of convex shoulder and valve pocket 3 lower ends connects and composes the position limiting structure of valve seat motion, open moment for valve seat 2 and play position-limiting action, guarantee safety valve is opened reliably. Blind nut 4 tops are threaded for regulating the pressure spring lid 5 of pressure spring 6 pressure.
Position limiting structure is made up of valve seat 2, valve pocket 3, between valve seat 2 and valve pocket 3, there is gap, and sports limiting mechanism and the floating-type seal structure acting in conjunction of valve seat 2 and valve pocket 3, realized safety valve and reached the front more more reliable function of high sealing performance of pressure medium of opening pressure, the active force that pressure medium produces valve seat 2 is converted into sealing force; In the time that valve seat 2 moves to valve pocket 3 spacing place, position limiting structure produces pressure medium again active force to valve seat 2 is transferred on valve pocket, has ensured opening pressure of safety valve stability.
Operation principle: the initial position of safety valve is " closing ", when the opening pressure of the circulation medium pressure ratio safety valve in system low, valve seat 2 is at back-moving spring 10 upwards under active force and the acting in conjunction of medium power, the sealing surface of valve seat 2 is pressed on the seal of valve disc 9 tightly, the lower plane that this medium acts on valve disc 9 simultaneously produces power upwards, and the active force upwards that this power and locating ring 8 produce by spring base 7 and pressure spring lid 5 compress pressure spring 6 and produce downward active force and balance each other. Now, between the convex shoulder of valve seat 2 and valve pocket 3, there is a gap, ensure that valve is reliably in closed condition.
In the time that the pressure medium in system is increased to certain pressure, valve seat 2 moves upward together with valve disc 9, when pressure continues to increase pressure to opening pressure, when valve seat 2 convex shoulders move to valve pocket 3 spacing place, valve seat 2 stop motions, valve disc 9 upwards continues motion, valve open, exhaust system pressure. In the time that the pressure medium in system is reduced to blow pressure, valve disc 9 falls after rise and steadily contacts with the sealing surface on valve seat 2, and moves downward together, absorbs the most of impact energy of 9 times seats of valve disc, valve closing by back-moving spring 10.
Claims (5)
1. the high-pressure air safety valve of a supplementary load formula band buffering keying function, comprise valve body (1), valve seat (2), valve pocket (3), blind nut (4), pressure spring (6), spring base (7), valve disc (9), back-moving spring (10), described valve body (1) top connects blind nut (4), described valve body (1) lower end is provided with air inlet (A), side, middle part is provided with exhaust outlet (B), valve seat (2) upper end is provided with sealing surface, it is characterized in that: in described valve body (1) inlet end, connect floating type valve seat (2) by back-moving spring (10), floating type valve seat (2) is provided with valve disc (9) above, valve disc (9) connects pressure spring (6) by spring base (7) and forms dual spring floating sealing structure, for floating type valve seat (2) and valve disc (9) seal process, valve seat (2) moves with valve disc (9), absorb most of impact energy by back-moving spring (10), effectively avoid the sealing surface that opening-closing process causes to impact damaged, between described valve seat (2) and valve body (1), valve pocket (3) is housed, and valve pocket (3) middle part is connected with valve disc (9) slipper seal, side, valve pocket (3) middle part is provided with the venthole of the exhaust outlet (B) that is communicated with valve body (1), valve disc (9) side is provided with the venthole that is communicated with valve disc (9) lower end air inlet, between valve pocket (3) and valve seat (2), there is the gap that is communicated with the air admission hole of valve seat (2) and the air inlet (A) of valve body (1), valve seat (2) lower end is provided with convex shoulder, and the stepped hole matched in clearance of convex shoulder and valve pocket (3) lower end connects and composes the position limiting structure of valve seat motion, open moment for valve seat (2) and play position-limiting action, guarantee safety valve is opened reliably.
2. supplementary load formula band buffering according to claim 1 opens and closes the high-pressure air safety valve of function, it is characterized in that: described blind nut (4) top is threaded for regulating the pressure spring lid (5) of pressure spring (6) pressure.
3. supplementary load formula band buffering according to claim 1 opens and closes the high-pressure air safety valve of function, it is characterized in that: in the time that the opening pressure of high-pressure air safety valve described in the circulation medium pressure ratio in system is low, valve seat (2) is at back-moving spring (10) upwards under active force and the acting in conjunction of medium power, valve seat (2) upper end sealing surface is pressed on the induction port of valve disc (9), and the lower plane of valve disc (9) produces power upwards and pressure spring lid (5) compression pressure spring (6) and produces downward active force and balance each other.
4. supplementary load formula band buffering according to claim 1 opens and closes the high-pressure air safety valve of function, it is characterized in that: in the time that the pressure medium in system is increased to valve seat (2) starting pressure, described valve seat (2) moves upward together with valve disc (9), after pressure continues to increase, when valve seat (2) convex shoulder moves to the spacing place, stepped hole bottom surface of valve pocket (3), described valve seat (2) stop motion, valve disc (9) upwards continues motion, the valve open of high-pressure air safety valve, exhaust system pressure.
5. supplementary load formula band buffering according to claim 1 opens and closes the high-pressure air safety valve of function, it is characterized in that: in the time that the pressure medium in system is reduced to blow pressure, described valve disc (9) falls after rise and steadily contacts with the sealing surface on valve seat (2), and move downward together, absorb valve disc (9) by back-moving spring (10) and return the most of impact energy of seat, the valve closing of high-pressure air safety valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155177.8A CN105605254A (en) | 2016-03-18 | 2016-03-18 | Supplement load type high-pressure air safety valve with buffering on-off function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155177.8A CN105605254A (en) | 2016-03-18 | 2016-03-18 | Supplement load type high-pressure air safety valve with buffering on-off function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105605254A true CN105605254A (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610155177.8A Pending CN105605254A (en) | 2016-03-18 | 2016-03-18 | Supplement load type high-pressure air safety valve with buffering on-off function |
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| CN (1) | CN105605254A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2302379Y (en) * | 1997-04-25 | 1998-12-30 | 煤炭科学研究总院北京开采研究所 | Single-body hydraulic prop three-purpose valve |
| CN101324282A (en) * | 2008-07-24 | 2008-12-17 | 沈阳三三阀门科技有限公司 | High-pressure air safety valve |
| CN101672388A (en) * | 2009-09-28 | 2010-03-17 | 常州市汇丰船舶附件制造有限公司 | High-pressure pressure-reducing valve set |
| CN102444637A (en) * | 2011-09-27 | 2012-05-09 | 广西柳工机械股份有限公司 | Plug-in overflow valve |
| CN103090070A (en) * | 2011-11-02 | 2013-05-08 | 广西柳工机械股份有限公司 | Piloted type pressure reducing valve |
| CN104696561A (en) * | 2013-12-06 | 2015-06-10 | 利勃海尔机械布尔有限公司 | Pressure-limiting valve |
-
2016
- 2016-03-18 CN CN201610155177.8A patent/CN105605254A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2302379Y (en) * | 1997-04-25 | 1998-12-30 | 煤炭科学研究总院北京开采研究所 | Single-body hydraulic prop three-purpose valve |
| CN101324282A (en) * | 2008-07-24 | 2008-12-17 | 沈阳三三阀门科技有限公司 | High-pressure air safety valve |
| CN101672388A (en) * | 2009-09-28 | 2010-03-17 | 常州市汇丰船舶附件制造有限公司 | High-pressure pressure-reducing valve set |
| CN102444637A (en) * | 2011-09-27 | 2012-05-09 | 广西柳工机械股份有限公司 | Plug-in overflow valve |
| CN103090070A (en) * | 2011-11-02 | 2013-05-08 | 广西柳工机械股份有限公司 | Piloted type pressure reducing valve |
| CN104696561A (en) * | 2013-12-06 | 2015-06-10 | 利勃海尔机械布尔有限公司 | Pressure-limiting valve |
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Application publication date: 20160525 |
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| WD01 | Invention patent application deemed withdrawn after publication |