CN205781142U - A kind of heavy-caliber pilot operated safety valve - Google Patents
A kind of heavy-caliber pilot operated safety valve Download PDFInfo
- Publication number
- CN205781142U CN205781142U CN201620447291.3U CN201620447291U CN205781142U CN 205781142 U CN205781142 U CN 205781142U CN 201620447291 U CN201620447291 U CN 201620447291U CN 205781142 U CN205781142 U CN 205781142U
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- main valve
- valve
- flap
- heavy
- fairlead
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Abstract
This utility model relates to a kind of heavy-caliber pilot operated safety valve, including main valve, pilot valve, described main valve includes valve body of main valve, the main valve being arranged on described valve body of main valve, the main valve fairlead being arranged on described valve body of main valve, the main valve flap being arranged in described main valve fairlead that can slide, described pilot valve is arranged on described valve body of main valve, being provided with lip-type packing between described main valve flap and main valve fairlead, both are sealed by this lip-type packing.This utility model is capable of discharge performance and performance is adjustable, both can meet client's demand to tolerance special media pilot operated safety valve, can meet again client to discharge capacity and the different demands of performance.
Description
Technical field
This utility model relates to a kind of valve, particularly relates to a kind of heavy-caliber pilot operated safety valve.
Background technology
Existing bigbore pilot operated safety valve main valve flap in the course of the work slides up and down in main valve fairlead,
The unlatching of control bound, discharge and return seat, thus decide the performance of main valve.Open, arrange, return the dynamic process of seat at valve
In, main valve flap is centering pilot in main valve fairlead, to keep sealing simultaneously, to correlated parts assembly precision and self
Required precision is the highest, owing to main valve flap sliding stroke is bigger so that main valve flap is frequent crooked jam when sliding, and causes
Main valve flap seals incessantly, and main valve anergy has some setbacks, and action is malfunctioning, valve invalidation, and user reflects that suggestion is bigger, badly influences
The Social benefit and economic benefit of valve manufacturing enterprise；Existing pilot operated safety valve uses RUBBER O type circle to seal,
For special operating mode, the pilot valve of rubber seal cannot meet harsher medium durability requirements, additionally, main valve flap
Contact with main valve fairlead when sliding, easily wear and tear.Therefore, above-mentioned technical problem needs solution badly.
Summary of the invention
The purpose of this utility model is to provide a kind of heavy-caliber pilot operated safety valve.
For reaching above-mentioned purpose, the technical solution adopted in the utility model is:
A kind of heavy-caliber pilot operated safety valve, including main valve, pilot valve, described main valve includes valve body of main valve, is arranged on institute
The main valve on valve body of main valve stated, the main valve fairlead being arranged on described valve body of main valve, being arranged on of can sliding
The described main valve flap in main valve fairlead, described pilot valve is arranged on described valve body of main valve, described main valve flap
And being provided with lip-type packing between main valve fairlead, both are sealed by this lip-type packing.
Preferably, the outer peripheral face of described main valve flap offering the first conduit, described lip-type packing is arranged on
In the first described conduit.
Preferably, being provided with guide ring between described main valve flap and main valve fairlead, described main valve flap passes through
Described guide ring is slide-and-guide in described main valve fairlead.
It is further preferred that offer the second conduit, described guiding on the outer peripheral face of described described main valve flap
Ring is arranged in the second described conduit.
It is further preferred that described lip-type packing is positioned at the top of described guide ring.
Preferably, the upper and lower sides of described main valve flap outer peripheral face has the overlay cladding of hard alloy.
Preferably, the lower surface of described main valve flap offers through hole plug screw.
Preferably, described lip-type packing includes the sealing ring of PTFE material, the spring of 316 stainless steels.
Operation principle of the present utility model is as follows:
When system pressure is less than the set-pressure of valve, pilot valve seat 20 seals closes, and system pressure is by main valve inlet warp
Crossing pilot valve and enter pilot valve air chamber and main valve air chamber, main valve gas indoor gas acts on main valve flap 13, makes main valve remain turned-off；
When system pressure increases up to set-pressure, pilot valve flap 21 overcomes pilot valve spring 22 under the effect of the pressure
Spring force moves upward, and makes sealing surface be in opening；Gas is higher than guiding valve cavity of resorption through pilot valve air chamber, guiding valve upper cavity pressure
Pressure, the pressure official post guiding valve piston 30 between guiding valve epicoele and guiding valve cavity of resorption is forced downwards, and guiding valve piston 30 drives sliding
Valve flap 31 moves down and makes sealing surface be in opening；Main valve gas fluid inside is by pilot valve seat 20 and pilot valve flap 21
Between space flow to Main valve outlet, main valve gas fluid inside flows to Main valve outlet, main valve air chamber by guiding valve sealing surface simultaneously
Pressure constantly reduces, and dynamic balance state is constantly revised, and makes main valve flap 13 move to accurate height, and keeps stable discharge
State；When system pressure reaches to discharge pressure, and main valve flap 13 reaches standard-sized sheet, it is achieved delivery；
When system pressure reduces, and pilot valve flap 21 and pilot valve seat 20 to seat next time, are led under the effect of pilot valve spring 22
Valve sealing surface is closed, and the guiding valve of pilot valve valve pocket cuts out, system pressure again by main valve flap 13 incoming main valve flap 13 above
Air chamber, when the pressure of air chamber increases to certain degree, the downward active force that main valve flap 13 is subject to is more than work upwards
Time firmly with frictional force sum, main valve is closed rapidly, returns to normal operating conditions.
Pilot valve arranges lower adjusting ring 23 and lets out process before adjusting discharge pressure and reducing, and upper adjusting ring 24 is used for adjusting opening
Close pressure reduction and Lift, by adjusting lower adjusting ring 23, just can adjust the size of pressure accumulation cavity area, thus control pressure accumulation chamber
Interior pressure, at this moment pressure accumulation intracavity power will overcome spring force, cause flap 21 to leave pilot valve seat 20, and valve kick is opened, logical
Cross adjustment and raise pitch circle 24, just can adjust the size of pressure accumulation area, thus control the pressure of pressure accumulation intracavity, just can adjust back
Seat pressure.
Owing to technique scheme is used, this utility model compared with prior art has the advantage that
This utility model is capable of discharge performance and performance is adjustable, both can meet client to tolerance special media first
The demand of conduction relief valve, can meet again client to discharge capacity and the different demands of performance.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the present embodiment；
Accompanying drawing 2 is A portion enlarged drawing in accompanying drawing 1；
Accompanying drawing 3 is B portion enlarged drawing in accompanying drawing 1；
Accompanying drawing 4 is C portion enlarged drawing in accompanying drawing 1.
Wherein: 10, valve body of main valve；11, main valve；12, main valve fairlead；13, main valve flap；130, the first conduit；
131, the second conduit；14, lip-type packing；15, guide ring；16, through hole plug screw；20, pilot valve seat；21, pilot valve flap；22、
Pilot valve spring；23, lower adjusting ring；24, upper adjusting ring；30, guiding valve piston；31, guiding valve flap.
Detailed description of the invention
Below in conjunction with the accompanying drawings and this utility model is further described by embodiment:
A kind of heavy-caliber pilot operated safety valve as shown in Figure 1, all connects including main valve, pilot valve and guiding valve, pilot valve and guiding valve
It is connected on main valve.Wherein: main valve includes valve body of main valve 10, the main valve 11 that is arranged on valve body of main valve 10, be arranged on main valve
Main valve fairlead 12 on valve body 10, the main valve flap 13 being arranged in main valve fairlead 12 that can slide.
In the present embodiment: as shown in Figure 2: offer the first conduit 130 on the outer peripheral face of main valve flap 13, at the first groove
Being provided with lip-type packing 14 in road 130, lip-type packing 14 uses sealing ring and the bullet of 316 stainless steels of PTFE material
Spring, it is achieved the slipper seal between main valve fairlead 12 and main valve flap 13, is possible not only to tolerate harsher work condition environment,
By pilot valve governor motion, performance can also be adjusted, meet the decay resistance to pilot operated safety valve and emission performance
Can be with the adjustable demand of performance.
As shown in Figure 3: on the outer peripheral face of main valve flap 13, offer the second conduit 131, it is provided with in the second conduit 131
Guide ring 15, it is achieved the slide-and-guide between main valve guide pin bushing 12 and main valve flap 13, keeps stable unlatching, discharges and returns seat.
First conduit 130 is opened in the top of the second conduit 131.
The upper and lower sides of main valve flap 13 outer peripheral face has an overlay cladding of hard alloy, reduces main valve flap 13 when sliding
Abrasion, can increase its wearability, increase its service life.
Offer through hole plug screw 16 on the lower surface of main valve flap 13, by regulation through hole plug screw 16, fluid can be controlled
Enter speed in main valve air chamber.
Above-described embodiment only for technology of the present utility model design and feature are described, its object is to allow and is familiar with technique
Personage will appreciate that content of the present utility model and implement according to this, protection domain of the present utility model can not be limited with this.
All according to this utility model spirit made equivalence change or modify, all should contain protection domain of the present utility model it
In.
Claims (6)
1. a heavy-caliber pilot operated safety valve, including main valve, pilot valve, described main valve include valve body of main valve, be arranged on described
Valve body of main valve on main valve, the main valve fairlead being arranged on described valve body of main valve, can slide be arranged on institute
Main valve flap in the main valve fairlead stated, described pilot valve is arranged on described valve body of main valve, it is characterised in that: described
Being provided with lip-type packing between main valve flap and main valve fairlead, both are sealed by this lip-type packing, described
Lip-type packing includes the sealing ring of PTFE material, the spring of 316 stainless steels；Described main valve flap and main valve fairlead
Between be provided with guide ring, described main valve flap is by described guide ring slide-and-guide in described main valve fairlead.
A kind of heavy-caliber pilot operated safety valve the most according to claim 1, it is characterised in that: outside described main valve flap
Offering the first conduit on side face, described lip-type packing is arranged in the first described conduit.
A kind of heavy-caliber pilot operated safety valve the most according to claim 1, it is characterised in that: described described main valve valve
Offering the second conduit on the outer peripheral face of lobe, described guide ring is arranged in the second described conduit.
A kind of heavy-caliber pilot operated safety valve the most according to claim 1, it is characterised in that: described lip-type packing position
Top in described guide ring.
A kind of heavy-caliber pilot operated safety valve the most according to claim 1, it is characterised in that: described main valve flap periphery
The upper and lower sides in face has the overlay cladding of hard alloy.
A kind of heavy-caliber pilot operated safety valve the most according to claim 1, it is characterised in that: under described main valve flap
Through hole plug screw is offered on surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447291.3U CN205781142U (en) | 2016-05-17 | 2016-05-17 | A kind of heavy-caliber pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620447291.3U CN205781142U (en) | 2016-05-17 | 2016-05-17 | A kind of heavy-caliber pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205781142U true CN205781142U (en) | 2016-12-07 |
Family
ID=58118957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620447291.3U Active CN205781142U (en) | 2016-05-17 | 2016-05-17 | A kind of heavy-caliber pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205781142U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030412A (en) * | 2019-03-08 | 2019-07-19 | 哈电集团哈尔滨电站阀门有限公司 | A kind of heavy caliber multistage pilot operated safety valve |
| CN113606369A (en) * | 2021-07-21 | 2021-11-05 | 哈电集团哈尔滨电站阀门有限公司 | Pilot-operated safety valve with novel structure and use method |
-
2016
- 2016-05-17 CN CN201620447291.3U patent/CN205781142U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030412A (en) * | 2019-03-08 | 2019-07-19 | 哈电集团哈尔滨电站阀门有限公司 | A kind of heavy caliber multistage pilot operated safety valve |
| CN113606369A (en) * | 2021-07-21 | 2021-11-05 | 哈电集团哈尔滨电站阀门有限公司 | Pilot-operated safety valve with novel structure and use method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |