CN203297700U - Pilot operated safety valve - Google Patents
Pilot operated safety valve Download PDFInfo
- Publication number
- CN203297700U CN203297700U CN2013203348633U CN201320334863U CN203297700U CN 203297700 U CN203297700 U CN 203297700U CN 2013203348633 U CN2013203348633 U CN 2013203348633U CN 201320334863 U CN201320334863 U CN 201320334863U CN 203297700 U CN203297700 U CN 203297700U
- Authority
- CN
- China
- Prior art keywords
- valve
- main
- pilot
- main valve
- lower valve
- 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.)
- Withdrawn - After Issue
Links
Images
Landscapes
- Safety Valves (AREA)
Abstract
The utility model discloses a pilot operated safety valve. The pilot operated safety valve comprises a main valve and a pilot valve body. A main liquid inlet and a main liquid outlet are formed in the main valve. A main valve core is arranged in the main valve. An auxiliary liquid inlet and an auxiliary liquid outlet are formed in the pilot valve body. An air chamber is formed above the main valve core in the main valve. An liquid inlet pipe is arranged between the main liquid inlet in the main valve and the auxiliary liquid inlet in the pilot valve body, an air chamber pressure pipe is arranged between the auxiliary liquid outlet in the pilot valve body and the air chamber of the main valve, a valve core seat with a through hole is arranged in the main valve, a main sealing piece and a pressing plate are sequentially arranged at the bottom of the main valve core, the shape of the pressing plate is consistent with the shape of the through hole in the valve core seat, a guide sleeve is arranged in the main valve, a plurality of through holes are circumferentially formed in the bottom of the guide sleeve, the main valve core is arranged in the guide sleeve, and a main spring is arranged between the top of the main valve core in the air chamber and a valve body. The pilot operated safety valve can make the axis of the main valve seat and the axis of the main valve core be in a same straight line and then makes the main valve body be sealed.
Description
Technical field
The utility model relates to a kind of Pilot operated safety valve.
Background technique
Pilot operated safety valve is mainly used in the fields such as petroleum gas, chemical industry, electric power, metallurgy and gas, the time best overpressure protector on pressurized equipment, container or pipeline.Applicable media is pressurized air, water, lubricating oil and fuel oil.The action of pilot valve responding system pressure self, thus can realize safety valve unlatching or closing motion.Pilot operated safety valve is sensitive reliable because having, and good seal performance, be easy to obtain larger Lift, and simple in structure, safe and reliable advantage, be widely used.
Whether the sealing of Pilot operated safety valve main valve quality itself and pilot valve can normal operations, for the switch motion of control Pilot operated safety valve, are vital.But, in process of production, because valve body and guide sleeve add trade union, produce machining error, during assembling,, due to deviation accumulation, make sometimes the concentricity generation deviation of main valve plug and main valve seat, cause main valve situation about revealing to occur, cause safety valve not open under rated pressure.And, in general pilot valve, inlet ductwork is all directly to connect lower valve base, due to lower valve core and lower valve base Spielpassung, sometimes be mixed with impurity in medium, when this part medium passes through, have impurity and remain in lower valve core and lower valve base gap, cause the obstruction of pilot valve, make safety valve to work.In addition, when main valve was opened, the medium in the main valve air chamber need discharge after the air chamber pressure pipe is back to pilot valve, usually on pilot valve, a pipeline can be set and directly discharge, and the medium through pilot valve can constantly overflow like this, easily befouling environment.
The model utility content
Technical problem to be solved in the utility model is: thus provide a kind of axis of main valve seat and main valve plug that can make to guarantee the Pilot operated safety valve that main valve body seals on same straight line.
for solving the problems of the technologies described above, the technological scheme that the utility model adopts is: a kind of Pilot operated safety valve, comprise main valve and pilot valve, main valve is provided with main liquid entering hole and main liquid outlet, be provided with main valve plug in main valve, pilot valve is provided with auxiliary liquid entering hole and auxiliary liquid outlet, in main valve, the main valve plug top is provided with air chamber, be provided with liquid inlet pipe between auxiliary liquid entering hole on main liquid entering hole and pilot valve on main valve, be provided with the air chamber pressure pipe between auxiliary liquid outlet and main valve air chamber on pilot valve, be provided with the valve core case with through hole in described main valve, described main valve plug bottom is provided with primary seal sheet and pressing plate successively, the pressing plate profile is consistent with the valve core case shape of through holes, be provided with guide sleeve in described main valve, the guide sleeve bottom is circumferentially with some through holes, described main valve plug is arranged in guide sleeve, be provided with main spring between main valve plug top and valve body in described air chamber.
The further technical problem to be solved of the utility model is: a kind of not Pilot operated safety valve of external discharge medium befouling environment is provided.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is: described pilot valve is provided with back the liquid floss hole, is provided with the draining pipe that is communicated with both between the main liquid outlet that returns liquid floss hole and main valve of pilot valve.
as a kind of preferred scheme, described pilot valve comprises upper valve body and the lower valve body that links together, be movably equipped with valve rod in upper valve body, the upper valve body internal thread is connected with adjusting nut, valve stem tip passes adjusting nut, valve rod is provided with the spring fitting boss, pass through upper between adjusting nut and spring fitting boss, lower two spring seats are provided with upper spring, the valve rod bottom is provided with valve disc, be provided with lower valve base in lower valve body, described auxiliary liquid entering hole be located at lower valve base bottom and with the lower valve base intracavity inter-connection, be provided with lower valve core in lower valve base, lower valve core and lower valve base Spielpassung, the lower valve base top is provided with gland nut, be provided with the liquid opening in gland nut, auxiliary liquid outlet is connected with the liquid opening by the lower valve base inner chamber, the gland nut lower end is provided with auxiliary diaphragm seal, lower valve core top is provided with lower valve core bar, lower valve core bar passes from the liquid opening of gland nut, the inherent lower valve core of lower valve base below is provided with lower spring, lower valve body top is provided with the valve disc stacker that can be sealed and matched with valve disc, lower valve body and valve disc stacker are passed in lower valve core bar top, valve disc contacts with the lower valve core bar top.
As a kind of preferred scheme, form exhaust chamber between valve disc and valve disc stacker in upper valve body, exhaust chamber is connected with described time liquid floss hole, connects and is provided with the outage that is connected with exhaust chamber on described lower valve body and valve disc stacker, and described lower valve core bar top is passed from outage.
The further technical problem to be solved of the utility model is: provide a kind of pilot valve to be difficult for occurring the Pilot operated safety valve that stops up.
For solving the problems of the technologies described above, the technological scheme that the utility model adopts is: on described pilot valve, auxiliary liquid entering hole place is provided with filter, and described filter comprises filter body and filter cover.
The beneficial effects of the utility model are:, owing to being provided with guide sleeve, make the axis of main valve seat and guide sleeve, main valve plug on the same straight line, guarantee the sealing of main valve.
Be provided with the draining pipe that is communicated with both between the main liquid outlet that returns liquid floss hole and main valve due to pilot valve, while guaranteeing safety valve work, the medium of process pilot valve can not discharge sky, the cleaning of the valve outside Environmental Conditions that ensures safety.
Due to filter being installed, the medium that enters pilot valve is filtered, make pilot valve be difficult for stopping up.
Description of drawings
Fig. 1 is structural representation of the present utility model.
in Fig. 1: 1. main valve, 101. main liquid entering hole, 102. main liquid outlet, 103. main valve plug, 104. air chamber, 105. valve core case, 106. primary seal sheet, 107. pressing plate, 108. guide sleeve, 109. main spring, 2. pilot valve, 201. auxiliary liquid entering hole, 202. auxiliary liquid outlet, 203. upper valve body, 204. lower valve body, 205. valve rod, 206. adjusting nut, 207. spring fitting boss, 208. spring seat, 209. upper spring, 210. valve disc, 211. lower valve base, 212. lower valve core, 213. gland nut, 214. liquid opening, 215. auxiliary diaphragm seal, 216. lower valve core bar, 217. lower spring, 218. valve disc stacker, 219. exhaust chamber, 220. return the liquid floss hole, 221. draining pipe, 222. outage, 3. liquid inlet pipe, 4. air chamber pressure pipe, 5. filter, 51. filter body, 52. filter cover.
Embodiment
, below in conjunction with accompanying drawing, describe specific embodiments of the present utility model in detail.
as shown in Figure 1, a kind of Pilot operated safety valve, comprise main valve 1 and pilot valve 2, main valve 1 is provided with main liquid entering hole 101 and main liquid outlet 102, be provided with main valve plug 103 in main valve 1, pilot valve 2 is provided with auxiliary liquid entering hole 201 and auxiliary liquid outlet 202, the interior main valve plug of main valve 1 103 tops are provided with air chamber 104, on main valve 1 on main liquid entering hole 101 and pilot valve 2 201 of auxiliary liquid entering holes be provided with liquid inlet pipe 3, on pilot valve 2, auxiliary liquid outlet 202 and 104 of main valve 1 air chambers are provided with air chamber pressure pipe 4, be provided with the valve core case 105 with through hole in main valve 1, described main valve plug 103 bottoms are provided with primary seal sheet 106 and pressing plate 107 successively, pressing plate 107 profiles are consistent with valve core case 105 shape of through holes, be provided with guide sleeve 108 in described main valve 1, guide sleeve 108 bottoms are circumferentially with some through holes, described main valve plug 103 is arranged in guide sleeve 108, be provided with main spring 109 between described air chamber 104 interior main valve plug 103 tops and valve body.
pilot valve 2 comprises upper valve body 203 and the lower valve body 204 that links together, be movably equipped with valve rod 205 in upper valve body 203, upper valve body 203 internal threads are connected with adjusting nut 206, valve rod 205 tops pass adjusting nut 206, valve rod 205 is provided with spring fitting boss 207, pass through upper between adjusting nut 206 and spring fitting boss 207, lower two spring seats 208 are provided with upper spring 209, valve rod 205 bottoms are provided with valve disc 210, be provided with lower valve base 211 in lower valve body 204, auxiliary liquid entering hole 201 be located at lower valve base 211 bottoms and with lower valve base 211 intracavity inter-connections, be provided with lower valve core 212 in lower valve base 211, lower valve core 212 and lower valve base 211 Spielpassung, lower valve base 211 tops are provided with gland nut 213, be provided with liquid opening 214 in gland nut 213, auxiliary liquid outlet 202 is connected with liquid opening 214 by lower valve base 211 inner chambers, gland nut 213 lower ends are provided with auxiliary diaphragm seal 215, lower valve core 212 tops are provided with lower valve core bar 216, lower valve core bar 216 passes from the liquid opening 214 of gland nut 213, the inherent lower valve core of lower valve base 211 212 belows are provided with lower spring 217, lower valve body 204 tops are provided with the valve disc stacker 218 that can be sealed and matched with valve disc 210, form exhaust chamber 219 between the interior valve disc 210 of upper valve body 203 and valve disc stacker 218, be provided with back liquid floss hole 220 at exhaust chamber 219 places on upper valve body 203, return between the main liquid outlet 102 of liquid floss hole 220 and main valve 1 and be provided with the draining pipe 221 that is communicated with both.Connect and be provided with the outage 222 that is connected with exhaust chamber 219 on lower valve body 204 and valve disc stacker 218, lower valve core bar 216 tops are passed from outage 222, and valve disc 210 contacts with lower valve core bar 216 tops.
On pilot valve 2, auxiliary liquid entering hole 201 places are provided with filter 5, and filter 5 comprises filter body 51 and filter cover 52.
The Pilot operated safety valve at right angle setting, medium enters from main liquid entering hole 101, pass to the dome air chamber 104 at main valve 1 spool top by liquid inlet pipe 3, pilot valve 2 and air chamber pressure pipe 4, thereby produce a downward net effort on main valve plug 103, together with the pressure of main spring 109, make main valve 1 be in closed condition.
when system pressure reaches Set pressure, due to system pressure higher than upper spring 209 pressure, valve gap and lower valve core 212 in pilot valve 2 upwardly open under pressure, thereby make lower valve core 212 press the gas-entered passageway of the auxiliary diaphragm seal 215 sealing pilot valves 2 on gland nut 213, cut off fluid flowing in pilot valve, the pressure medium of main valve 1 air chamber 104 is by auxiliary liquid outlet 202, liquid opening 214, back to the fluid chamber, the liquid outlet place that is discharged into main valve 1 with time liquid floss hole 220 discharges, at this moment the pressure of main valve 1 air chamber 104 sharply descends, main valve plug 103 is opened fully, fluid flows out by the hole on guide sleeve 108 on main valve 1 step-down of releasing.
When hydrodynamic pressure drops to the certain pressure value, the spring force of pilot valve 2 upper springs 209 has overcome the power of auxiliary liquid entering hole 201 pressure-actings on lower valve core 212 and valve rod 205, pilot valve returns seat, valve rod 205 backs down lower valve core 212 downwards, make finally fluid reenter the dome air chamber 104 of main valve 1 through air chamber pressure pipe 4 from auxiliary liquid entering hole 201, lower valve base 211 inner chambers, auxiliary liquid outlet 202, close main valve 1.
The use checking of this Pilot operated safety valve process WATER AS FLOW MEDIUM etc., have good effect, solved valve body sealing surface generation leakage and impurity and stopped up the problem of pilot valve.
Claims (5)
1. Pilot operated safety valve, comprise main valve and pilot valve, main valve is provided with main liquid entering hole and main liquid outlet, be provided with main valve plug in main valve, pilot valve is provided with auxiliary liquid entering hole and auxiliary liquid outlet, in main valve, the main valve plug top is provided with air chamber, be provided with liquid inlet pipe between auxiliary liquid entering hole on main liquid entering hole and pilot valve on main valve, be provided with the air chamber pressure pipe between auxiliary liquid outlet and main valve air chamber on pilot valve, it is characterized in that: be provided with the valve core case with through hole in described main valve, described main valve plug bottom is provided with primary seal sheet and pressing plate successively, the pressing plate profile is consistent with the valve core case shape of through holes, be provided with guide sleeve in described main valve, the guide sleeve bottom is circumferentially with some through holes, described main valve plug is arranged in guide sleeve, be provided with main spring between main valve plug top and valve body in described air chamber.
2. a kind of Pilot operated safety valve as claimed in claim 1, it is characterized in that: described pilot valve is provided with back the liquid floss hole, is provided with the draining pipe that is communicated with both between the main liquid outlet that returns liquid floss hole and main valve of pilot valve.
3. a kind of Pilot operated safety valve as claimed in claim 2, it is characterized in that: described pilot valve comprises upper valve body and the lower valve body that links together, be movably equipped with valve rod in upper valve body, the upper valve body internal thread is connected with adjusting nut, valve stem tip passes adjusting nut, valve rod is provided with the spring fitting boss, pass through upper between adjusting nut and spring fitting boss, lower two spring seats are provided with upper spring, the valve rod bottom is provided with valve disc, be provided with lower valve base in lower valve body, described auxiliary liquid entering hole be located at lower valve base bottom and with the lower valve base intracavity inter-connection, be provided with lower valve core in lower valve base, lower valve core and lower valve base Spielpassung, the lower valve base top is provided with gland nut, be provided with the liquid opening in gland nut, auxiliary liquid outlet is connected with the liquid opening by the lower valve base inner chamber, the gland nut lower end is provided with auxiliary diaphragm seal, lower valve core top is provided with lower valve core bar, lower valve core bar passes from the liquid opening of gland nut, the inherent lower valve core of lower valve base below is provided with lower spring, lower valve body top is provided with the valve disc stacker that can be sealed and matched with valve disc, lower valve body and valve disc stacker are passed in lower valve core bar top, valve disc contacts with the lower valve core bar top.
4. a kind of Pilot operated safety valve as claimed in claim 3, it is characterized in that: form exhaust chamber between valve disc and valve disc stacker in upper valve body, exhaust chamber is connected with described time liquid floss hole, connect and be provided with the outage that is connected with exhaust chamber on described lower valve body and valve disc stacker, described lower valve core bar top is passed from outage.
5. a kind of Pilot operated safety valve as described in any one in claim 1-4, it is characterized in that: on described pilot valve, auxiliary liquid entering hole place is provided with filter, and described filter comprises filter body and filter cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203348633U CN203297700U (en) | 2013-06-09 | 2013-06-09 | Pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203348633U CN203297700U (en) | 2013-06-09 | 2013-06-09 | Pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203297700U true CN203297700U (en) | 2013-11-20 |
Family
ID=49573707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203348633U Withdrawn - After Issue CN203297700U (en) | 2013-06-09 | 2013-06-09 | Pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203297700U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277550A (en) * | 2013-06-09 | 2013-09-04 | 张家港沙洲船用阀门制造有限公司 | Pilot-operated type relief valve |
| CN105065738A (en) * | 2015-07-17 | 2015-11-18 | 永一阀门集团有限公司 | Adjustable-flow pilot-operated type safety valve with induction tube |
| CN105135015A (en) * | 2015-10-14 | 2015-12-09 | 开封市瑞发高中压阀门有限公司 | Pilot valve lower valve clack split-structure pilot operated safety valve |
| CN104455604B (en) * | 2014-11-05 | 2016-08-31 | 北京航天动力研究所 | A kind of high-voltage modulation type pilot operated safety valve |
| CN106439130A (en) * | 2016-11-17 | 2017-02-22 | 宋新建 | Pilot operated safety valve and inspection device thereof |
| CN106499851A (en) * | 2015-08-20 | 2017-03-15 | 北京航天石化技术装备工程有限公司 | A kind of all-metal sealing pilot operated safety valve |
-
2013
- 2013-06-09 CN CN2013203348633U patent/CN203297700U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277550A (en) * | 2013-06-09 | 2013-09-04 | 张家港沙洲船用阀门制造有限公司 | Pilot-operated type relief valve |
| CN104455604B (en) * | 2014-11-05 | 2016-08-31 | 北京航天动力研究所 | A kind of high-voltage modulation type pilot operated safety valve |
| CN105065738A (en) * | 2015-07-17 | 2015-11-18 | 永一阀门集团有限公司 | Adjustable-flow pilot-operated type safety valve with induction tube |
| CN106499851A (en) * | 2015-08-20 | 2017-03-15 | 北京航天石化技术装备工程有限公司 | A kind of all-metal sealing pilot operated safety valve |
| CN106499851B (en) * | 2015-08-20 | 2019-02-01 | 北京航天石化技术装备工程有限公司 | A kind of all-metal sealing pilot operated safety valve |
| CN105135015A (en) * | 2015-10-14 | 2015-12-09 | 开封市瑞发高中压阀门有限公司 | Pilot valve lower valve clack split-structure pilot operated safety valve |
| CN105135015B (en) * | 2015-10-14 | 2017-11-17 | 开封市瑞发高中压阀门有限公司 | Pilot valve lower Disc Split type structure pilot operated safety valve |
| CN106439130A (en) * | 2016-11-17 | 2017-02-22 | 宋新建 | Pilot operated safety valve and inspection device thereof |
| CN106439130B (en) * | 2016-11-17 | 2020-02-04 | 宋新建 | Inspection device for pilot operated safety valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203297700U (en) | Pilot operated safety valve | |
| CN112032377A (en) | Quick-response pilot operated safety valve and system overpressure quick protection method | |
| CN202901385U (en) | Stop valve with drain valve | |
| CN103277550B (en) | Pilot-operated type relief valve | |
| CN203098996U (en) | Filtering type pressure-reducing valve | |
| CN201628005U (en) | Pilot operated antifouling electromagnetic valve | |
| CN201973247U (en) | Endless belt type high-voltage explosion prevention electromagnetic valve | |
| CN201992149U (en) | Low-temperature safety valve | |
| CN218440002U (en) | Pilot-operated type leakage-free safety pressure valve | |
| CN201606503U (en) | Pilot electromagnetic valve | |
| CN204327992U (en) | A kind of explosion-proof guide electromagnetic valve | |
| CN203743548U (en) | Special pressure reducing and stabilizing valve for fire protection | |
| CN204083312U (en) | A kind of temperature-decreased pressure reducer improveing spool | |
| CN206246731U (en) | Three-way control valve | |
| CN202432012U (en) | Fast and anti-interference pilot valve | |
| CN204042151U (en) | A kind of speed closes stop valve | |
| CN205840852U (en) | Constant current open flow reducer after a kind of well fracturing | |
| CN202017805U (en) | Mechanical over-pressure/under-pressure protecting device for high pressure explosion-proof electromagnetic valve | |
| CN213685500U (en) | Float pilot-operated drain valve | |
| CN203413197U (en) | Self-reliance pilot-operated type flow control valve | |
| CN203906931U (en) | Pilot-operated type pressure reducing valve | |
| CN208919436U (en) | Throttling stop valve | |
| CN202220890U (en) | Pilot operated safety valve with manual opening mechanism | |
| CN112303248A (en) | Float pilot-operated drain valve | |
| CN205918974U (en) | Signal feedback direct -acting electromagnetic valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20131120 Effective date of abandoning: 20150408 |
|
| RGAV | Abandon patent right to avoid regrant |