CN201687999U - Pilot operated safety valve - Google Patents
Pilot operated safety valve Download PDFInfo
- Publication number
- CN201687999U CN201687999U CN2010202073216U CN201020207321U CN201687999U CN 201687999 U CN201687999 U CN 201687999U CN 2010202073216 U CN2010202073216 U CN 2010202073216U CN 201020207321 U CN201020207321 U CN 201020207321U CN 201687999 U CN201687999 U CN 201687999U
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- Prior art keywords
- valve
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- flap
- control valve
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- 230000008676 import Effects 0.000 claims description 10
- 239000011148 porous material Substances 0.000 abstract 2
- 238000007789 sealing Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 210000003660 reticulum Anatomy 0.000 description 3
- 241000220317 Rosa Species 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model discloses a pilot operated safety valve, which comprises a main valve and a pilot valve assembly, an inlet and an outlet are arranged on a valve body of the main valve, a main valve cover is mounted on the a valve body end surface relative to a main valve flap, a main valve pressure cavity is formed between the main valve flap and the main valve cover; the pilot valve assembly comprises a pilot valve and a control valve, a pilot valve flap and a pilot valve base are positioned in a pilot valve cavity, a control valve is positioned in the pilot valve body, the control valve flap and the control valve base are positioned in the control valve cavity, a linkage small shaft is arranged between the control valve flap and the pilot valve flap, the pilot valve and the control valve are mounted on the main valve cover, inlet pressure pore passages for communicating the main valve inlet with the lower part of the control valve cavity are in turn arranged in the main valve flap, the spacing block, a main valve cover and the control valve body, air chamber pressure pore passages for communicating the upper part of the control valve cavity and the main valve pressure cavity are in turn arranged on the pilot valve body and the main valve cover. The pilot operated safety valve has no need for being provided with a conduit tube, thereby avoiding the pipe joint leakage caused by the improper operation.
Description
Technical field
The utility model relates to a kind of safety valve, particularly a kind of Pilot operated safety valve.
Background technique
Pilot operated safety valve is a kind of non-direct-operated relief valve, because the requirement of operating mode and the special circumstances such as permission of manufacturing, Pilot operated safety valve can not be replaced by other safety valve, is widely used on industry equipments such as oil, chemical industry.Compare Pilot operated safety valve with Direct spring loaded safety valve and have following characteristics: (1) can very have good sealing property near under the cracking pressure; (2) sealing is reliably easy to maintenance; (3) action of valve is not subjected to the influence of counterpressure; (4) can set the cracking pressure of valve at work, be easy to regulate; (5) discharge capacity is big, and bore is big; (6) pressure can be accomplished very high.
As shown in Figure 1, Pilot operated safety valve of the prior art comprises main valve 1 and guide valve component, the valve body of main valve is provided with import and outlet, be provided with main valve flap, main spool spring and main valve valve seat in the valve body, the valve body end face relative with the main valve flap is provided with the main valve valve gap, constitute the main valve pressure chamber between main valve flap and the main valve valve gap, the tension force of main spool spring drops on the main valve valve seat main valve flap; Guide valve component comprises pilot valve 4 and control valve 2, pilot valve comprises pilot valve valve body, pilot valve flap and pilot valve seat, pilot valve flap and pilot valve seat are arranged in the pilot valve valve pocket, outlet pipe is installed on the pilot valve valve body to communicate with the pilot valve valve pocket, control valve is positioned at the pilot valve valve body, comprise control valve valve body, control valve valve seat, control valve flap, control valve valve seat, control valve flap are arranged in the control valve valve pocket, bleed valve is installed on the pilot valve valve body communicates with the control valve valve pocket.The control valve flap comprises flap and control valve lower Disc on the control valve, flap is nested in the control valve lower Disc on the control valve, be provided with the lower Disc seal ring outside the lower end surface of control valve lower Disc, the circumference of flap is provided with the flap seal ring on the control valve, is provided with the little axle of interlock on the control valve between flap and the pilot valve flap.Valve body of main valve is installed into mouth pressure pipe 7 ', air chamber pressure pipe 8 ' outward, and inlet pressure pipe 7 ' one end connects the main valve import, and the other end connects the bottom of control valve valve pocket; Air chamber pressure pipe 8 ' one end is communicated with the main valve pressure chamber, and the other end is communicated with the top of control valve valve pocket.
The keying of main valve is the media drive control that relies on guide valve component to discharge.When system pressure is lower than the setting pressure of safety valve, flap and control valve lower Disc are in the middle part of control valve valve pocket on the control valve, the medium of main valve inlet enters the control valve valve pocket by the inlet pressure pipe, enter the main valve pressure chamber by the control valve valve pocket by the air chamber pressure pipe again, on the main valve flap, produce sealing force, main valve is closed.
When pipe medium pressure increased near setting pressure, the control valve flap rose, and last flap seal ring is pressed on the control valve valve seat, closes the passage of MEDIA FLOW to the main valve pressure chamber, and at this moment, the main valve sealing still is in a safe condition.System pressure continues to have slightly increase, under the interlock of little axle, the pilot valve flap is opened, the medium of main valve pressure chamber is discharged by the outlet pipe that is communicated with the pilot valve valve pocket, pressure in the main valve pressure chamber descends, the main valve flap is opened rapidly under the effect of pressure medium, and the medium in the pipeline is discharged from the main valve outlet is a large amount of.
When system pressure dropped to the valve Reseating pressure of a safety valve, under the effect of pilot valve spring, the pilot valve flap descended, and pilot valve cuts out.Under the interlock of little axle, the control valve flap descends simultaneously, and last flap seal ring breaks away from the control valve valve seat, and last sealing disappears, and medium enters the main valve pressure chamber by the control valve valve pocket by the air chamber pressure pipe, and the main valve flap recovers the main valve sealing under the effect of medium power.
There is following shortcoming in this Pilot operated safety valve: inlet pressure pipe and air chamber pressure pipe are arranged on the valve body outside, be connected with valve body by pipe joint, in installation process, operator often grip inlet pressure pipe or air chamber pressure pipe as handle, catch inlet pressure pipe or air chamber pressure pipe carrying safety valve, even, be easy to cause pipe joint to leak as the hanger lifting, leak relatively difficulty and handle inlet pressure pipe or air chamber pressure pipe at the construction field (site), cause safety valve to lose efficacy.
The model utility content
For solving in the prior art, the inlet pressure pipe of safety valve or air chamber pressure pipe be the problem of leakage easily, and the utility model provides a kind of Pilot operated safety valve, need not to be provided with outside valve body inlet pressure pipe or air chamber pressure pipe, has reduced leakage point.
For solving above technical problem, a kind of Pilot operated safety valve provided by the utility model, comprise main valve and guide valve component, the valve body of described main valve is provided with import and outlet, be provided with main valve flap, main spool spring, limiting stopper and main valve valve seat in the valve body, on the valve body end face relative with described main valve flap the main valve valve gap is installed, constitutes the main valve pressure chamber between described main valve flap and the main valve valve gap, the two ends of described limiting stopper lay respectively at main valve flap and main valve valve gap in opposite directions in the groove of end face; Described guide valve component comprises pilot valve and control valve, described pilot valve comprises the pilot valve valve body, pilot valve flap and pilot valve seat, described pilot valve flap and pilot valve seat are arranged in the pilot valve valve pocket, the outlet pipe that communicates with described pilot valve valve pocket is installed on the described pilot valve valve body, described control valve is positioned at described pilot valve valve body, comprise the control valve valve body, control valve flap and control valve valve seat, described control valve flap, the control valve valve seat is arranged in the control valve valve pocket, the bleed valve that communicates with described control valve valve pocket is installed on the described pilot valve valve body, be provided with the little axle of interlock between described control valve flap and the described pilot valve flap, described pilot valve and control valve are installed on the described main valve valve gap, described main valve flap, limiting stopper, the main valve valve gap, be provided with the inlet pressure duct that the bottom with main valve import and described control valve valve pocket connects in the control valve valve body successively, be provided with the air chamber pressure duct that top and described main valve pressure chamber with the control valve valve pocket connect on described pilot valve valve body and the main valve valve gap successively.
With respect to prior art, the utility model has been obtained following beneficial effect: when system pressure is lower than the setting pressure of safety valve, the control valve flap is in the middle part of control valve valve pocket, the pressure medium of main valve inlet arrives the control valve valve pocket by the inlet pressure duct, enter the main valve pressure chamber by the control valve valve pocket again, on the main valve flap, produce sealing force, main valve is closed; When pipe medium pressure arrives setting pressure, the control valve flap rises, MEDIA FLOW is closed to the air chamber pressure duct of main valve pressure chamber, under the interlock of little axle, the pilot valve flap is opened, and the medium of main valve pressure chamber is discharged by the outlet pipe that is communicated with the pilot valve valve pocket, and the pressure in the main valve pressure chamber descends, the main valve flap is opened rapidly under the effect of pressure medium, and the medium in the pipeline is discharged from the main valve outlet is a large amount of; This Pilot operated safety valve need not at valve body arranged outside inlet pressure pipe or air chamber pressure pipe, has avoided in installation process because workman's misoperation causes pipe joint to leak.
Description of drawings
Fig. 1 is the structural representation of Pilot operated safety valve in the prior art.
Fig. 2 is the plan view of the utility model Pilot operated safety valve.
Fig. 3 is the enlarged view of A portion among Fig. 2.
Among the figure: 101 valve body of main valve, 7 ' inlet pressure pipe, 8 ' air chamber pressure pipe, 102 main valve flaps, 103 main valve guide sleeves, 104 limiting stoppers, 105 main spool springs, 106 main valve valve gaps, 107 imports, 108 outlets, 2 control valves, 201 control valve valve bodies, 202 control valve valve seats, flap on 203 control valves, 204 control valve lower Discs, flap seal ring on 205,206 lower Disc seal rings, 3 bleed valves, 4 pilot valves, 401 pilot valve seat, 402 pilot valve flaps, 403 pilot valve guide sleeves, 404 pilot valve spring seats, 405 pilot valve adjusting screw rods, 406 nuts, 407 pilot valve springs, 408 pilot valve bonnets, 409 pilot valve bottom flanges, 410 pilot valve valve bodies, 5 little axles, 6 outlet pipes, 7 inlet pressure ducts, 8 air chamber pressure ducts.
Embodiment
As shown in Figures 2 and 3, Pilot operated safety valve of the present utility model comprises main valve 1 and guide valve component, valve body of main valve 101 is provided with import 107 and exports 108, be provided with main valve flap 102, main valve guide sleeve 103, limiting stopper 104 and main spool spring 105 in the valve body, the valve body end face relative with main valve flap 102 is provided with main valve valve gap 106, constitute the main valve pressure chamber between main valve flap 102 and the main valve valve gap 106, the tension force of main spool spring 105 drops on the main valve valve seat main valve flap 102.
Guide valve component comprises pilot valve 4 and control valve 2, pilot valve comprises pilot valve valve body 410 and the pilot valve bonnet 408, the pilot valve bottom flange 409 that fasten mutually, pilot valve flap 402, pilot valve seat 401 and pilot valve guide sleeve 403 are arranged in pilot valve valve body 410, be provided with pilot valve spring seat 404, pilot valve adjusting screw rod 405, nut 406 and pilot valve spring 407 in pilot valve bonnet 408 and the pilot valve bottom flange 409, adjust pilot valve adjusting screw rod 405 according to the opening pressure of safety valve needs and make pilot valve spring 407 compressions or lax, after adjusting to the right place, nut 406 is with 405 lockings of pilot valve adjusting screw rod.Pilot valve flap 402 and pilot valve seat 401 are arranged in the pilot valve valve pocket, and the outlet pipe 6 that communicates with the pilot valve valve pocket is installed on the pilot valve valve body 410.
Control valve is positioned at pilot valve valve body 410, comprises control valve valve body 201, control valve valve seat 202, control valve flap, and control valve valve seat 202, control valve flap are arranged in the control valve valve pocket, and the bleed valve 3 that communicates with the control valve valve pocket is installed on the pilot valve valve body.The control valve flap comprises flap 203 and control valve lower Disc 204 on the control valve, flap 203 is nested in the control valve lower Disc 204 on the control valve, be provided with lower Disc seal ring 206 outside the lower end surface of control valve lower Disc 204, the circumference of flap 203 is provided with flap seal ring 205 on the control valve, is provided with the little axle 5 of interlock on the control valve between flap 203 and the pilot valve flap 402.Pilot valve and control valve are installed on the main valve valve gap 106, be provided with the inlet pressure duct 7 that the bottom with main valve import 107 and control valve valve pocket connects in main valve flap 102, limiting stopper 104, main valve valve gap 106, the control valve valve body 201 successively, be provided with successively on pilot valve valve body and the main valve valve gap 106 top of control valve valve pocket and the air chamber pressure duct 8 of main valve pressure chamber perforation.
The keying of main valve is the media drive control that relies on guide valve component to discharge.When system pressure is lower than the setting pressure of safety valve, flap 203 and control valve lower Disc 204 are in the middle part of control valve valve pocket on the control valve, the medium at main valve import 107 places enters the control valve valve pocket by inlet pressure duct 7, enter the main valve pressure chamber by the control valve valve pocket by air chamber pressure duct 8 again, on main valve flap 102, produce sealing force, main valve is closed.
When pipe medium pressure increased near safety valve setting pressure, the control valve flap rose, and last flap seal ring 205 is pressed on the control valve valve seat 202, closes the passage of MEDIA FLOW to the main valve pressure chamber, and at this moment, the main valve sealing still is in a safe condition.System pressure continues to have slightly increase, under the interlock of little axle 5, pilot valve flap 402 is opened, the medium of main valve pressure chamber is discharged by the outlet pipe 6 that is communicated with the pilot valve valve pocket, pressure in the main valve pressure chamber descends, main valve flap 102 is opened rapidly under the effect of pressure medium, and the medium in the pipeline is discharged in a large number from main valve outlet 108.
When system pressure dropped to blowdown pressure of safety valve, under the effect of pilot valve spring 407, pilot valve flap 402 descended, and pilot valve cuts out.Under the interlock of little axle 5, the control valve flap descends simultaneously, and last flap seal ring 205 breaks away from control valve valve seat 202, and last sealing disappears, and medium enters the main valve pressure chamber by the control valve valve pocket, and main valve flap 102 recovers the main valve sealing under the effect of medium power.
In addition to the implementation, the utility model can also have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, all fall into the protection domain of the utility model requirement.
Claims (1)
1. Pilot operated safety valve, comprise main valve and guide valve component, the valve body of described main valve is provided with import and outlet, be provided with main valve flap, main spool spring, limiting stopper and main valve valve seat in the valve body, on the valve body end face relative the main valve valve gap is installed with described main valve flap, constitute the main valve pressure chamber between described main valve flap and the main valve valve gap, the two ends of described limiting stopper lay respectively at main valve flap and main valve valve gap in opposite directions in the groove of end face; Described guide valve component comprises pilot valve and control valve, described pilot valve comprises the pilot valve valve body, pilot valve flap and pilot valve seat, described pilot valve flap and pilot valve seat are arranged in the pilot valve valve pocket, the outlet pipe that communicates with described pilot valve valve pocket is installed on the described pilot valve valve body, described control valve is positioned at described pilot valve valve body, comprise the control valve valve body, control valve flap and control valve valve seat, described control valve flap, the control valve valve seat is arranged in the control valve valve pocket, the bleed valve that communicates with described control valve valve pocket is installed on the described pilot valve valve body, be provided with the little axle of interlock between described control valve flap and the described pilot valve flap, it is characterized in that, described pilot valve and control valve are installed on the described main valve valve gap, described main valve flap, limiting stopper, the main valve valve gap, be provided with the inlet pressure duct that the bottom with main valve import and described control valve valve pocket connects in the control valve valve body successively, be provided with the air chamber pressure duct that top and described main valve pressure chamber with the control valve valve pocket connect on described pilot valve valve body and the main valve valve gap successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202073216U CN201687999U (en) | 2010-05-28 | 2010-05-28 | Pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202073216U CN201687999U (en) | 2010-05-28 | 2010-05-28 | Pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201687999U true CN201687999U (en) | 2010-12-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202073216U Expired - Fee Related CN201687999U (en) | 2010-05-28 | 2010-05-28 | Pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201687999U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313052A (en) * | 2011-08-17 | 2012-01-11 | 永一阀门集团有限公司 | Built-in pilot operated safety valve |
| CN102927338A (en) * | 2012-11-19 | 2013-02-13 | 福建高中压阀门科技有限公司 | Inlet/outlet throttling pressure differential self-powered opening-closing device and application thereof |
| CN102937200A (en) * | 2012-11-19 | 2013-02-20 | 福建高中压阀门科技有限公司 | Direct-flow piston type adjustable pressure release valve and use method thereof |
| CN103851238A (en) * | 2014-02-18 | 2014-06-11 | 永一阀门集团有限公司 | Vacuum backflow prevention 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 |
| CN107269894A (en) * | 2017-07-27 | 2017-10-20 | 南京德沃克自动化有限公司 | The blender of fire-fighting foam solution extinguishing chemical |
| CN110145621A (en) * | 2019-05-08 | 2019-08-20 | 承德高中压阀门管件集团有限公司 | A kind of pilot operated safety valve |
-
2010
- 2010-05-28 CN CN2010202073216U patent/CN201687999U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313052A (en) * | 2011-08-17 | 2012-01-11 | 永一阀门集团有限公司 | Built-in pilot operated safety valve |
| CN102927338A (en) * | 2012-11-19 | 2013-02-13 | 福建高中压阀门科技有限公司 | Inlet/outlet throttling pressure differential self-powered opening-closing device and application thereof |
| CN102937200A (en) * | 2012-11-19 | 2013-02-20 | 福建高中压阀门科技有限公司 | Direct-flow piston type adjustable pressure release valve and use method thereof |
| CN103851238A (en) * | 2014-02-18 | 2014-06-11 | 永一阀门集团有限公司 | Vacuum backflow prevention 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 |
| CN107269894A (en) * | 2017-07-27 | 2017-10-20 | 南京德沃克自动化有限公司 | The blender of fire-fighting foam solution extinguishing chemical |
| CN110145621A (en) * | 2019-05-08 | 2019-08-20 | 承德高中压阀门管件集团有限公司 | A kind of pilot operated safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: TIANZHENG VALVE CO., LTD. Free format text: FORMER OWNER: XU WENXIAN Effective date: 20120611 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 225008 YANGZHOU, JIANGSU PROVINCE TO: 325105 WENZHOU, ZHEJIANG PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120611 Address after: Fort Wenzhou Oubei town of Zhejiang province 325105 City Industrial Street No. 109 Patentee after: Tianzheng Valve Co., Ltd. Address before: 225008 Friendship Road 218, Weiyang District, Jiangsu, Yangzhou Patentee before: Xu Wenxian |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20190528 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |