CN202220890U - Pilot operated safety valve with manual opening mechanism - Google Patents
Pilot operated safety valve with manual opening mechanism Download PDFInfo
- Publication number
- CN202220890U CN202220890U CN2011203148341U CN201120314834U CN202220890U CN 202220890 U CN202220890 U CN 202220890U CN 2011203148341 U CN2011203148341 U CN 2011203148341U CN 201120314834 U CN201120314834 U CN 201120314834U CN 202220890 U CN202220890 U CN 202220890U
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- Prior art keywords
- valve
- pilot
- main
- guide
- pilot valve
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- Expired - Lifetime
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Abstract
The utility model belongs to the overpressure protection technique for a pressure system and particularly discloses a pilot operated safety valve with a manual opening mechanism. The pilot operated safety valve comprises a main valve and a guide valve; a main valve clack is arranged in the main valve; the guide valve comprises a guide valve body, a valve cap, a valve cover and the like; the guide valve body is connected with the main valve through a pressure pipe, so that the interior of the guide valve body is communicated with a main valve air chamber through the pressure pipe; a cavity formed by the guide valve body, the valve cover and the valve cap is internally provided with a guide valve shaft and a guide valve spring; the top end of the guide valve shaft is fixed with a guide valve subplate; a guide valve rod is horizontally arranged in the upper end of the valve cap; a guide valve shift fork is arranged outside the guide valve rod; the swing end of the guide valve shift fork is located below the guide valve subplate; therefore, the opening mechanism comprising the guide valve shift fork, the guide valve rod, a guide valve wrench and the like is formed, the opening and the closing of the guide valve can be manually controlled effectively, so that the pressure of the main valve air chamber is controlled, the opening and the closing of the main valve are controlled, and the problems that the current regular pilot operated safety valve cannot be opened or closed manually and cannot relief pressure emergently are solved.
Description
Technical field
The utility model belongs to pressure system overpressure protection technology, is specifically related to a kind of Pilot operated safety valve.
Background technique
Pilot operated safety valve is specially adapted to the compact place application in high back pressure, big flow, high pressure and mounting point, and its main valve just can reach full open, and be swift in motion under very little superpressure situation.Compare conventional safety valve; Have the following advantages: permissible working pressure is near the Set pressure of safety valve; The valve seat soft seal guarantees the excellent sealing property before and after the safety valve jumping up, and performance of safety valve and Lift do not receive the influence of back pressure, and less superpressure just can make main valve reach rapidly and open state entirely.
Therefore in the relatively harsher occasion of service conditions such as oil, chemical industry, power station, metallurgy, nuclear power, Pilot operated safety valve becomes the first-selected overpressure protector on the pressurized equipment such as all kinds of boilers, pressurized container and pressure piping.
But Pilot operated safety valve is a kind of non-direct-operated relief valve, is made up of the structure more complicated a main valve and pilot valve; When rolling off the production line maintenance; Dismounting and transportation process are damaged this body structure easily, therefore hope enough lifting spanners to be mentioned from valve seat by flap slightly for the good Pilot operated safety valve of on-line operation; Realize artificial online opening and closing, with the flexibility of inspection Pilot operated safety valve unlatching.
In addition,,, need to increase the function of artificial emergency relief as when air, hot water and the water vapor operating mode for some special operation conditions, the safety of protection pipeline, existing Pilot operated safety valve do not have artificial online unlatching, close and function such as emergency relief.
Summary of the invention
The purpose of the utility model is to provide a kind of Pilot operated safety valve with manually opened mechanism, makes Pilot operated safety valve have artificial online unlatching, close and the emergency relief function, and application area is more extensive.
The technological scheme of the utility model is following:
A kind of Pilot operated safety valve with manually opened mechanism, it comprises main valve and pilot valve, is provided with the main valve flap in the main valve, forms the main valve air chamber in the said main valve flap; Described pilot valve comprises the pilot valve valve body, and said pilot valve valve body is provided with the valve gap joint, is installed with valve gap through the valve gap joint, and said valve gap upper fixed is provided with bonnet; Said pilot valve valve body links to each other with main valve respectively through pressure tube, makes in the pilot valve valve body to communicate with the main valve air chamber through pressure tube; In the formed chamber of pilot valve valve body, valve gap and bonnet, be provided with the pilot valve valve shaft; In said valve gap, pilot valve valve shaft middle part is set with the pilot valve spring; Wherein: said pilot valve valve shaft top is fixed with the pilot valve backing plate; And level is provided with pilot stem in the upper end of said bonnet, and this pilot stem is provided with the pilot valve shift fork outward, and the swinging end of pilot valve shift fork is positioned at pilot valve backing plate below.
In above-mentioned Pilot operated safety valve with manually opened mechanism: an end of described pilot stem is positioned at outside the pilot valve cap, and is fixed with the pilot valve spanner on this end.
In above-mentioned Pilot operated safety valve: outside the said pilot valve valve shaft, pilot valve spring below is provided with pilot valve seat and pilot valve trim ring with manually opened mechanism.
In above-mentioned Pilot operated safety valve: be provided with valve seat insert outside the said pilot valve valve shaft with manually opened mechanism.
The beneficial effect of the utility model is: through the opening mechanism of forming at pilot valve design pilot valve shift fork, pilot stem and the pilot valve spanner etc. of existing Pilot operated safety valve; Realized artificial to pilot valve opening and closing effectively control; Thereby control main valve air chamber pressure; The opening and closing of control main valve have solved present conventional Pilot operated safety valve and have not had problems such as artificial open and close and emergency relief.
Description of drawings
The Pilot operated safety valve schematic representation that Fig. 1 provides for the utility model with manually opened mechanism;
Fig. 2 is the pilot valve structural representation;
Fig. 3 is the A-A sectional view of Fig. 2;
Among the figure: 1. main valve; 2. pilot valve; 3. main valve air chamber; 4. main valve flap; 5. pilot valve valve body; 6. pilot valve spring 7. pilot valve seat; 8. pilot valve trim ring; 9. pilot valve valve shaft; 10 pilot valve shift forks; 11. pilot stem; 12. pilot valve spanner; 13. pilot valve backing plate; 14. valve seat insert; 15. pilot valve pressure relief opening; 16. bonnet; 17. valve gap; 18. valve gap joint.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is done further explain.
As shown in Figure 1; In main valve 1 internal fixation main valve flap 4 is installed; Make and form main valve air chambers 3 in the main valve flap 4, be processed with opening at the upper surface of main valve 1, the lower end of main valve 1 is provided with the main valve inlet; A side is installed with pilot valve 2 in the upper end of main valve 1, and this pilot valve 2 links to each other with opening with the main valve inlet respectively through pressure tube.
The structure of pilot valve 2 as shown in Figures 2 and 3, it comprises the pilot valve valve body 5 of lower end, and valve gap joint 18 is installed on pilot valve valve body 5, this valve gap joint 18 is fixedly connected with valve gap 17 on it through screw thread, on valve gap 17, passes through screw thread fixed connection bonnet 16 again.
A side has pilot valve pressure relief opening 15 in the lower end of described pilot valve valve body 5; Pilot valve valve shaft 9 is installed in pilot valve valve body 5, valve gap 17 and bonnet 16 formed chambeies, being provided with; And pilot valve valve body 5 lower end setting pressure pipes make in the pilot valve valve body 5 to communicate with main valve air chamber 3 through pressure tube.In valve gap 17, the middle part of pilot valve valve shaft 9 is set with pilot valve spring 6, the top of pilot valve valve shaft 9 is equipped with pilot valve backing plate 13 through screw thread.Be horizontally installed with pilot stem 11 in the upper end of bonnet 16, be set with pilot valve shift fork 10 outside this pilot stem 11, and the position of swing one end of pilot valve shift fork 10 be lower than pilot valve backing plate 13.Convenient for pilot stem 11 is rotated, in the perforate of the upper end of bonnet 16, make an end of pilot stem 11 reach outside the bonnet 16, and pilot valve spanner 12 is installed at external part through this hole.
Outside pilot valve valve shaft 9, below the pilot valve spring 6, be set with pilot valve seat 7; Above this pilot valve seat 7, pilot valve trim ring 8 is installed; Between pilot valve seat 7 and the pilot valve trim ring 8 valve seat insert 14 has been installed; Promptly guarantee the sealing between pilot valve seat 7 and the pilot valve trim ring 8, guaranteed the sealing between pilot valve valve shaft 9 and the pilot valve trim ring 8 again.
Working procedure: when system's proper functioning; Pilot valve valve shaft 9 compresses valve seat insert 14, makes pilot valve be in closed condition, and system pressure gets into main valve air chamber 3 by main valve 1 inlet through the pilot valve 2 with manually opened mechanism; Act on the main valve flap 4, main valve 1 is kept shut.
When promoting pilot valve spanner 12, drive pilot stem 11 and rotate, pilot stem drives pilot valve shift fork 10 and upwards rotates; The pilot valve shift fork 10 tops contact pilot valve backing plate 13 and the jack-up pilot valve backing plate 13 that makes progress; Pilot valve backing plate 13 is threaded with pilot valve valve shaft 9 usefulness, and pilot valve backing plate 13 drives pilot valve valve shaft 9 and moves up, and pilot valve is opened; The main valve air chamber is through the 15 beginning pressure releases of pilot valve pressure relief opening, and main valve is opened.
When putting down pilot valve spanner 12, drive pilot stem 11 and rotate, pilot stem drives pilot valve shift fork 10 and rotates, and pilot valve shift fork 10 tops break away from pilot valve backing plate 13; Under the effect of pilot valve spring 6, pilot valve valve shaft 9 moves down, and compresses valve seat insert 14; Pilot valve cuts out, and makes the main valve air chamber stop 15 pressure releases of pilot valve pressure relief opening, simultaneously; System pressure gets into main valve air chamber 3 by main valve 1 inlet through the pilot valve 2 with manually opened mechanism, acts on the main valve flap 4, and main valve 1 is closed.
Claims (4)
1. Pilot operated safety valve with manually opened mechanism, it comprises main valve (1) and pilot valve (2), is provided with main valve flap (4) in the main valve (1), forms main valve air chamber (3) in the said main valve flap (4); Described pilot valve (2) comprises pilot valve valve body (5), and said pilot valve valve body (5) is provided with valve gap joint (18), is installed with valve gap (17) through valve gap joint (18), and said valve gap (17) upper fixed is provided with bonnet (16); Said pilot valve valve body (5) links to each other with main valve (1) respectively through pressure tube, makes in the pilot valve valve body (5) to communicate with main valve air chamber (3) through pressure tube; In pilot valve valve body (5), valve gap (17) and the formed chamber of bonnet (16), be provided with pilot valve valve shaft (9); In said valve gap (17), pilot valve valve shaft (9) middle part is set with pilot valve spring (6); It is characterized in that: said pilot valve valve shaft (9) top is fixed with pilot valve backing plate (13); And level is provided with pilot stem (11) in the upper end of said bonnet (16), and this pilot stem (11) is outer to be provided with pilot valve shift fork (10), and the swinging end of pilot valve shift fork (10) is positioned at pilot valve backing plate (13) below.
2. the Pilot operated safety valve with manually opened mechanism as claimed in claim 1 is characterized in that: an end of described pilot stem (11) is positioned at outside the bonnet (16), and is fixed with pilot valve spanner (12) at this end.
3. according to claim 1 or claim 2 the Pilot operated safety valve with manually opened mechanism, it is characterized in that: said pilot valve valve shaft (9) is outer, pilot valve spring (6) below is provided with pilot valve seat (7) and pilot valve trim ring (8).
4. according to claim 1 or claim 2 the Pilot operated safety valve with manually opened mechanism is characterized in that: the outer valve seat insert (14) that is provided with of said pilot valve valve shaft (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203148341U CN202220890U (en) | 2011-08-26 | 2011-08-26 | Pilot operated safety valve with manual opening mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203148341U CN202220890U (en) | 2011-08-26 | 2011-08-26 | Pilot operated safety valve with manual opening mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202220890U true CN202220890U (en) | 2012-05-16 |
Family
ID=46042917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203148341U Expired - Lifetime CN202220890U (en) | 2011-08-26 | 2011-08-26 | Pilot operated safety valve with manual opening mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202220890U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096940A (en) * | 2020-08-28 | 2020-12-18 | 中油国家油气钻井装备工程技术研究中心有限公司 | Reset type slurry open flow device for drilling pump |
| CN112879632A (en) * | 2021-02-09 | 2021-06-01 | 国家石油天然气管网集团有限公司华南分公司 | Gear motor direct-drive and manual dual-mode electromagnetic pilot type axial flow water hammer relief valve |
-
2011
- 2011-08-26 CN CN2011203148341U patent/CN202220890U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112096940A (en) * | 2020-08-28 | 2020-12-18 | 中油国家油气钻井装备工程技术研究中心有限公司 | Reset type slurry open flow device for drilling pump |
| CN112879632A (en) * | 2021-02-09 | 2021-06-01 | 国家石油天然气管网集团有限公司华南分公司 | Gear motor direct-drive and manual dual-mode electromagnetic pilot type axial flow water hammer relief valve |
| CN112879632B (en) * | 2021-02-09 | 2023-01-17 | 国家石油天然气管网集团有限公司华南分公司 | Gear motor direct-drive and manual dual-mode electromagnetic pilot type axial flow water hammer relief valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120516 |