CN211259774U - Pilot operated safety valve - Google Patents
Pilot operated safety valve Download PDFInfo
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- CN211259774U CN211259774U CN201922012764.3U CN201922012764U CN211259774U CN 211259774 U CN211259774 U CN 211259774U CN 201922012764 U CN201922012764 U CN 201922012764U CN 211259774 U CN211259774 U CN 211259774U
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- gasket
- sealing
- valve
- upper seat
- valve body
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Abstract
The utility model discloses a pilot operated safety valve, which mainly solves the problem that the sealing performance between a valve body and an upper seat is reduced because the sealing gasket of the prior pilot operated safety valve is easy to damage, and the utility model is different from the prior art that the upper surface of the valve body and the lower surface of the upper seat form corrugated contact surfaces respectively, and the corrugated sealing surface of a gasket is contacted with the corrugated contact surfaces, so that the gap between the valve body and the upper seat can be filled up by the corrugated sealing surface; and the sealing outer ring at the outer end edge of the gasket is fastened together by the bolt, so that the sealing outer ring can be tightly attached to the outer surfaces of the valve body and the upper seat. Therefore, the pilot operated safety valve has the characteristic of good internal sealing effect, so that the service life of the pilot operated safety valve is prolonged.
Description
Technical Field
The utility model relates to a relief valve correlation field, specifically a guide's formula relief valve.
Background
The safety valve is a special valve, wherein the opening and closing part is in a normally closed state under the action of external force, and when the pressure of a medium in equipment or a pipeline rises to exceed a specified value, the medium is discharged to the outside of the system to prevent the pressure of the medium in the pipeline or the equipment from exceeding the specified value. The safety valve is mainly used for boiler, pressure container and pipeline, and its control pressure is not greater than specified value, so that it can play important role in protecting personal safety and equipment operation.
Through search, the invention of patent number 201310454232.X discloses a plastic sealing pilot operated safety valve. In the safety valve, a main valve guide sleeve is arranged in a main valve shell, a main valve clack matched with the main valve guide sleeve is arranged in the main valve guide sleeve, a plastic jacket is arranged in an annular gap between the main valve clack and the main valve guide sleeve, the plastic jacket is fixed on the main valve clack, and a pre-compressed spring is arranged in the plastic jacket to expand the plastic jacket to be tightly attached to the inner wall of the main valve guide sleeve, so that the sliding sealing between the main valve guide sleeve and the main valve clack is realized; the pilot valve is fixed at the upper end of the main valve and is respectively connected with the inlet of the main valve, the air chamber of the main valve and the outlet of the main valve through pressure pipes.
With the acceleration of the industrial modernization process in China, pipelines with high temperature, ultrahigh temperature and high pressure are increasingly increased, and the application environment of the safety valve is increasingly complicated due to the complexity of pipeline valve connection; for the interior of the safety valve, a sealing gasket is usually adopted between the inner valve body and the upper seat for gap sealing, and along with the difference of fluid characteristics and when the temperature of a pipeline is raised, the sealing gasket can generate tensioning force, so that the sealing gasket is easy to damage, and then the sealing gasket between the valve body and the upper seat is damaged, and finally the performance of the safety valve is damaged.
SUMMERY OF THE UTILITY MODEL
Therefore, in order to solve the above-mentioned deficiency, the utility model provides a pilot operated safety valve, mainly solve the problem that the performance of the existing seal gasket of the pilot operated safety valve is easy to be damaged; the utility model is different from the prior art that the upper surface of the valve body and the lower surface of the upper seat form a corrugated contact surface respectively, the corrugated sealing surface of the gasket is contacted with the corrugated contact surface, and the gap between the valve body and the upper seat can be filled up by the corrugated sealing surface; and the sealing outer ring at the outer end edge of the gasket is fastened together by the bolt, so that the sealing outer ring can be tightly attached to the outer surfaces of the valve body and the upper seat. Therefore, the pilot operated safety valve has the characteristic of good internal sealing effect.
The utility model is realized in such a way, a pilot operated safety valve is constructed, which comprises a valve body, a valve, a spring, a gasket, an upper seat, a spring tray, a screw rod, a locking screw, a nut and an outer cap; the gasket is arranged between the valve body and the upper seat, the valve body and the upper seat are fixed through bolts, the outer cap is fixed on the upper seat through locking screws, nuts are arranged at the upper ends of the screw rods, the spring trays are arranged at the lower ends of the screw rods, and springs are arranged between the valves and the spring trays; the method is characterized in that: the upper surface of the valve body and the lower surface of the upper seat form a corrugated contact surface respectively; the upper surface and the lower surface of the gasket form a corrugated sealing surface, the outer end edge of the gasket is provided with a sealing outer ring, and the sealing outer ring can cling to the outer surfaces of the valve body and the upper seat.
According to the utility model relates to a pilot operated relief valve, its characterized in that: the gasket is characterized in that a gasket main body is formed by an alloy framework and a flexible graphite layer filled on the alloy framework, and a bolt hole is formed in the gasket main body.
According to the utility model relates to a pilot operated relief valve, its characterized in that: the thickness of the main body of the gasket is 0.5-1mm, and the distance of the alloy framework is 1.2 mm.
The utility model has the advantages of as follows: the utility model provides a pilot operated safety valve through the improvement, as shown in fig. 1-3, have following improvement and advantage; the valve comprises a valve body, a valve, a spring, a gasket, an upper seat, a spring tray, a screw rod, a locking screw, a nut and an outer cap; compared with the prior valves of the same type, the valve body of the utility model has the difference that the upper surface of the valve body and the lower surface of the upper seat form corrugated contact surfaces respectively; the upper surface and the lower surface of the gasket form a corrugated sealing surface, the outer end edge of the gasket is provided with a sealing outer ring, and the sealing outer ring 14 can cling to the outer surfaces of the valve body and the upper seat. The utility model mainly solves the problem that the sealing performance between the valve body and the upper seat is reduced because the sealing gasket of the prior pilot safety valve is easy to damage, and the utility model is different from the problem that the upper surface of the valve body and the lower surface of the upper seat form corrugated contact surfaces respectively, the corrugated sealing surface of the gasket is contacted with the corrugated contact surfaces, and the gap between the valve body and the upper seat can be filled up by the corrugated sealing surface; and the sealing outer ring at the outer end edge of the gasket is fastened together by the bolt, so that the sealing outer ring can be tightly attached to the outer surfaces of the valve body and the upper seat. Therefore, the pilot operated safety valve has the characteristic of good internal sealing effect, so that the service life of the pilot operated safety valve is prolonged.
In addition, among the pilot operated safety valve of the present invention, the gasket includes an alloy frame and a flexible graphite layer filled in the alloy frame, and a bolt hole is formed in the gasket. The utility model discloses utilize the contraction and the reset function that flexible graphite self has, guarantee under the circumstances of difference with the upper surface of valve body and the leakproofness between the lower surface of seat of honour, the alloy skeleton can be for titanium alloy skeleton, both has necessary intensity and can be corrosion-resistant again.
Drawings
FIG. 1 is a general schematic view of the present invention;
FIG. 2 is a schematic view of the gasket seal of the present invention;
fig. 3 is a schematic structural diagram of the middle gasket of the present invention.
Wherein: the valve comprises a valve body 1, a valve 2, a spring 3, a gasket 4, an upper seat 5, a spring tray 6, a screw 7, a locking screw 8, a nut 9, an outer cap 10, corrugated contact surfaces 11 and 12, a corrugated sealing surface 13, a sealing outer ring 14, an alloy framework 15, a flexible graphite layer 16 and a bolt hole 17.
Detailed Description
The present invention will be described in detail with reference to fig. 1 to 3, and the technical solutions in the embodiments of the present invention will be clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The present invention provides a pilot operated safety valve by improvement, as shown in fig. 1 to 3, which can be implemented as follows; the valve comprises a valve body 1, a valve 2, a spring 3, a gasket 4, an upper seat 5, a spring tray 6, a screw 7, a locking screw 8, a nut 9 and an outer cap 10; the gasket 4 is arranged between the valve body 1 and the upper seat 5, the valve body 1 and the upper seat 5 are fixed through bolts, the outer cap 10 is fixed on the upper seat 5 through a locking screw 8, the upper end of the screw rod 7 is provided with a nut 9, the lower end of the screw rod 7 is provided with a spring tray 6, and the spring 3 is arranged between the valve 2 and the spring tray 6; compared with the prior valves of the same type, the valve body 1 of the utility model has the difference that the upper surface and the lower surface of the upper seat 5 form corrugated contact surfaces 11 and 12 respectively; the upper surface and the lower surface of the gasket 4 form a corrugated sealing surface 13, the outer end edge of the gasket 4 is provided with a sealing outer ring 14, and the sealing outer ring 14 can be tightly attached to the outer surfaces of the valve body 1 and the upper seat 5. The utility model mainly solves the problem that the sealing performance between the valve body 1 and the upper seat 5 is reduced because the sealing gasket of the prior pilot-operated safety valve is easy to damage, and the utility model is different from the problem that the upper surface of the valve body 1 and the lower surface of the upper seat 5 respectively form corrugated contact surfaces 11 and 12, and the corrugated sealing surface 13 of the gasket 4 is contacted with the corrugated contact surfaces, and the corrugated sealing surface 13 can fill the gap between the valve body 1 and the upper seat 5; together with the sealing outer ring 14 at the outer end edge of the gasket 4, when the valve body 1 and the upper seat 5 are fastened together through bolts, the sealing outer ring 14 can be tightly attached to the outer surfaces of the valve body 1 and the upper seat 5. Therefore, the pilot operated safety valve has the characteristic of good internal sealing effect, so that the service life of the pilot operated safety valve is prolonged.
Among the pilot operated safety valve of the present invention, the gasket 4 is composed of an alloy frame 15 and a flexible graphite layer 16 filled in the alloy frame 15, and a bolt hole 17 is formed in the gasket 4. The utility model discloses utilize the contraction and the reset function that flexible graphite self has, guarantee under the circumstances of difference with the leakproofness between the upper surface of valve body 1 and the lower surface of upper seat 5, alloy skeleton 15 can be titanium alloy skeleton, both has necessary intensity and can be corrosion-resistant again.
The thickness of the main body of the gasket 4 is 0.5-1mm, and the distance of the alloy framework 15 is 1.2 mm.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A pilot operated safety valve comprises a valve body (1), a valve (2), a spring (3), a gasket (4), an upper seat (5), a spring tray (6), a screw rod (7), a locking screw (8), a nut (9) and an outer cap (10); the gasket (4) is arranged between the valve body (1) and the upper seat (5), the valve body (1) and the upper seat (5) are fixed through bolts, the outer cap (10) is fixed on the upper seat (5) through a locking screw (8), the upper end of the screw rod (7) is provided with a nut (9), the lower end of the screw rod (7) is provided with a spring tray (6), and a spring (3) is arranged between the valve (2) and the spring tray (6); the method is characterized in that: the upper surface of the valve body (1) and the lower surface of the upper seat (5) form corrugated contact surfaces (11, 12) respectively; the upper surface and the lower surface of the gasket (4) form a corrugated sealing surface (13), the outer end edge of the gasket (4) is provided with a sealing outer ring (14), and the sealing outer ring (14) can be tightly attached to the outer surfaces of the valve body (1) and the upper seat (5).
2. The pilot operated safety valve according to claim 1, wherein: the gasket (4) is characterized in that a main body of the gasket (4) is composed of an alloy framework (15) and a flexible graphite layer (16) filled on the alloy framework (15), and a bolt hole (17) is formed in the main body.
3. The pilot operated safety valve according to claim 2, wherein: the thickness of the main body of the gasket (4) is 0.5-1mm, and the distance of the alloy framework (15) is 1.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922012764.3U CN211259774U (en) | 2019-11-20 | 2019-11-20 | Pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922012764.3U CN211259774U (en) | 2019-11-20 | 2019-11-20 | Pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211259774U true CN211259774U (en) | 2020-08-14 |
Family
ID=71990193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922012764.3U Active CN211259774U (en) | 2019-11-20 | 2019-11-20 | Pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211259774U (en) |
-
2019
- 2019-11-20 CN CN201922012764.3U patent/CN211259774U/en active Active
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