CN216306896U - Pilot operated safety valve - Google Patents
Pilot operated safety valve Download PDFInfo
- Publication number
- CN216306896U CN216306896U CN202122859751.7U CN202122859751U CN216306896U CN 216306896 U CN216306896 U CN 216306896U CN 202122859751 U CN202122859751 U CN 202122859751U CN 216306896 U CN216306896 U CN 216306896U
- Authority
- CN
- China
- Prior art keywords
- main valve
- valve
- pilot
- main
- valve body
- 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.)
- Active
Links
Images
Landscapes
- Fluid-Driven Valves (AREA)
Abstract
The utility model relates to a pilot operated safety valve, comprising: a main valve: the main valve comprises a main valve body and a main valve flap component, wherein a communicating cavity is arranged in the main valve flap component; pilot valve: the main valve body and the pilot valve body are connected into a whole through a connecting piece, and the communicating cavity is communicated with the pilot valve inlet; the safety valve also comprises a medium channel, the medium channel is communicated with the main valve inlet, the communicating cavity and the pilot valve inlet, and the medium channel is arranged on the main valve body. The utility model cancels a bracket or a connecting plate, and the main valve is directly connected with the pilot valve, so that the valve structure is more compact; the medium channel of the pilot valve is arranged on the main valve body, so that the possibility of valve failure caused by the damage of the connecting pipe due to external factors is avoided, and the valve can bear higher pressure; the use of part of parts is eliminated, the number of the parts is greatly reduced, leakage points are reduced, and the risk of leakage of the valve is greatly reduced; and the assembly is simpler and more convenient, and the working efficiency of workers is greatly improved.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a pilot operated safety valve.
Background
The pilot safety valve generally comprises a main valve and a pilot valve, wherein the pilot valve is fixed on the main valve through a bracket and is communicated with the main valve through a joint and a connecting pipe, and the action of the main valve is controlled through the opening and closing of the pilot valve. The pilot operated safety valve is mainly used in the industries of oil refining, chemical engineering and the like, and has the advantages that the spring loaded safety valve does not have, such as: the pilot operated safety valve can realize high sealing performance, can meet the working condition that the difference value between the working pressure and the setting pressure is small, can be used in the occasions with large caliber and high setting pressure and can be used in the occasions with high back pressure. However, the conventional fixing and connecting method of the pilot valve and the main valve has too many leakage points and is easy to leak under high pressure (more than 10 MPa).
The existing pilot operated safety valve is basically fixed with a main valve by a bracket (or a connecting plate), as shown in fig. 1, an inlet and an outlet of the pilot valve are connected with corresponding positions of the main valve by a pipe joint, a pipe joint nut, a pipe joint connecting pipe, a connecting pipe and other parts. The mode has no obvious defects when the pressure of the valve is low, and the processes of processing, assembling and the like are relatively simple; therefore, the existing pilot operated safety valve basically adopts such a structure. However, when the pressure of the valve is high, the threaded joint, the connecting pipe and the sealing element are too many, so that many leakage points are caused, and the valve has high probability of leakage. In addition, under high pressure, the connecting pipe has the risk of rupture (especially, the connecting pipe is exposed, easy to corrode and partially damaged), and personnel injury accidents can be caused.
Disclosure of Invention
The utility model aims to provide a pilot operated safety valve, in particular to a high-pressure low-leakage pilot operated safety valve.
In order to achieve the purpose, the utility model adopts the technical scheme that:
a pilot operated safety valve comprising:
a main valve: the valve comprises a main valve body and a main valve flap assembly, wherein a main valve cavity is arranged in the main valve body, and a main valve inlet and a main valve outlet which are communicated with the main valve cavity are formed in the main valve body; the main valve flap component is movably arranged in the main valve cavity and controls the opening and closing of the main valve inlet, and a communication cavity is arranged in the main valve flap component;
the pilot valve comprises a pilot valve body and a pilot valve flap, the pilot valve body is provided with a pilot valve cavity, and the pilot valve body is provided with a pilot valve inlet and a pilot valve outlet which are communicated with the pilot valve cavity; the pilot valve flap is movably arranged in the pilot valve cavity to control the opening and closing of the pilot valve inlet,
the main valve body and the pilot valve body are connected into a whole through a connecting piece, and the communication cavity is communicated with the pilot valve inlet; the safety valve also comprises a medium channel, the medium channel is communicated with the main valve inlet, the communicating cavity and the pilot valve inlet, and the medium channel is arranged on the main valve body.
Preferably, the main valve body comprises a main valve base and a main valve cover plate, the main valve base and the main valve cover plate jointly enclose the main valve cavity, and the medium channel extends from the main valve base to the main valve cover plate.
Further preferably, an inlet of the medium passage is opened on the main valve base and communicated with the main valve inlet, and an outlet of the medium passage is opened on the main valve upper cover and communicated with the communication cavity and the pilot valve inlet.
Further preferably, said connector is connected between said main blanking panel and said pilot valve body.
Preferably, the connecting piece comprises a connecting pipe, one end of the connecting pipe is connected with the main valve body in a sealing mode, and the other end of the connecting pipe is connected with the pilot valve body in a sealing mode.
Further preferably, the main valve body comprises a main valve base and a main valve cover plate, the main valve base and the main valve cover plate jointly enclose the main valve cavity, and the connecting pipe is in threaded connection with the main valve cover plate and the pilot valve body.
Further preferably, the connecting element is only the adapter tube, one end of the adapter tube is detachably connected with the main valve body, and the other end of the adapter tube is integrally formed with or detachably connected with the pilot valve body.
Preferably, the connecting member comprises a flange, the flange is connected with the pilot valve body, and the pilot valve body is connected with the main valve body through the flange.
Further preferably, the main valve body comprises a main valve base and a main valve cover plate, the main valve base and the main valve cover plate jointly enclose the main valve cavity, and the flange is connected with the main valve cover plate.
Further preferably, the flange is integrally formed with the pilot valve body.
Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. a bracket or a connecting plate is eliminated, and the main valve is directly connected with the pilot valve, so that the valve structure is more compact;
2. the medium channel of the pilot valve is arranged on the main valve body, so that the possibility of valve failure caused by the damage of the connecting pipe due to external factors is avoided;
3. the medium channel and the main valve body are integrally finished in a finish machining mode, the strength is higher, and the valve can bear higher pressure;
4. the use of part of parts is eliminated, the number of the parts is greatly reduced, leakage points are reduced, and the risk of leakage of the valve is greatly reduced; and the assembly is simpler and more convenient, and the working efficiency of workers is greatly improved.
Drawings
FIG. 1 is a schematic structural diagram of a pilot operated safety valve in the prior art;
FIG. 2 is a schematic structural diagram of the present embodiment in a closed state;
FIG. 3 is a schematic structural diagram of the present embodiment in an open state;
FIG. 4 is a schematic structural diagram of the connecting member of the present embodiment as a connecting pipe;
fig. 5 is a schematic structural view of the connecting member of this embodiment in the form of a flange.
In the above drawings:
1. a main valve; 10. a main valve body; 10a, a main valve base; 10b, a main valve cover plate; 100. a main valve chamber; 101. a main valve inlet; 102. a main valve outlet; 103. a media channel; 110. a guide sleeve; 111. a valve flap; 112. an elastic member; 113. a communicating cavity; 12. a valve seat; 13. a fastener; 2. a pilot valve; 20. a pilot valve body; 200. a valve guide cavity; 201. a pilot valve inlet; 202. an outlet of the pilot valve; 21. a valve guide flap; 30. taking over a pipe; 31. and (4) a flange.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
A pilot operated safety valve as shown in fig. 2 and 3 includes a main valve 1 and a pilot valve 2. The main valve 1 is used to protect the pressure of the pipe or equipment in which it is arranged, and the pilot valve 2 is used to actuate or control the main valve 1.
The main valve 1 includes a main valve body 10, a main valve flap assembly, a valve seat 12, and the like. The main valve body 10 acts as a pressure bearing to prevent leakage of media while providing a pilot function for the main valve flap assembly. The main valve body 10 has a main valve chamber 100 therein, and the main valve body 10 is provided with a main valve inlet 101 and a main valve outlet 102 communicating with the main valve chamber 100. In this embodiment: the main valve body 10 includes a main valve base 10a and a main valve cover plate 10b, the main valve base 10a and the main valve cover plate 10b together enclose a main valve chamber 100, and a main valve inlet 101 and a main valve outlet 102 are both opened on the main valve base 10 a. The base main valve 10a and the cover main valve 10b are fastened by a fastener 13, and a seal ring is provided between the two for sealing.
The valve seat 12 is provided at the main valve inlet 100, and is directly engaged with the main valve flap assembly to open and close the main valve inlet 101, and the valve seat 12 and the main valve base 10a are screwed and seal-welded.
The main valve flap assembly is movably disposed in the main valve chamber 100 as a moving member, and the opening and closing of the main valve inlet 101 is controlled by the movement of the main valve flap assembly, thereby opening and closing the main valve. In this embodiment: the main valve flap component comprises a guide sleeve 110, a valve flap 111 and an elastic part 112, wherein the guide sleeve 110 is fixed between the main valve base 10a and the main valve cover plate 10b, plays a role in guiding and limiting and is used for guiding and opening the height limit of the valve flap 111; the valve clack 111 is movably arranged in the guide sleeve 110, and a sealing ring is arranged between the valve clack 111 and the guide sleeve 110; the elastic member 112 is connected to the valve flap 111, and always gives the valve flap 111 an elastic force for closing the main valve inlet 101. The main valve flap assembly has a communication chamber 113 therein, and the communication chamber 113 communicates with the main valve inlet 101 to control opening and closing of the valve flap 111.
The safety valve further comprises a medium passage 103, the medium passage 103 communicates the main valve inlet 113 with the communication chamber 103, the pilot valve inlet 201, and the medium passage 103 opens on the main valve body 1. In this embodiment: an inlet of the medium passage 103 is opened to the master valve seat 10a and communicates with the master valve inlet 101, the medium passage 103 extends from the master valve seat 10a to the master valve cover plate 10b, and an outlet of the medium passage 103 is opened to the master valve cover 10b and communicates with the communication chamber 103 and the pilot valve inlet 201. When the medium passage 103 is machined in the main valve base 10a and the main valve cover plate 10b, the hole can be blocked by welding or screwing after the machining is finished in a hole drilling mode, as shown in a figure, so that the medium passage 103 can be integrally finished with the main valve body 10, the strength is higher, and the valve can bear higher pressure.
Because the medium channel 103 is arranged on the main valve body 10, the possibility of valve failure caused by the damage of the connecting pipe due to external factors can be avoided, and simultaneously, a bracket or a connecting plate can be eliminated, namely, the use of partial parts is eliminated, so that the number of parts is greatly reduced, the leakage points are reduced, and the risk of valve leakage is greatly reduced; the valve is simpler and more convenient to assemble, the working efficiency of workers is greatly improved, and the structure of the valve is more compact.
The pilot valve 2 comprises a pilot valve body 20 and a pilot valve flap 21, wherein the pilot valve body 20 is provided with a pilot valve cavity 200, a pilot valve inlet 201 and a pilot valve outlet 202 which are communicated with the pilot valve cavity 200 are arranged on the pilot valve body 20, and the pilot valve flap 21 is movably arranged in the pilot valve cavity 200 to control the opening and the closing of the pilot valve inlet 201.
In this embodiment: the main valve body 10 and the pilot valve body 20 are integrally connected by a connecting member, specifically, a connecting member is connected between the main valve cover plate 10b and the pilot valve body 20, and communicates the communication chamber 113 with the pilot valve inlet 201. Two embodiments of the connection are given in detail below:
the first method is as follows: the connecting piece comprises a connecting pipe, one end of the connecting pipe is connected with the main valve cover plate 10b of the main valve body 10 in a sealing mode, and the other end of the connecting pipe is connected with the pilot valve body 20 in a sealing mode, such as threaded connection and the like. As shown in fig. 4: in this embodiment: the connector is simply a nipple 30, one end of which is detachably connected to the main valve body 10, specifically by means of a screw, and the other end of the nipple 30 is integrally formed with the pilot valve body 20, which can reduce the leakage point between the nipple 30 and the pilot valve body 20, but makes the structure of the pilot valve 2 complicated and makes the manufacturing difficult, or the other end of which is detachably connected to the pilot valve body 20, specifically by means of a screw. Generally, when the adapter 30 is used as the connector, the existing adapter and nut can be omitted, and the number of parts can be reduced.
The second method comprises the following steps: the connector comprises a flange 31, the flange 31 is connected with the pilot valve body 20, the pilot valve body 20 is connected with the main valve cover plate 10b of the main valve body 10 through the flange 31 through a fastening piece 13, and sealing is carried out through a sealing ring, as shown in fig. 5. The flange 31 may be formed integrally with the pilot valve body 20 or may be welded to the pilot valve body 20 at a later stage or may be detachably connected via the pilot valve body 20, in particular by means of a thread. This connection can be an alternative to the connection tube 30, and shortens the medium flow path, reduces the leakage point, and also makes the valve more compact.
The following specifically explains the working process of this embodiment:
from the main valve inlet 101, the medium communicates with the communication chamber 113, the pilot valve inlet 201 via the medium passage 103, as indicated by the flow arrows in fig. 2;
when the medium pressure reaches the valve opening pressure, the pilot valve flap 21 opens the pilot valve inlet 201, the medium in the main valve communication chamber 113 is discharged, the pressure in the communication chamber 113 decreases (the inflow amount of the medium passage 103 is smaller than the discharge amount of the pilot valve 2), the valve flap 111 opens, as shown in fig. 3, the system medium is discharged, and the system pressure is reduced.
When the system pressure drops to the valve back pressure, the pilot valve flap 21 closes the pilot valve inlet 201, the medium enters the communication chamber 113 through the medium passage 103, the communication chamber 113 is pressurized, and the valve flap 111 closes, preventing the medium from being discharged.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. A pilot operated safety valve comprising:
a main valve: the valve comprises a main valve body and a main valve flap assembly, wherein a main valve cavity is arranged in the main valve body, and a main valve inlet and a main valve outlet which are communicated with the main valve cavity are formed in the main valve body; the main valve flap component is movably arranged in the main valve cavity and controls the opening and closing of the main valve inlet, and a communication cavity is arranged in the main valve flap component;
pilot valve: the pilot valve comprises a pilot valve body and a pilot valve flap, wherein the pilot valve body is provided with a pilot valve cavity, and the pilot valve body is provided with a pilot valve inlet and a pilot valve outlet which are communicated with the pilot valve cavity; the pilot valve flap is movably arranged in the pilot valve cavity to control the opening and closing of the inlet of the pilot valve, and is characterized in that:
the main valve body and the pilot valve body are connected into a whole through a connecting piece, and the communication cavity is communicated with the pilot valve inlet; the safety valve also comprises a medium channel, the medium channel is communicated with the main valve inlet, the communicating cavity and the pilot valve inlet, and the medium channel is arranged on the main valve body.
2. The pilot operated safety valve according to claim 1, wherein: the main valve body comprises a main valve base and a main valve cover plate, the main valve base and the main valve cover plate jointly enclose and form the main valve cavity, and the medium channel extends from the main valve base to the main valve cover plate.
3. The pilot operated safety valve according to claim 2, wherein: the inlet of the medium channel is arranged on the main valve base and communicated with the inlet of the main valve, and the outlet of the medium channel is arranged on the upper cover of the main valve and communicated with the communicating cavity and the inlet of the pilot valve.
4. The pilot operated safety valve according to claim 2, wherein: the connecting piece is connected between the main valve cover plate and the pilot valve body.
5. The pilot operated safety valve according to claim 1, wherein: the connecting piece comprises a connecting pipe, one end of the connecting pipe is hermetically connected with the main valve body, and the other end of the connecting pipe is hermetically connected with the pilot valve body.
6. The pilot operated safety valve according to claim 5, wherein: the main valve body comprises a main valve base and a main valve cover plate, the main valve base and the main valve cover plate jointly enclose to form the main valve cavity, and the connecting pipe is connected with the main valve cover plate and the pilot valve body through threads.
7. The pilot operated safety valve according to claim 5, wherein: the connecting piece is only the connecting pipe, one end of the connecting pipe is detachably connected with the main valve body, and the other end of the connecting pipe is integrally formed with or detachably connected with the pilot valve body.
8. The pilot operated safety valve according to claim 1, wherein: the connecting piece comprises a flange, the flange is connected with the pilot valve body, and the pilot valve body is connected with the main valve body through the flange.
9. The pilot operated safety valve according to claim 8, wherein: the main valve body comprises a main valve base and a main valve cover plate, the main valve base and the main valve cover plate jointly enclose the main valve cavity, and the flange is connected with the main valve cover plate.
10. The pilot operated safety valve according to claim 9, wherein: the flange and the pilot valve body are integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122859751.7U CN216306896U (en) | 2021-11-19 | 2021-11-19 | Pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122859751.7U CN216306896U (en) | 2021-11-19 | 2021-11-19 | Pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216306896U true CN216306896U (en) | 2022-04-15 |
Family
ID=81123204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122859751.7U Active CN216306896U (en) | 2021-11-19 | 2021-11-19 | Pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216306896U (en) |
-
2021
- 2021-11-19 CN CN202122859751.7U patent/CN216306896U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5775978B2 (en) | Rapid exhaust valves for railway vehicles and piping systems for railway vehicles | |
| JP2019525083A (en) | Tank valve | |
| CN106870441B (en) | Nuclear power station main pump axle envelope injects water system | |
| US5582202A (en) | Air conditioner system charge/relief valve | |
| CN216306896U (en) | Pilot operated safety valve | |
| CN201016406Y (en) | Relief valve | |
| CN216618065U (en) | Pressure reducing valve with high-pressure automatic closing protection function | |
| CN112664659A (en) | Cut-off valve | |
| CN113137568A (en) | Built-in emergency cut-off device for liquefied gas storage tank | |
| CN219327817U (en) | Main valve of pressure relief valve | |
| CN212616662U (en) | Air release valve | |
| CN220488905U (en) | Pressure relief explosion venting device for gas box | |
| CN215721071U (en) | Overpressure protection joint, overpressure protection valve and manifold | |
| CN220249123U (en) | Grease injection valve failure emergency plugging device | |
| CN216344269U (en) | Combined safety valve | |
| CN110608300A (en) | One-way interface gas circuit replacing device | |
| CN217842823U (en) | Deep well safety valve for petrochemical industry | |
| CN218347674U (en) | Oil circuit integrated block of gas turbine hydraulic actuating mechanism | |
| CN220622839U (en) | Stop valve for air conditioner | |
| CN215487811U (en) | Automatic minimum flow valve | |
| CN214331551U (en) | Metal seal top-mounted ball valve | |
| CN217874278U (en) | Hydraulic pipeline pressure relief device based on metal seal and engineering machinery | |
| CN221278569U (en) | Natural gas pressure reducer for vehicle | |
| CN219177197U (en) | Water hammer eliminating device for flow regulating valve | |
| CN212564660U (en) | Straight-through pressure-holding relief valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |