CN218787342U - Simple backflow protector for pilot operated safety valve - Google Patents
Simple backflow protector for pilot operated safety valve Download PDFInfo
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- CN218787342U CN218787342U CN202223136363.7U CN202223136363U CN218787342U CN 218787342 U CN218787342 U CN 218787342U CN 202223136363 U CN202223136363 U CN 202223136363U CN 218787342 U CN218787342 U CN 218787342U
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- valve
- slider
- safety valve
- base body
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Abstract
The utility model discloses a be used for guide's formula relief valve to be provided with simple and easy type backflow protector, including the tee bend base member, the inside left side position department of tee bend base member is provided with left disk seat, left side disk seat right-hand member position department is provided with the red copper gasket, the inside intermediate position department of tee bend base member is provided with the slider, both ends position department is provided with O type sealing washer about the slider, this a simple and easy type backflow protector for guide's formula relief valve, the inside tee bend and the slider structure of adopting of protector, make pilot valve output system medium pressure, the additional back pressure of main valve exit end switch over input in the main valve epicoele air chamber, improved the sealed reliability of main valve and backflow prevention, no matter whether there is additional backpressure, guide's formula relief valve can be long-term trouble-free operation all the time, slider O type circle seal structure can reach zero leakage, has improved the sealing performance of protector greatly, has overcome the shortcoming that like product on the internal market at present often leads to unable backflow prevention.
Description
Technical Field
The utility model belongs to the technical field of the valve is relevant, concretely relates to simple and easy type backflow protector for guide's formula relief valve.
Background
The valve is a simple backflow protector for a pilot operated safety valve, relates to the fields of petroleum and natural gas, chemical industry, electric power, metallurgy, urban gas and the like, and is a common accessory of a pressurized device, a container and a pipeline overpressure protection device and a pilot operated safety valve.
Through the retrieval, patent document with application number CN201380006896.8 discloses a simple backflow protector for a pilot operated safety valve, including tee bend base member, left disk seat, right disk seat, slider etc, the slider is connected through the mode of cover inlay and tee bend base member inside, the slider is connected through the mode and the O type sealing washer of gomphosis, the utility model provides a simple backflow protector for a pilot operated safety valve, to pilot valve output end system medium pressure, main valve exit end additional backpressure can't switch over input in the main valve on the cavity air chamber, the reliability that the main valve is sealed is with prevent that the backward flow is less than, when there is additional backpressure, the problem that the pilot operated safety valve can not have trouble operation for a long time.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple and easy type backward flow protector for pilot-operated safety valve to solve the pilot valve output end system medium pressure that proposes in the above-mentioned background art, the main valve exit end attaches the backpressure and can't switch over the input in the main valve epicoele air chamber, the reliability that the main valve is sealed is more weak with the anti-return, when there is additional backpressure, the problem of the long-term trouble-free operation of pilot-operated safety valve.
In order to achieve the above object, the utility model provides a following technical scheme: a simple backflow protector for a pilot operated safety valve comprises a three-way base body, a left valve seat is arranged at the left side position inside the three-way base body, a red copper gasket is arranged at the right end position of the left valve seat, a sliding block is arranged at the middle position inside the three-way base body, and O-shaped sealing rings are arranged at the left end position and the right end position of the sliding block.
Preferably, a right valve seat is arranged at the right side position inside the three-way base body, and the right valve seat is connected with the three-way base body in a threaded connection mode.
Preferably, the sliding block is connected with the inside of the three-way base body in a sleeving and embedding mode, and the sliding block is connected with the O-shaped sealing ring in an embedding and embedding mode.
Preferably, the left valve seat is connected with the three-way base body in a threaded connection mode, and the left valve seat is made of metal materials.
Preferably, the red copper gasket is connected with the left valve seat in an embedded mode, and the red copper gasket is made of pure copper materials.
Compared with the prior art, the utility model provides a simple and easy type backflow protector for guide's formula relief valve possesses following beneficial effect:
in the simple backflow protector for the pilot operated safety valve, the interior of the protector adopts a three-way and sliding block structure, so that the medium pressure of a pilot valve output end system and the additional back pressure at the outlet end of a main valve can be switched and input into an air chamber on the main valve, the sealing reliability and backflow prevention of the main valve are improved, the pilot operated safety valve can always operate without failure for a long time regardless of the additional back pressure, the O-shaped sealing structure of the sliding block can achieve zero leakage, the sealing performance of the protector is greatly improved, and the defect that the backflow prevention cannot be realized due to the fact that similar products on the domestic market often leak at present is overcome.
Drawings
Fig. 1 is a schematic view of a section structure of a simple backflow protector for a pilot operated safety valve according to the present invention.
In the figure: 1. a tee joint base body; 2. a left valve seat; 3. a red copper gasket; 4. a slider; 5. an O-shaped sealing ring; 6. and a right valve seat.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, 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 utility model provides a be used for guide's formula relief valve to be provided with simple and easy type backward flow protector as shown in figure 1, including tee bend base member 1, 1 inside left side position department of tee bend base member is provided with left disk seat 2, and 2 right-hand member position departments of left disk seat are provided with red copper gasket 3, and 1 inside intermediate position departments of tee bend base member are provided with slider 4, and both ends position department is provided with O type sealing washer 5 about slider 4, and 1 inside right side position department of tee bend base member is provided with right disk seat 6, and right disk seat 6 is connected through threaded connection's mode and tee bend base member 1.
As shown in fig. 1, the slider 4 is connected to the inside of the three-way base 1 by fitting, the slider 4 is connected to the O-ring 5 by fitting, and when the slider 4 moves rightward, the O-ring 5 of the slider 4 comes into contact with the right valve seat 2 and seals the same.
As shown in fig. 1, the left valve seat 2 is connected with the three-way base body 1 in a threaded connection mode, the left valve seat 2 is made of metal materials, the red copper gasket 3 is connected with the left valve seat 2 in an embedded mode, the red copper gasket 3 is made of pure copper materials, and when the sliding block 4 moves leftwards, the O-shaped sealing ring 5 of the sliding block 4 is attached to the left valve seat 2 to be sealed.
The utility model discloses the theory of operation: the three-way base body 1 is firstly installed on a safety valve, when no additional back pressure exists at the outlet of the safety valve or the existing back pressure of an accessory is smaller than the system pressure, a medium in the system flows into a pilot valve input pipe and a backflow protector through a pressure sampling pipe in a main valve, at the moment, a sliding block 4 moves rightwards under the action of right thrust generated by the medium pressure in the system, an O-shaped sealing ring 5 of the sliding block 4 is attached to a right valve seat 6 for sealing, the system medium enters an upper cavity air chamber of the main valve through A-C, the safety valve can normally operate and protect the system safety, when the additional back pressure exists at the outlet of the safety valve and is larger than the system pressure, the left thrust generated by the additional back pressure at the outlet on the sliding block 4 is larger than the right thrust generated by the medium pressure in the system on the sliding block 4, the sliding block 4 is driven to move, the O-shaped sealing ring 5 of the sliding block 4 is attached to a left valve seat 2 for sealing, the additional back pressure can only enters the upper cavity of the main valve through B-C, so that downward thrust is generated on the valve clack, the main valve clack, the main valve is tightly pressed on the valve seat, the main valve clack, the main valve is ensured that the additional back pressure is larger, the additional back pressure is not returned to the front of the outlet to the main valve or the main valve, and the valve, the valve clack, so that the valve clack, the valve clack is suddenly opened, and the safety valve clack, the safety valve can normally operates, and the safety valve can be protected.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (5)
1. The simple backflow protector for the pilot operated safety valve comprises a three-way base body (1), a left valve seat (2) located at the left side position inside the three-way base body (1), and a red copper gasket (3) located at the right end position of the left valve seat (2)
The method is characterized in that: a sliding block (4) is arranged in the middle of the interior of the tee joint base body (1), and O-shaped sealing rings (5) are arranged at the left end and the right end of the sliding block (4).
2. The simplified backflow protector for a pilot operated safety valve according to claim 1, wherein: the tee joint is characterized in that a right valve seat (6) is arranged at the right side position inside the tee joint base body (1), and the right valve seat (6) is connected with the tee joint base body (1) in a threaded connection mode.
3. The simplified backflow protector for a pilot operated safety valve according to claim 1, wherein: the sliding block (4) is connected with the inside of the three-way base body (1) in a sleeved and embedded mode, and the sliding block (4) is connected with the O-shaped sealing ring (5) in an embedded mode.
4. The simplified backflow protector for a pilot operated safety valve according to claim 1, wherein: the left valve seat (2) is connected with the three-way base body (1) in a threaded connection mode, and the left valve seat (2) is made of metal materials.
5. The simplified backflow protector for a pilot operated safety valve according to claim 1, wherein: the red copper gasket (3) is connected with the left valve seat (2) in an embedded mode, and the red copper gasket (3) is made of pure copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223136363.7U CN218787342U (en) | 2022-11-25 | 2022-11-25 | Simple backflow protector for pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223136363.7U CN218787342U (en) | 2022-11-25 | 2022-11-25 | Simple backflow protector for pilot operated safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218787342U true CN218787342U (en) | 2023-04-04 |
Family
ID=86504598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223136363.7U Active CN218787342U (en) | 2022-11-25 | 2022-11-25 | Simple backflow protector for pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218787342U (en) |
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2022
- 2022-11-25 CN CN202223136363.7U patent/CN218787342U/en active Active
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