Pilot operated type safety valve of novel structure and using method

A pilot-operated safety valve with a new structure technology, which is applied in the direction of safety valves, balance valves, valve devices, etc., can solve the problems that it is difficult to meet the fast opening requirements and slow opening speed of large-caliber pilot-operated safety valves, and achieve diversified control , Improve reliability, improve the effect of guiding accuracy

Active Publication Date: 2021-11-05
HARBIN HBC VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The invention solves the problem that the structure of the traditional large-diameter pilot-operated safety valve is slow to open, and it is difficult to meet the fast opening requirements of the large-diameter pilot-operated safety valve, and further discloses "a pilot-operated safety valve with a new structure and its use method"

Method used

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  • Pilot operated type safety valve of novel structure and using method
  • Pilot operated type safety valve of novel structure and using method
  • Pilot operated type safety valve of novel structure and using method

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specific Embodiment approach 1

[0045] Specific implementation mode one: combine Figure 1-Figure 4 Describe this embodiment, a pilot safety valve with a new structure in this embodiment, including a main valve 1 and a pilot valve 16, the pilot valve 16 is arranged on the main valve 1 and communicated with the main valve 1;

[0046]The main valve 1 includes a valve body 2, a valve disc 3, an outer guide sleeve 4, an inner guide sleeve 5, a compression spring 10, a stuffing chamber seat 11 and a gland 15, the valve disc 3 is arranged in the valve body 2, and the outer guide sleeve 4 is fixedly connected with the inner wall of the valve body 2, the outer guide sleeve 4 is provided with an inner guide sleeve 5, the inner guide sleeve 5 is connected with the stuffing chamber seat 11, the inner guide sleeve 5 is arranged on the outside of the valve disc 3, and the compression spring 10 is arranged on Between the valve flap 2 and the stuffing chamber seat 11, the stuffing chamber seat 11 is arranged above the valv...

specific Embodiment approach 2

[0048] Specific implementation mode two: combination Figure 1-Figure 4 Describe this embodiment, a new type of pilot-operated safety valve in this embodiment, the connection between the pilot valve nozzle 102 and the valve disc 3 is installed with a guide ring 6, between the guide ring 6 and the inner side wall of the valve disc 3 A snap ring 7 is provided, and the guide ring 6 plays a guiding role in installing the pilot valve nozzle 102 in the valve clack 3 , and the function of the snap ring 7 is to prevent the guide ring 6 from escaping.

specific Embodiment approach 3

[0049] Specific implementation mode three: combination Figure 1-Figure 4 Describe this embodiment, a pilot safety valve with a new structure in this embodiment, a first sealing ring 8 is provided between the inner guide sleeve 5 and the valve disc 3, and a first sealing ring 8 is provided between the inner guide sleeve 5 and the outer guide sleeve 4. A second sealing ring 9 is provided, through the first sealing ring 8 between the inner guide sleeve 5 and the valve disc 3 and the second sealing ring 9 between the inner guide sleeve 5 and the outer guide sleeve 4 to reduce the infiltration through the gap of the guide sleeve The amount of medium reaching the upper cavity of the disc 3 can effectively improve the internal sealing effect of the main valve 1.

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Abstract

The invention discloses a pilot operated type safety valve of a novel structure and a using method, and relates to large-diameter safety valves in the fields of thermal power, nuclear power and petrifaction. The problems that the structure opening speed of a traditional large-diameter pilot operated type safety valve is low, and the requirement for quick opening of the large-diameter pilot operated type safety valve is difficult to meet are solved. A pilot valve is arranged on a main valve and communicates with the main valve, a valve clack of the main valve is arranged in a valve body, an outer guide sleeve is fixedly connected with the inner wall of the valve body, an inner guide sleeve is arranged in the outer guide sleeve, the inner guide sleeve is connected with a filler chamber seat, the inner guide sleeve is arranged on the outer side of the valve clack, and a compression spring is arranged between the valve clack and the filler chamber seat. The filler chamber seat is arranged above the valve clack and installed in the valve body through a gland, the pilot valve body is connected with the filler chamber seat through a bolt, and a pilot valve nozzle penetrates through a pilot valve seat to be connected with the valve clack. An original two-stage pilot mechanism is replaced with the composite pilot valve structure, and the overall reliability of the pilot valve is improved.

Description

technical field [0001] The invention relates to a pilot-operated safety valve, in particular to a large-diameter safety valve in thermal power, nuclear power and petrochemical fields. Background technique [0002] Pilot-operated safety valve is a kind of non-direct load safety valve. It is composed of a main valve and a pilot valve. The main valve is driven by the medium discharged from the pilot valve. Because the pressure in the system is in the form of pulses, it is also called "pulse safety valve". Viewed alone, the pilot valve itself is also a direct-loaded safety valve. When the medium pressure reaches the opening pressure of the pilot valve, the pilot valve opens first, and the discharged medium enters the main valve from the bypass pipe; [0003] The traditional large-diameter pilot-operated safety valve has the following defects: [0004] 1. The traditional large-diameter pilot-operated safety valve adopts a one-stage booster pilot mechanism. After the pilot valv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K17/10F16K17/06F16K17/168F16K17/04
CPCF16K17/10F16K17/06F16K17/168F16K17/048Y02E30/30
Inventor 胡松柏齐稷徐昆王立新贾建波高德明韩佳琦毛健
Owner HARBIN HBC VALVE
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