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Pneumatic relief device and working method thereof

A discharge device and pneumatic technology, applied in the direction of valve operation/release device, valve device, cock including cut-off device, etc., can solve the problems of large impact on the sealing surface, irregular flow channel, large medium resistance, etc., and achieve sealing Reliable, long service life, low sealing specific pressure effect

Inactive Publication Date: 2021-12-10
HARBIN HBC VALVE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The research and development purpose of the present invention is to solve the problem of irregular internal flow path and large medium resistance of the existing electromagnetic relief device, the main valve is a spring direct action type, the impact on the sealing surface is relatively large when it is closed, and cracks and leakage are prone to occur under impact conditions. problem, a brief overview of the invention is given below in order to provide a basic understanding of some aspects of the invention

Method used

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  • Pneumatic relief device and working method thereof
  • Pneumatic relief device and working method thereof
  • Pneumatic relief device and working method thereof

Examples

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Effect test

specific Embodiment approach 1

[0034] Specific implementation mode one: combine Figure 1-Figure 4 Describe this embodiment. A pneumatic relief device of this embodiment includes a pneumatic relief valve 1 and a manual ball valve 2 connected and fixed thereto. The medium flows through the manual ball valve 2 and the pneumatic relief valve 1 in sequence; the manual ball valve 2 and the pneumatic The discharge valve 1 adopts a fixed connection, so that the internal flow path of the device is regular, the medium resistance is small, the structure is simple, the switch is smooth and fast, the leakage point is small, the sealing ring is not affected by the temperature, the interchangeability is good, the maintenance is convenient, and the mechanical Limit, there is no clearance phenomenon. The pneumatic relief device is used as a protection device before the action of the boiler overpressure safety valve. The pneumatic relief valve 1 is controlled by an electrical signal to open to remove excess steam from the bo...

specific Embodiment approach 2

[0044] Specific implementation mode two: combination Figure 1-Figure 4 Describe this embodiment, based on specific embodiment one, the working method of a kind of pneumatic relief device of this embodiment:

[0045] During normal operation, the manual valve sphere 205 of the manual ball valve 2 is in line with the manual valve flow channel 208, the manual ball valve 2 is in the open position, the pneumatic actuator 114 of the pneumatic relief valve 1 is in the intake state, and the pneumatic valve sphere 105 and the pneumatic valve The flow channel 108 is vertical, the pneumatic relief ball valve 1 is in the closed position, and the pneumatic valve ball 105 is under the combined action of the medium force and the compression force of the pneumatic valve disc spring 104 transmitted to the pneumatic valve ball 105 through the left valve seat 104 of the pneumatic valve. The sealing surface of the sphere 105 is in close contact with the sealing surface of the right valve seat 106...

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Abstract

The invention discloses a pneumatic relief device and a working method thereof, and belongs to the technical field of protection devices before action of an overpressure safety valve of a boiler system. According to a pneumatic relief valve and a manual ball valve fixedly communicated with the pneumatic relief valve, a medium sequentially flows through the manual ball valve and the pneumatic relief valve. The pneumatic relief device aims to solve the problems of an irregular internal flow channel, large medium resistance, larger impact on a sealing surface during closing and easy generation of cracks and leakage under the impact condition due to the fact that a main valve is of a spring direct action type, so that an internal flow channel of the device is regular, the medium resistance is small, the structure is simple, the opening and closing are smooth and rapid, and the number of leakage points is small. A sealing ring is less affected by temperature, good in interchangeability, convenient to maintain, and free of a excessive closing phenomenon due to mechanical limiting.

Description

technical field [0001] The invention relates to a pneumatic relief device, which belongs to the technical field of protection devices for boiler system overpressure safety valves before action. Background technique [0002] The protection device before the action of the overpressure safety valve in the existing boiler system is an electromagnetic relief device, which is composed of an electromagnetic relief valve and a manual gate valve. The electromagnetic relief valve is controlled by an electric signal to open to remove excess steam from the boiler. The manual gate valve is installed before the electromagnetic relief valve. When the electromagnetic relief valve fails, the manual gate valve is closed, so that the electromagnetic relief valve is isolated from the system, and the boiler is disassembled without stopping the furnace to check the electromagnetic relief valve. [0003] The electromagnetic relief device is composed of an electromagnetic relief valve and a manual...

Claims

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Application Information

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IPC IPC(8): F16K5/06F16K5/08F16K5/20F16K17/164F16K17/168F16K27/06F16K31/14
CPCF16K5/0647F16K5/0689F16K5/08F16K5/201F16K17/168F16K17/164F16K27/067F16K31/14
Inventor 金成波高德明王勇李俊青
Owner HARBIN HBC VALVE
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