Diaphragm type pulsation damper with high pressure resistance

Abstract

The invention relates to a diaphragm type pulsation damper with high pressure resistance, which comprises a first shell and a second shell, a first cavity is arranged in the first shell, a second cavity is arranged in the second shell, a diaphragm piece for isolating the first cavity from the second cavity is arranged between the first shell and the second shell, and the diaphragm piece is arranged in the first cavity and the second cavity. A first limiting block is arranged in the first shell and provided with a first through hole used for being communicated with the first cavity, the first limiting block is provided with a first film protection device, a first reset spring is arranged between the first limiting block and the first film protection device, and a second limiting block is arranged in the second shell and provided with a second reset spring. The second limiting block is provided with a second through hole used for being communicated with the second cavity, the second limiting block is provided with a second film protecting device, a second reset spring is arranged between the second limiting block and the second film protecting device, and the pulsation damper has the good high-pressure-resistant capacity.

Description

【Technical field】 [0001] The invention relates to a diaphragm type pulsation damper with high pressure resistance, belonging to the technical field of fluid equipment. 【Background technique】 [0002] Pulsation damper is a kind of auxiliary equipment widely used in the pipeline hydraulic system of petrochemical, environmental protection, chemical industry, sewage treatment and other industries. It is usually used to reduce the unevenness of discharge flow of reciprocating pumps (such as reciprocating pumps and metering pumps). And reduce the hydraulic shock of the pipeline system (such as water hammer effect). [0003] At present, the existing pulsation dampers can be divided into three types: gas-liquid contact type (or direct contact type), air bag type, and diaphragm type according to their structural forms. When the gas-liquid contact structure is used, the pipeline medium and the gas (nitrogen or air) in the damper cavity are in direct contact, so it is not suitable for...

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Problems solved by technology

When the gas-liquid contact structure is used, the pipeline medium is in direct contact with the gas (nitrogen or air) in the damper cavity, so it is not suitable for the working conditions of dangerous medium; the airbag structure can separate high-risk medium and gas through the built-in capsule, which can play a role It has the function of isolation and protection, but limited by the material of the capsule, it cannot be used in the working condition of high-temperature medium (such as 170°C); the common diaphragm structure in the market is usually not suitable for high-pressure working conditions due to the influence of sealing performance.

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