Counter pressure type valve body assembly

Abstract

The invention discloses a counter pressure type valve body assembly, comprising a valve shell. The upper end of the valve shell is arranged as an inlet end, a sealing plate is also arranged at the inlet end of the valve shell, and valve holes are arranged in the sealing plate; the lower middle part of the valve shell is also provided with outlet pipes arranged transversely, and the outlet pipes communicate with a valve cavity in the valve shell; and a driving cylinder is also mounted at the lower end of the valve shell. According to the invention, the closing and opening of the valve holes arerealized through counter pressure of the valve holes in the sealing plate and a moving plate, the valve holes are arranged in the sealing plate and the moving plate, when the moving plate moves downwards and a gap is formed between the moving plate and the sealing plate, thus a passage is formed from the inlet end to the valve holes and then to the outlet pipes, and a valve body passage is opened. The device can realize the opening and closing of the valve body passage, the structure is simple, the operation is convenient, and the device is suitable for opening and closing a liquid valve bankor a gas valve bank.

Description

technical field [0001] The invention relates to a valve part, in particular to a counter-pressure valve body assembly. Background technique [0002] The existing common valve body assembly is usually set up as a single-channel structure, one valve controls one channel, so the structure is simple and the operation is very convenient; in addition, there is a double-gate valve body structure, which needs to be driven by a driving cylinder. The gate closes the valve, and the structure is relatively complicated; there is also a push-pull valve structure that can be driven by the cylinder to push the pressure plate to press the valve port to complete the opening and closing of the valve; but the push-type structure is usually not airtight. The compression fit of the hole is not tight enough, and the ventilation and closing form of the valve hole is too simple, resulting in poor airtightness. Contents of the invention [0003] The object of the present invention is to provide a ...

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Problems solved by technology

[0002] The existing common valve body assembly is usually set up as a single-channel structure, one valve controls one channel, so the structure is simple and the operation is very convenient; in addition, there is a double-gate valve body structure, which needs to be driven by a driving cylinder. The gate closes the valve, and the structure is relatively complicated; there is also a push-pull valve structure that can be driven by the cylinder to push the pressure plate to press the valve port to complete the opening and closing of the valve; but the push-type structure is usually not airtight. The compression fit of the hole is not tight enough, and the ventilation and closing form of the valve hole is too simple, resulting in poor airtightness

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