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Cut-off non-return differential pressure valve

A differential pressure valve and non-return technology, which is applied in the direction of valve devices, engine components, mechanical equipment, etc., can solve the problems that the unit cannot be exhausted outside, unfavorable equipment reliability, and poor equipment appearance, etc., and achieves small resistance loss and excellent structure. Simple, effective cooling performance improvement

Inactive Publication Date: 2008-01-23
YANTAI MOON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3. For compressors that use differential pressure oil supply, in order to ensure that the compressor is cooled and lubricated in a timely manner after starting, when the normal suction and exhaust pressure difference has not been established, the unit must not exhaust outwards
At present, the conventional method for domestic products to solve the above three problems is to install a shut-off valve and a check valve at the air outlet of the compressor. This will cause high equipment cost, complicated operation, poor appearance of the equipment, and is not conducive to the overall operation of the equipment. reliability

Method used

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  • Cut-off non-return differential pressure valve

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Embodiment

[0015] Embodiment: a cut-off check differential pressure valve (see accompanying drawing), which is provided with a valve seat 1, the lower end of the valve seat 1 is provided with a cavity 12, the cavity 12 is connected to c cavity, and the right side is provided with a cavity 13, Cavity port 13 is connected to cavity b, valve seat 1 is connected to valve body 4, valve body 4 is provided with cavity port 14, cavity port 14 is connected to cavity a, valve body 4 is connected to cylinder liner 3, and cylinder liner 3 is provided with piston 9, piston 9 There is a sealing ring 10 on the top, the piston 9 can move back and forth in the cylinder liner 3, the piston 9 is inlaid with soft sealing material, the piston 9 is connected to the piston rod 8, the piston rod 8 is covered with a spring 7, and the upper part of the piston rod 8 is connected Position screw 6, the limit screw 6 is provided with an adjustment rod 5, the adjustment rod 5 can move up and down in the limit screw 6, ...

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Abstract

Present invention discloses a cut-off non-return pressure-differentially-set valve. It contains valve base with opening, valve body with opening, cylinder sleeve with piston, piston draw bar, spring, regulation stem set on upper of piston draw bar, valve head drawbar, valve head etc. Said invention makes unit assembly operation more convenient more convenient, economic, and reliable.

Description

Technical field: [0001] The invention relates to a cut-off non-return differential pressure valve, which belongs to the field of refrigeration and air-conditioning systems. Background technique: [0002] 1. The compressor is an independent device in the refrigeration system. For operation and maintenance, it must be connected with the system with a stop valve. 2. When the compressor stops running, in order to prevent the compressor from reversing and high-pressure gas from entering the compressor, a check valve must be added at the outlet. 3. In order to ensure timely cooling and lubrication of compressors that use differential pressure oil supply, the unit must not exhaust outwards when a normal suction and exhaust pressure difference has not been established. At present, the conventional method for domestic products to solve the above three problems is to install a shut-off valve and a check valve at the air outlet of the compressor. This will cause high equipment cost, c...

Claims

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Application Information

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IPC IPC(8): F16K99/00
Inventor 李华伟肖文选
Owner YANTAI MOON
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