Ultra high pressure unloading valve

Abstract

The invention discloses an ultra high pressure unloading valve comprising a valve body. The upper end of the valve body is connected with a detachable cylinder, a piston rod is arranged in the detachable cylinder, a valve core penetrates through the valve body, the piston rod of the cylinder penetrates through the top of the valve body and extends into the valve body, the bottom end of the pistonrod of the cylinder is fixed at the upper end of the valve core, one side of the valve body is provided with a water inlet passage, and the other side of the valve body is provided a water outlet. Anultra-thick valve body capable of withstanding an ultra-high pressure of at least 280 MPa is adopted and a threaded interface is arranged on the valve body to cooperate with a cone face to seal, so that for a high pressure fluid is effectively sealed. At the same time, the valve core adopts a universal cylindrical design and relies on the thrust and the pulling force of the cylinder to control theopening and closing of the valve core, so that an ultra-high pressure fluid is switched between a working channel and a unloading channel, and the problem that the ultra-high pressure unloading valveon domestic equipment is expensive because of relying on the import is solved. The ultra high pressure unloading valve is convenient to use, low in cost and strong in practicability.

Description

technical field [0001] The invention relates to the technical field of unloading valves, in particular to an ultra-high pressure unloading valve. Background technique [0002] The unloading valve is a valve that can unload the high pressure pump under certain conditions. The unloading valve is usually a cut-off valve with an overflow function. Its function is to set the main pressure of the system when it is not unloaded. Returning to the water tank, the output pressure of the high-pressure pump drops to approximately zero to achieve some loop control and prolong the life of the high-pressure pump and reduce energy consumption. The unloading valve is generally set separately in the unloading circuit in the high pressure circuit. The main function of the unloading valve is to automatically control the unloading or loading of the high pressure pump. In view of the function of the unloading valve, it is required that there is a certain pressure difference between the unloadi...

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Problems solved by technology

[0003] At present, unloading valves are used more and more widely in high-pressure water pipelines. However, due to the limitations of domestic materials and processing and assembly levels, the pressure rating of unloading valves used in domestic hydraulic systems is 100 MPa. The following, and most of them are used as safety valves, while the unloading valves for ultra-high pressure systems rely on imports, which are expensive and costly. Therefore, we propose an ultra-high pressure unloading valve to solve the above problems

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