Two-way non-return valve adopting electromagnetic-manual dual-control mode

Abstract

The invention discloses a two-way non-return valve adopting an electromagnetic-manual dual-control mode. The two-way non-return valve comprises a valve seat, a valve sleeve, a main valve element, a first spring, a shuttle valve, a damper, a valve body, a two-position two-way pilot solenoid valve and a handle assembly. According to the embodiment of the invention, the two-way non-return valve is reasonable in structure, is low in manufacturing cost, is small in valve element pressure drop, and can adopt the electromagnetic-manual dual-control mode.

Description

technical field [0001] The invention relates to a two-way check valve, in particular to an electromagnetic-manual double-control two-way check valve. Background technique [0002] In modern mechanical equipment and hydraulic systems, a large number of two-way check hydraulic circuits are used. Among them, the two-way stop valve is the key hydraulic component of this type of system. The performance of the two-way stop valve directly affects the performance of the main engine. Existing two-way globe valves are divided into plate type two-way globe valves and cartridge-type two-way globe valves according to the connection method. In order to reduce the installation space and improve system reliability in the system, cartridge-type two-way globe valves are generally used. For example, the patent number is ZL201120147979.7, and the Chinese patent titled "Threaded Plug-in Pilot Normally Closed Double Check Solenoid Valve" discloses an electromagnetic two-way stop valve, including ...

AI Technical Summary

Problems solved by technology

[0003] (1) In order to introduce the highest pressure in the two oil ports into the oil chamber at the rear end of the main valve core and flow the pressure in the oil chamber into the middle and low pressure areas of the two oil ports through the pilot valve core, a first unit is set on the main valve core. One-way damping hole, the second one-way damping hole, the third one-way damping hole, and the fourth damping hole, and corresponding four steel balls, three elastic pins and complex flow channels are arranged, which is difficult to process and high in process cost , Difficult to assemble

[0004] (2) After the pilot spool is opened, the oil in the oil chamber at the rear end of the main spool is selectively discharged into the oil port with the lower pressure among the two oil ports through two steel balls. If there is no back pressure, the opening of the main valve core will be affected, which will cause the pressure drop of the main valve core to be too large and cause serious heat generation.

[0005] (3) When it is operated manually, the operation is complicated and inconvenient, and because the pilot spool is controlled by manual operation, the main spool cannot be directly controlled. When the pilot spool is stuck, the manual function is completely invalid, which reduces the reliability. sex

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