Overload protective valve and overload valve comprising same

Abstract

The invention discloses an overload protective valve and an overload valve comprising the overload protective valve and relates to the technical field of engineering machinery. The overload protective valve comprises a valve sleeve and a pressure-regulating lead screw. The overload protective valve is characterized in that the rear end of the valve sleeve is connected with a valve sleeve base, the front end of a pressure-regulating valve seat is provided with external threads, the front end of the pressure-regulating valve seat is connected and fixed to the inner side of the rear end of the valve sleeve seat through the threads, and the pressure-regulating lead screw penetrates through the pressure-regulating valve seat to extend into the valve sleeve seat; a spring is arranged on the inner side of the valve sleeve seat between a valve element and the pressure-regulating valve seat. The overload protective valve aims to solve the problems that in the prior art, when an overload relief valve operates, the overflowing speed is low or operation fails, so that a controlled component is damaged, and the problem that the overload relief valve cannot replenish oil to a large cavity of the system, so that oil replenishment needs external assistance and the enterprise cost is increased is solved at the same time. The overload protective valve has the advantages of being simple in structure, good in opening and closing performance, high in overflowing speed, long in service life, capable of conducting oil replenishment work and the like. The invention further provides the overload valve comprising the overload protective valve.

Description

technical field [0001] The invention relates to the technical field of construction machinery, in particular to an overload protection valve and an overload valve including the overload protection valve. Background technique [0002] Hydraulic valve is an automatic component operated by pressure oil. It is controlled by pressure oil of pressure distribution valve. It is usually used in combination with electromagnetic pressure distribution valve and can be used to remotely control the on-off of oil, gas and water pipeline systems in hydropower stations. Among them, the pressure control valve is also called the pressure control valve. The relief valve in the pressure control valve can control the hydraulic system to maintain a constant state when the set pressure is reached. The relief valve used for overload protection is called overload safety valve. When the system fails and the pressure rises to a limit value that may cause damage, the valve port of the overload safety v...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the overflow speed is slow or unable to work when the medium-load safety valve in the prior art is working, resulting in damage to the controlled components, resulting in large economic losses and safety accidents

At the same time, in order to solve the problem that the overload safety valve does not have the function of replenishing oil to the large cavity of the system, it needs external assistance to replenish oil, consumes energy, and increases the cost of the enterprise

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