Grouting pump safety valve

Abstract

The invention relates to the technical field of grouting pumps, and in particular relates to a grouting pump safety valve which comprises a valve core, a spring and a valve body; the valve body is internally provided with a spring chamber, a valve core chamber and a pressure chamber which are communicated sequentially; the spring is arranged in the spring chamber; the valve core is arranged in the valve core chamber, one end of the valve core is inserted into the end part of the spring chamber and is elastically connected with the spring, and the other end of the valve core is provided with a frustum body and is in contact and connected with the end part of the pressure chamber; and the valve body has a pressure hole communicated with the pressure chamber and a grout discharge hole communicated with the valve core chamber. According to the invention, great pressure in grout liquids can be relieved; applied force acting on the valve core changes tiny, and has low rigidity requirement on the spring; the valve port diameter can be expanded, and the hazard of valve port blocking is removed; and moreover, the pitch of the spring can be increased, and under the equal applied force, the stroke is lengthened, and full-quantity unload can be ensured under the condition of grouting pipeline blocking.

Description

technical field [0001] The invention relates to the field of grouting pumps, in particular to a safety valve for a grouting pump. Background technique [0002] For the safety valve used on the existing grouting pump, when the grout pressure is higher, the force will be greater, and the rigidity of the spring will be higher. Therefore, the higher the pressure, the larger the volume of the spring. In order to limit the safety The volume of the valve can only reduce the diameter of the valve port. If the diameter of the valve port is too small, the safety valve can only play a warning role and cannot be fully unloaded when the grouting pipeline is blocked. Moreover, due to the particularity of the grout, If the valve port is too small, it will cause blockage, the safety valve cannot be opened in time, and there are potential safety hazards. Contents of the invention [0003] The purpose of the present invention is to solve the above technical problems, and to provide a safet...

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Problems solved by technology

[0002] For the safety valve used on the existing grouting pump, when the grout pressure is higher, the force will be greater, and the rigidity of the spring will be higher. Therefore, the higher the pressure, the larger the volume of the spring. In order to limit the safety The volume of the valve can only reduce the diameter of the valve port. If the diameter of the valve port is too small, the safety valve can only play a warning role and cannot be fully unloaded when the grouting pipeline is blocked. Moreover, due to the particularity of the grout, If the valve port is too small, it will cause blockage, the safety valve cannot be opened in time, and there will be safety hazards

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