Piston lubricating system for concrete cylinder, control method and device thereof, and pumping equipment

Abstract

The invention relates to the technical field of engineering machines, and discloses a piston lubricating system for a concrete cylinder, a control method and device thereof, and pumping equipment. Air flushing can be carried out on a lubricating pipeline, so that blockage of the lubricating pipeline and a lubricating hole is prevented, smooth lubrication on a piston of the concrete cylinder is guaranteed, and the abrasion risk of the concrete cylinder is further reduced. The piston lubricating system for the concrete cylinder comprises a lubricating oil pump, the concrete cylinder with the lubricating hole and a hydraulic lubricating device, wherein the hydraulic lubricating device is provided with an oil inlet and an oil outlet, and the oil inlet is connected with the lubricating oil pump. The piston lubricating system is characterized by further comprising an air source, a pressure-controlled switching valve and a switching valve, wherein the pressure-controlled switching valve is provided with a first inlet, a second inlet and an outlet, the first inlet is connected with the oil outlet of the hydraulic lubricating device, and the outlet is connected with the lubricating hole; an air inlet of the switching valve is connected with the air source, and an air outlet of the switching valve is connected with the second inlet; when the switching valve is connected, air of the air source enters the lubricating hole through the pressure-controlled switching valve.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a piston lubrication system for a concrete cylinder, a control method, a device and pumping equipment thereof. Background technique [0002] Concrete pumps and concrete pump trucks are widely used for concrete delivery in large concrete factories such as high-rise buildings, highways, and overpasses. It is mainly realized by the main oil pump, two main oil cylinders, two concrete cylinders, S valve and swing cylinder. The main oil pump controls two The pistons of the two main cylinders move in the opposite direction, and the pistons of the two concrete cylinders are driven to move in the opposite direction, so that the concrete is sucked into the rodless chamber of the concrete cylinder or the concrete in the rodless chamber is pushed into the inlet of the S valve. The feed port and the S valve are driven by the swing cylinder, and alternately communicate with the r...

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Problems solved by technology

[0004] The defect in the existing technology is that during the working process of concrete pumps and concrete pump trucks, the lubrication system mainly relies on the instantaneous pressure of the lubricating oil itself to flush the lubrication pipes. However, when the lubrication hole of the concrete cylinder is severely blocked, the double line The lubricant distributor is not working properly, which prevents the piston of the concrete cylinder from being lubricated, increasing the risk of wear on the concrete cylinder

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