Hydraulic-control differential pressure system of plunger pump type cold-paint road marking machine

Abstract

A hydraulic-control differential pressure system of a plunger pump type cold-paint road marking machine comprises a hydraulic pump, a high-pressure plunger pump, an automatic reciprocating cylinder, a hydraulic oil tank and an energy accumulator which are all arranged on a frame of the plunger pump type cold-paint road marking machine. An inlet of the hydraulic pump is connected with the hydraulic oil tank through an oil pipe; an outlet of the hydraulic pump is connected with the automatic reciprocating cylinder through an oil pipe; both the automatic reciprocating cylinder and the high-pressure plunger pump are arranged vertically and the automatic reciprocating cylinder is right above the high-pressure plunger pump; the lower end of a piston rod of the automatic reciprocating cylinder is hinged to the upper end of a plunger rod of the high-pressure plunger pump; a discharge outlet of the high-pressure plunger pump is connected with the energy accumulator through a discharging pipe. The hydraulic-control differential pressure system is simple in structure, long in service life and low in equipment failure rate, and further is high in construction efficiency and convenient to operate and steer due to the fact that the control system is less prone to being affected by equipment vibration and external signals.

Description

technical field [0001] The invention belongs to the field of highway auxiliary equipment, and in particular relates to a hydraulic control differential pressure system of a plunger pump type room temperature marking machine. Background technique [0002] The traditional hand-push marking machine at room temperature adopts diaphragm pump type and plunger pump type. The working principle of diaphragm pump determines its short working life and high failure rate; Electronic control must be used. At this time, electric control components such as motors, batteries, and controllers need to be added to the overall equipment, so that the weight of the entire hand-push equipment will increase, which is not conducive to use. Moreover, this electronic control method is affected by equipment vibration and external signals. Influence, the control system is prone to problems, which seriously affects the efficiency of marking construction; therefore, most of the domestic marking industry ad...

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Problems solved by technology

[0002] The traditional hand-push marking machine at room temperature adopts diaphragm pump type and plunger pump type. The working principle of diaphragm pump determines its short working life and high failure rate; Electronic control must be used. At this time, electric control components such as motors, batteries, and controllers need to be added to the overall equipment, so that the weight of the entire hand-push equipment will increase, which is not conducive to use. Moreover, this electronic control method is affected by equipment vibration and external signals. Influence, the control system is prone to problems, which seriously affects the efficiency of marking construction; therefore, most of the domestic marking industry adopts the diaphragm pump type that has been eliminated abroad; the traditional marking machine uses electromagnetic induction to control the reciprocating motion of the hydraulic cylinder, which will be subject to equipment vibration Due to the influence of external signals, the frequency of problems in the control system is high, so the marking construction efficiency is low; the linear control of the traditional hand-push room temperature marking machine is manually controlled. If the rotary encoder is used, it is necessary to add complicated equipment to the equipment Gear mechanism, such equipment is not only complicated but also requires very high quality of the operator, and the failure rate is high; in view of the above problems, how to improve the existing normal temperature hand-push marking machine has become a technical problem that needs to be solved urgently

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