12800results about How to "Improve working environment" patented technology

The invention relates to a positive-pressure pneumatic conveying skid for an oilfield fracturing propping agent. The positive-pressure pneumatic conveying skid for the oilfield fracturing propping agent comprises a skid frame and is characterized in that a fan power-driven system, a gas channel and sand conveying system, a delivery tank assembly, movable feeding devices and an electric control system are arranged on the skid frame. The positive-pressure pneumatic conveying skid for the oilfield fracturing propping agent has the benefits as follows: the occupied area is small, the transportation is convenient, the operation environment and the operation safety are improved, and the efficiency of operation for conveying a material to a high storage tank is improved.

The invention relates to an excavating machine, and especially relates to a compound cantilever excavator. The excavator comprises an excavator body, an excavating mechanism, a travelling mechanism, a hydraulic system, an electrical system, a conveying mechanism and a dedusting system, wherein the excavating mechanism comprises cutting heads and a cutting arm, the cutting heads are positioned on the top of the cutting arm, and the lower part of the cutting arm is movably fixed on the body of the excavator; the travelling mechanism comprises a power machine and a crawler belt positioned under two sides the body of the excavator; and the upper part of the excavating mechanism is provided with an impact fragmenting mechanism, and the impact fragmenting mechanism comprises a hydraulic cylinder and a fragmenting hammer positioned on the top of the hydraulic cylinder. According to the compound cantilever excavator of the invention, service lives of cutting teeth can be prolonged, so the cost of the whole excavator is reduced; the working environment of workers is improved, so the body health of the workers is protected; and the application range of the cantilever excavator is substantially widened, so the cantilever excavator has a wide market prospect.

The invention relates to an automatic quantitative down-filling machine, which comprises a rack, a table surface, a balance, a down tube, a tube cover, an elbow, a hose, a down-filling gun and an automatic control device. The down-filling gun consists of a connecting pipe, an air amplifier, an air amplifier fixing cover, a down-filling pipe and a down-filling gun handle, the automatic control device comprises a down-filling switch, a weighing sensor, a single-chip microcomputer and a solenoid valve; the balance is arranged on the table surface, the down tube is supported on the balance by a bracket and is provided with a down-adding port, the hose is connected with the tube cover through the elbow, an elbow clamping block is fixed on a crossbeam, the down-filling gun is connected with thehose through the connecting pipe, the down-filling switch is arranged on the down-filling gun handle, an air intake pipe connector is connected with the air amplifier in the down-filling gun, and an air intake pipe penetrates through a hole on the down-filling gun handle and is connected with the air intake pipe connector. The invention has the advantages that the quantitative weighing and pneumatic filling of down are realized with the automatic control technology, the down-filing amount can be arbitrarily set, the filling efficiency is high, the working environment is good, and the down waste and damage can be reduced.