Automatic ascending protection device for drill bit in incoming coal sampling machine

Abstract

The invention discloses an automatic ascending protection device for a drill bit in an incoming coal sampling machine, and belongs to the technical field of equipment of coal sampling machines. The device comprises two vertical gantry frames on two sides of the sampling machine, wherein the lower ends of the vertical gantry frames are arranged on guide rails through rail wheels; the vertical gantry frames are connected with a suspension beam; two ends of the suspension beam are longitudinally and movably arranged through guide columns; the vertical gantry frames above the suspension beam are connected with a cross beam; pressure springs are arranged between the cross beam and the upper surface of the suspension beam; a sampling head transverse movement device and a sampling head rotating and lifting device are connected to the suspension beam; mechanical trigger switches are fixedly arranged under the cross beam above the suspension beam and connected to a control system of the sampling machine. The device is applied to the coal sampling machine and is capable of ensuring the success rate of sampling and reducing sampling failure accidents.

Description

technical field [0001] The invention relates to a protection device for a sampling machine, in particular to an automatic protection rising device for a drill bit of a coal sampling machine entering a factory, and belongs to the technical field of coal sampling machine equipment. Background technique [0002] More than half of the cost of thermal power plants comes from coal combustion, so the quality control and efficient utilization of coal combustion is one of the important ways to save energy and increase efficiency in thermal power generation. At present, all thermal power plants have strict sampling and testing equipment for coal-fired incoming materials and corresponding inspection and management systems to control unqualified coal from the source and enter the next process. Coal-fired sampling is an important part of coal-fired quality control. In the link, a lot of research work has been done on how to sample scientifically and eliminate human factors. Most of the i...

AI Technical Summary

Problems solved by technology

At present, all thermal power plants have strict sampling and testing equipment for coal-fired incoming materials and corresponding inspection and management systems to control unqualified coal from the source and enter the next process. Coal-fired sampling is an important part of coal-fired quality control. In the link, a lot of research work has been done on how to sample scientifically and eliminate human factors. Most of the incoming coal transportation of thermal power plants is by car or train. In order to cooperate with this, a fully automatic sampling machine that can realize fully automatic random sampling has been developed. At present, most of the sampling machines are of gantry structure. There are track wheels under the gantry structure as the longitudinal movement mechanism. The horizontal movement mechanism and the up and down movement mechanism are arranged on the beam of the gantry structure. The common up and down movement mechanisms are screw type and hydraulic type. The sampling head is connected to the moving mechanism. The sampling head is commonly drilled and opened at the bottom. The whole system adopts PLC automatic control. There is a counting device in the three-dimensional moving mechanism. Just click the mouse to start the three-dimensional moving mechanism of the sampling machine. Sampling will be automatically completed according to the points set by the system. This sampling machine has achieved scientific and objective sampling to a large extent and avoided human interference. However, there are often rock materials with high hardness in the incoming materials. , or the sampling site is just located in the reinforcement rib of the vehicle box, the side of the car or other hard places. At this time, when the drill bit touches these items, the drill bit cannot be lowered, but the control system cannot recognize this situation, so that the up and down movement mechanism still When the downward force is applied to the drill bit, the drill bit will push against the hard object to raise the entire gantry, which will seriously cause the overall derailment of the sampling machine and other safety accidents, such as damage to the transport vehicle and injury to personnel, etc. It will also cause damage to the drill bit. At present, relevant technical personnel have developed an intelligent device that automatically raises the drill bit when it hits the side of the car, reinforcing ribs and other metal objects. The machine has announced a technical solution, which adopts the circuit principle. When the sampling head touches metal conductive objects such as car sides and reinforcing ribs, a circuit is triggered, and the trigger circuit gives a signal to protect the drill bit from rising. This technical solution is to a certain extent Overcome and solve this problem, but when the drill bit hits a non-metallic hard object, the technical solution cannot realize effective operation, and a comprehensive and reliable automatic protection of the drill bit of the sampling machine is needed in the coal sampling machine for thermal power generation in China Riser

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