Acid gun lifting device with monitoring and protection functions

Abstract

The invention relates to an acid gun lifting device with monitoring and protection functions. The acid gun lifting device comprises an acid gun, an air cylinder, a steel wire rope and a controller, a movable pulley is arranged on a push rod of the air cylinder; one end of the steel wire rope is connected with the tail of the acid gun; the other end of the steel wire rope passes through the movable pulley and is fixed; more than one fixed pulley for steering is arranged along the steel wire rope; the tail of the acid gun cooperates with an acid gun slideway; an acid gun protecting sleeve is arranged below the head of the acid gun; inductive switches are arranged at two ends of the stoke of the air cylinder respectively; the bottom of one of the fixed pulleys presses against a pressure sensor; a rod chamber and a rodless chamber of the air cylinder are connected with two air cylinder openings of a neutral-position-closed type three-position solenoid valve through air pipes respectively; exhaust openings of the neutral-position-closed type three-position solenoid valve are connected with exhaust throttle valves through air pipes; an air inlet of the neutral-position-closed type three-position solenoid valve is connected with an air source through an air pipe; and the inductive switches, the pressure sensor, the neutral-position-closed type three-position solenoid valve and the exhaust throttle valves are connected with a controller respectively. The acid gun lifting device can monitor whether the acid gun is lifted and descended normally and whether the acid gun is lifted and descended in place, and can realize stable lifting and abnormality stop.

Description

technical field [0001] The invention belongs to the field of acid regeneration by spray roasting method, and in particular relates to an acid gun lifting device with monitoring and protection functions. Background technique [0002] The waste acid (such as hydrochloric acid or mixed acid composed of hydrofluoric acid and nitric acid) produced by iron and steel or chemical enterprises is generally regenerated by spray roasting method, that is, an acid gun is installed on the top of the roasting furnace, and the acid gun is sent to the roasting furnace through the acid gun. The internal spray acid mist reacts to obtain related products. The lifting of the acid gun is generally completed by the acid gun lifting device. The acid gun lifting device generally includes the acid gun, cylinder, steel wire rope and controller. The cylinder points downward and the cylinder push rod is equipped with a movable pulley. Pass through the movable pulley and fix it. There are more than one s...

AI Technical Summary

Problems solved by technology

[0003] At present, magnetic induction switches are installed at both ends of the stroke of the cylinder to indirectly detect whether the acid gun is in the gun lifting position or the gun lowering position by detecting the extension and retraction positions of the cylinder, but this indirect detection method has the following problems: 1) In the initial stage of lowering the gun, if the acid gun shakes, the tip of the acid gun will be stuck on the insertion port of the acid gun. When the gun is stuck down and no one finds it, the cylinder will continue to retract to the gun lowering position. The magnetic sensor switch of the gun lowering position has a signal output. The system thinks that the acid gun has been lowered in place through the magnetic sensor switch on the cylinder, and starts to spray acid At this time, the waste acid drips along the acid gun protective sleeve, crystallizes in the acid gun protective sleeve, corrodes the acid gun protective sleeve and other equipment, and produces unqualified iron oxide powder. If the steel wire rope falls out of the groove, it needs to be threaded again, which is a complicated operation; 2) If the acid gun is stuck on the acid gun slide when the gun is lifted, the gun head is in the acid gun protective sleeve. If it is not handled in time, it will lead to high temperature The smoke burns nozzles, sealing rings, and even acid gun nozzle plates and other equipment, causing safety hazards

[0004] In view of the above problems, at present, the patent application No. 200620096431.3 discloses a "anti-misoperation acid gun lifting device", which can solve the problem of abnormal operation of equipment caused by external compressed air fluctuations and leakage of cylinders or solenoid valves. Misoperation problems such as lifting or lowering, but unable to monitor the state of the acid gun during the rising or falling process

The patent application number 201020297543.1 discloses a "acid gun lifting device for hydrochloric acid regeneration system". Solve the problem of wire rope de-grooving caused by continuous retraction of the cylinder when the acid gun lowering gun is stuck. At the same time, this solution directly installs a tension detection device on the wire rope. The working method of the tension detection device is not given, because the wire rope is in motion during work. , its pulling force is difficult to detect directly

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