A timing gear protection device for a molding machine

Abstract

The invention provides a timing gear protecting device of a forming machine. The timing gear protecting device comprises a limiting switch and a motor control device. The limiting switch is installedon a backward track of a movable roller of the forming machine and composed of a limiting touch plate and a switch body, wherein the switch body is an electric contact switch, and the original state of a pair of electric contacts is a connection state; the motor control device is connected in a power circuit of the forming machine, and the motor control device is an electric connection device which is formed by a forward compression roller instruction relay in the power circuit of the forming machine, contacts of the forward compression roller instruction relay, a backward compression roller instruction relay in the power circuit of the forming machine, contacts of the backward compression roller instruction relay, a detection limiting relay, contacts of the detection limiting relay, a forward maintenance relay, contacts of the forward maintenance relay, a backward maintenance relay, contacts of the backward maintenance relay, a forward maintenance button, a backward maintenance button, a limiting switch, an alarm light, an forward solenoid valve of the forming machine, a backward solenoid valve and a main motor frequency converter of the forming machine. By means of the timing gear protecting device, the gap expanding situation of compression rollers can be reflected in real time, and the situation is avoided that the gap between a fixed roller and a moving roller is excessively expanded, so that equipment failures are caused.

Description

technical field [0001] The invention relates to a protection technology for avoiding damage to the timing gear of a counter-roll forming machine, in particular to a protection device for the timing gear of a forming machine. Background technique [0002] The molding machine is the main equipment in the molding coal process, which is closely related to the quality of the molding coal. The forming machine is generally a double-roll forming machine, including the double-roll forming machine body, uniform material distribution device, supply adjustment device, hydraulic system, and auxiliary equipment such as centralized lubrication. [0003] The main body of the double-roll forming machine includes: lifting frame, pressing roller (that is, forming pair of rollers), timing gear, pressurized oil cylinder and pressure measuring device. The pressing roller and timing gear are the key components of the forming machine. See Figure 1a , the pressure roller is composed of two cylindri...

AI Technical Summary

Problems solved by technology

However, the combination between the gears is limited by the center distance and the gap. Since it is impossible to sieve 100% clean materials in the production of materials, hard substances such as metals and stones in the materials must be mixed in them. Once they are stuck into the rolls of the forming machine In the middle, its hardness far exceeds the forming reaction force. Since the forming roll is made of high-alloy material, in order to balance the two evenly matched, it will inevitably cause expansion between the forming rolls, and the reflected result is the forming roll. The gap expands, and when the gap expands to a certain point, such Figure 1c What is shown is an abnormal state. At this time, the gears of the fixed gear 1 and the movable gear 2 are not completely meshed, and the bending stress on the teeth between the two gears will increase exponentially. When it exceeds the design process Tooth breakage will occur when the check bending stress value of

There have been many similar accidents in the history of briquette production, which caused damage and damage to gears and affected normal production

[0006] At present, the double roll forming machine is only equipped with the structure of the forming roll back function required for the forming roll replacement during the maintenance operation, but it cannot detect the actual state of the forming roll during normal production operations, so when foreign matter enters the pair In roll forming machines, it is not possible to detect when the timing gear of the forming roll is completely disengaged, which can cause the timing gear to be damaged when it is re-engaged

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