CN-122009838-A - Automatic control device and method for double-layer ash discharge valve of large flue of sintering machine

CN122009838ACN 122009838 ACN122009838 ACN 122009838ACN-122009838-A

Abstract

The invention relates to an automatic control device and method for a double-layer ash discharge valve of a large flue of a sintering machine, wherein the automatic control device for the double-layer ash discharge valve of the large flue of the sintering machine comprises a feeding hopper, the feeding hopper is arranged right below the large flue, the lower end of the feeding hopper is communicated with the double-layer ash discharge valve, a material conveying mechanism is arranged below the double-layer ash discharge valve, a material guide opening is formed in the side wall of the feeding hopper, a material guide pipe is communicated with the material guide opening, the material guide pipe is obliquely downwards arranged, a swing arm type limit switch is arranged right below a port of the material guide pipe at the lower side, a vibrating mechanism is fixedly arranged on the outer wall of a drainage tube, and the automatic control device further comprises a control system which is simultaneously and electrically connected with the vibrating mechanism, the swing arm type limit switch and the double-layer ash discharge valve.

Inventors

WAN BIAO
MENG FANTING
LI CHENGYUAN

Assignees

中天钢铁集团(南通)有限公司
中天钢铁集团有限公司

Dates

Publication Date: 20260512
Application Date: 20260320

Claims (7)

1. The automatic control device for the double-layer ash discharge valve of the large flue of the sintering machine is characterized by comprising a feeding hopper, wherein the feeding hopper is arranged right below the large flue, the lower end of the feeding hopper is communicated with the double-layer ash discharge valve, a material conveying mechanism is arranged below the double-layer ash discharge valve, a material guide opening is formed in the side wall of the feeding hopper, a material guide pipe is communicated with the material guide opening, the material guide pipe is arranged obliquely downwards, a swing arm type limit switch is arranged right below a port of the material guide pipe, a vibrating mechanism is fixedly arranged on the outer wall of a drainage tube, a blockage monitoring mechanism is fixedly arranged in the middle of the inner wall of the drainage tube, and the automatic control device is electrically connected with the vibrating mechanism, the swing arm type limit switch, the double-layer ash discharge valve and the blockage monitoring mechanism.
2. The automatic control device for a double-layer ash valve of a large flue of a sintering machine according to claim 1, wherein a small hopper is arranged at a port of the lower side of the drainage tube.
3. The automatic control device for the double-layer ash valve of the large flue of the sintering machine according to claim 2, wherein a grid net is arranged at the joint of the drainage tube and the feeding hopper.
4. The automatic control device for the large flue double-layer ash valve of the sintering machine according to claim 3, wherein the drainage tube is a wear-resistant steel tube, and a ceramic wear-resistant layer is arranged on the inner wall of the drainage tube.
5. The automatic control device for the double-layer ash valve of the large flue of the sintering machine according to claim 4, wherein the control system is a PLC control system.
6. The automatic control device for the double-layer ash valve of the large flue of the sintering machine according to claim 5, wherein the vibration mechanism comprises a hoop fixing structure and a vibration motor, and the vibration motor is fixedly connected with the hoop fixing structure.
7. An automatic control method for a large flue double-layer ash valve of a sintering machine, which is used for the automatic control device for the large flue double-layer ash valve of the sintering machine according to any one of claims 1 to 6, and is characterized by comprising the following steps: Acquiring drainage tube blockage information through a blockage monitoring mechanism, judging whether the drainage tube is blocked according to the drainage tube blockage information, if so, starting the vibration mechanism, if not, keeping the vibration mechanism closed, And acquiring a material level signal and a swing arm type limit switch signal, judging whether the material level signal reaches the preset material level and whether the swing arm type limit switch is opened simultaneously, if so, opening the double-layer ash discharge valve, and if not, keeping the closing state of the double-layer ash discharge valve.

Description

Automatic control device and method for double-layer ash discharge valve of large flue of sintering machine Technical Field The invention relates to the technical field of ore grinding equipment, in particular to an automatic control device and method for a double-layer ash discharge valve of a large flue of a sintering machine. Background The invention relates to a large flue bulk cargo discharging technology in a sintering process in the metallurgical industry, in particular to an automatic control device and method for a double-layer ash discharging valve of a large flue of a sintering machine based on material level detection, which are suitable for automatic transformation of a large flue discharging system of the sintering machine. The core advantage of the change to level-based control (low level operation) is that the ash discharge mode is changed from a timed cycle to an on-demand operation, and unnecessary equipment actions and manual intervention are reduced fundamentally. The large flue of the sintering machine can collect a large amount of sinter bulk materials in the operation process, and the bulk materials are discharged periodically through a double-layer ash discharging valve. At present, most of common ash discharging modes are manual timing control or timing automatic control. However, the two control modes have the problems of high labor intensity, untimely response, easy ash discharge or empty discharge and the like; Automatic position operation, high-frequency start-stop and continuous material flushing, which leads to serious abrasive particle abrasion and impact abrasion. The large-particle sinter continuously impacts the surface of the valve plate, so that material damage and stress concentration are caused, and abrasion is accelerated. Is easy to cause unsmooth ash discharge and blockage. The ash is closed without being discharged in a short period, and the ash bin is easy to suspend and agglomerate. The valve is not tightly closed, so that continuous air leakage can be caused, the sintering process can be influenced, the negative pressure of a large flue can be destroyed, the energy consumption of a main exhaust fan can be increased, and the quality of the sintered ore can be influenced. Frequent material blocking necessarily requires manual frequent material passing. Under the condition that the equipment is not completely isolated and the monitoring is not in place, serious casualties such as material breakage, extrusion and the like easily occur when the material is poked manually. The application provides an automatic control device and method for a double-layer ash discharge valve of a large flue of a sintering machine, which are used for solving the problems. Disclosure of Invention The invention mainly aims to solve the problems of serious abrasive particle abrasion and impact abrasion caused by automatic running, high-frequency starting and stopping and continuous material flushing in the prior art. The large-particle sinter continuously impacts the surface of the valve plate, so that material damage and stress concentration are caused, and abrasion is accelerated. Is easy to cause unsmooth ash discharge and blockage. The ash is closed without being discharged in a short period, and the ash bin is easy to suspend and agglomerate. The valve is not tightly closed, so that continuous air leakage can be caused, the sintering process can be influenced, the negative pressure of a large flue can be destroyed, the energy consumption of a main exhaust fan can be increased, and the quality of the sintered ore can be influenced. Frequent material blocking necessarily requires manual frequent material passing. Under the condition that the equipment is not completely isolated and the monitoring is not in place, the problems of serious casualties such as material collapse, extrusion and the like easily occur in manual material poking. The invention provides an automatic control device and method for a large flue double-layer ash valve of a sintering machine, wherein the automatic control device for the large flue double-layer ash valve of the sintering machine comprises the following components: The feeding hopper, the feeding hopper sets up under big flue, the lower extreme and the double-deck ash discharge valve of feeding hopper are linked together, the below of double-deck ash discharge valve is provided with fortune material mechanism, the guide mouth has been seted up on the lateral wall of feeding hopper, guide mouth department intercommunication has the passage, the passage sets up downwards to one side, install swing arm formula limit switch under the port department that the passage is located the downside, fixed mounting has vibration mechanism on the outer wall of drainage tube, still include control system, control system is simultaneously with vibration mechanism, swing arm formula limit switch, double-deck ash discharge valve are simultaneously electric connection. Optio