Blocking detection device for blanking pipe of bulk material conveyor

Abstract

The invention relates to a blocking detection device for a blanking pipe of a bulk material conveyor. The blocking detection device is used for detecting whether the blanking pipe is blocked or not. The blocking detection device is characterized in that the blanking pipe comprises a first side plate and a second side plate which are oppositely arranged; the blocking detection device comprises a detection chain arranged in the blanking pipe, a reciprocating driving assembly used for driving the detection chain to reciprocate and a moving sensing assembly used for detecting the moving state of the chain; one end of the detection chain penetrates through the first side plate to be connected with the reciprocating driving assembly, and the other end of the detection chain penetrates through the second side plate to be connected with the moving sensing assembly; and the detection chain comprises a plurality of blanking detection pieces arranged at intervals and a connecting chain used for being connected with the blanking detection pieces. Compared with the prior art, the blocking detection device has the advantages that the detection chain, the reciprocating driving assembly and the moving sensing assembly are matched to detect the blocking condition of the blanking pipe, the detection result can reflect the blocking condition of materials in the blanking pipe more truly, detection is accurate, and the response is sensitive.

Description

technical field [0001] The invention relates to a detection device for a drop tube, in particular to a material blocking detection device for a drop tube of a bulk material conveyor. Background technique [0002] The belt conveyor is a common equipment for bulk material transportation. The conveyor belt transports the material to the next level of the conveyor belt. The drop pipe is the main equipment connecting the upper and lower conveyors. During the process of conveying materials, often due to high viscosity and high humidity , or due to the failure of the electrical control system of the upper and lower belt conveyors, material blockage occurs in the discharge pipe. A large amount of material leaks from the inlet of the drop pipe, and the leaked material will enter the various rotating parts of the conveyor. As the leaked material accumulates, equipment damage will eventually occur, such as: conveyor drive or conveying In the case of belt damage, even due to material l...

AI Technical Summary

Problems solved by technology

However, in actual operation, it often happens that the detection device does not operate when the material is blocked when the material is blocked by the falling pipe, that is, the phenomenon of material blocking is not detected. The main reason is that the accumulation of materials in the material is not uniform. The material at the detection device is not in contact with the square sheet of the detection device, resulting in the failure of the detection device to send a signal, and the detection device fails; in addition, the blade of the detection device is often impacted or touched by the block in the material. Damage, the common damage is that the square metal sheet falls off or deforms, or the shaft of the detection device is damaged, and the material blocking detection device is scrapped; in the third case, due to the loose material, even if the material of the falling pipe is blocked, the detection device will fail. The rotating shaft can still drive the square sheet to rotate

The high-frequency occurrence of these situations makes the protection device really play a small role, and accidents of serious damage to coal handling equipment caused by material overflow occur from time to time, which also shows that the traditional blocking material detection device is effective for different types of coal. Different detection characteristics, for some types of coal, the detection ability of traditional detection devices is very limited

[0005] There is another situation: due to the poor environmental conditions of the rotating motor and the blades, some large-grained materials may jam the blades during the conveying process, causing the blocking detection device to send a signal by mistake, resulting in the shutdown of the conveying system. These phenomena are serious. Affect the normal operation of the conveying system and the service life and maintenance cost of the belt conveyor

[0006] The above situations will lead to the failure of the traditional blocking detection device to detect the occurrence of material blocking in the discharge pipe, or the vulnerability of the detection device itself

[0007] The material blocking detection device of the falling pipe is a kind of protection device in the conveying system, which needs to be checked regularly. The traditional checking method is to manually insert the hand or tool into the falling pipe to force the square metal sheet to stop rotating, so as to detect Whether the signal feedback is normal, obviously this method is relatively troublesome

[0008] Since the traditional blocking detection device detects the blocking state of a point in the falling pipe, it is very difficult to determine the blocking state of the entire falling pipe through the state of this point. As a result, it is extremely difficult to select the installation position of the traditional material blocking detection device on the discharge pipe. Even if a position is found, the detection device may not be able to reflect the state of the discharge pipe correctly and even due to changes in the type of coal, resulting in Various accidents of conveying equipment

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