KR-20260063162-A - An anti stick device for coal that can be checked externally and a coal transfer chute including it

Abstract

The present invention relates to an externally verifiable coal adhesion prevention device and a coal conveying chute including the same, wherein the expansion and contraction of an air pad installed inside the chute are verified from the outside of the chute, and the expansion and contraction of the air pad are guided to induce uniform expansion and contraction, as well as mechanically controlling the expansion of the air pad. The externally verifiable coal adhesion prevention device according to the present invention comprises: an air pad (20) installed on the inner surface of a chute (1) and expanding and contracting through the injection and discharge of air to prevent coal from adhering to the chute and to dislodge any adhering coal; and a display rod (30) having one end fixed to the air pad and the other end connected to a hole formed in the chute to allow communication between the inside and outside, so as to be movable back and forth, which indicates the expansion and contraction of the air pad.

Inventors

• 최일호
• 김형준
• 도기윤
• 이상곤
• 김종범

Assignees

• 한국중부발전(주)
• 한전산업개발 주식회사

Dates

Publication Date

20260507

Application Date

20241030

Claims (7)

1. An air pad installed inside the chute that expands and contracts through the injection and discharge of air to dislodge coal adhering to the chute and prevent coal from adhering; A coal adhesion prevention device capable of external verification, characterized by including an indicator rod that indicates the expansion and contraction of the air pad, wherein one side is fixed to the air pad and the other side is connected to a hole formed in the chute to allow communication between the inside and outside, so as to be movable back and forth.
2. An externally verifiable coal adhesion prevention device according to claim 1, characterized by including an expansion control member fixed to the indicator rod in a positionally adjustable manner to control the expansion of the air pad.
3. A coal adhesion prevention device capable of external verification according to claim 2, characterized in that the indicator rod has a screw thread formed on the outer circumference of the other side, and the expansion control member is a nut that is screw-fastened to the screw thread to adjust its position.
4. An externally verifiable coal adhesion prevention device according to claim 1 or claim 2, comprising a position sensor installed outside the chute and detecting the position of the indicator rod, wherein the warning light is controlled according to the detection value of the position sensor or the detection value of the position sensor is transmitted to a portable terminal or server to notify.
5. A coal adhesion prevention device capable of external verification according to claim 1, comprising a fixing member fixed to the back plate of the air pad and penetrating a fastening hole formed in the chute, and a lock nut fastened to the fixing member from the outside of the chute, wherein the fixing member includes a guide hole into which the indicator rod is inserted so as to move back and forth.
6. A coal adhesion prevention device capable of external verification according to claim 1, wherein the indicator rod has a backward color section and a forward color section of different colors formed on its circumference to indicate the operation of the air pad through color.
7. A chute body having a tubular structure with open top and bottom, which guides coal falling from an upper conveying means to fall to a lower conveying means; A coal conveying chute comprising an externally verifiable coal adhesion prevention device according to claim 1, characterized by including an externally verifiable coal adhesion prevention device installed on the inner circumference of the chute body.

Description

An anti-stick device for coal that can be checked externally and a coal transfer chute including it The present invention relates to a coal adhesion prevention device and a chute, and more specifically, to an externally verifiable coal adhesion prevention device that allows verification of the operation of an air pad for adhesion prevention from the outside of the chute while preventing transported materials such as coal from adhering to the chute, and a coal transport chute including the same. Generally, systems for transporting materials such as coal include a chute installed between conveyor belts of different heights to guide the material to fall. For example, the chute has a structure with the upper and lower ends open, and discharges coal falling from the upper conveyor belt onto the lower conveyor belt. During coal transport, significant impact energy is applied to the chute due to falling coal. Since this impact energy damages the chute and requires substantial cost and labor to repair or replace damaged parts, liners are installed on the inner walls of the chute. The liner is made of, for example, wear-resistant steel plate and is installed to be easily replaced even if damaged by impact energy from coal, and is installed, for example, with multiple bolts (hex head bolts, countersunk head bolts, etc.) and nuts. According to conventional chutes, due to the humidity of the cargo, the cargo becomes adhered (attached) to the inside of the chute, specifically the liner. Since the chute is fixed, the attached cargo gradually increases in volume and adheres up to the top of the chute; in severe cases, this blocks the chute, eventually causing transportation obstruction. In order to remove attachments (solidified coal) adhering to the liner of a fixed chute, workers manually removed the attachments using hand tools while the operating conveyor belt was stopped. Consequently, since the attachments inside the chute were removed manually, there were many problems, such as delays in work time and equipment shutdowns that disrupted the smooth supply of raw materials; furthermore, safety accidents occurred, including workers falling or being buried during the operation. Registered Utility Model No. 20-0339835 rotates a liner by expanding and contracting an expansion means through the injection and discharge of air by an air supply means, and Registered Patent No. 10-1666359 includes a liner that protrudes into the interior of a chute by penetrating the air chamber and the front of the air pad from the rear of the air pad. According to the prior art, since the expansion means and the air pad are installed inside the chute and cannot be seen with the naked eye from the outside, the normal operation of the expansion means cannot be verified, and therefore, even if the expansion means (air pad) malfunctions due to damage, it cannot be detected, and thus the prevention and removal of solidified bullets cannot be achieved. Furthermore, due to the lack of technology to guide the expansion and contraction of the air pad, there is a high risk of damage as the pad shifts. In addition, the degree of inflation of the air pad cannot be mechanically controlled. FIG. 1 is a cross-sectional view of a coal conveying chute including an externally verifiable coal adhesion prevention device according to the present invention. FIG. 2 is a rear perspective view of an externally verifiable coal adhesion prevention device according to the present invention. FIG. 3 is a side view of the operating state of an externally verifiable coal adhesion prevention device according to the present invention. FIG. 4 is an example diagram showing an expansion control device applied to an externally verifiable coal adhesion prevention device according to the present invention. FIG. 5 is an example diagram showing a protective tip applied to an air pad of an externally verifiable coal adhesion prevention device according to the present invention. FIG. 6 is an example diagram showing a position detection configuration applied to an externally verifiable coal adhesion prevention device according to the present invention. FIG. 7 is another example of the installation of an indicator rod applied to an externally verifiable coal adhesion prevention device according to the present invention. In the following description of the present invention, specific descriptions of related known functions or configurations will be omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Furthermore, the terms described below are defined in consideration of their functions within the present invention, and these definitions may vary depending on the intentions or practices of the user or operator. Therefore, such definitions should be based on the content throughout this specification. As shown in FIGS. 1 to 3, the externally verifiable coal adhesion prevention device according to the present invention comprises an air