KR200267277Y1 - Apparatus for cleaning of fallen ore of belt-conveyor - Google Patents
Apparatus for cleaning of fallen ore of belt-conveyor Download PDFInfo
- Publication number
- KR200267277Y1 KR200267277Y1 KR2020010039526U KR20010039526U KR200267277Y1 KR 200267277 Y1 KR200267277 Y1 KR 200267277Y1 KR 2020010039526 U KR2020010039526 U KR 2020010039526U KR 20010039526 U KR20010039526 U KR 20010039526U KR 200267277 Y1 KR200267277 Y1 KR 200267277Y1
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- South Korea
- Prior art keywords
- belt
- plate
- belt conveyor
- support shaft
- falling
- Prior art date
Links
- 238000004140 cleaning Methods 0.000 title description 3
- 238000001514 detection method Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract description 10
- 239000002994 raw material Substances 0.000 description 5
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G45/00—Lubricating, cleaning, or clearing devices
- B65G45/10—Cleaning devices
- B65G45/12—Cleaning devices comprising scrapers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
- B08B1/16—Rigid blades, e.g. scrapers; Flexible blades, e.g. wipers
- B08B1/165—Scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B1/00—Cleaning by methods involving the use of tools
- B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G43/00—Control devices, e.g. for safety, warning or fault-correcting
- B65G43/08—Control devices operated by article or material being fed, conveyed or discharged
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/02—Control or detection
- B65G2203/0208—Control or detection relating to the transported articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2203/00—Indexing code relating to control or detection of the articles or the load carriers during conveying
- B65G2203/04—Detection means
- B65G2203/042—Sensors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Conveyors (AREA)
Abstract
본 고안은 리턴벨트를 통해 실려오는 낙광의 오버플로우를 방지하는 벨트컨베이어의 낙광 방지장치를 제공하는 데 목적이 있다.The object of the present invention is to provide a fall prevention device of the belt conveyor to prevent the overflow of falling light coming through the return belt.
따라서, 본 고안은 벨트컨베이어의 이송도중 리턴벨트에 떨어진 낙광을 제거하는 벨트컨베이어의 낙광 제거장치에 있어서, 리턴벨트를 가로질러 설치되는 고정빔과, 고정빔에 하방으로 연장 설치되는 지지축과, 지지축에 리턴벨트의 진행방향으로 고정 설치되는 중앙판, 지지축을 축중심으로하여 회동하도록 설치된 회동판과, 회동판과 평행하도록 중앙판의 양측에 설치되는 지지판과, 중앙판과 지지판 사이에 설치되는 스프링을 포함하는 벨트컨베이어의 낙광 제거장치를 제공한다.Therefore, the present invention is a belt conveyor falling light removal device for removing the falling fall on the return belt during the conveyance of the belt conveyor, the fixed beam is installed across the return belt, the support shaft extending downwardly to the fixed beam, A center plate fixed to the support shaft in the direction of the return belt, a pivot plate installed to pivot with the support shaft centered thereon, support plates provided on both sides of the center plate parallel to the pivot plate, and installed between the center plate and the support plate It provides a belt conveyor falling light removal device comprising a spring.
Description
본 고안은 철강공장에서 원료 및 연료를 수송하는 벨트컨베이어에 관한 것으로, 더욱 상세하게는 벨트컨베이어의 상부에 이동 중인 원료 및 연료가 낙하하여 리턴벨트에 발생된 낙광을 제거하는 벨트컨베이어의 낙광 제거장치에 관한 것이다.The present invention relates to a belt conveyor for transporting raw materials and fuel in a steel mill, and more particularly, a falling belt removing device of a belt conveyor for removing falling lights generated in a return belt due to falling of moving raw materials and fuel on an upper portion of the belt conveyor. It is about.
일반적으로 연료 및 원료를 수송하는 벨트컨베이어는 작동중 스커트 불량과 수송물의 편적 및 벨트사행 등의 문제로 원료가 낙하하는 낙광이 발생되며, 이 낙광은 리턴벨트에 실려 이동하게 된다.In general, a belt conveyor that transports fuel and raw materials has a fall of falling raw materials due to problems such as a skirt failure during the operation, a pile of transport materials, and a belt meandering, which is carried on a return belt.
따라서 이러한 리턴벨트에 실려 있는 낙광을 제거시킬 낙광 제거장치가 필요하게 되는데, 이러한 낙광 제거장치는 벨트컨베이어에 다수개 설치된다.Therefore, there is a need for a fall light removal device for removing the fall light on the return belt, such a fall light removal device is installed in a plurality of belt conveyor.
여기서 낙광 제거장치는 도 1에 도시된 바와 같이 리턴벨트(109)의 상부에 리턴벨트(109)를 가로질러 설치되는 채널(102)과 이 채널(102)에 하방으로 지지샤프트(106)가 설치된다.Here, the fall light removing device has a channel 102 installed across the return belt 109 at an upper portion of the return belt 109 and a support shaft 106 installed downward in the channel 102 as shown in FIG. 1. do.
또한 지지샤프트(106)의 하부에는 삼각바디(105)가 고정 설치되며, 이 삼각바디(105)의 외부에 클리닝루버(103)가 볼트(104)에 의해 고정 설치된다.In addition, the lower portion of the support shaft 106, the triangular body 105 is fixedly installed, the cleaning louver 103 is fixed to the outside of the triangular body 105 by the bolt 104.
따라서 낙광된 광석은 삼각바디(105)의 클리닝루버(103)를 따라 리턴벨트(109)의 외측방향으로 이동하여 리턴벨트(109)의 외부로 제거된다.Therefore, the fallen ore moves along the cleaning louver 103 of the triangular body 105 in the outward direction of the return belt 109 and is removed to the outside of the return belt 109.
그러나 위와 같은 벨트컨베이어의 낙광 제거장치는 삼각바디가 소정의 각도로 고정 설치되므로 리턴벨트에 실려오는 낙광의 양이 증대되거나 리턴벨트의 진행 속도가 빨라지면 리턴벨트의 위의 낙광이 삼각바디를 오버플로우하게 된다.However, in the belt conveyor, the fall removal device of the belt conveyor is fixed to a predetermined angle, so when the amount of falling light on the return belt increases or the speed of the return belt increases, the falling light on the return belt over the triangle body. Will flow.
따라서 오버플로우된 낙광이 계속 진행하여 벨트컨베이어의 풀리 등의 설비와 충돌하여 고장을 발생시키므로 생산성이 저하되는 문제점이 있다.Therefore, the overflowed fall light continues to collide with the equipment such as the pulley of the belt conveyor to cause a failure, there is a problem that the productivity is lowered.
또한 낙광이 설비주변에 떨어지므로 분진 등으로 인한 환경오염을 일으키는 문제점이 있다.In addition, there is a problem causing environmental pollution due to dust, etc. because falling falls around the facility.
따라서 본 고안은 종래기술의 문제점을 해결하기 위하여 안출된 것으로, 그 목적은 리턴벨트를 통해 실려오는 낙광의 오버플로우를 방지하는 벨트컨베이어의 낙광 방지장치를 제공하는 데 있다.Therefore, the present invention has been made to solve the problems of the prior art, the object of the present invention is to provide a fall prevention device of the belt conveyor to prevent the overflow of falling light coming through the return belt.
도 1은 본 고안에 따른 벨트컨베이어의 낙광 방지장치의 사시도.1 is a perspective view of the fall prevention device of the belt conveyor according to the present invention.
도 2는 본 고안에 따른 지지축의 결합상태를 나타내는 단면도.Figure 2 is a cross-sectional view showing a coupling state of the support shaft according to the present invention.
도 3은 본 고안에 따른 가이드의 결합상태를 나타내는 단면도.3 is a cross-sectional view showing a coupling state of the guide according to the present invention.
도 4는 본 고안에 따른 벨트컨베이어의 낙광 방지장치의 작동상태를 나타내는 작동상태도.Figure 4 is an operating state showing the operating state of the fall prevention device of the belt conveyor according to the present invention.
도 5는 종래기술에 따른 낙광 방지장치의 작동상태를 개략적으로 나타내는 도면.5 is a view schematically showing an operating state of the fall prevention apparatus according to the prior art.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
2 : 고정빔 6 : 지지축2: fixed beam 6: support shaft
9 : 리턴벨트 23 : 가이드9: Return Belt 23: Guide
32 : 회동판 33 : 중앙판32: rotating plate 33: center plate
35 : 스프링35: spring
상기한 바와 같은 목적을 달성하기 위하여 본 고안은 벨트컨베이어의 이송 도중 리턴벨트에 떨어진 낙광을 제거하는 벨트컨베이어의 낙광 제거장치에 있어서, 리턴벨트를 가로질러 설치되는 고정빔과, 고정빔에 하방으로 연장 설치되는 지지축과, 지지축에 리턴벨트의 진행방향으로 고정 설치되는 중앙판, 지지축을 축중심으로하여 회동하도록 설치된 회동판과, 회동판과 평행하도록 중앙판의 양측에 설치되는 지지판과, 중앙판과 지지판 사이에 설치되는 스프링을 포함하는 벨트컨베이어의 낙광 제거장치를 제공한다.In order to achieve the above object, the present invention provides a belt conveyor falling light removal device for removing falling lights on the return belt during conveyance of the belt conveyor, the fixed beam is installed across the return belt, and fixed beam downwards A support shaft to be extended, a center plate fixed to the support shaft in the traveling direction of the return belt, a pivot plate provided to pivot with the support shaft centered thereon, and support plates provided on both sides of the center plate parallel to the pivot plate, Provided is a falling belt removing device of the belt conveyor including a spring installed between the central plate and the support plate.
또한 회동판으로부터 고정 설치되고 선단에 스톱파가 형성되어 지지판에 형성된 구멍을 관통하도록 설치된 가이드, 가이드에 설치되는 센서타깃, 지지판에 설치되어 센서타깃의 접근을 감지하는 감지센서, 감지센서로부터 전달된 신호에 따라 벨트컨베이어를 제어하는 제어패널로 이루어진 제어수단을 포하하는 것이 바람직하다.In addition, a guide is fixedly installed from the rotating plate and a stop wave is formed at the tip to penetrate the hole formed in the support plate, a sensor target installed on the guide, a sensor installed on the support plate to detect the approach of the sensor target, and a sensor transmitted from It is preferable to include a control means consisting of a control panel for controlling the belt conveyor in accordance with the signal.
이하 본 고안에 대한 바람직한 일실시예를 첨부된 도면을 참조하여 상세히설명한다.Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
도 1은 본 고안에 따른 벨트컨베이어의 낙광 방지장치의 사시도이고, 도 2는 본 고안에 따른 지지축의 결합상태를 나타내는 단면도이며, 도 3은 본 고안에 따른 가이드의 결합상태를 나타내는 단면도이다.1 is a perspective view of the fall prevention device of the belt conveyor according to the present invention, Figure 2 is a cross-sectional view showing a coupling state of the support shaft according to the present invention, Figure 3 is a cross-sectional view showing a coupling state of the guide according to the present invention.
본 고안에 따른 벨트컨베이어 낙광 방지장치는 리턴벨트(9)를 가로질러 설치되는 고정빔(2)과, 고정빔(2)에 하방으로 연장 설치되는 지지축(6)과, 지지축(6)에 리턴벨트(9)의 진행 반대방향으로 연장 설치되는 중앙판(33), 지지축(6)을 축중심으로하여 회동하도록 설치된 회동판(32)과, 회동판(32)과 평행하도록 중앙판(33)의 양측에 설치되는 지지판(34)과, 회동판(32)과 지지판(34) 사이에 설치되는 스프링(35)과 벨트컨베이어를 제어하는 제어수단으로 이루어진다.Belt conveyor falling light prevention device according to the present invention is a fixed beam (2) installed across the return belt (9), a support shaft (6) extending downward installed on the fixed beam (2), the support shaft (6) A center plate 33 extending in the opposite direction of the return belt 9 to the rotating belt 32, a pivoting plate 32 provided to pivot with the support shaft 6 as an axis, and a centering plate parallel to the pivoting plate 32 The support plate 34 provided on both sides of the 33, the spring 35 provided between the rotation plate 32 and the support plate 34, and the control means for controlling the belt conveyor.
먼저 고정빔(2)은 리턴벨트(9)의 상부에 리턴벨트(9)를 가로지르도록 고정 설치되고, 이 고정빔(2)에 지지축(6)이 고정 설치된다.First, the fixed beam 2 is fixedly installed to cross the return belt 9 on the top of the return belt 9, and the support shaft 6 is fixed to the fixed beam 2.
다음으로 지지축(6)은 고정빔(2)으로부터 하방으로 연장 설치되며 회동판(32)이 결합시 이탈되지 않도록 하단에 걸림턱이 형성된다.Next, the support shaft 6 is installed downward from the fixed beam 2, and the locking step is formed at the lower end so that the pivoting plate 32 is not separated when coupled.
또한 이 지지축(6)에 중앙판(33)은 고정 설치되고, 회동판(32)은 회동 가능하도록 설치된다.In addition, the center plate 33 is fixed to this support shaft 6, and the rotation plate 32 is provided so that rotation is possible.
다음으로 중앙판(33)은 지지축(6)으로부터 리턴벨트(9)의 진행 반대방향으로 연장되도록 고정 설치되며, 이 중앙판(33)에는 양측으로 회동판(32)과 평행한 지지판(34)이 고정 설치된다.Next, the center plate 33 is fixedly installed so as to extend from the support shaft 6 in the opposite direction of travel of the return belt 9, and the support plate 34 is parallel to the pivot plate 32 on both sides. ) Is fixedly installed.
다음으로 회동판(32)은 지지축(6)에 힌지 결합되어 지지축(6)을 축중심으로하여 회동한다.Next, the rotation plate 32 is hinged to the support shaft 6 to rotate with the support shaft 6 as the center of the shaft.
다음으로 지지판(34)은 중앙판(33)의 양측에 회동판(32)과 평행하도록 설치된다.Next, the support plate 34 is provided on both sides of the center plate 33 so as to be parallel to the pivoting plate 32.
다음으로 스프링(35)은 지지판(34)과 회동판(32) 사이에 설치되어 지지판(34)으로부터 회동판(32)을 탄성지지하게 된다.Next, the spring 35 is installed between the supporting plate 34 and the rotating plate 32 to elastically support the rotating plate 32 from the supporting plate 34.
또한 제어수단은 회동판(32)으로부터 고정 설치되고 선단에 스톱파가 형성되어 지지판(34)에 형성된 구멍을 관통하도록 설치된 가이드(23), 가이드(23)에 설치되는 센서타깃(22), 지지판(34)에 설치되어 센서타깃(22)의 접근을 감지하는 감지센서(21), 감지센서(21)로부터 전달된 신호에 따라 벨트컨베이어를 제어하는 제어패널(미도시)로 이루어진다.In addition, the control means is fixed to the rotating plate 32, the stop wave is formed at the tip end of the guide 23 installed to pass through the hole formed in the support plate 34, the sensor target 22 installed on the guide 23, the support plate Is installed on the 34 and the sensing sensor 21 for detecting the approach of the sensor target 22, it consists of a control panel (not shown) for controlling the belt conveyor in accordance with the signal transmitted from the sensor 21.
가이드(23)는 지지축(6)의 축중심을 중심으로 한 호 형상으로 지지판(34)에 형성된 구멍을 관통하도록 설치된다.The guide 23 is installed to penetrate the hole formed in the support plate 34 in an arc shape centering on the axis center of the support shaft 6.
이러한 가이드(23)의 선단에는 스톱파가 설치되어 회동판(32)의 회동반경을 제한한다.A stop wave is installed at the tip of the guide 23 to limit the turning radius of the rotating plate 32.
센서타깃(22)은 회동판(32)에 고정된 가이드(23)에 설치되어 회동판(32)과 일체로 이동하게 된다.The sensor target 22 is installed in the guide 23 fixed to the rotating plate 32 to move integrally with the rotating plate 32.
감지센서(21)는 지지판(34)에 설치되며 센서타깃(22)의 이동에 따라 회동판(32)의 회동을 감지한다.The sensor 21 is installed on the support plate 34 and detects the rotation of the rotating plate 32 according to the movement of the sensor target 22.
다음으로 제어패널은 감지센서(21)로부터 감지된 신호를 전달 받아 회동판(32)의 오버플로우를 판단하여 낙광이 회동판(32)을 오버플로우할 경우 벨트컨베이어를 정지시킨다.Next, the control panel receives the detected signal from the sensor 21 to determine the overflow of the rotating plate 32 to stop the belt conveyor when a fall light overflows the rotating plate 32.
이와 같은 본 고안에 따른 벨트컨베이어의 낙광 방지장치의 작동을 설명하면 다음과 같다.Referring to the operation of the fall prevention device of the belt conveyor according to the present invention as follows.
도 4는 본 고안에 따른 벨트컨베이어의 낙광 방지장치의 작동상태를 나타내는 작동상태도이다.Figure 4 is an operating state diagram showing the operating state of the fall prevention device of the belt conveyor according to the present invention.
먼저 벨트컨베이어를 이용하여 연료 및 원료를 수송하는 도중 발생된 낙광은 리턴벨트(9)위에 낙하하게 된다.First, a fall light generated while transporting fuel and raw materials using a belt conveyor falls on the return belt 9.
이와 같이 리턴벨트(9)에 떨어진 낙광은 리턴벨트(9)에 실려서 회동판(32)에 충돌하게 되고 회동판(32)에 충돌된 낙광은 회동판(32)을 따라 이동하여 리턴벨트(9)의 외부로 배출된다.As described above, the falling light falling on the return belt 9 is loaded on the return belt 9 to collide with the rotating plate 32, and the falling light hit by the rotating plate 32 moves along the rotating plate 32 to return the belt 9. Discharged outside).
또한 낙광이 점점 많아져 회동판(32)에 가해지는 부하가 증대되면 회동판(32)은 스프링(35)의 탄성력을 이기고 회동판(32)이 회동하게 된다.In addition, when the falling light increases, the load applied to the rotating plate 32 increases, the rotating plate 32 overcomes the elastic force of the spring 35 and the rotating plate 32 rotates.
회동판(32)이 지지축을 중심으로 회동하여 가이드(23)의 선단에 설치된 스톱파가 중앙판(33)에 충돌하게 되면 감지센서(21)가 센서타깃(22)을 감지하게 된다.When the rotating plate 32 rotates about the support shaft and the stop wave installed at the tip of the guide 23 collides with the center plate 33, the detection sensor 21 detects the sensor target 22.
따라서 감지센서(21)에서 감지된 신호가 제어패널에 전달되어 벨트컨베이어를 제어하고, 무점점센서(21)에서 센서타깃(22)의 접근이 소정시간 이상 지속되면 낙광의 오버플로우가 감지되어 벨트컨베이어를 정지시킨다.Therefore, the signal sensed by the sensor 21 is transmitted to the control panel to control the belt conveyor, and when the approach of the sensor target 22 in the pointless sensor 21 continues for a predetermined time or more, the overflow of the fall light is detected and the belt Stop the conveyor.
이상 설명한 바와 같은 본 고안에 따른 벨트컨베이어의 낙광 방지장치는 낙광이 오버플로우되면 벨트컨베이어이어가 정지되므로 벨트콘베이어의 고장 발생을방지하여 생산성을 향상시킨다.The fall prevention device of the belt conveyor according to the present invention as described above, because the belt conveyor is stopped when the fall falls overflows to prevent the failure of the belt conveyor to improve the productivity.
또한 낙광이 설비주변에 떨어지지 않게 되므로 분진 등으로 인한 환경오염을 방지할 수 있다.In addition, since the falling light does not fall around the facility, it is possible to prevent environmental pollution due to dust.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2020010039526U KR200267277Y1 (en) | 2001-12-20 | 2001-12-20 | Apparatus for cleaning of fallen ore of belt-conveyor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2020010039526U KR200267277Y1 (en) | 2001-12-20 | 2001-12-20 | Apparatus for cleaning of fallen ore of belt-conveyor |
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| Publication Number | Publication Date |
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| KR200267277Y1 true KR200267277Y1 (en) | 2002-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| KR2020010039526U KR200267277Y1 (en) | 2001-12-20 | 2001-12-20 | Apparatus for cleaning of fallen ore of belt-conveyor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101353836B1 (en) * | 2011-11-29 | 2014-01-20 | 주식회사 포스코 | Apparatus for preventing clogging of bin shute |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101353836B1 (en) * | 2011-11-29 | 2014-01-20 | 주식회사 포스코 | Apparatus for preventing clogging of bin shute |
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