KR950000429Y1 - Conveying materials in bulk through hopper - Google Patents

Conveying materials in bulk through hopper Download PDF

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Publication number
KR950000429Y1
KR950000429Y1 KR2019890020278U KR890020278U KR950000429Y1 KR 950000429 Y1 KR950000429 Y1 KR 950000429Y1 KR 2019890020278 U KR2019890020278 U KR 2019890020278U KR 890020278 U KR890020278 U KR 890020278U KR 950000429 Y1 KR950000429 Y1 KR 950000429Y1
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KR
South Korea
Prior art keywords
powder
hopper
pressure
motor
screw feeder
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KR2019890020278U
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Korean (ko)
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KR910010951U (en
Inventor
이성수
Original Assignee
포항종합제철 주식회사
김만제
재단법인 산업과학기술연구소
신창식
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Priority to KR2019890020278U priority Critical patent/KR950000429Y1/en
Publication of KR910010951U publication Critical patent/KR910010951U/en
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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
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/34—Details
    • B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
    • 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
    • B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
    • B65G53/04—Conveying materials in bulk pneumatically through pipes or tubes; Air slides
    • B65G53/06—Gas pressure systems operating without fluidisation of the materials
    • B65G53/08—Gas pressure systems operating without fluidisation of the materials with mechanical injection of the materials, e.g. by screw
    • 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
    • B65G2201/042—Granular material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air Transport Of Granular Materials (AREA)

Abstract

내용 없음.No content.

Description

분체의 정량공급장치Powder supply device

제1도의 (a)(b)도는 종래의 분해수송장치를 설명하기위한 호퍼의 개략도.(A) and (b) of FIG. 1 are schematic views of a hopper for explaining the conventional disassembly and transportation apparatus.

제2도는 본 고안의 장치를 전체적으로 도시한 개략구성도.2 is a schematic configuration diagram showing the apparatus of the present invention as a whole.

제3도는 모터 회전수(rpm)대(對) 분체수송관압력의 특성곡선도.3 is a characteristic curve diagram of a powder conveying tube pressure of a motor speed (rpm).

제4도는 본 고안의 모터회전수(rpm)대 분체공급량의 특성곡선도.4 is a characteristic curve of the motor speed (rpm) vs. powder supply amount of the present invention.

제5도는 본 고안의 분체공급량대 본체 수송관압력의 특성곡선도.5 is a characteristic curve of the powder supply amount of the main body transport pipe pressure of the present invention.

제6도는 본 고안의 모터회전수(rpm) 및 분체공급량대 분체수송관 압력의 특성곡선도.6 is a characteristic curve of the motor speed (rpm) and the powder supply amount versus the powder transport tube pressure of the present invention.

* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings

1 : 로드셀(load cell) 2 : 수입호퍼1: load cell 2: import hopper

3 : 불출호퍼 4 : 모터3: discharge hopper 4: motor

5 : 감속기 6 : 스크류피더(Screw Feeder)5: Reducer 6: Screw Feeder

7 : 이젝터(Ejector) 8 : 공기수송관7: Ejector 8: Air Transport Pipe

9 : 본체수송관 10 : 압력검출기9: main body transport tube 10: pressure detector

11 : 계산기 12 : 변환기11: Calculator 12: Converter

본 고안은 미분탄, 시멘트, 밀가루등의 분체를 정량으로 공급하는 장치에 관한 것이다.The present invention relates to a device for quantitatively supplying powders such as pulverized coal, cement and flour.

종래의 분체수송장치는 제1도의 (a)도와 같이 호퍼(21)에 내장된 분체(22)를 로터리밸브(23)를 통해 분체수송관(24)으로 이송한 후, 상기 분체수송관(24)의 일측에서 수송공기를 투입하여 사용개소(미도시)로 분체를 수송하게 된다.The conventional powder transport apparatus transfers the powder 22 embedded in the hopper 21 to the powder transport pipe 24 through the rotary valve 23 as shown in FIG. In one side of the) by transporting the air to transport the powder to the point of use (not shown).

제1도의 (b)도는 상기와는 다른 종래의 분체수송장치를 도시한 것으로서, 이는 호퍼(25)내의 분체(22)가 이젝터(26)로 낙하되어 분체수송관(24)이 일측으로부터 유입되는 수송공기에 의해서 사용개소(미도시)로 이동 된다.FIG. 1 (b) shows a conventional powder transport apparatus different from the above, in which the powder 22 in the hopper 25 falls to the ejector 26 so that the powder transport pipe 24 flows from one side. It is moved to the place of use (not shown) by the transport air.

그러나, 상기 종래의 장치에서는 호퍼(21, 25)의 원추부(cone)에서 본체(22)의 브릿지(brige) 또는 채널(channel)이 형성됨에 따라 원활한 분체수송이 이루어지지 않게되거나, 로터리밸브(23)의 폐쇄현상으로 인하여 분체의 수송작동이 불가능하게 된다.However, in the conventional apparatus, as a bridge or a channel of the main body 22 is formed at the cones of the hoppers 21 and 25, smooth powder transportation is not performed or a rotary valve ( Due to the closing phenomenon of 23, the transport of powder becomes impossible.

이를 방지하기 위해서는 호퍼(21, 25)에 공기충격장치(air knocker)나 진동기(vibrator)(미도시)등을 설치하게되는바, 이들에 의해 상기 호퍼가 진동하게 되면 호퍼에 부착된 입력계나 로드셀(Load cell)등의 계측기가 충격을 받게되어 계측기의 오동작 및 고장을 유발하게 된다.In order to prevent this, an air knocker or a vibrator (not shown) is installed in the hoppers 21 and 25. When the hopper vibrates by these, an input system or a load cell attached to the hopper Instrument such as (Load cell) is shocked and causes malfunction and failure of instrument.

본 고안은 이러한 문제점을 해결하기 위하여 안출한 것으로, 불출호퍼에 분체를 장입할때 모터로 구동되는 스크류피더를 통하여 이루어지게하고, 상기 스크류피더를 회전시키는 모터가 분체수송관의 압력에 따라 회전속도가 제어됨으로서, 별도의 진동장치등을 사용하지 않고서도 분체가 브릿지나 채널의 형성없이 안정되게 사용개소로 공급할 수 있는 분체의 정량공급장치를 제공함에 그 목적이 있다.The present invention has been made to solve this problem, and when the powder is loaded into the discharge hopper through a screw feeder driven by a motor, the motor for rotating the screw feeder rotates in accordance with the pressure of the powder transport pipe By controlling the, it is an object of the present invention to provide a quantitative supply device of powder that can be supplied to the place of use stably without the formation of bridges or channels without using a separate vibration device.

이하, 첨부도면을 참고로하여 본 고안의 실시예를 보다 상세히 설명하면 다음과 같다.Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail.

제2도에서, 본 고안은 수입호퍼(2)내의 분체가 스크류피더(6)를 통하여 불출호퍼(3)내로 투입되고, 분체수송관(9)의 압력이 압력검출기(10)에 의하여 검출되어 계산기(11)로 입력되며, 상기 계산기(11)에서는 압력검출기(10)의 검출신호와 압력설정치(P)를 비교계산하여 변환기(12)에 제어신호를 공급하며, 상기 변환기(12)의 출력이 모터(4)의 구동신호로 제공되고, 상기 모터(4)가 감속기(5)를 거쳐 상기 스크류피더(6)를 제어하도록 구성된다.In FIG. 2, in the present invention, the powder in the import hopper 2 is introduced into the discharge hopper 3 through the screw feeder 6, and the pressure of the powder transport pipe 9 is detected by the pressure detector 10. It is input to the calculator 11, the calculator 11 compares and calculates the detection signal of the pressure detector 10 and the pressure set value (P) to supply a control signal to the transducer 12, the output of the transducer 12 It is provided as a drive signal of the motor 4, and the motor 4 is configured to control the screw feeder 6 via the speed reducer 5.

도면중 미설명부호(1)은 수입호퍼(2)의 분체를 계량하는 로드셀(Load cell)이고, (7)은 이젝터(ejector)이며, (8)은 공기수송관이다.In the figure, reference numeral 1 denotes a load cell for measuring the powder of the import hopper 2, 7 denotes an ejector, and 8 denotes an air transport pipe.

상기와같이 구성된 본 고안의 작용 및 효과를 설명하면 다음과 같다.Referring to the operation and effects of the present invention configured as described above are as follows.

제2도에서, 상기 수입호퍼(2)로 일정량의 분체가 투입되면 수입호퍼(2)에 연결된 로드셀(1)에 의해 수입호퍼(2)내의 분체량이 검출된다.In FIG. 2, when a certain amount of powder is introduced into the import hopper 2, the amount of powder in the import hopper 2 is detected by the load cell 1 connected to the import hopper 2.

상기 수입호퍼(2)내의 분체는 모터(4)의 회전속도를 낮추는 감속기(5)에 연결된 스크류피더(6)에 의해 하부의 불출호퍼(3)내로 공급되며, 상기 불출호퍼(3)로부터 중력에 의해 그 하부에 위치한 이젝터(7)로 낙하되고, 상기 분체는 공기수송관(8)에서 공급되는 수송공기에 의해 상기 이젝터(7)로부터 분체수송관(9)으로 이동된다. 한편, 압력검출기(10)에서는 상기와 같이 분체가 수송될때 분체수송관(9)의 압력을 검출하여 계산기(11)로 전송하며, 계산기(11)에서는 제3도와 같이 미리입력된 분체수송량과 분체수송관(9) 압력에 대한 정보에 의해 압력검출기(10)에서 검출된 압력에서 분체의 공급량을 계산한다. 이때 압력검출기(10)에서 검출된 압력에 의해 계산된 분체공급량이 많은 경우, 즉 제4도의 화살표 A방향과 같이 압력설정치(P)에 해당하는 압력보다 검출된 압력(P2)이 높은 경우, 공급량설정치(Qc)와 계산치의 차이(△Qc2)만큼 모터(4)의 회전수가 적어지도록 제어되어. 따라서 수입 호퍼(2)에서 불출호퍼(3)로 공급되는 분체량이 감소되며, 제3도의 화살표 B방향과 같이 압력설정치(P)보다 검출된 압력(P1)이 낮은 경우에는 같은 방법으로 모터(4)의 회전수를 (△Qc1)만큼 증가시켜 수입호퍼(2)에서 불출호퍼(3)로 공급되는 분체량이 증가된다.The powder in the import hopper (2) is supplied into the lower discharge hopper (3) by a screw feeder (6) connected to the reducer (5) which lowers the rotational speed of the motor (4), and gravity from the discharge hopper (3) It is dropped by the ejector (7) located in the lower portion, the powder is moved from the ejector (7) to the powder transport pipe (9) by the transport air supplied from the air transport pipe (8). On the other hand, the pressure detector 10 detects the pressure of the powder transport pipe (9) and transfers it to the calculator (11) when the powder is transported as described above. The supply amount of the powder is calculated at the pressure detected by the pressure detector 10 based on the information on the pressure of the transport pipe 9. At this time, when the powder supply amount calculated by the pressure detected by the pressure detector 10 is large, that is, when the detected pressure (P 2 ) is higher than the pressure corresponding to the pressure set value (P) as shown by the arrow A in FIG. The rotation speed of the motor 4 is controlled to be smaller by the difference ΔQc 2 between the supply amount set value Qc and the calculated value. Therefore, the amount of powder supplied from the import hopper 2 to the discharge hopper 3 is reduced, and when the detected pressure P 1 is lower than the pressure set value P as shown by arrow B in FIG. 3, the motor ( The amount of powder supplied from the import hopper 2 to the discharge hopper 3 is increased by increasing the rotational speed of 4) by ΔQc 1 .

또한, 이때 불출호퍼(3)에서 이젝터(7)를 통해 분체수송관(9)으로 공급되는 분체의 양은 공기수송관(8)에서 공급되는 공기유량을 제어하는 것으로도 조절가능하며, 수입호퍼(2)에서 불출호퍼(3)로 공급되는 분체의 량은 불출호퍼(3)에서 이젝터(7)로 공급되는 분체량과 동일하게함으로써 분체가 불출호퍼(3)에 정체되지않게된다.In addition, the amount of powder supplied from the discharge hopper (3) to the powder transport pipe (9) through the ejector (7) is also adjustable by controlling the air flow rate supplied from the air transport pipe (8), import hopper ( In 2), the amount of powder supplied to the discharge hopper 3 is equal to the amount of powder supplied from the discharge hopper 3 to the ejector 7 so that the powder is not stagnated in the discharge hopper 3.

이하, 본 고안의 실시예를 설명한다.Hereinafter, embodiments of the present invention will be described.

본 고안의 실시를 위해 석탄을 파쇄하여 200mesh 이하의 입도가 70%인 분체를 제조하였다.For the practice of the present invention was pulverized coal to prepare a powder having a particle size of less than 200mesh 70%.

그리고, 제2도에 도시된 바와 같이 본 고안에 따른 미분탄정량공급장치의 수입호퍼(2)에 분체를 장입하고, 모터(4)의 회전에 의해서 연동되는 스크류피더(6)의 미분탄불출량을 제3도에 도시하였다.Then, as shown in FIG. 2, the powder is charged into the import hopper 2 of the pulverized coal quantity supply device according to the present invention, and the pulverized coal discharge amount of the screw feeder 6 linked by the rotation of the motor 4 is calculated. 3 is shown.

또한, 제5도에는 미분탄을 불출호퍼(3)로부터 이젝터(7)를 통해 분체수송관(9)에 미분탄을 공급하고 압력검출기(10)를 통해 미분탄 수송량에 따른 압력변화를 측정한 결과가 도시되어 있다. 이때, 공기 수송관(8)으로부터 공급되는 수송공기의 유량은 50Nℓ/min로 하였으며, 제5도에서 알수 있는 바와같이 압력검출기(10)에 의해 검출된 압력과 미분탄 수송량의 관계는 미분탄수송량이 증가될 수록 검출되는 분체수송관(9)의 압력이 증가되는 것이다.In addition, in FIG. 5, the fine coal is supplied to the powder transport pipe 9 from the discharge hopper 3 through the ejector 7 and the pressure change according to the fine coal transport amount is measured through the pressure detector 10. It is. At this time, the flow rate of the transport air supplied from the air transport pipe (8) was 50Nℓ / min, and as shown in FIG. 5, the relationship between the pressure detected by the pressure detector 10 and the pulverized coal transport amount is increased. The more the pressure of the powder transport pipe (9) detected increases.

따라서, 제3도와 제5도를 조합하면 제6도와 같이되며, 제6도의 기울기 a와 절편 b값을 계산기(11)에 입력하면 계산기(11)에서는 제3도와같이 분체수송관(9)의 압력을 측정하여 모터(4)의 회전수를 제어한다.Accordingly, when the third and the fifth degrees are combined, the sixth degree is obtained. When the slope a and the intercept b value of the sixth degree are input to the calculator 11, the calculator 11 of the powder transport pipe 9 The rotation speed of the motor 4 is controlled by measuring the pressure.

이와같이, 계산기(11)에 상수값 a와 b를 입력하고, 원하는 불출량을 계산기에 설정하면 이것이 모터(4)의 회전수를 결정하게되며, 모터(4)의 회전수에 따라서 스크류피더(6)에 의해 수입호퍼(2)내의 미분탄이 불출호퍼(3)로 공급되고, 상기와 같이 공급된 미분탄은 불출호퍼(3)에 정체되지 않으면서 대부분 이젝터(7)를 통해 분체수송관(9)으로 공급된다.In this way, by inputting constant values a and b into the calculator 11 and setting the desired dispensing amount to the calculator, this determines the rotational speed of the motor 4 and the screw feeder 6 according to the rotational speed of the motor 4. Pulverized coal in the import hopper (2) is supplied to the discharge hopper (3), and the pulverized coal supplied as described above is mostly conveyed through the ejector (7) without stagnant in the discharge hopper (3) Is supplied.

이때, 분체수송관(9)에 설치된 압력검출기는 상기 분체수송관(9)의 압력을 검출하여 계산기(11)로 전송하며 계산기에서는 압력설정치(P)와 검출된 압력을 비교하여 상기 압력 설정치(P)보다 압력이 높거나 낮으면, 모터(4)의 회전수를 적절히 상기와같이 제어함으로써 균일한 양의 미분탄을 안전하게 공급할 수 있다.At this time, the pressure detector installed in the powder transport pipe (9) detects the pressure of the powder transport pipe (9) and transmits it to the calculator (11). The calculator compares the pressure set point (P) and the detected pressure to the pressure set value ( When the pressure is higher or lower than P), by uniformly controlling the rotation speed of the motor 4 as described above, it is possible to safely supply a uniform amount of pulverized coal.

하기 표1은 본 고안의 장치와 기존의 장치에서의 공급량 제어정도에 대한 실험치를 나타낸다.Table 1 below shows the experimental values for the degree of supply control in the device of the present invention and the existing device.

[표 1]TABLE 1

상기에서 알수 있는 바와 같이, 본 고안에 의한 장치에 의해 미분탄을 공급할 경우, 종래장치에서의 공급편차 38-40%보다 현저히 개선된 2.5-5%의 공급편차를 유지하게 되고 상대적으로 매우 정밀한 분체 공급량 제어가 가능하게 된다.As can be seen from the above, when pulverized coal is supplied by the device according to the present invention, the supply deviation of 2.5-5% is maintained, which is significantly improved from the supply deviation of 38-40% in the conventional device, and the powder supply amount is very precise. Control is possible.

이상에서 설명한 바와같이 본 고안은, 본체수송관의 압력을 검출하고 이를 압력 설정치(P)와 비교하여 그 차이에 비례하는 값으로 불출호퍼에 분체를 공급하는 스크류피더(6)구동용 모터(4)를 제어함으로써 불출호퍼(3)에 분체가 적체되어 브리지현상이나 채널현상이 발생되는 것을 방지할 수 있고, 또한 분체수송의 정밀한 제어가 가능하게 되며, 공기충격장치 또는 진동기의 설치에 따른 설비원가상승 및 분체수송기기등의 고장을 방지할 수 있는 실용상의 매우 우수한 효과가 나타나게 된다.As described above, the present invention detects the pressure of the main body transport pipe, compares it with the pressure setpoint P, and supplies the powder to the discharge hopper at a value proportional to the difference. By controlling), it is possible to prevent the bridge phenomena and channel phenomena from being accumulated by the discharging hopper (3), and also to precisely control the powder transport, and the equipment cost according to the installation of the air shock device or vibrator. The practically excellent effect that can prevent the rise and failure of the powder transport equipment is shown.

Claims (1)

로드셀(1)이 갖춰진 수입호퍼(2); 상기 수입호퍼(2)로 부터 본체를 불출호퍼(3)에 공급하는 스크류피더(6); 상기 스크류피더(6)를 구동하는 모터(4); 상기 불출호퍼(3)로부터 분체를 사용개소에 공급하는 공기 및 분체수송관(8)(9); 상기 분체수송관(9)의 압력을 검출하는 압력검출기(10); 및 상기 압력검출기(10)의 검출신호를 받아서 압력설정치(P)와 비교하여 그 차이만큼의 전기적 신호를 출력하는 계산기(11);를 갖춘 분체 수송장치에 있어서, 상기 계산기(11)의 전기적 출력신호에 따라서 상기 스크류피더(6)의 모터(4) 회전속도를 제어하는 변환기(12); 를 갖추어 분체 공급량을 조절함을 특징으로 하는 분체의 정량 공급장치.An import hopper 2 equipped with a load cell 1; A screw feeder (6) for feeding the main body from the import hopper (2) to the discharge hopper (3); A motor 4 for driving the screw feeder 6; Air and powder transport pipes (8) (9) for supplying powder from the discharge hopper (3) to the place of use; A pressure detector (10) for detecting the pressure in the powder transport pipe (9); And a calculator (11) which receives the detection signal of the pressure detector (10) and compares the pressure set value (P) and outputs an electrical signal corresponding to the difference. The powder transport apparatus comprising: an electrical output of the calculator (11). A transducer (12) for controlling the rotational speed of the motor (4) of the screw feeder (6) according to a signal; Equipped with a fixed quantity powder supply device characterized in that to adjust the powder supply amount.
KR2019890020278U 1989-12-28 1989-12-28 Conveying materials in bulk through hopper KR950000429Y1 (en)

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KR20160072348A (en) * 2014-12-12 2016-06-23 주식회사 포스코 Apparatus for feeding powder

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KR100895082B1 (en) * 2002-09-10 2009-04-28 주식회사 포스코 Apparatus For Discharging Quantitatively Cokes Through Loading Chute

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160072348A (en) * 2014-12-12 2016-06-23 주식회사 포스코 Apparatus for feeding powder

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