KR930002377B1 - Jdevice and method for dust removal in tunnel - Google Patents
Jdevice and method for dust removal in tunnel Download PDFInfo
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- KR930002377B1 KR930002377B1 KR1019910007127A KR910007127A KR930002377B1 KR 930002377 B1 KR930002377 B1 KR 930002377B1 KR 1019910007127 A KR1019910007127 A KR 1019910007127A KR 910007127 A KR910007127 A KR 910007127A KR 930002377 B1 KR930002377 B1 KR 930002377B1
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- water
- dust
- pipe
- collected
- coal
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- 239000000428 dust Substances 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 77
- 238000000926 separation method Methods 0.000 claims abstract description 3
- 238000011084 recovery Methods 0.000 claims description 20
- 239000003245 coal Substances 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 8
- 239000007921 spray Substances 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims 3
- 239000002817 coal dust Substances 0.000 claims 2
- 208000028659 discharge Diseases 0.000 claims 1
- 239000008400 supply water Substances 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 4
- 150000001768 cations Chemical class 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 208000028571 Occupational disease Diseases 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052901 montmorillonite Inorganic materials 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 1
- 239000002734 clay mineral Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002498 deadly effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- -1 halosite Chemical compound 0.000 description 1
- 229910052622 kaolinite Inorganic materials 0.000 description 1
- CYPPCCJJKNISFK-UHFFFAOYSA-J kaolinite Chemical compound [OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[O-][Si](=O)O[Si]([O-])=O CYPPCCJJKNISFK-UHFFFAOYSA-J 0.000 description 1
- 206010035653 pneumoconiosis Diseases 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 201000000980 schizophrenia Diseases 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Separation Of Particles Using Liquids (AREA)
- Cyclones (AREA)
Abstract
Description
제1도는 본 발명의 실시예를 도시한 일부절결 분해 사시도,1 is a partially cutaway exploded perspective view showing an embodiment of the present invention,
제2도는 제1도에 대한 조립단면도로서 분진제거 및 회수처리 과정을 설명키위한 개략적인 원리도,FIG. 2 is a schematic cross-sectional view of FIG. 1 for explaining the principle of dust removal and recovery process.
제3도는 본 발명의 주요부분에 대한 평단면도.3 is a plan sectional view of an essential part of the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
100 : 집진통체 100a : 살수장치부100: dust collector 100a: watering device
100b : 포집부 100c : 분리회수부100b: collecting part 100c: separating recovery part
101 : 물순환탱크 101a : 격판101: water circulation tank 101a: diaphragm
1 : 물분사관 1a : 노즐1: Water spray pipe 1a: Nozzle
2 : 충돌부재 2a : 체결부재2: Collision member 2a: Fastening member
3 : 유도관 4 : 회수공간3: guide pipe 4: recovery space
5 : 경사판 6 : 회수관5: inclined plate 6: recovery pipe
7 : 공급관 8 : 배출관7: supply pipe 8: discharge pipe
9 : 출수관 10 : 펌프9: water outlet pipe 10: pump
11 : 균압관11: equalization tube
본 발명은 탄광의 갱내에서 채탄과 운반등의 작업시 발생되는 분진에 대해 제거 회수처리하는 방법 및 그에따른 제어효율이 증대된 장치에 관한 것으로서, 특히, 갱내에서 발생되는 분진이 지니는 광물학적 특성을 적절히 이용하여 극미립 상태의 분진을 제거하는 방법으로 최소의 점유공간에 설치할 수 있도록 소형화를 실현하여 비교적 협소한 갱내의 개선된 작업환경을 제공하고자 하는 목적을 지닌 발명인 것이다.The present invention relates to a method for removing and recovering dust generated during coal mining and transporting in a mine of a coal mine, and an apparatus with increased control efficiency. Particularly, the present invention relates to the mineralogical characteristics of dust generated in a mine. It is an invention having the purpose of providing an improved working environment in a relatively narrow pit by realizing miniaturization so that it can be installed in a minimum occupied space by a method of removing dust in an extremely fine state by appropriate use.
일반적으로 채탄작업을 수행하는 탄광의 갱내는 장소가 협소하고, 폭발성 가스가 누출되는 곳도 있을 뿐아니라 채탄의 작업형태, 또는, 계속하여 탄을 이동하는 작업형태에 의해 난해한 작업환경이 조성됨에 따라 광부들의 대부분은 진페증이라는 직업병을 앓고 있는게 현실이며, 이와 같은 갱내의 작업환경을 개선하기위해 일반형태의 집진시설 설치에는 갱내의 협소한 공간에 의해 설치가 불가능하였고, 갱내에서 전용할 수있는 접진시설로서는 팬(Fan) 또는 압기를 이용한 형태의 것들이 소개되고 있으나 이들 집진시설은 국부적인 분진 농도를 줄일 수 있으나, 일단 부유된 상태의 분진을 다른 곳으로 이동시키는 결과밖에 기대할 수없어 전체적인 작업환경개선에는 크게 기여하지 못하고 있는 실정이다.In general, the mining pit of the coal mining site is not only narrow in place, there are some places where the explosive gas leaks, but also the difficult working environment is created by the working type of the coal mining or the continuous moving of the coal. Most of the miners suffer from the occupational disease of schizophrenia, and in order to improve the working environment in the mine, it is impossible to install the general type of dust collector by the narrow space of the mine, and the ground can be dedicated to the mine. Although facilities using fan or press are being introduced as these facilities, these dust collection facilities can reduce local dust concentration, but can only expect the result of moving the suspended dust to other places. There is no significant contribution to the situation.
따라서 본 발명에서는 탄광내에서 작업자가 호흡시 흡입성 분진이 10㎛이하임을 확인함과, 아울러, 광물학적 조성을 보면, 극미립 석탄과 탄중에 함유된 카오리나이트, 하로사이트, 몬모릴로나이트, 이라이트등 점토 광물등이 다량 함유되어 있음과, 이들 점토광물들은 물에 대한 친수성이 강함은 물론 물에 현탁된 상태에서는 전기적으로 음으로 하전됨을 확인할 수 있어, 본 발명에서는 이와 같은 분진이 지니는 광물학적 특성을 적절히 이용하여 부유분진에 대해 고압으로 살수되는 물에 양이온을 띠는 소정의 침강촉진제를 첨가한 미립상태의 물방울 표면에 분진이 포집되게 하여 이를 물방울과 분리하여 회수 처리할 수 있도록된 처리방법을 제공하게 된 것으로서 그 실시예를 도시한 첨부도면에 따라 그 구성 및 작용효과를 상세히 설명하면 다음과 같다.Therefore, in the present invention, when the worker breathing in the coal mine confirms that the inhalable dust is less than 10㎛, and also in the mineral composition, the fine grain coal and coal contained in the kaolinite, halosite, montmorillonite, clay, etc. It can be confirmed that a large amount of minerals and the like, these clay minerals are not only hydrophilic to water, but also electrically negatively charged when suspended in water, in the present invention, the mineral properties of such dust is appropriately To provide a treatment method by which dust is collected on the surface of fine water droplets in which fine sedimentation promoters having a cation in water sprayed at high pressure with respect to suspended dust are collected and separated from the water droplets. According to the accompanying drawings showing the embodiments as shown in the following detailed description of the configuration and effect Below.
집진통체(100)의 인입구(A)측 전방에 다수의 노즐(1a)을 가진 물분사관(1)을 내장시켜 살수장치부(100a)를 구비하고, 상기 살수장치부(100a)와 포집부(100b)을 사이에 두고 토출구(B)측에 체결부재(2a)로 하여금 일정한 간극(S)을 두고 굴곡형상의 충돌 부재(2) 다수를 배열하면서 그 직하방의 집진통체(100)에 유도관(3)을 가진 회수공간(4)을 형성시켜서된 분리회수부(100c)을 구비하는 한편, 상기 회수공간(4)에 연통되게 형성된 유도관(3)을 연장하여 바닥면에 소정의 기울기(θ)를 갖는 경사판(5)이 형성됨과, 내부에 격판(101a)으로 이루어진 물순환탱크(101)의 회수관(6)에 연결하고, 상기 물순환탱크(101)에는 물공급관(7), 분진배출관(8), 출수관(9)을 구비하여 상기 출수관(9)라인에는 펌프(10)를 장착하여 집진통체(100)의 살수장치부(100a)에 해당하는 물분사관(1)에 물공급토록하는 한편, 균압관(11)을 연장하여 물공급관(7)과 연결하여 이루어진 구성으로서, 미설명부호 A는 인입구이고, B는 토출구이며, S는 간극인 것이다.A water spray pipe (1) having a plurality of nozzles (1a) is built in front of the inlet (A) side of the dust collecting body (100) and provided with a watering device (100a), the watering device 100a and the collecting part ( The induction pipe (2) is arranged at the discharge port (B) with a fastening member (2a) arranged at a discharge gap (B) with a predetermined gap (S), and a plurality of bent collision members (2) are arranged. 3) having a separate recovery part 100c formed by forming a recovery space 4 having a recovery space 4, while extending the induction pipe 3 formed in communication with the recovery space 4, and having a predetermined slope? Is formed with an inclined plate (5) and connected to the recovery pipe (6) of the water circulation tank (101) consisting of diaphragms (101a) therein, and the water circulation tank (101) has a water supply pipe (7) and dust A discharge pipe 8 and a water discharge pipe 9 are provided, and the water discharge pipe 9 is equipped with a pump 10 to supply water to the water spray pipe 1 corresponding to the sprinkling unit 100a of the dust collecting body 100. Supply soil On the other hand, it is configured to extend the pressure equalizing pipe (11) to connect with the water supply pipe (7), where A is an inlet, B is a discharge port, and S is a gap.
이와 같은 실시예에 따른 본 발명의 작용효과를 상세히 설명하면 다음과 같다.Referring to the effect of the present invention according to the embodiment in detail as follows.
도면 제1도는 본 발명에서 동원되는 각 부분품에 대한 구조를 도시한 것이고, 도면 제2도는 본 발명에 의한 집진싸이클을 도시한 원리도로서 물순환탱크(101)에 외부로부터 물공급관(7)을 통해 공급되어진 물을 출수관(9)에 장치된 펌프(10)를 가동시키게 되면 물순환탱크(101)에 있는 물은 출수관(9)을 통해 집진통체(100)의 인입구(A)측에 내장된 물분사관(1)에 높은 압력으로 유도되어 다수의 노즐(1a)을 통해 집진통체(100)내부후방에 해당하는 포집부(100b)에 분사된다.Figure 1 shows the structure for each part mobilized in the present invention, Figure 2 is a principle diagram showing the dust collection cycle according to the present invention to the water circulation tank 101 from the outside of the water supply pipe (7) When the pump 10 installed in the water outlet pipe 9 is supplied with the water supplied through the water circulation tank 101, the water in the inlet port A of the dust collecting body 100 is discharged through the water outlet pipe 9. Induced by a high pressure in the built-in water spray pipe (1) is injected to the collecting portion (100b) corresponding to the inner back of the dust collecting body (100) through a plurality of nozzles (1a).
이때, 집진통체(100)내부와 외부사이에는 물분사 압력에 의해 기압차가 발생하게 되므로서 집진통체(100)외부에 위치하는 분진을 포함하고 있는 갱내의 공기는 집진통체(100)내부로 유입되는 상태가 유지된다.At this time, since the air pressure difference is generated between the inside and the outside of the dust collecting body 100 by the water injection pressure, the air in the gang containing the dust located outside the dust collecting body 100 is introduced into the dust collecting body 100. The state is maintained.
이와 같이 기압차에 의해 분진을 포함한 공기는 노즐(1a)에 의해 분사되는 미립의 물방울 표면과의 접촉에 의해 흡착 포집되는 상태가 되며, 이와 같은 흡착포집의 영역은 살수장치부(100a)에서 분리회수부(100c)까지의 영역에 해당하는 포집부(100b)에서 유입되는 공기중에 존재하는 분진이 완전 포집된 상태로 집진통체(100)의 후방토출구(B)방향으로 강제 이동되는 기류가 형성되면서 이동되는 상태가 된다.As such, the air containing dust is absorbed and collected by contact with the surface of the fine water droplets injected by the nozzle 1a, and the area of the adsorption collection is separated from the sprinkler 100a. As the air flow is forcibly moved toward the rear discharge port B of the dust collecting body 100 in a state in which dust existing in the air flowing from the collecting part 100b corresponding to the region up to the collecting part 100c is collected. It will be moved.
이 분진이 포집된 미립상태의 물방울은 분리회수부(100c)를 구성하고 있는 체결부재(2a)에 의해 일정간극(S)을 두고 도면 제3도에 도시된 바와 같이 다수배열된 굴곡진 충돌부재(2)사이의 간극(S)을 통과하게되며, 이때 통과하는 과정에서 충돌부재(2)와 미립상태이면서 분진을 흡착 포집상태의 물방울은 부딪히게되고, 물방울이 충돌부재(2)와 부딪힘과 동시에 파괴되어 자중에 의해 간극(S)사이 하방으로 낙하하여, 그직하방에 배치 형성된 회수 공간(4)에 물방울과 분진이 회수된다.The particulate water droplets in which the dust is collected are curved collision members arranged in a large number as shown in FIG. 3 with a predetermined gap S by the fastening member 2a constituting the separation recovery portion 100c. (2) passes through the gap (S), in the process of passing through the collision of the collision member (2) and the particulate state of the adsorption trapping state of dust trapped, and the water droplets collide with the collision member (2) and At the same time, it is destroyed and falls downward between the gaps S by its own weight, whereby water droplets and dust are collected in the recovery space 4 formed below.
여기서 굴곡진 충돌부재(2)는 1차 굴곡, 2차 굴곡…n차 굴곡에 의해 파괴되지 않고 통과되는 물방울이 없도록 하는 한편, 토출구(B)를 통과 토출되는 공기압 정도에 따라, 간극정도와 n차 굴곡의 충돌부재(2)가 결정되어지는 것이다.Wherein the curved collision member (2) is the first bend, the second bend… While there is no drop of water passing through the n-th bend, the collision member 2 of the gap degree and the n-th bend is determined according to the degree of air pressure discharged through the discharge port B. FIG.
한편, 상기와 같이 기류속에 포함되어 있는 분진과 물방울은 충돌 부재(2)하방 회수공간(4)에 낙하 회수됨에 따라 정화된 공기는 토출구(B)를 통해 갱내로 토출된다.On the other hand, the dust and water droplets contained in the air flow as described above is dropped and recovered in the recovery space (4) below the collision member 2, the purified air is discharged into the gang through the discharge port (B).
그리고, 회수공간(4)에 회수된 물과 분진으로 이루어진 슬러리는 유도관(3)과 회수관(6)을 통해 별도설치된 물 순환탱크(101)내부로 유도된다.Then, the slurry composed of water and dust recovered in the recovery space (4) is guided into the water circulation tank 101 installed separately through the induction pipe (3) and the recovery pipe (6).
여기서, 물순환랭크(101)에 장입공급된 물에는 갱내에서 발생되는 분진중 몬모릴로나이트, 이라이트 등 물에 잘 풀어지는 점토분이 함유될때는 침강촉진제인 포리머(Polymer)에 다가 양이온을 적정량 첨가하게되고, 또한, 갱내에 발생하는 분진의 광물학적 성분에 따라 적절한 침강촉진제를 선택하여 적정량을 물 순환탱크(101)에 첨가 사용하게 되므로서 음이온으로 하전된 미립상태의 분진이 양이온의 영향으로 물방울에효과적으로 포집되어 집진 효율을 증대시킨다.Here, when the water supplied to the water circulation rank 101 contains clay powders such as montmorillonite and irite which are easily released in water, the appropriate amount of the polyvalent cation is added to the polymerizer, which is a sedimentation accelerator, in the dust generated in the pit. In addition, an appropriate amount of sedimentation accelerator is selected and used in the water circulation tank 101 according to the mineralogical components of dust generated in the pit, so that particulate matter charged with anions is effectively collected in water droplets under the influence of cations. To increase the dust collection efficiency.
이와 같이 침강촉진제가 첨가된 상태의 물과 분진이 물 순환탱크(101)에 유도되면, 침강되어 도면 제2도에 도시된 바와 같이 경사판(5)의 기울기(θ)에 의해 낮은 위치로부터 침전되며, 이 침전된 슬러리는 배출관(8)을 통해 외부로 배출 처리하게 된다. 한편, 유도관(3)과 회수관(6)을 통해 물순환탱크(101)에 유도된 물은 다시 출수관(9)배관라인에 장착된 펌프(10)의 가동으로 집진통체(100)의 물분사관(1)에 다시 공급 분사토록하는 순환이 계속 진행된다.As such, when water and dust in which the sedimentation accelerator is added are introduced into the water circulation tank 101, the sedimentation accelerator is precipitated and precipitated from a low position by the inclination θ of the inclined plate 5 as shown in FIG. This precipitated slurry is discharged to the outside through the discharge pipe (8). On the other hand, the water guided to the water circulation tank 101 through the induction pipe (3) and the recovery pipe (6) of the dust collecting body 100 by the operation of the pump (10) mounted in the outlet pipe (9) pipe line again The circulation for supplying and supplying water to the water injection pipe 1 is continued.
이때, 펌프(10)에 의한 펌핑수압이 정도이상으로 작용될때는 균압관(11)을 통해 공급관(7)으로 다시 물순환탱크(101)내부로 복귀되도록 하는 한편, 공급관(7)을 통해 외부의 물을 물 순환 탱크(101)에 물을 충진공급하게 된다.At this time, when the pumping water pressure by the pump 10 is operated above the degree to return to the inside of the water circulation tank 101 back to the supply pipe (7) through the pressure equalizing pipe (11), while the outside through the supply pipe (7) The water is supplied to the water circulation tank 101 is filled with water.
상술한 바와 같이 본 발명은 침강촉진제가 첨가된 물을 펌프(10)로 적정한 수압(10-15kg/㎠정도)으로 살수장치부(100a)를 통해 집진통체(100)의 내부인 포집부(100b)로 분사 살수하여 기압차의 자연발생으로 인입구(A)를 통해 외부의 갱내 분진을 포함한 공기가 인입되면서 미립상태의 물방울 표면에 포집되면서 분진과 물은 하방의 회수공간(4)으로 낙하되고, 정화된 공기는 토출구(B)를 통해 토출되는 한편 회수공간(4)에 수집된 슬러리(물+분진)는 물순환탱크(101)에 유도 침전되어 배출관(8)을 통해 배출처리하게 되고, 물은 다시 격판(101a)으로 분리된 또 다른 영역에 연결되어진 출수관(9)의 펌프(10)가동으로 상기 살수장치부(100a)에 재공급하는 순환관계를 지니면서 집진기능을 수행하게 되는 것으로서 실제 탄광의 갱내 현장에 적용시험을 실시한 바, 다음과 같은 제진효율을 나타냄을 확인할 수 있었다.As described above, the present invention collects water 100b that is the inside of the dust collecting body 100 through the sprinkler 100a at a suitable water pressure (about 10-15kg / cm 2) with the pump 10 to which the sedimentation accelerator is added. As the sprinkling sprayed by), the air including the internal gang dust is introduced through the inlet (A) due to the spontaneous generation of dust and collected on the surface of the fine water droplets. The purified air is discharged through the discharge port B, while the slurry (water + dust) collected in the recovery space 4 is induced and precipitated in the water circulation tank 101 to be discharged through the discharge pipe 8, and the water is discharged. As the pump 10 of the water outlet pipe 9 connected to another area separated by the diaphragm 101a again has a circulation relationship to resupply the watering device unit 100a to perform a dust collection function. Application tests were conducted at the mine site of the actual coal mine. The damping efficiency was found to represent.
ㆍ집진장치 가동전 분진농도 19.86mg/㎥ㆍ Dust concentration before operation of dust collector 19.86mg / ㎥
ㆍ집진장치 가동후 분진농도 4.57mg/㎥ㆍ dust concentration after operation of dust collector 4.57mg / ㎥
ㆍ제진효율 77%ㆍ 77% dust removal efficiency
즉, 본 발명에 의한 갱내 분진 제거방법 및 장치는 갱내에 부유된 상태의 극미립상태의 분진에 해당하는 10㎛이하의 작업자 호흡시 흡입성 분진을 광물학적 조성에 따른 특성을 이용하여 제진 효율을 증대시키게된 새로운 방법을 제공하므로서 갱내 작업환경 개선은 물론, 특히, 광부들의 치명적인 직업병중의 하나인 진폐증환자를 줄일 수 있도록 한 것이다.In other words, the method and apparatus for removing the dust in the mine according to the present invention utilize the characteristics according to the mineralogical composition of the inhalable dust when the worker breaths less than 10 μm corresponding to the particulate matter in the state suspended in the mine. By providing a new way to increase the work environment in the mines, as well as to reduce pneumoconiosis, which is one of the deadly occupational diseases of miners.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910007127A KR930002377B1 (en) | 1991-05-02 | 1991-05-02 | Jdevice and method for dust removal in tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019910007127A KR930002377B1 (en) | 1991-05-02 | 1991-05-02 | Jdevice and method for dust removal in tunnel |
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| Publication Number | Publication Date |
|---|---|
| KR920021835A KR920021835A (en) | 1992-12-18 |
| KR930002377B1 true KR930002377B1 (en) | 1993-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019910007127A KR930002377B1 (en) | 1991-05-02 | 1991-05-02 | Jdevice and method for dust removal in tunnel |
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| KR (1) | KR930002377B1 (en) |
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| KR100316390B1 (en) * | 1999-04-28 | 2001-12-12 | 조주순 | Cargo-working werehouse for fly a way of shield |
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