KR20040087788A - a tunnel wall cleaning apparatus - Google Patents

a tunnel wall cleaning apparatus Download PDF

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Publication number
KR20040087788A
KR20040087788A KR1020030022196A KR20030022196A KR20040087788A KR 20040087788 A KR20040087788 A KR 20040087788A KR 1020030022196 A KR1020030022196 A KR 1020030022196A KR 20030022196 A KR20030022196 A KR 20030022196A KR 20040087788 A KR20040087788 A KR 20040087788A
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KR
South Korea
Prior art keywords
water
storage unit
tunnel wall
cleaning
washing water
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KR1020030022196A
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Korean (ko)
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KR100516024B1 (en
Inventor
박권제
정훈
조용서
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(주) 창성종합건설
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Priority to KR10-2003-0022196A priority Critical patent/KR100516024B1/en
Publication of KR20040087788A publication Critical patent/KR20040087788A/en
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Publication of KR100516024B1 publication Critical patent/KR100516024B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K21/00—Fluid-delivery valves, e.g. self-closing valves
    • F16K21/04—Self-closing valves, i.e. closing automatically after operation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
    • F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0058—Optical means, e.g. light transmission, observation ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
    • F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor

Abstract

PURPOSE: A tunnel wall surface cleaning device is provided to prevent the water and soil pollution and to minimize the waste of water by recycling after purifying the polluted water. CONSTITUTION: In the tunnel wall surface cleaning device, a water tank(30) is partitioned into a water storage unit(31), a waste water disposal unit(32) and a sewerage storage unit(33) to let the sewerage of the sewerage storage unit(33) supply to the water storage unit(31) through the waste water disposal unit(32), a closed rubber cover is installed around an opening of a cleaning kit(20), a connector installed on the lower part of the cleaning kit(20) is connected with the sewerage storage unit(33) to let the water polluted by injecting to a tunnel wall surface while cleaning gathered in the sewerage storage unit(33).

Description

터널 벽면 청소장치 { a tunnel wall cleaning apparatus }Tunnel wall cleaning apparatus

본 발명은 차량에 부착되어 차량의 이동중에 터널의 벽면이 자연스럽게 청소될 수 있도록 하는 터널 벽면 청소장치에 관한 것으로, 더 자세하게는 터널 벽면에 분사되는 세척수를 다시 회수하여 정화한 후 재사용할 수 있도록 한 것에 관한 것이다.The present invention relates to a tunnel wall cleaning apparatus attached to a vehicle to allow the tunnel wall to be naturally cleaned during the movement of the vehicle. More particularly, the present invention relates to a tunnel wall cleaning device, in which the washing water sprayed on the tunnel wall can be recovered, purified and reused. It's about things.

일반적으로 국도나 고속도로, 시내도로 등에 있는 터널의 벽면은 터널을 통과하는 각종 차량으로부터 배출되는 배기가스에 의해 오염되기 마련이며, 터널의 벽면을 오염된 상태로 방치하게 되면 미관상으로도 좋지 않을 뿐 아니라 터널내의 조도가 떨어지게 되어 차량의 통행이 불편하게 되고 각종 안전사고가 발생할 우려가 많아지게 된다.In general, tunnel walls on national roads, highways, and city roads are contaminated by exhaust gases emitted from various vehicles passing through the tunnel, and if the walls of tunnels are left in a contaminated state, they are not good. As illumination in the tunnel is reduced, traffic of the vehicle becomes inconvenient and various safety accidents are likely to occur.

따라서 터널의 벽면은 주기적으로 깨끗하게 청소를 하는 것이 극히 바람직하게 되지만 터널 벽면에 물을 뿌린 다음 많은 수의 작업인부가 세척솔이 달린 긴 막대를 이용하여 터널 벽면을 닦아내고 다시 물을 뿌려 닦아내는 경우에는 인력과 시간이 많이 소요되어 경비가 많이 들게 될 뿐 아니라 터널 벽면 쪽의 차선에 대한 차량의 통행을 장시간동안 통제하여야 불편이 있게 된다.Therefore, it is extremely desirable to periodically clean the tunnel walls, but if water is sprayed on the tunnel walls, then a large number of workers will use a long rod with a cleaning brush to wipe the tunnel walls and spray them again. Not only will it cost a lot of time and money, but it will be inconvenient to control the traffic for a long time on the lane on the tunnel wall.

이에 물탱크를 장착한 차량에 회전브러시와 다수의 세척수분사노즐을 구비하는 함형 청소키트를 상하방향으로 회동이 자유롭게 설치한 형태의 터널 벽면 청소장치가 제안되었으며, 이러한 차량 부착형 청소장치를 사용하는 경우 청소키트의회전브러시를 터널 벽면에 밀착시킨 상태에서 세척수를 분사하면서 차량을 자연스럽게 이동시키게 되면 간편하고도 신속하게 터널 벽면을 청소할 수 있게 되므로 청소시간과 인력, 그리고 경비를 크게 절감할 수 있게 된다.Accordingly, a tunnel wall cleaning device has been proposed in which a rotating cleaning brush and a cleaning kit including a plurality of washing water spray nozzles are installed freely in a vertical direction in a vehicle equipped with a water tank. In this case, if you move the vehicle naturally while spraying the washing water while the cleaning kit is in close contact with the tunnel wall, you can easily and quickly clean the tunnel wall, which will greatly reduce the cleaning time, manpower and expenses. .

그러나 상기 종래의 터널 벽면 청소장치는 청소과정에서 터널 벽면으로 분사되어 오염된 터널 벽면을 닦아낸 세척수가 그대로 도로 바닥면으로 낙하되기 때문에 중금속을 포함하여 각종 인체유해물질이 포함되어 심각하게 오염된 상태의 세척수가 배수구를 통해 하천 등으로 배출되어 하천 등의 수질 및 그 주변 토양을 오염시키게 되는 등 환경공해를 유발하게 되는 문제가 있었다.However, since the conventional tunnel wall cleaning device is sprayed onto the tunnel wall during the cleaning process, the washing water that wipes the contaminated tunnel wall surface falls to the road floor as it is, and thus contains various human harmful substances including heavy metals. There was a problem that causes the environmental pollution, such as to be discharged to the rivers through the drain and to pollute the water quality and the surrounding soil.

또한 세척수가 터널 내부의 도로 바닥면에 유출되면 도로면이 매우 미끄러운 상태가 되기 때문에 교통소통에 막대한 지장을 주게 되고 각종 안전사고를 유발하게 되는 등의 문제가 있었다.In addition, when the wash water flows to the road floor inside the tunnel, the road surface becomes very slippery, which causes enormous obstacles in traffic communication and causes various safety accidents.

본 발명은 상기와 같은 종래의 실정을 감안하여 안출한 것이며, 그 목적이 회전브러시가 회전하면서 터널 벽면을 닦아낼 때에 터널 벽면으로 분사되는 세척수가 도로 바닥면에 떨어지지 않도록 하는 것에 의해 오염된 세척수의 배출로 인한 환경오염을 방지할 수 있도록 함은 물론 청소를 마친 후에 교통소통에 지장이 없도록 하여 각종 안전사고를 미연에 방지할 수 있도록 하는 터널 벽면 청소장치를 제공하는 데에 있는 것이다.The present invention has been made in view of the conventional situation as described above, the object of the washing water is contaminated by the washing water sprayed to the tunnel wall surface when the rotary brush is rotated to wipe the tunnel wall surface to prevent the fall of the road floor surface. It is to provide a tunnel wall cleaning device that can prevent the environmental pollution caused by the discharge, as well as to prevent various safety accidents by preventing traffic communication after cleaning.

도 1은 본 발명의 한 실시예의 측면도1 is a side view of one embodiment of the present invention

도 2는 동 실시예의 배면도2 is a back view of the embodiment;

도 3은 동 실시예의 사용상태도3 is a state diagram used in the embodiment

도 4는 동 실시예의 청소키트의 정면도4 is a front view of the cleaning kit of the embodiment;

도 5는 도 4의 A-A선 단면도5 is a cross-sectional view taken along the line A-A of FIG.

도 6은 동 실시예의 회전브러시의 요부 사시도6 is a perspective view of main parts of the rotating brush of the embodiment;

도 7은 동 실시예의 집수부위의 구성도7 is a configuration diagram of the collecting portion of the embodiment

<도면의 주요부분에 대한 부호 설명><Description of Signs of Major Parts of Drawings>

10 : 차량 20 : 청소키트10: vehicle 20: cleaning kit

21 : 회전브러시 21a : 전동모터21: rotating brush 21a: electric motor

21b : 플렉시블호스 21c : 스프링21b: flexible hose 21c: spring

22 : 세척수분사노즐 23 : 밀폐고무커버22: washing water spray nozzle 23: airtight rubber cover

24 : 집수구 25 : 공기분사노즐24: catch port 25: air spray nozzle

26 : 비산방지판 30 : 물탱크26: shatterproof plate 30: water tank

31 : 세척수저장부 32 : 폐수처리부31: washing water storage unit 32: waste water treatment unit

33 : 오수저장부 40 : 에어콤프레셔33: sewage storage unit 40: air compressor

본 발명은 상기의 목적을 달성하기 위하여 물탱크를 세척수저장부와 폐수처리부, 오수저장부로 구획 형성하여 오수저장부의 오수가 폐수처리부를 거쳐 세척수 저장부로 공급되도록 하는 한편, 회전브러시와 세척수분사노즐이 설치되는 함형 청소키트의 개구측 사방 둘레에 세척수 비산방지커버를 설치하고, 청소키트 하부에 마련되는 집수구와 오수저장부를 접속하여 터널 벽면에 분사되어 오염된 물이 오수저장부로 회수되도록 한 것 등을 특징으로 하며, 이하 그 구체적인 기술내용을 첨부도면에 의거하여 더욱 자세히 설명하면 다음과 같다.In order to achieve the above object, the water tank is divided into a washing water storage unit, a wastewater treatment unit, and a wastewater storage unit so that the sewage storage unit is supplied to the washing water storage unit through a wastewater treatment unit, while a rotating brush and a washing water spray nozzle are provided. Washing water scattering prevention cover is installed around the opening side of the installed type cleaning kit, and the water collecting port provided at the lower part of the cleaning kit and the sewage storage unit are connected to the tunnel wall so that the polluted water is recovered to the sewage storage unit. The present invention will be described in more detail based on the accompanying drawings.

즉, 도 1에서 도 7까지에는 본 발명의 한 실시예가 도시되어 있는 바, 본 발명은 회전브러시(21)와 다수의 세척수분사노즐(22)을 구비하는 함형 청소키트(20)와 물탱크(30)가 차량(10)의 후방에 설치되는 터널 벽면 청소장치를 구성함에 있어서, 상기 물탱크(30)를 세척수저장부(31)와 폐수처리부(32), 오수저장부(33)로 구획 형성하고 오수저장부(33)의 오수가 폐수처리부(32)를 거쳐 세척수저장부(31)로 공급되도록 하는 한편, 청소키트(20)의 개구측 사방 둘레에 밀폐고무커버(23)를 설치하고, 청소키트(20) 하부에 마련되는 집수구(24)와 오수저장부(33)를 접속하여 청소과정에서 터널 벽면(W)에 분사되어 오염되는 세척수가 오수저장부(33)로 회수되도록 하여서 되는 것이다.That is, an embodiment of the present invention is shown in Figures 1 to 7 bar, the present invention is provided with a cleaning kit 20 and a water tank (20) having a rotating brush 21 and a plurality of washing water spray nozzles (22) In constructing the tunnel wall cleaning apparatus installed at the rear of the vehicle 10, the water tank 30 is divided into a washing water storage unit 31, a wastewater treatment unit 32, and a wastewater storage unit 33. While the waste water of the sewage storage unit 33 is supplied to the washing water storage unit 31 through the waste water treatment unit 32, while installing a sealed rubber cover 23 around the opening side of the cleaning kit 20, By connecting the water collecting port 24 and the sewage storage unit 33 provided under the cleaning kit 20, the washing water sprayed onto the tunnel wall W during the cleaning process is recovered to the sewage storage unit 33. .

도시된 실시예는 도 4 및 도 5와 같이 청소키트(20)의 중앙부에 전동모터(21a)에 의해 구동되는 다수의 회전브러시(21)가 설치되고, 그 양측에 세척수분사노즐(22)과 공기분사노즐(25)이 설치되며, 밀폐고무커버(23)의 안쪽에 비산방지판(26)이 설치되는 형태로 되어 있다.4 and 5, a plurality of rotary brushes 21 driven by the electric motor 21a are installed at the center of the cleaning kit 20, and both sides of the washing water spray nozzle 22 are installed. The air spray nozzle 25 is installed, and the anti-scattering plate 26 is installed inside the sealed rubber cover 23.

그리고 도 6과 같이 원판형 회전브러시(21)와 전동모터(21a)의 사이에 스프링(21c)과 플렉시블호스(21b)가 설치되고, 청소키트(20)와 물탱크(30)의 사이에 세척수 분사와 오수의 회수를 위한 에어콤프레셔(40)가 설치되는 형태로 되어 있다.Then, as shown in FIG. 6, a spring 21c and a flexible hose 21b are installed between the disc-shaped rotary brush 21 and the electric motor 21a, and the washing water is disposed between the cleaning kit 20 and the water tank 30. The air compressor 40 for the injection and recovery of waste water is provided.

도면부호중 미설명부호 E는 도로 바닥면, 50은 배수구이다.Reference numeral E in the drawing denotes a road bottom surface, and 50 denotes a drain.

상기와 같이 구성된 본 발명에 있어서는 각 회전브러시(21)를 터널 벽면(W)에 밀착시킨 상태에서 세척수분사노즐(22) 및 공기분사노즐(25)을 통해 세척수와 공기를 분사하면서 차량(10)을 이동하게 되면 터널 벽면(W)을 간편하고 신속하게 청소할 수 있게 된다.In the present invention configured as described above, the vehicle 10 while spraying the washing water and air through the washing water spray nozzle 22 and the air spray nozzle 25 in a state in which each rotary brush 21 is in close contact with the tunnel wall (W). By moving the tunnel wall (W) can be easily and quickly cleaned.

상기의 청소과정에서 세척수분사노즐(22)을 통해 터널 벽면(W)에 분사되는 세척수는 공기분사노즐(25)을 분사되는 공기와 비산방지판(26)에 의해 비산이 최대한 억제되며, 터널 벽면(W)을 닦아내어 오염된 상태의 세척수는 청소키트(20)의 외부로 누출되지 않고 집수구(24)를 통해 물탱크(30)의 오수저장부(33)로 이송된다.In the cleaning process, the washing water sprayed onto the tunnel wall surface W through the washing water spray nozzle 22 is suppressed to the maximum by the air spraying the air spray nozzle 25 and the scattering preventing plate 26, and the tunnel wall surface. The washing water in the contaminated state by wiping (W) is transferred to the sewage storage unit 33 of the water tank 30 through the water collecting port 24 without leaking to the outside of the cleaning kit 20.

그리고 오수저장부(33)의 오수는 폐수처리부(32)에서 깨끗하게 정화되고 세척수저장부(31)로 공급되어 다시 사용할 수 있게 된다.And the sewage of the sewage storage unit 33 is cleanly purified by the wastewater treatment unit 32 and supplied to the wash water storage unit 31 can be used again.

한편 본 발명에 있어서는 전동모터(21a)와 회전브러시(21)의 사이에 스프링(21c)과 플렉시블호스(21b)가 설치되므로 터널 벽면(W)에 각 회전브러시(21)를 견고하게 밀착시켜 세척효율을 높일 수 있게 된다.Meanwhile, in the present invention, since the spring 21c and the flexible hose 21b are installed between the electric motor 21a and the rotary brush 21, each of the rotary brushes 21 is firmly adhered to the tunnel wall W and washed. Efficiency can be increased.

이상에서와 같이 본 발명은 청소키트(20)의 개구측 외곽 둘레에 밀폐고무커버(23)를 설치하여 터널 벽면(W)에 분사되는 세척수가 도로 바닥면(E)으로 떨어지는 것을 방지할 수 있도록 하는 동시에 집수구(24)를 통해 회수한 오염된 세척수를정화하여 재사용할 수 있게 한 것으로, 본 발명에 의하면 청소과정에서 중금속 등의 각종 인체유해물질이 포함되어 심각하게 오염된 세척수가 도로 바닥면(E)으로 낙하하여 배수구를 통해 하천 등으로 유출됨으로써 하천 등의 수질 및 그 주변 토양을 오염시키는 것을 방지할 수 있게 되므로 환경보호에 크게 이바지할 수 있게 되고, 청소를 마친 후에 교통소통에 전혀 지장을 주지 않게 되어 각종 안전사고를 예방할 수 있게 되며, 회수된 세척수를 정화시킨 후 재사용할 수 있게 되므로 세척수의 낭비를 최소화할 수 있게 되는 등의 효과를 얻을 수 있게 된다.As described above, the present invention installs a sealed rubber cover 23 around the outer periphery of the cleaning kit 20 to prevent the washing water sprayed on the tunnel wall surface W from falling onto the road floor surface E. At the same time, the contaminated washing water recovered through the catchment 24 can be purified and reused. According to the present invention, the washing water containing various human harmful substances such as heavy metals during the cleaning process is seriously contaminated and washed with water. E) to fall to the rivers through drains to prevent contamination of the water quality and the surrounding soil, so that it can greatly contribute to environmental protection, and after the cleaning is completely obstructed traffic communication It is possible to prevent various safety accidents, and to minimize the waste of the washing water since the recovered washing water can be purified and reused. And other effects that can be obtained.

Claims (3)

회전브러시(21)와 다수의 세척수분사노즐(22)을 구비하는 함형 청소키트(20)와 물탱크(30)가 차량(10)의 후방에 설치되는 것에 있어서, 상기 물탱크(30)를 세척수저장부(31)와 폐수처리부(32), 오수저장부(33)로 구획 형성하고 오수저장부(33)의 오수가 폐수처리부(32)를 거쳐 세척수저장부(31)로 공급되도록 하는 한편, 청소키트(20)의 개구측 사방 둘레에 밀폐고무커버(23)를 설치하고, 청소키트(20) 하부에 마련되는 집수구(24)와 오수저장부(33)를 접속하여 청소과정에서 터널 벽면(W)에 분사되어 오염되는 세척수가 오수저장부(33)로 회수되도록 한 것을 특징으로 하는 터널 벽면 청소장치.In the case where the type cleaning kit 20 and the water tank 30 having the rotating brush 21 and the plurality of washing water spray nozzles 22 are installed at the rear of the vehicle 10, the water tank 30 is washed with water. The storage unit 31, the waste water treatment unit 32, and the sewage storage unit 33 is partitioned and the waste water storage unit 33 is supplied to the wash water storage unit 31 through the waste water treatment unit 32, The sealing rubber cover 23 is installed around the opening sides of the cleaning kit 20, and the water collecting port 24 and the sewage storage unit 33 provided under the cleaning kit 20 are connected to each other so that the tunnel wall surface ( Tunnel wall cleaning device, characterized in that to be sprayed to W) to wash the contaminated wash water to the sewage storage (33). 제1항에 있어서, 청소키트(20)의 중앙부에 전동모터(21a)에 의해 구동되는 다수의 회전브러시(21)를 설치하고, 그 양측에 세척수분사노즐(22)과 공기분사노즐(25)을 설치하며, 밀폐고무커버(23)의 안쪽에 비산방지판(26)을 설치한 것을 특징으로 하는 터널 벽면 청소장치.The cleaning kit (20) according to claim 1, wherein a plurality of rotary brushes (21) driven by the electric motor (21a) are provided at the center of the cleaning kit (20), and the washing water spray nozzles (22) and the air spray nozzles (25) are provided on both sides thereof. Tunnel wall cleaning device, characterized in that the installation, shatterproof plate 26 is installed on the inside of the sealed rubber cover (23). 제2항에 있어서, 회전브러시(21)와 전동모터(21a)의 사이에 스프링(21c)과 플렉시블호스(21b)를 설치한 것을 특징으로 하는 터널 벽면 청소장치.The tunnel wall cleaning apparatus according to claim 2, wherein a spring (21c) and a flexible hose (21b) are provided between the rotary brush (21) and the electric motor (21a).
KR10-2003-0022196A 2003-04-09 2003-04-09 a tunnel wall cleaning apparatus KR100516024B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100822055B1 (en) * 2005-05-03 2008-04-16 신장호 United cleaning vehicle
KR102118684B1 (en) * 2019-09-03 2020-06-26 주식회사 태영티에스 Road tunnel cleaning vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI538018B (en) 2013-03-27 2016-06-11 Ngk Insulators Ltd Semiconductor substrate for composite substrate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100822055B1 (en) * 2005-05-03 2008-04-16 신장호 United cleaning vehicle
KR102118684B1 (en) * 2019-09-03 2020-06-26 주식회사 태영티에스 Road tunnel cleaning vehicle

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