JP2009263952A - Mobile cleaning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile cleaning apparatus capable of a high cleaning rate, cleaning even locations where obstacles and cross-sectional changes are present, and reducing both danger associated with work and environmental burdens. <P>SOLUTION: The mobile cleaning apparatus (1) for cleaning objects arranged along a movement path while moving comprises a moving means (10); a nanobubble water spraying device (20) mounted to the moving means (10) for spraying nanobubble water toward the objects; and a high-pressure jetting device (30) mounted to the moving means (10) arranged in a rear position of the nanobubble water spraying device (20) with respect to the direction of movement of the moving means (10) for jetting high-pressure water to the objects previously sprayed with the nano bubble water by the nano-bubble water spraying device (20) with the movement of the moving means (10). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a mobile cleaning device for cleaning while moving, for example, a wall surface of a tunnel.

  When cleaning the wall surface of the tunnel, it is generally performed by a cleaning vehicle equipped with a contact-type cleaning device that uses soapy water or the like to clean it with a rotating brush or the like.

  However, the cleaning speed of such a contact-type cleaning apparatus is slow, and it is necessary to regulate traffic in order to reduce the traveling speed of the vehicle. Also, it cannot be washed smoothly in places where there are obstacles such as guard fences, sign boards, or where there are large irregularities on the tunnel wall such as a shelter. Furthermore, a large amount of soap water generated after washing becomes an environmental problem. In addition, dirt that burns and adheres to gasoline is difficult to remove and may require manpower, and when such work is performed at a high place, there is a risk that an operator may fall.

  Even when there are obstacles, there are large irregularities on the surface to be cleaned such as a wall surface, or when the cleaning place is at a high place, the present invention can be cleaned at a higher speed, smoothly and safely. It is an object of the present invention to provide a mobile cleaning device that can perform work and reduce the environmental load.

That is, the present invention
A mobile cleaning device (indicated by reference numeral 1 in the embodiment described below, the same applies hereinafter) for cleaning an object arranged along a moving path while moving.
Moving means (10);
A nanobubble water spraying device (20) mounted on the moving means (10) and spraying nanobubble water toward the object;
A high-pressure water injection device (30) mounted on the moving means (10), which is disposed at a rear position of the nanobubble water spraying device (20) on the basis of the moving direction of the moving means (10); Along with the movement of the moving means (10), the high pressure water injection device (30) for injecting the high pressure water onto the object to which the nano bubble water spray device (20) has previously sprayed the nano bubble water;
A mobile cleaning device (1) is provided.

  According to the mobile cleaning device configured in this way, there are obstacles that make it difficult to work with the conventional contact-type cleaning device, the surface to be cleaned is at a high place, or there are large irregularities. Even in such a case, smooth cleaning can be performed without human intervention. Further, nanobubble water has a cleaning action even if it does not contain a detergent. In the apparatus according to the present invention, this nanobubble water is first sprayed on the surface to be cleaned, and the high pressure is applied after a predetermined time as the moving means moves. Water is sprayed to blow away the dirt that has floated from the surface to be cleaned by the nanobubbles, and the cleaning operation can be performed while moving the vehicle. For this reason, it is possible to perform the work without stopping the traffic which is necessary when the tunnel wall surface is cleaned by a conventional cleaning apparatus. Furthermore, since no detergent is used, the burden on the environment is reduced.

  Specifically, the nanobubble water storage tank (60) mounted on the moving means (10) is provided, and the nanobubble water spray device (20) receives the supply of nanobubble water from the nanobubble water storage tank (60). Spraying can be performed.

  The inventor of the present application has verified that the nanobubbles in the nanobubble water stay in the water for a considerably long period of time, and utilizes such properties of the nanobubble water, and the cleaning device is not equipped with the nanobubble generator. Also, nanobubbles made in advance are stored in a tank so that they can be washed.

  The high-pressure water injection device (30) can spray high-pressure water with a discharge water pressure of 10 to 20 MPa on the object. By comprising in this way, a cleaning effect can be improved more. Here, the pressure is a discharge pressure from the pump.

  Furthermore, the moving means (10) can be configured to be either a road vehicle or a track vehicle.

  Here, the “object” includes a tunnel tile wall surface such as a magnetic tile wall, a glass wall, an ALC plate, and a concrete wall in the tunnel, and equipment (guardrail, guard pipe, lighting, etc.) installed in the tunnel, tunnel Other constructions on the road (guardrails, sound insulation walls, wall lanterns, soundproof walls, concrete railings, etc.), wall surfaces / glass / floor of building structures, toilet tiles, resin boards, artificial / natural stones, etc. The mobile cleaning device of the present invention is particularly effective for cleaning the inner wall surface of the tunnel.

  The high-pressure water injection device (30) includes one or a plurality of high-pressure water injection units (31), and each high-pressure water injection unit includes a hydraulic or manual arm (32) that constitutes a parallel link mechanism. It can also be configured to be attached to the moving means. With this configuration, the vertical position can be appropriately changed while the front surface of each unit faces the object.

  Hereinafter, the mobile cleaning apparatus of the present invention will be described in detail with reference to the drawings.

  As shown in FIGS. 1 to 4, in the mobile cleaning device 1 of the present embodiment, a nanobubble water spray device 20 and a high-pressure water injection device 30 are mounted on a road vehicle 10 as a moving means.

  The road vehicle 10 is a so-called truck-like four-wheeled vehicle, and includes a cab 11 having a driver's seat and an engine, and a loading platform portion 12.

  The nano bubble water spray device 20 is a device that sprays nano bubble water toward an object such as a tunnel wall surface to be cleaned, and includes a spray nozzle equipment 21 that is installed near the cab 11 in the loading platform portion 12.

  The spray nozzle equipment 21 is composed of a vertically long equipment body and a plurality of spray nozzles (three in the present embodiment, not shown) provided in the equipment body at predetermined intervals in the vertical direction. Here, the spray nozzle is not particularly limited, and various types can be used. However, trade names “VNP-65-56”, “VNP-65-56”, “VNP-40-25”, etc., manufactured by Ikeuchi Co., Ltd. can be used. Can be used.

  The high-pressure water injection device 30 includes a plurality (three in the present embodiment) of high-pressure water injection units 31 disposed at the rear of the cargo bed portion spaced apart from the nanobubble water spray device 20.

  The distance between the nano bubble water spray device 20 and the high pressure water injection device 30 is determined by the nano bubble water sprayed by the nano bubble water spray device when the mobile cleaning device 1 is run at a running speed of 10 to 30 km / h. From the viewpoint of washing with high pressure water after sufficiently wetting, it is preferably 0.5 to 1.5 m.

  Each unit 31 has the same shape, and is fixed to a unit fixing member 33 fixed on the loading platform via a foldable arm 32 as shown in FIG. As shown in FIG. 4, each unit 31 has a rectangular front surface portion 31 a that is opposed to an object at the time of cleaning, and a plurality of (13 in this embodiment) injection nozzles 31 b on the diagonal of the front surface portion 31 a. Is provided. In the illustrated embodiment, the arm 32 forms a parallel link mechanism as shown in FIG. 3, and can be appropriately positioned in the vertical direction with the front surface portion 31a facing the object. In the example shown in FIG. 2, the injection nozzles 31b of the three units 31 are disposed obliquely from the upper position to the lower position as a whole, and are supplied from the external high-pressure water supply device via the pipe 31c. Can be sprayed almost uniformly over the entire height direction of the object. Here, various types of spray nozzles can be used without particular limitation, but trade names “DSP-12-83”, “VNP-25-56”, etc., manufactured by Ikeuchi Co., Ltd. can be used.

  A fuel tank 40 is disposed on the left side, and a nanobubble generator 50 is disposed on the right side at approximately the center in the front-rear direction of the loading platform portion 12. A nano bubble water storage tank 60 for storing nano bubble water is disposed on the right side of the unit fixing member 33, and a high pressure water supply device 70 is disposed in front of the nano bubble generator 60.

  The nanobubble generator 50 and the nanobubble water storage tank 60 are connected by a pipe 51, and the nanobubble water storage tank 60 and the high-pressure water supply apparatus 70 are connected by a pipe 61. And the high pressure water supply apparatus 70, the nano bubble water spray apparatus 20, and the high pressure water injection apparatus 30 are connected with piping 71 and 72, respectively.

  As the nanobubble generator, for example, the product name “BUVITAS” manufactured by Kyowa Kikai Co., Ltd. is suitable.

  The cleaning operation by the mobile cleaning device 1 of the present embodiment is performed as follows.

  Nanobubble water is produced by the nanobubble water generator 50 and stored in the nanobubble water storage tank 60.

  The nanobubble water stored in the nanobubble water storage tank 60 is supplied to the high-pressure water supply device 70 through the pipe 61 to be increased in pressure, and is supplied to the spray nozzle equipment 21 and each high-pressure water injection unit 31 through the pipes 71 and 72.

  From the spray nozzle equipment 21, nano bubble water is sprayed onto the object in the form of a mist, and from each high-pressure water injection unit 31, nano bubble water is sprayed onto the object as a jet jet. Since these operations are performed while moving the mobile cleaning device, first, mist-like nanobubble water is sprayed on the object, and a jet of nanobubble water is sprayed after a certain period of time. Nanobubble water has its surface active action, etc., the dirt on the surface of the target object sprayed with nanobubble water floats up from the surface for a certain period of time, and a high-pressure nanobubble jet is sprayed on this surface, Dirt is removed.

  Since the mobile cleaning device can perform the above-described cleaning while traveling at a speed of 10 to 30 km / h, the mobile cleaning device can perform cleaning without causing much trouble in traffic.

  As nanobubble water, as shown in FIG. 7, water containing 500,000 / milliliter to 5,000,000 / milliliter of fine bubbles having an average particle diameter of 2 μm or less, more preferably 10 nm to 1 μm can be preferably used. . In addition, the particle size distribution of the fine bubbles in the nanobubble water preferably used in the present invention is the ratio of the fine bubbles of each particle size to the total volume of all the fine bubbles (volume ratio, volume of fine bubbles of a specific particle size / fine bubbles The total volume of fine bubbles of 2 μm or less is preferably 80% or more of the total volume of all the bubbles as shown in FIG. Here, FIG. 7 is a measurement graph of the particle size distribution of nanobubble water preferably used in the present invention, and the particle size distribution was measured using a particle size distribution measuring apparatus described later.

  Such nanobubble water is preferably used for obtaining the desired effect of the present invention.

  Here, nanobubble water will be described in contrast to microbubbles. Nanobubbles have a particle size about 1/1000 that of so-called microbubbles, have a negative charge, and have a stronger surface activity than microbubbles. . In addition, it has been confirmed that most of the microbubbles do not rise for more than 3 months, whereas microbubbles rise and scatter in a few minutes after being generated in water. For this reason, the nanobubble water made with the nanobubble generator can be put into a container and stored for a long time while maintaining the function as nanobubble water.

  In addition, the longer the operation time of the nanobubble production apparatus when producing nanobubble water, the greater the number of bubbles generated. Therefore, it is desirable to generate a large amount of nanobubbles by circulating for a sufficient time. It is preferably used for obtaining the effect.

  Therefore, the bubble generating device in the above-described embodiment can be omitted, and nanobubble water can be made elsewhere, supplied directly to the nanobubble water storage tank 60, stored, and used.

  The principle of removing dirt by the mobile cleaning device of the present invention is considered as follows. That is, since nanobubble water has a small surface tension and high permeation performance, when nanobubble water is sprayed on the target surface, it penetrates into contaminants such as dust on the target surface. Then, the charged nanobubbles adhere to these contaminants, and the contaminants are easily peeled off from the object. Further, by spraying high-pressure water here, the object can be peeled off from the surface of the object.

  Further, other conditions are preferably in the following ranges.

  The temperature of the nanobubble water to be sprayed is preferably 30 to 50 ° C. when sprayed from the spray nozzle from the viewpoint of further improving the cleaning effect.

Moreover, it is preferable from the point of the washing | cleaning effect and economical efficiency that the spray amount of nano bubble water shall be 0.01-0.1 liter per 1 m < ² > of target objects.

  The distance from the spray nozzle to the object is not particularly limited as long as the mist-like nanobubble water particles adhere to the object in a desired amount.

  The temperature of the high-pressure water is preferably 30 to 50 ° C. from the viewpoint of further improving the cleaning effect.

The spraying amount is preferably 0.8 to 1.6 liters per 1 m ² of the object from the viewpoint of cleaning effect and economy.

  As mentioned above, although embodiment concerning this invention was described, this invention is not limited to these embodiment, In the range which does not deviate from the meaning of this invention, it can change variously.

  For example, in the above-described embodiment, a road vehicle has been described as an example, but the present invention can be applied to a track vehicle such as a railway, a ship, and the like.

  Moreover, although the case where nano bubble water was used as high pressure water sprayed as a jet jet was demonstrated, normal tap water etc. can also be used.

  Further, the high pressure water jet unit may be attached to the moving means by using a unit storing mechanism such as an attaching means other than the arm, for example, a manual unit using rails.

  The number of spray nozzles and high-pressure water injection units may be one without providing a plurality.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention further more concretely, this invention is not restrict | limited to these.

[Test Example 1]
As a preliminary experiment (indoor experiment), a high-pressure washing ability test of water, microbubble water, and nanobubble water was performed as follows, and the results shown in Table 1 were obtained.

  First, a 1 m × 2 m glass plate shown in FIG. 5 was used in a tunnel for half a year to be contaminated, and then cut into 0.5 m × 0.5 m was used as a test object. The initial brightness of the test object was 70.9, and the brightness before washing was 55-60.

  Next, toward the point C of the test object shown in FIG. 5, water, microbubble water, and nanobubble water are respectively used at the water temperature at the time of injection shown in Table 1, the distance from the injection nozzle to the test object, and the injection time. Cleaning was performed by spraying.

  Further, the injection is performed toward the point C of the object shown in FIG. 5, and the evaluation is performed not only at the point C, but also at the points b and d 5 cm away from the C point to the left and right, and the points a and e that are 15 cm away. I also did it.

  The lightness standard after cleaning in this test was 70. As a result, the microbubble water did not satisfy the predetermined target brightness. In addition, although both nanobubble water and tap water were satisfactory in lightness, when expressed in terms of area ratio in the area that can be cleaned, nanobubble water can be cleaned over 2.5 times the area of tap water per unit time. In this respect, nanobubble water showed a remarkable effect.

  Here, the nanobubble water is obtained by treating the water with a nanobubble generator (product name “BUVITAS” manufactured by Kyowa Kikai Co., Ltd.). Water containing at a rate of not less than pieces / milliliter was used.

  Moreover, as microbubble water, the water which contains the fine bubble with an average particle diameter of 10-100 micrometers or more obtained by processing tap water using a commercially available microbubble generator was used. The specifications of the nanobubble generator were as follows: power supply: three-phase 200 V, 1.95 Kw, flow rate: 67 L / min, lift: 60 m, liquid temperature: 5-60 ° C.

  The lightness is measured with a contact-type color difference meter (trade name “CR-300”, manufactured by MINOLTA), and the higher the value, the better the lightness.

  In addition, the particle size and the number of particles of the nanobubbles were measured using a particle size distribution analyzer (trade names “Coulter Multisizer 3”, “LS 13 320” manufactured by Beckman Coulter).

  As the injection nozzle, a product name “DSP-12-83” manufactured by Ikeuchi Co., Ltd. was used.

  As is clear from the results shown in Table 1, it can be seen that nanobubble water exhibits a high cleaning effect. From other tests, it was confirmed that the water pressure is higher, the distance from the injection nozzle to the object is better, and the water temperature is 40 ° C., which is highly effective.

  Moreover, tap water (soap water) is normally used when cleaning is performed by a conventional brush type cleaning method. Separately from the above-described tests, a cleaning test was performed by a conventional brush-type cleaning method using nanobubble water instead of the tap water (soap water). As a result, it was confirmed that a high cleaning effect was obtained without using a detergent or the like.

[Example 1 and Comparative Example 1 (confirmation of effectiveness of pre-spraying)]
Using the mobile cleaning device shown in FIG. 1, nanobubble water was sprayed while the mobile cleaning device itself was running, and then a high pressure water was jetted to perform a cleaning experiment. As the object, the same glass plate as the test object used in the above-described test example was similarly provided with pseudo stains, and each point shown in FIG.

Moreover, it tested about the system (comparative example) which does not spray nanobubble water separately but performs only high pressure water injection of nanobubble water. These results are shown in Table 2.
The test conditions were as follows.
Test conditions-Distance to the object: 1.0m
・ Movement speed of the cleaning device: 2.0 km / h
・ Water pressure: Injection 20.0Mpa
-Spray nozzle: VNP-40-25
・ Injection nozzle: VNP-25-56

表２に示す結果から本発明のようにナノバブル水の噴霧を行なうことにより、噴霧を行わない場合に比して面積比で５倍以上の高い清掃効果が得られることが判る。このことから本発明の装置が高速での移動洗浄を可能としたものであり、道路やトンネル内部の清掃に好適であることが判る。

From the results shown in Table 2, it can be seen that by performing spraying of nanobubble water as in the present invention, a high cleaning effect of 5 times or more in area ratio can be obtained as compared with the case where spraying is not performed. From this, it can be seen that the apparatus of the present invention enables high-speed mobile cleaning and is suitable for cleaning roads and tunnels.

[Example 2 and Comparative Example 2]
Using the mobile cleaning apparatus shown in FIG. 1, nanobubble water was sprayed while the mobile cleaning apparatus itself was running, and then a high pressure water was jetted to perform a cleaning experiment.
1. Object to be cleaned Prepare test piece 1 with glass plate affixed to existing 30 m concrete wall and test piece 2 with magnetic tile affixed on the glass plate surface and magnetic tile surface of test pieces 1 and 2 The object to be cleaned was sprayed with imitation dirt that approximated the exhaust gas (specifically, a test contaminant containing 9% by weight of carbonized material, 73% by weight of ethanol, and 18% by weight of tap water was sprayed. .)
The target dirt was evaluated by brightness, and the glass was 55-60, and the porcelain tile was 65-70.
2. Determination of degree of cleaning The degree of cleaning was evaluated as lightness, and the standard lightness was evaluated as 68 for glass plates and 88 for magnetic tiles.
3. Experimental conditions Conditions: Water pressure 20 Mpa
Distance from object to injection position: 1m
Water temperature: 10 ° C
Traveling speed: The speed test results shown in Table 3 are shown in Table 3 below.

  As is apparent from the results shown in Table 3, the use of the mobile cleaning device of the present invention configured to spray high-pressure water of nanobubble water after spraying nanobubble water does not hinder other traffic. It can be seen that a high cleaning effect can be obtained while moving the mobile cleaning device at a speed.

  In addition, in the apparatus which employ | adopted the brush type washing | cleaning system of the conventional system, since a brush is made to contact an object surface and it cleans, from the surface of work safety | security, cleaning can only be implemented at 2 km / h.

  As described above, since the mobile cleaning device of the present invention can be effectively cleaned while moving at a certain speed, it can be used for cleaning around the road and inside the tunnel. Also, as a cleaning device for the body of transportation means (Shinkansen, airplane, bus, etc.) and building structures (curtain walls, tile walls, floors, etc.), it can be cleaned in a non-contact manner regardless of the place to be cleaned. It is efficient and optimal.

FIG. 1 is a side view of the mobile cleaning apparatus of the present invention. FIG. 2 is a top view showing the top surface of the mobile cleaning apparatus shown in FIG. FIG. 3 is a rear view showing the back of the mobile cleaning device shown in FIG. 1 while omitting units and tanks other than the middle injection unit. FIG. 4 is a plan view showing a front portion of each injection unit in the mobile cleaning apparatus shown in FIG. FIG. 5 is a plan view showing the cleaning object used in the test example. FIG. 6 is a plan view showing the cleaning object used in the example. FIG. 7 is a graph showing the particle size distribution of fine bubbles in nanobubble water.

Explanation of symbols

Mobile cleaning device 1; Road vehicle main body 10; Nano bubble water spray device 20; High pressure water spray device 30; Cab 11; Loading platform portion 12; Spray nozzle equipment 21; High pressure water spray unit 31; Front part 31a; Injection nozzle 31b; Pipe 31c; Fuel tank 40; Nano bubble generator 50; Nano bubble water storage tank 60; High-pressure water supply apparatus 70; Pipe 51; Pipe 61;

Claims (6)

A mobile cleaning device for cleaning an object arranged along a moving path while moving,
Transportation means;
A nanobubble water spraying device mounted on the moving means and spraying nanobubble water toward the object;
A high-pressure water jetting device mounted on the moving means, which is disposed at a rear position of the nanobubble water spraying device on the basis of the moving direction of the moving means, and with the movement of the moving means, the nanobubble water spraying A high-pressure water injection device for injecting high-pressure water onto an object to which the device has previously sprayed nanobubble water;
A mobile cleaning device.   The mobile cleaning device according to claim 1, further comprising a nano bubble water storage tank mounted on the moving means, wherein the nano bubble water spray device receives the supply of nano bubble water from the nano bubble water storage tank to perform spraying.   The mobile cleaning device according to claim 1 or 2, wherein the high-pressure water injection device sprays high-pressure water having a discharge water pressure of 10 to 20 MPa.   The mobile cleaning apparatus according to claim 1, wherein the moving means is a road vehicle or a track vehicle.   The mobile cleaning apparatus according to any one of claims 1 to 4, wherein the target object is a tunnel inner wall surface and a structure on the road arranged along the moving path. The high pressure water injection device includes one or a plurality of high pressure water injection units,
6. The mobile cleaning device according to claim 1, wherein each high-pressure water jet unit is attached to the moving means by an arm that constitutes a parallel link mechanism.

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