JP2012036666A - Dust suppression system and dust suppression method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust suppression system and a dust suppression method capable of effectively suppressing dust generation while executing a civil engineering work with a hydraulic shovel.SOLUTION: The present invention comprises: a liquid spray device 20 having a nozzle 21 which is attached in the proximity of a bucket 15 of a hydraulic shovel 10 and sprays liquid 20a over a dust generation source to suppress dust, and supply means 22 to supply the nozzle 21 with the liquid 20a; and control means 30 which controls a spraying operation of the liquid spray device 20 to spray the liquid 20a and an operation of the bucket 15 simultaneously. Thus, the invention can moisturize soil and attach the liquid to the generated dust.

Description

  The present invention relates to a dust suppression system and a dust suppression method that suppress generation of dust associated with civil engineering work.

Dust generated when excavating earth and sand with a hydraulic excavator and carrying out civil works such as loading sand on a transport vehicle has an impact on the health of workers and surrounding residents. Water was sprayed using and the dust was controlled. However, since it is watering by hand, it is less effective for manpower, and in addition, it was necessary to focus on ensuring safety.
Therefore, there has been a case where dust generated due to civil engineering work is suppressed by using a watering device (see, for example, Patent Document 1) used for building demolition or the like. Thereby, it is not necessary to perform watering manually, and safety can be ensured.

JP 2009-202048 A

  However, when a watering device dedicated to watering as in Patent Document 1 is used, this watering device and a hydraulic excavator for performing civil engineering work must be prepared. In some cases, problems such as narrowing of the screen occur.

  An object of the present invention is to provide a dust suppression system and a dust suppression method capable of effectively suppressing generation of dust accompanying civil engineering while performing civil engineering with a hydraulic excavator.

In order to solve the above problems, the invention according to claim 1 is a dust suppression system, which is disposed near a bucket attached to the tip of an arm of a hydraulic excavator and is directed toward a dust generation source. A liquid ejecting apparatus comprising: a nozzle that ejects a liquid for suppressing the liquid; and a supply unit that supplies the liquid to the nozzle.
Control means for interlockingly controlling the liquid ejecting operation by the liquid ejecting apparatus and the operation of the bucket is provided.

  According to a second aspect of the present invention, in the dust suppression system according to the first aspect, the liquid ejection direction of the nozzle is set to be inclined toward the lower surface side of the arm with respect to the length direction of the arm. It is characterized by being.

According to a third aspect of the present invention, in the dust suppression system of the first or second aspect, the liquid ejecting apparatus has an air supply means for supplying compressed air to the nozzle,
The nozzle is configured to be capable of jetting liquid in a mist form by mixing with compressed air.

  Invention of Claim 4 is a dust suppression system as described in any one of Claims 1-3. WHEREIN: Surfactant is mixed in the liquid supplied by the said supply means, It is characterized by the above-mentioned. .

Invention of Claim 5 is the dust suppression method which suppresses generation | occurrence | production of the dust accompanying the operation | movement of a hydraulic shovel by the dust suppression system as described in any one of Claims 1-4,
When the soil is excavated and scooped up by the bucket, the liquid ejecting device ejects liquid toward the opening of the bucket.

  According to a sixth aspect of the present invention, in the dust suppression method according to the fifth aspect, when the earth and sand scooped up by the bucket is loaded on the loading platform of the transport vehicle, the liquid ejecting device is directed toward the loading platform. It is characterized by ejecting a liquid.

According to the present invention, a nozzle that is disposed near a bucket attached to the tip of an arm of a hydraulic excavator, injects a liquid for suppressing the dust toward a dust generation source, and supplies the liquid to the nozzle. For example, excavation of earth and sand with the hydraulic excavator. While performing the work or the work of loading the excavated earth and sand on the loading platform of the transport vehicle, generation of dust can be effectively suppressed by the liquid ejecting apparatus.
That is, for example, when excavating and crushing earth and sand with a hydraulic excavator or when loading the raised earth and sand on a loading platform of a transportation vehicle, the liquid can be wetted by spraying liquid toward the earth and sand, and the generated dust By adhering liquid to the surface, gravity sedimentation can be improved and dust can be prevented from diffusing. Further, by linking the liquid ejecting operation by the liquid ejecting apparatus and the operation of the bucket, the liquid can be ejected to the earth and sand only when necessary, so that the liquid ejection amount can be reduced.
As a result, as compared with the conventional case where civil engineering work is performed using a watering device dedicated to watering separately from the hydraulic excavator, the cost can be surely reduced and the reduction of the site area can be surely prevented. be able to.

It is a figure which shows the outline | summary of the dust suppression system which concerns on this invention. It is explanatory drawing which shows an example of operation | movement of a hydraulic shovel and a liquid injection apparatus. It is explanatory drawing which shows an example of operation | movement of a hydraulic shovel and a liquid injection apparatus.

  Embodiments of the present invention will be described below with reference to the drawings.

  As shown in FIGS. 1 to 3, the dust suppression system of the present embodiment is disposed near the bucket 15 attached to the tip of the arm 14 of the excavator 10, and the dust is directed toward the dust generation source. A liquid ejecting apparatus 20 having a nozzle 21 for ejecting a liquid 20a for suppression, and a supply means 22 for supplying the liquid 20a to the nozzle 21, and an ejecting operation of the liquid 20a by the liquid ejecting apparatus 20; Control means 30 for interlocking control of the operation of the bucket 15 is provided.

As shown in FIGS. 2 and 3, the hydraulic excavator 10 includes a moving body 11, a revolving body 12 that is turnably provided on the moving body 11, and a front portion of the revolving body 12. A boom 13 pivotally supported on the head, an arm 14 pivotally supported on the tip of the boom 13 so as to be pivotable in the front-rear direction, and a pivot supported on the tip of the arm 14 so as to be pivotable in the front-rear direction. The bucket 15 is provided.
Further, the work arm body including the boom 13, the arm 14, and the bucket 15 can be operated by a hydraulic system including hydraulic cylinders such as the boom cylinder 12a, the arm cylinder 13a, and the bucket cylinder 14a. ing.
The bucket 15 has an opening 15 a for taking in and out the earth and sand D and the like, and is attached to the tip of the arm 14 so that the opening 15 a faces the lower surface side of the boom 13 and the arm 14. ing.

As shown in FIGS. 2 and 3, the liquid ejecting apparatus 20 includes the nozzle 21 and the supply unit 22.
The nozzle 21 is attached to the side surface of the arm 14, and the liquid ejecting direction is set to be inclined toward the lower surface side of the arm 14 with respect to the length direction of the arm 14. That is, the nozzle 21 is attached to the side surface of the arm 14 in such a manner that the injection port is inclined downward with respect to the length direction of the arm 14.

The supply means 22 is installed at the upper part of the revolving body 12 and stores a liquid 20a. The supply means 22 is disposed along the boom 13 and the arm 14 from the tank 22a, and the tank 22a and the nozzle. And a hose 22b for connecting to the H.21.
Although not shown, the tank 22a is provided via a water conduit connected to the lower portion of the tank 22a, and the liquid 20a from the tank 22a is pressurized by driving a motor to press the hose 22b and the nozzle 21. It is configured to operate in combination with a water pump that feeds water to the side.

In the present embodiment, the liquid 20a stored in the tank 22a is jetted from the nozzle 21 by feeding water to the hose 22b / nozzle 21 side by a water pump. In addition to spraying 20a, it may be sprayed (sprayed) in the form of a mist.
That is, in order to inject the liquid 20a in the mist form in this way, an air supply means (not shown) for supplying compressed air to the nozzle 21 is installed on the upper part of the revolving body 12 together with the supply means 22. In addition, a nozzle 21 that mixes the liquid 20a with compressed air and jets it in a mist form is used. In other words, the nozzle 21 employs a two-fluid spray nozzle that mixes and sprays the liquid 20a divided into two systems and compressed air, and pulverizes and atomizes the liquid 20a with a high-speed air flow. be able to.
Thus, the amount of muddy water generated with civil engineering work can be reduced by spraying the liquid 20a in the form of mist toward the earth and sand D. Moreover, since it is in the state mounted in the hydraulic shovel 10, generation | occurrence | production of dust can be suppressed greatly not only when earth and sand D are loaded on the loading platform 40a of the transport vehicle 40 but also during civil engineering work.

In the present embodiment, water is used as the liquid 20a. However, a surfactant may be mixed in the liquid 20a and supplied by the supply means 22.
The surfactant has a surface active function of reducing the surface tension of the liquid at the interface with the substance, and exhibits such a function by being adsorbed on the interface. Therefore, if the surfactant is pulverized and mixed in advance in the liquid 20a by about 3 to 5% by weight, the sedimentation action on the earth and sand D and dust is promoted, and the earth and sand D and dust are attached with moisture.・ It becomes easy to absorb and wet easily.
Moreover, since the earth and sand D and dust which once settled are added with moisture and the weight of the surfactant, they do not rise easily and re-float.

As shown in FIG. 1, the control unit 30 includes a control unit that is a main body and a bucket angle detection unit 31 that detects a rotation angle of the bucket in the front-rear direction.
The control unit may be provided in the vicinity of the revolving body 12 or may be provided in the vicinity of the bucket 15.
The bucket angle detection means 31 is provided along the arm 14 and detects the rotation angle of the bucket 15 by detecting the operation of a bucket cylinder 14a for rotating the bucket 15. Yes.
That is, the bucket cylinder 14a is a hydraulic cylinder as described above, and the hydraulic cylinder employed in the hydraulic excavator is linked to the movement of the cylinder rod sliding along the length direction so that the bucket 15 It is configured to rotate. Therefore, the rotation angle of the bucket 15 can be detected by detecting the operation of the bucket cylinder 14a by the bucket angle detection means 31.

Then, as shown in FIG. 1, the control means 30 receives the signal from the bucket angle detection means 31 in this way, the control section determines the rotation angle of the bucket 15, and the control section ejects the liquid 20a. When the power angle is recognized, a control is performed such that a signal is transmitted to the liquid ejecting apparatus 20 side to eject the liquid 20a.
The control unit 30 may be configured to be able to set the ejection time of the liquid 20a by the liquid ejecting apparatus 20. That is, by controlling the ejection time of the liquid 20a, it is possible to eject the liquid 20a as much as necessary for the earth and sand D and dust, prevent the unnecessary ejection of the liquid 20a, and reduce the ejection amount. .

Next, the dust suppression method which suppresses generation | occurrence | production of the dust accompanying the operation | movement of the hydraulic excavator 10 with the above dust suppression systems is demonstrated.
First, the excavator 10 is run and placed at an arbitrary place on the work site.
Subsequently, civil engineering work such as excavation work of earth and sand D is performed by the hydraulic excavator 10.
Then, as shown in FIG. 1, there are times when the earth and sand D is excavated and scooped up by the bucket 15 in the civil engineering flow. At that time, the liquid ejecting apparatus 20 ejects the liquid 20a toward the opening 15a of the bucket 15 to wet the earth and sand D in the bucket 15 and suppress the generation of dust.

Subsequently, in the civil engineering work flow, there is a time when the earth and sand D thus scooped up by the bucket 15 is loaded on the loading platform 40a of the transport vehicle 40. At that time, the liquid ejecting device 20 ejects the liquid 20a toward the loading platform 40a, wets the earth and sand D loaded on the loading platform 40a, and suppresses the generation of dust.
That is, when such earth and sand D is loaded on the loading platform 40a, the liquid 20a may not spread into the bucket 15 even if the liquid 20a is sprayed onto the earth and sand D before loading. In such a case, dust is generated when the earth and sand D is loaded on the loading platform 40a.
According to the dust suppression method of the present embodiment, it is possible to prevent the generation of dust when the earth and sand D is loaded.

According to the dust suppression method of the present embodiment, generation of dust during civil works can be suppressed as described above. That is, a lot of dust may be generated when the earth and sand D is scooped up or when the scooped earth and sand D is loaded on the loading platform 40a of the transport vehicle 40. The apparatus 20 can eject the liquid 20a to suppress generation of dust.
In addition, it cannot be overemphasized that the dust suppression system and dust suppression method of this Embodiment can be employ | adopted for various civil engineering works, such as cut construction and embankment construction.

According to the present embodiment, the nozzle 21 is disposed in the vicinity of the bucket 15 attached to the tip of the arm 14 of the excavator 10 and injects the liquid 20a for suppressing the dust toward the dust generation source. And a liquid ejecting apparatus 20 having a supply means 22 for supplying the liquid 20a to the nozzle 21, and a control means for controlling the operation of ejecting the liquid 20a by the liquid ejecting apparatus 20 and the operation of the bucket 15 in conjunction 30, the liquid ejecting device 20 generates dust while performing excavation work of the earth and sand D, loading the excavated earth and sand D onto the loading platform 40a of the transport vehicle 40, and the like. Can be effectively suppressed.
That is, for example, when excavating the earth and sand D with the excavator 10 or when the earth and sand D is loaded on the loading platform 40 a of the transport vehicle 40, the liquid 20 a is jetted toward the earth and sand D to thereby remove the earth and sand D. In addition to being wetted, the liquid 20a can be adhered to the generated dust to improve gravity sedimentation and prevent the dust from diffusing. Furthermore, the liquid 20a can be ejected onto the earth and sand D only when necessary by linking the operation of ejecting the liquid 20a by the liquid ejecting apparatus 20 and the operation of the bucket 15, thus reducing the amount of liquid 20a ejected. can do.
As a result, as compared with the conventional case where civil engineering work is performed using a watering device dedicated to watering separately from the hydraulic excavator 10, the cost can be surely reduced and the area of the site can be surely reduced. Can be prevented.

D Earth and sand 10 Hydraulic excavator 13 Arm 14 Bucket 20 Liquid injection device 20a Liquid 21 Nozzle 22 Supply means 30 Control means 40 Transport vehicle (dump truck)

Claims (6)

A nozzle that is disposed near a bucket attached to the tip of an arm of a hydraulic excavator and that injects a liquid for suppressing the dust toward a dust generation source; and a supply means for supplying the nozzle with the liquid A liquid ejecting apparatus comprising:
A dust suppression system, comprising: a control unit that interlocks and controls the liquid ejecting operation of the liquid ejecting apparatus and the operation of the bucket.   2. The dust suppression system according to claim 1, wherein a liquid ejecting direction of the nozzle is set to be inclined toward a lower surface side of the arm with respect to a length direction of the arm. The liquid ejecting apparatus has an air supply means for supplying compressed air to the nozzle,
The dust suppressing system according to claim 1, wherein the nozzle is configured to be able to eject a liquid in a mist shape by mixing the liquid with compressed air.   The dust suppression system according to any one of claims 1 to 3, wherein a surfactant is mixed in the liquid supplied by the supply means. A dust suppression method for suppressing generation of dust associated with a work of a hydraulic excavator by the dust suppression system according to any one of claims 1 to 4,
A method for suppressing dust, wherein when the soil is excavated and scooped up by the bucket, the liquid is ejected toward the opening of the bucket by the liquid ejecting apparatus.   The method for suppressing dust according to claim 5, wherein when the earth and sand scooped up by the bucket is loaded on a loading platform of a transport vehicle, the liquid ejecting device ejects liquid toward the loading platform.

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