JP3819995B2 - Foam dustproof device for excavating machinery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foam dustproof device used by being mounted on an excavating machine for excavating / filling earth and sand. More specifically, when dust is scattered by work with a drilling machine such as a backhoe, an excavating machine that prevents the dust from scattering by generating foam with the foam dust control device mounted on the excavating machine and covering the location where the dust is generated with the foam. The present invention relates to a foam dustproof device.
[0002]
[Prior art]
The excavation and loading of the ground is performed by excavating machines such as a power shovel and a backhoe. During these operations, if the ground and earth and sand are dry, earth and sand with small particles will scatter in the surrounding air. Dust scattering is not desirable from the viewpoint of the health of the operator and operator of the excavating machine, and it is also desirable to minimize the possibility of complaints from the neighborhood when working in an urban area.
[0003]
Conventionally, for this reason, water is sprayed on the work target surface, but it cannot be sufficiently sprayed at a site where there is no water. Therefore, for example, in order to suppress the dust generated from the conveyor as much as possible, there has been proposed one that covers the earth and sand on the conveyor with foam (Japanese Patent Laid-Open No. 51-5773). However, since the excavating machine performs excavation of the ground and embankment / loading work of earth and sand, etc., even if a fixed foaming device is installed, the place of work always moves, so the dust generating part is appropriately It is difficult to cover and is not appropriate.
[0004]
[Problems to be solved by the invention]
The present invention has been made based on the technical background as described above, and achieves the following object.
[0005]
An object of the present invention is to provide a foam dustproof device for an excavating machine that can cover a work target surface such as excavation of the ground and loading of earth and sand with foam.
[0006]
Another object of the present invention is to provide a foam dustproof device for an excavating machine in which the operator of the excavating machine can control the release and stop of the foam from the cab during operations such as excavation of the ground and loading of earth and sand.
[0007]
Still another object of the present invention is to provide a foaming dustproof device for excavating machine that has high mobility and can quickly follow even if a work position such as excavation of the ground or loading of earth and sand moves.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the present invention employs the following means.
[0009]
The foam dustproof device for excavating machine of the present invention 1
In an excavating machine equipped with a boom for excavating the ground,
A foamer provided on the boom for generating foam by mixing a solution containing compressed air and a surfactant in order to inject foam onto a work target surface of the excavating machine;
A pump unit for supplying compressed air and the solution to the foamer;
An air hose for connecting the foamer and the pump unit to supply compressed air;
A solution hose for connecting the foamer and the pump unit to supply the solution;
In a foam dustproof device for a drilling machine comprising pump unit control means arranged at a driver's seat of the drilling machine to control the pump unit to control at least supply / stop of compressed air and the solution to the foamer ,
The pump unit control means is a manual switch for opening and closing a power source of a first electric motor that drives a compression pump for compressing air and a second electric motor that drives a pump for pressurizing the solution. Features. This manual switch is specifically may be a manual switch which is provided in the cab.
The pump unit is a concept including compressed air, a pump for supplying the solution, a compressor, and power for driving them. Furthermore, the pump unit control means is a concept including means for controlling the flow rates of the air and the solution by controlling the rotation speeds of the first electric motor and the second electric motor with known rotation speed control means.
The foam dustproof device for excavating machine of the present invention 2
In an excavating machine equipped with a boom for excavating the ground,
A foamer provided on the boom for generating foam by mixing a solution containing compressed air and a surfactant in order to inject foam onto a work target surface of the excavating machine;
A pump unit for supplying compressed air and the solution to the foamer;
An air hose for connecting the foamer and the pump unit to supply compressed air;
A solution hose for connecting the foamer and the pump unit to supply the solution;
In a foam dustproof device for a drilling machine comprising pump unit control means arranged at a driver's seat of the drilling machine to control the pump unit to control at least supply / stop of compressed air and the solution to the foamer ,
The foamer includes a mixing and agitation unit in which a large number of holes are formed and the air and the solution are mixed and a rectification unit including a plurality of pipes through which the mixed air and the solution are passed.
[0010]
The said work object surface mainly means the ground surface of the excavating machine, such as excavation, grooving, embankment, loading into a transport vehicle, and the surface of earth and sand. The pump unit is mobile and effective when mounted on the excavating machine. In addition, the pump unit may be mounted on a swivel provided with a driver's cab such as a backhoe, or may be installed on the ground close to another excavation machine or excavation site instead of the excavating machine.
[0011]
The excavating machine is a concept including a so-called excavating machine called a civil excavator such as a power shovel, a backhoe, a drag line, a clam shell, etc., provided with a boom or an arm for ground excavation, sediment loading and the like. It is.
[0012]
The foamer includes a mixing and agitation unit in which a large number of holes are formed to mix the air and the solution and a rectifying unit including a plurality of pipes through which the mixed air and the solution are passed. As long as the foamer is a foamer having a known structure, it can be applied as long as the foamer is uniformly mixed and foamed with a solution containing pressurized air and a surfactant.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below. FIG. 1 is a diagram showing an embodiment of the present invention, and is a diagram showing a situation where the ground is excavated with a backhoe. The backhoe 1 is known to be suitable for excavation in a place lower than the position of the machine. The backhoe 1 is of a crawler type, and a vehicle body 3 is mounted on a crawler 2 which is an endless track crawler, and can be self-propelled with an engine.
[0014]
A turntable 4 is mounted on the vehicle body 3, and the turntable 4 can turn around a vertical axis. A driver's seat 5 for an operator is arranged on the turntable 4. The swivel base 4 is provided with a base end of a boom 6 so as to be swingable, and a tip end thereof can be raised and lowered up and down. Further, the base end of the arm 8 is swingably provided at the tip of the boom 6.
[0015]
The arm 8 is driven to swing by an arm cylinder 9. A bucket 10 for excavating the ground is swingably provided at the tip of the arm 8. The bucket 10 is driven to swing by a bucket cylinder 11. Since the above structural functions are known as a backhoe, a detailed description of the structural functions is omitted. The backhoe 1 excavates the ground G with the bucket 10 by an operator's operation to create a foundation, a groove, and the like. When excavating the ground G, if the ground G is dry, dust will rise.
[0016]
Therefore, during excavation work and before excavation, if necessary, the foam generator 16 of the foam dustproof device 15 (see FIG. 3) generates and discharges foam, that is, a large amount of foam, for the purpose of dust prevention. Cover the ground G. The operator controls the generation and stoppage of foam as needed by manual switches 30 and 31 arranged in the driver's seat 5. The foam generator 16 is mechanically fixed to the lower surface of the arm 8. The foam generator 16 is supplied with a solution that is an aqueous solution of compressed air and a surfactant from a pump unit 20 mounted on the swivel base 4 by an air hose 17 and a solution hose 18.
[0017]
When the ground G covered with foam is excavated, since the ground G is covered with foam, the amount of dust scattered is small. After excavating the ground G with the bucket 10, foam is sprayed onto the earth and sand in the excavated bucket 10 to cover the earth and sand with foam. In this state, when the earth and sand are loaded on the loading platform 14 of the dump truck, the dust that is scattered during transportation can be minimized by covering the earth with foam as shown in FIG. 2 even after the loading.
[0018]
[Foam dustproof device 15]
FIG. 3 shows a circuit for foam generation of the foam dustproof device 15. The pump unit 20 includes a compressor 21 that compresses and supplies air. The compressor 21 is rotationally driven by an electric motor 22. The air compressed by the compressor 21 is supplied to the foam generator 16 by the air hose 17. A check valve 23 is interposed between the compressor 21 and the foam generator 16 to prevent backflow from the foam generator 16.
[0019]
The pump unit 20 includes a pump 25 that pressurizes and supplies a solution obtained by diluting a surfactant with water. The pump 25 is rotationally driven by an electric motor 26. The pump 25 pressurizes the solution stored in the solution tank 28 in the pump unit 20 and supplies it to the foam generator 16 through the solution hose 18. A check valve 27 is interposed between the pump 25 and the foam generator 16 to prevent back flow of the solution.
[0020]
ON / OFF control of the electric motors 22 and 26 is started and stopped by manual switches 30 and 31 arranged in the driver's seat 5. The AC power supply 32 is supplied from a power supply unit (not shown) installed in the vicinity of the backhoe 1. The AC power supply 32 may be mounted on or built in the backhoe 1. In order to start foaming from the foaming device 16, the manual switch 30 is turned on, the electric motor 22 is started, the compressor 21 is driven, and compressed air is supplied to the foaming device 16. At the same time or later, the manual switch 31 is turned on, the electric motor 26 is started, the pump 25 is driven, and the solution is supplied to the foaming device 16.
[0021]
[Foaming device 16]
4 is an external view showing the external appearance of the foamer, FIG. 5 is a cross-sectional view taken along line VV in FIG. 4, and FIG. 6 is a cross-sectional view taken along line VI-VI in FIG. It is sectional drawing. The main body 40 of the foamer 16 has a cylindrical shape. Four L-shaped fixing brackets 41 for fixing to the arm 16 are fixed to the outer periphery of the main body 40 by welding. The fixing bracket 41 is fixed to the arm 16 with a bolt to fix the foamer 16 in a predetermined position.
[0022]
A mixing supply pipe 43 is connected and fixed to the rear end face 42 of the main body 40 with screws, and communicates with the internal space of the main body 40. The mixing supply pipe 43 is a pipe for supplying the foamed device 16 with a mixture of compressed air and a solution. A check valve 23 is connected to the mixing supply pipe 43, and a joint 45 and an air hose 17 are connected to the check valve 23, and pressurized air from the compression pump 25 is supplied to the mixing supply pipe 43. The A solution supply pipe 46 is branched and connected to the mixing supply pipe 43.
[0023]
A check valve 27 is connected to the solution supply pipe 46. Further, the solution hose 18 is connected to the check valve 27 via a joint 48, and the solution pressurized from the pump 25 is supplied to the solution supply pipe 46. 46. On the other hand, a foam discharge pipe 51 is screwed and fixed to the front end face 50 of the main body 40. The foam discharge pipe 51 has a circular root portion, but its tip is deformed in a circular shape, and the discharge port 52 inside thereof has a generally rectangular cross section and expands toward the front to form a fan shape.
[0024]
FIG. 5 is a cross-sectional view of the main body 40, and the main body 40 includes a first mixing and stirring unit 55, a rectifying unit 56, and a second mixing and stirring unit 58. The first mixing and stirring unit 55 and the second mixing and stirring unit 58 are formed by randomly packing sheets made of synthetic resin elastomer in which a large number of holes made of synthetic resin are formed. The solution and the compressed air become turbulent and uniformly mixed while passing through a large number of holes formed in the sheet.
[0025]
The solution and compressed air supplied from the mixing and mixing supply pipe 43 are first supplied to the first mixing and agitation unit 55 to become a turbulent flow, and the solution and the compressed air are uniformly mixed. The rectifying unit 56 is made from a large number of pipes made of synthetic resin. The mixed solution and compressed air are once rectified by this pipe 57.
[0026]
After the solution and the compressed air are rectified, the solution and the compressed air are supplied to the second mixing and stirring unit 58 in order to uniformly mix the solution and the compressed air again. The second mixing and stirring unit 58 is made of the same material and structure as the second mixing and stirring unit 55, and further mixes the solution and compressed air uniformly. By this mixing, the sufficiently mixed solution and compressed air are continuously discharged from the discharge port 52 of the foam discharge pipe 51 as foam.
[0027]
(Operation of Embodiment 1)
Next, the operation of the foam dustproof device for excavating machine of the first embodiment will be described. When the operator of the driver's seat 5 of the backhoe 1 determines that foam is necessary, the operator operates the manual switch 31 disposed in the driver's seat 5 to activate the electric motor 22. The electric motor 22 is activated to drive the compressor 21 and supply compressed air to the foamer 16 via the air hose 17 and the check valve 23.
[0028]
At the same time or later, the manual switch 30 is turned ON, the electric motor 26 is activated, and the pump 25 is driven to pressurize the solution. The pressurized solution is supplied to the foamer 16 via the solution hose 18 and the check valve 44. Foam is continuously discharged from the foam discharge pipe 51 of the foamer 16 according to the above principle. Foam is discharged from the discharge port 52 of the foam discharge pipe 51 so as to spread, and the foam covers the work target surface widely. In order to stop the foam discharge from the foaming device 16, the manual switch 30 and the manual switch 31 are turned OFF to stop the discharge.
[0029]
(Other embodiments)
Although the foam dustproof device 15 of the said embodiment was applied to the backhoe 1, it is applicable also to things, such as a power shovel, a drag line, a clam shell, etc., provided with the boom or arm of an excavation machine. . Moreover, although the said foaming device 16 was provided in the arm 8, if it is a digging machine, it may be fixed to the boom 6. Therefore, in the present invention, the boom and the arm are not distinguished as long as they are operated by an operator and movable for excavation.
[0030]
Although the pump unit 20 is mounted on the swivel 4 of the backhoe 1, it is not always necessary to mount the pump unit 20 on an excavating machine, such as mounting on a mobile carriage or installation on the ground. The foamer 16 includes the first mixing and stirring unit 55, the rectifying unit 56, and the second mixing and stirring unit 58, but the second mixing and stirring unit 58 is not necessarily required.
[0031]
The first mixing and agitation unit 55 and the second mixing and agitation unit 58 are sheet-like synthetic resin elastomers having a large number of holes, but other materials may be used as long as they have a myriad of holes such as a nonwoven fabric. It may be a material. Furthermore, although the rectification | straightening part 56 was made with the pipe, what was integrally comprised by the beehive shape may be sufficient. Furthermore, the foaming device 16 is not limited to this structure, and may be another known foaming device as long as air and a solution are mixed and foamed.
[0032]
The manual switches 30 and 31 of the above embodiment start and stop foaming when the motors 22 and 26 are turned on and off. However, the manual switches 30 and 31 control the supply amount by controlling the rotation speed of the motors 22 and 26. The known control may also be adopted. Further, on / off of the supply of compressed air and solution may be controlled by opening / closing an electromagnetic valve instead of turning on / off the electric motors 22, 26.
[0033]
【The invention's effect】
As described above in detail, the foam dustproof device for an excavating machine according to the present invention has an effect that the operator can accurately inject and cover the foam on the target surface such as excavation and loading work required directly from the driver's seat. Therefore, foam can be generated without waste and dust can be effectively prevented. In addition, there is a soundproofing effect depending on the mode of use.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention, and is a diagram showing a situation where a ground is excavated with a backhoe.
FIG. 2 is a diagram illustrating a state in which foam is discharged during a loading operation with a backhoe.
FIG. 3 shows a circuit for foam generation of a foam dustproof device.
FIG. 4 is an external view showing an external appearance of a foamer.
5 is a cross-sectional view taken along line VV in FIG. 4. FIG.
6 is a cross-sectional view taken along line VI-VI in FIG. 5;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Backhoe 3 ... Car body 5 ... Driver's seat 6 ... Boom 8 ... Arm 16 ... Foam generator 20 ... Pump unit 30, 31 ... Manual switch 51 ... Foam discharge pipe 55 ... 1st mixing stirring part 56 ... Rectification part 57 ... 1st 2 mixing stirrer

Claims (4)

In an excavating machine equipped with a boom for excavating the ground,
A foamer provided on the boom for generating foam by mixing a solution containing compressed air and a surfactant in order to inject foam onto a work target surface of the excavating machine;
A pump unit for supplying compressed air and the solution to the foamer;
An air hose for connecting the foamer and the pump unit to supply compressed air;
A solution hose for connecting the foamer and the pump unit to supply the solution;
In a foam dustproof device for a drilling machine comprising pump unit control means arranged at a driver's seat of the drilling machine to control the pump unit to control at least supply / stop of compressed air and the solution to the foamer ,
The pump unit control means is a manual switch for opening and closing a power source of a first electric motor that drives a compression pump for compressing air and a second electric motor that drives a pump for pressurizing the solution. A foam dustproof device for excavating machines. In an excavating machine equipped with a boom for excavating the ground,
A foamer provided on the boom for generating foam by mixing a solution containing compressed air and a surfactant in order to inject foam onto a work target surface of the excavating machine;
A pump unit for supplying compressed air and the solution to the foamer;
An air hose for connecting the foamer and the pump unit to supply compressed air;
A solution hose for connecting the foamer and the pump unit to supply the solution;
In a foam dustproof device for a drilling machine comprising pump unit control means arranged at a driver's seat of the drilling machine to control the pump unit to control at least supply / stop of compressed air and the solution to the foamer ,
The foaming device includes a mixing and stirring unit in which a large number of holes are formed to mix the air and the solution and a rectifying unit including a plurality of pipes through which the mixed air and the solution pass. Foam dustproof device for machinery. In the foam dust-proof device for excavating machines according to claim 1 or 2 ,
The foam unit for excavating machines, wherein the pump unit is mounted on the excavating machine.   The foam dustproof device for excavating machines according to claim 1 or 2, wherein the excavating machine is a backhoe.

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