JP7333517B2 - Air-conditioning system and air-conditioning method for cooling device of self-propelled work machine working in structure with dust source - Google Patents

Description

TECHNICAL FIELD The present invention relates to an air conditioning system and an air conditioning method for a cooling device of a self-propelled working machine that works inside a structure where a dust source exists.

Various air conditioning systems or methods for air conditioning in factories and tunnels are known.

For example, Patent Document 1 describes a factory equipped with various industrial machines installed on the floor side of the factory and cargo handling machines provided on the ceiling side of the factory. An air supply duct that is connected to the machine and guides conditioned air into the factory, an air outlet that is formed in this air supply duct and opens to the side at an intermediate height on the wall side of the factory, and the floor of the factory. A suction port that opens upward to suck air in the factory, a return air duct that guides the air in the factory sucked by the suction port to the air conditioner, and a heat medium in the heat exchanger in the air conditioner. discloses a factory air conditioning system comprising a heating unit and a cooling unit that supply heat for air conditioning by means of a heating unit and a cooling unit.

In Patent Document 2, a ventilation fan that introduces clean air through an air pipe to the vicinity of the face of a tunnel and a plurality of work machines that operate in a work area near the face are attached to each, and the operating state of the work machine is detected and the operating state is detected. and a plurality of transmitting devices for transmitting status signals including the type of work, a receiving device installed behind the work area in the tunnel and at a position where the status signals can be received, and a status signal received by the receiving device and a fan control device for controlling the air volume of the ventilation fan accordingly.

In Patent Document 3, when air-conditioning a heat load generation area in a large space, an air outlet or an air outlet chamber is appropriately moved from a fixed main duct to the heat load generation area via a flexible duct and a movable hanger. Disclosed is a method for air-conditioning a heat load generation area in a large space characterized by:

JP-A-4-257652 JP 2014-77236 A JP-A-53-146454 Japanese Patent Application Laid-Open No. 2003-3519

By the way, structures that form a semi-enclosed space such as buildings at garbage incinerators, industrial waste disposal sites; objects, structures, civil engineering structures, etc.), a large amount of dust spreads in a semi-enclosed space, and may adhere to self-propelled work machines such as hydraulic excavators, forklifts, and cranes. A cooling device for a self-propelled working machine is provided with an intake port for taking in air for cooling it. A filter or the like may be installed at the intake port, but the dust sucked in with the air taken in clogs the filter or accumulates in the cooling device. In such a state, the cooling efficiency of the cooling device is lowered, which may cause malfunction due to overheating (overheating) or damage the self-propelled working machine itself.

SUMMARY OF THE INVENTION An object of the present invention is to provide an air conditioning system and an air conditioning method for a cooling device of a self-propelled working machine that works inside a structure having a dust source.

The present invention includes the following aspects.
[1] A structure that forms a semi-enclosed space, a blower that draws in air from outside the structure, at least a part of a telescopic duct that allows the drawn air to flow, a suspension device, and a self-propelled work machine. Equipped with
The structure has a dust source,
The self-propelled working machine has a cooling device,
The suspension device comprises a rail fixed to the ceiling of the structure, a plurality of trolleys movable along the rail, and a suspension attached to each trolley,
The duct is attached at one end to the blower and at the other end so that the air sucked by the blower to the self-propelled working machine working in the structure can be sent to the cooling device, And the duct is suspended by each hanging tool, and when the self-propelled working machine travels in the structure, the trolley moves along the rail as it travels, and the duct expands and contracts.
An air-conditioning system for a cooling device of a self-propelled work machine working inside a structure with a dust source.

[2] Sucking in air outside the structure forming a semi-enclosed space,
Sending the sucked air through a duct to the cooling device of the self-propelled working machine,
A duct is suspended by a suspension fixture of a suspension device having a rail fixed to the ceiling of a structure, a plurality of trolleys movable along the rail, and a suspension fixture attached to each trolley. and when the self-propelled work machine travels in the structure, the trolley moves along the rail according to its travel, and the duct expands and contracts,
An air-conditioning method for a cooling device of a self-propelled working machine working inside a structure having a dust source.

According to the air-conditioning system and air-conditioning method of the present invention, it is possible to suppress damage to self-propelled working machines that work in structures where dust sources exist, and to lengthen the period until parts are repaired or replaced. The present invention can be preferably used particularly in a structure in which the semi-enclosed space is an acidic gas atmosphere such as hydrogen chloride gas.

FIG. 3 is a side view showing an example of the form of the suspension device, the duct, and the self-propelled working machine in the air conditioning system of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS It is a top view which shows an example of the air conditioning system of this invention. It is a figure which opens the cover of the rear side of a self-propelled working machine, and shows an example of the part of a cooling device.

The air conditioning system of the present invention comprises a structure 1, a blower 2, a duct 3, a suspension device 4, and a self-propelled working machine 5.

Examples of the self-propelled working machine 5 include a hydraulic excavator, a forklift, and a crane. The self-propelled work machine may be one that can be operated by a person getting into the driver's cab, or one that can be remotely operated by a remote controller. The self-propelled working machine includes various cooling devices including a radiator 21 for cooling engine cooling water, an oil cooler 22 for cooling hydraulic oil for hydraulic equipment, an aftercooler 23 for cooling compressed air supplied to the engine, and the like. A device 6 is installed. For example, in hydraulic excavators, the cooling device 6 is often arranged on the side surface of the vehicle body. Side doors, engine hoods, etc. are usually provided to cover the cooling system. An opening 7 for taking in air for cooling the cooling device is formed in the side door, the engine hood, etc. (see, for example, Patent Document 4). Moreover, the self-propelled working machine may be provided with an air chamber 14 in addition to the opening 7 in order to send the air sucked by the blower to the cooling device via the duct.

The structure 1 forms a semi-enclosed space and has a dust source. The semi-enclosed space has a width in which the self-propelled working machine can run. The dust source may be of any form. For example, a garbage incineration plant or an industrial waste treatment plant may be provided with a pit 12 or the like for temporarily storing waste such as garbage and industrial waste brought into the building. Then, the waste is thrown from the pit 12 into a waste processing device 16 such as a crusher, an incinerator, a press, etc. from a hopper 17 or the like. Work such as excavation and cutting is performed in a tunnel construction site, a utility tunnel construction site, a mine, or the like. Self-propelled work machines such as hydraulic excavators and cranes are used for work such as transportation of waste in buildings and work such as excavation and cutting in tunnels, and a large amount of dust is generated at that time. Within such structures, dust generated at the dust source spreads into the semi-enclosed space. Furthermore, since waste contains various substances, when waste is incinerated, dioxins; dust; acid gases such as sulfur oxides (SOx), nitrogen oxides (NOx) and hydrogen chloride; Hydrocarbons and the like are generated and may spread in semi-enclosed spaces. The structure may be an existing one or a new one.

The present invention can also be preferably applied when the semi-enclosed space in the structure is in an acidic gas atmosphere. Acid gases include hydrogen chloride gas, chlorine gas, hypochlorous acid gas, chlorous acid gas, chloric acid gas, perchloric acid gas, hydrobromic acid gas, hydrofluoric acid gas, sulfuric acid gas, sulfurous acid gas, Inorganic acid gases such as hydrogen sulfide gas, thiosulfuric acid gas, nitric acid gas, hydrogen cyanide gas and phosphoric acid gas; and organic acid gases such as formic acid gas, acetic acid gas, benzoic acid gas and benzenesulfonic acid gas.

The blower 2 is not particularly limited as long as it can suck in air outside the structure and send it out to the duct. The blower may be the same one installed for air conditioning in general structures.

The suspension device 4 includes, for example, a rail 8 fixed to the ceiling of the structure, a plurality of trolleys 9 movable along the rails, and a and a hanger 10. The rail is installed so that it can follow the self-propelled working machine in a predetermined travel range. A wire (tie) 11 may be stretched between adjacent trolleys or between the air chamber and the swivel in order to prevent excessive force from being applied to the duct as it expands and contracts.

One end of the duct is attached to the blower 2, and the other end is attached to the self-propelled working machine 5 that works inside the structure. The duct 3 is preferably detachably attached in order to facilitate replacement of the duct. At least a part of the duct 3 is telescopic. A duct is suspended by each suspension device 10 of the suspension device 4, and when the self-propelled working machine travels in the structure, the trolley moves along the rail as it travels, and the duct expands and contracts.

A swivel 13 is preferably provided between the portion of the duct 3a attached to the self-propelled working machine and the portion of the duct 3b suspended by the hanging tool. Since the swivel 13 allows the duct 3a attached to the self-propelled working machine and the duct 3b suspended from the hanger to rotate freely, the duct is less likely to be twisted. Although the swivel shown in FIG. 1 is generally box-shaped, it is not so limited.

The position at which the duct 3a is attached to the self-propelled working machine is not particularly limited as long as the air sucked by the blower can be sent to the cooling device 6. For example, it may be attached to the opening 7 for taking in air for cooling the cooling device, or it may be attached to the self-propelled working machine provided with an air chamber 14 . A damper 15 may be provided in the air chamber 14 to adjust the air volume to the cooling device through the duct 3c. Also, the air may be blown to a place other than the cooling device 6, for example, the driver's cab via the air chamber 14. FIG. In the system shown in FIG. 1, an air chamber 14 is installed on the cab roof.

The air sucked in from outside the structure contains less dust than the air inside the structure. Air sucked from outside the structure is sent to the cooling device 6 of the self-propelled working machine via the duct to cool the cooling device. When the air from the blower is sent around the cooling system, it becomes difficult for the air inside the structure to be taken in from the opening of the self-propelled work machine. It becomes difficult for dust to accumulate on cooling devices such as a radiator for cooling cooling water, an oil cooler for cooling hydraulic oil for hydraulic equipment, and an aftercooler for cooling compressed air supplied to the engine. As a result, the cooling efficiency of the cooling device does not decrease, malfunctions due to overheating (overheating) and damage to the self-propelled work machine itself are suppressed, and the period until parts are repaired or replaced is reduced. can be longer.

1: Structure 2: Blower 3: Duct 3a: Duct from swivel to air chamber 3b: Duct from hanger 3c: Duct from air chamber to cooling device 4: Suspension device 5: Self-propelled working device 6: Cooling device 21: Radiator 22: Oil cooler 23: Aftercooler 7: Opening 8: Rail 9: Trolley 10: Hanging tool 11: Tie 12: Pit 13: Swivel 14: Air chamber 15 : Dumper 16: Waste disposal device 17: Hopper 24: Remote control receiving antenna

Claims (2)

A structure forming a semi-enclosed space, a blower for sucking in air outside said structure, at least a part of a telescopic duct for flowing said sucked air, a hanging device, and a self-propelled working machine. Equipped with
The structure has a dust source,
The self -propelled working machine comprises a cooling device,
The hanging device comprises a rail fixed to the ceiling of the structure, a plurality of trolleys movable along the rail, and a hanging tool attached to each trolley,
One end of the duct is attached to the blower, and the other end is capable of sending the air sucked by the blower to the self - propelled working machine working in the structure to the cooling device. and
The duct is suspended by each of the slings, and when the self-propelled working machine travels in the structure , the trolley moves along the rail as it travels, and the duct expands and contracts.
An air-conditioning system for a cooling device of a self-propelled work machine working inside a structure with a dust source. Inhale the air outside the structure that forms the semi-enclosed space,
Sending the sucked air through a duct to a cooling device included in the self-propelled working machine,
The suspension device, wherein the duct has a rail fixed to the ceiling of the structure, a plurality of trolleys movable along the rail, and a hanging tool attached to each trolley. suspended by a fixture, and
When the self-propelled work machine travels in the structure, the trolley moves along the rail according to the travel, and the duct expands and contracts.
An air-conditioning method for a cooling device of a self-propelled working machine working inside a structure having a dust source.

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