Dedusting system for engineering machinery and engineering machinery

Abstract

The invention provides a dust removal system for engineering machinery, the dust removal system comprises a water spraying unit and an air spraying unit, the water spraying unit comprises a spray head mounted on a frame of the engineering machinery and a water pipe used for connecting the spray head with a water source; the air injection unit comprises an air pressurizing device mounted on a frame of the engineering machinery and an air duct communicated with the air pressurizing device, the air duct is provided with an outlet leading to the outside of the engineering machinery, the air duct and the water pipe are both arranged in the frame of the engineering machinery, and the nozzle and the air outlet are correspondingly arranged. The dust removal system disclosed by the invention cannot be damaged due to the operation of the engineering machinery, and can perform dust removal operation on an area needing dust removal in a targeted manner. The invention further relates to the engineering machinery with the dust removal system.

Description

Technical Field

[0001] The present disclosure relates to a construction machine, such as an excavator, and more particularly to a dust removal system for a construction machine and a construction machine including such a dust removal system. Background Art

[0002] Construction machinery is widely used in earthwork operations such as infrastructure construction and mining. Such earthwork operations generate a large amount of dust. As the country's environmental protection requirements increase, it is known that various dust removal or dust suppression equipment is used at construction sites, such as sprinkler trucks, fog cannons, etc. However, due to factors such as poor road conditions at the construction site and the long distance from the earthwork operation surface, it is difficult for existing dust removal or dust suppression equipment to achieve the effect of timely sprinkling or spraying to remove and / or suppress dust in a timely manner.

[0003] In order to timely remove and suppress dust when construction machinery such as excavators are performing earthwork operations, the following two technical solutions are known in the prior art:

[0004] Solution 1: Install a water tank on the excavator and pressurize it through a water pump so that high-pressure water can be delivered to the nozzles installed on the working tools (such as boom, dipper arm, bucket) of the excavator, thereby achieving water spraying and atomization for dust removal and dust suppression;

[0005] Option 2: Add a water tank to the rear of the excavator and use a mist cannon installed on the front maintenance platform of the excavator to perform spray dust removal.

[0006] In plan 1, in order to deliver high-pressure water to the nozzles installed on the working tools of the excavator, water pipes need to be installed on the working tools. However, when performing earthwork operations, flying stones or protrusions on the working surface may damage the water pipes on the working tools, causing failure of the dust removal equipment. Moreover, for excavators that can be equipped with multiple working tools, adding water pipes to them is also an important challenge to the pipeline layout of the excavator. At the same time, installing a single nozzle at different positions on the water pipe has a spray coverage range far less than that of a fog cannon, and the dust removal effect is limited.

[0007] In the second scheme, installing the water tank behind the counterweight of the excavator will increase the longitudinal bending moment load of the excavator frame, and the larger moment of inertia during the slewing operation also puts forward requirements for the strength of the water tank mounting bracket. Moreover, installing the fog cannon on the front maintenance platform will not only affect the operator's daily maintenance of the excavator, but also may cause damage to the fog cannon due to falling objects or dust caused by earthwork operations. Summary of the invention

[0008] The present disclosure aims to solve one or more problems in the above-mentioned prior art and proposes a novel dust removal system that can be used for engineering machinery.

[0009] Specifically, the present disclosure provides a dust removal system for engineering machinery, the dust removal system comprising:

[0010] A water spray unit, the water spray unit comprising a spray head mounted on a frame of the engineering machinery and a water pipe for connecting the spray head to a water source;

[0011] The jet unit includes an air pressurizing device mounted on a frame of the engineering machine and an air duct connected to the air pressurizing device, wherein the air duct has an air outlet leading to the outside of the engineering machine.

[0012] Wherein, the air duct and the water pipe are both arranged in the frame of the engineering machinery, and the nozzle is arranged corresponding to the air outlet.

[0013] The dust removal system disclosed in the present invention is arranged on the frame of the engineering machinery instead of being located on the working machine. Such a dust removal system is not easily damaged and can flexibly move with the engineering machinery itself when the engineering machinery is carrying out earthwork or relocation, thereby achieving dust removal and dust suppression by timely spraying water or spraying on the dust.

[0014] According to a preferred embodiment, the air jet unit further comprises a closing plate disposed at an air outlet of the air duct, wherein the closing plate is operable to move between an open position for opening the air duct and a closed position for closing the air duct.

[0015] According to a preferred embodiment, the air jet unit includes a plurality of air ducts having air outlets facing the front of the engineering machine and / or a plurality of air ducts having air outlets facing the rear of the engineering machine.

[0016] According to a preferred embodiment, the air outlet of each air duct is equipped with a closing plate, and these closing plates can be operated independently of each other so as to selectively open or close a part of the air outlet according to needs.

[0017] According to a preferred embodiment, the air pressurizing device comprises a blower.

[0018] According to a preferred embodiment, the water pipe is arranged in association with the air duct in a frame of the construction machine.

[0019] According to a preferred embodiment, the water source includes a water tank and a water pump connecting the water tank and a water pipe. Preferably, the water tank is arranged on the counterweight of the engineering machinery.

[0020] According to a preferred embodiment, the dust removal system includes a controller and a switch valve arranged in the water pipe, and the switch valve is communicatively connected to the controller.

[0021] According to a preferred embodiment, the dust removal system further comprises a dust sensor, and the dust sensor is communicatively connected with the controller.

[0022] On the other hand, the present disclosure provides a construction machine, which includes the dust removal system as described above.

[0023] In particular, the construction machine is an excavator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The details and advantages of the present disclosure can be understood by reading the following description given with reference to the accompanying drawings and in conjunction with the specific embodiments. In the accompanying drawings:

[0025] Figure 1 is a schematic side view of a construction machine according to a preferred embodiment of the present disclosure;

[0026] Figure 2 is a schematic top view of a construction machine according to a preferred embodiment of the present disclosure; and

[0027] Figure 3 A system flow chart of a dust removal system according to a preferred embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0028] The technical solution of the present disclosure is further specifically described below through embodiments and in conjunction with the accompanying drawings. The description is intended to explain the overall concept of the present disclosure and should not be construed as limiting the present disclosure.

[0029] The dust removal system disclosed in the present invention can be arranged on the frame or body of the engineering machinery, and can be flexibly operated according to the current operating status of the engineering machinery (i.e., traveling or working) so as to realize the dust removal and dust suppression functions in front and behind the engineering machinery. It should be pointed out here that the frame or body of the engineering machinery refers to the main frame of the engineering machinery, which may include the chassis frame and the possibly necessary external enclosures and other parts, but does not include the working tools (such as booms, dipper arms, buckets, etc.) and their actuating mechanisms (such as lifting cylinders, etc.) and other active parts that must be moved when the engineering machinery is working.

[0030] The dust removal system disclosed in the present invention may include a water spray unit and an air jet unit, wherein the water spray unit may include a nozzle installed on the frame of the engineering machinery and a water pipe for connecting the nozzle to a water source, and the air jet unit may include an air pressurizing device (or referred to as an "air supply device") installed on the frame of the engineering machinery and an air duct connected to the air pressurizing device, wherein the air duct may be provided in the frame of the engineering machinery and may have an outlet to the outside of the frame of the engineering machinery, and the nozzle may be arranged in association with the outlet of the air duct.

[0031] The following will refer to the attached Figure 1-3 The dust removal system of the present disclosure is described by taking an excavator as an example. The excavator may include a frame or body 110, a traveling device 120 and a work tool 130 connected to the frame or body and capable of movement. The frame or body 110 may be formed by a crossbeam and a longitudinal beam constituting a frame and an outer enclosure surrounding the crossbeam and the longitudinal beam, and may have a cab 111 at the front and a counterweight 112 at the rear. The traveling device 120 may be formed by a crawler chain. The work tool 130 may include a boom 131 and a bucket 132.

[0032] according to Figure 1-2 In the preferred embodiment shown in , the water source of the water spraying unit can be constituted by a water tank 1, which can be advantageously arranged on the counterweight 112 of the excavator, and can be provided with a water inlet pipe 2 and a water outlet pipe 3. The water inlet pipe 2 can be connected to a water supply source, such as a municipal water supply network, for filling water into the water tank 1, and can be provided with a cover for closing the water tank 1 when the water tank 1 is full. The water outlet pipe 3 can be connected to the input port of a water pump 4, so that the water in the water tank 1 can be pressurized by the water pump 4 to form high-pressure water, and then supplied to the spray head 7 via a water pipe 5.

[0033] In this case, the water pump 4 can advantageously be connected to a hydraulic motor 14 or an electric motor 15 (see Figure 3 ) so as to be driven by the latter. The hydraulic motor 14 or the electric motor 15 can be controlled by the controller 13 (see Figure 3 ) control. The controller 13 may be disposed in the cab 111 of the excavator so as to facilitate the operator of the excavator to operate.

[0034] Of course, as an alternative to the vehicle-mounted water tank 1 shown in the figure, the water source of the water spray unit can also be an external water source located outside the excavator. For example, water can be supplied to the water spray unit through a water tank installed on a trailer or other movable machine (the water tank can be equipped with a water pump or without a water pump), or pressurized water can be supplied to the water spray unit through a water supply hose directly connected to the water supply network.

[0035] According to the present disclosure, the water spray unit of the dust removal system may include a water pipe 5 intended to be connected to a water source and a spray head 7 disposed at the end of the water pipe 5. The water pipe 5 may be made of, for example, a pressure-resistant plastic pipe, such as a PVC pipe, and may be arranged along the frame of the excavator, such as a longitudinal beam or a cross beam of the excavator chassis. The spray head 7 may be arranged on the frame of the excavator, in particular, mounted on the front and / or rear panels of the excavator body, and directed toward the front and / or rear of the excavator.

[0036] Preferably, the water spray unit may include a plurality of water pipes 5 or water pipe branches, and a spray head 7 may be connected to the end of each water pipe or water pipe branch. In particular, the water pipes or water pipe branches may be constructed or arranged to be located only within the frame of the excavator, in other words, the water pipes or water pipe branches have no part extending from the frame or body of the excavator.

[0037] It is also preferred that a switch valve 6 is provided in each water pipe 5 or water pipe branch. The switch valve 6 can be connected to the controller 13 for opening and closing as required, thereby connecting or disconnecting the connection between the corresponding nozzle 7 and the water source. In this way, the effect of making the nozzles 7 spray water together or individually can be achieved by controlling some or all of the switch valves 6.

[0038] Here, it should be noted that the nozzle 7 can be a conventional nozzle that can form multiple water jets or water mist using pressurized water. In the case where the water spray unit includes multiple nozzles 7, these nozzles 7 can have different configurations, for example, some nozzles 7 can be configured to spray water jets, while other nozzles 7 can be configured to spray water mist. Alternatively, each nozzle 7 can be configured to spray pressurized water in different forms (such as water jets and water mist) so as to be able to switch between the working states of water spraying and spraying.

[0039] In addition, it should be pointed out that Figure 1 As can be seen in the figure, the water spray unit and in particular its spray head 7 can be arranged in the lower part of the excavator frame, for example, in the part below the excavator cab, so as to facilitate timely suppression of dust formation. Advantageously, the water pipe and in particular the spray head of the water spray unit can be arranged in association with the air jet unit and in particular the air outlet, which will be further explained below.

[0040] Still see Figure 1-2 The jet unit of the dust removal system of the present disclosure may also include a blower 10 as an air pressurizing device or air supply device and an air duct 11 connected to the output of the blower 10, wherein the air duct 11 is advantageously arranged in the frame or body of the excavator, for example, extending along the longitudinal beams and cross beams of the frame or body, and does not extend beyond the frame or body. Specifically, the air duct 11 may be formed by a pipe or conduit laid along the frame structure (e.g., longitudinal beams and / or cross beams) of the excavator, and may even be directly formed by the longitudinal beams or cross beams when the longitudinal beams or cross beams of the excavator frame are formed by tubular beams. The free end opening of the pipe or conduit, that is, the outlet of the air duct 11, may be oriented toward or lead to the outside of the body of the excavator.

[0041] The blower 10 can also be advantageously mounted on the frame of an excavator, for example behind the cab of the excavator and in the space between the engine and the cab mounting. Figure 1 As can be seen in the figure, the blower 10 can be provided with an air intake duct 9 facing upward and extending outside the body of the excavator, and an air intake filter 8 can be provided at the entrance of the air intake duct 9 (i.e., the free end opening above it) to filter impurities or foreign matter that may be present in the air to be sucked into the blower 10.

[0042] Of course, the air pressurizing device or air supply device of the jet unit in the dust removal system of the present disclosure is not limited to the specific embodiments described and shown above. For example, it is conceivable to use a micro-mist cannon or other device that can generate or supply an air flow (especially a flow of pressurized air) as an air pressurizing device or air supply device.

[0043] according to Figure 1-2 In the preferred embodiment shown in FIG. 1 , the jet unit may include five air ducts 11 or air duct branches, each of which has a respective outlet (hereinafter referred to as an “air outlet”) 12. Specifically, as can be seen from Figure 2 As can be seen in FIG. 1 , the five air ducts 11 or air duct branches may include three air ducts 11 or air duct branches having air outlets 12 toward the front of the excavator, and two air ducts 11 or air duct branches having air outlets 12 toward the rear of the excavator.

[0044] Of course, the arrangement of the air duct in the dust removal system of the present disclosure is not limited to the specific embodiment shown in the figure. For example, a greater or lesser number of air ducts 11 or air duct branches with air outlets 12 may be arranged. An air duct or air duct branch leading to the side of the excavator body may also be arranged.

[0045] In addition, in the embodiment shown in the figure, each air duct 11 and especially its air outlet 12 are arranged in the lower part of the excavator body and are at approximately the same height. However, it is also conceivable to arrange each air duct 11 and especially at least a part of each air outlet 12 at different heights from each other.

[0046] Here, it should be noted that, as mentioned above, the air outlet 12 of the air duct 11 of the jet unit can be arranged corresponding to the nozzle 7 of the water spray unit. In particular, each nozzle 7 can be arranged at the air outlet 12, that is, an air outlet 12 is provided for each nozzle 7, so that the water jet or water mist sprayed from the nozzle 7 can be guided or transported to the earthwork working surface of the excavator by means of the air flow sprayed from the air outlet 12, thereby suppressing the generation of dust.

[0047] In this case, preferably, the air duct 11 of the jet unit and the water pipe 5 or water pipe branch of the water jet unit can be arranged in the frame of the excavator in association. For example, the air duct 11 and the water pipe 5 or water pipe branch can be configured to extend in parallel in the frame of the excavator, for example, both extend along the longitudinal beam and / or cross beam of the excavator frame, and can be the same in number.

[0048] Preferably, the jet unit may further include a closing plate (not shown in the figure) for closing the air outlet 12. The closing plate may be in the form of a covering member such as a flip plate or a telescopic or shutter-type baffle, and may be respectively arranged at each air outlet 12. In particular, these closing plates may be operated independently of each other, so as to allow the operator to open or close part of the air outlet 12 as required.

[0049] Advantageously, the closing plate can be an automatically openable and closable closing plate with a motorized actuating device so as to be controlled by the controller 13, or it can be a simple shielding member that can be opened or closed manually by an operator.

[0050] See also Figure 3 The dust removal system of the present disclosure may further include a dust sensor 16. The dust sensor 16 may be connected to the controller 13 in communication so that the operator can timely understand the dust condition of the working area and automatically or manually start the water spray unit and / or the air spray unit to perform dust removal operations.

[0051] Preferably, the dust sensor 16 can be arranged at the air outlet 12 of the jet unit, for example, a dust sensor 16 is arranged at each air outlet 12. Of course, as an alternative or additional solution, multiple dust sensors 16 can also be arranged at other parts of the excavator, so as to timely and comprehensively understand the dust situation in the working area.

[0052] Industrial Applicability

[0053] The dust removal system disclosed in the present invention can be supplied with water by an external water source or a vehicle-mounted water source of the excavator, and the water spray unit can be controlled according to the water supply situation (whether the water source is sufficient) and the dust situation in the working area, so that all the nozzles 7 can work together or one or some of the nozzles 7 can work alone, and the nozzles 7 can also be switched between the working states of water spraying and mist spraying.

[0054] Even if the water source is the onboard water tank 1 mounted on the counterweight of the excavator, the dust removal system of the present disclosure will not significantly affect the normal operation (working or traveling) of the excavator.

[0055] If the frame of the excavator itself has a tubular structure, the air duct of the jet unit in the dust removal system of the present disclosure can be formed by the tubular structure itself, wherein the air outlet can be formed by punching holes in the tubular structure. Such a solution does not require additional components or cumbersome installation operations, and can significantly save parts costs and assembly costs.

[0056] The dust removal system of the present disclosure is located entirely within the frame or body of the excavator, with no components that protrude significantly from the frame or body, and no components that must be disposed on movable parts such as work tools. This greatly reduces the risk of damage or failure of components of the dust removal system, thereby significantly reducing maintenance work and maintenance costs.

[0057] The dust removal system of the present disclosure allows the air outlet of the jet unit to be selectively opened and closed, thereby being able to operate flexibly according to the operating conditions of the excavator and the dust conditions in the working area, thereby enabling targeted dust removal and dust suppression.

[0058] like Figure 3 As shown, water can be injected into a water tank 1 serving as a water source through a water inlet pipe 2, and the water in the water tank 1 can be supplied to each nozzle 7 via a water pipe 5 through a water pump 4 driven by a hydraulic motor 14 or an electric motor 15, so as to spray water flow or water mist to the surroundings of the excavator, especially the working area of ​​the excavator, thereby achieving the effect of dust removal and dust suppression.

[0059] During the water spraying process, part of the switch valve 6 can be opened or closed so as to spray water flow or water mist in a targeted manner to a specific or required area.

[0060] While the water spray unit is operating, or independently of the operation of the water spray unit, the jet unit, that is, the blower 10 can be started to spray air flow toward a predetermined area and / or guide the water jet or water mist sprayed from the spray head 7.

[0061] When the excavator is working on site, only the air outlet 12 of the air duct facing the front of the excavator can be opened; and when the excavator is moving, the air outlet 12 of the air duct facing the rear of the excavator can be opened. In this way, the effect of spraying air flow and water jet or water mist in a targeted manner to the area requiring dust removal can be achieved.

[0062] Finally, the controller 13 can also automatically start the dust removal system to remove dust according to the dust detection signal fed back by the dust sensor 16. During the dust removal process, the dust removal system can selectively remove dust from the working area with serious dust. For example, all or part of the closing plate can be operated according to the detection signal of the dust sensor 16, so as to selectively open or close part of the air outlet 12 as needed, so as to blow air only to part of the multiple nozzles 7.

[0063] Although the overall concept of the present disclosure has been described in conjunction with the embodiments, those skilled in the art will appreciate that various changes and modifications may be made to the embodiments without departing from the principles and spirit of the overall concept of the present disclosure.

Claims

1. A dust removal system for construction machinery, include: A water spray unit, the water spray unit comprising a spray head (7) mounted on a frame of the engineering machinery and a water pipe (5) for connecting the spray head to a water source; An air jet unit, the air jet unit comprising an air pressurizing device mounted on a frame of an engineering machine and an air duct (11) connected to the air pressurizing device, the air duct (11) having an air outlet (12) leading to the outside of the engineering machine; Wherein, the air duct and the water pipe are both arranged in the frame of the engineering machinery, and the nozzle is arranged corresponding to the air outlet.

2. The dust removal system according to claim 1, in, The air injection unit further comprises a closing plate arranged at the air outlet (12) of the air duct (11), and the closing plate can be operated to move between an open position for opening the air duct and a closed position for closing the air duct.

3. The dust removal system according to claim 2, in, The jet unit comprises a plurality of air ducts (11) having air outlets (12) facing the front of the engineering machine and / or a plurality of air ducts having air outlets facing the rear of the engineering machine.

4. The dust removal system according to claim 3, in, The air outlet (12) of each air duct (11) is equipped with a closing plate, and these closing plates can be operated independently of each other so as to selectively open or close a part of the air outlet according to needs.

5. The dust removal system according to claim 1, in, The water pipe (5) is arranged in association with the air duct (11) in the frame of the engineering machinery.

6. The dust removal system according to claim 1, in, The water source comprises a water tank (1) and a water pump (4) connecting the water tank and a water pipe (5).

7. The dust removal system according to claim 6, in, The dust removal system comprises a controller (13) and a switch valve (6) arranged in the water pipe (5), wherein the switch valve is communicatively connected with the controller.

8. The dust removal system according to claim 7, in, The dust removal system also includes a dust sensor (16), which is communicatively connected to the controller (13).

9. A construction machine comprising the dust removal system according to any one of claims 1 to 8.

10. The construction machine according to claim 9, in, The engineering machinery is an excavator.

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