Cleaning device for mixing drum of premixed concrete transport vehicle

Abstract

The mixing drum cleaning device for a premixed concrete truck according to the present invention comprises: a telescopic multi-stage arm (10), the base end of which is attached to the periphery of a hopper (4) so as to be selectively positioned inside or outside a mixing drum (2); a pull wire (13) extending parallel to the multi-stage arm (10); a winch mechanism (12) that expands or contracts the multi-stage arm (10) by loosening or pulling the pull wire (13); and a washing water nozzle (20) which is provided at the tip of the multi-stage arm (10), moves together with the multi-stage arm (10), and sprays washing water forward, laterally, and rearward.

Description

Technical Field

[0001] The present invention relates to a mixing drum cleaning device for a ready-mixed concrete transport truck, and more particularly to a mixing drum cleaning device for a ready-mixed concrete transport truck with a novel structure, which has a simple structure, can efficiently and cleanly clean the inside of the mixing drum of the ready-mixed concrete transport truck, and is convenient for storage and storage. Background Art

[0002] The raw concrete used for pouring concrete on construction sites is usually mixed with aggregates, cement, water and other materials in a predetermined mix ratio in a ready-mixed concrete manufacturing equipment, and then loaded into the mixing drum of a ready-mixed concrete transport truck. The mixing drum is rotated to stir the ready-mixed concrete while transporting it to the site, and then the ready-mixed concrete is poured on site.

[0003] In such a ready-mixed concrete transport truck, raw concrete including cement hardens rapidly over time. If the concrete hardens while adhering to the mixing drum, hopper or chute of the ready-mixed concrete transport truck, the ready-mixed concrete transport truck may not be able to operate normally. Therefore, after each on-site pouring of raw concrete, the raw concrete adhering to the inside of the mixing drum, the hopper, the chute or the body outside the mixing drum should be cleaned and removed.

[0004] However, in order to clean the inside of the mixing drum of the ready-mixed concrete transport truck, the following method has been mainly used in the past: filling the mixing drum with cleaning water, rotating the mixing drum while removing the raw concrete attached to the spiral blades installed in a spiral shape on the inner wall of the mixing drum or the inner peripheral surface of the mixing drum, and spraying the cleaning water through a nozzle from the hopper side as the inlet. However, as mentioned above, it is not easy to make the concrete attached to the inner wall of the mixing drum or the spiral blades fall off simply by filling the mixing drum with cleaning water and rotating it, and even if the nozzle is inserted from the hopper side to spray pressurized cleaning water, the spray pressure of such cleaning water cannot reach the raw concrete remaining on the back side of the spiral blade or the inner wall of the mixing drum adjacent to the above-mentioned back side when observed from the inlet of the mixing drum, so the concrete still remains on the inner wall of the mixing drum or the back side of the spiral blade and hardens. As a result, the function of the mixing drum that needs to be loaded with concrete materials and discharged quickly after matching is impaired, so there is the inconvenience that the driver has to enter the mixing drum and use a tool to hit the hardened concrete attached to the inner wall of the mixing drum or the spiral blade to remove it, and in this process, the mixing drum or the spiral blade may be damaged, thereby shortening the life of the ready-mixed concrete transport truck. Summary of the invention

[0005] Technical issues

[0006] The present invention is proposed in view of the maintenance problems such as cleaning of the mixing drum of the existing ready-mixed concrete transport truck as mentioned above. The purpose of the present invention is to provide a cleaning device for the mixing drum of the ready-mixed concrete transport truck with the following novel structure, that is, the device has a simple structure, can efficiently and cleanly clean the inside of the mixing drum of the ready-mixed concrete transport truck, and is also easy to store and keep.

[0007] Technical Solution

[0008] According to one feature of the present invention, a mixing drum cleaning device for a ready-mixed concrete transport vehicle is provided, wherein the mixing drum 2 is carried or towed by the ready-mixed concrete transport vehicle 1, and comprises: a hopper 4 for feeding ready-mixed concrete prepared in a ready-mixed concrete factory; a spiral blade 5 arranged in a spiral shape around the inner wall; and a chute 6 for discharging the mixed ready-mixed concrete, wherein the mixing drum 2 is rotatable, and the mixing drum cleaning device for the ready-mixed concrete transport vehicle is characterized in that it comprises: a multi-stage arm 10, a base end of which is mounted on the periphery of the hopper 4 so that it is selectively positioned inside or outside the mixing drum 2 and can be extended and retracted; a traction line 13 extending parallel to the multi-stage arm 10; a winch mechanism 12 for extending or retracting the multi-stage arm 10 by loosening or pulling the traction line 13; and a cleaning water nozzle 20, which is arranged at the front end of the multi-stage arm 10 and moves therewith to spray cleaning water toward the front, side and rear.

[0009] According to another feature of the present invention, a mixing drum cleaning device for a ready-mixed concrete transport truck is provided, characterized in that the multi-stage arm 10 is composed of a plurality of watertight telescopic tubes, at the end of which the cleaning water nozzle 20 is directly combined, or a separate cleaning water pipeline 16 is provided inside or outside the multi-stage arm 10, and the cleaning water nozzle 20 is combined at the end of the cleaning water pipeline 16.

[0010] According to another feature of the present invention, a mixing drum cleaning device for a ready-mixed concrete transport truck is provided, characterized in that a rotating shaft 11 installed on the periphery of the hopper 4 is provided at the base end of the above-mentioned multi-stage arm 10, and the position of the multi-stage arm 10 is adjusted between a first position extending downward in a state of being retracted to the outside of the hopper 4 and a second position extending to the interior of the mixing drum 2 through the opening 8 of the above-mentioned hopper 4, with the above-mentioned rotating shaft 11 as the center.

[0011] Effects of the Invention

[0012] According to the present invention, a vehicle-mounted integrated ready-mixed concrete mixing drum cleaning device is provided, that is, a base end portion of a retractable multi-stage arm 10 is installed around the hopper 4 of the mixing drum 2 of the ready-mixed concrete transport vehicle 1, the multi-stage arm 10 is selectively positioned inside or outside the mixing drum 2, and a cleaning water nozzle 20 for spraying cleaning water forward or backward is provided at the front end of the multi-stage arm 10. Thus, as a separate device, the mixing drum of the ready-mixed concrete transport vehicle can be cleaned at any time when necessary without moving it to a ready-mixed concrete manufacturing plant or construction site equipped with a mixing drum cleaning device, so that the raw concrete remaining in the mixing drum 2 can be quickly cleaned to prevent it from sticking, thereby maintaining the cleanliness and durability of the mixing drum 2 of the ready-mixed concrete transport vehicle 1. Furthermore, when not cleaning, the multi-stage arm 10 of the cleaning device can be withdrawn to the outside of the mixing drum 2, thereby preventing interference when the ready-mixed concrete is put into the mixing drum 2 through the hopper 4 in the ready-mixed concrete factory, or when the mixing drum is moved while rotating, or when the ready-mixed concrete is discharged on site through the chute 6. When cleaning, the position of the multi-stage arm 10 is adjusted and it is put into the mixing drum 2 for cleaning. By arranging the cleaning device in an integrated manner on the ready-mixed concrete transport vehicle, the convenience of cleaning is improved, and when operations such as putting in or injecting ready-mixed concrete are performed, the cleaning device is withdrawn to the outside of the mixing drum 2, so as not to interfere with the putting in or injecting of ready-mixed concrete on site, etc., and at the same time, such concrete is prevented from adhering to the cleaning nozzle of the cleaning device, etc., which may cause poor operation of the cleaning device. The cleaning device can be used for a long time without any trouble, thereby improving the durability of the cleaning device.

[0013] Furthermore, when cleaning, the multi-stage arm 10 is extended and cleaning water is sprayed inside the mixing drum 2. The cleaning water is sprayed not only toward the front and the sides but also toward the rear. When the cleaning water is sprayed toward the front, the water pressure of the cleaning water is used to cause concrete remaining on the back of the spiral blade 5 or in the dead corner around it that the cleaning water cannot reach to fall off and be discharged together with the cleaning water through the opening 8, so that the inside of the mixing drum 2 can be cleaned, thereby preventing the function of the ready-mixed concrete transport vehicle from being damaged or the durability from being reduced.

[0014] Furthermore, the multi-stage arm 10 is composed of a plurality of watertight, telescopic tube bodies, and a cleaning water nozzle 20 is combined at the front end of the multi-stage arm 10, or a cleaning water pipeline 16 made of a hose or the like which is separately arranged inside or outside the multi-stage arm 10 and telescopic along the length direction of the multi-stage arm 10 is combined with the cleaning water nozzle 20. Thus, the cleaning water pipeline 16 can be telescoped, stretched or pulled and moved with the telescope of the multi-stage arm 10 with a simple structure, and while moving back and forth inside the mixing drum 2, cleaning water can be sprayed onto the front and rear surfaces of the spiral blades 5 at any position, thereby achieving effective and clean cleaning.

[0015] Furthermore, the present invention provides a mixing drum cleaning device for a ready-mixed concrete transport vehicle, which has the following compact and simple structure: a rotating shaft 11 mounted on the periphery of the hopper 4 is provided at the base end of the multi-stage arm 10, and the position of the multi-stage arm 10 is adjusted between a first position in which the multi-stage arm 10 extends downward in a state of being retracted to the outside of the hopper 4 and a second position in which the multi-stage arm 10 extends into the interior of the mixing drum 2 through the opening 8 of the hopper 4, with the rotating shaft 11 as the center. In order to avoid interference with other components during loading or moving of ready-mixed concrete and during the operation of discharging ready-mixed concrete on site, the multi-stage arm 10 extends downward from the periphery of the hopper 4 in a retracted state, and when cleaning, extends into the interior of the mixing drum 2 through the opening 8 of the hopper 4, thereby being compact and easy to store and store. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of an embodiment of the present invention.

[0017] Figure 2 It is a cross-sectional view of the mixing drum in the use state of the above embodiment.

[0018] Figure 3 It is a stereoscopic view of the multi-stage arm of the above embodiment. DETAILED DESCRIPTION

[0019] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 is a front view of an embodiment of the present invention, Figure 2 This is a cross-sectional view of the mixing drum in use. Figure 3 As shown in the figure, according to the present invention, a mixing drum 2 is rotatably carried in a ready-mixed concrete transport vehicle 1, and the mixing drum 2 includes: a hopper 4 for feeding ready-mixed concrete prepared in a ready-mixed concrete plant; a spiral blade 5, which is spirally arranged around the inner wall; and a chute 6 for discharging the mixed ready-mixed concrete.

[0020] A bracket 9 is installed around the hopper 4. A rotating shaft 11 is coupled to the bracket 9. The rotating shaft 11 is rotatably coupled to the base end of a multi-stage arm 10. The multi-stage arm 10 is composed of a plurality of retractable tubular bodies such as a multi-stage boom. In addition, a winch mechanism 12 supported by a support plate 17 is provided on the outer side of a first arm 10a provided at the base end of the multi-stage arm 10. The winch mechanism 12 is composed of a motor, a reducer, a pulley or a drum, etc., and can extend or retract the multi-stage arm 10 by winding or unwinding a traction line 13. The traction line 13 is tied to the frontmost arm 10b through a ring 14 provided on the outer peripheral surface of the multi-stage arm 10 in an aligned manner. The multi-stage arm 10 can be extended by its own weight and retracted by the pulling of the traction line 13. However, depending on the structure of the winch mechanism 12 or the setting form of the traction line 13, the extension and retraction of the multi-stage arm 10 can be performed by adjusting the pushing or pulling direction of the traction line 13.

[0021] A cleaning water nozzle 20 is provided at the front end of the multi-stage arm 10. The cleaning water nozzle 20 is formed with a nozzle hole 21 for spraying cleaning water toward the front, side and rear. The front, side and rear refer to the direction in which the multi-stage arm 10 is extended as the front and the direction in which it is contracted as the rear, including the inclined front or the inclined rear. As described above, in the present invention, the cleaning water nozzle 20 can spray cleaning water in all directions including the front, side and rear of the surrounding part. Therefore, when cleaning water is sprayed toward the inside of the mixing drum from the vicinity of the inlet 7 of the hopper 4 facing the inlet of the mixing drum 2, the concrete remaining on the back of the spiral blade 5 or the surrounding dead corner where the cleaning water cannot reach is dropped by the nozzle hole 21 behind the cleaning water nozzle 20 and the water pressure of the cleaning water is used, and is discharged together with the cleaning water through the opening 8, so that the inside of the mixing drum 2 can be cleaned, thereby preventing the function of the ready-mixed concrete transport vehicle from being damaged or the durability from being reduced.

[0022] Furthermore, according to the present invention, a plurality of retractable tubes are watertightly coupled to the multistage arm 10 by means of a sealing ring not shown, so that the multistage arm 10 itself can function as a retractable cleaning water supply pipe. However, in the illustrated embodiment, a cleaning water pipeline 16 made of a retractable hose is built into the multistage arm 10 composed of a plurality of tubes, and the cleaning water nozzle 20 is coupled to the front end of the cleaning water pipeline 16. Thus, as the multistage arm 10 is extended and retracted, the cleaning water pipeline 16 built into the multistage arm 10 is also extended and retracted. On the other hand, in contrast, the cleaning water pipeline 16 is not extended and retracted along the length direction, but is only made of a flexible hose or pipe. As the multistage arm 10 is extended and retracted, the cleaning water pipeline 16 can also be pulled or stretched and moved forward and backward. The cleaning water pipeline 16 is connected to a cleaning water supply device 22 and a cleaning water supply pipeline 24 arranged outside the mixing drum 2. The cleaning water supply device 22 can be carried on the ready-mixed concrete transport vehicle 1 or arranged separately.

[0023] Furthermore, according to the present invention, at the base end of the multistage arm 10, a bracket 9 is installed around the hopper 4, and the base end of the multistage arm 10 is provided on the bracket 9 in a manner that it can rotate through the rotating shaft 11. With the rotating shaft 11 as the center, the position of the multistage arm 10 is adjusted between a first position in which the multistage arm 10 extends downward in a state of being retracted to the outside of the hopper 4 and a second position in which the multistage arm 10 extends to the inside of the mixing drum 2 through the opening 8 of the hopper 4. Moreover, at the second position in which the multistage arm 10 extends to the inside of the mixing drum 2, the multistage arm 10 can be extended by the operation of the winch mechanism 12 or its own weight, and can penetrate into the inside of the mixing drum 2 together with the cleaning water nozzle 20, and the inside of the mixing drum 2 can be cleaned by spraying cleaning water.

[0024] According to the present invention as described above, as a separate device, the mixing drum of the ready-mixed concrete transport vehicle can be cleaned at any time when necessary without moving it to the ready-mixed concrete manufacturing plant or construction site equipped with the mixing drum cleaning device, so that the raw concrete remaining in the mixing drum 2 can be quickly cleaned to prevent it from sticking, thereby maintaining the cleanliness and durability of the mixing drum 2 of the ready-mixed concrete transport vehicle 1. In addition, when not cleaning, the multi-stage arm 10 of the cleaning device can be withdrawn to the outside of the mixing drum 2, thereby preventing interference in the process of feeding the ready-mixed concrete into the mixing drum 2 through the hopper 4 in the ready-mixed concrete plant, or moving while rotating the mixing drum, or discharging the ready-mixed concrete on site through the chute 6, thereby preventing poor operation of the cleaning device caused by concrete adhering to the cleaning nozzle of the cleaning device, etc., thereby improving the durability of the cleaning device.

Claims

1. A mixing drum cleaning device for a ready-mixed concrete transport vehicle, wherein the mixing drum (2) is carried or towed by the ready-mixed concrete transport vehicle (1), comprising: A hopper (4) for feeding ready-mixed concrete prepared in a ready-mixed concrete plant; The spiral blade (5) is arranged in a spiral shape along the inner wall; and the chute (6) is used to discharge the mixed ready-mixed concrete. The mixing drum (2) is rotatable. The mixing drum cleaning device of the ready-mixed concrete transport vehicle is characterized in that: include: A multi-stage arm (10), the base end of which is mounted on the periphery of the hopper (4) so ​​that it can be selectively positioned inside or outside the mixing drum (2) and can be extended and retracted; A traction line (13) extending parallel to the multi-stage arm (10); A winch mechanism (12) for extending or retracting the multi-stage arm (10) by loosening or pulling the traction line (13); and The cleaning water nozzle (20) is arranged at the front end of the multi-stage arm (10) and moves together with the multi-stage arm (10), spraying cleaning water toward the front, side and rear. A rotating shaft (11) mounted on the periphery of the hopper (4) is provided at the base end of the multi-stage arm (10). With the rotating shaft (11) as the center, the position of the multi-stage arm (10) is adjusted between a first position in which the multi-stage arm (10) is extended downward in a state of being retracted to the outside of the hopper (4) and a second position in which the multi-stage arm (10) is extended to the inside of the mixing drum (2) through the opening 8 of the hopper (4).

2. The mixing drum cleaning device of the ready-mixed concrete transport vehicle according to claim 1, characterized in that: The multi-stage arm (10) is composed of a plurality of watertight and telescopic tube bodies, and the cleaning water nozzle (20) is directly coupled to the end of the multi-stage arm, or a separate cleaning water pipeline (16) is provided inside or outside the multi-stage arm (10), and the cleaning water nozzle (20) is coupled to the end of the cleaning water pipeline (16).

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