Mixing drum cleaning device for ready-mix concrete transport vehicles

Abstract

The mixing drum cleaning device of the ready-mixed concrete transport vehicle of the present application includes: a multi-stage arm (10) having a base end portion mounted to a peripheral portion of a hopper (4) so as to be selectively positioned inside or outside a mixing drum (2) and being capable of being extended and retracted; a traction line (13) extending in parallel with 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) provided at a front end of the multi-stage arm (10) and moving together with the multi-stage arm (10) to spray cleaning water toward the front, the side, and the rear.

Description

Technical Field

[0001] This invention relates to a cleaning device for the mixing drum of a ready-mixed concrete transport vehicle, and more specifically, to a novel cleaning device for the mixing drum of a ready-mixed concrete transport vehicle, which has a simple structure, can efficiently and cleanly clean the inside of the mixing drum of the ready-mixed concrete transport vehicle, and is also easy to store and preserve. Background Technology

[0002] Raw concrete used for pouring concrete on construction sites is usually prepared by mixing aggregates, cement, water and other materials in a pre-mixed concrete manufacturing equipment according to a predetermined mix ratio, then loading it into the mixing drum of a pre-mixed concrete transport truck. The mixing drum is rotated to mix the pre-mixed concrete while transporting it to the site, where the pre-mixed concrete is then poured.

[0003] In these ready-mixed concrete transport trucks, the raw concrete, including cement, hardens rapidly over time. If the concrete hardens while still attached to the mixing drum, hopper, or chute of the ready-mixed concrete transport truck, the truck will not function properly. Therefore, after each on-site dumping of raw concrete, the raw concrete attached to the inside of the mixing drum, hopper, chute, or the outside of the mixing drum should be cleaned and removed.

[0004] However, the conventional method for cleaning the inside of the mixing drum of a ready-mixed concrete truck is as follows: filling the drum with cleaning water, rotating the drum to remove raw concrete adhering to the spiral blades mounted on the inner wall or circumference of the drum, and spraying cleaning water through nozzles from the hopper side (the loading port). However, as mentioned above, simply filling the drum with cleaning water and rotating it is insufficient to remove the concrete adhering to the inner wall or spiral blades. Even when pressurized cleaning water is sprayed from the nozzles inserted from the hopper side, the spray pressure is insufficient to reach the raw concrete remaining on the back of the spiral blades or adjacent to the back of the inner wall of the drum. Therefore, the concrete remains on the inner wall or the back of the spiral blades and hardens. This impairs the function of the mixing drum, which requires the rapid loading and unloading of concrete. Consequently, the driver must enter the drum and use tools to strike and remove the hardened concrete adhering to the inner wall or spiral blades. During this process, the drum or spiral blades may be damaged, thus shortening the lifespan of the ready-mixed concrete truck. Summary of the Invention

[0005] Technical issues

[0006] This invention addresses the cleaning and maintenance problems of the mixing drum of existing ready-mixed concrete transport vehicles as described above. The purpose of this invention is to provide a novel cleaning device for the mixing drum of ready-mixed concrete transport vehicles, which has a simple structure, can efficiently and cleanly clean the inside of the mixing drum of the ready-mixed concrete transport vehicle, and is also easy to store and preserve.

[0007] Technical solution

[0008] According to a feature of the present invention, a cleaning device for the mixing drum of a ready-mixed concrete transport vehicle is provided, wherein the mixing drum 2 is carried or pulled by the ready-mixed concrete transport vehicle 1, and includes: a hopper 4 for feeding ready-mixed concrete prepared in a ready-mixed concrete plant; spiral blades 5 arranged spirally around the inner wall; and a chute 6 for discharging the mixed ready-mixed concrete. The mixing drum 2 is rotatable. The cleaning device for the mixing drum of the ready-mixed concrete transport vehicle is characterized by including: a multi-stage arm 10, the base end of which is mounted around the hopper 4, such that it is selectively positioned inside or outside the mixing drum 2 and is telescopic; 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 releasing or pulling the traction line 13; and a cleaning water nozzle 20 disposed at the front end of the multi-stage arm 10 and moving therewith, spraying cleaning water in the forward, side and rear directions.

[0009] According to another feature of the present invention, a cleaning device for the mixing drum of a ready-mixed concrete transport vehicle is provided, characterized in that the multi-stage arm 10 is composed of multiple watertight telescopic tubes, with the cleaning water nozzles 20 directly connected to its ends, or a separate cleaning water pipeline 16 is provided inside or outside the multi-stage arm 10, with the cleaning water nozzles 20 connected to the ends of the cleaning water pipeline 16.

[0010] According to another feature of the present invention, a cleaning device for the mixing drum of a ready-mixed concrete transport vehicle is provided, characterized in that a rotating shaft 11 is provided at the base end of the multi-stage arm 10 and installed around the hopper 4, 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 into the interior of the mixing drum 2 through the opening 8 of the hopper 4, with the rotating shaft 11 as the center.

[0011] The effects of the invention

[0012] According to the present invention, a vehicle-mounted integrated premixed concrete mixing drum cleaning device is provided, wherein a retractable multi-stage arm 10 is installed around the hopper 4 of the mixing drum 2 of the premixed 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 standalone device, the mixing drum of the premixed concrete transport vehicle can be cleaned whenever necessary without moving it to a premixed concrete manufacturing plant or construction site equipped with a mixing drum cleaning device. Therefore, residual raw concrete inside the mixing drum 2 can be quickly cleaned, preventing it from sticking together, thereby maintaining the cleanliness and durability of the mixing drum 2 of the premixed concrete transport vehicle 1. Furthermore, when not cleaning, the multi-stage arm 10 of the cleaning device can be retracted to the outside of the mixing drum 2, thus preventing interference during the process of feeding pre-mixed concrete into the mixing drum 2 via the hopper 4 at the ready-mixed concrete plant, moving it while the mixing drum is rotating, or discharging pre-mixed concrete on-site via the chute 6. When cleaning, the position of the multi-stage arm 10 is adjusted and it is inserted into the mixing drum 2 for cleaning. By installing the cleaning device in an integrated manner on the ready-mixed concrete transport vehicle, the convenience of cleaning is improved. When performing operations such as feeding or injecting pre-mixed concrete, the cleaning device can be retracted to the outside of the mixing drum 2, thus not interfering with the feeding or on-site injection of pre-mixed concrete, and preventing concrete from adhering to the cleaning nozzles of the cleaning device, which could lead to malfunction of the cleaning device. The cleaning device can be used without failure for a long time, thus improving the durability of the cleaning device.

[0013] Furthermore, during cleaning, the multi-stage arm 10 extends and sprays cleaning water inside the mixing drum 2. The cleaning water is sprayed not only forward and to the sides, but also backward. When the cleaning water is sprayed forward, the water pressure of the cleaning water causes the concrete remaining on the back of the spiral blades 5 or in the dead corners around them that the cleaning water cannot reach to fall off and be discharged together with the cleaning water through the opening 8. This cleans the inside of the mixing drum 2, thereby preventing damage to the function or a decrease in the durability of the ready-mixed concrete transport vehicle.

[0014] Furthermore, the aforementioned multi-stage arm 10 is composed of multiple watertight telescopic tubes. By attaching a cleaning water nozzle 20 to the front end of the aforementioned multi-stage arm 10, or attaching a cleaning water nozzle 20 to the end of a cleaning water pipeline 16 made of a flexible hose or the like, which is separately located inside or outside the aforementioned multi-stage arm 10 and extends and retracts along the length of the multi-stage arm 10, the cleaning water pipeline 16 can be extended, stretched, pulled, and moved with the extension and retraction of the multi-stage arm 10 in a simple structure. While moving back and forth inside the mixing drum 2, cleaning water is 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 cleaning device for the mixing drum of a ready-mixed concrete transport vehicle, which has the following compact and simple structure: a rotating shaft 11 is provided at the base end of the multi-stage arm 10 and mounted around the hopper 4. The position of the multi-stage arm 10, centered on the rotating shaft 11, is adjusted between a first position extending downwards in a retracted state to the outside of the hopper 4 and a second position extending into the interior of the mixing drum 2 through the opening 8 of the hopper 4. To avoid interference with other components during the loading or movement of ready-mixed concrete and during on-site discharge of ready-mixed concrete, the multi-stage arm 10 extends downwards from the periphery of the hopper 4 in a retracted state, and during cleaning, extends into the interior of the mixing drum 2 through the opening 8 of the hopper 4, thus making it compact and easy to store and preserve. Attached Figure Description

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

[0017] Figure 2 This is a cross-sectional view of the stirring tank in use according to the above embodiment.

[0018] Figure 3 This is a perspective view of the multi-stage arm in the above embodiment. Detailed Implementation

[0019] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Figure 1 This is a front view of an embodiment of the present invention. Figure 2 This is a cross-sectional view of the mixing tank in use. Figure 3 This is a perspective view of a multi-stage boom. 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. The mixing drum 2 includes: a hopper 4 for feeding ready-mixed concrete prepared at a ready-mixed concrete plant; spiral blades 5 arranged spirally 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 attached to the bracket 9. The base end of a multi-stage arm 10 is rotatably attached to the rotating shaft 11. The multi-stage arm 10 is composed of multiple telescopic tubular bodies, such as multi-stage booms. Furthermore, in the multi-stage arm 10, a winch mechanism 12, supported by a support plate 17, is provided on the outer side of the first arm 10a located at the base end. The winch mechanism 12 is composed of a motor, reducer, pulleys, or rollers, and can extend or retract the multi-stage arm 10 by winding or unwinding the traction line 13. The traction line 13 is tied to the foremost arm 10b by loops 14 aligned on the outer circumference of the multi-stage arm 10. The multi-stage arm 10 can extend under its own weight and retract by the pull of the traction line 13. However, depending on the structure of the winch mechanism 12 or the arrangement of the traction line 13, the extension and retraction of the multi-stage arm 10 can be achieved 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 has nozzle holes 21 for spraying cleaning water in the forward, side, and rear directions. "Forward," "side," and "rear" refer to the direction in which the multi-stage arm 10 extends (forward) and the direction in which it retracts (rear), including inclined forward or inclined rear directions. As described above, in this invention, the cleaning water nozzle 20 can spray cleaning water in all directions, including forward, side, and rear, of the surrounding area. Therefore, when cleaning water is sprayed forward from near the inlet 7 of the hopper 4 facing the inlet of the mixing drum 2 towards the inside of the mixing drum, the water pressure of the cleaning water through the nozzle holes 21 behind the cleaning water nozzle 20 causes concrete remaining on the back side of the spiral blades 5 or in the dead corners around them, which the cleaning water cannot reach, to fall off and be discharged together with the cleaning water through the opening 8. This cleans the inside of the mixing drum 2, thereby preventing damage to the function or a decrease in the durability of the ready-mixed concrete transport vehicle.

[0022] Furthermore, according to the present invention, multiple telescopic tubes are watertightly connected to the multi-stage arm 10 by means of a sealing ring (not shown), so that the multi-stage arm 10 itself can function as a telescopic cleaning water supply pipe. However, in the illustrated embodiment, a cleaning water pipeline 16 made of a telescopic flexible hose is built inside the multi-stage arm 10, which is composed of multiple tubes, and the cleaning water nozzle 20 is connected to the front end of the cleaning water pipeline 16. Thus, as the multi-stage arm 10 extends and retracts, the cleaning water pipeline 16 built inside the multi-stage arm 10 also extends and retracts accordingly. On the other hand, conversely, the cleaning water pipeline 16 does not extend and retract along its length, but is only made of a flexible hose or tube. As the multi-stage arm 10 extends and retracts, the cleaning water pipeline 16 can also be pulled or stretched and moved back and forth. The cleaning water pipeline 16 is connected to a cleaning water supply device 22 and a cleaning water supply pipeline 24 provided outside the mixing drum 2. The cleaning water supply device 22 can be carried on the ready-mixed concrete transport vehicle 1 or be set up separately.

[0023] Furthermore, according to the present invention, a support 9 is installed around the hopper 4 at the base end of the multi-stage arm 10, and the base end of the multi-stage arm 10 is rotatable via the rotating shaft 11. Centered on the rotating shaft 11, the position of the multi-stage arm 10 is adjustable between a first position extending downwards in a state retracted to the outside of the hopper 4 and a second position extending into the interior of the mixing drum 2 through the opening 8 of the hopper 4. Moreover, in the second position where the multi-stage arm 10 extends into the interior of the mixing drum 2, the multi-stage arm 10 can be extended by the operation of the winch mechanism 12 or by its own weight, and can penetrate deep into the interior of the mixing drum 2 together with the cleaning water nozzle 20, thereby cleaning the interior of the mixing drum 2 by spraying cleaning water.

[0024] According to the present invention as described above, as a standalone 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. Therefore, residual raw concrete inside the mixing drum 2 can be quickly cleaned, preventing it from sticking together, thus 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 retracted to the outside of the mixing drum 2, preventing interference during the process of feeding ready-mixed concrete into the mixing drum 2 through the hopper 4 at the ready-mixed concrete plant, moving the mixing drum while it rotates, or discharging ready-mixed concrete on-site through the chute 6. This prevents concrete from adhering to the cleaning nozzles of the cleaning device, thus preventing malfunctions of the cleaning device and improving its durability.

Claims

1. A mixing drum cleaning device for a ready-mix concrete truck, said mixing drum (2) being carried or towed by said ready-mix concrete truck (1), comprising: The hopper (4) is used to feed ready-mixed concrete prepared in a ready-mixed concrete plant; the spiral blades (5) are arranged spirally around the inner wall; and the chute (6) is used to discharge the mixed ready-mixed concrete. The mixing drum (2) of the above-mentioned ready-mixed concrete transport vehicle is characterized by the following features: include: The multi-stage arm (10) is mounted at its base around the hopper (4) so ​​that it can be selectively positioned inside or outside the mixing drum (2) and can extend and retract. The traction line (13) extends parallel to the aforementioned multi-stage arm (10); The winch mechanism (12) extends or retracts the multi-stage boom (10) by releasing or pulling the aforementioned traction line (13); and The cleaning water nozzle (20) is located at the front end of the multi-stage arm (10) and moves with it, spraying cleaning water in the front, side and rear directions. A rotating shaft (11) is provided at the base end of the multi-stage arm (10) and installed around the hopper (4). The position of the multi-stage arm (10) is adjusted between a first position in which it extends downward in a state of being retracted to the outside of the hopper (4) and a second position in which it extends into the interior of the mixing drum (2) through the opening (8) of the hopper (4). The multi-stage arm (10) is composed of multiple watertight telescopic tubes, with the cleaning water nozzle (20) directly connected to its end, or a separate cleaning water line (16) is provided inside or outside the multi-stage arm (10), with the cleaning water nozzle (20) connected to the end of the cleaning water line (16).

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