JP6462299B2 - Mixer drum cooling device - Google Patents

Description

  The present invention relates to a mixer drum cooling device for cooling a mixer drum mounted on a mixer vehicle.

  The mixer truck includes a mixer drum capable of loading so-called ready-mixed concrete such as ready-mixed concrete as contents, and transports ready-mixed concrete to a setting site.

  When transporting ready-mixed concrete by a mixer truck, the temperature of the mixer drum may increase due to outside air or sunlight. As a means for preventing such a temperature rise of the mixer drum, a mixer vehicle including a mixer drum cooling device for cooling the mixer drum is known (for example, Patent Document 1).

  Patent Document 1 discloses a mixer drum cooling device including a cooling pan for storing a cooling medium in which a lower portion of the mixer drum is immersed below the mixer drum.

JP 2006-111150 A

  In the mixer drum cooling device disclosed in Patent Document 1, it is necessary to store a large amount of cooling medium in order to immerse the lower part of the mixer drum.

  Further, during the traveling of the mixer vehicle, the vehicle may shake due to curve traveling, braking, or the like. For this reason, in the mixer drum cooling device disclosed in Patent Document 1, the accumulated cooling medium may be spilled from the cooling pan due to the shaking of the vehicle and scattered outside the mixer truck.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a mixer drum cooling device that can suppress scattering of a cooling medium while the mixer vehicle is traveling.

The present invention is a mixer drum cooling device for cooling a mixer drum mounted on a mixer vehicle, wherein the injection unit is provided below the mixer drum and injects a cooling medium from below to the mixer drum, and is provided below the mixer drum. A storage unit that stores the cooling medium injected by the injection unit onto the mixer drum, a pump that guides the cooling medium stored in the storage unit to the injection unit, and a controller that controls the pump. When any one of the brake operation of the mixer vehicle, the steering angle of the steering wheel greater than a predetermined angle, and the acceleration greater than the predetermined angle of the mixer vehicle is detected, the controller supplies the coolant from the injection unit. The injection is stopped .

  According to the present invention, the mixer drum can be cooled by injecting the cooling medium from below the mixer drum by the injection unit. Also, since the cooling medium is injected to cool the mixer drum, it is not necessary to store a large amount of cooling medium in which the mixer drum is immersed in the storage unit that stores the injected cooling medium. For this reason, it is suppressed that the cooling medium stored in the storage unit is scattered due to shaking during traveling. Further, by spraying the cooling medium from below the mixer drum, the scattering of the cooling medium on the mixer drum is also suppressed. Therefore, scattering of the cooling medium to the outside during traveling of the mixer truck can be suppressed.

It is a side view of the mixer truck carrying the mixer drum cooling device concerning the embodiment of the present invention. It is an enlarged view of the mixer drum cooling device concerning the embodiment of the present invention, and is a sectional view along the front-rear direction passing through the center of the mixer truck in the left-right direction. It is sectional drawing of the mixer drum cooling device which concerns on embodiment of this invention, and is sectional drawing along the AA in FIG. It is sectional drawing which shows the modification of the injection part in the mixer drum cooling device which concerns on embodiment of this invention. It is sectional drawing which shows the modification of the storage part in the mixer drum cooling device which concerns on embodiment of this invention.

  Hereinafter, a mixer drum cooling apparatus 100 according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1 to FIG. 3, the coolant that is stored or injected is represented by a two-dot chain line.

  First, with reference to FIG. 1, the overall configuration of a mixer truck 10 equipped with a mixer drum cooling device 100 will be described.

  The mixer truck 10 conveys so-called ready-mixed concrete such as ready-mixed concrete (hereinafter referred to as “ready-mixed”) by a mixer drum 2 mounted on a gantry 1.

  As shown in FIG. 1, the mixer drum 2 is a container that is rotatably mounted on the gantry 1. Further, the mixer drum 2 is mounted such that the rotation axis thereof faces the front-rear direction of the mixer wheel 10 (left-right direction in FIG. 1). The mixer drum 2 is mounted so as to be inclined forward and backward so as to gradually increase toward the rear part (right direction in FIG. 1) of the gantry 1.

  The mixer drum 2 is formed with an opening at the rear end thereof, and raw material is charged and discharged from the opening. Above the opening of the mixer drum 2, a hopper 3 is provided for charging the raw concrete.

  The mixer drum 2 is driven using a traveling engine (not shown) mounted on the mixer vehicle 10 as a power source, and is forward / reversely increased / decreased by a drum driving device 4 mounted on the gantry 1. The drum driving device 4 controls the rotation of the mixer drum 2 according to a command from a controller (not shown). When the mixer drum 2 is rotated in the forward direction by the drum driving device 4, the raw control in the mixer drum 2 is agitated, and when the mixer drum 2 is operated in the reverse rotation, the raw control in the mixer drum 2 is discharged to the outside.

  Next, the mixer drum cooling device 100 for cooling the mixer drum 2 will be described.

  As shown in FIGS. 1 and 2, the mixer drum cooling apparatus 100 is provided below the mixer drum 2 and injects water as a cooling medium from below into the mixer drum 2, and is provided below the mixer drum 2. The storage part 30 which stores the water which the part 20 injected with respect to the mixer drum 2 and the pump 40 which guides the water stored by the storage part 30 to the injection part 20 are provided.

  As shown in FIG. 2, the injection unit 20 includes a hollow cylindrical tube 21 extending in the front-rear direction of the mixer vehicle 10 and a plurality of injection ports 23 formed in the cylindrical tube 21 so as to face the lower portion of the mixer drum 2. And having.

  The cylindrical tube 21 extends in the front-rear direction of the mixer truck 10 and is bent so as to follow the outer shape of the mixer drum 2. As shown in FIG. 3, the cylindrical tube 21 is provided so as to be positioned below the center in the left-right direction (left-right direction in FIG. 3) of the mixer drum 2. That is, the cylindrical tube 21 is provided below the lowermost part of the mixer drum 2. The cylindrical tube 21 is provided with a supply port 24 that guides water discharged from the pump 40 to the inner hollow portion 22.

  A plurality of injection ports 23 are formed at a predetermined interval along the front-rear direction of the mixer truck 10. The injection port 23 is formed so as to communicate with the hollow portion 22 of the cylindrical tube 21. For this reason, the water guided through the hollow portion 22 of the cylindrical tube 21 is jetted from the jet port 23 toward the lower portion of the mixer drum 2.

  In this way, the cylindrical tube 21 is provided below the lowermost part of the mixer drum 2, and the injection port 23 is formed in the cylindrical tube 21 so as to face the lower part of the mixer drum 2, whereby water is injected from almost directly below the mixer drum 2. can do. For this reason, compared with the case where water is injected from the side of the mixer drum 2, it can reduce that the water injected to the mixer drum 2 scatters in the left-right direction.

  The storage unit 30 is provided below the mixer drum 2 and substantially at the center in the left-right direction of the mixer vehicle 10 so as to store the water sprayed onto the mixer drum 2 by the spray unit 20. The storage part 30 is formed in a concave shape whose upper part is opened by a resin material. The reservoir 30 may not be formed of a resin material, and can be formed of any material.

  More specifically, as shown in FIGS. 1 and 2, the storage portion 30 is formed so as to extend upward as the base portion 30A is fixed to the gantry 1 and the front portion of the mixer truck 10 extends from the base portion 30A. And a rear portion 32 formed so as to extend upward from the base portion 30 </ b> A toward the rear of the mixer vehicle 10. Moreover, as shown in FIG. 3, the storage part 30 has the side part 33 formed so that it may extend toward the outer side upper direction of the left-right direction in the mixer truck 10 from the base 30A. As described above, the storage unit 30 includes the front part 31, the rear part 32, and the side part 33, and is formed so as to cover the lower part of the mixer drum 2.

  As shown in FIG. 3, the injection part 20 is provided in the inner space of the storage part 30 formed in a concave shape covering the lower part of the mixer drum 2 in this way. The injection unit 20 is provided in the center in the left-right direction of the mixer vehicle 10 in the inner space of the storage unit 30. Therefore, the water jetted onto the mixer drum 2 by the jetting unit 20 is guided to the bottom of the storage unit 30 along the inner wall surfaces of the front part 31, the rear part 32, and the side part 33 that cover the lower part of the mixer drum 2. As described above, the storage unit 30 also functions as a cover that prevents the water sprayed to the mixer drum 2 by the spray unit 20 from being scattered outside the mixer vehicle 10.

  As shown in FIGS. 2 and 3, the storage unit 30 further includes a return portion 34 that is formed to protrude inward from the upper end. The return portion 34 is formed to protrude inward from the upper end of the storage portion 30, that is, the opening edge portion. Since the storage unit 30 includes the return portion 34, even when the water at the bottom of the storage unit 30 is shaken due to the shaking of the mixer truck 10, the storage unit 30 may overflow beyond the opening edge of the storage unit 30. Is prevented.

  Moreover, in the storage part 30, the suction port 35 for guide | inducing the stored water to the pump 40 is formed in the center in the left-right direction of the mixer truck 10 (refer FIG. 2).

  The pump 40 is driven by a command from the controller. The pump 40 sucks the water in the storage unit 30 through the first pipe 41 connected to the suction port 35 of the storage unit 30, and the water through the second pipe 42 connected to the supply port 24 of the cylindrical tube 21 in the injection unit 20. Discharge to the injection unit 20. The pump 40 should just be what can guide the water of the storage part 30 to the injection part 20, and can use a small thing.

  Next, a method for cooling the mixer drum 2 by the mixer drum cooling device 100 will be described.

  A predetermined amount of water is stored in the storage unit 30 of the mixer drum cooling device 100 in advance such that the injection port 23 of the injection unit 20 is not blocked.

  When the surface temperature of the mixer drum 2 rises, the pump 40 is driven by a command from the controller. When the pump 40 is driven, the water in the reservoir 30 is sucked into the pump 40 through the suction port 35 and discharged to the hollow portion 22 through the supply port 24 of the cylindrical tube 21 in the injection unit 20. The mixer drum cooling device 100 may be activated manually by providing an activation switch or the like without depending on a command from the controller.

  The water guided to the hollow portion 22 of the injection unit 20 is injected from the injection port 23 to the mixer drum 2. Thereby, the mixer drum 2 is cooled. Since the mixer drum 2 is rotating when the mixer vehicle 10 is traveling, the entire mixer drum 2 can be cooled by continuously injecting water from below.

  Since the lower part of the mixer drum 2 is covered with the storage part 30, the water sprayed to the mixer drum 2 does not scatter to the outside of the mixer truck 10, and the front part 31, the rear part 32, and the side part 33 Guided to the bottom of the reservoir 30 along the inner wall surface.

  In this way, the water jetted from below the mixer drum 2 is stored in the storage unit 30 and is guided again to the injection unit 20 by the pump 40. By circulating the water in this way, the mixer drum 2 can be cooled by a small amount of water.

  The injection unit 20 that injects water and the suction port 35 that guides the stored water to the pump 40 are provided at the center in the left-right direction of the mixer vehicle 10. Thus, by performing suction and discharge of water at the center in the left-right direction of the mixer truck 10, scattering of water toward the left-right direction of the mixer truck 10 can be further prevented.

  Further, when the mixer vehicle 10 is traveling, the vehicle may shake due to curve traveling or braking. Such shaking of the mixer truck 10 may cause the water injected by the injection unit 20 to be scattered outside. In order to prevent the scattering of water due to the shaking of the mixer truck 10, the mixer drum cooling device 100 should be controlled so as to stop the water injection from the injection section 20 when the mixer truck 10 shakes. That's fine.

  Specifically, for example, when the operation of the brake in the mixer vehicle 10 is detected, or when the steering angle of the steering wheel greater than a predetermined angle is detected, the controller may be controlled to stop the pump 40. Thus, when the mixer truck 10 shakes, the water spray from the injection section 20 can be stopped to prevent water from splashing outside the mixer truck 10. The stop of water injection from the injection unit 20 may not stop the pump 40. Providing a valve in either the first pipe 41 or the second pipe 42 of the pump 40, and closing the valve to restrict the passage of water through the first pipe 41 or the second pipe 42. Also good.

  Further, an acceleration sensor may be provided in the mixer vehicle 10 and, when a predetermined acceleration is detected by the acceleration sensor, the pump 40 may be controlled to be stopped by the controller. In this case, when the acceleration of the mixer truck 10 is less than or equal to a predetermined amount, it is not necessary to stop the injection of water from the injection section 20 because the shake of the mixer truck 10 is small.

  According to the above embodiment, there exist the effects shown below.

  According to the mixer drum cooling device 100, the mixer drum 2 can be cooled by injecting water from below the mixer drum 2 by the injection unit 20. Further, since water is injected to cool the mixer drum 2, it is not necessary to store a large amount of water in which the mixer drum 2 is immersed in the storage unit 30 that stores the injected water. For this reason, it is suppressed that the water stored in the storage unit 30 is scattered due to shaking during traveling. Further, by spraying water from below the mixer drum 2, it is possible to prevent water from splashing on the mixer drum 2. Therefore, scattering of water to the outside during traveling of the mixer truck 10 can be suppressed.

  The cylindrical tube 21 of the injection unit 20 is provided below the lowermost part of the mixer drum 2, and the injection port 23 is formed in the cylindrical tube 21 so as to face the lower part of the mixer drum 2. As described above, by spraying water from almost right below the mixer drum 2, scattering of the sprayed water can be reduced as compared with the case where water is sprayed to the mixer drum 2 from the side.

  Further, the cylindrical tube 21 of the injection unit 20 is formed to bend along the outer shape of the mixer drum 2. For this reason, since water can be injected over the whole front-back direction of the mixer drum 2, the whole mixer drum 2 can be cooled.

  Moreover, since the storage part 30 is formed so that the lower part of the mixer drum 2 may be covered, the water injected to the mixer drum 2 can prevent scattering to the exterior of the storage part 30. FIG.

  Moreover, since the storage part 30 has the return part 34 which protrudes inwardly from the upper end, it is a case where the water stored in the storage part 30 is shaken by the shaking during the traveling of the mixer truck 10. However, it is possible to prevent water from overflowing beyond the opening edge of the reservoir 30.

  In addition, when shaking occurs in the mixer vehicle 10 such as during braking or curve driving, the mixer drum cooling device 100 is controlled so as to stop the water injection from the injection unit 20, thereby causing the mixer vehicle 10 to shake. It is possible to prevent the sprayed water from splashing outside.

  Next, a modification of this embodiment will be described.

  In the above embodiment, as shown in FIG. 3, the injection unit 20 is provided in the center in the left-right direction of the mixer vehicle 10 in the inner space of the storage unit 30. Instead, as shown in FIG. 4, in the inner space of the storage unit 30, the injection unit 20 is closer to the rotation direction (the arrow direction in FIG. 4) in the mixer drum 2 than the center in the left-right direction of the mixer vehicle 10. It may be provided on the side (left side in FIG. 4). As a result, the distance that the mixer drum 2 to which the water droplets are ejected by the ejection unit 20 and the water droplets adhere is opposed to the internal space of the storage unit 30 becomes longer, so that the water droplets attached to the mixer drum 2 are more easily stored in the storage unit 30. . Therefore, it is possible to further prevent the sprayed water from scattering to the outside.

  Moreover, in the said embodiment, as shown in FIG. 3, the side part 33 of the storage part 30 is formed symmetrically. Instead, as shown in FIG. 5, the side portion 33A on the right side in FIG. 5 which is the rear side in the rotation direction of the mixer drum 2 is the side portion 33B on the left side in FIG. It may be formed longer outward and upward. As a result, the distance that the mixer drum 2 to which the water droplets are ejected by the ejection unit 20 and the water droplets adhere is opposed to the storage unit 30 is increased, so that the water droplets attached to the mixer drum 2 are more easily stored in the storage unit 30. Therefore, it is possible to further prevent the sprayed water from scattering to the outside.

  Moreover, in the said embodiment, water is used as a cooling medium. Instead, other liquids such as an aqueous solution having excellent cooling performance may be used as the cooling medium.

  In the above embodiment, the pump 40 directly sucks the water stored in the storage unit 30 via the suction port 35 and discharges it to the injection unit 20. Instead of this, a tank in which water injected by the injection unit 20 is circulated may be provided separately from the storage unit 30, and the pump 40 may suck water from the tank and discharge it to the injection unit 20. Specifically, for example, the storage unit 30 includes a receiving unit that is provided below the mixer drum 2 and receives the water injected by the injection unit 20 onto the mixer drum 2, and a tank to which the water received by the receiving unit is guided. The pump 40 may be one that guides water from the tank to the injection unit 20. In this case, a water tank for washing the mixer drum 2 that is generally provided in the mixer truck 10 can be used as the tank. That is, the pump 40 may be any pump that directly or indirectly guides the water stored in the storage unit 30 to the injection unit 20.

  The embodiment of the present invention has been described above. However, the above embodiment only shows a part of application examples of the present invention, and the technical scope of the present invention is limited to the specific configuration of the above embodiment. Absent.

DESCRIPTION OF SYMBOLS 10 Mixer vehicle 1 Base 2 Mixer drum 3 Hopper 4 Drum drive device 100 Mixer drum cooling device 20 Injection part 21 Cylindrical tube 22 Hollow part 23 Injection port 30 Storage part 31 Front part 32 Rear part 33 Side part 34 Return part 40 Pump

Claims (3)

A mixer drum cooling device for cooling a mixer drum mounted on a mixer vehicle,
An injection unit that is provided below the mixer drum and injects a cooling medium from below to the mixer drum;
A storage unit that is provided below the mixer drum and stores the cooling medium that the injection unit has injected onto the mixer drum;
A pump for guiding the cooling medium stored in the storage unit to the injection unit;
A controller for controlling the pump,
When any one of the brake operation of the mixer vehicle, the steering angle of the steering wheel greater than a predetermined angle, and the acceleration greater than the predetermined angle of the mixer vehicle is detected, the controller supplies the coolant from the injection unit. A mixer drum cooling device, wherein injection is stopped .   The storage portion includes a lateral portion formed so as to extend upward in the lateral direction of the mixer truck, and a forward portion formed so as to extend upward as it goes forward and rearward of the mixer truck, respectively. 2. The mixer drum cooling device according to claim 1, wherein the mixer drum cooling device is formed so as to cover a lower portion of the mixer drum.   The mixer drum cooling device according to claim 2, wherein the storage portion has a return portion formed to protrude inward from an upper end.

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