JPH0627112U - Concrete mixer truck - Google Patents

Abstract

(57) [Summary] [Purpose] Equipped with a concrete mixer truck, especially a water tank etc. for washing residual concrete adhering to the inside of the mixing drum, input hopper and discharge chute after discharging the raw concrete at the construction site. The purpose is to make it possible to easily reuse the water used for washing for the concrete mixer truck as the compounding water for the cement and aggregate to be added to the mixing drum during the next transportation. [Structure] In a concrete mixer car equipped with a water tank 5 etc. for cleaning the fresh concrete remaining in the mixing drum 2, the input hopper 3 and the discharge chute 4 etc. after discharging the fresh concrete at the construction site etc. The water meter 10 for measuring the amount of water supplied from the water tank 5 used for

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a concrete mixer truck. More specifically, the present invention relates to a concrete mixer vehicle equipped with a water tank or the like for cleaning raw concrete remaining in a mixing drum, a charging hopper, and a discharge chute after discharging the raw concrete at a construction site or the like.

[0002]

[Prior art]

 A concrete mixer truck generally mixes cement, gravel, and other aggregates and water in a prescribed ratio at a concrete plant factory, etc., and then puts it into a mixing drum installed in the mixer truck, and stirs it to cure the raw concrete. It will be transported to the construction site while preventing this. After discharging the ready-mixed concrete in the mixing drum at the construction site, etc., it is necessary to immediately wash it with water before the residue of the ready-mixed concrete remaining in the drum, input hopper, discharge chute, etc. solidifies. Mixer trucks are generally equipped with water tanks so that they can be easily washed at the site or in the vicinity where there is no water after discharge.

The water in the water tank is guided to the inside of the drum, the input hopper, the discharge chute, and the like via a water supply pump, a hose, and the like, and the water is jetted from a nozzle installed in a predetermined position in advance and automatically. Cleaning is performed manually or by a worker. Also, if the water after cleaning is thrown into sewage, etc., it will cause the raw concrete to solidify and become clogged. For example, even a small amount of water used to wash the discharge chute, etc., will not be thrown away on the spot, but will be put into the drum once. After being collected and returned to the plant factory, etc., it is treated as industrial waste liquid.

[0004]

[Problems to be solved by the device]

 However, treating the wash water as an industrial waste liquid as described above requires a great deal of labor and equipment, and there are drawbacks such as an increase in cost. Therefore, it is conceivable to reuse the above-mentioned washing water as the mixed water that is mixed with the cement or aggregate that is added to the mixing drum during the next transportation, but the amount of water used for washing is not always constant and may vary depending on the season. Since it varies depending on the operator, etc., if it is used as it is as mixing water, there is a problem that the mixing ratio will change and the viscosity of concrete will change, making it impossible to convey and supply homogeneous green concrete.

The present invention has been proposed in view of the above problems, and the cleaning water as described above is mixed with cement or aggregate at the time of the next transportation without changing the quality of the fresh concrete to be fed. The purpose is to be able to reuse it as compounded water.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the concrete mixer truck according to the present invention has the following configuration. That is, in a concrete mixer truck equipped with a water tank for washing raw concrete remaining in the mixing drum, input hopper and discharge chute after discharging the raw concrete at the construction site, etc. It is characterized by having a water meter for measuring the amount of water supplied from the tank.

[0007]

[Action]

 By installing a water meter that measures the amount of water supplied from the water tank used for cleaning as described above, the amount of water used for cleaning, that is, the inside of the drum, the hopper, the discharge chute, etc. was cleaned and recovered in the drum. Know the amount of water. With the cleaning water left in the drum, mix the cement and aggregate to be added to the mixing drum during the next transport with the predetermined amount of water to be mixed and subtract the above amount of cleaning water. By using the above washing water as blending water, it is possible to transport and supply concrete with a certain mixing ratio by pouring it into the drum.

[0008]

[Embodiment] Hereinafter, a concrete mixer truck according to the present invention will be concretely described based on an embodiment shown in the drawings. FIG. 1 is a side view showing an embodiment of a concrete mixer truck according to the present invention. In the figure, reference numeral 1 is a concrete mixer truck, a mixing drum 2 is mounted on the rear portion of the vehicle body, and a charging hopper 3 and a discharging chute 4 are provided on the rear portion of the drum 2. A water tank 5 for storing water for cleaning the drum 2, the charging hopper 3, the chute 4 and the like is provided on the vehicle body in front of the mixing drum 2, and below the water tank 5. A water pump 6 is provided.

The water pump 6 guides the water from the water tank 5 to the rear part of the vehicle body through the hose 7 and the like to wash the drum 2, the charging hopper 3 and the discharge chute 4, and the like in the illustrated example. A control box 8 having a switching valve, etc. (not shown) is connected to the rear end of the control unit 7. From the control box 8, a jet nozzle (not shown) arranged in the charging hopper 3 or the drum 2, and a cleaning hose are connected. It is configured so that water is selectively switched to 9 or the like and water is supplied to wash automatically or manually.

In the illustrated example, a water meter 10 is arranged in the vicinity of the control box 8 and in the middle of a hose 7 that connects the water pump 6 with the box 8. It suffices that the water meter 10 be able to satisfactorily measure the amount of water used for washing, and the arrangement position, structure, etc. are appropriate. The water meter 10 may be a so-called reset type or an integrating type, and for example, an existing water meter or the like can be used.

In the above configuration, the fresh concrete transported from the concrete plant factory or the like by the concrete mixer car is discharged to the construction site, etc., and when all the discharge is completed, immediately wash the site or its vicinity. Start. At that time, before starting cleaning, in the case of a reset type water meter, reset the scale to the initial value or confirm that it has already been reset. In addition, in a water meter of the integrating type, the current value is read and recorded, or if it is already read and recorded, it is confirmed whether it matches the recorded value, and by any chance, If they are different, record the current value.

Then, the raw concrete remaining on the mixing drum 2, the charging hopper 3, the discharging chute 4, etc. is sent from the water tank 5 by the water pump 6 via the hose 7, water meter 10, etc. Wash with. At that time, the water used to wash the drum 2 and the throw-in hopper 3 is automatically collected in the drum 2, and the water used to wash the discharge chute 4 is temporarily stored in a bucket or the like arranged at the lower end of the chute 4. Then, put it in Drum 2.

As a result, all the water used for cleaning the drum 2, the hopper 3, the chute 4, etc. is collected in the drum 2, and the total amount of water is measured by the water meter 10. That is, in the reset type water meter, the value displayed on the water meter is the total amount of water used for this cleaning, and in the cumulative water meter, the value after the current cleaning. The value obtained by subtracting the value before the start of cleaning from the value is the total amount of water used for this cleaning.

The total amount of water or the value displayed on the water meter is recorded as needed, and when the water is again transported by the concrete mixer truck, the washing water collected is left in the drum 2 and then added. It is sufficient to mix the cement and aggregate to be mixed with a predetermined amount of water to be mixed with the above-mentioned amount of water, which is obtained by subtracting the total amount of the above-mentioned washing water, into a concrete plant factory, etc. As a result, it becomes possible to transport and supply homogeneous concrete with a predetermined mixing ratio, using the above-mentioned cleaning water as blending water.

[0015]

[Effect of device]

 As explained above, the concrete mixer truck according to the present invention is equipped with the water meter for measuring the amount of water supplied from the water tank that has been subjected to cleaning as described above, and therefore the amount of water used for cleaning, that is, in the drum, hopper, and The amount of cleaning water collected in the drum after cleaning the discharge chute, etc. can be easily understood, and while leaving the cleaning water in the drum, the cement and aggregate to be added next and the predetermined amount of water to be mixed with the above should be used. By mixing the amount of water minus the amount of the washing water of the above and adding it into the drum, it is possible to use the above washing water as the compounding water and to transport and supply a homogeneous concrete with a predetermined mixing ratio. Therefore, there is an effect that the intended purpose can be achieved by an extremely simple structure.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a concrete mixer truck according to the present invention.

[Explanation of symbols]

 1 Concrete mixer truck 2 Mixing drum 3 Input hopper 4 Discharge chute 5 Water tank 6 Water pump 7 Hose 8 Control box 10 Water meter

Claims (1)

[Scope of utility model registration request] 1. A concrete mixer truck equipped with a water tank or the like for washing the fresh concrete remaining in the mixing drum, the input hopper, and the discharge chute after discharging the fresh concrete at a construction site or the like, and used for washing. Concrete mixer truck equipped with a water meter for measuring the amount of water supplied from the above-mentioned water tank