JPH05254637A - Transport of ready mixed concrete and device therefor - Google Patents

Abstract

PURPOSE:To reduce installation cost and save labor and improve efficiency by transporting ready mixed concrete on a belt conveyor equipped with a cleaning device for removing slurry. CONSTITUTION:A ready mixed concrete supplied from a primary hopper 2 is transported to a secondary hopper 18 by a rubber belt 5, without being sunk, by a plurality of carrier rollers 7, without overflowing from the rubber skirt 9 of an overflow preventing device. Then, almost all the slurry adhering on the rubber belt 5 is removed by a primary removing scraper 11, and then the rubber belt 5 is immersed into the water in the water tank 16 of a cleaning device 14, and the residual fine slurry is completely rinsed by a rotary brush 15 which revolves in the reverse direction to the transport direction of the rubber belt 5. Then, the cleaned rubber belt 5 is returned into a reciving part 6 after being wiped by a secondary draining scraper 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided in a predetermined position at a relatively high speed by allowing fresh concrete kneaded by a mixer at the time of conveying fresh concrete to flow directly or from a primary hopper without overflowing onto a belt conveyor. The present invention relates to a method and an apparatus for conveying fresh concrete, in which the belt portion of the belt conveyor after being put into the secondary hopper is washed with water.

[0002]

2. Description of the Related Art Conventional methods and apparatuses for transporting ready-mixed concrete mainly adopt methods and apparatus for transporting by means of a suspension type, a trolley type moving hopper or a ready-mixed concrete pressure pump.

[0003]

SUMMARY OF THE INVENTION In the meantime, however, such a conventional transfer device for ready-mixed concrete using a moving hopper or a pressure pump is a crane for traveling in space or on the ground,
Vehicles such as curing equipment, formwork or product moving lifts are inconvenient to pass, and equipment costs and maintenance costs are high, and at the same time, the transfer speed is relatively slow. There are many problems such as blockage in the pipe due to.

Furthermore, in such a conventional technique, a moving hopper is structurally required to be structurally strong and is a device that can withstand a heavy load in accompaniment with batch-wise transportation, which is complicated. In addition to the robust mechanism, there is a problem that not only the equipment cost and maintenance cost increase, but also cleaning is required at the time of changing the composition or at the end of the work. , Solidification of residual concrete when pump is stopped, sometimes pipe clogging due to cross-linking of coarse aggregates, difficulty in cleaning at the end of work, treatment of cleaning drainage, labor saving and efficiency of pump maintenance, etc. ..

Further, it has been attempted to convey the fresh concrete by a belt conveyor, but it is difficult for the belt conveyor to completely remove the adhered sludge, and at the same time, solidification of the overflow in the receiving section, Due to the problems such as the meandering of the belt accompanying the consolidation, it has not been used at all.

Therefore, an object of the present invention is to solve the above problems in the prior art by overflowing fresh concrete kneaded by a mixer at the time of transporting fresh concrete or directly from a primary hopper onto a belt conveyor. Provided is a method and an apparatus for conveying fresh concrete, in which it is poured without flowing and is charged into a secondary hopper provided at a predetermined position at a relatively high speed, and the belt portion of the belt conveyor after charging is washed with water. To do.

[0007]

In order to achieve the above object, according to the present invention, a method for conveying fresh concrete is such that a mixer or a primary hopper for mixing a given concrete secondary of the raw concrete after kneading. It is characterized in that the conveyor to the secondary hopper for loading the product form is carried out by the belt conveyor equipped with the sludge removing device, not by the moving hopper or the pressure feeding pipe.

Further, according to the present invention, the fresh concrete carrying device is used for carrying the kneaded fresh concrete from the mixer or the primary hopper to the secondary hopper for feeding a predetermined concrete secondary product form. A plurality of carrier rollers are arranged in the receiving part of the belt conveyor, and an overflow preventive device having a belt-adhering rubber skirt made of hard rubber is arranged on the upper part thereof. It is characterized in that the cleaning is performed by a cleaning device including a secondary cleaning mechanism including a rotating brush, a water tank, and a draining scraper, which are driven by the rotational force of the removal scraper and the turn roller.

[0009]

Therefore, by means of the above-mentioned means, when the fresh concrete is conveyed, the fresh concrete mixed by the mixer is poured directly or from the primary hopper into the receiving part of the belt conveyor without overflowing, and by the belt conveyor. It can be charged at a relatively high speed into a secondary hopper provided at a predetermined position, and the belt portion of the belt conveyor after the injection of the fresh concrete is first removed by the primary removal scraper to remove the adhered sludge, and then the turn roller. The belt portion is washed with water by the rotating brush that is rotated in the water tank by using the rotating force as power, and the adhering water and a small amount of adhering sludge are completely removed by the adjacent draining scraper. Moreover, such a transport device is
If installed linearly so as to satisfy space usage conditions and obstacle avoidance, the weight load per unit length is reduced in order to convey a predetermined amount continuously, and the facility is simple and lightweight, As a result, the equipment cost becomes extremely cheap,
Furthermore, since the adhered sludge is continuously and automatically washed, there is no need for cleaning during operation and at the end of work, no human labor is required, and the operation of the equipment can be performed by opening and closing the damper on the primary side hopper and turning on and off the power. Only the operation is required, and labor saving and efficiency can be achieved.

Other objects, features and advantages of the present invention will become apparent from the following detailed description, taken in conjunction with the accompanying drawings.

[0011]

1 and 2 of the drawings show an embodiment of a carrying apparatus for carrying out the carrying method for ready-mixed concrete of the present invention. As shown in the drawing, the carrying apparatus 1 for ready-mixed concrete of the present invention is , A belt conveyor 3 having a long endless rubber belt 5 hung on a frame 4, a plurality of which are provided in a receiving portion 6 of the belt conveyor 3 for receiving fresh concrete after kneading supplied from a mixer or a primary hopper 2. The individual carrier roller 7 and the rubber belt 5 on the receiving portion 6 of the belt conveyor 3 to prevent overflow of green concrete.
Overflow preventive device 8 consisting of a hard rubber skirt 9 closely attached to the head pulley 1 of the belt conveyor 3
The rotary brush 1 that comes into contact with the rubber belt 5 at the primary removal scraper 11 provided immediately after 0 and the belt bending portion 13 formed at the belt return portion 12 of the belt conveyor 3.
5 and a cleaning device 14 in which a water tank 16 for immersing the rotary brush 15 in water is provided, and a secondary drainer scraper 17 provided in the belt bending portion 13 is mainly configured.

In general, the belt conveyor 3 receives the fresh concrete supplied from the mixer or the primary hopper 2 at the receiving portion 6, and conveys the fresh concrete to a predetermined concrete secondary product form-filling secondary hopper 18. Used for. A plurality of carrier rollers 7 are provided in the receiving portion 6 of the belt conveyor 3 as described above, so that the sinking of the rubber belt 5 by the fresh concrete in the receiving portion 6 is prevented and the receiving portion 6 of the belt conveyor 3 is prevented. The frame 4 is provided with a rubber skirt 9 made of hard rubber so as to be in close contact with the rubber belt 5, and an overflow prevention device 8 is provided to prevent the fresh concrete supplied to the receiving portion 6 of the belt conveyor 3 from overflowing. There is.

The ready-mixed concrete received by the belt conveyor 3 is a secondary hopper 18 for introducing a required concrete secondary product formwork in which the head pulley 10 is located.
Is transported to the secondary hopper 18. This head pulley 10 is made of fresh concrete and has a secondary hopper 1
Immediately after being put into the No. 8 primary removal scraper 1
1 is provided in contact with the rubber belt 5.

A belt bent portion 13 is provided at the return portion 12 of the belt conveyor 3 so as to project at a substantially right angle. The belt bent portion 13 is in contact with the rubber belt 5 on the turn roller 20 of the bent portion 13 and comes out of the turn roller 20. There is provided a cleaning device 14 having a rotating brush 15 which is provided so as to be rotated by receiving a rotational force. The rotating brush 15 of the cleaning device 14 is rotatably supported in a water tank 16 so as to be constantly immersed in water, and the rotating brush 1 is always supported on the rubber belt 5.
5 is abutted to clean the rubber belt 5.
In addition, the water tank 16 is provided with a movable rod 21 which is rocked back and forth so as to stir the water in the water tank 16, so that it is rocked via a cam 22 by receiving a rotational force from the rotary brush 15 described above. Made of As another stirring method, an air outlet 23 can be provided instead of the movable rod 21 for stirring so as to constantly supply a small amount of bubbles into the water tank 16. Further, a drain valve 24 for draining and draining sludge is provided at the bottom of the water tank 16.
Is provided. Further, a secondary drainer scraper 17 is provided so as to wipe the rubber belt 5 washed by the rotating brush 15.

According to the conveying method and the conveying device of the fresh concrete of the present invention having the above-mentioned structure, the receiving concrete 6 of the belt conveyor 3 receives the kneaded raw concrete supplied from the mixer or the primary hopper 2. The rubber skirt 9 of the overflow prevention device 8 prevents the rubber skirt 9 from overflowing, and the plurality of carrier rollers 7 receives the rubber belt 5 without sinking. It is transported to 18. Immediately after the ready-mixed concrete is put into the hopper 18 for putting the concrete secondary product form, the rubber belt 5 is first removed by the primary removal scraper 11 from most of the sludge adhered to the rubber belt 5, and only the fine sludge is left on the rubber belt 5. It remains attached. The fine sludge left behind by the primary removal scraper 11 and still adhering to the rubber belt 5 is then immersed in water in the water tank 16 of the cleaning device 14 and the rotating brush 15 rotating in the direction opposite to the conveying direction of the rubber belt 5. The rubber belt 5 is brushed by the contact of the above, and the fine sludge is completely washed off. The belt conveyor 3 thus brushed and cleaned
The rubber belt 5 is wiped by the secondary draining scraper 17 and returned to the receiving section 6, and then the fresh concrete is again received from the primary hopper 2 and conveyed to the secondary hopper 18 for introducing the concrete secondary product formwork.

The fine sludge washed off in the water tank 16 of the cleaning device 14 floats in the water because the water in the water tank 16 is constantly stirred or air bubbles are constantly supplied to the water little by little. Therefore, the solidification of sludge can be effectively prevented. The sludge settled in the water tank 16 can be satisfactorily discharged only by opening the discharge valve 24 on a daily basis.

[0017]

As described above, according to the method and the apparatus for conveying fresh concrete of the present invention, the raw concrete kneaded by the mixer is fed directly or from the primary hopper when the fresh concrete is conveyed. When the belt conveyor receives the carrier roller and the overflow prevention device at the receiving part of the belt conveyor, the rubber belt can be poured in without sinking and the fresh concrete does not overflow. It can be put into the hopper, and the rubber belt part of the belt conveyor after putting the fresh concrete is first removed by the first removing scraper to remove the adhered sludge, and then rotated in the water tank by using the turning force of the turn roller as power. The rubber belt is washed with water by the rotating brush of the cleaning device to remove fine sludge. Rutotomoni, balance water and mud is completely removed by the secondary draining scraper adjacent. Moreover, if such a conveying device is installed linearly in advance so as to satisfy the usage conditions of the ground and space and avoidance of obstacles, it is possible to continuously convey a predetermined amount of fresh concrete per unit length of the belt conveyor. The weight load of the equipment is reduced, the equipment is simple and lightweight, the equipment cost is extremely low as a result, and the adhered sludge is continuously and automatically washed. There is no need for cleaning at the time, it is sufficient to simply discharge the sludge that has settled in the water tank on a daily basis, no human labor is required, and the operation of the equipment can be done by opening and closing the damper of the primary side hopper and turning on the power supply as needed. Only the incision operation is required, and one-handed work of the staff for placing the formwork is sufficient, and labor saving and efficiency can be achieved.

The need for frequent replacement of the aquarium wash water, which was initially feared from the actual use situation of the method and apparatus for transporting ready-mixed concrete of the present invention, is eliminated,
During the 8th working period, there is no problem in operating for about 4 hours without replacing the wash water. That is, the cement and the fine aggregate powder settled due to the difference in specific gravity, and the clean water was judged to be successful because the clean water was relatively purified.

[Brief description of drawings]

FIG. 1 is a schematic view of a carrying device for carrying out the ready-mixed concrete carrying method of the present invention.

FIG. 2 is a side view of the transfer device shown in FIG.

[Explanation of symbols]

 1 Conveyor 2 Primary hopper 3 Belt conveyor 4 Frame 5 Rubber belt 6 Receiving part 7 Carrier roller 8 Overflow prevention device 9 Rubber skirt 10 Head pulley 11 Primary removal scraper 13 Belt bending part 14 Cleaning device 15 Rotating brush 16 Water tank 17 2 Next drainer scraper 18 Secondary hopper 20 Turn roller 21 Movable rod 22 Cam 23 Air discharge port 24 Discharge valve

Continuation of front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display area E04G 21/04 7228-2E // B65G 15/00 7030-3F 9245-3F B65G 45/00 E

Claims (3)

[Claims] 1. A cleaning device for removing sludge from a mixer or a primary hopper, which has been mixed and kneaded, to a secondary hopper for feeding a predetermined concrete secondary product form, without using a moving hopper or a pressure-feeding pipe. A method of transporting ready-mixed concrete, characterized in that it is carried out by a belt conveyor equipped with. 2. A plurality of carrier rollers are arranged in a receiving portion of a belt conveyor used for transporting fresh concrete after kneading from a mixer or a primary hopper to a secondary hopper for introducing a predetermined concrete secondary product formwork. In addition to the above, an overflow preventive device with a belt-adhering rubber skirt made of hard rubber is installed on the upper part, and further, the adhered sludge after transportation is rotated using the rotational force of the primary removal scraper and the turn roller as power. A fresh concrete carrying device characterized in that it is carried out by a cleaning device comprising a secondary cleaning mechanism including a brush, a water tank, and a draining scraper. 3. The sludge that precipitates and solidifies in a water tank by washing with a rotating brush is taken out by using the rotating function of the system as a power source to operate a stirring rod, or air is introduced from the outside of the system to move the precipitate. The transport device for ready-mixed concrete according to claim 2, further comprising a device for preventing solidification at all times.