JPH0750174Y2 - Cleaning equipment in rotating drum of concrete mixer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention mainly relates to a cleaning device for cleaning the inside of a rotating drum of a concrete mixer.

(Prior Art) Generally, in the rotary drum of a concrete mixer truck, after unloading the fresh concrete, it is necessary to remove the residue adhering to the rotary drum before solidifying it. On the other hand, the rotary drum has spiral blades for stirring and discharging, and the back side cannot be directly cleaned from the outside.

For this reason, conventionally, when normal ready-mixed concrete is loaded, after unloading, a large amount of water is put in the drum, and the drum is rotated to wash it away.

In addition, in the case of special concrete such as underwater concrete, it is necessary to put the chemical agent in the mixer and stir it in the drum to manufacture it. Since it solidifies in a short time after dropping, a method is adopted in which a large amount of crushed stone is put into the drum immediately after unloading, the drum is rotated, and the raw concrete residue is attached to the crushed stone and discharged.

(Problems to be solved by the invention) Among the conventional methods described above, the method of introducing the cleaning water is
Since a large amount of water mixed with cement is discharged, the treatment is troublesome, and moreover, the residue adhering to the front and back of the blades inside the drum cannot be sufficiently removed, and the solidified concrete gradually accumulates inside the drum. There is a problem of overlapping.

In addition, in the method of using crushed stones, it costs a lot of money to purchase crushed stones, and a large amount of crushed stone slag remains after the use of the crushed stones.
There is a problem that the drum is greatly worn and cannot be completely cleaned.

In view of the above-mentioned conventional problems, the present invention is a cleaning device for a concrete mixer rotating drum, which can completely wash off even a high-viscosity raw concrete such as underwater concrete to every corner of the drum with a small amount of cleaning water. The purpose is to provide.

(Means for Solving the Problems) The gist of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose is to reciprocate in the axial direction with respect to a self-supporting support base. A beam which is freely supported and whose tip can be inserted into a concrete mixer rotating drum, a beam reciprocating drive means for reciprocating the beam in an axial direction, and a direction at the tip of the beam which is orthogonal to the axial direction of the beam. A pair of wash water injection nozzles supported rotatably about the support shaft of the beam, and one of the wash water injection nozzles, at least from the direction of the front end of the beam diagonally forward, to the axial direction of the beam. A nozzle reciprocating drive means for reciprocally rotating the other at least in a range of a direction diagonally rearward from a direction orthogonal to the axial direction of the beam, and high-pressure cleaning for the nozzle. The present invention resides in a washing device in a rotating drum of a concrete mixer, which is provided with a washing water supply means for feeding water.

(Operation) When this device is used, for example, the tip end of the beam is supported by a beam reciprocating drive means in a state that the tip of the beam is supported in a rotating drum of a mixer truck after being unloaded, while being supported by a support base that is independent of the mixer truck. It is operated and inserted, the rotary drum is rotated, the cleaning water is sprayed from both cleaning water spray nozzles, and the beam is gradually pulled out while the nozzle driving means reciprocally rotates the direction of each nozzle back and forth. As a result, one nozzle cleans the side from the front side to the front side, and the other nozzle cleans the side from the side to the rear side, so that high-pressure thin jet water jets are applied to both the front and back sides of the blades in the rotary drum for cleaning. .

In addition, when the rotating drum is rotated while reciprocally rotating each nozzle in the front-rear direction, the cleaning surface becomes wavy in a band shape,
By appropriately synchronizing the movements of both nozzles, the unwashed portion due to one waviness can be washed by the other waviness.

(Example) Next, the Example of this invention is described about drawing.

This embodiment shows a case where the inside of the rotating drum of a concrete mixer truck is cleaned. In FIG. 1, 1 is a concrete mixer truck, 2 is a rotating drum, and 3 is a protrusion on the inner surface of the rotating drum 2. Spiral blades 4 are cleaning water tanks mounted on the mixer truck 1.

Reference numeral 10 is a cleaning device according to the present invention for cleaning the inside of the rotary drum 2 after unloading the load, and 11 is a carriage supported by this device.

The dolly 11 has a prop whose height can be adjusted by a manual jack 12.
13 are erected, and a support base 14 is provided on the upper end of the column 13. The support base 14 has a horizontal axis 15 with respect to the column 13.
The screw shaft 16 is pivotally attached by means of a handle 17 so that its angle is adjusted by moving the screw shaft 16 in and out in the axial direction.

A beam 18 is supported on the support base 14 so as to be reciprocally movable in the axial direction, and is composed of an electric motor 19 with a reduction gear, a winch operated by this, and a wire 21 on the lower surface of the beam 18 wound by a winch 20. It is adapted to be reciprocally driven by the beam reciprocating drive means 22.

Two cleaning water jet nozzles 30 and 31 are provided at the tip of the beam 18. Both injection nozzles 30 and 31 are shown in FIGS.
Support shafts 32a and 32b in the direction orthogonal to the beam 18 as shown in the figure.
Rotatably supported with respect to the nozzle driving means
It is adapted to be reciprocally rotated by 33.

The nozzle driving means 33 is composed of a pair of cranks 35a, 35b which are projected and rotated on both side surfaces of the gear box 34, and rods 36a whose both ends are pin-connected to the cranks 35a, 35b and the injection nozzles 30, 31, respectively. , 36b and housed in the gearbox 34,
A worm gear mechanism 37 that transmits rotation to the same crankshaft 35 of both cranks 35a and 35b, and a rotation shaft 38 that is disposed along the beam 18 and that is rotated by the worm gear mechanism 37 and that is supported at the rear end of the beam 18. And an electric motor 39 for rotating.

Then, both of the injection nozzles, from the direction orthogonal to the axial direction of the beam 18, one injection nozzle 30 has a front side substantially 45 ° range, and the other injection nozzle 31 has a rear side substantially 45 ° angle range. The lengths of the rods 36a and 36b and the lengths of the turning radii of the cranks 35a and 35b are set so that they are respectively reciprocally rotated. The injection angle can be freely changed by changing the lengths of the rods 36a and 36b and the turning radiuses of the cranks 35a and 35b.

Both injection nozzles 30 and 31 have support rods inside the hollows of the support shafts 32a and 32b.
A pressure pump via a water passage pipe 41 along the beam 18 and a water passage hose 42 connected to the rear end of the water passage pipe 41 in 40.
High-pressure water is supplied by 43 (shown in FIG. 1). The pressure pump 43 sucks and sends out the water in the tank 44, and as an example, the water in the tank 4 of the mixer truck 1 is replenished in the tank 44.

When using the cleaning device configured as described above, the first
As shown in the figure, by adjusting the angle and height of the beam 18 to the center of rotation of the rotary drum 2 of the mixer truck 1,
While rotating, the high-pressure injection is performed from both injection nozzles 30 and 31, and the nozzle driving means 33 is operated to move the beam 18 in the direction of gradually inserting it from the opening. Then, while rotating the rotary drum 2, high-pressure water is jetted from both jet nozzles 30 and 31, and at the same time, the nozzle drive means 33 is operated to operate the beam 18 in a direction to gradually draw it out. As a result, thin rod-shaped jet water streams from both jet nozzles 30 and 31 are jetted all over the inner surface of the rotary drum 1. When the blade 3 is inserted, the front side of the blade 3 is strongly washed by the jet nozzle 30 that reciprocates forward, and when the blade 3 is pulled out, the back side of the blade 3 is reciprocally rotated rearward by the jet nozzle 31. In response to the strong washing, the jet water is strongly jetted to the surface side of the blade 3, so that the inside of the drum 2 is thoroughly washed.

The above-described embodiment shows the case of cleaning the inside of the rotary drum of the concrete mixer truck. However, it may be carried out for cleaning the rotating drum of a stationary concrete mixer, and it can be carried out not only for underwater concrete but also for ordinary ready-mixed concrete mixers.

Further, in the present invention, in addition to the above, the injection nozzle may be rotated in the circumferential direction of the beam.

(Effects of the Invention) As described above, the cleaning device in the concrete mixer rotary drum of the present invention reciprocates between the tip of the beam inserted in the rotary drum and the diagonally forward side from the portion right beside the beam axis. An injection nozzle and an injection nozzle that reciprocally rotates from a portion right beside in the beam axis direction to an oblique rear side are provided, and cleaning water is ejected while rotating these in the front-rear direction to move the beam. By this, the front and back of the blades inside the rotating drum can be efficiently cleaned, and since it is possible to clean with the jet water that is jetted in a rod shape by the straight-ahead jet nozzle, even high-viscosity materials such as underwater concrete can be cleaned with high pressure. It can be completely washed off with a jet water flow, and the amount of wash water is small, so the water supply equipment such as the pressure pump for water supply can be small, and the water treatment after cleaning is easy. There are effects such as low expenses.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic view of a state of use, FIG. 2 is a side view, FIG. 3 is a plan view of an injection nozzle portion, and FIG. 4 is a side view thereof. 1 ... Concrete mixer truck, 2 ... Rotating drum, 3
...... Blade, 10 …… Cleaning device, 11 …… Bogie, 13 …… Post,
14 ... Support base, 18 ... Beam, 22 ... Beam reciprocating driving means, 30, 31 ... Injection nozzle, 33 ... Nozzle driving means, 4
2 ... Pressure pump.

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Claims (1)

[Scope of utility model registration request] 1. A beam, which is supported by a self-supporting support base so as to be reciprocally movable in the axial direction and has a tip end insertable into a concrete mixer rotating drum, and a beam reciprocating drive means for reciprocating the beam in the axial direction. And at the tip of the beam,
At least one of the pair of cleaning water jet nozzles, which is rotatably supported about a support shaft orthogonal to the axial direction of the beam, and one of the cleaning water jet nozzles, is diagonally forward from the tip of the beam. Nozzle reciprocating driving means for reciprocating the other in a range of a direction orthogonal to the axial direction of the beam and at least the other in a range of a direction diagonally rearward from a direction orthogonal to the axial direction of the beam,
A cleaning device for a rotating drum of a concrete mixer, comprising: a cleaning water supply means for supplying high-pressure cleaning water to the nozzle.