JP3151261B2 - Mixer cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixer cleaning apparatus capable of cleaning a mixer used in a batcher plant with high-pressure fresh water.

[0002]

2. Description of the Related Art In a batcher plant, ready-mixed concrete is kneaded by a mixer and then shipped. However, it is necessary to appropriately remove the ready-mixed concrete adhering to the inner surface of the mixer by washing. For this reason, a mixer cleaning device has been conventionally used.

[0003] As an example of a conventional cleaning apparatus, there is one shown in FIG. 3, for example, in which a is a two-axis mixer, b is a plurality of fixed nozzles mounted on the upper part of the two-axis mixer a, and c is cleaning water. d is a head tank that stores d, e is a washing water supply line that supplies washing water d from the head tank c to each fixed nozzle b, f is a line pump connected to the washing water supply line e, and g is washing. A valve connected in the water supply line e so as to be located upstream of the line pump f, h is a solenoid valve connected in the washing water supply line e so as to be located downstream of the line pump f, etc. Control valve.

In the above-mentioned washing apparatus, for example, during normal operation, the valve g is kept open, and when the kneading and shipping of the ready-mixed concrete a predetermined number of times from the twin-screw mixer a is completed, the control valve h and the line pump f Is supplied with a cleaning command signal. Therefore, the control valve h is opened and the line pump f is driven, and the washing water d in the head tank c is supplied to the washing water supply line e.
To the line pump f, pressurized by the line pump f, and from the washing water supply line e to each fixed nozzle b
The water is sprayed into the twin-screw mixer a, and the inside of the twin-screw mixer a is washed by the sprinkled washing water d. The water after washing is discarded outside the twin-screw mixer a.

FIG. 4 shows another example of a conventional washing apparatus. In the figure, i is a water measuring hopper capable of measuring the weight of water by a load cell, and j is a water measuring hopper i. A control valve also connected to the lower part, k is a metering water receiving hopper disposed below the control valve j, l is a fixed nozzle having metering water m from the metering water receiving hopper k attached to the upper part of the biaxial mixer a. A metering water feed line for feeding b, and n is a submersible pump connected to the metering water feed line l.

[0006] In the above-described cleaning device, the one-axis mixer
The water is measured in the water measuring hopper i during the kneading of the ready-mixed concrete, a signal is given to the control valve j after the measurement, the control valve j is opened, the water is supplied to the measuring water receiving hopper k, and the measuring water receiving hopper k The metered water m inside is drawn from the metered water supply line l to the submersible pump n, pressurized by the submersible pump n, and sent from the metered water supply line l to each fixed nozzle b to be in the two-axis mixer a. The inner surface of the twin-screw mixer a is washed with the metered water m. in this case,
The washing water is not drained and is used as kneading water for kneading ready-mixed concrete.

[0007]

The mixer cleaning apparatus shown in FIG. 3 cannot perform cleaning of the twin-screw mixer a while kneading and shipping of ready-mixed concrete, and the pressure of the line pump f increases. Since the water is low, the force of the washing water d to be sprinkled is weak, so that the inner surface of the biaxial mixer a cannot be sufficiently cleaned, and the fixed nozzle b has a fixed watering direction, so that the entire interior of the biaxial mixer a Requires a number of fixed nozzles b.

The mixer washing apparatus shown in FIG. 4 can be used even when the kneading and shipping of ready-mixed concrete is performed.
Can be performed, but the submersible pump n has a low pressure so that the measured water m
Is weak, so that the inner surface of the biaxial mixer a cannot be cleaned cleanly. Further, since the direction of spraying of the fixed nozzle b is determined, a large number of fixed nozzles are required to clean the entire interior of the biaxial mixer a. b is required.

The present invention has been made in view of the above circumstances, and has as its object to enable the inside of a mixer to be sufficiently cleaned with a small number of nozzles.

[0010]

A mixer cleaning apparatus according to the present invention.
Is the collected water from the recovered water tank and the
Integrated with a water weighing hopper designed to receive water
And a level detector for the washing water from the fresh water tank.
A washing water measuring hopper which can be measured by
While receiving the wash water measured by the clean water measuring hopper,
Washing so that washing water can be measured by a level detector
A water receiving hopper, a cleaning pump that pressurizes and discharges the cleaning water from the cleaning water receiving hopper to a high pressure, and a nozzle body that is disposed in the mixer and that sprays the cleaning water from the cleaning pump has one axis. And a plurality of fixed rotating nozzles that revolve around and rotate around another axis perpendicular to the axis.

[0011]

According to the present invention, the fresh water from the fresh water tank is combined with the washing water.
And supplied to the washing water weighing hopper.
The washing water measured by the level detector is
And the level of the washing water in the washing water receiving hopper is detected.
It is measured by a vessel, pressurized by a washing pump, fed to a rotating nozzle, and sprinkled at high pressure into the mixer from the body of the rotating nozzle.

[0012]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show an embodiment of a mixer cleaning apparatus according to the present invention, in which 1 is a mixer such as a twin-screw mixer, and 2 is a mixer 1.
There are a plurality of known rotary nozzles arranged in the upper part of the inside, and as shown in FIG.
The horizontal axis 2 and the casing 2b which is adapted to rotate relative to hollow longitudinal axis 2a by _1, the connected and Shimizu W ₁ to perpendicular to the horizontal axis 2c attached to the casing 2b
a plurality of nozzle arms 2d capable of rotating with respect to c
When provided with a nozzle body 2e provided at the tip of the nozzle arm 2d, the nozzle body 2e is configured to revolve relative to the axis l ₁ of the longitudinal axis 2a of the longitudinal axis 2a of the horizontal axis 2c orthogonal to the axis l ₁ and it is able to rotate with respect to the axis l _2.

When the mixer 1 is, for example, a two-axis mixer, one rotary nozzle 2 is provided at each diagonal end of each axis, for a total of two.
Are provided.

Reference numeral 3 denotes a recovered water tank capable of storing recovered water W ₂ such as supernatant water, 4 a fresh water tank capable of storing fresh water W ₁ , and 5 a collected water W ₂ and fresh water W ₁ . A water weighing hopper 6 for measuring the weight of the water W ₃ , which is provided with a level detector 8 for detecting the level of the supplied fresh water W ₁ and integrally connected to the water weighing hopper 5 via a bracket 7 The total weight of water in the water measuring hopper 5 and the fresh water measuring hopper 6 can be measured by a load cell (not shown).

The recovered water tank 3 and the water weighing hopper 5 are connected by a pipe 10 provided with a control valve 9 such as a solenoid valve in the middle. The fresh water tank 4 and the water weighing hopper 5 are connected in the middle with a control valve 11. The fresh water tank 4 and the fresh water measuring hopper 6 are connected by a pipe 14 provided with a control valve 13 in the middle, and the fresh water measuring hopper 6
Is connected to a conduit 16 provided with a control valve 15 in the middle.

Reference numeral 17 denotes a pipe line 16 at the lower part of the fresh water measuring hopper 6.
A fresh water receiving hopper provided below and provided with a level detector 18 for detecting the level of the supplied fresh water W ₁ .
A control valve 19 and a washing pump 20 such as a high-pressure plunger pump are provided in the middle part, and a pipe line 21 whose leading end is connected to the hollow longitudinal axis 2 a of the rotary nozzle 2 is connected. Further, a pipe 23 having a control valve 22 in the middle thereof is connected to the fresh water tank 4, and the tip of the pipe 23 is connected between the control valve 19 of the pipe 21 and the washing pump 20.

Next, the operation of the present invention will be described.

(I) When the mixer 1 is automatically cleaned. First, the operation panel in the mixer chamber is operated to switch the cleaning mode to automatic cleaning in advance. When the mixer 1 issues a command to mix the ready-mixed concrete this time, an open command is given to the control valve 9 or the control valve 11, and an open command is also given to the control valve 13 so that each of the control valves 9 or the control valves is controlled. 11 opens and the control valve 13 also opens. For this reason, the recovered water W ₂ in the recovered water tank 3 is sent from the pipe 10 to the water measuring hopper 5,
The fresh water W ₁ in the fresh water tank 4 is supplied from a pipe 12 to a water weighing hopper 5, and is supplied from a pipe 14 to a fresh water weighing hopper 6.
Sent to

When the level of fresh water W ₁ in the fresh water measuring hopper 6 reaches the upper limit, the control valve 13 is closed by a close command from the level detector 8. Also, after the control valve 13 is closed, when the sum of the weight of the water W ₃ in the water weighing hopper 5 and the weight of the fresh water W ₁ in the fresh water weighing hopper 6 reaches a preset weight and the load cell detects the set weight. Then, a close command is given to the control valve 9 or the control valve 11, and the control valve 9 or the control valve 11 is closed.

When the control valves 9, 11, and 13 are closed, a control valve (not shown) below the water weighing hopper 5 and a control valve 15 below the fresh water weighing hopper 6 open, and the water W ₃ from the water weighing hopper 5 opens. Is introduced into the mixer 1, and the fresh water W ₁ in the fresh water measuring hopper 6 is introduced into the fresh water receiving hopper 17 from the pipe 16. When the water measuring hopper 5 is empty, the control valve below the water measuring hopper 5 is closed. Closes. When the level of the fresh water W ₁ in the fresh water receiving hopper 17 reaches the upper limit, the level detector 18
Is given to the control valve 19, the control valve 19 is opened, and when the opening of the control valve 19 is detected by an open detector such as a limit switch, a start command is given to the cleaning pump 20 to perform cleaning. The pump 20 is started, and the fresh water W ₁ in the fresh water receiving hopper 17 is supplied from the pipe 21 to the washing pump 20.
, Which is pressurized to a high pressure and fed through the pipeline 21 to the rotary nozzle 2 side, where the hollow longitudinal axis 2a of the rotary nozzle 2
From the nozzle body 2e, the nozzle arm 2d is rotated with respect to the vertical plane, and the nozzle body 2e is sprinkled with high pressure into the mixer 1 to clean the mixer 1. . Mixer 1
Washed with fresh water W ₁ of, not to use the recovered water W ₂ is the use of recovered water W _2, foreign substances contained therein is because there is a possibility that clog the nozzle.

The [0022] level detector 18, when Shimizu W ₁ in the receiving Shimizu hopper 17 is detected to be empty, the control valve 19 close instruction is given to the control valve 19 is closed,
At the same time, a stop command is given to the cleaning pump 20, and the cleaning pump 20 stops.

The water that has washed the inside of the mixer 1 is used as kneading water for kneading the next ready-mixed concrete without being drained. In the case of automatic cleaning, the control valve 22 is always closed.

(II) When the mixer 1 is manually cleaned. First, the operation mode is switched to manual cleaning in advance by operating the operation panel in the mixer room. When an open command is given to the control valve 22 by pressing the push button switch, the control valve 22
When the opening of the control valve 22 is detected by the open detector, a start command is given to the washing pump 20, and the fresh water in the fresh water tank 4 passes through the pipes 23 and 21 to the washing pump 20. After being sucked and pressurized, it is supplied to the rotary nozzle 2 via the pipe line 21, and is sprinkled into the mixer 1 from the nozzle body 2 e of the rotary nozzle 2. When the push button switch is pressed again, the control valve 22 closes and the cleaning pump 20 also stops. The water after washing is discarded outside the mixer 1. At the time of manual cleaning, the control valve 19 remains closed.

As described above, in the embodiment of the present invention, since the mixer 1 is cleaned using the high-pressure cleaning pump 20 and the rotary nozzle 2, the inside of the mixer 1 is surely cleaned with a small number of nozzles. Since the water after washing can be used for kneading the ready-mixed concrete, the amount of water consumption can be reduced.

In the embodiment of the present invention, the case where the plunger pump is used as the cleaning pump has been described. However, the high pressure pump is not limited to the plunger pump, and the rotary nozzle may have any conventionally known structure. However, it can be used, the mixer to which this cleaning device is applied is not limited to the twin-screw mixer, and the water weighing hopper and fresh water weighing hopper can be installed separately without being connected together. The washing water sprinkled in the mixer may be water other than fresh water such as recovered water as long as it does not contain foreign matter, and other various changes may be made without departing from the scope of the present invention. Of course, it is.

[0027]

According to the mixer cleaning device of the present invention, Miki
In addition to the fact that cleaning of the inside of the
Water after washing can be used for kneading ready-mixed concrete
Resources can be saved, and a part of fresh water is measured and washed.
Efficient cleaning with a small amount of water to use as purified water
And the washing water weighing hopper is
It is connected to the hopper and the rotary nozzle is fixed
The entire configuration is simple because it is
And various other excellent effects.

[Brief description of the drawings]

FIG. 1 is a flow system diagram of one embodiment of a mixer cleaning device of the present invention.

FIG. 2 is a front view of a rotary nozzle applied to the mixer cleaning device of the present invention.

FIG. 3 is a flow diagram of an example of a conventional mixer cleaning apparatus.

FIG. 4 is a flow system diagram of another example of the conventional mixer cleaning apparatus.

[Explanation of symbols]

Reference Signs List 1 mixer 2 rotating nozzle 2e nozzle body 6 fresh water measuring hopper (washing water measuring hopper) 17 fresh water receiving hopper (washing water receiving hopper) 20 washing pump l ₁ axis l ₂ axis W ₁ fresh water (washing water)

Claims (1)

(57) [Claims] Claims: 1. Recovered water from a recovered water tank and fresh water tank
Integrated with a water weighing hopper that can receive fresh water from
And the washing water from the fresh water tank
Wash water weighing hopper that can be weighed by a bell detector
And the washing water measured by the washing water measuring hopper.
So that the washing water can be measured with a level detector.
A washing water receiving hopper, a washing pump that pressurizes and discharges washing water from the washing water receiving hopper to a high pressure, and a nozzle body that is disposed in the mixer and sprays the washing water from the washing pump. A plurality of solid orbits revolve around an axis of one and revolve around another axis orthogonal to the axis.
And a rotary nozzle provided.