JP4129869B2 - Concrete, building materials, residual soil processing mixer - Google Patents

Description

The present invention belongs to a technical field regarding concrete building materials and remaining soil processing mixer.

In the production of ready-mixed concrete, concrete secondary products and building materials, and residual soil treatment, a mixer (mixer) that mixes cement and other solidification materials with gravel and other mixed materials is used, but the solidification material is often powder. For example, in the case of ready-mixed concrete, when water, cement or gravel is thrown into the mixer, a large amount of dust must rise and be treated.
Conventionally, dust processing of concrete mixers and the like has been presented in Patent Document 1 and the like, and as shown in FIG. 1, a duct b is provided on the upper part of the mixer a so that the soaring dust passes through the filter c and only air. The cement powder d collected in the filter c was returned to the mixer a by a screw conveyor e, etc., but the filter of the dust collector of the mixer was clogged when there was a lot of moisture, and the filter was always replaced. Especially in the Tohoku / Hokkaido area, steam is supplied into the mixer to adjust the temperature when mixing concrete, and the dust collector sucks the steam and the filter clogs the cement, causing the dust collector to be used. In order to avoid this problem, a special filter is used, but this also has a limit, and dust collection cannot be performed. In order to prevent dust from getting out of the mixer, sealing the mixer will increase the pressure in the mixer and increase the pressure in the mixer when adding mixed materials such as cement and gravel. There was a problem that the introduction of materials with light specific gravity etc. was hindered

Therefore, the present inventor has a duct provided above the mixer powder solidified material inlet is at the top, the duct absorbs a mixer inside the dust and air connecting the bag member telescopic to be discharged, Proposed dust removal equipment for concrete, building materials, and residual soil processing mixers equipped with a pressure control mechanism that forcibly controls the internal volume of the bag member in conjunction with the operation of the mixer to make the air pressure in the mixer almost constant (Patent Document 2).
Japanese Patent No. 2864341 JP 2001-353712 A

However, the dust removing device of the mixer disclosed in Patent Document 2 described above has been a hindrance to monitoring when dust is drifted like smoke in the mixer and a monitoring camera is installed to observe the inside. Moreover, in the normal dust removal apparatus, the atmospheric | air pressure in the mixer came to fall, and it became the cause which obstructs the precision of the measuring instrument installed in the upper part of the mixer.
The present invention has been made in view of the above problems, and the problem is that dust is not released to the outside, the air pressure in the mixer can be made constant, and the air in the mixer can be and to provide a cleaned to thereby enabling observation by the monitoring camera concrete building materials and remaining soil processing mixer.

In order to solve the above-mentioned problem, the invention of claim 1 is a sub-dust collector that is provided with a powder solidifying material inlet and a weighing hopper at the top, and sucks dust floating inside the mixer and always cleans it with a filter. And a mixer equipped with a surveillance camera ,
A duct is provided in the upper part of the mixer, and the duct is connected to a main dust collecting device composed of an elastic bag member that absorbs and discharges dust and air inside the mixer, and a switching damper is provided in the duct. a said switching damper mixer interior and the outside air or bag member or to have a switching means so as to communicate with the concrete building materials and remaining soil processing mixer according to claim.
According to a second aspect of the present invention, there is provided a mixer provided with a powder solidifying material inlet and a weighing hopper at the top, and provided with a dust collecting device and a monitoring camera for sucking dust floating inside the mixer and always cleaning the dust with a filter. In
A duct is provided in the upper part of the mixer, and the duct is connected to a main dust collecting device composed of an elastic bag member that absorbs and discharges dust and air inside the mixer, and the bag member is operated for the mixer. A pressure control mechanism is provided for forcibly controlling the internal volume in conjunction with the air pressure in the mixer so that the air pressure in the mixer is substantially constant. A switching damper is provided in the duct. a concrete building materials and remaining soil processing mixer, characterized in that have a switching means to crab communicates.

According to the present invention, in the mixer having the powder solidifying material inlet at the top, a duct is provided at the top, and the duct is connected to an extendable bag member that absorbs and discharges dust and air inside the mixer. Because it is a dust collector, it does not require large electric power or a long processing time compared to the single use of a conventional filter-type dust collector, and the filter can be used regardless of clogging, and maintenance is simplified. Even after the absorption of the dust in the main dust collector is finished, smoke-like dust drifts in the mixer. This relatively small amount of dust is removed from the sub-dust collector 7, and the switching damper is used at that time. As a result of the operation of No. 6, dust flowing like smoke is quickly removed by letting outside air flow into the mixer.
Therefore, the air in the mixer is cleaned, the cement kneading state and the discharge state in the mixer can be clearly monitored in a short time by the monitoring camera, and the sub-dust collector 7 always sucks the air in the mixer. Therefore, dust does not spout out of the mixer and the inside of the plant can be kept clean.
If the air pressure in the mixer fluctuates, the load cell of the measuring instrument communicating with the mixer may malfunction, but the air pressure in the mixer is substantially the same as the atmospheric pressure by the operation of the switching damper 6. Therefore, since it does not affect the measurement of the measuring device on the mixer at all, no measurement error occurs.

The present invention realizes that the outside air is taken in by the duct switching damper when the mixer is in operation, and that the inside of the mixer can be cleaned and monitored in combination with the sub dust collector, and the outside air pressure and the inside of the mixer can be monitored. It was made possible to maintain the accuracy of the measuring instrument by making the pressure of the same.

Here, one example of the applied mixer to a suitable concrete mixer (mixer) in the present invention will be described with reference to the drawings.
Referring to FIG. 1, a stirring blade (not shown) that is rotated by a motor 11 is provided inside the main body of the mixer 1 in FIG. An input port 2 for powdered solidified material such as cement, a mixed material input port 3 such as gravel and sand, and a liquid input port 4 such as water are provided. A solidifying material metering hopper 21 is connected to the solidifying material inlet 2, and similarly, a measuring hopper 31 is connected to the mixed material inlet 3, and the liquid inlet 4 is connected to an opening / closing stopper 41. It is connected to the water tank.
In addition, a duct 52 is provided on the inner wall of the upper part 12 of the main body 1 of the mixer 1 so as to be connected to the elastic bag member 51 of the main dust collecting device 5. The bag member 51 is fed into the mixer 1 with a cloth air filter, for example. It has a capacity that can cover the volume of the raw material, and is installed to expand and contract when the raw material is fed into the mixer 1 and the mixed product is discharged.

As shown in the enlarged view of FIG. 2, a switching damper 6 is provided in the middle of the duct 52. The switching damper 6 has a bag-side opening 61 communicating with the main dust collecting device 5 and an outside air-side opening that is released to the outside air. A damper plate 63 that is provided with a portion 62 and rotates about a rotation shaft 64 is configured to be operated by a solenoid 65 or the like so as to release one of the openings 61.62 and close the other.
Furthermore, a relatively small-capacity sub-dust collector 7 is provided on the inner wall of the upper part 12 of the main body of the mixer 1 so that it always operates. The opening 71 of the sub-dust collector 7 and the collected cement are mixed with the mixer 1. An opening 72 for returning to the main body is provided, and dust drifting like smoke is sucked into the sub-dust collector 7 in the mixer, and the sub-dust collector 7 is separated into air and cement by a filter (not shown), Is discharged out of the sub-dust collector 7, and the cement is returned from the opening 72 to the main body of the mixer 1 by the feeder 73.
A monitoring camera 8 is provided on the inner wall of the upper portion 12 of the main body of the mixer 1 and is installed to monitor the cement kneading state.
When the mixing machine is operated and the mixed product is finished, the mixed product is discharged from the discharge port 9 to the storage hopper 91 and stored.

Here, another embodiment of the main dust collector 5 will be described with reference to FIG. Since the configuration other than the main dust collector 5 is the same as that of the first embodiment, the description thereof is omitted.
In FIG. 3, cement powder and dust from the duct 52 are absorbed and discharged by the telescopic bag member 51a of the main dust collecting device 5a, and the pressure in the mixer 1 is controlled by forcibly controlling the bag member 51a. A pressure control mechanism that actively controls the pressure control mechanism is provided. The pressure control mechanism forcibly controls the bag member 51a to expand and contract, and the expansion and contraction operation device 52a according to the input time and the discharge time. The structure is controlled by a control device 53a that controls the program, that is, the bag member 51a is forced to control the internal volume in conjunction with the operation of the mixer 1 so that the pressure in the mixer 1 is constant. .
The configuration of the telescopic operation device 52a includes a suspension arm 521a that suspends the top 511a of the telescopic bag member 51a, and a cylinder 522a that forcibly raises and lowers the suspension arm 521a by the control device 53a. Further, the height of the adjustment frame body 523a itself, to which the suspension arm 521a and the cylinder 522a are attached, is adjustable with respect to the base frame body 524a, and can be adapted to various sizes of bag members 51a. Has been.
In addition, when the bag member 521a expands and contracts, that is, when the mixed material such as cement, gravel, and water is added, the internal pressure of the mixer 1 increases, and when the concrete product is discharged from the mixer 1, the internal pressure decreases. The cylinder 522a may be moved up and down to change the internal volume of the bag member 51a so that the pressure in the machine 1 becomes constant.

Then, during the raw material charging time, the cylinder 522a is operated in the contracting direction, the suspension arm 521a is rotated around the rotation fulcrum 525a, and the top portion 511a is lifted to approach the state of the solid line in FIG. Therefore, the air containing the dust from the mixer 1 is strongly discharged from the mixer 1 and moved to the bag member 51a. At this time, materials having different specific gravities from gravel, sand, solidified material, and the like can be simultaneously introduced, and the material introduction is completed in a short time.
On the contrary, the discharge time of the raw material operates in the direction in which the cylinder 522a extends and approaches the state of the dotted line in FIG. 4, but the internal volume of the bag member 51a is also forcibly reduced, and the bag is set to keep the air pressure in the mixer constant. air and dust member 51a is moved into the mixer 1, Oite in a short time also the first embodiment completes the discharge, in time cement poured from the bag member 51 to the mixer 1, the pressure slightly Although the pressure is reduced, particularly in the second embodiment , since the air is forcibly sent into the mixer 1 at the time of cement injection from the bag member 51a , the pressure in the mixer 1 can be maintained almost constant, and various devices And instrument operation is more stable, dust can be processed in a short time, and overall operation time can be shortened.
That is, if the air pressure in the mixer 1 fluctuates, the weighing hoppers 21 and 31 communicating with the upper part of the mixer 1 may greatly move up and down due to fluctuations in the atmospheric pressure, and the load cell as a measuring device may malfunction. By operating the switching damper 6, the air pressure in the mixer can be kept substantially the same as the atmospheric pressure, so that fluctuations in the atmospheric pressure can be kept small. Does not affect the measurement, so weighing errors will not occur.
The bag member 51a may be a sealed sheet material, but if it is made of cloth through which only air passes, it functions as a filter, and when cement or raw material is charged, air is forcibly discharged to the outside through the cloth. Construct a good filter.

Here, the process of manufacturing the concrete product will be described along the time chart of FIG. 4. First, the process will be described in order from the [cement input] in the operation state of the mixer in FIGS. 2 to 3.
(1) At the start of charging cement, gravel, water, etc. First, the concrete production process will be explained. First, cement is fed into the mixer (mixer) 1 from the inlet 2 and mixed materials such as gravel and sand are charged into the inlet 3. Thus, a predetermined amount of water is introduced from the liquid inlet 4 through the weighing hoppers 21, 31 and the like, and there is no place for the air in the mixer 1, but the main dust collector 5 starts to suck and rises. At the same time, the switching damper 6 causes the inside of the main body of the mixer 1 to communicate with the main dust collector 5, and the damper plate 63 closes the outside air side opening 62 to block outside air.
When the mixed material is introduced to absorb the volume, air containing dust moves to the bag member 51 of the main dust collector 5 through the duct 52, and the volume of the bag member 51 is increased by the air. At this time, some air is discharged to the outside from the cloth of the bag member 51, but the cement dust is larger than the cloth and thus is not discharged to the outside.
At this time, the weighing hopper 31 does not measure cement, and the sub-dust collector 7 is in operation. Therefore, the air containing most of the dust moves to the bag member 51 of the main dust collector 5, so that the amount of air passing through the filter of the sub dust collector 7 is small as a matter of course. Less.
(2) Completion of cement, gravel, water, etc., and start of mixing of mixed materials After completion of cement, gravel, water, etc., the bag member 51 of the main dust collector 5 is inflated and the upper part is maintained at the upper position for inhalation. The damper plate 63 of the switching damper 6 rotates clockwise about the rotation shaft 64 to release the outside air side opening 62 and close the bag side opening 61 to close the main body and the main body of the mixer 1. The dust collector 5 is shut off, the main body of the mixer 1 and the outside air side opening 62 are communicated, and the mixer is operated to start kneading cement.
At this time, measurement of cement, gravel and the like with the weighing hopper 31 is started, and the sub-dust collector 7 is maintained in an operating state. At this time, since the mixer first body and the outside air-side opening 72 is in communication, mixer dust drifting like smoke flows into fresh outside air to the interior of the mixing machine 1 main body is removed quickly, the large The air containing the dust in the part can be monitored by the monitoring camera 8 in combination with the movement to the bag member 51 of the main dust collector 5 .

(3) material kneading (concrete products) kneading is completed discharge start mixing materials, when mixed concrete product is discharged from the discharge port 9, a damper plate 63 of the switching damper 6 is rotated counterclockwise Then, the outside air side opening 62 is closed, the bag side opening 61 is released, the inside of the main body of the mixer 1 and the main dust collector 5 are communicated, and the cement collected in the main dust collector 5 is mixed with the mixer 1. Discharge into the body.
At this time, at the time of discharging the mixed product, air corresponding to the volume of the discharged product is required, and the air to be supplied for this purpose is that the air of the bag member 51 and the dust move into the mixer 1, so the volume of the bag member 51 is The bag member 51 shrinks naturally and the upper part is maintained at the lower position to stop discharging.
That is, when the mixed material is charged or discharged, the air in the mixer (mixer) 1 moves alternately between the mixer 1 and the bag member 51 via the duct 52, so that new air in and out of the mixer can be minimized. It becomes the structure which can do and does not let dust out of the mixer 1.
In addition, since the cement powder, which is dust from the bag member 51 returned to the mixer 1 at the time of discharge, is very small compared to the volume of the product, there is no effect on the concrete product, and the dust dispensing device and work Is unnecessary.
At this time, the weighing of the cement by the weighing hopper 31 is continued as necessary, and the valve 73 of the sub-dust collector 7 is always operating, and the monitoring by the monitoring camera 8 is also continued.
(4) At the time of cement addition When the kneaded cement discharge is completed, the discharge valve is closed and the second round of concrete production starts again. However, the mixing material such as cement starts to be input and the operation returns to the previous (1). . Note that the sub-dust collector 7 is always operated to make the state in the mixer 1 transparent so that monitoring by the monitoring camera 8 is possible.

[Activation]
In the operation of the embodiment, in the mixer having the powder solidification material inlet at the upper part, a duct is provided at the upper part, and an elastic bag member that absorbs and discharges dust and air inside the mixer 1 is connected to the duct. Because it is the main dust collector 5,5a, it does not require large electric power compared to the filter type dust collector, and can collect dust in a short time and can be used regardless of clogging of the filter. Yes, maintenance becomes easy. In addition, even after the absorption of the dust in the main dust collectors 5 and 5a is finished, the dust drifts like smoke in the mixer. The drifting relatively small amount of dust is removed from the sub-dust collector 7, but when the switching damper 6 is operated, the inside of the mixer communicates with the outside air, so that the dust drifting like smoke is quickly removed. And since the subdust collector 7 is always attracting | sucking the air in a mixer, dust does not jet out of a mixer and the inside of a plant can be kept clean. Further, since the sub-dust collector 7 mainly removes dust drifting like smoke in the mixer 1, it is smaller than a conventional large filter dust collector and has a small capacity dust collector. In time, it is economically advantageous.
Therefore, the air in the mixer 1 is purified, and the kneading state and the discharging state of the cement in the mixer by the monitoring camera 8 can be clearly monitored.
In addition, if the air pressure in the mixer 1 varies, the load cell of the measuring instrument communicating with the mixer may malfunction, but the conventional mixer usually has a mixer by the operation of the switching damper 6. Although the pressure fluctuation occurs when the raw material is replaced without opening the inside to the outside air, in this embodiment, the air pressure in the mixer can be kept substantially the same as the atmospheric pressure. There is no measurement error because it does not affect the measurement of a certain measuring instrument.

  Of course, as long as the features of the present invention are not impaired, the present invention is not limited to the above-described embodiment, and used for a concrete mixer as a dust removing device, but for building materials for mixing wall materials, floor materials, etc. You may use for a mixing machine for the residual soil process which mixes a residual soil and a solidifying agent.

It is explanatory drawing which shows the outline of the mixer of the Example of this invention. It is a cross-sectional enlarged view of the switching damper of FIG. It is explanatory drawing which shows the outline of the mixer of the 2nd Example of this invention. It is a concrete mixer (mixer) time chart of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mixer (main body), 11 ... Motor, 12 ... Upper part of mixer 2 ... Solidification material inlet, 21,31 ... Measuring hopper, 3 ... Mixed raw material inlet 4 ... Liquid inlet, 41 ... Opening stopper 5, 5a ... main dust collector, 51, 51a ... bag member, 511a ... top,
52a ... telescopic actuator, 521a ... hanging arm, 522a ... cylinder
523a ... Adjustment frame, 524a ... Base frame, 525a ... Rotation fulcrum, 573a ... Control device
52 ... Duct 6 ... Switching damper, 61 ... Bag side opening, 62 ... Outside air side opening, 63 ... Damper plate,
64 ... Rotating shaft, 65 ... Solenoid 7 ... Sub-dust collector, 71,72 ... Open, 73 ... Screw conveyor 8 ... Monitoring camera 9 ... Mixed product outlet
91 ... Storage hopper

Claims (2)

In a mixer provided with a powder solidifying material inlet and a weighing hopper at the top, and provided with a sub-dust collector and a monitoring camera that sucks dust floating inside the mixer and constantly cleans it with a filter .
A duct is provided in the upper part of the mixer, and the duct is connected to a main dust collecting device composed of an elastic bag member that absorbs and discharges dust and air inside the mixer, and a switching damper is provided in the duct. , said switching damper mixer interior and the outside air or concrete building materials and remaining soil processing mixer, characterized in that have a switching means so as to communicate with or bag member. In a mixer provided with a powder solidifying material inlet and a weighing hopper at the top, and provided with a dust collector and a monitoring camera that sucks dust floating inside the mixer and constantly cleans it with a filter ,
A duct is provided in the upper part of the mixer, and the duct is connected to a main dust collecting device composed of an elastic bag member that absorbs and discharges dust and air inside the mixer, and the bag member is operated for the mixer. A pressure control mechanism is provided for forcibly controlling the internal volume in conjunction with the air pressure in the mixer so that the air pressure in the mixer is substantially constant. A switching damper is provided in the duct. concrete building materials remaining soil processing mixer, characterized in that have a switching means to crab communicates.

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