JP2004122051A - Self-propelling screw type continuous mixing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To continuously produce a concrete mixture at a desired place by simple constitution so as to be capable of controlling the production quantity per a unit time thereof. <P>SOLUTION: A self-propelling type vehicle 1 is loaded with a screw type continuous mixing apparatus 10 wherein a screw 20 is rotatably provided in a cylindrical screw casing 11. A small diameter spiral rotary blade 23, a large diameter spiral rotary blade 24, propeller-like blades 25 and spirally rotary blades 26 are successively provided to the rotary shaft 21 of the screw 20 along the longitudinal direction thereof in a screw feed direction. A mixing material such as rubble or the like charged from the material supply port 12 on the side of the small diameter spiral rotary blade 23 is sent toward the large diameter spiral rotary blade 24 and sent to the propeller-like blades 25 along with the cement charged from a material supply port 14. The mixing material and the cement are mixed with water charged from a material supply port 16 and the concrete mixture is discharged continuously from the side of the spiral rotary blades 26. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for carrying and mixing using a screw, and more particularly to a technique for moving to a desired place and mixing materials.
[0002]
[Prior art]
In the fields of construction and civil engineering, mixing of concrete materials has been performed using a gravity mixer, a batch mixer, a paddle mixer, or the like.
[0003]
In a batch mixer, each material to be mixed is weighed and put into a mixer for mixing. In a gravity mixer, a partition plate is provided in a box, and the materials are mixed from above by charging the material from above. In the paddle type mixer, the two-axis paddle is rotated in the opposite direction, and the input materials are mixed by scooping.
[0004]
The above-mentioned batch mixer belongs to batch processing as a processing method, and is not a processing method in which a concrete material is continuously mixed while a material is continuously supplied. In such a batch processing method, it is generally difficult to ensure the mixing quality for each batch processing, and it is necessary to perform measurement or the like for each processing as compared with the continuous mixing method, and the working efficiency is inferior to the continuous mixing method.
[0005]
As the continuous mixing method, there are the above-mentioned gravity type mixer and paddle type mixer.However, in the gravity type mixer, non-uniform mixing occurs due to adhesion of fine aggregates to the partition plate and the mixing quality is constant. In addition, it has been pointed out that the paddle type mixer has a relatively large scale and is open type, so that dust is generated during mixing.
[0006]
Therefore, a configuration different from the gravity type mixer and the paddle type mixer has been proposed, and a configuration in which continuous mixing is performed by using a screw has been proposed. For example, a screw for transferring the material to be kneaded supplied to the transfer casing from the raw material input port to the kneading casing, and a forcible transfer blade and a kneading blade installed in the kneading casing and coaxial with the transfer screw are provided. A configuration of a continuous mixing and kneading apparatus is known (for example, see Patent Document 1).
[0007]
Further, a configuration in which a screw conveyor is mounted on a self-propelled vehicle is known. That is, a configuration in which a hopper, a two-axis paddle, and a belt conveyor are mounted on a vehicle as a self-propelled mixing device is disclosed (for example, see Patent Document 2).
[0008]
[Patent Document 1]
JP-A-5-116734 (paragraph 0008, FIGS. 1 and 2)
[0009]
[Patent Document 2]
JP-A-2002-167799 (paragraph 0008, paragraph 0009, FIG. 1)
[0010]
[Problems to be solved by the invention]
Both the configuration of the batch type processing and the configuration of the continuous mixing type such as a screw conveyor device are both fixed and installed, and the movement cannot be basically easily performed after assembling the equipment.
[0011]
In an actual work site, it is desirable that the site where the mixture is used and the site where the mixture is manufactured are as close as possible.Moreover, on a large-scale site, the concrete placement site gradually moves, so that the concrete can be easily moved. There is a need for an apparatus for producing a mixture.
[0012]
In addition, such a movable concrete mixing apparatus performs a joint while moving a casting place, and therefore, it is difficult that the manufacturing quality is different every time the concrete is moved. Therefore, it is desirable to use a continuous mixing apparatus instead of a batch processing method.
[0013]
Furthermore, since it is fully assumed that the amount of concrete to be poured is different at the moving placing site, it is easy to control the production amount, that is, the production amount per unit time, in the continuous production of the concrete mixture. It is strongly desired that this can be done.
[0014]
However, the batch-type processing method described in the above-mentioned conventional technique cannot sufficiently cope with such a request, such as the necessity of weighing a material every time in addition to the production quality.
[0015]
On the other hand, a mixing device using a screw is considered to be capable of continuous mixing. However, in the configuration disclosed in Patent Document 1, in order to prevent the kneaded material from adhering in the kneading casing, the mixing device is provided immediately before the kneading blade. A special structure is adopted in which forced transfer blades are provided.
[0016]
In particular, when providing such forced transfer blades, the mounting pitch of the forced transfer blades is provided in the transfer casing so that the material to be kneaded can be sufficiently transferred into the mixing casing having a larger diameter than the transfer casing without delay. It is said that it is preferable to regulate the pitch of the transfer screw to 1/2 or less.
[0017]
In addition, it is described that the distance between the kneading blade and the forced transfer blade is preferably set to be equal to or less than the pitch of the kneading blade.
[0018]
The inventor of the present invention sets the pitch of the blades, adopts a complicated configuration such as changing the diameter of the transfer casing and the kneading casing, and adopts a simpler configuration of the mixture including the concrete mixture using the screw. I thought that continuous production would not be possible.
[0019]
An object of the present invention is to make it possible to produce a mixture including a concrete mixture at a moving destination continuously and with a simple structure so that the production amount per unit time can be adjusted while easily moving. It is in.
[0020]
[Means for Solving the Problems]
That is, the self-propelled screw-type continuous mixing device of the present invention includes a helical rotary blade as a rotary blade for transporting a mixed material, in which a screw rotary shaft rotatable by a driving unit is directed in a screw transport direction along a longitudinal direction thereof. And a screw in which a propeller-shaped rotary blade as a material mixing rotary blade is sequentially provided, a screw casing including the screw, and a material supply port provided in the screw casing, and rotated by the driving unit. And a self-propelled vehicle on which the screw-type continuous mixing device is mounted.
[0021]
The vehicle may be of a crawler type or a roller type, for example.
[0022]
In the configuration of the screw-type continuous mixing apparatus to be mounted, the spiral rotary blade means a rotary blade having a shape in which a blade surface is continuously formed with a spiral twist. The propeller-shaped rotary blade means a rotary blade having a twisted surface and a blade surface that is independent and formed by cutting into a plurality of blades.
[0023]
For the conveyance, the above-mentioned helical rotary blade having no cutting of the blade surface is preferable. In mixing, the blade surface is cut, and a plurality of independent-shaped propeller-shaped rotary blades can perform more sufficient mixing.
[0024]
In the conventional configuration of Patent Document 1 and the like, a configuration is provided in which a function difference between a transport rotary blade and a mixing rotary blade is provided by changing a twist state, but in the present invention, the same twist state is provided. While maintaining the above, the difference in the functions for conveyance and mixing is clarified depending on whether the blade surface is formed continuously or divided into a plurality of parts. In the method of changing the twist state, a subtle difference in the twist state must be ascertained by experiments, calculations, etc., in order to make a difference in the functions for transport and mixing, resulting in an extremely complicated configuration. .
[0025]
However, if the blade surface employed in the present invention has a continuous configuration or an independent configuration, a part of the spiral rotary blade is a spiral rotary blade in which the twist state is set to be constant. If the continuous blade surface is cut in the section, the propeller-shaped rotary blade composed of a plurality of independent blades can be easily manufactured continuously with the spiral rotary blade, and the manufacturing cost can be significantly reduced.
[0026]
In the configuration, the helical rotary blade is provided in the screw conveying direction along the longitudinal direction of the rotary shaft, and is provided following the small-diameter helical rotary blade provided on the rotary shaft and the small-diameter helical rotary blade. A large-diameter spiral rotary blade having a diameter larger than that of the small-diameter spiral rotary blade, and the inner diameter of the screw casing includes the large-diameter spiral rotary blade and the installation portion of the propeller-shaped rotary blade, respectively. The inner diameter is set to the same inner diameter up to the tip side in the screw transport direction, and the inner diameter of the screw casing portion provided with the small-diameter helical rotary blade is set to be smaller than the same inner diameter.
[0027]
Alternatively, in the above-described configuration, the spiral rotary blade is arranged in the screw conveying direction along the longitudinal direction of the rotary shaft, and the small-diameter spiral rotary blade provided on the rotary shaft and the small-diameter spiral rotary blade. The inner diameter of a screw casing portion provided with the large-diameter helical rotary blade having a diameter larger than that of the small-diameter helical rotary blade is provided. It is characterized by having.
[0028]
In the above configuration, the small-diameter helical rotary blade and the large-diameter helical rotary blade are provided at the same pitch with respect to the rotation axis.
[0029]
In any one of the above configurations, a screw casing portion provided with the spiral rotary blade and the propeller-shaped rotary blade is set to have the same inner diameter, and the spiral rotary blade and the propeller-shaped rotary blade are connected to the rotary shaft. It is characterized by being provided at the same pitch.
[0030]
In the state of being contained in the screw casing, when continuously producing a mixture while transporting the mixed material by screw rotation, the transport speed in the screw casing, the transport amount, and there is a part that is greatly different in the section. In addition, it is difficult to control the production amount by controlling the screw rotation due to various factors. In order to minimize the participation factor as much as possible, it is preferable to unify the inner diameter of the screw casing and unify the mounting pitch of the rotating blades.
[0031]
From this viewpoint, the present invention adopts a configuration in which the inner diameter of the screw casing and the mounting pitch of the rotating blades are set to be the same as in the above configuration.
[0032]
In any one of the above configurations, the material supply port is characterized in that a plurality of material supply ports of the same mixed material are provided at different positions along the longitudinal direction of the screw casing. Alternatively, in any of the above configurations, the material supply port is provided so as to be variable in position along a longitudinal direction of the screw casing.
[0033]
In the method in which the material is conveyed and mixed together by the rotating screw provided in the screw casing, the weight, bulk, etc. of the material are different for each material used, or the mixing ratio is increased even when the same material is used. When they are different, it is sufficiently assumed that the state of conveyance and the degree of mixing are slightly or greatly different.
[0034]
That is, in the screw-type continuous mixing apparatus having the above-described configuration, there is an appropriate position at which position in the entire process of the screw the material should be charged. Therefore, assuming that the mixing ratio or the like of the same material is changed, it is required to configure the material supply position so that the material supply position can be changed, and the configuration of the material supply port is employed in the present invention.
[0035]
In any one of the above configurations, a plurality of screws are provided in the same screw casing. In the conventional configuration, one screw is generally provided in one screw casing. However, in order to cope with an increase in the production amount, the installation is more difficult than in the case where a plurality of screw-type continuous mixing devices are juxtaposed. In terms of space and device configuration, a configuration in which a plurality of screws are provided in a single screw casing employed in the configuration of the present invention is more effective.
[0036]
The self-propelled screw-type continuous mixing device of the present invention includes a small-diameter helical rotary blade and a large-diameter helical rotary blade larger than the small-diameter helical rotary blade in a screw conveying direction along the longitudinal direction of the screw rotary shaft. , A propeller-shaped rotary blade and a helical rotary blade are sequentially provided at the same pitch, a screw, a cylindrical screw casing formed in a straight cylindrical shape having the same inner diameter and storing the screw, and provided on the screw casing. A plurality of material supply ports, and among the plurality of material supply ports, the material supply port provided on the installation side of the small-diameter helical rotary blade of the screw casing has the largest bulk of the mixed material. A screw-type continuous mixing device configured to feed and mix the material using the rotating screw, which is set for supplying the material having the largest bulk material, and the screw It may be configured to; and a self-propelled vehicle equipped with the formula continuous mixing device.
[0037]
When mixing materials having similar bulks and densities, there is not much problem.However, when mixing materials having greatly different bulks and densities while screw-conveying, as described above, the maximum bulk material is used. A configuration in which the mixed material is supplied first and then the other mixed material is supplied is particularly effective.
[0038]
For example, when considering the case of a concrete mixture such as CSG concrete, crushed stones and aggregates can be assumed as the largest bulk material, and other materials such as cement can be assumed. If the same material supply port is used later in the formula, sufficient mixing of the two cannot be expected.
[0039]
Furthermore, even if the powder is charged together from the same material supply port, the powder to be charged will be charged while adhering to the crushed stone having an uneven shape in an uneven state, and the crushed stone and the powder will not be mixed. It is conveyed and mixed in a uniform blending state, and it is not possible to secure a stable composition quality of a continuously produced concrete mixture.
[0040]
On the other hand, in a configuration in which the powder is supplied first and conveyed by screw, and then crushed stone or the like as the largest bulk material is supplied thereto, the powder easily accumulates downward, so that it is difficult to expect sufficient quantitative conveyance, and such mixing is difficult. The procedure does not ensure stable composition quality in the continuous production of concrete mixtures.
[0041]
The term “mixing” in the above configuration is used in a sense including kneading.
[0042]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0043]
(Embodiment 1)
FIG. 1 is a side view showing a self-propelled screw type continuous mixing apparatus of the present invention. FIG. 2 is a front view as viewed from the direction of the arrow in FIG. FIG. 3 is a plan view showing the self-propelled screw type continuous mixing apparatus shown in FIG. 1 as viewed from above.
[0044]
In the present embodiment, as shown in FIG. 1, a self-propelled screw type continuous mixing device 100 has a configuration in which a screw type continuous mixing device 10 is mounted on a vehicle 1. In the case shown in FIG. 1, the vehicle 1 is configured as a crawler type heavy equipment vehicle 1a (1). However, the vehicle 1 may have a configuration other than the crawler type heavy equipment vehicle 1a, such as a roller type heavy equipment. In short, any self-propelled vehicle that can move the screw-type continuous mixing device 10 to a predetermined place may be used.
[0045]
The crawler-type heavy equipment vehicle 1a rotates the crawler 4 provided on the idler wheel 3b and the drive wheel 3a by driving the drive wheel 3a by the engine-type oil unit 2, for example, as shown in FIGS. Thus, it can be moved according to the operation of the operator from the cab 5.
[0046]
As shown in FIG. 1, the screw-type continuous mixing apparatus 10 is supported by an arm 6 and a gantry 7 provided on a crawler-type heavy equipment vehicle 1a. If necessary, the screw type continuous mixing device 10 can be appropriately extended forward by extending the arm 6 hydraulically.
[0047]
Further, by rotating the gantry 7, the screw conveying direction of the screw type continuous mixing device 10 can be freely changed in the horizontal direction.
[0048]
As shown in FIG. 1, the screw-type continuous mixing apparatus 10 mounted on the self-propelled screw-type continuous mixing apparatus 100 has a screw 20 rotatably provided in a cylindrical screw casing 11. The distal end 11a side of the screw casing 11 is opened so that the mixture mixed and conveyed by the screw 20 can be discharged. That is, the screw conveyance direction is set toward the front end 11a.
[0049]
As shown in FIG. 2, the rotating shaft 21 of the screw 20 is rotatably supported by the bearing 21c of the rotating shaft supporting member 21b suspended from above the screw casing 11 at the tip 11a side, as shown in FIG. Have been.
[0050]
The rear end 11b side of the screw casing 11 is closed, and the rotation shaft 21 of the screw 20 is projected. As shown in FIGS. 1 and 3, the screw casing 11 may be formed to have the same diameter from the front end 11a to the rear end 11b. By employing such a configuration, the manufacturing cost of the apparatus can be significantly reduced as compared with a case where different diameter portions are provided in the middle of the screw casing 11.
[0051]
Of course, if it is not necessary to meet such a request, a configuration in which different diameter portions are provided in the middle of the screw casing 11 may be adopted.
[0052]
The rotating shaft 21 protruding from the rear end 11b side of the screw casing 11 is rotated by a rotation driving means 22 such as a motor, which can be adjusted in rotation speed. As the rotation drive means 22, for example, a motor capable of continuously changing the speed may be used.
[0053]
As shown in FIG. 1, the screw 20 moves in the screw conveyance direction indicated by the arrow and along the longitudinal direction of the rotating shaft 22 along the small-diameter spiral rotating blade 23, the large-diameter spiral rotating blade 24, and the propeller-shaped rotating blade. The blade 25 and the spiral rotary blade 26 are provided in order.
[0054]
The large-diameter helical rotary blade 24 is formed to have a larger diameter than the small-diameter helical rotary blade 23, and the inner diameter of the cylindrical screw casing 11 is set to a diameter that can accommodate the large-diameter helical rotary blade 24. ing.
[0055]
The small-diameter helical rotary blade 23 and the large-diameter helical rotary blade 24 function as mixed material transport rotary blades for transporting the mixed material. The propeller-shaped rotary blade 25 functions as a material mixing rotary blade for mixing the mixed material sent from the small-diameter spiral rotary blade 23 and the large-diameter spiral rotary blade 24 from behind.
[0056]
The helical rotary blade 26 provided in front of the propeller-shaped rotary blade 25 functions as a mixture-conveying rotary blade that feeds the mixture in which the materials are mixed by the propeller-shaped rotary blade 25 to the tip 11a side of the screw casing 11. I have.
[0057]
Further, the small-diameter helical rotary blade 23, the large-diameter helical rotary blade 24, the propeller-shaped rotary blade 25, and the helical rotary blade 26 are continuously provided on the rotary shaft 21 at the same pitch. A simpler configuration is employed without any change, and the cost of manufacturing the device is actively reduced.
[0058]
As shown in FIG. 1, the rear side of the screw casing 11 is an area provided with a small-diameter helical rotary blade 23 and a large-diameter helical rotary blade 24 as mixed material transport rotary blades for transporting the mixed material. I have.
[0059]
A material supply port 12 is provided in the screw casing 11 corresponding to an area where the small-diameter spiral rotary blade 23 is provided, and a hopper 13 is provided through the material supply port 12. From the hopper 13, a non-powder mixed material such as crushed stone and aggregate can be supplied.
[0060]
A material supply port 14 is provided in the screw casing 11 corresponding to the area where the large-diameter spiral rotary blade 24 is provided. With respect to the mixed material such as crushed stone sent by the small-diameter spiral rotary blade 23 provided at the rear, another mixed material different from crushed stone or the like can be introduced into the screw casing 11 from the material supply port 14. Has become.
[0061]
As shown in FIG. 1, between the installation area a of the small-diameter helical rotary blade 23 and the installation area b of the large-diameter helical rotary blade 24, a backflow is prevented in a substantially upper half side in the screw casing 11. The member 11c is provided so that the mixed material sent to the installation area b of the large-diameter spiral rotary blade 24 does not flow back to the installation area a of the small-diameter spiral rotary blade 24.
[0062]
From the center of the screw casing 11 to the tip side, the material sent from the large-diameter helical rotary blade 24 can be mixed, corresponding to the installation area c in which the propeller-shaped rotary blade 25 is provided.
[0063]
In the case shown in FIG. 1, the screw casing 11 corresponding to the installation area c of the propeller-shaped rotary blade 25 is provided with material supply ports 15, 16, 17 in order in the longitudinal direction, respectively. Can be supplied.
[0064]
Regarding the material supply ports 14, 15, 16, 17 described above, for example, assuming that a mixture of CSG concrete is manufactured, the material supply port 14 is used as a cement preliminary supply port, and the material supply port 15 is used as a cement supply port. The material supply port 16 may be set as a water supply port, and the material supply port 17 may be set as a water preliminary supply port.
[0065]
In this way, by setting one of the material supply ports 14 and 15 and one of the material supply ports 16 and 17 as a spare supply port, a plurality of material supply ports of the same material are secured, and When changing the rotation speed or the like, the position at which the mixed material is charged may be changed.
[0066]
For example, a hose may be connected to the material supply ports 14 and 15 with a cement storage device (not shown) so that the cement pressure can be supplied so that the supply amount can be adjusted by adjusting a valve or the like. In addition, the material supply ports 17 and 18 may also be connected to a water supply hose so that water can be supplied so that the amount of water supplied can be adjusted by, for example, adjusting a valve of a faucet or the like.
[0067]
As described above, the material supply ports 14 to 17 provided on the external material supply side and the screw casing 11 can be connected to hoses, so that the lid of the open system input port is opened and the material is supplied by a hopper or the like. Unlike the case where the supply is performed, scattering of the material can be reliably prevented. When supplying powder such as cement, scattering to the surroundings poses a problem. However, if the hose is supplied into the screw casing 11 as described above, such a problem of powder scattering can be solved.
[0068]
Further, the material supply port 16 set as the water supply port is provided with an injection nozzle 16a, and the nozzle end 16b side is connected to a water injection hose, so that the supply of water into the screw casing 11 is averaged. What is necessary is just to be able to perform in a sprinkling state. As the injection nozzle 16a, a commercially available nozzle, for example, a nozzle capable of spraying water almost uniformly in the entire circumferential direction from the end of the injection nozzle 16a may be used.
[0069]
In the configuration in which the materials are mixed while being conveyed by the screw 20, the mixing is different from the case of stirring and mixing in the same container. Therefore, a water supply method in a sprinkling state using such a nozzle is particularly effective.
[0070]
In addition, when it is not necessary to assume that the same material supply position is changed, even if the setting of the material supply ports 14 to 17 is set to different material supply ports without providing the preliminary supply port. I do not care. Further, the number of material supply ports is not limited to the configuration shown in FIG. 1, and the number of the material supply ports may be appropriately set according to the mixed material.
[0071]
In the screw casing 11, as shown in FIG. 3, as shown in FIG. 3, as shown in FIG. 3, in the installation area a of the small-diameter helical rotary blade 23, through the opening of the hopper 13. Through the hatch 18 provided on the upper surface of the casing 11, the content of the mixing state can be checked via the hatch 19 in the installation area c of the propeller-shaped rotary blade 25.
[0072]
An installation area d for the helical rotary blade 26 is provided ahead of the installation area c for the propeller-like rotary blade 25. The spiral rotary blade 26 has a function as a transport rotary blade, and sends a mixture obtained by mixing a plurality of materials by the rear propeller-shaped rotary blade 25 to the tip 11a side of the screw casing 11, and the tip 11a The mixture can be delivered from the side.
[0073]
1, the configuration of the screw 20 shows a case in which two small-diameter spiral rotary blades 23 and two large-diameter spiral rotary blades 24 are provided. Here, one spiral rotating blade is counted as one cycle of the locus of the outer periphery of the spiral rotating blade.
[0074]
In the case shown in FIG. 1, the propeller-shaped rotary blade 25 is formed in a propeller shape divided into three at 60 ° per cycle. Seven propeller-shaped rotary blades 25 are provided. In the case shown in FIG. 1, one spiral rotary blade 26 is provided.
[0075]
The mounting pitch of each of the small-diameter helical rotary blade 23, the large-diameter helical rotary blade 24, the propeller-shaped rotary blade 25, and the helical rotary blade 26 is the same pitch as shown in FIG. Is set. Such a configuration is preferable from the viewpoint of reducing the cost of manufacturing the apparatus. However, if it is not necessary to meet such a request, setting such as changing the mounting pitch for each rotating blade may be used.
[0076]
That is, the number of rotating blades and the pitch at which the blades are mounted need not be limited to the configuration shown in FIG.
[0077]
For example, in the configuration of the screw 20 shown in FIG. 4A, one small-diameter helical rotary blade 23, five large-diameter helical rotary blades 24, and a propeller-shaped rotary blade 25 are arranged at intervals of 60 ° per cycle. The figure shows a case where five are divided and two spiral rotary blades 26 are provided. In experiments, it was confirmed that such a configuration was sufficient for carrying and mixing. FIG. 4B schematically illustrates the shape of the propeller-shaped rotary blade 25 as a front view.
[0078]
In the configuration shown in FIG. 5A, three small-diameter helical rotary blades 23, one large-diameter helical rotary blade 24, seven propeller-shaped rotary blades 25, and one helical rotary blade 26 are provided. It has become. In the configuration shown in FIG. 5A, the propeller-shaped rotary blade 25 is formed into a shape divided into two parts, a small blade and a large blade, as schematically shown in FIG. 5B. The small blades and the large blades are set to have a facing edge angle θ of 60 °.
[0079]
In the above description, the case where it is assumed that crushed stones and the like are put into the screw casing 11 from the material supply port 12 via the popper 13 is shown, but for example, aggregates can be supplied by pressure feeding with a hose or the like. As shown in FIG. 6, the material input port 12 may be configured to be connected to a hose in the same manner as the material supply port 14 or the like. In the case shown in FIG. 6, the state in which the hoses 12a, 14a, 16c are connected to the material supply ports 12, 14, 16 is shown.
[0080]
In the above description, the case where the screw casing 11 is set to have the same inner diameter from the front end 11a side to the rear end 11b side in order to reduce the manufacturing cost of the apparatus has been described. As described below, a configuration in which different diameter portions are provided in the middle of the screw casing 11 as described below may be adopted.
[0081]
For example, only the portion corresponding to the installation area a of the small-diameter helical rotary blade 23 is set to a small diameter in accordance with the diameter of the small-diameter helical rotary blade 23, and the large-diameter helical rotary blade 24, The inside diameter in the screw casing 11 corresponding to each of the installation areas b, c, d of the propeller-shaped rotary blade 25 and the spiral rotary blade 26 is the same, for example, the same internal diameter matching the diameter of the large-diameter spiral rotary blade 24. You can set it to.
[0082]
As described above, if the side corresponding to the small-diameter helical rotary blade 23 is set smaller than the inner diameter of the subsequent large-diameter helical rotary blade 24 and thereafter, the small-diameter helical rotary blade 23 feeds crushed stones and the like. The quantity can be defined more accurately than without such a configuration.
[0083]
That is, the crushed stones and the like sent by the small-diameter spiral rotating blades 23 are basically sent by the blade surface of the small-diameter spiral rotating blades 23. However, in the case of an amorphous bulk material such as crushed stone, In various states, crushed stones are likely to form a lump in a state of being caught on each other. If there is a large space between the small-diameter helical rotary blade 23 and the inside of the screw casing 11, the lump may be sent as it is.
[0084]
Therefore, the inner diameter of the screw casing 11 corresponding to the installation area a of the small-diameter helical rotary blade 23 is changed to the large-diameter helical rotary blade 24, the propeller-shaped rotary blade 25, If the inner diameter of the screw casing 11 corresponding to each of the installation areas b, c, and d of the rotary blades 26 is set to be smaller than the same inner diameter, the feeding amount can be controlled with higher accuracy.
[0085]
(Embodiment 2)
In the present embodiment, a screw-type continuous mixing method using the screw-type continuous mixing device 10 described in the first embodiment will be described. In the description, CSG concrete will be described as an example.
[0086]
The self-propelled screw-type continuous mixing device 100 shown in FIG. Move.
[0087]
At the moving place, crushed stone as a mixed material of CSG concrete is charged from a hopper 13 provided in the screw type continuous mixing device 10 of the self-propelled screw type continuous mixing device 100. At the time of insertion, for example, the hopper 13 may be inserted with a backhoe or the like so that the inside of the hopper 13 does not become empty. The crushed stone input through the hopper 13 is naturally dropped into the installation area a of the small-diameter spiral rotary blade 23 provided on the rotary shaft 21 of the screw casing 11, and the feed amount is regulated by the small-diameter spiral rotary blade 23. You.
[0088]
The crushed stone put into the installation area a in this manner is installed in a state where the large-diameter helical rotary blade 24 is installed by the small-diameter helical rotary blade 23 of the screw 20 rotated by the rotary drive means 22 constituted by a motor or the like. It is transported to the area b.
[0089]
The crushed stone transported by the small-diameter helical rotary blade 23 is supplied with a necessary amount of cement from the material supply port 14 or 15 in the installation area b of the large-diameter helical rotary blade 24. When charging cement, a suction hose for charging may be connected to the supply port, and a constant amount may be supplied by a rotary feeder or the like. The input amount may be controlled by an inverter. By adopting such a charging method, the easily dispersed cement powder is not scattered to the surroundings at the time of supply.
[0090]
The amount of cement to be supplied can be charged at most to an amount substantially equivalent to the gap between the crushed stone transported into the installation area b and the screw casing 11.
[0091]
The cement put in the installation area b in the screw casing 11 in this way is transported together with the crushed stone sent from the rear into the installation area c in which the propeller-like rotating blades 25 are installed. The cement and the crushed stone transported into the installation area c are mixed by the propeller-like rotating blades 25.
[0092]
When it is necessary to change the cement supply position due to a difference in the rotation speed of the screw 20 or the particle size of the crushed stone, for example, a suction hose can be connected to the material supply port 15 without using the material supply port 14. Just fine. What is necessary is just to select the material supply position according to the mixing state of the concrete.
[0093]
In this way, on the rear side of the installation area c, the cement and the crushed stone are transported while being mixed in a dry state. When passing through the material supply port 16 side, water is uniformly sprayed from a nozzle 16 a provided in the material supply port 16.
[0094]
Cement and crushed stone that have been dry-mixed until then will be wet-mixed by watering. In this way, the mixture of cement and crushed stone is transported first while being wet-mixed. When it is necessary to change the water supply position, for example, the material supply port 17 may be used instead of the material supply port 16. The material supply port 17 may be configured so that, for example, the nozzle 16a is detachably provided so that a material other than water can be supplied as needed.
[0095]
The cement and the crushed stone wet-mixed by supplying the desired amount of water in this way are sufficiently mixed before passing through the installation area c and sent to the installation area d. In the installation area d, the helical rotary blade 26 is provided, and the helical rotary blade 26 forcibly conveys and extrudes the screw casing 11 to the opening side of the distal end 11a.
[0096]
An appropriate container such as a bucket may be prepared on the tip 11a side of the screw casing 11, and may receive CSG concrete continuously supplied from the tip 11a side of the screw casing 11.
[0097]
By using the screw-type continuous mixing device 10 according to the present invention described in Embodiment 1, CSG concrete can be manufactured continuously. Unlike the case of producing concrete by batch processing as in the past, it is not necessary to perform measurement of the mixed material for each batch processing, etc., to continuously produce the concrete mixture, stabilize the quality of the concrete mixture, It is possible to positively improve the efficiency of the manufacturing operation.
[0098]
The crushed stone, cement, and water of the mixed material of the CSG concrete may be continuously charged into the screw casing 11, respectively. The rotation speed of the screw 20 may be set to a number of revolutions corresponding to the mixing amount and the conveying amount, and the feed amount of the mixed material is appropriately adjusted by valve adjustment or the like in accordance with the rotation speed.
[0099]
In addition, if a flow meter that measures the amount of pressure feed is appropriately set in the material supply path, the supply amount can be read from the flow meter in real time.
[0100]
Therefore, without changing the supply ratio per unit time between the individual mixed materials, by increasing or decreasing the speed of material supply per unit time by adjusting the valve, the composition ratio of the mixed material can be reduced. Without changing, the production rate of the mixture per unit time can be adjusted.
[0101]
Alternatively, while maintaining a constant material supply, the rotation speed of the screw 20 may be reduced so that the mixture material in the screw casing 11 does not become empty, or increased so that the mixture material in the screw casing 11 does not clog. By doing so, the production amount of the mixture per unit time can be adjusted.
[0102]
In addition, when adjusting the production amount of the mixture per unit time, in the above description, the case where the material supply amount or the number of rotations of the screw is changed was described, but the supply speed of the material per unit time and It is a matter of course that the production amount of the mixture per unit time may be controlled by changing the rotation number of the screw while synchronizing it.
[0103]
For example, in advance, in consideration of the type of the mixed material and the mixed composition ratio, a combination of the optimum material supply speed and the number of rotations of the screw for the production amount of the mixture per unit time is programmed, and according to a site situation. The optimum combination may be selected by computer control in accordance with the production volume per unit time specified by the operator so that the production volume per unit time can be automatically adjusted appropriately.
[0104]
By continuously controlling the production amount of the mixture per unit time in this way, for example, without stopping the production of the concrete mixture, the supply amount can be reduced or increased depending on the situation of the concrete placing site. Can respond flexibly. Unlike the case where the rapid change of the concrete supply amount to the site has not been performed so far, the quick response can be performed.
[0105]
Therefore, the supply of concrete can be managed smoothly and appropriately, unlike the conventional case, so that the work efficiency at the site can be significantly improved.
[0106]
Furthermore, in the screw-type continuous mixing device 10 of the embodiment, since a plurality of material supply ports are provided in order in the screw conveying direction, it is effective for those in which the order of mixing is required at the time of material mixing. Can respond. That is, when it is necessary to mix the third mixed material after the first mixed material and the second mixed material are first mixed, the first mixed material is supplied from the material supply port 14, The second mixed material is supplied from the material supply port 15, and the two are mixed by the propeller-shaped rotary blade 25, and the third mixed material is supplied from the material supply port 17 in a mixed state, and the spiral rotary blade 26 is supplied. Can be supplied to the installation area d of the first, second, and third mixed materials.
[0107]
(Embodiment 3)
In the screw 20 according to the first embodiment, the small-diameter helical rotary blade 23 -the large-diameter helical rotary blade 24 -the propeller-shaped rotary blade 25 -the helical shape along the longitudinal direction of the rotary shaft 21 in the screw transport direction. Although the configuration in which the rotating blades 26 are provided in order has been described, in the present embodiment, as shown in FIGS. 7A to 7D, the screw 20 that can be applied to the screw-type continuous mixing apparatus 10 with a configuration other than the above configuration. A modified example will be described.
[0108]
That is, as shown in FIG. 7A, for example, a combination of a large-diameter helical rotary blade 24-a propeller-shaped rotary blade 25 may be employed as a combination of the rotary blade for conveying the mixed material and the rotary blade for mixing the material. I do not care.
[0109]
Alternatively, as shown in FIG. 7B, as a combination of a rotating blade for conveying the mixed material-a rotating blade for mixing the material, a combination of a small-diameter spiral rotating blade 23, a large-diameter spiral rotating blade 24, and a propeller-shaped rotating blade 25 is provided. Can also be adopted.
[0110]
Alternatively, as shown in FIG. 7C, as a combination of a rotating blade for transporting the mixed material, a rotating blade for mixing the material, and a rotating blade for transporting the mixture, for example, a large-diameter spiral rotating blade 24-a propeller-shaped rotating blade 25- A combination of the spiral rotating blades 26 may be used.
[0111]
Alternatively, as shown in FIG. 7 (D), a combination of, for example, a propeller-shaped rotary blade 25-a spiral rotary blade 26 may be considered as a combination of a material mixing rotary blade-mixture transport rotary blade.
[0112]
In the schematic diagram showing the screw 20 in FIG. 7, the small-diameter spiral rotary blade 23 and the large-diameter spiral rotary blade 24 are indicated by a solid line, the propeller-shaped rotary blade 25 is indicated by a broken line, and the spiral rotary blade 26 is indicated by a thick line. I have. The rotating shaft 21 is indicated by a solid line extending horizontally.
[0113]
(Embodiment 4)
In the first embodiment, the configuration in which one screw is provided in the screw casing is shown. However, when the conveyance and mixing by the screw can be continuously performed, a plurality of screws are provided in the same screw casing. A configuration may be used.
[0114]
In the case shown in FIG. 8A, two screws 20 are provided in a screw casing 31 having a substantially eyeglass-shaped cross section. The screw casing 31 having such a configuration has a configuration in which two substantially cylindrical screw casings 31a and 31b are juxtaposed without providing a wall therebetween, and the combined screw casings 31a and 31b are provided. Screws 20a and 20b are provided therein.
[0115]
The screws 20a and 20b may have the same configuration, and may adopt the configuration described in the first embodiment or the third embodiment. Although not shown, the material supply port may be provided so as to straddle both screw casings 31a and 31b, or may be separately provided in each screw casing 31a and 31b.
[0116]
In the case shown in FIG. 8 (B), a configuration in which two screws 20a and 20b are provided in a substantially elliptical screw casing 31, and a projecting partition member 32 is provided between the screws 20a and 20b. Is shown. The configuration of the screw 20 and the configuration of the material supply port may be the same as described above.
[0117]
In addition, the case shown in FIG. 8 is a cross-sectional view at a location where the large-diameter spiral rotary blade 24 is provided.
[0118]
The present invention is not limited to the above-described embodiment, and may be changed as needed without departing from the gist thereof.
[0119]
For example, in the above description, the case where the screw casing type continuous mixing apparatus is used for mixing CSG concrete has been described as an example. However, when this apparatus is applied, application to a mixture other than concrete is also possible. Further, it can be applied to both wet mixing and dry mixing.
[0120]
In the above description, the case where a plurality of material supply ports are provided for the same material has been described. For example, as shown in FIGS. 9A and 9B, a material supply port 41 to which a suction hose can be connected is provided. What is necessary is just to provide so that it may be provided on the slide member 42 and slide freely in the long hole 43 provided in the screw casing 11.
[0121]
The slide member 42 may be configured to be movable along a guide 44 provided on the opposite longitudinal edge of the long hole 43. A cover member 45, such as a bellows membrane 45a, is provided between the slide member 42 and both ends of the long hole 43 so that no opening is formed in the long hole 43 even when the slide member 42 is moved. It is good. Although not shown, the slide member 42 may be fixed in position with a stopper or the like.
[0122]
Also, the case where the material supply to the material supply port is continuously supplied by a hose so that the supply amount can be measured has been described as an example, but other supply within a range where continuous mixing of the screw type continuous mixing device can be maintained. It does not matter even if means is adopted.
[0123]
【The invention's effect】
The main effects of the present invention will be described below.
[0124]
That is, in the present invention, the screw-type continuous mixing apparatus is moved to a desired place in a self-propelled manner, and the mixed material is mixed while being transported by using a screw provided in the screw casing to obtain a desired mixture. It can be manufactured continuously at a moving location.
[0125]
Management of the production amount of such a mixture, for example, management of the production amount per unit time, can be easily performed by controlling the rotation speed of the screw.
[0126]
Since the screws used for conveying and mixing the materials are provided in the cylindrical screw casing, the powder and the like put into the screw casing scatter around, unlike the case where the screw is provided in an open system. I can't.
[0127]
If the spiral rotating blades are provided in the order of the small-diameter spiral rotating blades and the large-diameter spiral rotating blades, a non-powder material such as crushed stone is supplied on the small-diameter spiral rotating blade side, and the large-diameter spiral rotating blades are provided. The side can supply powder material in an amount corresponding to the volume ratio of the remaining screw casing, and screw concrete production to mix non-powder material such as aggregate and crushed stone with powder material such as cement. It can be performed appropriately and continuously by the formula.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of a self-propelled screw type continuous mixing apparatus of the present invention.
FIG. 2 is a front view showing the self-propelled screw type continuous mixing apparatus shown in FIG. 1 as viewed from the direction of the arrow.
FIG. 3 is a plan view showing the self-propelled screw type continuous mixing apparatus shown in FIG. 1 as viewed from above.
FIG. 4A is a perspective view showing a modified example of a screw used in a self-propelled screw type continuous mixing apparatus, and FIG. 4B is a front view schematically showing a propeller-shaped rotary blade used in FIG. FIG.
FIG. 5A is a perspective view showing a modified example of a screw used in a self-propelled screw type continuous mixing apparatus, and FIG. 5B is a front view schematically showing a propeller-shaped rotary blade used in FIG. FIG.
FIG. 6 is a side sectional view showing a modification of the device portion of the self-propelled screw type continuous mixing device of the present invention.
FIGS. 7A to 7D are explanatory views schematically showing modified examples of the configuration of the rotary blade of the screw.
FIGS. 8A and 8B are cross-sectional views showing a configuration in which a plurality of screws are provided in the same screw casing.
FIG. 9A is a plan view of a main part showing a case where a material supply port is formed in a slide type capable of freely moving, and FIG. 9B is a cross-sectional view of a main part.
[Explanation of symbols]
1 vehicle
1a Crawler type heavy equipment vehicle
2 Engine type hydraulic unit
3a drive wheel
3b idler
4 Crawler
5 cab
6 arm
7 Stand
10 Screw-type continuous mixing equipment
11 Screw casing
11a Tip
11b rear end
11c Backflow prevention member
12 Material supply port
13 Hopper
14 Material supply port
14a hose
15 Material supply port
16 Material supply port
16a injection nozzle
16b Nozzle end
16c hose
17 Material supply port
18 Hatch
19 Hatch
20 screws
21 Rotation axis
21a Small diameter tip
21b Rotary shaft support member
21c bearing
22 Rotation drive means
23 Small-diameter spiral rotating blade
24 Large-diameter spiral rotating blades
25 Propeller-like rotating blades
26 spiral rotating blades
31 Screw casing
31a Screw casing
31b screw casing
32 Partition member
41 Material supply port
42 slide member
43 Slot
44 Guide
45 Covering member
45a bellows membrane
a Installation area
b Installation area
c Installation area
d Installation area
θ Edge-to-edge angle

Claims (9)

A screw rotating shaft rotatable by a driving means, a spiral rotating blade as a rotating blade for mixing material transport, and a propeller-like rotating blade as a rotating blade for material mixing, directed in a screw transport direction along the longitudinal direction thereof. A screw provided in order, a screw casing containing the screw, and a material supply port provided in the screw casing, and a screw type for carrying and mixing the material using a screw rotated by the driving means. A continuous mixing device;
A self-propelled screw-type continuous mixing device, comprising: a self-propelled vehicle equipped with the screw-type continuous mixing device. In the self-propelled screw-type continuous mixing device according to claim 1, the helical rotary blade is a small-diameter helical rotary blade provided on the rotary shaft toward a screw conveying direction along a longitudinal direction of the rotary shaft. A large-diameter helical rotary blade having a larger diameter than the small-diameter helical rotary blade provided subsequent to the small-diameter helical rotary blade;
The inner diameter of the screw casing is set to the same inner diameter up to the tip end side in the screw transport direction, including the installation part of the large-diameter spiral rotary blade and the propeller-shaped rotary blade,
A self-propelled screw-type continuous mixing device, wherein an inner diameter of a screw casing portion provided with the small-diameter spiral rotary blade is set smaller than the same inner diameter. In the self-propelled screw-type continuous mixing device according to claim 1, the helical rotary blade is a small-diameter helical rotary blade provided on the rotary shaft toward a screw conveying direction along a longitudinal direction of the rotary shaft. A large-diameter helical rotary blade having a larger diameter than the small-diameter helical rotary blade provided subsequent to the small-diameter helical rotary blade;
A self-propelled screw-type continuous mixing apparatus, wherein an inner diameter of a screw casing portion provided with the small-diameter helical rotary blade and the large-diameter helical rotary blade is set to be the same. The self-propelled screw-type continuous mixing device according to claim 1 or 2,
The self-propelled screw-type continuous mixing device, wherein the small-diameter spiral rotary blade and the large-diameter spiral rotary blade are provided at the same pitch with respect to the rotation axis. The self-propelled screw-type continuous mixing device according to any one of claims 1 to 4,
The screw casing portion provided with the helical rotary blade and the propeller-shaped rotary blade is set to the same inner diameter,
The self-propelled screw-type continuous mixing device, wherein the spiral rotating blade and the propeller-shaped rotating blade are provided at the same pitch on the rotating shaft. The self-propelled screw-type continuous mixing device according to any one of claims 1 to 5,
A self-propelled screw-type continuous mixing apparatus, wherein a plurality of material supply ports of the same mixed material are provided at different positions along a longitudinal direction of a screw casing. The self-propelled screw-type continuous mixing device according to any one of claims 1 to 5,
The self-propelled screw-type continuous mixing device, wherein the material supply port is provided at a position variable along a longitudinal direction of the screw casing. The self-propelled screw-type continuous mixing device according to any one of claims 1 to 7,
A self-propelled screw-type continuous mixing device, wherein a plurality of screws are provided in the same screw casing. In the screw conveying direction along the longitudinal direction of the screw rotating shaft, the small-diameter spiral rotating blade, the large-diameter spiral rotating blade larger than the small-diameter spiral rotating blade, the propeller-shaped rotating blade, and the spiral rotating blade are arranged. A screw provided in order at the same pitch, a cylindrical screw casing formed in a straight cylindrical shape having the same inner diameter and storing the screw, and a plurality of material supply ports provided in the screw casing, Of the plurality of material supply ports, the material supply port provided on the installation side of the small-diameter helical rotary blade of the screw casing is set for material supply of the largest bulk material having the largest bulk of the mixed material, and is rotated. A screw-type continuous mixing device that performs the transport and mixing of the material using the screw,
A self-propelled screw-type continuous mixing device, comprising: a self-propelled vehicle equipped with the screw-type continuous mixing device.

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