KR890002881B1 - Apparatus for providing fine grained ice or snow - Google Patents

Abstract

Fine grained ice or snow suply apparatus (10) provides thrust power to sending back direction for satisfactory mixing agitation in a receipt hopper (23). Inside of the receipt hopper (23) having entrance and exit install a rotation axis by rotation stirring equipment which is vertical to sending back direction. The rotation axis installs a number of agitator vanes that extend outside of the axis. A part of the vanes and the other vanes are oppositely declined to the rotation axis of a front section and a parallel section of rotary direction.

Description

Fine grain ice or snow supply

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a side view showing one embodiment of a portable fine grain ice supply apparatus including a supply apparatus according to the present invention.

2 is a longitudinal sectional view of the first stage and second stage icebreaking water of the in-phase.

3 is a rear view of the statue.

4 is a perspective view showing a stirring device for the next step of the second stage icebreaking unit.

5 is a perspective view of the upper part of the supply conveyor of the next fixed part of the stirring device described above.

6 is a longitudinal side view showing a third stage icebreaker and a secondary icebreaker.

7 is a perspective view of the air blowing device of the statue.

FIG. 8 shows a pair of stone drums, which are main parts of the third stage icebreaking unit, and FIG. 8 (a) is a plan view. Figure 8 (b) is a side view as seen from the axial direction.

FIG. 9 is an explanatory view showing the icebreaking action of the stone drum of FIG.

FIG. 10 is a side view showing the groove drum and the crushing drum which are main parts of the secondary ice-breaking device. Figure 10 (b) is a plan view.

FIG. 11 is a partially enlarged view of FIG. 10, and FIG. 11 (a) is a plan view showing a state in which the crushing protrusions face the outer circumferential groove in the XIA portion of FIG. FIG. 11 (b) is a plan view of the XIB part of FIG. 10 (a). Fig. 11 (c) is a view of the crushing protrusion in the drum axis direction. FIG. 11 (d) is a side view showing the XID part of FIG. 10 (b).

12 is a cross-sectional side view at right angles to a drum shaft showing the icebreaking action by the grooved drum and the crushed drum.

FIG. 13 is a perspective view of a stirring device serving as a supply device for fine grain ice and the like according to the present invention in a second step icebreaking device. Fig. 13 (b) is a perspective view showing a pair of rotary shafts with stirring blades. Fig. 13 (c) is a cross sectional view of the axis perpendicular to the pair of rotation shafts in Fig. 13 (b).

FIG. 14 is a vertical sectional view showing the metering device, and FIG. Figure 14 (b) is a longitudinal sectional view in the direction including the axis.

FIG. 15 shows another embodiment of the stationary fine grained ice feeding apparatus according to the present invention, and FIG. 15 (a) is a front view. Figure 15 (b) is a side view.

* Explanation of symbols for main parts of the drawings

10: icebreaker 23: storage hopper

71a, 71b: rotation axis 72, 72a, 72b, W _1- W ₁₄ : stirring

74: sprocket or pulley 75: rotary drive

76: electric device

The present invention relates to a device for supplying ice or snow on fine particles.

The method of mixing ice with water and using it when kneading concrete is conventionally employed. Specifically, a slice ice machine or the like is supplied as a temporary plant in the vicinity of the raw concrete, and slice ice is supplied together with water during the concrete kneading.

However, this is only a supply of sliced ice with a large surface area for the purpose of cooling because the raw concrete kneaded becomes quite high when the outside air temperature is high seasonally or when the outside air temperature is excessively increased, such as in the tropics. It was not suitable for kneading cement including room temperature.

For example, Japanese Laid-Open Patent Publication No. 61-49806 indicates that high-quality concrete can be produced by supplying fine ice for cement kneading.

In detail, when granulating hydraulic cement compositions such as mortar and concrete, fine grain ice or fine grains of snow instead of water (e.g., 1 mm-5 mm particle diameter, the amount required for hydration of cement) Even if the supply quantity is reduced to the nearest, evenly kneading can be achieved.The amount of water required for the hydration reaction is good at 25% -30% of the amount of cement, but it is actually 45% -60 due to poor mixing. Mixing fine-grained ice with the conventional method that had to use% large amount of unnecessary water, the ice is solid like cement or sand, so evenly mixing even in small amount, and the excess large amount of water is unnecessary The unnecessary large amount of water is excluded because it degrades the concrete's strength or cracks after drying. In this cement kneading process, it is possible to supply fine-grained ice having a uniform particle size suitable for use in the cement kneading process. The action is advantageous.

However, in the past, only an ice maker for crushing and supplying large ice ingots is known, and an ice maker for ice-making by fine granules in advance is known.

However, in the conventional ice-breaker, fine grains of 1mm-5mm required are not provided and cannot be provided in a state having an even granularity. Was poor, the kneading was often not good.

Therefore, the inventors of the present application have independently developed an icebreaking device for producing ice-bearing or snow-melting on a fine-grained particle having a uniform particle size, and at the same time filed a patent application to solve the above unreasonable point.

However, it has been found that a new problem arises here. That is, for example, ice-breaking or snow-standing of fine particles having a particle diameter of 5 mm or less is crushed by the ice-breaking device, and then the weight is engraved by a scale absorber, and only a fixed quantity is sent to the supply device of the air supply means. Because of this, once the quantity of granulated ice is stored at a time and moved to the feeder, it is easy to change the ice due to the temperature change of the outside air or the ice itself. It becomes unreasonable by changing water into water or attaching to the fine grain itself of melting ice or the inner surface of the storage chamber, or by inhibiting the flow of fine grain ice. There was also the possibility that the supply could not be supplied to the raw concrete plant.

Therefore, it is effective to always stir the stored fine ice lamps so that they are not attached to each other with a stirring device having a rotary blade. There was also an unreasonable difficulty in stirring the whole granulated ice lamp, which is difficult, and difficult to obtain a good force for forcing the granulated ice lamp group in the conveying direction thereof.

An object of the present invention is to provide a feeding device such as fine ice, which can solve the above-mentioned unreasonable points and obtain a force for sufficiently pushing the fine ice and the like stored in the storage hopper in the conveying direction while mixing and stirring it satisfactorily.

In order to achieve the above object, in the present invention, a rotary shaft, which is substantially perpendicular to the main conveying direction of fine ice, etc., is installed freely by the rotation driving means in a storage hopper provided with an inlet and an outlet, and the plurality of shafts extend outwardly therefrom. Install the stirring blades. And the cross section parallel to the rotating shaft of the front part of a rotation direction and a part of the some stirring part is formed so that it may incline mutually in reverse direction with respect to a rotating shaft.

As a result, a predetermined amount of fine ice, etc. stored in the storage hopper is subjected to the stirring action of lifting or pushing down by the rotation of the stirring blade group, and in the direction parallel to the rotation axis by the inverted inclination of the front surface of the stirring. Move fine ice, etc. in reverse direction. Therefore, since the stirring blades are spaced in the direction of the rotation axis, fine ice and the like move in parallel with the direction of the rotation axis, so that one rotor blade does not stir only fine grain ice, etc. in the rotation path, and the whole can be stirred uniformly. In addition, the cavity and the like are prevented from occurring in the rotational trajectory. In addition, the pushing force of the stirring blade pushes the fine ice, etc. in the conveying direction, so that the fine ice groups do not stay in the storage hopper. As a result, the fine ice, etc., is agitated well. Attachment to the storage hopper wall is eliminated. Therefore, it is possible to supply fine grain ice and the like to the raw concrete plant while maintaining the shape as it is.

The effect of installing two or more rotary shafts in parallel than one in parallel is increased, and in particular, stir blades are spirally arranged on the outer periphery of the rotary shaft, and the corresponding stirring blades of adjacent rotary shafts are installed in a position where the corresponding stirring blades of the adjacent rotary shafts are almost inclined and are mutually opposite to the rotary shafts. In this case, when the inclined rotational front surface is provided, movement in the rotational axis direction such as fine ice by mutual rotor blades is made up and down, and the stirring effect is improved.

Hereinafter, embodiments of the present invention will be described in detail. 1 shows a portable ice-breaking device according to an embodiment of the present invention. This embodiment shows an example in which the apparatus for supplying fine grained ice with a uniform particle size to be used in place of water when kneading the hydraulic cement nitriding composition is applied to the raw concrete plant.

In Fig. 1, the fine grain ice supply device 1 lifts the ice block on the block that has been carried by the vehicle 2 at the ice making station, that is, the block ice 3, to the hopper 5 by the ice lift 4, and then slides on the slide plate 6 to make ice ice. Put into Hopper 5 of Device 10. The injected block ice is crushed onto the uneven granulator by the first icebreaker 11, and the ice is again crushed into a grain of small size, for example, about 30 mm in the second icebreaker 12 below. The icing on the granulator thus obtained is introduced into the hopper 16 of the third stage icebreaker 15 adjacent by the feeding conveyor 14 while being stirred so as not to be mutually bound by the stirring device 13. In the third short-fried ice part 15, granulated ice of about 10 mm in size is obtained. In this step, the particle size of the ice is roughly uniform.

The first and third icebreakers 11, 12, and 15 are used as the primary icebreaker I for ice-breaking ice blocks in the present embodiment. The number of stages of the ice-breaking part of the primary ice-breaking device I can be arbitrarily determined as needed. The ice on the assembler iced in the primary icebreaker I falls to the secondary icebreaker II at the bottom, where ice, for example, a particle diameter of 5 mm or less, is iced on the fine grain.

The fine granulation of the obtained uniform particles is agitated to prevent mutual binding by the stirring device 17, and is introduced into the hopper scale 21 by the supply conveyor 18, where the gate 22 is heated in a step where the weight is weighed and reaches a predetermined weight. It falls in the rear storing hopper 23.

The storage hopper 23 is composed of a fine ice feeding device configured to push fine ice while being agitated to prevent the fine ice from binding each other, and supplies fine ice to the fixed quantity feeding device 24 installed below.

Fine-grained ice supplied to the fixed-quantity feeder 24 is supplied to the fresh concrete mixer 27 through the feed duct 26 together with the blown by the fixed-quantity blower 25. Fine grain ice having a uniform particle size is kneaded with cement, sand, and gravel without supplying water, and thus fine grain ice is solidly mixed with cement or sand, and thus evenly mixed with a small amount. Therefore, conventionally, unnecessary water is used more than 45-60% of the amount of cement due to the fact that it cannot be mixed with water, resulting in a decrease in the strength of the poured concrete or cracks after drying, resulting in deterioration of product quality. By using granulated ice of uniform particle size, it is possible to drastically reduce unnecessary large amount of water and to evenly mix. It is demonstrated that the concrete in which the ice amount was poured in about 30% of cement ratio is hold | maintained more than twice as much strength as the normal concrete which used water in large quantities.

In the above embodiment, the icebreaking device 10, the hopper scale 21, the storage hopper 23, the metering feeder 24 and the blower 25 are mounted on the frame 28 and the independent wheel 29 is installed on the frame 28. Even if the concrete plant is stationary at the construction site, it is easy to move the granular ice-feeding device I. Therefore, using commercially available block ice, it is crushed and weighed with fine-grained fine-grained ice to produce fresh concrete. It can be supplied to the plant. It is also possible to use natural lumps in addition to commercially available block ice.

Next, the fine grain ice supply device I shown in FIG. 1 will be described in detail.

2 and 3 show icebreaking units 11 and 12 of the first and second stages. Both icebreakers 11 and 12 are housed and disposed in one casing 31 which is refitted on the frame 28, and the casing 31 is provided with two rotating drums 32a, 32b, 33a and 33b parallel to each other at the upper and lower ends. Rotating freely on the wall, these rotating drums 32a, 32b, 33a, 33b are forced by the drive motor 34a via the transmission 34, such as pulleys, belts or sprockets and chains installed on the outer ends thereof. It is rotated synchronously.

Each rotating drum 32a, 32b, 33a, 33b is called a crow drum which is provided with a plurality of sharp protrusions 35a, 35b on the outer circumference.

In the first stage ice-making unit 11, a stone 35a is erected on the block ice introduced from the upper side to generate a crack and crush it, so that it is inserted between the rotating drums 32a and 32b to drop the uneven coarse ice. The guide plate 36 provided below the rotating drums 32a and 32b guides coarse icing and falls between the rotating drums 33a and 33b of the second stage icebreaker 12.

The second stage icebreaker 12 is free to adjust the spacing between the rotating drums 33a and 33b, thereby freely adjusting the icebreaking granularity.

The icing ice of the coarse granules thus obtained is dropped into the lower stirring device 13 shown in FIG. 4 while the granularity is still uneven. The stirring device 13 is provided with a hopper case 41 with a lower portion, the upper portion of which is connected to the second stage icebreaker 12, the lower portion of which is connected to the supply conveyor 14, and the plurality of parallel rotary shafts 43 are rotatably driven therein. The stirring blade 42 extended radially in the rotational axis 43 is installed in a different angle. In addition, the drive of the rotating shaft 43 is abbreviate | omitted in the figure.

When the ice is contained in the hopper case 41, the icebreaker 15 is supplied to the next icebreaker 15 through the supply conveyor 14. At this time, the ice is formed on the bridge so that the assembled ice is bound to each other according to the atmospheric conditions such as ice temperature or outdoor temperature. In order to prevent the air supply of the assembly cost due to the formation of a cavity in the lower part, the assembly ice is forcibly stirred by the stirring blade 42 to smooth the flow of icebreaking to the supply conveyor 14. have.

The supply conveyor 14 shown in FIG. 5 is a so-called flash conveyor mounted at intervals with a plurality of flashlights 47 on the chain device 46 engaged with the sprocket 45, and the lower part thereof reaches the lower end of the stirring device 13. It is. Then, the sprocket 45 is moved, and the assembly 47 is moved to the upper surface by sliding the assembled ice on the bottom surface of the conveyor case 48 that surrounds the movement trajectory of the fried 47. Drop into hopper 16 of the three-stage icebreaker 15.

At this time, the compressed air sent through the pipe 50 in the air blower not shown to improve the discharge of the assembled ice on the surface of the flylight 47 and to prevent the ice from adhering to the light 47 is directed to the end of the pipe 50 toward the surface of the flylight 47. By ejecting from the plurality of perforated air suction holes 51, the ice on the flylight 47 is blown into the absorber 16 of the third stage icebreaker 15.

The third stage icebreaker 15 and the secondary icebreaker II are housed together in a common casing 53.

The third stage icebreaker 15 has two parallel stone drums 54a, 54b placed at a predetermined clearance as shown in FIGS. 6 and 8, and the microscopic drums 54a, 54b directly below the clearance described above. In addition to being spaced apart, parallel intermediate rolls 55 are provided. The stone drums 54a and 54b are supported by the casing 53 so that they can be rotated in the direction of the arrow of Fig. 8 (b) by a driving device not shown, and the middle roll 55 is fixed to both ends of the casing 53. The protruding stone 56 has a shape of a hill (an abacus) having a ridgeline protruding slightly in the front of the rotational direction, and is arranged at equal intervals in the circumferential direction, and is erected in parallel with the drum shaft. By the rotation, one stone is placed in the middle of several stones of the opponent's stone drum in the state of excretion to the clearance. The assembled ice supplied between the drums is fitted to the surface of the drum 56 or the stone 56 and the drum surface, which are attracted between the clearances of the drum by rotation of the pair of stone drums 54a and 54b in the direction of the eighth arrow. At the distal end of the stone 56, cracks are formed by assembling ice.

The icebreaking icing that has passed between the stone drums 54a and 54b is hit by the middle roll 55 below it, divided into left and right sides, and falls between the stone 56 and the middle roll 55 of the stone drum 54a and 54b. The particle size is even. The assembled ice that has passed through the third stage icebreaking unit 15, ie, the end of the primary icebreaker I, becomes granulated ice that has been crushed to hold a uniform uniformity of about 10 mm.

In addition, the casing 52 and the side portions of the stone drums 54a and 54b are somewhat adjacent to each other so that the assembled ice at the second stage icebreaking unit 12 supplied between the stone drums 54a and 54b does not flow to both sides of the stone drums 54a and 54b. If the particle size of the ice is reduced, its state is greatly changed due to the change of the outside temperature or the temperature of the ice itself, and it is easy to cause clogging or sticking during the processing process and to prevent the flow of ice. As shown in Figs. 6 and 7, the air blowing device 58 which draws compressed air and ejects it from the plurality of air nozzles to the wall is set to force the flow of ice or to prevent the ice from being attached to the wall by the air curtain. Teflon coating or the like may be used to smooth the flow of ice. Teflon coating is very good when it is applied to the inner wall surface of other parts that may be attached to ice.

The granular ice which is supplied at the last end of primary icebreaker I (not limited to three stages as in the present embodiment) is iced by fine grained ice having a uniform particle size in secondary icebreaker II downstream. In the secondary ice-breaker II, the ice-breaking granularity of 5 mm or less, preferably 1 mm or more and 5 mm or less is uniformly obtained according to the use conditions. As the ice-breaking means of the primary ice-breaking device I becomes smaller, the ice of snow is mixed when the ice-breaking granularity decreases, so that it is attached to the stony wall under the influence of the ice temperature or the ambient temperature environment, and the stone drum is attached to the surface of the roll. It may become flat like this, and may become impractical. Thus, in the embodiment of the present invention, as shown in FIG. 6, FIG. 10 and FIG. 11, the secondary icebreaking device II is set.

That is, the groove drum 61 and the crushing drum 62 having rotation shafts parallel to each other at the lower portion of the casing 53 are freely rotatably driven in the direction of the arrow of FIG. 6, and they are driven by rotation means not shown. The illustrated arrow direction refers to a direction in which both drums 61 and 62 are rotated in opposite directions in a direction in which icing on the assembler supplied between the drums 61 and 62 is wound between the drums.

The grooved drum 62 is provided with a plurality of outer circumferential grooves 63 on the outer circumference at a predetermined pitch in the drum axial direction. The outer circumferential groove 63 may be a groove for one drum outer circumference or a groove for one discontinuous one. In this embodiment, the groove is a single column discontinuously. That is, as shown in FIG. 11, at least one drum axial direction groove 65 disposed at predetermined intervals in the mountain 64 of the outer circumferential groove 63 is set to make the outer circumferential groove discontinuous. The drum axial grooves 65 and 65 of the adjacent outer circumferential grooves 63 and 63 do not necessarily have to be erected in a row in the drum axial direction. It arrange | positions in multiple directions at predetermined intervals in the direction. The rectangular angle cross section of the outer circumferential groove 63, that is, the cross section including the drum shaft may be V-shaped or V-shaped, but is not limited thereto. On the other hand, the shredding drum 622 is provided in the outer circumferential groove 63 of the grooved drum 61 at intervals in the circumferential direction with a crushing projection 66 facing the tip, with a predetermined clearance, and at least one crushing projection 66 in the circumferential direction. In this embodiment, the shredding protrusions 66, which are arranged at equal intervals in the circumferential direction, are composed of a group of protrusions each set in parallel to the drum axial term. However, it is not necessary to establish a series of projections.

The crushing projection 66 has a cross section viewed in the drum rotation direction as shown in Figs. 11 (a) and 11 (c), and has a sharp tip at which the leading edge a in the drum rotation direction rises in a steep gradient on the drum surface. It is intended to form.

In addition, the rotation driving means (not shown) is configured to sufficiently increase the rotation speed of the crushing drum 62 than the groove drum 61. The mutual spacing between the two drums 61 and 62 can be adjusted by a position adjusting device (not shown).

Referring to the operation of the secondary icebreaker II configured as described above with reference to FIG. 12, the assembled ice supplied from the primary icebreaker I is loaded above the clearance between the grooved drum 61 and the crushed drum 62, among which Icing cannot pass through the clearance and is retained between the circumferential groove 63 and the shredding drum 62.

At this time, in the outer circumferential groove 63, the crushing protrusion 66 of the crushing drum 62 is invaded with a predetermined clearance, and is pulled downward of the primary crushing device I while crushing the assembled ice with the tip of the crushing protrusion 66 having a sharp tip. The tip 66 of the crushing protrusion does not necessarily have to be pointed at the end, but it is preferable to use the tip in the direction of rotation raised to the steep gradient on the drum surface in order to increase the impact with the icing ice and draw the fine ice.

The circumferential spacing of the crushing protrusions 66 corresponds to the rotational speed of the crushing drum 62. For example, if the gap is too narrow, such as setting up the crushing protrusions continuously in the circumferential direction, the ice in the outer circumferential groove 63 is not retained in the outer circumferential groove 63. Before crushing by the force of gravity, the crushing protrusion 66 slips up and pushes up, which causes the icebreaking ability to be extremely poor, resulting in a large accumulation of granulated ice between the drums 61 and 62 in China. Therefore, the circumferential spacing of the crushing protrusions should be determined by sufficiently considering the crushing ability.

The drum axial groove 65 installed in the grooved drum 61 aims to prevent slipping of the assembled ice in the outer circumferential groove 63, and catches the drum shaft 65 to the assembled ice to prevent slip in the outer circumferential groove 63, and thus The icebreaking efficiency is increased by having a lot of shock contact with the assembled ice.

The larger the difference in the relative speed between the grooved drum 61 and the crushed drum 62, the greater the impact force between the crushed protrusion 66 and the assembled ice, but the greater the slip in the outer groove of the assembled ice.

In this way, fine grain-like icing of a uniform particle size of about 5 mm-1 mm is generally obtained. To adjust the particle size, an arbitrary value can be obtained by adjusting the interaxial distance (drum distance) between the groove drum 61 and the crushing drum 62.

The uniform particle size granular eavesing obtained by the secondary icebreaker II is guided to the icebreaking guide 59 of the casing 53 and introduced into the stirring device 17 below it at the fine ice outlet 67 and introduced into the hopper scale 21 through the feed conveyor 18. The stirring device 17 and the supply conveyor 18 have substantially the same structure as the stirring device 13 and the supply conveyor 14 mentioned above. As the icing to be handled is in the form of fine particles, the standard is taken into consideration, and the part where the snow component is easily attached is prevented by applying Teflon coating.

Hopper scale 21 measures the amount of icing on the supplied fine grains by the weight sensor and stops the operation of the supply conveyor 14 when the predetermined weight is measured, and simultaneously opens the gate 22 and drops the fine grained ice into the storage hopper 23. . Hopper scale 21 needs to be separated from vibration received by icebreaker 10 and frame 28 in order to increase the accuracy of weighing. For this purpose, a hydraulic cylinder or hydraulic jack, not shown, is interposed between frame 28 and frame 28. It is preferred to support the Hopperscale 21 at.

Since the amount of ice measured in the fine ice or snow hopper scale 21 is temporarily supplied to the storage hopper 23 through the inlet 23a, icing and the like in the storage hopper 23 is easily loosened and cannot be supplied smoothly from the outlet 23b. . In particular, the tendency becomes more severe when the storage hopper 23 is eroded toward the outlet 23b.

Therefore, a stirring means having a conveying function, such as stirring, is provided in the storage hopper 23 as fine ice or snow feeding device. The stirring means is the main conveying direction of fine-grained ice or snow. In this embodiment, the rotating shaft 71, which is substantially perpendicular to the vertical direction, is rotatably supported by the receiving hopper 23 by the rotation driving means. Then, the plurality of stirring blades 72 are mounted on the rotary shaft 71 so as to extend outward preferably in a radial direction (axial perpendicular direction). In this embodiment, the plurality of stirring blades 72 are configured such that their proximal ends are positioned spirally with a phase of 90 degrees on the outer periphery of the rotation shaft 71.

The plurality of stirring blades 72 has a cross section parallel to the axis of rotation 71 in the front direction of the improvement direction, that is, in this embodiment, at least two types of stirring blades 72a in which a cross section perpendicular to the longitudinal direction of the stirring blade 72 is inclined in opposite directions with respect to the axis of rotation 71. Has 72b.

At least two of the rotating shafts 71 provided with the stirring blade 72 of such a structure are arrange | positioned in the accommodating hopper 23 in parallel. In the present embodiment, a plurality of stages are arranged up and down in parallel in pairs, and the driving force of the rotary drive unit 75 is transmitted to the sprocket or pulley 74 installed at the outer end of each rotary shaft 71 via the electric motor 76, and each rotary shaft 71 is in the same direction with the isochronous. The rotating drive means which rotates is comprised.

In a pair of parallel rotary shafts 71a and 71b of the same stage, the stirring blades 72 corresponding to each other are in phase as shown in FIG. The inclination with respect to the rotation axis is assumed to be mutually opposite directions 72a and 72b.

With such a configuration one axis of rotation, for example 71a to claim 13 (b) W ₁ -W ₄ of the stirring wing 72 when rotated in a direction of the arrow shown in FIG. In addition, the clearance and drag the fine ice in the housing 23 upwardly hoppeo W ₁ and W ₄ are moved in the right direction in the drawing parallel to the rotation axis 71a by the inclination of the front surface of the stirring blade. Further, the stirring blade W ₅ -W ₇ pushes the fine-grained ice downward and moves parallel to the rotational axis 71a as indicated in the figure. The action of pushing the fine ice downward is to convey the fine ice from the storage hopper 23 to the outlet, and the action of pulling out and moving the parallel ice parallel to the rotating shaft 71a is a stirring operation. In particular, if the fine ice is not moved parallel to the rotation axis 71a, only fine ice in one rotational trajectory will be stirred and pushed downward. Stirring and conveyance of the fine ice between the stir blades become difficult. In order to prevent this, it is effective to move the fine ice in the opposite direction parallel to the rotation axis 71a, and for this purpose, two or more kinds of inclinations of the stirring blades are provided.

It is effective for the stirring and conveying action to arrange a pair of parallel rotation shafts 71 in parallel. At this time, a pair of rotating rotor blades corresponding to each other (e.g., W ₅ and W _8, W ₆ and W _9, etc.) are installed at substantially the same position and have a rotational front surface inclined in opposite directions. The stirring effect becomes good. This is because fine-grained ice is subjected to the stirring action that one rotary blade has gone in one direction by the other rotary blade. These pairs of rotor blades are set in multiple stages, and fine grain ice falling quantitatively falling on the hopper scale 21 is stirred and conveyed well, and is supplied to the fixed-quantity supply device 24 of the next step from the outlet 23b.

As shown in FIG. 14, the fixed quantity supply device 24 freely rotates the rotor 82 on the central axis of the casing 81 having a semicircular cross section at the bottom. On the outer circumference of the rotor 82, a receiving port 83 having a semi-circular cross section of the rotor 82 is provided in the rotor axis direction and arranged at equal intervals in the circumferential direction. On the other hand, a supply passage 84 is formed on the bottom wall of the casing 81 to form one cross-sectional circular space when the bottom wall of the casing 81 coincides with the one storage port 83 described above. The lower part of the casing 81 is provided with a circular air inlet 85 and a conveying port 86 corresponding to the supply passageway 84, an outlet of the blower 25 is connected to the air inlet 85, and a supply duct 26 is connected to the conveying port 86. Accordingly, fine-grained ice introduced into the casing 81 of the metering device 24 is sequentially transported into the receiving port 83 in the upper portion of the rotor 82 which is intermittently or continuously rotated by external power, and guided to the inner wall of the casing 81 to be moved downward. When one receiving port 83 coincides with the supply passageway 84 of the lower casing, the air pressurized by the blower 25 is introduced into the air inlet 85 and the fine grained ice together with the air is conveyed to the fresh concrete mixer 27 through the supply duct 26. Supply. In addition, a damper device (not shown) is disposed at the inlet of the blower 25, and the air is prevented from being discharged by closing it. In addition, in fresh concrete plants, the ground clearance of the mixer is high, so the ice supply timing at the surface is not determined. Therefore, it is better to carry out ice supply time by instruction from a mixer.

In addition, fine-grained ice was transported due to the following reasons. In other words, the amount of fine grain ice per 1㎥ of raw concrete is 140kg-170kg (sand, depending on the moisture content of aggregate) .Then, it is supplied after it is laid, but if it is dropped using a chute device, the chute device is blocked. do. This is also a phenomenon that occurs when the state of the ice changes due to temperature changes when the grain size of the ice becomes fine. Therefore, fine ice needs to be forcibly supplied in a short time.

In this way, the fine-grained ice of the uniform particle size supplied to the raw concrete mixer 27 works well as mentioned above, and it becomes possible to manufacture high-strength concrete etc.

Of course, it is apparent that the present invention can be applied not only to supplying fine-grained ice used for cement kneading but also as a supply device for uniformly stirring and smoothly supplying fine-grained ice or granulated granules.

The embodiment shown in FIG. 15 constitutes a static fine-grained feeding device 111 that can be applied to a stationary fresh concrete plant.

In other words, an ice lift 113 is installed in the frame 112 and blocks 3 are transported to the top. The supplied block ice 3 was first ice-breaked into granular form from above through the first icebreaking unit 114 and the second icebreaking unit 115, and stirred down by the stirring device 116, and then again into the granular ice in the third icebreaking unit 117. By completing the process of the primary icebreaker I. Then, the granulated ice reaches the secondary icebreaker II, which becomes granular ice with a uniform particle diameter and is dropped while being stirred by the stirring device 118, and is moved transversely by the screw feed conveyor 119 to fall on the hopper scale 121. Receiving the stirring action of the stirring device 120 functioning as the feeding device according to the invention, fine-grained ice is conveyed to the fixed-quantity feeding device 120, and the fresh ice-cone plant is made by using the compressed air from the blower 122 and the supply duct 123. Supplied to. The configuration of each of these device portions does not significantly deviate from the above-described embodiment, but is merely disposed sequentially from above on the frame 112.

As described above, according to the present invention, since the plurality of stirring blades are inclined mutually and in the opposite direction with respect to the rotation axis, the storage flow in the storage hopper is fine grained ice or snow when the rotating stirring blades are stirred. Uniform stirring can be performed by reciprocating in the longitudinal direction of the rotary shaft, and fine ice or snow between the stirring blades can also obtain a good propulsion force in the stirring and conveying direction.

Claims (6)

From the rotary shaft 71 and the rotary shaft 71 which are substantially perpendicular to the main conveying direction of the fine granular ice or snow in the storage hop 23 having the fine grain ice or snow inlet 23a and the discharge port 23b. And a plurality of extending stirring blades 72 and rotation driving means 75 of the electric rotating shaft 71, wherein the plurality of stirring blades 72 (72a, 72b) are provided with the rotating shaft 71 in the entire rotational direction. Fine grain ice or snow supply apparatus, characterized in that the inclined cross section is inclined in opposite directions with respect to the rotation axis (71). The fine grain ice or snow feeding device according to claim 1, wherein the stirring blade (72) extends outward in a direction substantially perpendicular to the rotation shaft (71). 2. The fine grain ice or snow feeding device according to claim 1, wherein the plurality of stirring blades (72) are fixed such that each proximal end thereof is spirally positioned on the outer circumference of the rotation shaft (71). The fine granular ice or snow feeding device according to claim 1 or 3, wherein at least two rotary shafts (71) are provided in parallel. 5. The rotational direction according to claim 4, wherein the stirring blades 72 are set at the same position where the corresponding stirring blades 72 of the adjacent rotating shafts 71 substantially correspond to each other and are inclined in opposite directions with respect to the rotating shafts 71. Fine grain ice or snow feeding device, characterized in that it has a front surface The fine granular ice or snow feeding device according to claim 1, characterized in that the rotation driving means (75) has a means for synchronizing the plurality of rotation shafts (71).

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