JP2018145680A - Curing system and curing method for concrete bucket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curing system of a concrete bucket and a curing method capable of easily curing concrete charged in a vessel even in a case of a long transportation time.SOLUTION: Concrete for a concrete bucket 10 is charged through a charging opening 26 of a vessel 12. A curing system 40 comprises: a mist spray 42 to spray mist on the vessel 12; a charging opening cover 44 with shading effect and moisture retention effect to cover the charging opening 26; and a side cover 46 to cover at least a part of a side of the vessel 12. A magnet sheet 74 is embedded in the charging opening cover 44 and is detachably attached to the vessel 12 with magnetic force. The mist spray 42 comprises a main body 50 including a pump, a conduit line 56 to supply water, and a plurality of nozzles 58 arranged on the conduit line 56 to spray mist. The conduit line 56 forms an annular part 56a at an upper part of the charging opening 26.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a concrete bucket for transporting ready-mixed concrete that has been carried into a construction site or adjusted at the construction site to a placement site, and prevents changes in properties of the ready-mixed concrete stored in the container. The present invention relates to a curing system and a curing method for a concrete bucket.

  The concrete bucket is used to carry the ready-mixed concrete (including mortar, hereinafter simply referred to as concrete), which is carried into the construction site or adjusted at the construction site, to the placement site. For example, concrete is poured into the container from the chute of the agitator car through the concrete bucket inlet, and then the concrete bucket is suspended by a crane or the like and transported to the placement site. The concrete is discharged from the lower outlet. It is cast. Although the concrete bucket has a simple configuration, it has a portability applicable to a narrow space where an agitator vehicle or a pump vehicle cannot enter, and has a feature that concrete piping is unnecessary. There are various sizes and types of concrete buckets, also called concrete and concrete hopper, but many are simple, light and compact. A concrete bucket is disclosed in Patent Document 1, for example.

  On the other hand, generally, since concrete deteriorates in quality when stored in a hot environment for a long period of time, Patent Document 2 discloses a technique for cooling concrete during movement with an agitator vehicle. Further, as another cooling technique, Patent Document 3 discloses a technique in which air is cooled by using vaporization heat by spraying an extremely fine mist so as to cool a person without getting a passerby wet.

JP-A-9-21232 JP 2003-94425 A JP-A-6-170293

  By the way, recently, there is an increasing demand for placing concrete at a height of more than 50m due to the construction of bridges and high-rise buildings that straddle deep valleys in the mountains. Vertical pumping using vertical piping is performed at such heights. On the other hand, there is a disadvantage that the properties of the concrete are not stabilized due to the high pressure. On the other hand, if the concrete bucket is suspended and transported by the tower crane, it is not necessary to apply pressure to the concrete.

  However, it takes a certain amount of time to lift the concrete bucket to an extremely high place even if a tower crane is used, and there is a concern that the quality of the concrete may deteriorate in a hot environment. Conventionally, there were few examples of applying concrete buckets to extremely high places, so no measures were taken against concrete curing during crane transportation.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a curing system and a curing method for a concrete bucket that can easily cure the concrete put into the container even if the conveyance time is long. And

  In order to solve the above-described problems and achieve the object, the concrete bucket curing system according to the present invention is applied to a concrete bucket into which concrete is poured from a container inlet, and has a light-shielding property covering the inlet. It has an input port cover and a mist sprayer for spraying mist onto the container.

  The method for curing a concrete bucket according to the present invention is a method in which concrete is poured from a container inlet in a concrete bucket, the inlet is covered with a light-shielding inlet cover, and mist is sprayed onto the container by a mist sprayer. However, the concrete bucket is transported.

  As described above, by applying the mist sprayer and the inlet cover in combination, it is possible to easily cure the concrete in the container even when the transport time is long, to prevent property change, and to maintain the slump property. .

  The charging port cover has a magnet and is convenient for repeated loading of concrete when it can be attached to and detached from the concrete bucket by magnetic force.

  If the inlet cover has moisture retention, the concrete in the container can be kept moist.

  When the side cover that covers at least a part of the side surface of the container is provided, the property change of the concrete in the container can be further prevented.

  The mist sprayer includes a main body including a pump that pumps water, a pipe that supplies the water from the pump, and a nozzle that is provided in the pipe and sprays the mist. If it is arranged in a ring or C shape at the top of the mouth and a plurality of the nozzles are provided, the container can be cooled appropriately.

  When the particle diameter of the mist is 50 μm or less, the cooling effect by evaporation of the mist is high, and when the inlet cover has an evaporation preventing property, the inside of the container can be kept wet, and the mist sprayer and the inlet cover Can keep temperature and humidity suitable for curing while sharing functions.

  In the concrete bucket curing system and curing method according to the present invention, by applying a combination of a mist sprayer and an inlet cover, the concrete in the container can be easily cured to prevent property changes even when the transport time is long. it can.

FIG. 1 is a perspective view showing a concrete bucket curing system and a concrete bucket according to the present embodiment. FIG. 2 is a perspective view showing a mist sprayer and a concrete bucket. FIG. 3 is a plan view showing the insertion port cover. FIG. 4-1 is a perspective view showing an input port cover attached to a concrete bucket of a certain size. FIG. 4B is a perspective view of the inlet cover attached to the concrete buckets of different sizes. FIG. 5 is a plan view showing the side cover.

  Embodiments of a concrete bucket curing system and curing method according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  As shown in FIG. 1, a concrete bucket curing system 40 according to the present embodiment is applied to a standard cylindrical vertical-type concrete bucket 10, and includes a mist sprayer 42, an inlet cover 44, and a side cover 46. And have. First, the concrete bucket 10 will be described. The concrete bucket 10 is used to carry concrete, which is carried into the construction site or adjusted at the construction site, to the placement site with a crane or the like.

  As shown in FIG. 2, the concrete bucket 10 includes a container 12 in which concrete is stored, three (or about four) struts 14 that support the container 12, and the struts 14 fixed to the ground or striking. It has a grounding ring 16 placed on the installation site and a hanging metal fitting 18 suspended by a crane or the like. The suspension fitting 18 has a truss structure, and is rotatably attached to the protruding pieces 20 provided at both upper ends of the container 12, and the top portion thereof can be lifted by a crane or the like (not shown).

  The container 12 includes an upper cylindrical portion 22 and a reduced portion 24 having a shape reduced in a funnel shape downward from the cylindrical portion 22. The upper surface of the cylindrical portion 22 is opened to form an inlet 26. The lower end of the reduced portion 24 forms an elongated rectangular discharge port 28.

  The container 12 is provided with a pair of opening / closing plates 30 that open and close the discharge port 28, a lever 32 that operates the opening / closing plate 30 in an interlocking manner, and a hook 33 that locks the lever 32. The pair of opening / closing plates 30 are opposed to each other, and are synchronized by a link 34 to open / close the discharge port 28 by rotating about individual support shafts 36a and 36b. The hook 33 is attached to the side surface of the cylindrical portion 22 so as to be movable up and down, and locks the lever 32 with a hook portion at the tip. In a state where the lever 32 is locked by the hook 33, the opening / closing plate 30 closes the discharge port 28, and the opening / closing plate 30 opens the discharge port 28 by manually removing the lever 32 from the hook 33 and lowering the lever 32 downward.

  The container 12 can store the concrete input from the input port 26 with the discharge port 28 closed. When the lever 32 is lowered and the discharge port 28 is opened, the concrete inside is discharged and placed. Is done.

  The grounding ring 16 is set to have substantially the same diameter as the cylindrical portion 22 of the container 12, and the concrete bucket 10 can be stably placed. The concrete bucket 10 is mainly composed of iron and steel.

  The concrete bucket curing system 40 is applied to such a concrete bucket 10 as an example, and includes a mist sprayer 42 that sprays mist on the inlet 26 and its periphery, an inlet cover 44 that covers the inlet 26, and the container 12. And a side cover 46 covering the side surface. Hereinafter, the mist sprayer 42, the inlet cover 44, and the side cover 46 will be described in order.

  As shown in FIG. 2, the mist sprayer 42 includes a main body 50, a water tank 52, a battery 54, a conduit 56, a plurality of nozzles 58, a box 60 that houses the main body 50, the water tank 52, and the battery 54. A variable-length pole 62 that supports the box 60, a fixture 64 that fixes the box 60 to the left and right struts 14, and three pipe poles 66 that support the pipe 56 at the top of the container 12. .

  The main body 50 is driven by the electric power of the battery 54, and pressurizes and supplies the water in the water tank 52 to the pipeline 56 by an internal pump. The battery 54 can be charged and replaced. The water tank 52 can be supplied with water or exchanged. The pipe 56 has a lower end connected to the main body 50 and an upper portion arranged in an annular shape (or C-shape) at the upper portion of the inlet 26, and a plurality of nozzles 58 (for example, two nozzles) are arranged at substantially equal intervals in the annular portion 56a. 10). Depending on conditions, not only the upper portion of the inlet 26 but also some of the nozzles 58 may be provided so as to face the reducing portion 24 or the like. The annular portion 56a is set to have substantially the same diameter as the insertion port 26, and is fixed at three places by a pipe pole 66 and a rubber orthogonal bush 68, and the height is variable. The lower end of the pipe pole 66 is fixed to the fixture 64 or the support column 14 and protrudes upward from the insertion port 26.

  The lower surface of the box 60 is supported by the grounding ring 16 via a variable length pole 62, and the left and right sides of the box 60 are detachably fixed to the pillars 14 on both sides via a fixture 64 having an arc-shaped elastic plate. It can be attached to and detached from various types of concrete buckets 10. The fixture 64 holds the elastic plate and the support column 14 between two plates. The box 60 may have a cover that covers the main body 50, the water tank 52, and the battery 54.

  Further, as understood from FIG. 2, the box 60 for storing the main body 50, the water tank 52 and the battery 54 is provided near the outside of the reduction portion 24 in the container 12, and most of them are arranged below the inlet 26. In addition, the annular portion 56a of the pipe 56 is also set to have the same diameter as that of the inlet 26. Therefore, the mist sprayer 42 has a compact configuration that hardly protrudes from the concrete bucket 10 in a plan view, has no trouble in applying the concrete bucket 10 to a narrow space, and is easy to handle.

  In the mist sprayer 42, the main body 50, the water tank 52, and the battery 54 are integrally formed with the concrete bucket 10, and it is not necessary to connect an electric wire or a hose to the outside, and the portability is not impaired. When some other electric device is provided in the concrete bucket 10, the battery 54 may be shared.

  The mist sprayed from the nozzle 58 is a fine particle having a particle size of 50 μm or less, preferably 20 μm or less. Such an extremely fine mist is also called an air washer, dry fog or dry mist (registered trademark), and can quickly evaporate to lower the temperature by its heat of vaporization, and does not wet the container 12 more than necessary. Such ultra-fine mist is characterized by high cooling energy efficiency and no exhaust heat. The mist sprayer 42 basically cools the mist by spraying the mist toward the container 12 while the concrete is being transported by the concrete bucket 10. It is also effective to cool the inside of the container 12 in advance by operating from before or during charging.

  Next, as shown in FIG. 3, the slot cover 44 is provided with eight cuts 70 in a radial pattern in the periphery, and eight peripheral pieces 72 divided by the cuts 70 are formed. 72 overlap each other except for a part on the outside. A flexible magnet sheet (magnet) 74 is embedded in three sides forming each peripheral piece 72. The inlet cover 44 has a white or silver exposed surface, and has light shielding properties and moisture retention properties. By being light-shielding and being white or silver, it is possible to reflect sunlight and suppress an increase in temperature inside the container 12. Furthermore, the container 12 can be kept moist by being moisturizing. Here, moisture retention means including materials such as urethane, non-woven fabric, cotton, paper, straw, and felt that can retain moisture. The inlet cover 44 may be wetted in advance prior to use. The inlet cover 44 can also prevent foreign matter from entering the container 12.

  The insertion port cover 44 can be appropriately selected and processed from commercially available concrete curing sheets (or mats). There are various types of concrete curing sheets with functions such as light shielding, moisture retention, heat insulation, heat retention, and evaporation prevention. The types and abilities of the mist sprayer 42, weather, temperature, humidity, concrete type, and transport time It is advisable to select appropriately according to the above. Of course, materials other than the concrete curing sheet can be used with suitable specifications.

  As shown in FIG. 4A, the insertion port cover 44 covers the insertion port 26 at its center by adsorbing the bent peripheral piece 72 to the side surface of the cylindrical portion 22 of the iron material with the magnet sheet 74. Can do. Further, two of the eight cuts 70 are 180 degrees from the center so as to avoid the protruding pieces 20 and can cover the inlet 26 stably with almost no gap. Since the inlet cover 44 is attached to the container 12 by the magnetic force of the magnet sheet 74, it can be attached and detached quickly and easily. The concrete bucket 10 is expected to be filled with concrete many times during a day's construction, but the loading port cover 44 is convenient because it can be quickly attached and detached each time it is loaded.

  As shown in FIG. 4B, the insertion port cover 44 can also be applied to a large-sized cylindrical portion 76. That is, the adjacent peripheral pieces 72 overlap each other at the cut portions 70 at both ends, and no gap is generated even if the cylindrical portion 76 is large. In addition, since the magnet sheet 74 is embedded in the overlapping portion, the magnetic sheet 74 is brought into close contact with each other due to the attractive force, and almost no gap is generated. Thus, the insertion port cover 44 can be applied to the cylindrical portions 22 and 76 of various sizes without any special adjustment. Moreover, it is applicable not only to a cylindrical type but also to a square cylindrical type.

  By the way, when the mist sprayer 42 is an extremely fine dry mist as described above, the cooling function is excellent, but the dry mist hardly wets the inlet cover 44, so the spray target object is moistened. There is not much ability to make. Therefore, in order to suppress the evaporation of the moisture of the concrete inside the container 12, the inlet cover 44 may be made of a material that has moisture retention and anti-evaporation properties. On the other hand, when the mist produced by the mist sprayer 42 is relatively large particles and the spray target can be wetted, the inlet cover 44 may be used as a moisture transmission type to actively replenish water. .

  Next, as shown in FIG. 5, the side cover 46 includes a horizontally elongated rectangular band 80, a plurality of lower pieces 84 divided by longitudinal cuts 82, and a center provided at the center of the upper side of the band 80. It has a string 86 and several end strings 88 provided side by side near both ends. The lower piece 84 has a tapered shape extending downward from the band 80. The lateral width of the side cover 46 is somewhat longer than the circumferential length of the standard cylindrical portion 22. For example, about 12 pieces of the lower pieces 84 are provided. Adjacent ones overlap with each other on the upper side, and a slight gap is provided on the lower side. A flexible magnet sheet 90 is embedded in the three sides forming the band 80 and the three sides forming each lower piece 84. A part of the band 80 is provided with a lateral slit 92 through which the hook 33 (see FIG. 2) is inserted.

  As shown in FIG. 1, the side cover 46 has a central string 86 fixed to one protruding piece 20, and an end string 88 having an appropriate position is fixed to the other protruding piece 20. It attaches so that the upper side surface of the container 12 in the bucket 10 may be covered. The band 80 mainly covers the cylindrical portion 22 (see FIG. 2), but the lateral width of the side cover 46 has a margin and can be applied regardless of the diameter of the cylindrical portion 22.

  The lower piece 84 mainly covers the upper portion of the reduced portion 24 (see FIG. 2), but is attached with almost no gap by the cut 82 and the tapered shape of the reduced portion 24. Further, the upper portion of the lower piece 84 can cover the lower portion of the cylindrical portion 22, and can cope with the difference in height of the cylindrical portion 22. Three struts 14 may be avoided at any break 82 or any lower piece 84 may ride on the strut 14.

  The lower part of the reduction part 24 is exposed and does not hinder the operation of the opening / closing plate 30 or the concrete discharge. The hook 33 can be inserted into the horizontal slit 92 regardless of its horizontal position. The side cover 46 can be fixed to the container 12 quite strongly by the attractive force of the magnet sheet 90, but is more securely fixed by the central string 86 and the end string 88 to prevent the fall. Unlike the loading port cover 44, the side surface cover 46 does not have to be attached and detached every time the concrete is thrown in, and may be left worn for a day or a predetermined construction period.

  The side cover 46 is preferably made of the same material as the inlet cover 44, that is, the exposed surface is white or silver, and has light shielding properties and moisture retention properties. Further, it may be appropriately selected depending on the type and ability of the mist sprayer 42, weather, temperature, humidity, concrete type, transport time, and the like. Since the side cover 46 is affixed to the side surface of the container 12, unlike the inlet cover 44, the evaporated water from the concrete inside does not directly hit. Therefore, it is preferable to select a material that is particularly excellent in heat insulation than the function of retaining moisture. The container 12 is an iron material having a high heat transfer property, but heat transfer from hot outside air can be prevented by the side cover 46 having a high heat insulating property. By using such a side cover 46, the property change of the concrete in the container 12 can be further prevented.

  By the way, concrete curing is generally a means to maintain and manage temperature and humidity in order to properly proceed the hydration reaction after placing, while holding sufficient moisture necessary for the hydration reaction, In summer, cooling is required so that the hydration reaction does not proceed too rapidly. On the other hand, it is important to maintain appropriate temperature and humidity even before placing, and in this application, curing is defined in a broad sense including before placing. In the concrete bucket curing system 40 according to the present embodiment, the mist sprayer 42 is mainly responsible for the cooling function, the inlet cover 44 is primarily responsible for the moisture retention function, and the side cover 46 is primarily responsible for the thermal insulation function. Thus, the concrete in the container 12 can be appropriately cured by the interaction of the function sharing.

  Although the concrete bucket curing system 40 has been described, the concrete bucket curing method according to the present embodiment is a method of conveying concrete by the concrete bucket 10 to which the curing system 40 is applied. That is, the mist sprayer 42 and the side cover 46 are attached to the concrete bucket 10, the concrete is charged from the charging port 26, the charging port 26 is covered with the charging port cover 44, and the mist sprayer 42 is operated by a predetermined operation to operate the nozzle 58 In this method, the concrete bucket 10 is transported by suspending suspending hardware 18 with a crane or the like. The mist sprayer 42 may be operated from before or during the concrete charging to cool the inside of the container 12 in advance before covering the charging port 26 with the charging port cover 44.

  As described above, according to the concrete bucket curing system 40 and the curing method according to the present embodiment, by applying the mist sprayer 42, the inlet cover 44, and the side cover 46 in combination, the conveyance time becomes longer. In addition, the concrete in the container can be easily and appropriately cured to prevent property changes and maintain the slump property. Moreover, it is a simple and lightweight structure, and the portability of the concrete bucket 10 is not impaired. Furthermore, the curing system 40 is detachable and easy to operate, and has versatility applicable to concrete buckets 10 of various sizes and types. Depending on the conditions, any one or more of the mist sprayer 42, the inlet cover 44, and the side cover 46 may be omitted. For example, when cooling is unnecessary in winter, the mist sprayer 42 may be omitted.

  The present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Concrete bucket 12 Container 14 Support | pillar 16 Grounding ring 18 Suspension metal fitting 20 Protrusion piece 22,76 Cylindrical part 24 Reduction part 26 Input port 28 Outlet port 30 Opening / closing plate 32 Lever 33 Hook 34 Link 36a, 36b Spindle 40 Curing system 42 Mist sprayer 44 Port cover 46 Side cover 50 Main body 52 Water tank 54 Battery 56 Pipe line 56a Annular part 58 Nozzle 60 Box 62 Variable length pole 64 Fixing tool 66 Pipe pole 68 Orthogonal bush 70, 82 Cut 72 Peripheral piece 74, 90 Magnet sheet 80 Band 84 Lower piece 86 Center string 88 End string 92 Horizontal slit

Claims (7)

Applied to concrete buckets into which concrete is poured from the container inlet,
A light-blocking inlet cover that covers the inlet;
A mist sprayer for spraying mist on the container;
A concrete bucket curing system comprising: The curing system for concrete buckets according to claim 1,
A concrete bucket curing system, wherein the inlet cover has a magnet and is attachable to and detachable from the concrete bucket by a magnetic force. In the curing system for concrete buckets according to claim 1 or 2,
The concrete cover curing system, wherein the inlet cover has moisture retention. In the curing system of the concrete bucket of any one of Claims 1-3,
A curing system for concrete buckets, comprising a side cover that covers at least a part of a side surface of the container. In the curing system of the concrete bucket of any one of Claims 1-4,
The mist sprayer has a main body including a pump that pumps water, a pipe that supplies the water from the pump, and a nozzle that is provided in the pipe and sprays the mist.
A curing system for a concrete bucket, wherein the pipe line is arranged in an annular shape or a C shape at an upper portion of the charging port, and a plurality of the nozzles are provided. In the curing system of the concrete bucket of any one of Claims 1-5,
The mist has a particle size of 50 μm or less,
A concrete bucket curing system, wherein the inlet cover has an evaporation preventing property. Concrete is poured from the container inlet in the concrete bucket,
Cover the insertion slot with a light-blocking slot cover,
A concrete bucket curing method, wherein the concrete bucket is conveyed while spraying mist onto the container by a mist sprayer.

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