JP2022160759A - Liquid spray device - Google Patents

Abstract

To provide a liquid spray device capable of effectively preventing a rapid dryness and cure of a surface of concrete while spraying the liquid on the surface of the concrete uniformly.SOLUTION: A liquid spray device 10 has a sill part 20 movable along at least one direction, a tank 30 loaded on the sill part 20 and storing liquid, a nozzle part 40 in communication with the tank 30 and discharging the liquid, a vibration generation part 50 loaded on the sill part 20 and generating the vibration and a levelling part 60 provided at the sill part 20 and vibrating by the vibration generation part 50.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a liquid spraying device for spraying a liquid such as a hardening retardant after concrete is placed.

In the concrete earth floor finishing work, first, a first step of pouring unhardened concrete into a construction site and a second step of performing finishing work while the poured concrete is hardening are carried out. In the first step, after the concrete is poured, the surface is smoothed. After the concrete leveled in the first step has hardened to the extent that workers can stand on it, the finishing work in the second step is carried out.

When concrete is applied in the open air, especially in midsummer, the concrete surface dries and hardens rapidly. In this case, problems such as delamination, unevenness, and cracks may occur on the surface of the concrete after finishing work. On the other hand, it is known to suppress the rapid hardening of the concrete surface by spraying a hardening retardant on the concrete surface (see, for example, Patent Document 1). Sprinkling water on the surface of concrete also has the effect of delaying rapid drying and hardening.

JP 2016-183526 A

When spraying liquids such as hardening retarders and water on the surface of concrete, it is necessary to use watering cans that retain the liquid, or to use high-pressure water sprinklers, and it cannot be said that the workability is good. . In addition, it is difficult to evenly spread the liquid over the surface of the concrete by such a spreading method. Furthermore, it is also required to more effectively suppress rapid drying and hardening of the surface of concrete.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid spraying device capable of effectively suppressing rapid drying and hardening of the surface of concrete while spraying liquid uniformly on the surface of concrete. and

In order to solve the above problems, the liquid spraying device according to the first aspect of the invention includes a base portion that is movable along at least one direction, a tank that is mounted on the base portion and stores liquid, and a tank that communicates with the tank. It has a nozzle portion for ejecting the liquid, a vibration generating portion mounted on the base portion to generate vibration, and a leveling portion provided on the base portion and vibrating by the vibration generating portion.

In the liquid spraying device according to the second aspect of the invention, the leveling section is arranged to extend along a direction orthogonal to the moving direction of the base section.

Further, in the liquid spraying device according to the third aspect of the invention, the nozzle portion opens toward the forward side in the movement direction of the base portion from the leveling portion.

Furthermore, in the liquid spraying device according to the invention of claim 4, the smoothing portions are provided on the front and rear portions of the base portion in the movement direction, respectively.

Further, in the liquid spraying device according to the invention of claim 5, the liquid stored in the tank is a concrete retarder.

According to the liquid spraying device of the present invention, the rapid drying and hardening of the concrete surface can be prevented by the vibration imparted to the concrete surface from the leveling portion and the liquid uniformly sprayed from the nozzle portion to the concrete surface. It can be effectively suppressed, and labor saving can be achieved.

1 is a perspective view of a liquid spraying device according to an embodiment; FIG. 1 is a side view of a liquid distribution device; FIG. 1 is a plan view of a liquid spraying device; FIG. FIG. 2 is an enlarged view of the vicinity of a nozzle portion in FIG. 1;

Embodiments of the present invention will be described in detail. The liquid spraying device 10 of the present embodiment is used when forming a floor with concrete, and is configured to apply vibration while spraying liquid on the surface of concrete.

1 shows a perspective view of a liquid spraying device 10 according to the present embodiment, FIG. 2 shows a side view of the liquid spraying device 10, and FIG. 3 shows a plan view of the liquid spraying device 10. As shown in FIG. As shown in these figures, the liquid spraying device 10 includes a base portion 20 having a handle portion 25, two tanks 30 mounted on the base portion 20, and piping portions 45 extending from the tanks 30. It has a nozzle portion 40 provided, a vibration generating portion 50 mounted on the base portion 20 to generate vibration, and a smoothing portion 60 provided on the base portion 20 and vibrated by the vibration generating portion 50 .

The pipe portion 45 including the base portion 20 and the nozzle portion 40, and the smoothing portion 60 can be formed of a metal material. However, it is also possible to form part of these parts with a resin material or the like. The tank 30 can be made of a resin material, but is not limited to this.

The base portion 20 has a generally rectangular shape in a plan view, and has a wheel portion 21 at its lower portion. The wheel portion 21 allows the base portion 20 to move in the movement direction shown in FIG. A handle portion 25 is attached to extend obliquely upward from the base portion 20 , and the operator pulls the handle portion 25 by hand to move the liquid spraying device 10 in the lateral direction of the base portion 20 . can be moved along. The wheel portion 21 may be configured so that the base portion 20 can be moved in directions other than the lateral direction.

The base portion 20 has tank holding portions 22 for holding the tanks 30 on both sides thereof. By placing the tank 30 on the tank holding portion 22, the tank 30 storing the liquid can be fixed. An injection port 31 is provided at the top of each tank 30 , and liquid can be injected into the tank 30 . In this embodiment, the liquid stored in the tank 30 is a concrete retarder.

Hardening retarders form insoluble or poorly soluble substances on the surface of cement particles to inhibit contact with water, or react with calcium ions or calcium hydroxide crystals to inhibit calcium growth. and can slow down the reaction of cement. Components of the curing retarder include, for example, phosphate, urea, oxycarboxylic acids (gluconic acid, citric acid, glucoheptonic acid, oxymalonic acid, tartaric acid, saccharic acid) and salts thereof, ketocarboxylic acids (2-ketoglutamic acid, 2 ketosuccinic acid, ketomalonic acid), or cellulose derivatives. However, the curing retarder is not limited to these, and may have other components.

A vibration generating section 50 is arranged between the tank holding sections 22 of the base section 20 . The vibration generator 50 has a rotating part such as a motor inside, and generates vibration by rotational motion. The vibration generated by the vibration generating section 50 vibrates the base section 20 , and the vibration is transmitted to the leveling section 60 , thereby vibrating the leveling section 60 .

The leveling portion 60 is arranged to extend along the longitudinal direction orthogonal to the lateral direction, which is the movement direction of the base portion 20 . The smoothing portions 60 are provided on the front and rear portions of the base portion 20 in the movement direction, respectively. The leveling portion 60 has a mounting portion 61 fixed to the base portion 20 . The attachment portions 61 are provided at a plurality of locations along the length direction of the leveling portion 60, three locations in the present embodiment. Vibration from the base portion 20 is transmitted to the leveling portion 60 via the attachment portion 61 .

The leveling unit 60 has a leveling plate 62 having a substantially L-shaped cross section. The leveling portion 62 is arranged in a downward inclination from the mounting portion 61 side toward the tip portion side so that the tip portion is at the same vertical position as the lower end portion of the wheel portion 21 . As a result, the leveling plate 62 is in contact with the surface of the concrete, and the vibration generated by the vibration generating section 50 can be transmitted to the surface of the concrete. The mounting portion 61 has a long hole 61a through which a bolt fixed to the base portion 20 is inserted (see FIG. 4), so that the vertical position of the leveling portion 60 with respect to the base portion 20 can be adjusted. The vertical position of the leveling unit 60 can be adjusted as needed.

FIG. 4 shows an enlarged view of the vicinity of the nozzle portion 40 in FIG. A pipe portion 45 extends from the tank 30 in the traveling direction of the liquid spraying device 10 . A first valve 46 is provided at the base of the pipe portion 45 . The tip side of the pipe portion 45 has a branch portion 47 that branches into two. A second valve 48 is provided on the distal end side of the branched portion 47, and a nozzle portion 40 opening downward is provided at the distal end.

With the first valve 46 and the second valve 48 open, the liquid stored in the tank 30 is discharged from the nozzle section 40 via the piping section 45 . Since the nozzle portion 40 is provided at the tip portion of the pipe portion 45 projecting from the tank 40 , the nozzle portion 40 is opened from the leveling portion 60 toward the moving direction of the base portion 20 . Therefore, the liquid discharged from the nozzle portion 40 is spread over the concrete surface and then spread by the leveling portion 60 .

Next, a method of spraying a liquid on the surface of concrete using the liquid spraying device 10 of this embodiment will be described. Before using the liquid spraying device 10, concrete is poured into the construction site in advance, the surface is flattened, and the concrete is hardened to the extent that a person can ride on it. The liquid spraying device 10 is filled with the liquid to be sprayed in the tank 30 . In this embodiment, the liquid is a set retardant, as described above. However, the liquid filling the tank 30 may be other liquid such as water.

When the preparation is completed, the operator causes the liquid spraying device 10 to enter the concrete surface. Then, the first valve 46 and the second valve 48 are opened to start spraying the liquid in the tank 30 from the nozzle portion 40, and the vibration generating portion 50 is operated to vibrate the leveling portion 60. FIG. In this state, by moving the liquid spraying device 10 on the surface of the concrete, the leveling unit 60 applies vibration while spraying the liquid on the surface of the concrete.

Excess water inside the concrete is pushed up to the surface by applying vibration to the surface of the concrete from the leveling unit 60.例文帳に追加In addition to this, the rapid drying and hardening of the concrete surface can be effectively suppressed by spraying the hardening retardant on the surface of the concrete. By suppressing the rapid drying and hardening of concrete, it is possible to prevent the occurrence of delamination, unevenness, and cracks on the concrete surface.

Re-vibration that vibrates concrete during hardening is widely used, but the liquid spraying device 10 of the present embodiment can perform re-vibration and hardening retardant spraying at the same time, so that the number of man-hours can be reduced. Labor saving in construction can be achieved.

The leveling section 60 extends along a direction orthogonal to the direction of movement of the base section 20, and the nozzle section 40 is opened toward the front side of the direction of movement of the base section 20 from the leveling section 60, so that The sprayed liquid immediately contacts the leveling unit 60 as the liquid spraying device 10 moves. The leveling unit 60 spreads the liquid on the surface of the concrete in the planar direction to even out the distribution of the liquid. As a result, the liquid can be uniformly distributed over the surface of the concrete, and the effect of suppressing rapid drying and hardening can be realized evenly.

Since the leveling parts 60 are provided at the front and rear parts of the base part 20 in the moving direction, it is possible to more reliably apply vibrations to the surface of the concrete as the liquid spraying device 10 moves, so that the concrete surface can be more effectively vibrated. It can improve the strength of the concrete and move excess water inside the concrete toward the surface to prevent rapid drying of the concrete surface.

After the liquid spraying device 10 is moved to apply vibration to the entire surface of the concrete and the liquid is sprayed, the work by the liquid spraying device 10 is finished and the concrete is further hardened. As described above, the liquid spraying device 10 of the present embodiment can simplify the process of finishing the surface of concrete, and can save labor.

Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be applied in various ways within the scope of its technical ideas.

REFERENCE SIGNS LIST 10 liquid spraying device 20 base portion 21 wheel portion 22 tank holding portion 25 handle portion 30 tank 31 inlet 40 nozzle portion 45 piping portion 46 first valve 47 branch portion 48 second valve 50 vibration generating portion 60 leveling portion 61 attachment Part 61a Long hole 62 Leveling plate

In order to solve the above problems, the liquid spraying device according to the first aspect of the invention includes a base portion that is movable along at least one direction, a tank that is mounted on the base portion and stores liquid, and a tank that communicates with the tank. A nozzle portion for discharging the liquid, a vibration generating portion mounted on the base portion to generate vibration, and a smoothing portion provided on the base portion and vibrating by the vibration generating portion, and stored in the tank The liquid applied is a hardening retarder for concrete, the leveling section is arranged to extend along a direction perpendicular to the moving direction of the base section, and the nozzle section extends from the tank to the leveling section. It is provided at the tip of a pipe portion extending farther in the direction of movement of the base portion, and opens downward .

Furthermore, in the liquid spraying device according to the invention of claim 2 , the smoothing portions are provided on the front and rear portions of the base portion in the movement direction, respectively.

Claims (5)

a base portion movable along at least one direction;
a tank that is mounted on the base and stores a liquid;
a nozzle portion that communicates with the tank and discharges the liquid;
a vibration generator mounted on the base and generating vibration;
a smoothing portion provided on the base portion and vibrated by the vibration generating portion;
A liquid sparging device having a 2. The liquid spraying device according to claim 1, wherein the leveling portion is arranged to extend along a direction orthogonal to the moving direction of the base portion. The liquid spraying device according to claim 1 or 2, wherein the nozzle portion opens toward a forward side in the moving direction of the base portion from the leveling portion. The liquid spraying device according to any one of claims 1 to 3, wherein the leveling portions are provided at front and back portions of the base portion in the moving direction. The liquid spraying device according to any one of claims 1 to 4, wherein the liquid stored in the tank is a concrete retarder.

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