JPH064981B2 - Device for adding liquid admixture in shotcrete - Google Patents

Description

TECHNICAL FIELD The present invention relates to a device for adding a liquid admixture in shotcrete.

[Prior Art] Conventionally, as a device for adding a liquid admixture of this type, as disclosed in Japanese Patent Publication No. 35-11621, a quick-setting admixture is added and mixed from multiple directions to dry-mix concrete to be pumped. There was something to do.

However, since the above-mentioned device simply mixes and mixes the quick-mixing agent into the dry-mix concrete that is pumped through the conduit, it not only has the drawback that uneven mixing is possible and uniform sprayed concrete is difficult, However, the quick-setting admixture ejected from the charging hole of No. 1 had irregularities, and there was a defect that homogeneous sprayed concrete could not be obtained.

Further, conventionally, as disclosed in Japanese Patent Laid-Open No. 55-114756, there has been proposed a device for adding a liquid additive to a dry mix concrete which is being fed in a state of being atomized with high pressure air.

However, in this conventional device, the additive was ejected from one direction, so the ejection balance was poor and there was uneven mixing.

Further, conventionally, JP-A-57-108365 and JP-A-5-108365
As disclosed in Japanese Patent Publication No. 7-209366, there is also one in which an admixture is jetted and added to dry mix concrete sent in a floating state by compressed air.

However, in the above apparatus, since the dry mix concrete must be transported to the admixture adding apparatus in a floating state, considerably strong compressed air must be sent, and the apparatus becomes large in size, which requires a large transportation energy. In particular, an admixture such as a quick-setting admixture has to be ejected in the vicinity of the spray nozzle, and as a result, the distance for conveying the dry mix concrete in a floating state is considerably long, and this method is not realistic.

[Problems to be Solved by the Invention] The present invention has been made in order to solve the drawbacks of the above-mentioned conventional apparatus, and its object is to add an admixture in a homogeneous state to dry mix concrete to obtain high quality. It is an object of the present invention to provide a device for adding a liquid admixture in sprayed concrete, which is not only capable of obtaining a sprayed concrete but also small in size, requires little power, and can be efficiently transported over a long distance.

[Means for Solving the Problems] The liquid admixture adding device for spraying concrete of the present invention is the outer periphery of a material pumping pipe connected in the middle of a material hose for pumping dry mix concrete from a spraying machine to a spraying nozzle. Attach an annular quick-setting adhesive pressure adjustment tank to the part,
An air pressure adjusting tank is attached immediately in front of the quick-setting admixture pressure adjusting tank, and a plurality of quick-setting admixing pipes and air pressure feeding pipes are branched from the outer portions of the front side surfaces of each of these tanks. The tip portion is connected to the material pressure feeding pipe in an inclined state, and a spray nozzle is provided in the quick-setting agent addition pipe,
A quick-setting admixture hose and an air hose are connected to the quick-setting admixture pressure adjusting tank and the air pressure adjusting tank, respectively.

In addition, the liquid admixture adding device in the sprayed concrete of the present invention has an annular quick-set admixture pressure on the outer peripheral portion of the material pumping pipe connected in the middle of the material hose that pumps the dry mix concrete from the spraying machine to the spraying nozzle. An adjustment tank is attached, and an air pressure adjustment tank is further attached to the outer peripheral portion of the quick-setting admixture pressure adjusting tank to form a double tank, and the front side surface of the quick-setting admixture pressure adjusting tank is formed into a conical shape. Multiple air pressure feed pipes branched from the air pressure adjustment tank,
The one side is connected to the conical front side, and the tip is connected to the material pressure feed pipe in an inclined state, and the front side of the quick-setting adhesive pressure adjusting tank and the air pressure feed pipe are joined. A quick-linking agent injection port is formed in the portion, and a quick-fastening agent hose and an air hose are connected to the quick-setting agent pressure adjusting tank and the air pressure adjusting tank, respectively.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 1 is a spray nozzle, which is a material hose 2.
It is attached to the tip of the. A water addition section 3 and a quick-setting agent addition section 4 are provided in the middle of the material hose 2.
A quick-setting admixture hose 5 and an air hose 6 are introduced into the quick-setting admixture adding section 4, and these hoses 5 and 6 are connected to a quick-setting admixture pump 7 and an air compressor 8, respectively.
Reference numeral 9 is a publicly known spraying machine, which is designed to pump dry mix concrete composed of cement and aggregate to the material hose 2.

As shown in FIG. 2, the quick-setting admixture adding section 4 is composed of a material pressure feed pipe 10, a quick-setting admixture pipe 11, a spray nozzle 12 and an air pressure feed pipe 13. The quick-setting admixture pipe 11 and the air pressure feeding pipe 13 are attached to the material pressure feeding pipe 10 in an inclined manner so that the atomized quick binding agent and compressed air are fed by the dry mix concrete 14 in the material pressure feeding pipe 10. Direction A
It is supposed to be added along with. The quick-setting agent hose 5 and the air hose 6 are connected to the quick-setting agent addition pipe 11 and the air pressure feeding pipe 13, respectively.

Therefore, first, the compressed air from the air compressor 8 is ejected from the air pressure feeding pipe 13 into the material pressure feeding pipe 10 through the air hose 6, and the dry mix concrete 14 pressure fed in the direction of the arrow A is stirred into the material pressure feeding pipe 10. Disperse.
Dispersed and suspended dry mix concrete 1
4, the quick-setting agent pressure-fed from the quick-setting agent pump 7 is sprayed and added in a mist form from the spray nozzle 12, and is dispersed and mixed in the dry mix concrete 14.

FIG. 3 shows an apparatus of an embodiment of the first invention of the present application for adding and jetting a quick-setting agent and compressed air from multiple directions around the material pressure-feeding pipe 10. An annular quick-setting adhesive pressure adjusting tank 15 is attached to the outer peripheral portion, and an air pressure adjusting tank 16 is attached immediately in front of the quick-setting adhesive pressure adjusting tank 15. A plurality (4 in this embodiment) of the quick-setting admixture pipe 11 and the air pressure feeding pipe 13 are branched from the front side outer portions of the quick-setting admixture pressure adjusting tank 15 and the air pressure adjusting tank 16. Their tips are attached to the material feed pipe 10. A quick-setting adhesive hose 5 and an air hose 6 are connected to the back side surfaces of the tanks 15 and 16, respectively. Further, connection flanges 10 a are formed at both ends of the material pressure feeding pipe 10 so as to be connected to the material hose 2.

Since the apparatus of this embodiment is configured as described above,
The compressed air that has entered the air pressure adjusting tank 16 from the air hose 6 is made uniform in pressure by the air pressure adjusting tank 16 and is ejected from the air pressure feeding pipe 13 into the material pressure feeding pipe 10 to homogenize the dry mix concrete 14. Disturb.

On the other hand, the quick-setting admixture that has entered the quick-setting admixture pressure adjusting tank 15 from the quick-setting admixture hose 5 is homogenized by the quick-setting admixture pressure adjusting tank 15 and is sprayed and added from the spray nozzle 12 to the homogeneous dry mix concrete 14. And dispersed and mixed.

FIG. 4 illustrates the atomization principle relating to the second invention of the present application. The air pressure feeding pipe 1 attached to the material pressure feeding pipe 10 is shown in FIG.
The tip of the quick-setting admixture pipe 11 is connected to the side portion of 3, and the quick-setting admixture injection port 17 is bored in the connecting portion. Therefore,
The quick-setting agent ejected from the quick-setting agent injection port 17 is atomized by the high-speed compressed air flow flowing in the air pressure feeding tube 13 and added to the material pressure feeding tube 10 together with the air flow, so that the compressed air It is simultaneously added to the dry mix concrete 14 which is dispersed in a floating state by the jetting force.

FIG. 5 and FIG. 6 show an apparatus of an embodiment of the second invention of the present application for uniformly adding the quick-setting admixture to the material pressure-feeding pipe 10 from multiple directions. This is a so-called double tank in which an air pressure adjusting tank 16 is further attached to the outer peripheral portion of the annular quick-setting adhesive pressure adjusting tank 15 attached to the section. The front side surface 15a of the quick-setting adhesive pressure adjusting tank 15 is formed into a conical shape, and a plurality of (three in this embodiment) air pressure feeding pipes 13 branched from the air pressure adjusting tank 16 are formed on the surface thereof. It is arranged with one side joined. A quick-linking agent injection port 17 is formed at the joint between the front side surface 15a and the air pressure feeding pipe 13.

Therefore, the quick-setting admixture and compressed air supplied from the quick-setting admixture hose 5 and the air hose 6 are respectively in the pressure adjusting tanks 15 and 1.
6 is adjusted to a uniform pressure, and the quick-setting agent ejected from the quick-setting agent injection port 17 is uniformly atomized by the high-speed compressed air flowing in the air pressure feeding tube 13, and pressure-fed in the material pressure feeding tube 10. The dry mix concrete 14 is added and dispersed and mixed.

The liquid admixture in the present invention includes an admixture supplied to a construction site in the form of powder and dissolved or dispersed at the construction site, and this admixture is a mixture of two or more admixtures. It may be a mixture.

Further, the quick-setting admixture pipe and the air pressure feeding pipe are not limited to those in the above-mentioned embodiment. For example, in the case of the embodiment shown in FIG. 3, the positions of the ejection ports may be displaced from each other or the ejection direction may be changed. The pressure pipe 10 may be inclined with respect to the radial direction to generate a spiral flow.

[Effects of the Invention] Next, the effects of the present invention will be listed.

(1) Attach an annular quick-setting admixture pressure adjusting tank to the outer periphery of the material pressure-feeding pipe connected in the middle of the material hose that sends dry mix concrete from the spraying machine to the spraying nozzle, immediately before the quick-setting admixture pressure adjusting tank. Attach an air pressure adjustment tank to the part, and branch the plurality of quick-setting agent addition pipes and air pressure feeding pipes from the outside of the front side of each of these tanks,
The tips of these pipes are connected to the material pressure-feeding pipe in an inclined state, a spray nozzle is provided in the quick-setting admixture adding pipe, and the quick-setting admixture hose is provided in each of the quick-setting admixture pressure adjusting tank and air pressure adjusting tank. Since the air hose is connected to the air hose, the compressed air that has entered the air pressure adjusting tank from the air hose is made uniform in pressure by the air pressure adjusting tank and is ejected from the air pressure feeding pipe into the material pressure feeding pipe to homogenize the dry mix concrete. Disturb. On the other hand, the quick-setting admixture that has entered the quick-setting admixture pressure adjusting tank from the quick-setting admixture hose is homogenized by the quick-setting admixture pressure adjusting tank and jetted from the spray nozzle to the homogeneous dry mix concrete to be dispersed and mixed. .

As described above, according to the present invention, immediately before the addition of the liquid admixture such as the quick-setting admixture and the dustproofing agent, the dry-mix concrete is dispersed in the floating state by the compressed air. Not only can air flow be carried over a distance to prevent a non-uniform condition, but
Since the admixture in a uniform state is jetted from multiple directions, it is possible to add the admixture to the dry mix concrete in a homogeneous state compared to the conventional liquid addition or air flow conveyance addition, and high quality spray concrete can be obtained. .

In addition, since the dry mix concrete is brought into a floating state immediately before the addition of the admixture, there is no need for transport energy required for air flow transport and a large-diameter quick-setting admixture hose as in the conventional case.

Furthermore, since the liquid admixture and compressed air are once introduced into the pressure adjustment tank and are jetted from the multiple directions to the outer peripheral part of the material feed pipe, the admixture and compressed air are always added in a uniformly adjusted state. It has the advantage of producing high quality shotcrete with low dust and low rebound.

(2) An annular quick-set adhesive pressure adjusting tank is attached to the outer circumference of the material pressure-feeding pipe connected in the middle of the material hose that sends dry mix concrete from the spraying machine to the spraying nozzle, and the outer circumference of the quick-setting admixture pressure adjusting tank A double tank is constructed by further attaching an air pressure adjusting tank to the section, and the front side surface of the quick-setting adhesive pressure adjusting tank is formed into a conical shape, and a plurality of air pressure feeding pipes branched from the air pressure adjusting tank. Is arranged in a state where one side thereof is joined to the conical front side surface and the tip end thereof is connected to the material pressure feeding tube in an inclined state, and the front side surface of the quick-setting adhesive pressure adjusting tank and the air pressure feeding tube are connected. Since the quick-setting admixture injection port was drilled at the joint part of and the quick-setting admixture hose and air hose were connected to the quick-setting admixture pressure adjustment tank and air pressure adjustment tank, respectively, With binder The compressed air is adjusted to a uniform pressure in each pressure adjusting tank, and the quick-setting agent ejected from the quick-setting agent injection port is uniformly atomized by the high-speed compressed air flowing in the air-pressure feeding tube, so that the material pressure feeding tube It is added to the dry mix concrete that is pumped and dispersed and mixed.

As described above, the present invention forms a double tank by further attaching an annular air pressure adjusting tank to the outer peripheral portion of the quick-setting admixture pressure adjusting tank, and conical the front side surface of the quick-setting admixture pressure adjusting tank. A plurality of air pressure feed pipes branched from the air pressure adjustment tank are formed on the surface of the air pressure feed pipe, and one end of the air pressure feed pipe is connected to the tip of the air pressure feed pipe. Since a quick-setting admixture injection port was drilled at the joint between the front side of the agent pressure adjustment tank and the air pressure feed pipe, the admixture just before being added to dry mix concrete was effectively atomized by compressed air with a very compact device. It is possible to obtain high quality sprayed concrete.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of a concrete spraying device, FIG. 2 is an explanatory view of a principle relating to the first invention of the present application, and FIG. 3 is an external view of an adding device showing an embodiment of the first invention of the present application, 4 is an explanatory view of the principle involved in the second invention of the present application, FIG. 5 is an external view showing an embodiment of the second invention of the present application, and FIG. 6 is a vertical sectional view of FIG. 1 ... Spray nozzle, 2 ... Material hose, 3 ... Water addition section, 4 ...
Quick-setting agent addition part, 5 ... quick-setting agent hose, 6 ... air hose, 7
… Fastener pump, 8… Air compressor, 9… Spraying machine,
DESCRIPTION OF SYMBOLS 10 ... Material pressure feed pipe, 10a ... Connection flange, 11 ... Quick-setting agent addition pipe, 12 ... Spray nozzle, 13 ... Air pressure feed pipe, 14
Dry mix concrete, 15 ... quick setting agent pressure adjusting tank, 15a ... conical front side surface, 16 ... air pressure adjusting tank, 17 ... quick setting agent inlet, A ... pressure feeding direction.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tsutomu Sato Tsutomu Sato 3-13-4 Miyazaki, Miyazaki-ku, Kawasaki City, Kanagawa Tokyu Miyazakidai Doering B314 (72) Inventor Kenji Furuya 2-10 Nagata Minamidai, Minami-ku, Yokohama-shi, Kanagawa Prefecture No. 1005 (72) Inventor Hiroshi Miyashita 173-2 Okada, Samukawa-cho, Takaza-gun, Kanagawa (56) Reference JP-A-55-114756 (JP, A) JP-A-57-108365 (JP, A) JP-A-SHO 57-209366 (JP, A) Japanese Patent Publication Sho 35-11621 (JP, B1)

Claims (2)

[Claims] 1. An annular quick-setting agent pressure adjusting tank 15 is attached to the outer periphery of a material pumping pipe 10 connected in the middle of a material hose 2 for pumping dry mix concrete 14 from a spraying machine 9 to a spraying nozzle 1. Fastener pressure adjustment tank 15
The air pressure adjusting tank 16 is attached to the front portion of each of the tanks 15 and 16, and a plurality of quick-setting agent adding pipes 11 and air pressure feeding pipes 13 are branched from the outer portions of the front side surfaces of these tanks 15 and 16, respectively. The tip of 13 is the above-mentioned material pressure feeding pipe 1
0 is connected in an inclined state, and a spray nozzle 12 is provided in the quick-setting admixture pipe 11, and the quick-setting admixture pressure adjusting tank 15 is provided.
And an air pressure adjusting tank 16 to which a quick-setting admixture hose 5 and an air hose 6 are connected, respectively, for adding a liquid admixture in sprayed concrete. 2. An annular quick-setting agent pressure adjusting tank 15 is attached to the outer peripheral portion of a material pumping pipe 10 connected in the middle of a material hose 2 for pumping dry mix concrete 14 from a spraying machine 9 to a spray nozzle 1. Fastener pressure adjustment tank 15
An air pressure adjusting tank 16 is further attached to the outer peripheral portion of the to form a double tank, and the front side surface 15a of the quick-setting adhesive pressure adjusting tank 15 is formed into a conical shape, and is branched from the air pressure adjusting tank 16. The plurality of air pressure feeding pipes 13 are arranged with one side thereof joined to the conical front side surface 15a, and the tips thereof are connected to the material pressure feeding pipes 10 in an inclined state to adjust the quick-setting adhesive pressure. Front side 15 of tank 15
At the joint between a and the air pressure feeding pipe 13, a quick-setting agent injection port 17
And a quick-setting admixture hose 5 and an air hose 6 are connected to the quick-setting admixture pressure adjusting tank 15 and the air pressure adjusting tank 17, respectively, to add a liquid admixture in sprayed concrete.