JPH10266569A - Method and equipment for spraying material for construction work - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide spraying method and equipment, by which the separation of a material for construction work such as mortar is prevented by promoting the mixing of air and the material, the quality of a spraying surface is improved and transport efficiency and speed can be enhanced. SOLUTION: Compressed air to which revolving torque is given is blown in from the rear section of a transport pipe 18, and a material for construction works is transported while promoting the mixing of the material for construction works and air. Compressed air is blown into a transport pipe 18 from the outside from an auxiliary pipe 33 from one or more of places on its midway to the transport pipe 18, and the transport of the material for construction works in the transport pipe 18 is accelerated. Compressed air is given revolving torque by obliquely spraying compressed air from the outside into the transport pipe 18 in the axial center direction of the transport pipe 18, and the mixing of the material for construction works and air is expedited.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention sprays construction materials such as concrete, mortar, and greening soil when performing protection work, greening work, building work, etc. on rock surfaces, road side slopes, concrete structures, and the like. The method and the spraying device.

[0002]

2. Description of the Related Art FIG. 4 shows a schematic configuration of a general construction material spraying plant. In FIG. 4, sand 1 as an aggregate is put in a sand hopper 2 and a sand hopper vibro 3
Through the belt conveyor 4. The amount of the sand 1 dropped on the belt conveyor 4 is measured by an aggregate measuring device 5, and a certain amount of sand is dropped on the belt conveyor 6. A predetermined amount of cement 7 is put on the belt conveyor 6,
The sand 1 is sent to the spraying machine 8. The operation of starting and stopping the conveyors 4 and 6 is performed by the control panel 10.

On the other hand, water in a water tank 11 is pumped up by a water pump 12 and supplied to a spraying machine 8 via a water hose 13. The amount of water pumped by the water pump 12 is controlled by the water control panel 1
4. The control panels 10 and 14 are supplied with power from a generator 15. Then, the cement 7 sent by the belt conveyor 6, the sand 1, and the water sent by the water hose 13 are mixed in the spraying machine 8. In the figure, reference numeral 21 denotes a shovel car for transporting materials such as sand 1 and cement 7.

As shown in FIG. 5, the spraying machine 8 comprises two upper and lower cylindrical tanks 2 having stirring blades 24, respectively.
2 and 23, and a lid 25 that shields between the upper and lower tanks 22 and 23. Compressed air is introduced into the lower tank 23 from the compressor 16 via the hoses 17 and 17a, and the concrete mixed in the tank 23 is pressurized by the compressed air, and the lower outlet 23 of the tank 23 is compressed.
6 is pushed out into the transport pipe 18 and at the same time, the hose 17
By supplying compressed air from the back of the transport pipe 18 through the discharge port 26 from the branch pipe 17 b branched from the pipe, the construction material is transported together with the compressed air through the transport pipe 18, and the nozzle 19 attached to the tip of the transport pipe 18. The worker 2
0 performs the spraying operation.

When the amount of construction material in the lower tank 23 is reduced to a predetermined level or less, the lid 25 is opened while the upper tank 22 is sealed and pressurized to open the upper tank 22. The construction material is introduced into the lower tank 23 to continue spraying the construction material,
5, the upper lid (not shown) of the upper tank 22 is opened, sand, cement and water from the aggregate weighing device 5 are introduced into the upper tank 22, and the upper lid is closed again and mixed under a pressurized state. .

As shown in FIG. 2A, for example, the transport pipe 18 is formed by connecting a plurality of rubber hoses each having an inner diameter of 38 mm to 50 mm and a length of 20 m in the axial direction via a joint 50. The nozzle 19 is attached to the tip.

[0007] In the spraying machine 8 configured as described above, the material stirred by the stirring blades 24 in the tank 23 is pressurized by the compressed air sent from the hose 17a,
It is extruded from the discharge port 26 into the transport pipe 18. Transport pipe 1
The material extruded into 8 is sent toward nozzle 19 by compressed air sent from hose 17b.

[0008]

However, according to the above-described spraying method and apparatus, the construction material is transported by the transport pipe 18.
When moving inside by air flow, if the flow becomes a collective flow or a partial flow, the material is sieved and separated into particles of the same property to lower the construction quality, and the viscosity, particle size,
There is a problem that the transport efficiency is affected by the variation, specific gravity and properties of the grains.

Conventionally, since the air supplied to the transport pipe 18 is only from the branched hose 17b, energy loss occurs due to the resistance in the pipe, and the speed of the compressed air is reduced. As a result, the efficiency of feeding the material is influenced by the viscosity, the particle size, the variation of the particles, the diameter, the length, and the material of the hose 17.

[0010] The present invention has been made in view of the above-mentioned problems, and is a construction capable of promoting the mixing of air and a material to prevent the separation of the material, improving the quality of a sprayed surface, and improving transport efficiency. It is an object of the present invention to provide a method and an apparatus for spraying a material for use.

Further, the present invention increases the speed of construction material in a transport pipe, and regardless of a change in viscosity, particle size, grain variation, diameter, length, material, etc. of the transport material,
It is an object of the present invention to provide a spraying method and apparatus capable of performing uniform and smooth transportation of construction materials.

[0012]

SUMMARY OF THE INVENTION According to the present invention, a tank in which a construction material including powder and granules is accumulated is pressurized with compressed air to extrude the construction material from a discharge hole and extruded from the discharge hole. The construction material is blown into the transportation pipe with compressed air, and the construction material is sprayed on the construction surface from the nozzle attached to the tip of the transportation pipe. The construction material is transported while blowing the applied compressed air to promote mixing of the construction material with the air (claim 1).

Further, the present invention is characterized in that compressed air is blown into the transport pipe from the outside at one or more points in the middle of the transport pipe to promote the transport of construction materials in the transport pipe. 2).

Further, according to the present invention, compressed air is blown from the outside into the transport pipe obliquely with respect to the axial direction of the transport pipe, so that a rotational force is applied to the compressed air to separate the construction material from the air. It is characterized by promoting mixing (claim 3).

Further, according to the present invention, from the rear of the transport pipe,
The construction material is transported while blowing the compressed air to which the rotational force is applied to promote the mixing of the construction material and the air, and is also transported by blowing compressed air from the middle of the transportation pipe into the transportation pipe from outside. The invention is characterized in that the transportation of construction materials in the pipe is promoted (claim 4).

Further, according to the present invention, from the rear of the transport pipe,
While transporting the construction material while blowing the compressed air to which the rotational force is applied to promote the mixing of the construction material and the air, the compressed air is externally introduced into the transport pipe, and is inclined with respect to the axial direction of the transport pipe. By blowing the compressed air into the compressed air, a rotational force is applied to the compressed air to promote mixing of the construction material and air (claim 5).

Further, according to the present invention, a construction material containing powdered and granular materials is accumulated in a tank and compressed air is used to extrude the construction material from a discharge port, and the construction material extruded from the discharge port. Is blown into the transport pipe with compressed air, and a construction material spraying device that sprays the construction material from the nozzle attached to the tip of the transport pipe to the construction surface is provided at the rear of the transport pipe in communication with the transport pipe. A compressed air supply pipe is provided, and a spiral plate for applying a rotational force to the compressed air is inserted into the compressed air supply pipe, and an auxiliary pipe for supplying compressed air is provided in the transport pipe, and a part of the transport pipe is provided. A joint for blowing compressed air supplied through the auxiliary pipe into the transport pipe, wherein the joint has an air outlet formed obliquely to the axial direction of the transport pipe. (Claim 6).

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the construction material spraying apparatus of the present invention will be described below with reference to the drawings.

FIG. 1 is a view showing an example of a connection structure of piping for supplying compressed air to a spraying machine for carrying out the spraying method of the present invention, and FIG. 2 (B) is a side view showing a connection structure of a transport pipe and an auxiliary pipe. FIG. 3A is a cross-sectional view showing a configuration of a connection portion between the transport pipe and the auxiliary pipe, FIG. 3B is a front view showing a configuration of a nozzle piece mounted in a joint of the transport pipe, and FIG. C) is FIG.
It is a side view of (B). In these figures, FIG.
(A), portions corresponding to those of the conventional example shown in FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

In FIG. 1, a compressed air supply pipe at the rear of the transport pipe 18, that is, a pipe 31a containing a spiral plate 31 is inserted upstream of the discharge port 26 of the branched hose 17b. A branch pipe 32 is connected upstream of the branch point of the hose 17, and an auxiliary pipe 33 is connected to a downstream end of the branch pipe 32. Reference numeral 3 shown in FIG.
4, 35, 36 and 37 are hoses 17 and 17a, respectively.
17b and a valve provided in the branch pipe 32.

The auxiliary pipe 33 is provided alongside the transport pipe 18 as shown in FIG. 2A, and a joint 27 of the transport pipe 18 and a joint 38 of the auxiliary pipe 33 are connected via a valve 39. A valve 40 is provided at the downstream end of the auxiliary pipe 33.

In FIG. 3, the joint 27 of the transport pipe 18 is
Male joint 27 provided on the outer periphery of the end of transport pipe 18 on the upstream side
a, a female joint 27e provided on the outer periphery of the end of the transport pipe 18 on the downstream side, and an acceleration joint 27c connecting the male joint 27a and the female joint 27e. The male joint 27a is fixed to the upstream transport pipe 18 with a screw 41, and a male screw is formed on the outer periphery of the male joint 27a. Female joint 2
7e is locked to a cylindrical body 27b fixed to the downstream transport pipe 18 with a screw 42, and a female screw is formed on the inner periphery of the female joint 27e. A female screw and a male screw are formed on the outer circumference and the outer circumference of both ends of the acceleration joint 27c, respectively, and the male screw formed on the outer circumference of the male joint 27a and the female screw formed on the inner circumference of the female screw cylinder 27e are screwed together. .

A nozzle piece 43 is detachably mounted in the acceleration joint 27c. The nozzle piece 43 is formed in a cylindrical shape as shown in FIGS. 3B and 3C, and a concave portion 43a in which the 0-ring 44 is mounted is formed on the outer periphery near both end surfaces. . A groove 43b is formed on the entire outer periphery of the central portion. Further groove 4
A plurality of outlets 43c for injecting compressed air into the transport pipe 18 are formed to penetrate the transport pipe 18 between the end 3b and both end faces inclining with respect to the axial direction of the transport pipe 18.

The downstream end face of the nozzle piece 43 is
c is fitted and in contact with a step portion 27d formed on the inner periphery of c. The upstream end face of the nozzle piece 43 and the upstream transport pipe 18
The packing 45 is mounted between the end faces. The O-ring 44 and the packing 45 prevent the compressed air and the construction material flowing in the transport pipe 18 from leaking outside.

In the above configuration, a part of the compressed air supplied from the compressor 16 shown in FIG. 4 through the hoses 17 and 17a shown in FIG. 1 pressurizes the inside of the tank 23 and pushes out the construction material to the discharge port 26. This is the same as in the related art, but the compressed air heading toward the discharge port 26 through the hose 17b is given a rotational force by the spiral plate 31 and jets out to the transport pipe 18 together with the material. Further, the air supplied from the hose 17 to the auxiliary pipe 33 through the branch pipe 32 is sent into the groove 43b of the nozzle piece 43 in the acceleration joint 27c via the valve 39 as shown in FIG. The compressed air supplied into the groove 43b is given a rotational force from an ejection port 43c that is inclined with respect to the axial direction, and is ejected to the transport pipe 18.

As described above, the construction material extruded to the discharge port 26 is blown with the compressed air to which the rotational force is given by the spiral plate 31, whereby the mixing with the air is promoted, and the separation of the material is reduced. Can be. Compressed air is also sent from the auxiliary pipe 33, and a rotational force is given by the nozzle piece 43, so that mixing of the material and air is promoted, separation of the material is reduced, and the amount of compressed air is increased. The energy of the air flow can be replenished, and a decrease in speed due to resistance in the pipe can be prevented.

In the present invention, applying the rotational force to the compressed air by the spiral plate 31 or the like and supplying the compressed air at an intermediate portion of the transport pipe 18 are the same as described above even if one is omitted. A predetermined effect can be obtained. Further, when compressed air is supplied in the middle of the transport pipe 18, even when no rotational force is applied to the compressed air as shown in the embodiment, the transport force of the construction material can be improved, and It can transport important construction materials. Further, by increasing the number of compressed air supply points in the joint 27 in accordance with the length of the transport pipe 18, the length of the transport of the construction material can be reduced without lowering the transport force of the construction material, that is, without decreasing the transport speed of the construction material. Transport over distance becomes possible.

[0028]

According to a first aspect of the present invention, there is provided a method of transporting a construction material while blowing compressed air to which rotational force is applied from a rear portion of the transportation pipe to promote mixing of the construction material and air.
Mixing of the air and the construction material is promoted, whereby the separation of the construction material can be prevented, whereby the construction quality can be improved and the transport efficiency can be improved.

A second aspect of the present invention is a method for promoting the transport of the construction material in the transport pipe by blowing compressed air from the middle of the transport pipe into the transport pipe from the outside. The construction material can be transported homogeneously and smoothly regardless of the viscosity of the construction material, the particle size, the variation of the grain, the change of the diameter, the length, and the material of the transport pipe.

According to a third aspect of the present invention, compressed air is blown into the transport pipe from the outside at an angle to the axial direction of the transport pipe, thereby imparting a rotational force to the compressed air to mix the construction material with the air. This is a method of promoting, and in addition to the effect of claim 2, an effect of mixing air and construction material in the middle of the transport pipe is obtained, separation of construction material can be prevented, and the quality of the sprayed surface is improved. be able to.

According to a fourth aspect, as in the first aspect, the construction material is transported while blowing the compressed air to which rotational force is applied from the rear portion of the transportation pipe to promote mixing of the construction material and the air. Since compressed air is blown into the transport pipe from outside in the middle of the transport pipe to promote the transport of construction materials in the transport pipe, the effects of claims 1 and 2 can be simultaneously obtained.

According to a fifth aspect, as in the first aspect, the construction material is transported while blowing the compressed air to which rotational force is applied from the rear portion of the transportation pipe to promote the mixing of the construction material and the air. Since compressed air is blown from the outside into the transport pipe obliquely to the axial direction of the transport pipe, a rotational force is applied to the compressed air to promote mixing of the construction material and air. The effects of the first and third aspects are simultaneously obtained.

According to the sixth aspect of the present invention, the compressed air supply pipe is provided at the rear of the transport pipe so as to communicate with the transport pipe, and the spiral plate for applying a rotational force to the compressed air is provided in the compressed air supply pipe. And an auxiliary pipe for supplying compressed air is provided in the transport pipe, and a joint for blowing compressed air supplied through the auxiliary pipe into the transport pipe is provided in a part of the transport pipe. Since the air outlet is formed obliquely to the axial direction of the tube, the effect of claim 5 can be obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of a connection structure of a pipe for supplying compressed air to a spraying machine that performs a spraying method of the present invention.

FIG. 2A is a side view showing the structure of a conventional transport pipe,
(B) is a side view showing an example of the transport pipe and the auxiliary pipe of the present invention.

3A is a cross-sectional view illustrating a configuration of a connecting portion between a transport pipe and an auxiliary pipe, FIG. 3B is a front view illustrating a configuration of a nozzle piece mounted in a joint of the transport pipe, and FIG. It is a side view of B).

FIG. 4 is an explanatory view showing a schematic configuration of a general construction material spraying plant.

FIG. 5 is a sectional view showing a conventional configuration of the spraying machine of FIG. 4;

[Explanation of symbols]

17: hose, 18: transport pipe, 19: nozzle, 22, 2
3: tank, 26: discharge port, 27: joint, 31: spiral plate, 33: auxiliary pipe, 43: nozzle piece, 43c: jet port

Claims (6)

[Claims] 1. A construction material containing powder and granules is accumulated in a tank in which the construction material is accumulated, and the construction material is extruded from the discharge hole by pressurizing with a compressed air, and the construction material extruded from the discharge hole is compressed air. In a method of blowing construction material onto a construction surface by blowing the construction material onto a construction surface from a nozzle attached to a tip of the transportation pipe, the construction is performed by blowing compressed air imparted with rotational force from the rear of the transportation pipe. A method for spraying construction materials, wherein the construction materials are transported while promoting the mixing of the construction materials and air. 2. The construction material containing powder and granules is pressurized with compressed air in a tank in which the construction material is accumulated, and the construction material is extruded from the discharge hole, and the construction material extruded from the discharge hole is compressed air. In a method for spraying construction material onto a construction surface by blowing the construction material onto a construction surface from a nozzle attached to a tip of the transportation pipe by blowing into the transportation pipe, the method comprises: A method for spraying construction materials, wherein air is blown to promote the transportation of the construction materials in a transport pipe. 3. The construction material and air according to claim 2, wherein compressed air is externally blown into the transport pipe obliquely with respect to the axial direction of the transport pipe to impart rotational force to the compressed air. A method for spraying construction materials, characterized by promoting the mixing of materials. 4. The construction method according to claim 1, wherein compressed air is blown into the transportation pipe from outside at one or more points along the transportation pipe to promote transportation of the construction material in the transportation pipe. How to spray the material. 5. The construction material and air according to claim 4, wherein compressed air is blown into the transport pipe from the outside obliquely with respect to the axial direction of the transport pipe to impart rotational force to the compressed air. A method for spraying construction materials, characterized by promoting the mixing of materials. 6. The construction material containing powder and granules is pressurized with compressed air in a tank in which the construction material is accumulated, and the construction material is extruded from a discharge port, and the construction material extruded from the discharge port is compressed with compressed air. An apparatus for spraying a construction material, which blows a construction material onto a construction surface from a nozzle attached to a tip of the transportation pipe by blowing into a transportation pipe, wherein a compressed air supply pipe provided at a rear part of the transportation pipe in communication with the transportation pipe. A spiral plate for applying a rotational force to the compressed air is inserted into the compressed air supply pipe, an auxiliary pipe for supplying compressed air is provided in the transport pipe, and the auxiliary pipe is provided in a part of the transport pipe. A joint for blowing compressed air supplied through the pipe into the transport pipe, the joint having an air outlet formed obliquely with respect to the axial direction of the transport pipe; Spraying equipment.