JP3193697B2 - Short fibrous material pumping device and method for constructing slopes using short fibrous material pumping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a short fiber or short thread (hereinafter referred to as "short fiber") made of inorganic fibers such as steel fiber, glass fiber, carbon fiber and fiber reinforced plastic mixed with ready mist (mortar and concrete). To a concrete mixer such as a concrete mixer truck or a stirrer, and to a pumping device for pumping short fibrous materials, and a method of constructing a slope using the pumping device.

[0002]

2. Description of the Related Art In order to mix short fibrous materials into ready mist (concrete, mortar), the short fibrous materials are put into concrete or the like which has been stirred in a concrete mixer in advance and stirred. Work needs to be done. Conventionally, as this dosing method or dosing device, a dosing machine 100 having a slope as shown in FIG. 4 is used, and the short fibrous material A is fed into a lower end of a belt conveyor 101 provided diagonally from the lower end of the dosing machine 100. And transported diagonally upward. The belt conveyor 101 is disposed obliquely by a temporary scaffold 102 having a height of 2 to 3 m, and is installed so that the downstream end has a height of about 4 m. The conveyed short fibrous material A was automatically dropped from the downstream end of the belt conveyor 101 into the hopper 71 which is the entrance of the concrete mixer 70, and was introduced into the concrete mixer 70 (prior art 1). .

As another charging method, as shown in FIG. 5, a temporary scaffold 103 having a height of about 4 m is formed, a charging machine 100 having a wide slope is set thereon, and the charging machine 100 is used. Then, the short fibrous material A was dropped into the hopper 71 of the concrete mixer truck 7 having the rear portion approaching the temporary scaffold 103, and was put into the concrete mixer 70. The belt conveyor 101 or a forklift was used to transport the short fibrous material A to a height of about 4 m (Prior Art 2).

[0004]

However, when the belt conveyor 101 or a forklift (not shown) is used as in the prior art 1, there is a possibility that an operator may get caught in the belt conveyor or collide with the forklift. There was a problem that the danger of work was high.

Further, according to the method of introducing short fibrous materials according to the prior art 1 or 2, the short fibrous materials charged into the concrete mixer are installed in the inlet of the mixer of the concrete mixer truck. There is a problem that the stirring blade portion is entangled with the agitating blade portion and tends to form a lump. further,
Although a lot of stirring is performed at the mixer outlet of a concrete mixer truck, if the inside of the mixer is uniformly stirred and the short fibers are mixed with concrete or the like for a long time, the short fibers tend to become entangled and clumped. There has been a problem that it is difficult to mix them evenly.

Further, in a state where the short fibrous materials are not evenly agitated in concrete or the like, a fluid mixed with the short fibrous materials is pumped by a fluid pumping device or the like, and spraying is performed on a slope or the like. When trying to do so, there has been a problem that pulsation often occurs in the pumping device due to the short fibers not being evenly mixed. When performing slope spraying work, etc.
The worker supported by the lifeline has a problem that the risk of work is increased due to the pulsation of the pumping device. Further, when a fluid in which short fibrous materials are not evenly mixed is pumped, there is a problem that the pumping tube is likely to be blocked.

[0007]

In order to solve these problems, a charging device having an inclined surface, a vibrating device for finely and continuously vibrating the charging device, and a pressure feeder disposed downstream of the charging device are provided. Pipe, and a compressor disposed upstream of the pumping pipe, wherein the pumping pipe is connected to the upstream via an air valve.
To the air conditioner, and the downstream pressure pipe on the downstream side
And a discharge port at the downstream end, and
A first jet consisting of a jet tube upstream of the suction port of the hopper
(A) A compression pipe is provided, and a jet pipe is provided downstream of the suction port.
A second air compression pipe is provided, and the short fibrous material fed into the feeding device moves downstream while uniforming the fiber direction by fine vibration from the vibrating device, and is sucked by the force of the compressed air from the compressor. It is sucked from the mouth into the pumping pipe, and the short fibrous material is transported to the downstream side while being dispersed and averaged in the pumping pipe, and is stirred from the discharge port of the pumping pipe in a concrete mixer or a device such as a stirrer. The present invention proposes a short fibrous material pumping device characterized in that it is jetted out and injected with a high pressure into a ready mist.

A charging device having an inclined surface, a vibrating device for finely and continuously vibrating the charging device, a pressure feed pipe disposed downstream of the pressure feed device, and a pressure feed pipe disposed upstream of the pressure feed pipe. The pumping pipe is upstream of the compressor.
Communicates with the air conditioner through the valve, and downstream
If a downstream pressure feed pipe is provided and a discharge port is provided at the downstream end,
The jet pipe is located upstream of the suction port of the hopper of the pumping pipe.
A first air compression pipe made of
A second air compression pipe consisting of a cut pipe is provided, and the short fibrous material charged into the charging device moves downstream while uniforming the fiber direction by fine vibration from the vibration device, and the pressure from the compressor is reduced. It is sucked into the pressure feed pipe from the suction port by the force of the air, and the short fibrous material is conveyed to the downstream side while being dispersed and averaged in the pressure feed pipe, and is discharged from the discharge port of the pressure feed pipe into a concrete mixer or a device such as a stirrer. The fluid containing short fibrous material produced by mixing the short fibrous material with the ready mist by injecting and injecting it into the ready mist that has been agitated at high pressure, and then mixing it with an air compressor, fluid pump,
Pressure including the air-fluid confluence pressure feed pipe where the fluid and the fluid converge
It has a pipe, a fluid outlet, and an air chamber.
Using a fluid pumping device capable of spraying onto a slope, etc., a short fibrous material is pumped while preventing material separation of the fluid and spraying it onto the slope, etc. We propose a construction method such as slope using equipment.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a short fibrous material feeding device according to an embodiment of the present invention, and FIG. 1 is a side view of an input portion and a vibrating portion of the short fibrous material feeding device. FIG. 2 is an explanatory diagram of a slope construction method performed by using a short fibrous material pumping apparatus, which will be described with reference to FIG. 3.

[0010] An apparatus for feeding a short fibrous material according to an embodiment of the present invention includes a charging device 1, a vibration device 2, and a horizontally long hopper 3
, A compressor 4 and a pressure feed pipe 5. An air valve 6 is provided between the compressor 4 and the pressure feed pipe 5.

The charging device 1 is a box-shaped body having a bottom surface, an open top surface, and a periphery surrounded by side walls, and a wide receiving portion 10, an intermediate portion located downstream of the receiving portion 10. A passage portion 11 and a discharge portion 12 formed at the downstream end of the intermediate passage portion and having no side wall are installed at an inclination so that the discharge portion 12 side is lowered. The receiving section 10 is a rectangular shape that is substantially horizontally long in plan view. The intermediate passage portion 11 has a planar shape in which the width gradually decreases toward the downstream side, the rate of narrowing increases on the upstream side, and the side wall has a parabolic shape, and the rate of narrowing toward the discharge section decreases. Become. In an overall plan view of the input device 1, the so-called elephant face / nose shape is the input portion 10 on the forehead side, and the discharge port 12 is on the tip side of the nose.

The receiving portion 10 of the charging device 1 and the intermediate passage portion 1
1, three cylinders 13 are erected at intervals so as to form a substantially equilateral triangle. The height of each cylinder 13 is
The diameter is about 100 to 150 mm and the diameter is about 20 to 30 mm. In other embodiments, a cylinder may be used instead of a cylinder,
The number of standing stands may be increased.

A vibration device 2 composed of a vibrator is provided on the lower surface side of the charging device 1. The vibration device 2 is fixed to the lower surface of the intermediate passage portion 11 of the input device 1 by a spring,
The entire feeding device 1 can be vibrated finely and continuously.

The outlet 12 of the charging device 1 communicates with the horizontally long hopper 3. The suction port 30 of the horizontally long hopper 3 is a horizontally long opening corresponding to the width of the discharge port 12 and communicates with the pressure feed pipe 5.

The pressure feed pipe 5 communicates with the air conditioner 4 via an air valve 6 on the upstream side, a downstream pressure feed pipe 55 on the downstream side, and a discharge port 50 at its downstream end. . A first air compression pipe 51 is provided upstream of the suction port 30 of the horizontally long hopper 3 of the pressure feeding pipe 5, and a second air compression pipe 52 is provided downstream of the suction port 30. First air compression pipe 5
1 is a partial conical tube in which the upstream inlet has a maximum diameter inside a straight cylindrical outer tube 53, and the upstream position is slightly smaller than the merging position with the suction port 30 of the horizontally long hopper 3 and the ejection port has a minimum inner diameter. Consisting of a jet tube. The second air compression pipe 52 is provided inside the right cylindrical outer pipe 54 with the suction port 30 of the horizontally long hopper 3.
The maximum diameter is at the position immediately downstream of the jet pipe, and the jet pipe is a partial conical pipe whose inner diameter becomes narrower toward the downstream side and the downstream end becomes an ejection port having the minimum inner diameter. Second air compression pipe 52
Is around 300 mm. The downstream side of the second air compression pipe 52 is composed of a flexible downstream pressure feed pipe 55 such as a hose, and has a discharge port 50 at the downstream end. The discharge port 50 of the pressure feed pipe 5 is put into a concrete mixer 70 or a stirrer 71 of a concrete mixer truck 7,
The short fibrous material A to be pumped is blown into the mixer 70 or the stirring device 71.

The short fibrous material A used in this embodiment is:
Mortar, a short fibrous material made of a spiral-shaped steel fiber having an expansion coefficient substantially equal to that of a concrete material, having a length of 15 mm to 27 mm and a thickness of 1.0 mm
A flat bar having a width of about 2.5 mm to about 1.5 mm and a width of about 1.0 mm to 1.5 mm is formed into a spiral shape. In another embodiment of the short fibrous material, a short fibrous material or a short thread material having a length of about 10 mm to 30 mm made of an inorganic fiber such as glass fiber, carbon fiber, or fiber reinforced plastic may be used.

Next, the operation of the short fibrous material feeding device according to the embodiment of the present invention will be described. First charging device 1
By operating the vibration device 2 provided at the lower part of the device, fine continuous vibration and vibration are given to the input device 1 via a spring. Next, the short fibrous material A is supplied to the receiving portion 10 of the charging device 1 by an operator. Since the receiving portion 10 is relatively wide, the short fibrous material A can be easily supplied. The short fibrous material A charged into the receiving portion 10 has various directions of fibers or is in a lump, but the charging device 1 is inclined downward from the receiving portion 10 toward the outlet 12. The mass and the continuous fine vibration from the vibrating device 2 gradually loosen the lumps, and the fibers facing each move toward the downstream side toward the downstream side. At this time, the cylinder 13 acts to loosen the lump. As the short fibrous material A gradually decreases in passage width as it passes through the intermediate passage portion 11, the fibers are collected and the fiber direction is substantially the same up and down.

The short fibrous material A is applied to the suction port 3 of the horizontally long hopper 3 by its own weight at the discharge port 12 at the downstream end of the charging device 1.
From 0, it is sucked into the pressure feed pipe 5.

The pressure feed pipe 5 opens the air valve 6, and operates the compressor (air compressor) 4 to insert the pressurized air into the pressure feed pipe 5. The pressurized air is further compressed by the first air compression pipe 51, and the pressure and speed are increased to pass through the vicinity of the suction port 30 of the horizontally long hopper 3, so that the pressure in the pipe is reduced, and the short fibrous material A is removed from the suction port 30.
, And blows the short fibrous material A to the downstream side. The compressed air and the short fibrous material A are further compressed by the jet pipe of the second air compression pipe 52, then opened and dispersed in the pipe at an average rate, and enter the downstream pressure feed pipe 55 at an increased speed. From the discharge part 50, it is jetted out into the ready mist in the concrete mixer 70 or the stirring device 71 on average.

The short fibrous material A, which is spouted out of the ready mist in the concrete mixer 70 or the stirrer 71 at a high pressure, is separated from the ready mist previously stirred in the concrete mixer 70 or the stirrer 71. (Mortar, concrete) Material amount 1
60 kg to 100 kg are mixed per cubic meter. The mixture is further mixed with a mortar and a concrete admixture to produce a ready-mist fluid containing short fibrous substances.

Next, referring to FIG. 3, a construction method of constructing a slope C or the like using a ready-mist fluid mixed with a short fibrous material produced by using the short fibrous material pumping device of the present invention will be described. Will be explained. In this embodiment, the method of constructing the slope C or the like uses a fluid pumping device 8 capable of pumping a short fibrous material-containing ready mist fluid to be used for several hundred meters and spraying the slope.

The ready-mist fluid mixed with the short fibrous materials is mixed from the concrete mixer 70 or the stirring device 71 of the concrete mixer truck 7 through the fluid pressure pump 81 of the fluid pressure device 8 to join the fluid. It enters the feed pipe 820 and is blown to the slope C through the downstream feed pipe 823.

The fluid pumping device 8 includes an air compressor 80, a fluid pump 81, and an air fluid merging pump 8.
And a fluid delivery outlet 83, an air chamber 84, and the like.

The pressure feed pipe 82 is connected to the compressor side air pipe 8.
21, a fluid pump pipe 822, an air fluid confluence pumping pipe 820, and a downstream pumping pipe 823. Pumping pipe 82
Is provided with a fluid outlet 824. The downstream pressure feed pipe 823 is a long-range blowing pipe 823 that is a flexible hose having a length of about 20 to 40 m at the downstream end.
And a long distance scattering tube (not shown) can be detachably changed according to the application. The long-distance scattering tube is a straight tube having a length of about 4 to 7 m.

The compressor-side air pipe 821 has an upstream end connected to the air compressor 80, and a downstream end connected to an upstream end of the air-fluid confluence pressure feed pipe 820. The fluid pump pipe 822 has an upstream end connected to the fluid pump 81 and a downstream end connected to an upstream port of the fluid inlet pipe of the air fluid merging pump 820. Air chamber (pressure tank) in the middle of the fluid pump pipe 822
84 are provided. The air chamber 84 is provided with a lid at the top,
The lid is openable and closable for cleaning and the like. The air chamber 84 is provided with a fluid pressure pump 81 for fluid such as mortar.
The waveform pressure generated from the pressure is changed to a continuous stable pressure, and there is a mixing action.

The air-fluid confluent pressure feed pipe 820 is a multi-branched pipe composed of a straight tubular main air compression pipe and a fluid feed pipe that diagonally joins the main air compression pipe. The main air compression pipe is a straight cylindrical pipe whose outer diameter does not change. The main air compression pipe is connected to the check valve at the upstream inlet and connected to the downstream pressure feed pipe 823 at the downstream outlet. The main air compression pipe has a first jet pipe and a second jet pipe inside.

The short fibrous material A is put into the concrete mixer 70 or the stirrer 71 of the concrete mixer truck 7 from the short fibrous material pumping device, and the raw material short fibrous material such as cement, water and fine aggregate is added. Mix a mortar adhesion enhancer (water reducing agent, flow agent) and the like to create a rich blended, high slump value ready mist fluid. In this example, the rich mist, high slump value lady mist fluid is a high slump value rich composition with a slump value of about 18 cm.

When spraying the ready mist fluid B on the slope C, the air compressor 80 is first operated to supply compressed air to the compressor side air pipe 821 of the pressure feed pipe 82.
To pump. Almost at the same time, the fluid pressure pump 81
By operating, the ready mist fluid B becomes
Concrete mixer 7 for concrete mixer truck 7
0 through the fluid pump tube 822 and
The air is pressure-fed through the compressor-side air pipe 821, and the stiffening agent is pressure-fed by another pipe.

The air from the air compressor 80 passes through the compressor-side air pipe 821, enters the main air compression pipe of the air-fluid confluence and pressure-feeding pipe 820 from the upstream inlet, and enters the large-diameter inlet of the first jet pipe. Here, the air is compressed, increases in pressure and speed, and is jetted from the jet port of the first jet pipe. The ejection port of the first jet pipe is slightly upstream of the confluence of the fluid supply pipe of the air fluid confluence and pressure supply pipe 820, and the ready mist that merges obliquely from the fluid supply pipe in the air traveling direction. The fluid mixes with air from the spout of the first jet tube and subsequently enters the second jet tube. The mixture B of the air and the ready mist fluid is further compressed by the second jet pipe, and then opened and dispersed in the pipe to be jetted to the downstream pressure feed pipe 823, where it is directly discharged to the downstream pressure feed pipe 82.
3 is blown out to the slope C from the fluid outlet 83 supported by the worker P.

The mixture B of the air fluid ejected from the second jet tube is dispersed by compression and opening to form small and stable aggregates.

[0031]

Advantages of the Invention Since the short fibrous materials are spouted into the mixer of the concrete mixer truck evenly, it is possible to mix them evenly and in a short time. 2. Therefore, the quality of the mortar and concrete fluid containing short fibrous materials has been improved, and the production of high quality mortar and concrete fluid has become possible in a very short time as compared with the related art. 3. The workability is improved because extra devices such as a temporary scaffold and a belt conveyor are not required as a device to be put into a concrete mixer or the like as in the related art. In addition, the safety of work has been improved because no accident such as entrapment of short fibrous materials by the belt conveyor occurs. 4. Since high-quality mortar and concrete fluids are used, pulsation does not occur even in long pumping pipes used for construction of slopes and the like, and stable spraying work can be performed, improving work safety. 5. Short fibrous materials are evenly mixed, so long pumping pipes used for construction of slopes, etc. are unlikely to be blocked, safe,
Accurate pumping has become possible. 6. The short fibrous material is evenly mixed with the fluid sprayed on the slope, etc.
Cracks and cracks that occur during concrete shrinkage hardly occur.

[Brief description of the drawings]

FIG. 1 is a partial explanatory view of a short fibrous material feeding device according to an embodiment of the present invention.

FIG. 2 is a side view of an input section and a vibrating section of the same short fibrous material pumping device.

FIG. 3 is an explanatory view of a slope construction method similarly performed by using a short fibrous material pumping device.

FIG. 4 shows a conventional device for feeding short fibrous materials (prior art 1).

FIG. 5 shows a conventional device for feeding short fibrous materials (prior art 2).

[Explanation of symbols]

REFERENCE SIGNS LIST 1 charging device 10 receiving portion 11 intermediate passage portion 12 discharging portion 13 cylinder 2 vibrating device 3 horizontally long hopper 30 suction port 4 compressor (air compressor) 5 pressure feeding pipe 50 discharge port 51 first compression pipe 52 second compression pipe 53 downstream section Pumping tube 6 Air valve 7 Concrete mixer truck 70 Concrete mixer 8 Fluid pumping device 80 Air compressor 81 Fluid pumping pump 82 Pumping tube 820 Air fluid merging pumping tube 821 Compressor side air tube 822 Fluid pumping tube 823 Downstream pumping tube 83 Fluid outlet 84 Air chamber A Short fibrous material B Air fluid mixture (ready mist fluid containing short fibrous material and air mixture) C Slope P Spraying operator

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI B28C 5/40 B28C 5/40 E02D 17/20 104 E02D 17/20 104B E04G 21/02 E04G 21/02 (58) (Int.Cl. ⁷ , DB name) B28C 7/06 B01F 3/12 B01F 5/00 B01F 15/02 B05D 7/00 B28C 5/40 E02D 17/20 104 E04G 21/02

Claims (2)

(57) [Claims] 1. A charging device having an inclined surface, a vibrating device for finely and continuously vibrating the charging device, a pumping pipe arranged downstream of the charging device, and a pumping pipe arranged upstream of the pumping pipe. The pumping pipe has an air
To the air conditioner through the lube,
With a flow section pressure feed pipe and a discharge port at the downstream end
At the upstream of the suction port of the hopper of the pumping pipe.
A first air compression pipe made of
A second air compression pipe made up of a short pipe is provided, and the short fibrous material charged into the charging device moves downstream while uniforming the fiber direction by fine vibration from the vibration device, and pressurized air from the compressor is provided. Is sucked into the pressure-feeding pipe from the suction port by the force, and the short fibrous material is conveyed to the downstream side while being dispersed and averaged in the pressure-feeding pipe. A short fibrous material pumping device characterized in that it is blown out and injected with strong pressure into a stirred ready mist. 2. A charging device having an inclined surface, a vibrating device for finely and continuously vibrating the charging device, a pumping pipe disposed downstream of the charging device, and an upstream side of the pressure feeding pipe. The pumping pipe has an air
To the air conditioner through the lube,
With a flow section pressure feed pipe and a discharge port at the downstream end
At the upstream of the suction port of the hopper of the pumping pipe.
A first air compression pipe made of
A second air compression pipe made up of a short pipe is provided, and the short fibrous material charged into the charging device moves downstream while uniforming the fiber direction by fine vibration from the vibration device, and pressurized air from the compressor is provided. Is sucked into the pressure-feeding pipe from the suction port by the force, and the short fibrous material is conveyed to the downstream side while being dispersed and averaged in the pressure-feeding pipe, and is discharged from the discharge port of the pressure-feeding pipe into a concrete mixer or a device such as a stirring device. The short fibrous material and the fluid containing the short fibrous material produced by injecting into the agitated ready mist with strong pressure and mixing the short fibrous material and the ready mist are mixed together with an air compressor, fluid pressure pump, air
Including air-fluid confluence pumping tube where fluid and fluid merge
Has a pipe, a fluid outlet, and an air chamber.
A short fibrous material pumping device characterized by using a fluid pumping device that can be sprayed on a slope, etc., and performing pressure spraying while spraying the slope, etc., while preventing material separation of the fluid. Construction method such as slope using.