JP2018111268A - Spray system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spray system where cement concrete is pulverized with air so as to be made easy to be carried.SOLUTION: Provided is a spray system 100 comprising: a concrete pump 10; an air compressor 20; a receiver tank 21; an air ring tube 15 containing air inflow tubes 15b, 15c connected to the receiver tank 21 and carrying cement concrete and a dispersion ring 60 with air inflow tubes 61, 62, 63 connected to the receiver tank 21 and dispersing the cement concrete; a taper tube 16; and a jet nozzle 50.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a spraying system capable of dispersing cement concrete containing mortar.

  Conventionally, for example, when spraying is performed by tunnel lining or the like, a spraying machine is made to enter the work site, and cement concrete such as mortar is sprayed by the spraying machine. However, in the case of a slope sprayer or various repair work, there are many cases where the spraying machine cannot enter the work site. In such a case, it is necessary to extend the spray hose so that a worker (so-called “nozzle man”) holds the spray nozzle by hand (so-called “hand-held” work) and performs the spraying work. However, when a large amount of solidified material is sprayed, there has been a problem that an excessive burden is imposed on the worker.

  Moreover, when spray concrete is sprayed on an overhang part or an upper half part of a tunnel, for example, more than half of the sprayed material falls. The dropped material not only significantly deteriorates the working environment, but also increases the cost of removing it, and this increases the overall cost of the spraying work.

  Therefore, for example, Patent Document 1 discloses that when a worker performs a spraying work while supporting a solidifying material spraying device, the solidified material sprayed without overloading the worker. Has disclosed a solidifying material injection system that can reduce the amount of water falling and does not deteriorate the environment of the work site of the sprayer.

Japanese Patent No. 5697264

  However, in the solidified material injection system of Patent Document 1 described above, particularly when cement concrete having a small slump is transported and sprayed, it is difficult to transport even if it receives high-pressure air (compressed air) for transport in the air ring pipe. There was a problem.

  Therefore, an object of the present invention is to provide a spraying system that makes it easy to convey cement concrete by air.

  To achieve the above object, the spraying system of the present invention comprises a concrete pump for conveying cement concrete; an air compressor; a receiver tank connected to the air compressor; and an air ring pipe connected to the concrete pump. A dispersion air inflow pipe connected to the receiver tank for conveying the cement concrete and a dispersion air inflow pipe connected to the receiver tank for dispersing the cement concrete. An air ring pipe having a ring; a taper pipe disposed on the downstream side of the air ring pipe; and an injection nozzle disposed on the downstream side of the taper pipe.

  Here, “cement concrete” in the present invention is a general term for paste, mortar, and concrete.

  As described above, the spraying system of the present invention includes a conveying air inflow pipe connected to the receiver tank for conveying cement concrete, and a dispersing air inflow connected to the receiver tank for dispersing cement concrete. And an air ring tube having a dispersion ring having a tube. Because of such a configuration, even if the slump is small and hard cement concrete, it can be easily conveyed by being pulverized with air.

It is explanatory drawing explaining the whole structure of a spraying system. It is a perspective view of an air ring pipe. It is a perspective view of a dispersion ring. It is the schematic diagram which drew the dispersion ring simplified. It is an action figure for demonstrating the effect | action of a dispersion | distribution ring. It is a perspective view of the dispersion ring of another form.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the components described in the following embodiments are exemplifications, and are not intended to limit the technical scope of the present invention only to them.

  The spray system 100 of the present invention described below includes, for example, a simple method frame (countermeasure for collapse slope), mortar spray (repair of railway cut slope), spray method frame (filling reinforcement), and lining thickening (tunnel). Used for etc. And since the design standard strength can be increased, it is of high quality, high quality material (mortar) is stably pumped and sprayed, so it has excellent durability, and the use of raw mortar simplifies plant equipment. In addition, since there is no air bleeding sound peculiar to spraying in the conventional construction method, there is a feature that noise is low and long-distance pumping is possible.

(Overall configuration of spraying system)
As shown in FIG. 1, the spray system 100 of the present embodiment includes a concrete pump 10, an air compressor 20, a receiver tank 21, a quick hardener supply pump 30, a quick setting agent supply pump 40, and an injection nozzle 50. And. In addition, although the spraying system 100 of the present embodiment has been described with respect to the case where the quick setting agent supply system including the quick setting agent supply pump 40 is provided, the present invention is not limited to this, and there is no quick setting agent supply system. May be. Furthermore, although the spraying system 100 of the present embodiment has been described with respect to the case where the rapid hardening agent supply system including the rapid hardening agent supply pump 30 is provided, the present invention is not limited to this, and cement concrete with a small slump is used. In this case, there is no need for a supply system for the rapid hardening agent.

  Between the concrete pump 10 and the injection nozzle 50, from the concrete pump 10 side toward the injection nozzle 50, a high pressure resistant hose (not shown), a concrete shutter (not shown), a concrete pipe 13, and a wear resistant high pressure hose (not shown). The air ring tube 15 (including the dispersion ring 60), the rapid hardening agent mixing ring 32, the taper tube 16, and the spray hose 17 are connected.

  As shown in FIG. 2, the air ring pipe 15 includes a concrete inflow port 15a, two air inflow pipes 15b and 15c as transfer air inflow pipes, a discharge port 15d, and dispersion air inflow pipes 61 and 62. , 63 and a dispersion ring 60. In the air ring pipe 15, the cement concrete supplied from the concrete pump 10 and the high-pressure air supplied from the air compressor 20 are mixed, so that the cement concrete is entrained in the high-pressure air and reaches the injection nozzle 50. And it is made to be injected.

  The concrete inflow port 15a is arranged at the center of three pipe lines, and cement concrete flows in the inside thereof.

  The air inflow pipes 15b and 15c are arranged so as to sandwich the concrete inflow port 15a, and air (compressed air) flows through the inside. The cement concrete supplied through the concrete inflow port 15a is entrained by the air supplied from the air inflow pipes 15b and 15c.

  As shown in FIG. 3, the dispersion ring 60 is formed in a cylindrical shape as a whole, and has three dispersion air inflow pipes 61, 62, 63 at the same position when viewed in the direction of flow of cement concrete. have. These dispersion air inflow pipes 61, 62, 63 are connected to the receiver tank 21 and supplied with high-pressure air.

  Each of the dispersion air inflow pipes 61 (62, 63) protrudes from the cylindrical main body 600 of the dispersion ring 60 at a substantially right angle. Note that the angle of the dispersion air inflow pipe 61 (62, 63) is not limited to a substantially right angle, and can be installed so as to be inclined with respect to the main body 600. As shown in FIG. 4, the main body 600 has two holes (about φ2 mm) for ejecting high-pressure air on the connection surface of the dispersion air inflow pipe 61 (62, 63). The two holes are drilled to ensure the supply of high pressure air. That is, if two holes are drilled, even if one hole is closed, high-pressure air is supplied to the cement concrete via the other hole.

  The dispersion air inflow pipes 61, 62, 63 are arranged substantially evenly in the circumferential angle direction. That is, the dispersion air inflow pipes 61, 62, 63 are arranged at positions separated from each other by 120 degrees in circumferential angle.

  Furthermore, as another type of dispersion ring 60, as shown in FIG. 6, three dispersion air inflow pipes 61, 62, 63 are spirally formed along the direction in which cement concrete flows. That is, three dispersion air inflow pipes 61, 62, 63 are arranged spirally along the cylindrical surface of the cylindrical dispersion ring 60. These dispersion air inflow pipes 61, 62, 63 are connected to the receiver tank 21 and supplied with high-pressure air.

  In this case, the dispersion air inflow pipes 61, 62, and 63 are disposed at positions separated from each other by 120 degrees in the circumferential direction when viewed in the circumferential direction. The first dispersion air inflow pipe 61 projects from the lower part (bottom) of the main body 600 (in use), and the second dispersion air inflow pipe 62 is in the main body (in use). The third dispersion air inflow pipe 63 projects from the upper right part, and projects from the upper left part of the main body (in use).

  The rapid hardening agent mixing ring 32 is disposed between the air ring tube 15 and the taper tube 16. The rapid hardening agent mixing ring 32 is provided to join the rapid hardening agent (slump killing agent) with the cement concrete and to mix the rapid hardening agent into the cement concrete uniformly.

  The receiver tank 21 is storage means for storing compressed air (air) generated by the air compressor 20. The receiver tank 21 is provided with an air inlet and four air outlets. The air compressor 20 and the air inlet of the receiver tank 21 are connected by an air hose. The air discharge port of the receiver tank 21, the air inflow pipes 15 b and 15 c of the air ring pipe 15, and the dispersion air inflow pipes 61, 62 and 63 of the dispersion ring 60 are connected by air hoses, respectively.

  Furthermore, the air discharge port of the receiver tank 21 and the air inflow pipe 32a in the rapid hardening agent mixing ring 32 are connected by an air hose. In addition, the rapid hardening agent supply pump 30 and the rapid hardening agent inflow port in the quick hardening agent mixing ring 32 are connected by a rapid hardening agent supply hose. Therefore, the rapid hardening agent is entrained in the high pressure air and supplied to the rapid hardening agent mixing ring 32 while being mixed with the high pressure air.

  Although not shown, the rapid hardening agent mixing ring 32 has two holes (φ2 mm) for ejecting a mixture of the rapid hardening agent and air to the cement concrete. The two holes are drilled to ensure the supply of the hardener. That is, if the two holes are perforated, even if one of the holes is blocked, the rapid hardening agent is supplied to the cement concrete flowing in the rapid hardening agent mixing ring 32 via the other hole.

  A rapid hardener mixing ring 32 is connected to the downstream side of the air ring pipe 15, and a tapered pipe 16 (large diameter side thereof) is connected to the downstream side of the rapid hardener mixing ring 32. The reason for this order is that if the taper tube 16 is connected to the air ring tube 15 and the quick hardener mixing ring 32 is connected to the (small diameter side) of the taper tube 16, the high-pressure air inside the taper tube 16 is cemented. This is because it flows to surround the concrete. In this state, the rapid hardening agent and cement concrete are not mixed well. Therefore, the arrangement of the rapid hardening agent mixing ring 32 is determined so that the rapid hardening agent and cement concrete are mixed on the upstream side of the taper pipe 16.

  A blowing hose 17 is connected to the discharge port (small diameter side: right side in FIG. 1) of the tapered tube 16. A cement concrete injection port of the injection nozzle 50 is connected to the tip of the spray hose 17. In addition, although the injection nozzle 50 is shown so that the cement concrete injection port and the quick setting agent injection port may be configured integrally, the quick setting agent injection port is configured separately from the injection nozzle 50. .

  In the vicinity of the injection nozzle 50, a flexible quick setting agent injection hose 43 is arranged along the injection nozzle 50. The quick setting agent injection hose 43 is bound in the vicinity of the injection nozzle 50 by a binding tool (for example, a wire or vinyl tape). The end of the quick setting agent injection hose 43 opposite to the injection side is connected to the discharge side of the merging pipe, and the accelerating agent supply system and the high pressure air supply system are joined to the merging pipe. .

  When spraying, cement concrete is injected from the injection nozzle 50, and at the same time, the quick setting agent supplied via the quick setting agent supply hose and the quick setting agent inflow portion passes the air hose and the high pressure air inflow portion. The high-pressure air is supplied through the quick-setting agent injection hose 43.

  Then, the jet of the rapid setting agent joins and mixes with the jet of cement concrete from the injection nozzle 50 and is injected into the construction area (for example, the slope). As mentioned above, since the rapid hardening agent is mixed in cement concrete, the rapid hardening agent and quick setting agent are mixed in cement concrete by joining with the jet of rapid setting agent, so it does not flow instantaneously. Turn into.

(Function)
Next, the effect | action of the spraying system 100 provided with the dispersion | distribution ring 60 of a present Example is demonstrated using FIG.4 and FIG.5. As shown in FIGS. 4 and 5, high-pressure air is injected toward the cement concrete through two holes (φ2 mm, two are formed along the flowing direction). Then, as shown in FIG. 5, the cement concrete flowing inside the dispersion ring 60 is finely dispersed by the high-pressure air. In the example shown in FIG. 5, cement concrete is finely dispersed by three high-pressure air jets.

  After that, the cement concrete dispersed in three is entrained downstream in the direction of the ejection nozzle 50 upon receiving ejection of the high-pressure air for conveyance from the conveyance air inflow pipes 15b and 15c. At this time, since cement concrete is dispersed in advance, it is easier to ride high-pressure air than when cement concrete is not dispersed. Further, when the hardener is sprayed in the quickener mixing ring 32 disposed later, the quickener is evenly dispersed in the cement concrete.

(effect)
Next, effects produced by the spraying system 100 of the present embodiment will be listed and described.

(1) As described above, the spraying system 100 of the present embodiment includes the concrete pump 10 for conveying cement concrete; the air compressor 20; the receiver tank 21 connected to the air compressor 20; and the concrete pump 10. The air ring pipe 15 is connected to the receiver tank 21 and is connected to the receiver tank 21 for transporting the cement concrete, and is connected to the receiver tank 21 for dispersing the cement concrete. An air ring tube 15 having a dispersion ring 60 having dispersion air inflow tubes 61, 62, 63; a taper tube 16 disposed downstream of the air ring tube 15; disposed downstream of the taper tube 16 An injection nozzle 50 to be operated.

  Since it is such a structure, in the spraying system 100 of a present Example, even if it is a cement concrete with a small slump, it is air by providing the dispersion | distribution ring 60 which has the air inflow pipes 61, 62, and 63 for dispersion | distribution. It can be easily crushed and conveyed.

(2) Further, the dispersion air inflow pipes 61 to 63 are disposed upstream of the transport air inflow pipes 15b and 15c in the direction in which the cement concrete flows, so that they are transported by air after being dispersed. Therefore, the conveyance efficiency is further increased.

(3) Further, the conveying air inflow pipes 15b and 15c are oriented so as to urge the cement concrete along the direction in which the cement concrete flows, and the dispersing air inflow pipes 61 to 63 are made of cement concrete. It is oriented so as to be substantially orthogonal to the flowing direction. With such a configuration, high-pressure air can be injected substantially orthogonal to the direction in which the cement concrete flows, so that the cement concrete can be efficiently dispersed (pulverized).

(4) The dispersion ring 60 includes a plurality of dispersion air inflow pipes 61 to 63, and the plurality of dispersion air inflow pipes 61 to 63 are at the same position as viewed in the direction in which the cement concrete flows ( Arranged in a ring). With such a configuration, by forming a wall-shaped air curtain in front of the flowing cement concrete, it is possible to inject high-pressure air substantially uniformly without leakage to the cement concrete. Furthermore, when the rapid hardening agent mixing ring 32 is provided, after the cement concrete is dispersed, the rapid hardening agent can be mixed as a whole by jetting the rapid hardening agent in the downstream hardening agent mixing ring 32.

(5) Furthermore, the dispersion ring 60 includes a plurality of dispersion air inflow pipes 61 to 63, and the plurality of dispersion air inflow pipes 61 to 63 are arranged in a spiral shape along the direction in which the cement concrete flows. It is also preferable. With such a configuration, high-pressure air can be jetted evenly and evenly over the whole without blocking the flow of cement concrete. Furthermore, when the rapid hardening agent mixing ring 32 is provided, after the cement concrete is dispersed, the rapid hardening agent can be injected as a whole by injection of the rapid hardening agent in the downstream hardening agent mixing ring 32.

(6) And, the spray system 100 includes a rapid hardening agent supply pump 30 for conveying the rapid hardening agent; and a rapid hardening agent mixing ring 32 connected to the rapid hardening agent supply pump 30. And a quenching agent mixing ring 32 that is disposed on the downstream side of the air ring tube 15 and has a quenching agent inflow pipe 32a for injecting the quenching agent into cement concrete. Is also preferable. If it is such a structure, the water | moisture content contained in cement concrete will aggregate by adding a rapid hardening agent to cement concrete, and the jet power which acts on the injection nozzle 50 will reduce. Therefore, the burden on the operator is reduced. In addition, the agglomeration of water reduces the amount of dust generated, ensuring the operator's field of view and improving the work environment. In particular, by disposing the dispersion ring 60 on the upstream side of the rapid hardening agent mixing ring 32, the rapid hardening agent can be dispersed substantially uniformly in the cement concrete.

(7) The spray system 100 includes a quick setting agent pump 40 for transporting the quick setting agent; and a quick setting agent injection hose 43 connected to the quick setting agent pump 40, and is attached in the vicinity of the injection nozzle 50. It is also preferable to further include a quick setting agent injection hose 43. In this way, if the quick setting agent is used at the same time, the sprayed cement concrete instantaneously becomes non-fluidized or solidifies, so that it is difficult for the material to fall from the sprayed surface. Furthermore, when the quick hardening agent and the quick setting agent are added to the cement concrete for spraying, the use amount of the whole medicine is reduced as compared with the case where only the quick setting agent is added.

  The embodiment of the present invention has been described in detail with reference to the drawings, but the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to the present invention. included.

  For example, although not specifically described in the embodiments, polypropylene fibers or the like can be mixed into the cement concrete.

  In the embodiment, the case where the dispersion ring 60 has three dispersion air inflow pipes 61, 62, and 63 has been described. However, the present invention is not limited to this, and the dispersion ring 60 has one or two dispersion air inlets. You may have an air inflow tube, and may have four or more dispersion | distribution air inflow tubes.

  In addition, in an Example, as an example of arrangement | positioning of the dispersion | distribution air inflow pipes 61, 62, 63 in the dispersion | distribution ring 60, the example of the same position (annular arrangement | positioning) seeing in the flow direction, However, the present invention is not limited to these, and other arrangements may be used. For example, a plurality of dispersing air inflow pipes can be arranged linearly in the flow direction, or can be arranged in a staggered manner.

DESCRIPTION OF SYMBOLS 100 Spraying system 10 Concrete pump 15 Air ring pipes 15b and 15c Conveying air inflow pipe 16 Taper pipe 17 Blowing hose 20 Air compressor 21 Receiver tank 30 Quick hardener supply pump 32 Quick hardener mixing ring 32a Quick hardener inflow pipe 40 Binder supply pump 43 Quick binder injection hose 50 Injection nozzle 60 Dispersion rings 61, 62, 63 Dispersion air inflow pipe

Claims (7)

A concrete pump for conveying cement concrete;
An air compressor;
A receiver tank connected to the air compressor;
An air ring pipe connected to the concrete pump, connected to the receiver tank, for conveying the cement concrete, and for conveying the cement concrete, and connected to the receiver tank for dispersing the cement concrete A dispersion ring having a dispersion air inflow tube for carrying out an air ring tube;
A tapered tube disposed downstream of the air ring tube;
An injection nozzle disposed downstream of the tapered tube;
A spraying system.   2. The spraying system according to claim 1, wherein the dispersion air inflow pipe is disposed upstream of the transfer air inflow pipe as viewed in a direction in which the cement concrete flows.   The conveying air inflow pipe is oriented to urge the cement concrete along the direction of flow of the cement concrete, and the dispersing air inflow pipe is substantially orthogonal to the direction of flow of the cement concrete. The spraying system according to claim 1 or 2, wherein the spraying system is oriented as follows.   The dispersion ring has a plurality of the dispersion air inflow pipes, and the plurality of the dispersion air inflow pipes are arranged so as to be at the same position in the flow direction of the cement concrete. The spraying system as described in any one of Claims 3.   The said dispersion | distribution ring has several said air inflow pipes for dispersion | distribution, The said some air inflow pipes for dispersion | distribution are helically arrange | positioned along the flow direction of the said cement concrete. 5. The spraying system described in any one of 4. A hardener supply pump for transporting the hardener;
A quenching agent mixing ring connected to the quenching agent supply pump, comprising a quenching agent inflow pipe connected to the quenching agent supply pump and for injecting the quenching agent onto the cement concrete. A hardener mixing ring disposed downstream of the air ring tube;
The spraying system according to any one of claims 1 to 5, further comprising: A quick-setting pump that transports the quick-setting agent;
A quick setting agent injection hose connected to the quick setting agent pump, the quick setting agent injection hose attached in the vicinity of the injection nozzle;
The spraying system according to any one of claims 1 to 6, further comprising: