KR20090086378A - A quickly hardening agent mixture machine for shotcrete - Google Patents

A quickly hardening agent mixture machine for shotcrete Download PDF

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Publication number
KR20090086378A
KR20090086378A KR1020090064573A KR20090064573A KR20090086378A KR 20090086378 A KR20090086378 A KR 20090086378A KR 1020090064573 A KR1020090064573 A KR 1020090064573A KR 20090064573 A KR20090064573 A KR 20090064573A KR 20090086378 A KR20090086378 A KR 20090086378A
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KR
South Korea
Prior art keywords
compressed air
powdery
shotcrete
mixing
fastener
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Application number
KR1020090064573A
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Korean (ko)
Inventor
최찬희
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최찬희
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Priority to KR1020090064573A priority Critical patent/KR20090086378A/en
Publication of KR20090086378A publication Critical patent/KR20090086378A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/04—Supplying or proportioning the ingredients
    • B28C7/0481—Plant for proportioning, supplying or batching
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
    • E01C19/12—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for distributing granular or liquid materials
    • E01C19/20—Apparatus for distributing, e.g. spreading, granular or pulverulent materials, e.g. sand, gravel, salt, dry binders
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D15/00—Handling building or like materials for hydraulic engineering or foundations
    • E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
    • E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/001—Improving soil or rock, e.g. by freezing; Injections

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Architecture (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Nozzles (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)

Abstract

A dry rapid-hardening mixing apparatus of shotcrete placing equipment is provided to supply a proper amount of rapid-hardening agent by controlling the inlet amount of powered rapid-hardening agent according to the discharge pressure of concrete milk. A dry rapid-hardening mixing apparatus of shotcrete placing equipment comprises a storage unit(10), an accelerating agent feeding unit(20), a mixing unit(30), and a compressed air generator(40). The storage unit stably ejects powdered accelerating agent while maintaining a predetermined pressure. The accelerating agent feeding unit is installed beneath the storage unit and regulates the feed rate of the accelerating agent. The mixing unit supplies and mixes the powdered accelerating agent and compressed air to the rear side of a shotcrete feeder(50) and an injection nozzle(60). The storage unit comprises a closed storage tank(12) with a hatch(11). The internal pressure of the storage tank is maintained at constant pressure through a compressed air supply pipe(13). A fixed amount of powdered accelerating agent is continuously ejected to a bottom outlet(14).

Description

Dry feed agent mixing device for shotcrete pouring equipment {A quickly hardening agent mixture machine for shotcrete}

The present invention relates to a powdery dry feeder mixing device of shotcrete pouring equipment, and in particular, the present invention by mixing and spraying the high pressure air and powdered dry feeder immediately after the shotcrete spraying nozzle to stably perform the shotcrete work, tunnel or The present invention relates to a powder-based dry feeder mixing device of shotcrete placing equipment for rapidly curing and curing the surface of a surface and performing tunnel or surface construction stably.

In general, in civil engineering works for roads, railways, etc., they are used as means for securing roads through tunnels or cuts as a means for securing roads.

In this construction method, it is well known that shotcrete is applied to stabilize the ground by applying shotcrete to the slump surface of the tunnel or the surface due to construction conditions or problems in construction.

 However, in this construction method, due to the problems of air and various construction problems, the shotcrete work is simply completed and the next process is required. Will have.

For this reason, after curing concrete in the process of shotcrete work, in order to perform the next process, the concrete sprayed on the slope or slope surface of the tunnel or the surface is cured (cured) in a short time by putting a fastener during the shotcrete work. It is well known that a payment is used to perform the payment.

Therefore, in the shotcrete method used for placing concrete in tunnels or surfaces where formwork cannot be used in construction or economic aspects, a lot of fasteners are used to rapidly cure (cure) the sprayed concrete. In this concrete quenching method, a charging method of a quenching material formed in a liquid phase and a pulverizing material in a liquid form is known.

However, in the method of constructing the quickener using liquid phase, it is easy and convenient to handle, handle and install the quickener, while the strength of concrete decreases after construction and the high fluidity of concrete leads to problems in strength after construction, which is a significant disadvantage in construction. In the case of the use of powdery fasteners, the powdery fasteners are weak in water and have a disadvantage in that the curing speed is increased when they are mixed with water, and in the case of wet shotcrete construction, it requires a considerable skill to be applied. It is.

Accordingly, the present invention is to provide a shotcrete pouring equipment for imparting stability and certainty to the slump construction of tunnels or surfaces by spraying and mixing powdered quickeners in the horizontal direction with respect to the moving direction of the concrete milk in the direction immediately before the injection nozzle. The purpose is to provide a dry feed mixing device.

In addition, the present invention is sprayed and mixed in the horizontal direction with respect to the advancing direction of the concrete milk in the direction immediately before the injection nozzle in the shotcrete construction, while supplying the compressed air at the same time, the stability and reliability of the slump construction of the tunnel or surface Another purpose is to provide a dry feed mixing device for shotcrete pouring equipment.

In addition, the present invention controls the input amount of the powdery fastener in accordance with the delivery pressure of the concrete milk to dry powder grade of shotcrete equipment that can supply an appropriate amount of the powdery fastener in accordance with the delivery amount of the concrete milk pulsating (intermittent) Another object is to provide a payment mixing device.

The present invention for achieving this object is a storage means for storing and delivering the powdery fastener at a predetermined pressure; A fastener quantitative dispensing means which is installed below the storage means and adjusts an amount of dispensing of the powdery quickener; Mixing means for supplying and mixing the powdered quickener and compressed air immediately after the injection nozzle of the shotcrete discharging means; It characterized in that it comprises a compressed air generating means for adjusting the pressure of the compressed air, which will be described in more detail according to the accompanying drawings as follows.

Figure 1 is an overall schematic view of the installation state of the present invention, Figure 2 is a cross-sectional view showing a combined state of the storage means and the fastener quantitative delivery means of the present invention, Figure 3 is a cross-sectional view taken along line BB of Figure 2, ), (B) is an illustration of each embodiment of the mixing means of the present invention.

As shown, the present invention includes a storage means for maintaining a predetermined pressure to stably discharge the stored powdery fastener; A fastener quantitative dispensing means (20) installed below the storage means (10) to adjust a dispensing amount of the powdery fastener; Mixing means (30) for supplying and mixing powdered quickener and compressed air immediately after the injection nozzle (60) of the shotcrete discharging means (50); It characterized in that it comprises a compressed air generating means 40 for adjusting the pressure of the compressed air.

The storage means (10) is a sealed storage tank (12) having a hatch (11) formed therein to maintain a constant internal pressure at all times through the compressed air supply pipe (13) to a predetermined amount of powder feed material to the lower outlet (14) (G) is continuously discharged in a stable state, and the powdery quick delivery material quantitative dispensing means (20) having a supply (21) is provided below the discharge port (14) of the storage means (10).

The powdery fasteners quantitatively discharging means 20 is a powdery fasteners quantitatively discharging means 20 in which the supply pin 21 having evenly disposed the plurality of blade pieces 22 is orthogonal to the falling direction of the powdery fasteners G. The inner wall of the space is formed in a form that is divided into a predetermined amount of powder feed material (G) is injected into the input space (S) between the blade pieces 22, supply 휀 (21) is a pneumatic, which can adjust the speed, The rotational speed is controlled by a drive means 23 such as a drive motor such as an electric drive or air, thereby adjusting the rotational speed of the blade piece 22, and the feeding amount and the feeding amount of the powdered fastener G injected between the blade pieces 22. To the lower portion of the powdery fastener quantitatively discharging means 20, the compressed air inlet pipe 24 is squeezed out, and an input space S between the blade pieces 22 positioned on the compressed air inlet pipe 24 side of the lower portion S. Pressurized air to the delivery pipe (25). It will be adjusted to the supply amount of powder grade payment (G).

The shotcrete delivery means 50 is the same as the existing means for pulsating the concrete milk by a two-cycle pump, and the spraying direction of the "a" type injection nozzle 60 of the shotcrete delivery means 50 in the horizontal direction. Mixing means 30 inside the “a” type injection nozzle 60 by supplying the powdery quickener G and the compressed air A through the powdery quickener delivery pipe 25 and the compressed air supply pipe 41, respectively. ) To be strongly sprayed through the injection hole 61 by the compressed air (A) while mixing the concrete milk (C) and the powdery fastener (G) in a short time.

As described above, in the present invention, immediately before the injection of the "a" type injection nozzle 60, the compressed air A and the powdery fastener G are simultaneously supplied in the flow direction and the horizontal direction of the concrete milk C and mixed. This is to be immediately sprayed through the injection hole 61 of the "a" -type injection nozzle 60 by minimizing the contact time with moisture contained in the wet concrete milk (C) spray nozzle (60) 3) The powdery fastener (G) and the concrete milk (C) are sufficiently mixed by the compressed air (A) by excluding the phenomenon of being hardened inside and adsorbed and solidified on the inner circumferential surface of the injection nozzle 60 and the injection hole 61. Immediately to be sprayed to be able to smoothly spray the powdery fastener (G) and concrete milk (C).

In addition, in the present invention, the powdered fastener G and the compressed air A are mixed and supplied to the mixing means 30 in the mixing means 30 immediately after the “a” type injection nozzle 60. As shown in (a), each of them may be separately supplied in the horizontal direction with respect to the flow direction of the concrete milk C, and may be mixed and sprayed. As shown in (b) of FIG. And the powdery fastener (G) and the compressed air (A) are first mixed through the mixing valve (31) in the supply pipe (41) of the compressed air (A), and then the mixing means (30) through the transfer pipe (32). It may be to be injected through the injection hole 61 of the "a" type injection nozzle 60 while mixing again with the concrete milk (C).

Said mixing side 31 is a plurality of compressed air inlet holes 43 perforated at an acute angle with respect to the advancing direction of the powdery quickener G in the outer periphery of the powdery quickener G supply pipe 21, And spray the powdery fastener (G) in the form of cyclone and mix it with the concrete milk (C) more powerfully to enhance the adsorptive power of the concrete milk (C) to stabilize and perfect the construction on the tunnel wall or rock wall. Make it work.

In addition, the compressed air generating means 40 is for supplying the compressed air to the storage means 10, the quick feed material delivery means 20 and the mixing means 30, and adjusts the pressure through the pressure control valve 42 In addition, a constant pressure control valve 15 is installed on the compressed air supply pipe 13 side of the storage means 10 to maintain a constant pressure at all times in the storage means 10 to supply a predetermined amount of powdery quickener G. It is to be supplied to the payment amount sending means 20.

In the present invention of the member, such as the shotcrete delivery means 50 and the compressed air generating means 40 is operated, the interior of the storage means 10 is always constant by the constant pressure control valve 15 and the compressed air supply pipe 13. The compressed air (A) of the pressure is supplied to maintain a constant pressure therein, and in this constant pressure state is dropped through the outlet 14 at a uniform speed to be sent out to the feed agent fixed quantity sending means 20, where The settlement quantity sending means 20 is separated into a plurality of input spaces S by the blade pieces 22, and the powdery quick charging material G introduced into the input space S located at the lower portion is introduced into the compressed air. By the compressed air (A) supplied to the pipe (24) is to send the powdery fastener (G) present in the input space (S) of the lower position, the rotation speed of the supply (21) of the drive means 23 To adjust the rotational speed of the feed pin 21 The feed rate of the feed material (G) is adjusted to be supplied to the mixing means 30 immediately after the "a" type injection nozzle 60 through the delivery pipe 25, and at the same time, the compressed air A is also supplied to the compressed air supply pipe 41. By supplying to the mixing means 30 immediately after the "a" type injection nozzle 60 through the concrete milk (C) and the powdered fastener (G) and compressed air (A) while mixing of the injection nozzle (60) It is injected into the injection hole 61, where the powdery fastener (G) and compressed air (A) is injected and mixed immediately after the "a" type injection nozzle 60, the flow of the concrete milk (C) in general In the horizontal direction with respect to the spraying direction, the mixing position is mixed and sprayed in a short section of less than 1m, so that the contact time of the powdery quickener (G) with the moisture mixed in the concrete milk (C) Very short, powdery quickener (G) is adsorbed solidified on the inner wall of the "a" type injection nozzle 60 or clogged the injection hole (61) With the exception of the phenomenon, shotcrete construction is performed on the tunnel wall and rock wall smoothly and stably.

In the present invention, the powdery fastener is hardened and solidified inside the spray nozzle by a relatively simple device that sprays and mixes the powdered fastener made of powder during shotcrete in the horizontal direction with respect to the advancing direction of the concrete milk in the direction immediately before the spray nozzle. It is possible to impart the stability and certainty of the slump construction of the tunnel or the surface by eliminating the phenomenon. It is possible to give stability and certainty to the slumping of tunnel or surface by spraying and mixing, but supplying with compressed air at the same time.In addition, the present invention controls the input amount of powdered fastener according to the discharge pressure of concrete milk to control pulsation ( Depending on the amount of concrete milk to be sent out intermittently) It has various features such as expecting perfection of construction by adjusting.

1 is an overall schematic view of the installation state of the present invention,

2 is a cross-sectional view showing a combined state of the storage means and the fastener quantitative sending means of the present invention,

3 is a cross-sectional view taken along the line B-B of FIG.

Figure 4 (a), (b) is an illustration of each embodiment of the mixing means of the present invention.

* Explanation of symbols for the main parts of the drawings

10: storage means 11: hatch 12: storage tank 13: compressed air supply pipe

14: outlet 15: static pressure control valve 20: powder feed material delivery means

21: Supply 휀 22: Flight

23: drive means 24: compressed air inlet pipe 25: delivery pipe

30: mixing means 31: mixing side 32: transfer pipe

40: compressed air generating means 41: compressed air supply pipe 42: pressure control valve

43: compressed air inlet hole

50: shotcrete delivery means

60: "a" type injection nozzle 61: sprayer

S: Input space

Claims (5)

In the apparatus for mixing the powdery fastener of the shotcrete equipment, A storage means 10 for stably discharging the stored powdery rapid charging material while maintaining a predetermined pressure; A fastener quantitative dispensing means (20) installed below the storage means (10) to adjust a dispensing amount of the powdery fastener; Mixing means (30) for supplying and mixing powdered quickener and compressed air immediately after the injection nozzle (60) of the shotcrete discharging means (50); Drying powder mixing device of the shot concrete pouring equipment characterized in that it comprises a compressed air generating means 40 for adjusting the pressure of the compressed air. The method of claim 1, The storage means 10 is a sealed storage tank 12 in which a hatch 11 is formed, and the inside thereof maintains a constant internal pressure at all times through the compressed air supply pipe 13 so that a predetermined amount of powdery fastener (G) is provided to the lower outlet 14. Dry powder mixing device of the shot concrete pouring equipment characterized in that the) to be continuously discharged in a stable state. The method of claim 1, The powdery fasteners quantitatively discharging means 20 is a powdery fasteners quantitatively discharging means 20 in which the supply pin 21 having evenly disposed the plurality of blade pieces 22 is orthogonal to the falling direction of the powdery fasteners G. It is formed in the form of hermetically partitioning the inner wall space of the powder is composed of a predetermined amount of powder fastener (G) is introduced into the input space (S) between the blade pieces 22, the powder fastener ( Dry powder mixing device for shotcrete of shotcrete pouring equipment characterized by controlling the input amount and the feed amount of G). The method of claim 1, A powdery fastener delivery pipe 25 and a compressed air supply pipe 41 are formed in the immediate direction of the "a" type injection nozzle 60 of the shotcrete delivery means 50 in the spraying direction and the horizontal direction of the concrete milk. Supplying the quickener (G) and the compressed air (A), respectively, while mixing the concrete milk (C) and powdery quickener (G) in a short time in the mixing means 30 inside the "a" type injection nozzle (60) Dry powder mixing device of the shot concrete pouring equipment characterized in that the injection by compressed air (A). The method according to claim 1 or 4, After the powdery fastener (G) feed pipe (25) and the compressed air (A) supply pipe 41 through the mixing side 31, the powdery fastener (G) and compressed air (A) first mixed, Shotcrete pouring further comprising the injection through the injection pipe (32) to the mixing means (30) to be injected through the injection hole 61 of the "a" type injection nozzle 60 while mixing again with the concrete milk (C) Dry powder mixing device of equipment.
KR1020090064573A 2009-07-15 2009-07-15 A quickly hardening agent mixture machine for shotcrete KR20090086378A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101222407B1 (en) * 2011-06-29 2013-01-14 현대건설주식회사 Method and device to provide accelerant automatically for shotcrete, and concrete placer installed the device
KR102138695B1 (en) * 2020-03-23 2020-07-28 주식회사 대우건설 Accelerators powder uniform mixture type shotcrete apparatus
KR20210095454A (en) 2020-01-23 2021-08-02 진원화 Air supplying apparatus for the shotcrete of the pump car

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101222407B1 (en) * 2011-06-29 2013-01-14 현대건설주식회사 Method and device to provide accelerant automatically for shotcrete, and concrete placer installed the device
KR20210095454A (en) 2020-01-23 2021-08-02 진원화 Air supplying apparatus for the shotcrete of the pump car
KR102138695B1 (en) * 2020-03-23 2020-07-28 주식회사 대우건설 Accelerators powder uniform mixture type shotcrete apparatus

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