JP3007004B2 - Ready-mixed concrete quick-hardening material supply system and concrete placing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system for supplying a ready-mixed concrete used for forming a concrete wall on the inner peripheral wall of a tunnel and a hardened material for accelerating the hardening time of the concrete, and a system for supplying the same. The present invention relates to a method of placing ready-mixed concrete.

[0002]

2. Description of the Related Art In general, after excavation of a tunnel, ready-mixed concrete mixed with a hardened material is sprayed on its inner peripheral wall surface, and the inner peripheral wall surface of the tunnel is protected by the sprayed concrete wall in a short time. Also, after excavation of the tunnel, with the arc-shaped formwork placed near the inner peripheral wall of the tunnel,
A method has been developed in which ready-mixed concrete is filled between the formwork and the inner peripheral wall of the tunnel together with a hardened material to prevent collapse of the inner peripheral wall of the tunnel.

[0003]

In the former protection work, fresh concrete is sprayed, so there is a problem in the environmental protection in the tunnel, and since the concrete surface becomes uneven, the workability of setting a waterproof sheet is also affected. There is. The latter ready-mixed concrete / rapid hard material supply system consists of a concrete pump that pumps ready-mixed concrete from the storage tank, a ready-mixed concrete / rapid hard material stirring nozzle installed at the end of the concrete transfer pipe, and a And a rapid-hardening material supply device for supplying the rapid-hardening material pressure-fed by an injection pump into the stirring nozzle. In addition, in the storage tank for the rapidly hardened material, the rapidly hardened material is previously held in a state of being stirred by the stirring blades. It was to be mixed into ready-mixed concrete and supplied into a concrete formwork while being stirred by a stirring nozzle.

In the above-described conventional ready-mixed concrete supply system, even when the supply of ready-mixed concrete is stopped after the rapid-hardening material injection pump is started, the rapid-hardening material is supplied from the quick-hardening material supply pipe while the electromagnetic switching valve is held in the drain port. The material was discarded. For this reason, there has been a problem that the amount of the rapidly hardened material is increased and the cost cannot be reduced. If the hard material injection pump is stopped and the hard material is not discarded, the hard material hardens in the supply pipe and closes the pipe, or the passage area of the pipe becomes small and the concrete hardened. There is a problem that the supply amount of the hardened material is reduced, and the hardening time of the concrete is prolonged or the hardening is insufficient.

In the conventional supply system, if the pump for supplying the hard material is stopped for some reason, the inside of the hard material supply pipe downstream of the pump is cleaned, so that the hard material is stored. The washing water is supplied into the tank, and the washing water flows into the supply pipe through the gap of the pump from the storage tank to wash the supply pipe. Therefore, the rapid hardened material in the storage tank must be discarded from the drain port. There was a problem.

[0006] In the latter ready-mixed concrete supply system, an operator operates a start switch of the concrete supply pump and a start switch of the supply pump of the hardened material, respectively. For this reason, there is a possibility that the rapid hardened material may be supplied later than the supply of the ready-mixed concrete, or vice versa, or the supply of the fast-hardened material may be forgotten. There was a problem that it was not possible to supply.

A first object of the present invention is to provide a concrete / hard material supply system which solves the above-mentioned problems in the prior art, reduces the amount of waste of the hard material, and can reduce the cost. It is in.

A second object of the present invention is, in addition to the above object, a concrete / hard material capable of easily discharging residual hard material in a supply pipe from a supply pump for a hard material to a stirring nozzle. To provide a supply system.

A third object of the present invention, in addition to the first object, is a concrete / rapid hard material supply system capable of reliably and promptly performing a switching operation of a circulation switching valve when a concrete pump is stopped. Is to provide.

A fourth object of the present invention, in addition to the above-mentioned second object, is to provide a concrete / emergency method capable of reliably and promptly switching the circulation switching valve and the drain switching valve when the concrete pump is stopped. It is to provide a hardwood supply system.

A fifth object of the present invention, in addition to the first object, is to reliably clean the rapid hard material supply pipe on the downstream side of the rapid hard material pump when the pump for pumping the fast hard material breaks down. It is an object of the present invention to provide a ready-mixed concrete / rapid-hardened material supply system which can be performed and eliminates the disposal of the rapid-hardened material in a storage tank and can reduce the cost.

A sixth object of the present invention, in addition to the fifth object, is to provide ready-mixed concrete which can easily discharge contaminated water from the supply pipe to the outside during the cleaning of the supply pipe for the rapidly hardened material. It is to provide a hardwood supply system.

A seventh object of the present invention, in addition to the first object, is to provide a ready-mixed concrete / hard-hardened material supply system which can supply a hardened material to ready-mixed concrete in a timely and reliable manner. .

An eighth object of the present invention, in addition to the seventh object, is to provide a concrete / rapid hard material supply system which can timely inject a rapid hard material into a concrete transfer pipe. Is to do.

Further, a ninth object of the present invention is as described above in the seventh aspect.
Another object of the present invention is to provide a concrete / hard material supply system capable of simplifying the structure of an automatic hard material supply mechanism.

Further, a tenth object of the present invention is to provide a concrete placing method using a concrete / rapid-hardening material supply system capable of reducing the amount of waste of the rapid-hardening material and reducing the cost. .

[0017]

According to the first aspect of the present invention,
A concrete pump for pumping the ready-mixed concrete to the transfer pipe, a stirring storage tank for storing the hardened material for rapidly hardening the ready-mixed concrete while stirring, and connected to the transfer pipe, and stirring the ready-mixed concrete and the hardened material. A stirring nozzle to be supplied into the mold, a rapid hard material supply pipe connected between the stirring reservoir and the stirring nozzle, and a rapid hard material pump provided in the rapid hard material supply pipe; In a ready-mixed concrete / rapid hard material supply system comprising: a means for interposing a circulation switching valve in the supply pipe of the rapid hard material, and connecting the circulation switching valve and the stirring storage tank by a circulation pipe. I have.

According to a second aspect of the present invention, in the first aspect, a drain switching valve for switching the supply pipe between an open circuit port and a drain port is provided for the rapid hard material supply pipe downstream of the circulation switching valve. I have.

According to a third aspect of the present invention, in the first or second aspect, the circulation switching valve is constituted by an electromagnetic valve, and the electromagnetic switching valve is connected to the open port of the rapid hardening material supply pipe when the concrete pump is stopped. A switching means for switching to the circulation port is provided.

According to a fourth aspect of the present invention, in the second aspect, the circulation switching valve and the drain switching valve are constituted by solenoid valves, and the circulation switching valve and the drain switching valve supply the hard material when the concrete pump is stopped. There is provided switching means for switching from the open port of the pipe to the circulation port and the drain port, respectively.

According to a fifth aspect of the present invention, in the first aspect, the supply pipe on the downstream side of the pump for the rapid hardening material and the cleaning fluid supply source are communicated by a communication pipe, and a connecting portion between the communication pipe and the supply pipe is provided. A means of interposing a switching valve is employed.

According to a sixth aspect of the present invention, in the fifth aspect, a means for providing a drain switching valve for switching between a port for opening the supply pipe and a drain port at at least one position of the supply pipe. .

According to a seventh aspect of the present invention, in the first aspect, a detector is provided in the transfer pipe and detects whether or not fresh concrete has arrived, and agitates the rapidly hardened material based on a detection signal of the detector. A mechanism for automatically supplying the concrete into the concrete transfer pipe on the upstream side of the nozzle.

According to the invention of claim 8, in claim 7, the nozzle for injecting the rapid hardening material is provided on the downstream side of the ready-mixed concrete detector. In the ninth aspect of the present invention, the automatic hard material supply mechanism according to the seventh or eighth aspect is arranged in the rapid hard material supply pipe, and is connected to the open circuit port and the drain by a detection signal from a ready-mixed concrete detector. This is a drain switching valve that is switched between a port and a port.

Further, according to the tenth aspect of the present invention, while the ready-mixed concrete is not supplied to the stirring nozzle by the concrete pump, the rapidly hardened material in the stirred storage tank is fed from the rapidly hardened material supply pump into the supply pipe, and the circulation switching valve is operated. Switch to the circulation port to recirculate the hardened material into the stirring storage tank, hold the circulation switching valve in the supply port in synchronization with the ready-mixed concrete being supplied to the stirring nozzle, and operate the hardened material supply pump. The rapid hardening material is mixed into the ready-mixed concrete, and the fast-hardening material mixed and stirred by the stirring nozzle is supplied to the molding space.

[0026]

According to the first aspect of the invention, when the circulation switching valve is switched to the circulation port in a state where the concrete pump is stopped, the rapidly hardened material is returned from the supply pipe to the stirred storage tank via the circulation pipe. You. Therefore, the hardened material is not discharged from the supply pipe and is effectively used at the time of the next ready-mixed concrete supply. In addition, since the rapid hard material circulates in the rapid hard material supply pipe, the rapid hard material in the supply pipe does not harden, and the rapid hard material is smoothly supplied again.

According to the second aspect of the present invention, when the drain switching valve is switched to the drain port in a state where the circulation switching valve is switched to the circulation port, the residual rapidity in the supply pipe between the circulation switching valve and the stirring nozzle is increased. Hardwood is discharged from the drain port. For this reason, the residual hard material in the supply pipe downstream of the circulation switching valve is easily discharged.

According to the third aspect of the invention, when the concrete pump is stopped, the switching means is operated, and the circulation switching valve is reliably and quickly switched from the open circuit port to the circulation port, and the hard material is supplied from the supply pipe. It is returned to the circulation pipe.

According to the fourth aspect of the present invention, when the concrete pump is stopped, the switching means is operated, and the circulation switching valve is reliably and quickly switched from the open port to the circulation port, and the hard material is supplied from the supply pipe. It is returned to the circulation pipe.
Further, the drain switching valve is switched to the drain port, and the remaining rapid hardened material in the supply pipe downstream of the circulation switching valve is discharged from the supply pipe to the outside via the drain port.

According to the fifth aspect of the present invention, in addition to the operation of the first aspect, when the rapid hard material supply pump is stopped due to a failure or the like and the switching valve is opened, the cleaning fluid is supplied from the cleaning fluid supply source. Is supplied into the supply pipe, so that the inside of the rapid hard material supply pipe downstream of the pump is washed. Therefore, there is no need to supply a cleaning fluid into the agitated storage tank and wash the supply pipe for the abrupt hardened material, and the abruptly hardened material in the agitated storage tank is effectively used after the failure of the pump is restored. .

According to the sixth aspect of the present invention, in addition to the operation of the fifth aspect, if the drain switching valve is switched to the drain port with the switching valve opened, the dirty water after washing in the supply pipe is drained from the drain port. It is discharged outside.

According to the seventh aspect of the present invention, in addition to the function of the first aspect, the presence or absence of the arrival of the ready-mixed concrete is detected by the detector, and the hardened material is automatically placed in the transfer pipe of the ready-mixed concrete according to the arrival detection signal. Injected. This rapidly hardened material is stirred and kneaded with a ready-mixed concrete by a stirring nozzle,
It is supplied to the molding space inside the mold. Thus, claim 7
According to the invention described above, the rapidly hardened material can be reliably supplied to the ready-mixed concrete in a timely manner.

According to the eighth aspect of the present invention, since the detector for the ready-mixed concrete is provided on the upstream side of the nozzle for injecting the rapidly hardened material, the detector for detecting the arrival of the concrete and injecting the rapidly hardened material is provided. Due to the time difference, the rapid hardening material is properly injected into the concrete from the beginning.

According to the ninth aspect of the invention, when the drain switching valve is switched from the drain port to the open circuit port, the hard material is injected into the ready-mixed concrete from the injection nozzle. According to the ninth aspect of the invention, the automatic hard material supply mechanism can be simplified.

According to the tenth aspect of the present invention, when the concrete pump is stopped, the rapidly hardened material is circulated through the supply pipe to the stirring tank, and the rapidly hardened material is not discharged from the supply pipe. It is used effectively when supplying ready-mixed concrete.
In addition, since the rapid hard material circulates in the rapid hard material supply pipe, the rapid hard material in the supply pipe does not harden, and the rapid hard material is smoothly supplied again.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is embodied in a working vehicle in which a concrete wall is cast on the inner peripheral surface of a tunnel will be described with reference to the drawings.

As shown in FIG. 5, a concrete wall casting vehicle 3 is mounted on a traveling road surface 2 in the tunnel 1 so as to be able to travel in the tunnel direction. The body frame 4 of the work vehicle 3 has driving wheels 5, and first to third for casting concrete along the inner peripheral surface 1 a of the tunnel via the form support mechanism 6 on the body frame 4. Are supported as shown in FIG. The form support mechanism 6
Are formed on the inner peripheral surface 1a of the
Is provided with a cylinder 9 for approaching or separating from. The first mold 7A is supplied with ready-mixed concrete.
A stirring nozzle 10 is provided, a second stirring nozzle 11 is mounted on the second mold frame 7B, and a third stirring nozzle 12 is mounted on the third mold frame 7C. And formwork 7A
7A to 7C are supported by the nozzles 10 to 12 in a state in which the nozzles 7 to 7C are supported at predetermined intervals along the inner peripheral surface of the tunnel 1.
A fresh concrete kneaded with a hardened material is supplied between the inner peripheral surface 1a and the concrete wall, and a concrete wall is cast into the tunnel inner peripheral surface 1a in two stages. That is, the first and second molds 7
A and 7B synchronize concretely with the divided areas 13a and 13b on the lower left and right sides of the inner peripheral surface 1a divided into five equal parts. After that, both the molds 7A and 7B are moved to the intermediate regions 13c and 13d by a position switching mechanism (not shown), and the uppermost region 13e corresponding to the third mold 7C and the concrete walls of the regions 13c and 13d are struck. Make settings.

A system for supplying ready-mixed concrete and hardened material mounted on the concrete working vehicle 3 will be described with reference to FIGS. Transfer pipes 17 and 18 are connected to the first and second concrete pumps 15 and 16 for pumping ready-mixed concrete, and the transfer pipe 17 is electrically driven.
The transfer pipe 21 is connected via a port pipe switching device 19, and the first stirring nozzle 10 is connected to the tip of the pipe 21. A transfer pipe 22 is connected to the transfer pipe 18 via an electric two-port piping switching device 20, and the tip of the transfer pipe 22 is connected to the second stirring nozzle 11. Further, the third stirring nozzle 12 is connected to a transfer pipe 23 connected to the pipe switching device 19.

Accordingly, when the pipe switching device 19 is switched, the first or third stirring nozzle 10 is moved from the first pump 15.
Or 12 while the ready-mixed concrete is pumped and the pipe switching device 19 is switched to the drain port.
Each transfer pipe 17, 21, 23 is also switched to a drain port. When the pipe switching device 20 is switched to the drain port, the transfer pipes 18, 22 are each switched to the drain port.

Next, an apparatus for supplying a rapidly hardened material to ready-mixed concrete will be described. Agitation storage tank 25 for hardwood
A stirrer 27 is provided in the storage tank 25, and the hard material is stirred by the stirrer motor 28. The storage tank 25 is provided with a stirrer 29 for preventing sedimentation. The stirrer 29 is rotated by a stirring motor 30. Further, the rapidly hardened material in the auxiliary stirring tank 26 is stirred by a hand-type stirrer 31.

At the upper part of the storage tank 25, an upper limit level detector 33 for detecting the storage amount of the hardened material is provided, and at the lower part, a lower limit level detector 34 is provided. Storage tank 25
First and second pumps 35 and 36 for supplying a hardened material are provided at the lower end of the pump, and first and second supply pipes 37 and 38 are connected to both pumps. 37 is connected to the first stirring nozzle 10, and the second supply pipe 38 is connected to the second stirring nozzle 11. A third supply pipe 40 is branched and connected to the middle of the first supply pipe 37 by an electromagnetic switching valve 39, and the tip of the third supply pipe 40 is connected to the third stirring nozzle 12.

The first and second rapid hard material supply pipes 37, 3
8, the first and second electromagnetic circulation switching valves 41, 4
2 are provided, and both switching valves 41 and 42 are provided with the first hard material
One end of each of the second circulation tubes 43 and 44 is connected, and the other end of each of the tubes 43 and 44 is connected to the storage tank 25. The circulation pipes 43 and 44 are set to be lower toward the storage tank 25 side, and the two electromagnetic switching valves 41 and 42 are connected to the supply pipe 3.
With the ports kept open to ports 7 and 38, the rapid hardened material remaining in both pipes 37 and 38 is discharged to the storage tank 25,
It does not remain in both tubes 43 and 44. First to first
The third supply pipes 37, 38, 40 have respective pipes 37, 38,
Two-port electromagnetic drain switching valves 45A, 45B, and 45C each having a drain port for discharging residual air, a hard material, an auxiliary agent, or sewage after washing are provided.
Also, pipes 37 and 3 on the downstream side of the electromagnetic switching valves 45A to 45C.
First and third injection nozzles 46 </ b> A to 46 </ b> C, which will be described later, are connected to the distal ends of the nozzles 8 and 40, respectively. These injection nozzles 46A to 46C are connected to concrete transfer pipes 21 and
2 and 23, it is possible to supply a hardened material into each pipe. The electromagnetic switching valves 45A to 45C are arranged near the first to third injection nozzles 46A to 46C, and substantially eliminate residual air in the supply pipes 37 and 38 as described later. The electromagnetic switching valves 39 and 41 are provided with an electromagnetic switching valve 45A.
, The electromagnetic switching valve 42 is disposed in proximity to the electromagnetic switching valve 45B, respectively, circulates the hard material substantially over the entire area in the supply pipes 37 and 38, and hardening of the hard material in the supply pipe does not progress. Like that.

Electromagnetic switching valves 47 and 48 used for cleaning the inside of the first and second hard material supply pipes 37 and 38 are provided in the middle of the supply pipes, respectively. The washing water can be supplied to the rapid hardening material supply pipes 37 and 38. The two supply pipes 37, 38 are provided with pumps 35, 36 and electromagnetic drain switching valves 49, 50 for discharging sewage after washing at the time of washing the supply pipes 37, 38, respectively.

On the other hand, first and second auxiliary supply pumps 52 and 53 are connected to the auxiliary tank 51, and the auxiliary supply pipe 5
The auxiliary agent for adjusting the hardening time of the hardened material can be supplied from 4,55 to the first and second hardened material supply pipes 37,38.
The two supply pipes 54, 55 are connected to the pipes 3 via check valves 56, 57.
7, 38 to prevent the hardened material from entering the pipes 54, 55.

The two supply pipes 37, 38 and 54, 55
Is provided with a flow meter 61 and a pressure gauge 62. Further, manual valves 63 are provided at the lower end of the storage tank 25, the lower part of the auxiliary tank 51, and the supply pipes 54 and 55, respectively, to remove the residual rapid hardening material and auxiliary in the tanks 25 and 51 and the pipes 54 and 55. Can be discharged.

Next, an apparatus for supplying cleaning water to a supply system for ready-mixed concrete / rapidly hardened material will be described.
A water supply pipe 66 is connected to a water supply pump 65 connected to a water source (not shown). This water supply pipe 66 has a manual valve 6
7 and 68 are connected to supply the first and second concrete pumps 15 and 16 with cleaning water. A manual valve 69 is connected to the water supply pipe 66 so that cleaning water can be supplied into the storage tank 25. Further, the manual valve 70 can supply cleaning water into the auxiliary agent tank 51. Further, a plurality of electromagnetic on-off valves 86 are connected to the water supply pipe 66 so that water can be supplied when the molds 7A to 7C are washed as described later.

The switching valves 39, 41, 42, 4
5A to 45C, 47 to 50, manual valve, 63, 67 to 70
Is a ball type valve. Next, based on FIG.
The attachment configuration of the first to third stirring nozzles 10 to 12 to the third to seventh molds 7A to 7C will be described. Since the respective mounting configurations are the same, the mounting configuration of the first stirring nozzle 10 to the first mold frame 7A will be described.

On one side of the first mold frame 7A, a movable mold frame 75 is switchable between a retracted position and a molding position by a position switching mechanism 76. Then, the form support mechanism 6 and the cylinder 9 are operated to contact one end of the first form 7A with one end of the already cast concrete wall 77, and the movable form 75 is moved to the retreat position by the position switching mechanism 76. The molding space 78 for molding the concrete wall 77 is defined by these members in a state where the molding space 78 is switched to the molding position.

The stirring nozzle 10 is mounted on the mold 7A via a mounting frame 80 so as to be switchable between a ready-mixed concrete supply position and a washing position by a position switching mechanism 81. The stirring nozzle 10 is provided with a stirring blade (not shown) inside, and the raw concrete and the rapidly hardened material are stirred by rotating the blade by a motor 82. At the washing position of the stirring nozzle 10, the concrete discharge port provided in the mold 7A is shielded by a shielding plate (not shown). A transfer nozzle 21 connected to the stirring nozzle 10 is provided with a penetrating nozzle 46A made of a rapidly hardened material. The injection nozzle 46
A detector 83 for detecting the presence or absence of ready-mixed concrete is provided in the upstream transfer pipe 21 of A. Also, formwork 7A
A water supply nozzle 84 for supplying cleaning water to the stirring nozzle 10 switched to the cleaning position is supported, and an electromagnetic on-off valve 86 is provided in the middle of a water supply pipe 85 communicating with the water supply nozzle 84.

Next, a control device for controlling various operations of the above-described system will be described. As shown in FIG. 4, a central processing unit 92 is accommodated in the control device 91. The device 92 includes a read-only memory 93 for storing various information in advance and a random access memory 94 for storing detection data and calculation data. Each is connected.
Further, an input interface 95 is connected to the control device 91, and the above-mentioned ready-mixed concrete detector 83, rapid hardened material upper level detector 33, lower level detector 34, flow meter 61 are provided.
And various data detected by the pressure gauge 62 and the like. The input interface 9
The 5 start switch 90, the manual-automatic mode switch MS, push button switch PS ₁₀ of the agitation nozzles 10 to 12 ~
PS ₁₂ , push button switches PS ₁₅ , PS ₁₆ , PS ₃₅ , PS ₃₆ for pumps ₁₅ , ₁₆ , ₃₅ , ₃₆ , electromagnetic switching valve 39,
41,42,45A～45C, the manually operated pushbutton switch PS ₃₉ of _{47~50, PS 41, PS 42,} PS 45A ~P
S _45C, PS ₄₇ ~PS _50, etc. are connected. further,
An output interface 96 is connected to the control device 91, and the above-described stirrers 27 and 29 and various pumps 15 and 1 are connected.
6, 35, 36, 52, 53 motors, electromagnetic switching valve 3
9, 41, 42, 45A to 45C, 47 to 50, an electromagnetic on-off valve 86 and the like are connected.

As shown in FIG. 7, an inclined pipe 100 is integrally welded to the case main body 10A of the first stirring nozzle 10, and the pipe 100 and the supply pipe 21 are connected to each other by a connection pipe 101. As shown in FIG. 8, the connection fitting 102 fastens and fixes the joined ends of the tubes 21, 100, and 101, respectively. The ready-mixed concrete detector 83 is provided on the outer peripheral surface of the connecting pipe 101. The injection nozzles 46A to 46C are also supported through the connecting pipe 101 so as to be located on the downstream side of the detector 83. The nozzles 46A to 46C are configured as shown in FIGS.

As shown in FIG. 11, a nozzle body 106 is inserted into the outer end of a holder 105 which is supported by being penetrated by the connecting pipe 101, and is fixed by screwing a fastening ring 107 to the holder 105. The rotation of the holder 105 and the nozzle body 106 is restricted by the rotation preventing pin 108.

The nozzle main body 106 has injection ports 109 formed at a total of four locations. A cylindrical check valve 110 made of rubber is fitted on the outer peripheral surface of the nozzle body 106. As shown in FIG. 12, a semi-cylindrical shielding portion 111 is formed on the inner side of the holder 105 only on the upstream side (left side in FIG. 12) in the moving direction of the ready-mixed concrete, and the ready-mixed concrete 10 strongly contacts the check valve 110. And check valve 11
0 wear is prevented. A cover plate 112 is attached to a tip end of the nozzle body 106 by a screw 113, and rotation is regulated by a rotation preventing pin 114. This lid plate 1
The check valve 12 prevents the check valve 110 from falling off the nozzle 106.

Therefore, when the rapid hard material is pressure-fed into the nozzle body 106, the check valve 110 is elastically deformed in the radially expanding direction from the inlet 109 so that the quick hard material is removed from the gap between the main body 106 and the check valve. It is injected into the connecting pipe 101. When the pouring is completed, the check valve 110 is brought into close contact with the main body 106 to prevent the concrete from entering the pouring port 109.

Next, the operation of the ready-mixed concrete / rapidly hardened material supply system configured as described above will be described. 1 and 3 show a state in which the ready-mixed concrete / rapid hard material supply system is stopped. When the start switch 90 is turned on, the control device 91 is started. As a preparatory work before concrete casting, the hard material is stored in the storage tank 25, the motor 30 of the sedimentation prevention stirrer 29 is started to stir and knead the hard material, and the motor 28 is started by the stirrer 27. The hardened material is stirred and kneaded. Further, an auxiliary agent for adjusting the hardening time of the rapidly hardened material is stored in the auxiliary agent tank 51.

In this embodiment, the concrete feed pump 1
The manual / automatic mode changeover switch MS shown in FIG. 4 is switched to the manual mode only during the preparation of the operation at 5 and 16, and the hard material is circulated by manual operation. That is, the operation of the push button switches PS ₄₁ and PS ₄₂ switches the electromagnetic switching valves 41 and 42 from the supply ports to the circulation ports, and the operation of the push button switches PS _{47 to} PS ₅₀ switches the electromagnetic switching valves 47 to 50 to the communication ports. When the pumps 35 and 36 are activated by the pump push-button switches PS ₃₅ and PS ₃₆ in the same state, the rapidly hardened material in the storage layer 25 is stirred from the first and second supply pipes 37 and 38 to the switching valve 41. , 42 to the circulation tubes 43, 44, and is returned to the storage tank 25. Therefore, the hard material does not harden in the supply pipes 37 and 38.

Next, referring to FIGS. 6 and 7, the form support mechanism 6 is operated to place the first and second forms 7A and 7B at the concrete wall setting positions in the tunnel 1 (divided areas 13a and 13b).
Go to

Immediately before starting the placing of ready-mixed concrete, the electromagnetic switching valves 41 and ₄₂ are operated by the push button switches PS ₄₁ and PS _42.
Is switched from the circulation port to the supply port, and the electromagnetic switching valve 45 is switched by the push button switches PS _45A and PS _45B.
A and 45B are switched from the supply port to the drain port. Then, the air remaining in the supply pipes 37, 38 from the electromagnetic switching valves 41, 42 to the first and second injection nozzles 46A, 46B is discharged from the drain ports of the switching valves 45A, 45B, and the discharge of the residual air is completed. After that, the hardened wood was the first and second
It is confirmed that it has reached the injection nozzles 46A and 46B. When the electromagnetic switching valves 45A, 45B are switched from the drain port to the supply port by the push button switches PS _45A , PS _45B after the confirmation, the rapid hard material is supplied to the inside of the distal end of the transfer pipe 21.

In synchronization with the supply of the rapid hardened material, the ready-mixed concrete supply pump 1 is operated by the push button switches PS ₁₅ and PS _16.
When the transfer pipes 5 and 16 are activated, the transfer pipes 17 and 18 and the switching device 1
Fresh concrete is supplied to the first and second stirring nozzles 10 and 11 through the transfer pipes 9 and 20 and the transfer pipes 21 and 22. Therefore, the hard concrete is mixed with the ready-mixed concrete, and the ready-mixed concrete and the quick-hardened material are efficiently stirred and kneaded by the stirring nozzles 10 and 11 to form a molding space 78 (FIG. 7) in the first and second molds 7A and 7B. 7). Since the supplied ready-mixed concrete contains a hardened material, it is hardened in a single hour, and the concrete wall 77 is poured into the divided areas 13a and 13b.

When the first and second auxiliary supply pumps 52 and 53 are operated by operating a push button switch (not shown) as necessary, the auxiliary is supplied from the supply pipes 54 and 55 to the check valves 56 and 57.
Is supplied into the supply pipes 37 and 38, and the auxiliary agent is mixed into the hardened material to adjust the hardening time of the ready-mixed concrete.

When the supply time of the hardened material is switched to the automatic mode by the manual / automatic mode changeover switch MS instead of the manual operation described above, the hardened material is supplied to the ready-mixed concrete in a timely manner as follows. Is done. That is, rapid hardwood first and second injection nozzles 46A, after confirming that it has reached 46B, temporarily stopped abruptly hardwood supply pump 35, 36 by a push button switch PS _35, PS _36. Also, the pushbutton switches PS _45A and PS _45B are operated to operate the electromagnetic switching valves 45A and 45A.
After B is switched from the drain port to the supply port, when the first and second concrete pumps 15 and 16 are activated by the push button switches PS ₁₅ and PS ₁₆ , the ready-mixed concrete is mixed with the first and second stirring nozzles 10 and 10. It is pumped toward 11. When the arrival of the ready-mixed concrete is detected by the detector 83, this detection signal is sent to the control device 91, so that the first and second supply pumps 35 and 36 are automatically started, and the first and second injection pumps 35 and 36 are injected. Rapid hardened material is mixed into the ready-mixed concrete from the nozzles 46A and 46B. If at least one of the aforementioned electromagnetic switching valves 41, 42, 45A, 45B, 47 to 50, etc. has a port abnormal (drain) state,
Manual / automatic mode switch MS for pumps 35 and 36
After the automatic mode is selected, when the arrival of concrete is detected by the detector 83, the hardened material is supplied in a timely and reliable manner.

When the concrete wall 77 is cast by the molds 7A and 7B, the push button switches PS ₁₅ and P
The first and second concrete pump S ₁₆ is operated 1
5, 16 are stopped. When the pumps 35 and 36 are automatically stopped by the stop signal of the concrete pump, the supply of the hard material is stopped. After the pumps 35 and 36 are stopped, the mode changeover switch MS is operated to switch from the automatic mode to the manual mode, and the manual hardening operation of the hardened material during the operation preparation of the concrete supply pumps 15 and 16 is performed. .

On the other hand, after the first and second concrete pumps 15 and 16 are stopped, the push button switches PS ₁₀ and P
Motor 82 of the two stirring nozzles 10, 11 is stopped by the S _11. Then, the pipe switching devices 19 and 20 are operated by an operator.
Are switched, and the pipes 17, 21, 18, and 22 are respectively switched to drain ports. In FIG. 7, the position switching mechanism 81 is operated to operate the first and second stirring nozzles 1.
0, 11 are switched from the operating position to the cleaning position. Then, the electromagnetic on-off valve 86 for cleaning is operated and the water supply pipe 66 is opened.
The washing water is supplied to the pipe 85 and the water supply nozzle 84 from the above, so that the inside of the stirring nozzles 10 and 11 is washed. This washing water passes through the inside of the transfer pipe 21 (22) and the pipe switching device 19 (2).
0) is discharged to the outside through the drain port, and the stirring nozzle 1
0 (11) and the inside of the pipe 21 (22) are cleaned. During this cleaning operation, the injection nozzles 46A. 46B is a check valve 110
Therefore, the dirty water does not enter the supply pipes 37 and 38.

After the completion of the cleaning operation, the electromagnetic switching valve 86 is switched to the closing port, and the position switching mechanism 81 is operated to switch the stirring nozzles 10 and 11 to the operating positions shown in FIG.

When the hard material in the storage tank 25 is reduced and the lower limit level detector 34 is operated, a stop signal is output from the control device 91 to the pumps 15 and 16, and the concrete placing operation is started. Interrupted. Even when the operation is interrupted, the switching valves 41 and 42 are operated by the push button switches PS ₄₁ and PS ₄₁ .
_The hardened material is operated by ₄₂ and is returned to the storage tank 25 from the circulation pipes 43 and 44. In addition, since an operation signal is output from a control device 91 to an alarm buzzer (not shown) and an alarm sound is generated, the hard material is stored in the auxiliary stirring tank 26 and supplied into the storage tank 25 while being stirred by the stirrer 31. I do.

After the concrete wall 77 has hardened, the two molds 7A, 7B are separated from the wall 77 by the cylinder 9, and are moved to the next concrete wall 77 setting position (13c, 13d) by a position switching mechanism (not shown). Is done. Then, in FIG. 3, the pipe switching devices 19 and 20 are switched to connect the pipes 17 and 23 and the pipes 18 and 22 respectively.

The inner peripheral surface of the top of the tunnel 1 by the formwork 7C
Concentration of divided area 13e and intermediate divided areas 13c and 13d
The work of placing the reed wall 77 is performed as follows. Work
A pipe switching device 19 connects the pipes 17 and 23 by a trader,
The pipe switching device 20 is connected to the port that connects the pipe 18 and the pipe 22.
Switchable and push button switch PS ₃₉By
Supply pipe 4 in which magnetic switching valve 39 communicates with third stirring nozzle 12
While the port is switched to the port communicating with
The port pumps 15 and 16 are started. And pump 1
5 to pipes 17 and 23, and pump 16 to pipes 18 and 22
The ready-mixed concrete pumped into the
When they are output, the electromagnetic switching valves 41 and 42 are supplied from the circulation port.
It is switched to the supply port, and the hardwood is
From the supply pipe 40 to the third stirring nozzle 12, from the supply pipe 38 to the third stirring nozzle 12.
2 Supplied to stirring nozzle 11
Is supplied to the inside of the molds 7A to 7C. Concrete
After the completion of the installation of the heating wall 77, the first to third stirring nozzles 1
0-12 are cleaned by the same operation as described above.
You.

After the work of placing all the concrete walls 77 is completed, the manual valves 69 and 70 are opened and the water supply pipe 6 is opened.
6, water is supplied into the storage tanks 25 and 51, and the storage tanks 25 and 51 are supplied with water.
The residual hardwood and auxiliaries in 1 are cleaned. The washed water is discharged to the outside by opening the manual valve 63.
Also, the pushbutton switches PS ₄₉ and PS _{50 are used} to switch the solenoid valve 4.
When the solenoid valves 9A and 9B are switched to drain ports and the electromagnetic switching valves 45A and 45B are switched to drain ports by push button switches PS _45A and PS _45B , the push button switch P
When the electromagnetic switching valve 47 is opened by the S _47, PS _48, washing water into the supply pipe 37 from the water supply pipe 66 is supplied, the cleaning of both tubes is performed. At this time, the electromagnetic switching valves 41 and ₄₂ are switched to the circulation ports during the cleaning operation by the push button switches PS ₄₁ and PS ₄₂ , and the circulation pipes 43 and 4 are switched.
The cleaning in 4 is also performed. Further, the manual valves 67 and 68 are opened in a state where the pipes 17 and 18 are switched to the drain ports by the switching devices 19 and 20, and the pumps 15 and 16 are cleaned.

During the placing of ready-mixed concrete,
The first and second pumps 35 and 36 stop due to some cause.
If pressed, push button switch PS_45A~ PS_45Cas well as
PS ₄₉, PS₅₀Switching valves 45A to 45C and 4
9, 50 are switched to drain ports. Sync with this
Push button switch PS₄₇, PS₄₈The electromagnetic switching valve 4
7 and 48, the supply pipes 37, 3
8 is supplied with washing water, and the hard material in the pipes 37 and 38 is washed.
The drain valves of the switching valves 45A to 45C, 49 and 50 are cleaned.
Is discharged to the outside from the port. Therefore, the amount in the storage tank 25 is large.
Pumps 35 and 36 can be repaired without discarding
When it is restarted after recovery, the hard material in the storage tank 25
8 and re-doing concrete
Can be.

In the above-described embodiment, the hardened material in the pipes 37 and 38 is moved by the electromagnetic switching valves 41 and 42 to the circulation pipe 4.
As it was made to return to the storage tank 25 from 3,44,
The hardened material can be circulated in the pipe, the amount of the hardened material to be discarded can be reduced to reduce the cost, and the concrete wall 7
7 can be performed inexpensively.

In the above embodiment, after the arrival of the ready-mixed concrete is detected by the detector 83, the pumps 35, 3
6 is started to supply the hardened hard material to the stirring nozzles 10 to 12, so that the timing of supplying the hardened hard material to the ready-mixed concrete is properly and reliably increased, the work efficiency is increased, and the quick hardened material is filled. Can be performed reliably. The present invention is not limited to the above embodiment, but can be embodied as follows.

(1) When the concrete pumps 15 and 16 are stopped, the electromagnetic switching valves 41 and 42 are automatically switched to the circulation ports. In this case, the switching operation of the switching valves 41 and 42 can be reliably performed in a timely manner.

(2) When the switching valves 41 and 42 are switched from the circulation port to the supply port, a small amount of hard material flows into the circulation pipe. In this case, even if the circulation tubes 43 and 44 are not as low as the storage tank 25 side, the rapidly hardened material circulates in the tubes 43 and 44, so that the hardened hard material does not occur.

(3) In the above-described embodiment, when the pumps 35 and 36 are stopped, the electromagnetic switching valves 47 and 48 are manually switched to open ports to supply cleaning water or air. Switching valves 45A to 45C, 4 based on signals from failure sensors (not shown) of pumps 35 and 36
7 to 50, etc. are automatically switched to the cleaning port in a timely manner.

(4) In the above embodiment, the electromagnetic switching valves 49, 5
0 was used, but it should be omitted. In this case, the hard material supply pumps 35, 36 are controlled by the electromagnetic switching valves 47, 48.
During the cleaning operation of the supply pipes 37 and 38 on the downstream side, the electromagnetic switching valves 45A to 45C are switched to drain ports,
Foul water is discharged. In this alternative example, the electromagnetic switching valve 4
It is desirable to dispose the pumps 7 and 48 close to the pumps 35 and 36 to efficiently clean the supply pipes 37 and 38.

(5) As shown in FIG. 14, the check valve 110 of the injection nozzle 46A for the hard material is a plate-like valve for opening and closing the injection port 109. In this case, the structure of the nozzle 46A can be simplified as compared with the above embodiment.

(6) In the above embodiment, the injection nozzle 46A for the hardened material is disposed downstream of the detector 103. However, the distance between the two is determined in consideration of the transfer speed of the ready-mixed concrete and the supply time of the hardened material. It is desirable to set the optimum distance.

(7) In the above embodiment, the concrete wall is laid on the peripheral wall in the tunnel.
This may be embodied, for example, as a ready-mixed concrete / hardened material supply system for a working machine for placing a concrete wall for fixing a pier, or to various other concrete wall placing devices.

The technical ideas other than the claims that can be grasped from the above embodiment will be described below together with their effects. 2. The ready-mixed concrete / hard material supply system according to claim 1, wherein the circulation switching valve is configured to divide the hard material into the circulation pipe while the circulation port is switched from the circulation port to the supply port.

In the case of this system, the circulation pipe can be easily arranged without considering the difference in elevation. 7. The ready-mixed concrete / rapid hard material supply system according to claim 6, wherein the drain switching valve is provided near the pump of the supply pipe of the rapid hard material and near the stirring nozzle.

In the case of this system, the contaminated water after the cleaning in the supply pipe can be reliably and quickly discharged to the outside. In claim 7, the ready-mixed concrete / rapid-hardened hard concrete detector 83 and the injection nozzles 46A to 46C are attached to one connecting pipe 101, and the connecting pipe 101 is detachably connected to the middle of the concrete transfer pipe. Material supply system.

In the case of this system, the ready-mixed concrete detector 83 and the injection nozzle 46A to the concrete transfer pipe are provided.
46C can be easily attached and detached. Claim 7
In any one of the first to ninth embodiments, a ready-mixed concrete / hard material supply system, wherein the nozzle 46A for injecting the hard material into the transfer pipe 21 includes a check valve 110.

In the case of this system, it is possible to prevent the ready-mixed concrete from flowing back into the rapid-hardening material supply pipe after the pouring of the rapid-hardening material is stopped. The nozzle 46 according to any one of claims 7 to 8, which injects the rapidly hardened material into the transfer pipe 21.
A includes a check valve 110, which is
6 is formed of a rubber cylindrical body fitted to the outer peripheral surface of the check valve 110.
Ready-mixed concrete and hardwood supply system covered by 11.

In the case of this system, the injection port 1
09 can be smoothly performed and the close contact between the main body 106 and the check valve 110 is good, so that the backflow can be reliably prevented. Further, the wear of the check valve can be suppressed by the shielding portion 111.

In this specification, the switching valve includes various valves such as a spool valve and a flapper valve in addition to the ball type. In this specification, the cleaning fluid includes cleaning water containing a detergent and clean air in addition to the cleaning water.

In this specification, the concrete detector includes various types capable of detecting ready-mixed concrete, such as a pressure-sensitive type and a type using a contact.

[0087]

As described in detail above, the present invention has the following effects because it is configured as described in the claims.

The first aspect of the present invention has the effect of reducing the amount of waste of the rapidly hardened material and reducing the cost.
Further, the invention according to claim 2 has an effect that, in addition to the effect of the invention according to claim 1, the residual rapid hardened material in the supply pipe for the rapidly hardened material can be easily discharged.

Further, in addition to the effects of the first aspect, the third aspect of the present invention has the effect that the switching operation of the circulation switching valve can be performed reliably and quickly when the concrete pump is stopped. .

Further, in addition to the effect of the invention of the second aspect, the invention of the fourth aspect has the effect that the switching operation of the drain switching valve can be performed reliably and quickly when the concrete pump is stopped. .

According to the fifth aspect of the present invention, in addition to the effect of the first aspect of the present invention, in the event that the pump for pumping the rapid hardened material fails, the rapid hardened material supply pipe on the downstream side of the rapid hardened material pump is cleaned. The operation can be performed reliably, and the cost can be reduced by eliminating the disposal of the hard material in the storage tank.

According to the sixth aspect of the present invention, in addition to the effect of the fifth aspect, it is possible to easily discharge the contaminated water from the supply pipe to the outside during the cleaning of the supply pipe for the rapidly hardened material. The invention described in claim 7 has the effect of the invention described in claim 1,
The supply of the rapidly hardened material to the ready-mixed concrete can be performed in a timely and reliable manner.

[0093] In addition to the effect of the invention described in the seventh aspect, the invention described in the eighth aspect can more appropriately perform the timing of injecting the rapidly hardened material into the concrete transfer pipe. Further, the invention of claim 9 can simplify the structure of the automatic supply mechanism of the rapidly hardened material in addition to the effect of the invention of claim 7 or 8.

According to the tenth aspect of the present invention, it is possible to reduce the amount of waste of the rapidly hardened material and reduce the cost.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a main part embodying the present invention.

FIG. 2 is a circuit diagram of a main part in the same manner.

FIG. 3 is a circuit diagram showing a supply system for ready-mixed concrete and a rapidly hardened material.

FIG. 4 is a block circuit diagram showing a control device of the supply system.

FIG. 5 is a front view of a concrete work vehicle equipped with a supply system.

FIG. 6 is a front view showing only a formwork support mechanism of the concrete working vehicle.

FIG. 7 is a front sectional view showing a mounting state of a mold and a stirring nozzle.

FIG. 8 is a plan view showing a mounting position of a detector and an injection nozzle of a hard material.

FIG. 9 is a sectional view showing a positional relationship between a concrete detector and an injection nozzle.

FIG. 10 is a cross-sectional view showing a concrete detector and a rapid-hardening material injection nozzle.

FIG. 11 is an enlarged cross-sectional view of a rapid hardening material injection nozzle.

FIG. 12 is a cross-sectional view of a rapid hardening material injection nozzle.

FIG. 13 is a bottom view of a rapid hardening material injection nozzle.

FIG. 14 is a cross-sectional view showing another example of a rapid hardening material injection nozzle.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Tunnel, 3 ... Concrete working vehicle, 6 ... Form support mechanism, 7A-7C ... 1st-3rd form, 10-12 ... 1st-3rd stirring nozzle, 15, 16 ... 1st, 1st 2nd concrete pump, 25 ... stirred hardwood stirring and storage tank, 29 ... stirrer, 35, 36 ... first and second hardened hardwood supply pumps, 3
7, 38, 40 ... first, second, third rapid hard material supply pipes, 4
1, 42: circulation switching valve, 43, 44: first and second rapid hard material circulation pipes, 45A to 45C: drain switching valve, 46A to 4
6C: rapid hardening material injection nozzle; 47, 48: first and second electromagnetic switching valves for washing; 65: water supply pump; 66: water supply pipe;
1 ... control device, 103 ... ready-mixed concrete detector, 106
... nozzle body, 110 ... check valve, 111 ... shielding part.

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Shinji Masada 144, 14 Article, Masamasa-machi, Motosu-gun, Gifu Gifu Industry Co., Ltd. (58) Field surveyed (Int. Cl. ⁷ , DB name) E21D 11 / Ten

Claims (10)

(57) [Claims] 1. A concrete pump for pumping ready-mixed concrete to a transfer pipe, a stirring storage tank for stirring and storing a rapidly hardened material for rapidly hardening the ready-mixed concrete, A stirring nozzle for stirring and supplying the material into the mold; a rapid hard material supply pipe connected between the stirring reservoir and the stirring nozzle; a rapid hard material provided in the rapid hard material supply pipe In a ready-mixed concrete rapid hardening material supply system provided with a pump for pressure feeding, a circulation switching valve is interposed in the supply pipe of the rapid hardening material, and the circulation switching valve is connected to the stirring storage tank by a circulation pipe. Concrete hardened material supply system. 2. The ready-mixed concrete hard-hard material supply according to claim 1, further comprising a drain switching valve for switching the supply pipe between an open circuit port and a drain port with respect to the rapid hard material supply pipe downstream of the circulation switching valve. system. 3. The circulation switching valve according to claim 1, wherein the circulation switching valve is constituted by an electromagnetic valve, and the electromagnetic switching valve switches from the open port of the rapid hardened material supply pipe to the circulation port when the concrete pump is stopped. Ready-mixed hardwood supply system equipped with. 4. The circulation switching valve and the drain switching valve according to claim 2, wherein the circulation switching valve and the drain switching valve are circulated from an open port of the rapid hardened material supply pipe when the concrete pump is stopped. A ready-mixed concrete fast-hardened material supply system comprising a switching means for switching between a port and a drain port. 5. The supply pipe according to claim 1, wherein a supply pipe on the downstream side of the pump of the rapid hardening material and the cleaning fluid supply source are communicated by a communication pipe, and a switching valve is interposed at a connection between the communication pipe and the supply pipe. Ready-mixed concrete hardwood supply system. 6. A ready-mixed concrete hard material supply system according to claim 5, further comprising a drain switching valve for switching between a port for opening the supply pipe and a drain port at at least one position of the supply pipe. 7. The detector according to claim 1, wherein the detector is provided in the transfer pipe and detects whether or not the ready-mixed concrete has arrived, and the concrete on the upstream side of the stirring nozzle based on a detection signal of the detector. A ready-mixed concrete quick-hardening material supply system equipped with a mechanism for automatically supplying the transfer pipe. 8. The ready-mixed concrete rapid-hardening material supply system according to claim 7, wherein the injection nozzle provided at the tip of the fast-hardening material supply pipe is provided downstream of the ready-mixed concrete detector. 9. The rapid hardening material automatic supply mechanism according to claim 7, wherein the rapid hardening material automatic supply mechanism is disposed in a rapid hardening material supply pipe, and is connected between an open circuit port and a drain port by a detection signal from a ready-mixed concrete detector. A ready-mixed hardwood supply system that is a drain switching valve that is switched. 10. While the ready-mixed concrete is not supplied to the stirring nozzle by the concrete pump, the rapidly hardened material in the stirred storage tank is sent from the hardened material supply pump into the supply pipe, and the circulation switching valve is switched to the circulation port to change the rapidly hardened material. Is returned to the stirring storage tank, and in synchronization with the supply of the ready-mixed concrete to the stirring nozzle, the circulation switching valve is held at the supply port, and the quick-hardening material supply pump is operated to convert the quick-hardening material to the ready-mixed concrete. 2. A method for placing ready-mixed concrete using a ready-mixed concrete fast-hardened material supply system according to claim 1, wherein the mixed concrete mixed with the rapidly hardened material is stirred and kneaded by a stirring nozzle and supplied to the molding space.