JPH09218183A - Blocking monitoring device for ready mixed concrete force feed pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grasp the force-feeding state of ready mixed concrete in a piping route in real time by judging whether materials of the ready mixed concrete is separated or not from the friction sound detected by a sound sensor for detecting the friction sound between the ready mixed concrete in force feed and the inner wall of a piping. SOLUTION: A sound sensor 14 in mounted on the outer wall side of a piping 12 for force-feeding ready mixed concrete in the inner part, and the friction sound between ready mixed concrete 10 in force feed and the inner wall of the piping 12 is detected by the sensor 14. A concrete material separation judging means 16 judges whether the materials of the ready mixed concrete 10 are separated or not from the friction sound detected by the sensor 14, and outputs the judgment result to a monitor result display means 18.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for monitoring blockage of a pipe to which fresh concrete is pumped. When pouring concrete into a place where a concrete mixer truck cannot enter, the pipeline is extended to that position, and ready-mixed concrete is pumped through the pipeline.

[0002]

2. Description of the Related Art A route from a concrete pump to a concrete pouring position is determined, a fresh concrete pumping pipe is connected through the route, and the fresh concrete is pumped from the concrete pump. The ratio of the raw concrete pumping path to the material is preliminarily made appropriate based on past experience, and consideration is given so as not to block the raw concrete pumping path.

However, at the actual pouring site, the ready-mixed concrete pumping pipe is often blocked. In that case, the position where the plugging is likely to occur in the piping path is sequentially examined, the fresh concrete is removed from the closed pumping pipe, the piping path and the raw concrete material are changed, and then the pumping is restarted.

[0004]

Once the pumping pipe of ready-mixed concrete is closed, the position where it is likely to be closed is investigated, and the ready-mixed concrete is removed from the closed supply pipe, and after the piping path and ready-mixed concrete material are changed, Since pumping is restarted, this takes a long time, during which the construction work is interrupted.

The present invention has been made in view of the above conventional circumstances, and an object of the present invention is to provide an apparatus capable of grasping in real time the pumping state of green concrete in a pipe path.

[0006]

[Means for Solving the Problems]

First invention In Fig. 1, a sound sensor 14 is attached to the outer wall side of the pipe 12 to which the fresh concrete 10 is pumped, and detects a frictional sound between the fresh concrete 10 being pumped and the inner wall of the pipe 12, and a sound sensor. A concrete material separation judging means 16 for judging whether or not the material of the green concrete 10 is separated from the friction noise detected by 14, and a monitoring result outputting means 18 for outputting the judgment result of the concrete material separation judging means 16. Have. The second invention is an acoustic emission sensor which is attached to the outer wall side of a pipe through which fresh concrete is pumped, and which detects the friction noise between the fresh concrete being pumped and the inner wall of the pipe, and the waveform of the friction sound detected by the acoustic emission sensor. And a detected waveform output means for outputting. -Third invention A plurality of parts are attached to the outer wall of the pipe at positions where plugging of the fresh concrete is likely to occur in the route of the pipe through which the fresh concrete is pumped, and the friction noise between the fresh concrete being pumped and the inner wall of the pipe is detected Acoustic emission sensor of, and friction sound collecting means for continuously collecting the friction sound detected by each acoustic emission sensor,
Concrete material separation judging means for judging whether or not the raw concrete material is separated from the collected frictional sound, judgment result of the concrete material separation judging means, mounting position and detection of acoustic emission sensor corresponding to the judgment result And monitoring result output means for outputting a signal. (Function) First invention The sound sensor 14 is attached to the outer wall side of the pipe 12 to which the fresh concrete 10 is pumped, and the sound sensor 14 detects the friction noise between the fresh concrete 10 being pumped and the inner wall of the pipe 12. .

The concrete material separation judging means 16 detects the frictional noise detected by the sound sensor 14 from the raw concrete 10
Of the concrete material is judged, and the judgment result of the concrete material separation judging means 16 is monitored result outputting means 18
Will output. When the ready-mixed concrete 10 is in a good state and the aggregate is covered with mortar, the ready-mixed concrete is smoothly pumped through the pipe 12, and the friction noise between the ready-mixed concrete 10 and the pipe 12 is small.

When the aggregate and the mortar are separated from each other, the aggregate collides with the inner wall of the pipe 12 to increase the frictional force, and the pipe 12
Result in blockage. At this time, a large friction noise is generated, and therefore the concrete material separation determining unit 16 determines that the materials (aggregate and mortar) of the ready-mixed concrete 10 are separated from the friction noise detected by the sound sensor 14.

Construction site managers should use ready-mixed concrete 1
When it is confirmed from the output content of the monitoring result output means 18 that the material of 0 is separated, this is judged as a sign of pipe blockage, and appropriate measures are taken. -Second invention An acoustic emission sensor is used to detect the frictional noise between the fresh concrete during pumping and the inner wall of the pipe.

Acoustic emission sensors are used in geological surveys and the like, and efficiently and reliably detect the frictional noise between fresh concrete and its pumping. Further, the waveform of the fricative noise detected by the acoustic emission sensor is output as it is. The manager at the construction site installs the sensor at the position where the blocking trouble is likely to occur in the piping route, and predicts the position and the timing when the blocking trouble is likely to occur from the friction sound wave detected by the sensor.

When a blocking trouble occurs, the piping is investigated in the order in which the frictional noise detected by the sensor is large, and the position where the trouble occurs is quickly specified. Also, in order to prevent this trouble from occurring, the shape of the pipe will be changed in advance and the piping route will be optimized, and the concrete material will be examined. -Third invention Acoustic emission sensors are attached at positions where plugging of fresh concrete is likely to occur in the route of the pipe through which fresh concrete is pumped.

The frictional noise detected by each acoustic emission sensor is continuously collected at one place,
From these frictional noises, it is judged whether or not the raw concrete material is separated for all sensor mounting positions.
Furthermore, the determination result, the sensor mounting position, and the output waveform are output. For example, piping positions (positions where sensors are installed) are displayed in a list format in the order of increasing friction noise, and the friction noise waveform is graphically displayed on the display for one of the list rows selected by the construction site manager. To do so.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In FIG. 2, a straight pipe 202 is connected to a concrete pump 200.
A vent pipe 204 is connected to 2. The vent pipe 204 is erected adjacent to the outer wall surface of the structure 206 and extends upward along the wall surface by a straight pipe 208.

The straight pipe 208 extends as it is to the height of the roof of the structure 206, and is bent horizontally by the vent pipe 210 with the roof top surface. The bent end of the bent pipe 210 is extended by the straight pipe 212, and the flexible hose 21 is attached to the end of the straight pipe 212.
4 are connected. Raw concrete 216 is a pipe 202,2
The concrete pumps 04, 208, 210, 212, and the inside of the hose 214 are pumped by the concrete pump 200, and are sent to the placement site on the upper part of the building.

The vent pipe 204 and the straight pipes 202, 2
08, connection point, vent pipe 210 and straight pipes 208, 21
2 connection point, straight pipe 212 and flexible hose 21
Acoustic emission sensors (hereinafter referred to as AE sensors) 218, 220, 222, 22
4, 226 are provided respectively. Occlusion troubles are likely to occur at these locations, and each AE sensor 218, 22
Nos. 0, 222, 224, and 226 are attached to the outer wall of the pipe (see FIG. 3), and detect the friction noise between the fresh concrete 216 and the inner wall of the pipe during the internal pressure feeding of the pipe.

FIG. 4 illustrates the system configuration of this embodiment. The AE sensors 218, 220, 222, 22 are shown.
The detection signals of 4,226 are amplifiers 400, 402, 40.
It is amplified at 4,406,408. Further amplifier 40
The amplified output of 0, 402, 404, 406, 408 is AE
The detection signal collecting device 410 is provided.

The AE detection signal collecting device 410 has a friction noise (amplifier 400, 402, 404, 406, 40 detected by each AE sensor 218, 220, 222, 224, 226.
8 amplified outputs) are continuously collected, and are sequentially selected and output at short time intervals. The blockage analyzer 412 (using a computer) determines whether or not the materials (aggregate and mortar) of the ready-mixed concrete 216 are separated by using the frictional noise (sensor detection signal) selectively output from the AE detection signal collector 410. It is determined whether the sensor mounting position is appropriate.

Further, the sensor mounting positions and the judgment results are displayed in the form of a list in the descending order of frictional noises on the display 414, and the frictional sound waveforms of the list row indicated by the given input are graphically displayed on the display 414.
When a blocking trouble occurs, a warning sound is emitted and the corresponding list line is displayed blinking.

Further, each AE sensor 218, 220, 22
The waveform of the fricative noise detected by 2,224,226 is recorded,
The printer 416 prints out according to an instruction given by a construction site manager (operator). The manager of the construction site decides the material to be used for the ready-mixed concrete 216, the ratio thereof, and the pressure feeding route based on the past experience while considering the position of the concrete pouring site, and selects the concrete pump 200 having an appropriate capacity.

The pipes 202, 204, 20 along the determined route
8, 210, 212 and the hose 214 are connected to each other, and there is a high possibility that a blocking trouble will occur (a connection point between the vent pipe 204 and the straight pipes 202, 208, a connection point between the vent pipe 210 and the straight pipes 208, 212). , AE sensor 218 at the connection point between the straight pipe 212 and the flexible hose 214,
220, 222, 224, 226 are attached.

The AE sensors 218, 220, 22
The output signal lines of 2, 224 and 226 are amplifiers 400 and 40.
When connected to the AE detection signal collection device 410 via 2, 404, 406, and 408, the construction site manager uses a criterion for determining whether or not the materials (aggregate and mortar) of the ready-mixed concrete 216 are separated. The occlusion analysis device 412 is taught the waveform level of the sensor detection signal.

The blockage analysis device 412 sorts the sensor mounting positions and the judgment results in descending order of frictional noise and then displays them in a list format on the display 414.
When the pressure feeding of No. 6 is started, the construction site manager examines the contents of the list displayed on the display 414. At that time, if a warning sound is emitted and one of the lines (mostly the first line) is blinking, the construction site manager has actually encountered a blockage trouble at the sensor mounting position shown in this line. It is checked whether or not there is a blockage trouble, and when the mixing ratio of the ready-mixed concrete 216 and the material used are changed, measures such as making the piping route more appropriate are taken.

When the clogging trouble does not actually occur, the same measures as those at the time of the clogging trouble are taken, if necessary, and whether the raw concrete 216 materials (aggregate and mortar) are separated or not. The occlusion analysis device 412 is instructed of the waveform level of the sensor detection signal which is the criterion for determination. If no warning sound is emitted at the start of the pumping of the ready-mixed concrete 216 and no row is blinking, the construction site manager sequentially selects each row from the top side of the list displayed on the display 414. The frictional sound waveform is graphically displayed on the display 414.

FIG. 5 illustrates a screen display in a normal state where the material of the ready-mixed concrete 216 is not separated, and FIG. 6 illustrates a screen display in a separated state. Every time the waveform is displayed graphically, it is predicted whether or not a blocking trouble will occur at the sensor mounting position corresponding to the display at this time. When a blocking trouble is expected to occur, the manager of the construction site changes the mixing ratio of the ready-mixed concrete 216, the material used, and the piping route.

When it is determined that the waveform level of the sensor detection signal, which is a criterion for determining whether or not the raw concrete 216 materials (aggregate and mortar) are separated, a new level is set to the blockage analyzer 412. Teach. When all the contents of the list displayed on the display 414 have been checked, the state at the time of starting the pressure feeding is printed by the printer 416 and recorded on paper, and this is used as a reference material when a blocking trouble occurs.

When changing the waveform level of the sensor detection signal which is a criterion for judging whether the mixing ratio of the ready-mixed concrete 216, the material used, the piping path, and the materials of the ready-mixed concrete 216 (aggregate and mortar) are separated. Also, information regarding these is input to the blockage analysis device 412 and recorded on a sheet for use as a reference material when a blockage trouble occurs.

Thereafter, the occlusion analysis device 412 continues the same processing, and the AE sensors 218, 220, 222, and
The frictional sound waveforms detected by 224 and 226 are recorded on the magnetic disk of its own at regular time intervals. Then, if any of the friction sound waveforms exceeds the taught level during the pumping of the fresh concrete, the blockage analyzer 412 issues a warning.

The manager of the construction site instructs the occlusion analysis device 412 to graphically display the friction sound wave shape of the corresponding sensor mounting position (indicated by the blinking line), and confirms the friction sound wave shape displayed on the display 414. If necessary, appropriate measures such as changing the mixing ratio of ready-mixed concrete 216 and the material used are taken. When a blockage trouble occurs, the position where the blockage trouble may have occurred is checked by referring to the content of the paper in which the state at the time of starting the pressure feeding is checked, and the blinking line in the list displayed on the display 414 is displayed. The position where the blockage trouble occurs is immediately identified by matching with the sensor mounting position shown by.

Furthermore, the ready-mixed concrete 216 that has clogged the troubled pipe is removed, the pipe is replaced with another one (for example, the taper pipe is replaced with a straight pipe), and the pipe path and Mixing ratio of green concrete 216,
The material used is changed, and the pumping of ready-mixed concrete 216 is restarted. Then, before starting the pumping of the ready-mixed concrete 216, the contents previously recorded on the magnetic disk are reproduced on the display 414, and it is preliminarily examined that no trouble will occur at the same position or at another position.

The contents of the magnetic disk are printed and recorded on the paper and used for this examination. The paper will be used as material for examining the piping route, type of piping used, mixing ratio of ready-mixed concrete, materials used, etc. from the next time. As described above, according to the present embodiment, it is possible to prevent the occurrence of the trouble because it is possible to confirm the position where the blocking trouble is likely to occur from the list displayed on the display or the contents on the recording sheet. Even if a blocking trouble occurs, prompt and appropriate measures can be taken against it.

Further, since the frictional sound wave shape of the sensor mounting position is also examined, it is possible to predict the position where the blocking trouble is likely to occur and its timing. Moreover, since the past state of pumping is reproduced on the display and recorded on paper, it is possible to evaluate and examine these and accumulate the experience one by one to determine the types of pipes, pipe routes, and ready-mixed concrete. It is possible to set the compounding ratio, materials used, etc. to the optimum ones from the start of pumping.

[0032]

As described above, according to the present invention, the pumping state of fresh concrete in the pipe route can be grasped in real time, so that the position and time at which the fresh concrete is closed can be predicted and the closing trouble can be avoided. It is possible to effectively prevent the interruption of the placing work.

Even if a blockage trouble occurs, the position where this trouble occurs can be identified immediately, so that the time for interrupting the concrete placing work can be greatly shortened and the work can be resumed early. Become.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is an explanatory diagram of a pressure feeding pipe path.

FIG. 3 is an explanatory view of a mounting position of an AE sensor.

FIG. 4 is an explanatory diagram of a system configuration.

FIG. 5 is an explanatory view (No. 1) of a display screen of a fresh concrete pumping state.

FIG. 6 is an explanatory view (No. 2) of a display screen of a state of pumping ready-mixed concrete.

[Explanation of symbols]

 200 concrete pump 202 straight pipe 204 vent pipe 206 building 208 straight pipe 210 vent pipe 212 straight pipe 214 flexible hose 216 ready-mixed concrete 218, 220, 224, 226 AE sensor 400, 402, 404, 406, 408 amplifier 410 AE detection signal Collection device 412 Blockage analysis device 414 Display 416 Printer

Claims (3)

[Claims] 1. A sound sensor having an inside attached to an outer wall side of a pipe (12) to which fresh concrete (10) is pumped, for detecting a frictional noise between the fresh concrete (10) being pumped and the inner wall of the pipe (12). (14), a concrete material separation judging means (16) for judging whether or not the material of the fresh concrete (10) is separated from the friction sound detected by the sound sensor (14), and a concrete material separation judging means (16). ) The monitoring result output means (18) for outputting the determination result of (1), and a blockage monitoring device for a fresh concrete pressure pipe. 2. An acoustic emission sensor, which is mounted on the outer wall side of a pipe to which fresh concrete is pumped, and detects a frictional noise between the fresh concrete being pumped and the inner wall of the pipe, and a waveform of the friction sound detected by the acoustic emission sensor. A blockage monitoring device for ready-mixed concrete pressure-feeding pipe, comprising: 3. The friction noise between the fresh concrete being pumped and the inner wall of the pipe is detected by being attached to the outer wall of the pipe at a position where plugging of the fresh concrete is likely to occur in the route of the pipe through which the fresh concrete is pumped. A plurality of acoustic emission sensors, a friction sound collection means for continuously collecting the friction sounds detected by each acoustic emission sensor, and a concrete material separation judgment for judging whether or not the raw concrete material is separated from the collected friction sounds Means, and a monitoring result output means for outputting the judgment result of the concrete material separation judging means, the mounting position of the acoustic emission sensor corresponding to the judgment result, and the detection signal of the sensor, the ready-mixed concrete characterized by: Blockage monitoring device for pressure pipes.