JPS5823298B2 - Transportation equipment for ready-mixed concrete, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention transports ready-mixed concrete, etc. from a high place to a low place by using the fall due to its own weight, and then transports it to a place horizontally or diagonally distant from the place where it fell. It relates to equipment and is mainly used to feed ready-mixed concrete, mortar, etc. from above ground to underground construction sites such as tunnels and surge tanks as described below.

Figures 3 and 4 of the drawings show an underground waterway 1 that sends water from the dam to the power plant, and a surge tank 2 that releases water pressure when the flow of water in the underground waterway 1 is stopped.
This surge tank 2 includes a vertical shaft 4 extending from the ground 3 toward the underground waterway 1, an upper cavity 5 that spreads horizontally, a passage 6 that communicates the upper cavity 5 with the underground waterway 1, and a lower cavity that communicates with the lower part of the passage 6. Excavation is performed in the order of No. 7, etc., and ready-mixed concrete is placed on the excavated wall to follow the progress of the excavation.

When performing construction work to pour ready-mixed concrete, etc. onto the inner walls of horizontally expanding cavities underground, such as the above-mentioned upper cavity 5 and lower cavity 7, the ready-mixed concrete, etc. is poured from the ground to the receiver tank installed in the cavity. It must be transported by drop and then transported horizontally or diagonally away from the receiver tank.

The inventor of the present invention previously invented a device suitable for transporting fresh concrete etc. by dropping, and has received a patent for this invention with patent number 909465. When transporting concrete, etc. to a horizontally or diagonally distant location, using a conventional concrete pump requires long piping, making the entire device complex and large-scale, resulting in high equipment costs. (Not only that, many construction sites have narrow spaces where concrete pumps cannot be brought in, making it often impossible to use concrete pumps.

The present invention aims to provide a transportation device for ready-mixed concrete, etc., which can eliminate the above-mentioned disadvantages.

The present invention will be described in detail below with reference to FIGS. 1 and 2. Reference numeral 8 indicates a stock hopper which is placed on the ground and stores fresh concrete from a concrete mixer truck, and 9 is a stock hopper 8. 10 is an upper opening/closing shutter attached to the discharge port 9, 11 is a discharge port provided at the bottom of the
12 is a drive device such as an electromagnetic device, a pneumatic device, or a hydraulic device connected to the upper opening/closing shutter 10, and 12 is a bottom part 13 at an underground construction site such as the upper cavity 5 and lower cavity 7 shown in FIGS. 3 and 4. 14 is a support stand for the receiver tank 12; 15 is an inlet provided in the upper part of the receiver tank 12 at a position opposite to the top side of the bottom part 130; 16 is attached to the inlet 15. Lower opening/closing shutter, 17 is lower opening/closing shutter 1
A driving device such as an electromagnetic device, a pneumatic device, or a hydraulic device is connected to 6, a drop pipe 18 connects the discharge port 9 and the inlet 15, and 19 is a drop pipe connected to the bottom 1 of the receiver tank 12.
30 a discharge port provided at a location leading to the base side; 20 a discharge shutter attached to the discharge port 19; 21 a driving device such as an electromagnetic device, a pneumatic device, or a hydraulic device connected to the discharge shutter 20; 22 a drive device in the receiver tank 12; , bottom 1
30 A dam installed at a location slightly lower than the top, 23
is an operation panel installed on the support stand 14, and each of the drive devices 11 mentioned above
．． 17 and 21, respectively.

24 is a compressed air supply pipe connected to the vicinity of the inlet 15 of the receiver tank 12 via a control valve 25 provided on the operation panel 23, and 26 is another control valve 2 provided on the operation panel 23.
1 is a compressed air supply pipe connected to the vicinity of the outlet 19 of the receiver tank 12; 28 is the inlet 1 of the receiver tank 12;
The pressure regulating valve is connected to the vicinity of 5 by a communication pipe 29, and the communication pipe 29 is opened and closed in conjunction with the opening and closing of the inlet 15 of the receiver tank 12 by the lower opening/closing shutter 16.

Reference numeral 30 denotes an insertion tube inserted into the upper part of the tank 12 from the inlet 15 of the receiver tank 12, and a through hole 31 is bored in the tube wall.

Reference numeral 32 denotes a manhole connected to the receiver tank 12, which is opened when the inside of the tank 12 is cleaned or maintained.

33 is a transport pipeline connected to the discharge port 19, which transports the fresh concrete in the receiver tank 12 to a location separated horizontally or diagonally.

Next, the operation of the apparatus for transporting ready-mixed concrete or the like having the above-mentioned configuration will be described. The upper opening/closing shutter 10 is closed, the lower opening/closing shutter 16 is opened, and the discharge shutter 20 is closed. After sealing the inside of the tank 12, fresh concrete is charged into the stock hopper 8 from a concrete mixer truck and stored.

Next, the upper opening/closing shutter 10 is opened (drived),
Fresh concrete is allowed to flow down into the drop pipe 18.

The ready-mixed concrete falls completely filling the falling pipe 18, and the upper part is filled with the ready-mixed concrete in the stock hopper 8, and since the falling pipe 18 and the receiver tank 12 are airtightly closed, the ready-mixed concrete falls. Accordingly, the air in the drop pipe 18 and the receiver tank 12 is gradually compressed, and when the pressure exceeds the set pressure of the pressure regulating valve 290, the valve 29 opens and the excess air is discharged to the outside of the tank 12, and the lower space is discharged. pressure is kept constant.

Therefore, the falling speed and the load applied to the receiver tank 12 of the ready-mixed concrete are reduced by the air cushion caused by the lower air pressure and the frictional force with the inner wall of the falling pipe 18, and the fresh concrete is in a braked state. The fresh concrete falls into the receiver tank 12 without being separated into sand, cement milk, etc., and without escaping the amount of air contained in the fresh concrete to increase concrete strength.

The fresh concrete that has reached the receiver tank 12 is once dammed above the bottom 13 by the dam 22, increases in volume while being stirred by the fresh concrete falling one after another, and finally overflows the dam 22. It falls down the inclined bottom 13 and gradually accumulates on the base side of the bottom 130.

The agitation and overflow at the dam 22 continue until the accumulated amount reaches the same level as the upper end of the dam 22, and once the above level is exceeded, the whole of the receiver tank 12 is mixed with the already fallen ready-mixed concrete and the The falling fresh concrete is mixed with the fresh concrete, and the entire amount of the fresh concrete finishes falling, leaving some space 34 on the side of the inlet 15 in the receiver tank 12.

At that time, if the pressure in the space 34 exceeds the set pressure of the pressure regulating valve 290, the valve 29 opens and excess air is discharged, and if the pressure is lower than the set pressure, the pressure is It enters the insertion tube 30 through the hole 31 and exits upward through the drop pipe 18.

When the pressure in the space 34 is released, the upper opening/closing shutter 10 is driven to close, and the lower opening/closing shutter 16 is also driven to close the inlet 15 and the communication pipe 29 in conjunction with each other, so that the inside of the receiver tank 12 is closed. keep it in a sealed state.

In this state, the discharge shutter 20 is driven to open, and at the same time, the control valve 25 is operated to open the compressed air supply pipe 2.
4, compressed air at a predetermined pressure is sent into the space 34, and further, by operating the control valve 27, compressed air is sent as replenishment pressure from the compressed air supply pipe 26 to the discharge port 19, and a predetermined amount of ready-mixed concrete is poured into the pipe. Pump through line 33.

After the pressure feeding is completed, the discharge shutter 20 is closed and the lower opening/closing shutter 16 is driven to open in preparation for the next transportation.

By repeating the above operations, raw concrete is produced.

The REET is transported to various locations such as an underground construction site, such as a tunnel or the above-mentioned surge tank.

In addition, after the fresh concrete is pumped from the receiver tank 12, the fresh concrete IJ- remaining inside the dam 22
1-35 solidifies with the top surface concave as shown in the second figure, and produces stirring and overflow effects on the fresh concrete falling through the falling pipe 18, and reduces impact, wear, etc. on the bottom part 13. have the effect of

Dimensions, arrangement, and pressure of each part of the device shown in the above example.

The force set etc. can be changed as appropriate depending on the construction site.

Further, in the above embodiment, an example was explained in which fresh concrete is transported, but the present invention is not limited to this, and can be applied to any slurry-like material such as mortar.

The device of the present invention has the above-described structure and function, and can perform two functions by opening and closing the opening/closing shutter. Because it can be used underground, it can also be expanded horizontally.

It is possible to efficiently transport ready-mixed concrete to various construction sites, shortening the construction period and saving labor.

In addition, since a concrete pump is no longer required, the entire device becomes simpler, and with the simple operation of opening and closing the opening/closing shutter, ready-mixed concrete can be efficiently transported to construction sites where concrete pumps and humans cannot be transported. It is possible to save equipment costs.

Moreover, the fresh concrete falls while the falling speed and the load on the receiver tank are reduced by the air cushion and the frictional force with the inner wall of the falling pipe during falling transport, so that the components such as aggregate, sand, cement milk, etc. The ready-mixed concrete reaches the receiver tank without being separated, and with almost no air content being removed, and in the same tank, the ready-mixed concrete is stirred by the kinetic energy of the fall, so it is possible to keep good-quality ready-mixed concrete for a long time. Can be transported over long distances.

In addition, the hardened fresh concrete remaining in the dam installed in the receiver tank acts as a dead stock for the fresh concrete falling through the falling pipe.
Impacts, wear, etc. on the bottom of the receiver tank are reduced, and the thickness of the bottom of the receiver tank can be reduced, resulting in various effects such as the ability to make the receiver tank smaller and lighter.

[Brief explanation of drawings]

FIG. 1 is a side view showing an example of a transportation device for ready-mixed concrete, etc. according to the present invention, FIG. 2 is an enlarged sectional view of the main parts of the device,
FIG. 3 is a sectional view showing an example of an underground construction site, and FIG. 4 is a sectional view taken in a direction perpendicular to the cross section of FIG. 3. 8°゛°゛°° Stock hopper, 9... Discharge port, iol. ...Top opening/closing shutter, 11...Drive device, 12...Receiver tank, 13...
Slanted bottom, 14-...Support stand, 15...
Entrance, 16...-Lower opening/closing shutter, 17...
... Drive device, 18 ... Fall pipe, 19
...Discharge port, 20...Discharge shutter, 21...-1 drive device, 22...Weir section, 23...Operation panel , 24... - compressed air supply pipe, 25... control valve, 26...
...Compressed air supply pipe, 27-...Control valve, 2
B-1--Pressure adjustment box, 29...Communication pipe,
30...Insertion tube, 31...Through hole, 32
...-manhole, 33...transportation pipeline.

Claims (1)

[Claims] 1 A discharge port equipped with an opening/closing shutter is provided at the lower part of the stock hopper which is placed above and is used to charge and store fresh concrete, etc., and the above-mentioned inclined An inlet equipped with an opening/closing shutter is provided at a location opposite to the top side of the bottom, the discharge port of the stock hopper and the inlet of the receiver tank are connected by a drop pipe, and the base of the inclined bottom is provided at the bottom of the receiver tank. A discharge port equipped with a discharge shutter is provided at a location leading to the side, and a dam is provided at a location slightly lower than the top of the sloping bottom of the receiver tank, so that the inlet side and the discharge port side of the receiver tank are connected to each other. An apparatus for transporting ready-mixed concrete, etc., characterized in that a compressed air supply pipe is connected to each of the receiver tanks, and a pressure regulating valve is provided near the entrance of the receiver tank.