JP3364842B2 - Mud solidification equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mud solidifying apparatus suitable for solidifying mud containing a large amount of water such as construction sludge, dredged soil and sludge.

[0002]

2. Description of the Related Art Up to now, mud containing a large amount of water, for example, a high-moisture content mud, has been transported to an industrial waste disposal site by a closed dump truck and discarded, but the capacity of the disposal site is limited. In view of the fact that it is difficult to secure a new site for the treatment plant, and the efficient use of materials by reusing mud, in recent years, cement-based solidifying materials have been mixed with mud. Increasingly, solidification, improvement, and the use of the improved soil for embankment at other sites such as road construction and residential land development work.

When the solidifying material is mixed and solidified in the mud, for example, the mud is put into a hopper, the mud is dropped from a hopper to a feeder, the dropped mud is supplied to a mixer with a feeder, and the solidifying material is added to the mud with a mixer. It is possible to mix them.

[0004]

At this time, in order to prevent the solidification unevenness of the mud, it is desirable that the amount of the mud supplied from the hopper to the mixer through the feeder is constant, but the mud is fed to the hopper. If there is a difference in the amount of mud or the amount of water contained in it, the weight of the mud itself in the hopper, that is, the mud pressure, may change, and even if the operation amount of the feeder is constant, the mud may not be supplied in a fixed amount to the mixer. There is. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mud solidifying device capable of maintaining a constant supply amount of mud supplied to a mixing portion with a solidifying material. .

[0005]

In order to achieve the above object, the present invention provides a mixing means for mixing mud and a solidifying material, a mud charging section into which the mud is charged, and a mud charging section below the mud charging section. In a mud solidifying device provided with a mud transfer means for transferring the mud dropped from the mud input part to the mixing means, a measuring means for measuring the earth pressure of the mud in the mud input part, and Calculating means for calculating the amount of mud falling from the mud feeding section to the mud transferring means based on the change over time of the measurement result of the measuring means, and controlling the driving of the mud transferring means based on the calculation result of the calculating means A control means is provided.

Further, in the present invention, the mud transfer means rotationally drives the cylindrical body, a rotary shaft arranged in the cylindrical body, a feed blade attached to the rotary shaft, and the rotary shaft. And a motor, and the control means controls the rotation speed of the motor.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a mud solidifying device according to an embodiment of the present invention, and FIGS. 2 to 4 are a front view, a rear view, and a plan view. As shown in these drawings, the mud solidification device 1 of the present embodiment includes a frame 3, a mud supply unit 5, a foreign matter removal unit 7, a solidification material supply unit 9, a pre-solidification material supply unit 11, a mixing unit 13, and a control unit. The unit 15 is provided. Then, as shown in FIG. 5, the mud-solidifying device 1 is brought to the site of shield construction, excavation work, etc. by a truck 19 of a 4t vehicle class when it is used, and is unloaded from the loading platform 1901 and installed on the ground of the site.

The frame 3 includes a base 301, a vertical frame 303,
It is composed of an upper frame 305, a monitoring stand 307, a safety fence 309, and a vertical ladder 311. As shown in FIG. 5, the base 301 is located on the loading platform 1901 when the mud-solidifying device 1 is loaded on the truck 19. The vertical frame 303 is shown in FIGS.
As shown in FIG. 3, the base 301 is erected upward from the four corners, and the upper frame 305 is formed in a rectangular shape and is attached to the upper end of the vertical frame 303 in parallel with the base 301.

The monitoring platform 307 is raised when an operator (not shown) monitors the operating states of the solidified material supply unit 9 and the preliminary solidified material supply unit 11, and as shown in FIG. It is formed with half the size. The safety fence 309 is provided to prevent workers from falling on the monitoring stand 307. As shown in FIGS. 1, 3 and 4, the safety fence 309 surrounds the monitoring stand 307 on the upper part of the upper frame 305. It is installed upright.
The vertical ladder 311 is provided for raising and lowering to the monitoring stand 305, and is attached to the base 301 and the upper frame 305 of the frame 3 as shown in FIGS. 1, 3 and 4.

When the mud solidifying device 1 is unloaded from the loading platform 1901 of the truck 19 and installed on the ground at the site,
As shown in FIGS. 1 and 2, the outriggers 313 provided with the jacks 315 are attached by being inserted into the insertion ports 317 (FIG. 5) formed on the side portions of the four corners of the base 301.

The mud supply unit 5 is provided with a mud hopper 501, a screw feeder 505, four load cells 507, and a vibration generator 509. The mud hopper 501 (corresponding to the mud charging section) is used for charging mud (not shown) generated during excavation work such as shield work and excavation work, and as shown in FIGS. It has a rectangular opening 503, and its four corners are suspended and supported by the upper frame 305 of the frame 3. As shown in FIG. 1, a pressure sensor 511 (corresponding to measuring means) is provided in the mud hopper 501, and the mud hopper 50 is provided by the pressure sensor 511.
The earth pressure of mud in 1 is measured.

The screw feeder 505 (corresponding to a mud transfer means) transfers the mud in the mud hopper 501 to the mixing section 13 and is arranged below the mud hopper 501 and is constructed integrally with the mud hopper 501. There is. As shown in FIG. 1, the screw feeder 505 has a cylindrical body 513.
And a rotary shaft 515 arranged in the cylindrical body 513 along the longitudinal direction, and a feed blade 5 attached to the peripheral surface of the rotary shaft 515.
It is composed of 17 and. The rotating shaft 515 is connected to the motor 521 via a chain sprocket mechanism 519 provided at one end of the cylindrical body 513 as shown in FIG. 2, and the rotating shaft 515 is rotated by driving the motor 521. The mud that has dropped from the mud hopper 501 to the screw feeder 505 is transferred to the cylindrical body 5 by the feed blade 517.
It is transferred to the other end side in 13 and is supplied to the mixing section 13 from a discharge port 523 provided in the lower portion of the peripheral surface on the other end side of the cylindrical body 513 as shown in FIG.

The four load cells 507 are the mud hopper 5
01 and the screw feeder 505 are combined to measure the weight. As shown in FIG. 1 and FIG.
It is provided at each hanging support point at the four corners of 1. The vibrator 509 vibrates the mud hopper 501 in order to prevent the mud from clogging in the mud hopper 501, and is attached to a side portion of the mud hopper 501 as shown in FIGS. 1 and 2. It is driven by the air compressor 17 installed on the base 301 of the frame 3.

The foreign matter removing section 7 is composed of a sieve net 701, an air jack 705, and a chute 707.
The sieving net 701 removes foreign matter (for example, wood chips, iron scraps, reinforcing bars, etc.) from the mud thrown into the mud hopper 501, and as shown in FIGS. 1 and 2, hinges to open and close the opening 503 of the mud hopper 501. It is attached to the upper frame 305 of the frame 3 via 703.

The air jack 705 swings the sieving net 701 around the hinge 703, and is shown in FIGS.
As shown in FIG. 3, the air compressor 1 is provided on the upper frame 305 of the frame 3 and is connected via the opening / closing valve 709 (FIG. 6).
It is driven by the air supplied from 7. Shoot 70
Reference numeral 7 is for discharging the foreign matter in the mud, which has been sieved by the sieving net 701, to the ground. As shown in FIG.
It is attached to the vertical frame 303 of the frame 3 close to 3. The chute 707 is formed in a hollow shape, and an input port 711 is provided at an upper part thereof and a discharge port 713 is provided at a lower end thereof.

The solidifying material supply section 9 includes a charging section 901, a screw feeder 905, a transfer pipe 907, a solidifying material hopper 909, a load cell 911, and a screw feeder 9.
Equipped with 13. The charging unit 901 is for charging a cement-based solidifying material for solidifying mud, and is provided at the height of the base 301 of the frame 3 as shown in FIG. 3, and the solidifying material input port 903 is provided on the upper portion thereof. Has been.

The screw feeder 905 has an input port 90.
3 is to transfer the solidified material charged into the charging section 901 to a position higher than the upper frame 305 of the frame 3, and is provided along the vertical frame 303 of the frame 3 near the charging section 901 as shown in FIG. There is. This screw feeder 905
Is composed of a cylindrical body 915, a rotating shaft 917 arranged in the cylindrical body 915 along the longitudinal direction, and a feed blade 919 attached to the peripheral surface of the rotating shaft 917.
Rotates by driving a motor 921 attached to the upper end of the screw feeder 905.

As shown in FIG. 3, the transfer pipe 907 connects the upper end of the screw feeder 905 and the upper part of the solidifying material hopper 909. The solidifying material hopper 909 stores the solidifying material transferred from the charging unit 901 through the screw feeder 905 and the transfer pipe 907, and the upper end of the solidifying material hopper 909 is, as shown in FIG.
It is suspended and supported by 05. The solidifying material hopper 90
As shown in FIG. 3, a connection port 923 is provided in the lower part of the port 9, and the air compressor 17 is connected through an air supply tube (not shown). Air compressor 17
Air from the solidification material hopper 909 passes through the connection port 923.
Aeration is performed so that the solidified material in the solidified material hopper 909 is jetted into the interior of the container to prevent arching.

The load cell 911 is a solidifying material hopper 909.
Of the solidified material hopper 909, as shown in FIG. The screw feeder 913 transfers the solidified material in the solidified material hopper 909 to the mixing section 13, and as shown in FIG. 1, a cylindrical body 925 and a rotary shaft arranged in the cylindrical body 925 along the longitudinal direction. 927, and a feed blade 929 attached to the peripheral surface of the rotating shaft 927. The rotating shaft 927 is shown in FIG.
And, as shown in FIG. 3, it is connected to a motor 933 via a chain sprocket mechanism 931 provided at one end of a cylindrical body 925, and the rotation of a rotary shaft 927 by the drive of this motor 933 causes the solidifying material hopper 909 to move. The solidified material supplied from the screw feeder 913 to the screw feeder 913 is transferred to the other end side in the cylindrical body 925 by the feed blade 929, and the discharge tube 935 connected to the other end side of the cylindrical body 925 is connected as shown in FIG. It is supplied to the mixing unit 13 via the.

The pre-solidifying material supplying section 11 is provided in the charging section 110.
1, a transfer pipe 1105, a blower 1107, a pre-solidifying material hopper 1109, a load cell 1111 and a screw feeder 1113. The charging section 1101 is for charging a preliminary solidifying material different from the solidifying material supplied from the solidifying material supply section 9 to the mixing section 13, and as shown in FIGS. 3 and 4, the vertical ladder 311 of the frame 3 is provided. Side base 301
It is provided at almost the same height as the above, and a pre-solidified material charging port 1103 is provided above it. As shown in FIG. 3, the transfer pipe 1105 connects the lower end of the charging unit 1101 and the upper part of the pre-solidified material hopper 1109.

The blower 1107 is for feeding the preliminary solidifying material fed from the feeding port 1103 to the feeding portion 1101 to the preliminary solidifying material hopper 1109 via the transfer pipe 1105. As shown in FIGS. Solidifying material hopper 1
It is attached to 109. Pre-solidifying material hopper 1109
Stores the preliminary solidified material transferred from the charging unit 1101 via the transfer pipe 1105, and has its upper end suspended and supported by the upper frame 305 of the frame 3 as shown in FIG. It should be noted that, like the solidifying material hopper 909, the air compressor 17 is provided below the pre-solidifying material hopper 1109.
Air for aeration from the pre-solidifying material hopper 11
A connection port 1115 (FIG. 3) that leads to the inside of 09 is provided.

The load cell 1111 is for measuring the weight of the pre-solidified material hopper 1109, and is provided at a suspending and supporting position of the pre-solidified material hopper 1109 as shown in FIG. The screw feeder 1113 transfers the preliminarily solidified material in the preliminarily solidified material hopper 1109 to the mixing section 13. The screw feeder 1113 is configured similarly to the screw feeder 913 of the solidified material supply section 9, and as shown in FIG. 1117, a rotating shaft 1119, and a feed blade 1121.

As shown in FIG. 3, the rotary shaft 1119 is connected to a motor 1125 via a chain sprocket mechanism 1123 provided at one end of a screw feeder 1113, and the rotary shaft 1 is driven by the motor 1125.
By rotating 119, the preliminary solidifying material supplied from the preliminary solidifying material hopper 1109 to the screw feeder 1113 is transferred to the other end side inside the cylinder 1117 by the feed blade 1121, and as shown in FIG. It is supplied to the mixing unit 13 via a discharge tube 1127 connected to the other end side of 1117.

The mixing section 13 includes a mixer 1301 and a support base 1.
303 and a belt conveyor 1305. The mixer 1301 (corresponding to a mixing unit) mixes the mud from the mud supply unit 5 with the solidifying material from the solidifying material supply unit 9 or the preliminary solidifying material from the preliminary solidifying material supply unit 11, and is the present embodiment. A two-axis paddle type is used in. As shown in FIGS. 1 and 2, this mixer 1301 has a cylindrical body 1307.
Two rotary shafts 1309 arranged in the cylindrical body 1307 along the longitudinal direction, spiral feed blades 1311 attached to the peripheral surface of each rotary shaft 1309 near one end, and each rotary shaft 1309. A plurality of paddles 1 provided on the peripheral surface of the 1309 near the other end
313 and 313.

As shown in FIG. 1, the discharge port 523 of the screw feeder 505 of the mud supply unit 5 is connected to the peripheral surface on one end side of the cylindrical body 1307, and the center of the cylindrical body 1307 is slightly more than one end side. On the peripheral surface of the cylindrical body 1307, which faces the rotating shaft 1309 on which the paddle 1313 is projected,
A discharge tube 93 connected to the screw feeders 913 and 1113 of the solidification material supply unit 9 and the preliminary solidification material supply unit 11.
5, 1127 are connected, respectively
Communicates with the interior of the.

The rotary shaft 1309 is connected to a motor 1317 via a chain sprocket mechanism 1315 provided at one end of a cylindrical body 1307 as shown in FIG. 1, and the drive of the motor 1317 causes the rotary shaft 1309 to rotate. As a result, the mud supplied from the mud hopper 501 to the mixer 1301 is transferred to the other end side in the cylindrical body 1307 by the feed blade 1311 and the discharge tubes 935, 1
Reach 127 cylinders 1307 to which 127 is connected.

Then, here, the solidifying material and the preliminary solidifying material are supplied from the solidifying material supply unit 9 and the preliminary solidifying material supply unit 11,
While the solidifying material and the preliminary solidifying material are mixed with the mud by the paddle 1313 that rotates together with the rotating shaft 1309, the feeding blade 1
The mud mixed with the solidifying material and the preliminary solidifying material by the feeding force of the mud by 311 is further transferred to the other end side in the cylindrical body 1307, and as shown in FIG. 1, the peripheral surface on the other end side of the cylindrical body 1307. It is discharged to the belt conveyor 1305 from the discharge port 1319 provided at the lower part.

The support base 1303 supports the mixer 1301 so as to be tiltable, and as shown in FIG. 1, the lower part on one end side thereof is connected to the base 301 of the frame 3 via a hinge 1321.
It is rotatably connected to the upper side, and on both sides of the other end side, as shown in FIG.
And the hanging chains 132 as shown in FIG.
The hook 1325 at the lower end of No. 3 is hooked. As shown in FIG. 3, a hook 1327 and a winch 1329 are provided on the upper end of each hanging chain 1323,
The hook 1327 is hooked on a hooking piece 319 connected to the vertical frame 303 and the upper frame 305 of the frame 3 as shown in FIG. Therefore, by changing the length of the hanging chain 1323 by winding and unwinding the winch 1329, the supporting base 1303 to the mixer 1301 can be changed.
Is tilted at an arbitrary angle.

The belt conveyor 1305 is a mixer 130.
The mud mixed with the solidifying material or the preliminary solidifying material in 1 is transferred to a bed or the like of a dump truck for transporting earth and sand (not shown), and one end of the mud is a discharge port 1319 of the mixer 1301 as shown in FIG. Base 30 of frame 3 so as to face downward
It is attached to 1.

The control unit 15 controls the entire mud solidifying apparatus 1, and as shown in FIG.
1 is provided on a side of the mud supply unit 5 and has an operation surface 1501 exposed to the outside of the mud solidification apparatus 1. A schematic configuration of the control unit 15 will be described based on the block diagram of FIG. As shown in FIG. 6, the controller 15 includes a main controller 1503, a memory 1505, and an operation controller 150.
7, motor drive circuit 1509, valve drive circuit 1511, blower drive circuit 1513, solidifying material selection switch 1515,
Foreign matter removal operation switch 1517, solidified material injection switch 1
519, preliminary solidifying material feeding switch 1521, mud supply amount setting switch 1523, solidifying material supply amount setting switch 15
25 and a preliminary solidifying material supply amount setting switch 1527.

The main controller 1503 (corresponding to a calculating means) includes a load cell 507 and a pressure sensor 5 of the mud supply unit 5.
11, load cells 911 and 1111 of the solidification material supply unit 9 and the preliminary solidification material supply unit 11, and a solidification material selection switch 151.
5, a foreign matter removing operation switch 1517, a solidified material input switch 1519, and a preliminary solidified material input switch 1521 are connected. The memory 1505 stores a table indicating the operation amount of the screw feeder 505 according to the earth pressure in the mud hopper 501 of the mud supply unit 5.

Operation control device 1507 (corresponding to control means)
Is for controlling the operations of the mud supplying unit 5, the foreign matter removing unit 7, the solidifying material supplying unit 9, the pre-solidifying material supplying unit 11, and the mixing unit 13. The motor drive circuit 1509 controls the mud supplying unit 5, solidifying Each screw feeder 505, 905, 913, 1113 of the material supply unit 9 and the pre-solidified material supply unit 11
And the motor 5 provided in the mixer 1301 of the mixing unit 13.
21, 921, 933, 1125, 1317 are operated.

Further, the valve drive circuit 1511 is used for the foreign matter removing unit 7
The open / close valve 709 between the air jack 705 and the compressor 17 is operated, and the blower drive circuit 1513 is used for the blower 1107 of the pre-solidifying material supply unit 11.
To operate. Solidifying material selection switch 1515
Is to mix the solidifying material from the solidifying material supply unit 9 into the mud,
Alternatively, whether to mix the pre-solidified material from the pre-solidified material supply unit 11 with the mud is selectively designated. The foreign matter removing operation switch 1517 is operated when discarding the foreign matter in the mud that has been sieved by the foreign matter removing unit 7 and remains on the sieving net 701. The solidifying material feeding switch 1519 and the preliminary solidifying material feeding switch 1521 are used to supply the solidifying material. When the solidified material charged into the charging section 901 of the section 9 is transferred to the solidified material hopper 909 by the screw feeder 905, or the preliminary solidified material charged into the charging section 1101 of the preliminary solidified material supply section 11 is blown by the blower 1107. Each of them is operated when being sent to 1109.

The mud supply amount setting switch 1523, the solidification material supply amount setting switch 1525, and the pre-solidification material supply amount setting switch 1527 are used to add the solidification material and the preliminary solidification material to the mud previously determined according to the property of the mud. Depending on the rate, the amount of mud, solidifying material and spare solidifying material supplied per unit time from the mud supplying section 5, the solidifying material supplying section 9 and the preliminary solidifying material supplying section 11 to the mixing section 13 is set. To do.

Next, the case of using the mud solidifying device 1 of the present embodiment having the above-mentioned structure will be described. Before carrying out the solidification work of the mud, the charging section 9 of the solidifying material supply section 9 may be used as necessary.
01 or a charging agent 1101 of the preliminary hardening material supply unit 11 is charged with a hardening agent or a preliminary hardening agent, and a hardening agent charging switch 1519 or a preliminary hardening agent charging switch 1521 of the operation unit 15 is operated. Then, the solidification material supply unit 9 and the preliminary solidification material supply unit 11
Solidifying material hopper 909 detected by main controller 1503 based on the weight measured by load cells 911 and 1111 of
Based on the weight of the solidified material in the solidified material and the preliminary solidified material in the preliminary solidified material hopper 1109, the main controller 1503 determines the transfer amount of the solidified material and the preliminary solidified material to the solidified material hopper 909 and the preliminary solidified material hopper 1109. It is calculated.

Data of the calculated transfer amount is transferred to the operation control device 1507, and the operation control device 1507 transfers the solidified material and the preliminary solidified material to the solidified material hopper 909 and the preliminary solidified material hopper 1109 by the transferred amount. To control the motor drive circuit 1509 and the blower drive circuit 1513 so that
The motor 921 provided in the screw feeder 905 of the solidification material supply unit 9 and the blower 110 of the preliminary solidification material supply unit 11
7 is driven. This allows the screw feeder 90
At 5, the solidified material is transferred from the charging unit 901 to the solidified material hopper 909 by a predetermined amount, or by the blower 1107, the preliminary solidified material is transferred to the charging unit at a predetermined amount.

The solidifying material supply unit 9 and the preliminary solidifying material supply unit 1
The transfer of the solidifying material or the preliminary solidifying material from the charging section 901, 1101 of 1 to the solidifying material hopper 909 or the preliminary solidifying material hopper 1109 is performed by the solidifying material supply unit 9 or the preliminary solidifying material supply unit 11.
The load cells 911, 11 of the solidification material supply unit 9 and the preliminary solidification material supply unit 11
Based on the change in weight measured by 1111, the main controller 15
Alternatively, the operation may be performed by omitting the operation of the solidified material input switch 1519 or the preliminary solidified material input switch 1521. Further, instead of automatically determining the transfer amount of the solidified material or the pre-solidified material as described above and transferring only the amount, the solidified material or the pre-solidified material is appropriately transferred by the manual operation of the worker as necessary. You may do it. further,
The above-described work of adding the solidifying material and the preliminary solidifying material may be performed during the solidifying operation of the mud.

When the solidified material and the preliminary solidified material are stored in the solidified material hopper 909 and the preliminary solidified material hopper 1109 to some extent, the start of the operation is instructed by operating a start key (not shown) of the operation unit 15. At that time, the operation unit 15
The solidifying material selection switch 1515 is used to set which of the solidifying material and the preliminary solidifying material is mixed with the mud. In addition, a mud supply amount setting switch 1523, a solidification material supply amount setting switch 1525, and a preliminary solidification material supply amount setting switch 1527 of the operation unit 15 correspond to the addition rate of the solidification material or the preliminary solidification material according to the property of the mud. Set the amount of mud, solidifying material, and spare solidifying material supplied per unit time. In order to facilitate the following description, it is assumed here that the solidifying material selection switch 1515 is set to mix the solidifying material from the solidifying material supply unit 9 with the mud.

When starting the solidification work of mud,
The sieving net 701 of the foreign matter removing unit 7 is closed to close the mud hopper 50.
In a state where the first opening 503 is covered, the mud is loaded into the mud hopper 501 by a belt conveyor, a back hoe (neither is shown), or the like. At this time, foreign materials such as wood chips, iron scraps, and reinforcing bars mixed in the mud are sieved by the sieving net 701 and remain on the sieving net 701.

When some foreign matter has accumulated on the sieving net 701 to some extent, the foreign matter removing operation switch 1519 of the operating portion 15 is operated, and the valve driving circuit 1511 operates between the air jack 705 of the foreign matter removing portion 7 and the compressor 17. An on-off valve (not shown) is opened, and air from the compressor 17 is supplied to the air jack 705. When the air from the compressor 17 is supplied to the air jack 705, the rod of the air jack 705 extends and the sieving net 701 swings around the hinge 703 to open the sieving net 701. When the sieving net 701 is opened, the foreign matter accumulated on the sieving net 701 slides down and is thrown into the chute 707 from the chute 707's charging port 711, is discharged through the chute 707 to the ground from the discharging port 713, and is discarded. It

When the mud soil from which the foreign matter has been removed by the foreign matter removing section 7 is put into the mud hopper 501 of the mud supplying section 5, the vibration of the mud hopper 501 by the seismic generator 509 causes the mud hopper 5 to move.
The mud in 01 is prevented from being clogged, and the mud is securely fed from the mud hopper 501 by the screw feeder 505.
Is dropped and supplied. From the mud hopper 501 to the cylinder 513
The mud dropped and supplied inside the screw feeder 50
5 is transferred in the cylindrical body 513 by the feeding blade 517 of
It is supplied from the outlet 523 to the mixer 1301 of the mixing unit 13.

At this time, the earth pressure in the mud hopper 501 is measured by the pressure sensor 511, and the result is measured by the operation unit 15.
Is transferred to the main controller 1503. Main controller 150
3 retrieves the table stored in the memory 1505 based on the amount of mud supply per unit time set by the mud supply amount setting switch 1523 and the earth pressure in the mud hopper 501 to search the table in the mud hopper 501. The operation amount of the screw feeder 505 corresponding to the earth pressure is called and the operation amount is transferred to the operation control device 1507. Operation control device 1507
The screw feeder 50 according to the transferred operation amount.
The number of rotations of the motor 521 of No. 5 is calculated, and the motor drive circuit 1509 is controlled so that the motor 521 is rotated at the number of rotations.

By this control, when the soil pressure in the mud hopper 501 is low and the mud soil cannot be supplied to the mixing section 13 by a sufficient amount of mud by dropping due to its own weight, the rotary shafts 515 to 515 of the screw feeder 505 to The rotation speed of the feed blade 517 is increased, and conversely, when the soil pressure in the mud hopper 501 is high, the rotation speeds of the rotation shaft 515 to the feed blade 517 are decreased, and the mud supplied to the mixer 1301 is always It is made to be a fixed amount.

In the main controller 1503 of the control unit 15, the amount of mud supplied from the mud supply unit 5 to the mixing unit 13 is determined based on the change over time in the weight measured by the load cell 507 of the mud supply unit 5. To be detected. And the main controller 15
In 03, based on the detected mud supply amount and the mud supply amount per unit time previously set by the mud supply amount setting switch 1523, the mud supply amount from the mud supply unit 5 to the mixing unit 13 The mud supply increase / decrease amount from the mud supply unit 5 to the mixing unit 13 is calculated so that the value becomes the value set by the mud supply amount setting switch 1523, and the calculated increase / decrease amount is transferred to the operation control device 1507. It

The operation control device 1507 calculates the increase / decrease amount of the rotation speed of the motor 521 of the screw feeder 505 according to the transferred increase / decrease amount, and only the increase / decrease amount of the motor 521.
A feedback control unit that controls the motor drive circuit 1509 so that the number of rotations is increased or decreased. By this control, the supply amount of the mud from the mud supply unit 5 to the mixing unit 13 per unit time is more reliably kept constant at all times.

The rotary shaft 5 of the screw feeder 505
A universal joint is provided in the middle of 15, and a cylindrical body 513 near the universal joint is formed by a bellows so that the other end side portion of the cylindrical body 513 can be flipped upward in FIG. It is also possible to do so. Then, the screw feeder 505 is configured as described above, and the cylindrical body 513 is
If the position of the discharge port 523 of the mud can be set higher than the upper surface of the mud of the mud hopper 501, when the mud having high fluidity and having high fluidity is fed into the mud hopper 501, the mud of the screw feeder 505 will be discharged. This is advantageous in preventing the liquid from flowing out of the discharge port 523 of the cylindrical body 513 regardless of the operation.

The screw feeder 505 of the mud supply unit 5
The mud supplied from the mixer 1301 of the mixing unit 13 is
The cylindrical body 1307 is formed by the feed blade 1311 of the mixer 1301.
The discharge tube 93 of the solidified material supplying section 9 is transferred to the inside.
5 reaches the cylindrical body 1307 of the mixer 1301 to which 5 is connected.

On the other hand, in parallel with the supply of the mud from the mud supply section 5 to the mixing section 13, in the solidification material supply section 9, the solidification material in the solidification material hopper 909 is fed from the connection port 923 at the bottom of the solidification material hopper 909. The screw feeder 91 prevents the generation of arching by the jetted aeration air.
3 is supplied. The solidified material supplied from the solidified material hopper 909 into the cylindrical body 925 is transferred inside the cylindrical body 925 by the feed blade 929 of the screw feeder 913, and is supplied to the mixer 1301 of the mixing unit 13 via the discharge tube 935. It

The solidifying material supplied to the mixer 1301 is discharged from the discharge port 523 of the screw feeder 505 of the mud supply unit 5.
Via the discharge tube 935 of the screw feeder 913, which is connected to the tubular body 1307 location on the downstream side of the tubular body 1307 location of the mixer 1301 connected to the.
It is thrown in in 07.

Then, the rotary shaft 130 at the place where the solidifying material is introduced.
With the paddle 1313 protruding from the 9th part, the feed blade 131
The mud transferred in the cylindrical body 1307 by 1 and the solidifying material are mixed, and the mud after the solidifying material is mixed is sent to the discharge port 1319 by the feeding force of the mud by the feed blade 1311, and the discharging opening 13
It is discharged from 19 to the belt conveyor 1305. The improved mud mixed with the solidifying material is transferred to a loading platform of a dump truck for transporting earth and sand by a belt conveyor 1305, and is transported to a work site such as embankment by the dump truck.

When soft mud having a high water content is solidified, the winch 1329 of the mixing section 13 winds the suspension chain 1323 to shorten its length, and the hinge 1301 is used as the center to support the support base 1303. It is rotated counterclockwise to tilt the mixer 1301 to move the discharge port 1319 upward. As a result, the residence time of the mud and the solidifying material mixed therewith in the mixer 1301 becomes long, and the sufficiently solidified mud is discharged from the discharge port 1319 to the belt conveyor 1305, and the solidification is insufficient. Thus, the mud remaining soft is prevented from flowing out of the discharge port 1319 by the momentum of the transfer from the mud supply unit 5 to the mixing unit 13. Although not described in this embodiment, the operation when the solidifying material selection switch 1515 is set to mix the preliminary solidifying material from the preliminary solidifying material supply unit 11 with the mud is also shown in the embodiment. The operation is the same as when the solidifying material is mixed with the mud.

As described above, according to the mud solidifying device 1 of the present embodiment, when the mud is transferred from the mud hopper 501 into which the mud is fed to the mixer 1301 via the screw feeder 505 arranged below the mud hopper 501. Mud hopper 50
The earth pressure of the mud in 1 is measured by the pressure sensor 511, and the amount of the mud falling from the mud supply unit 5 to the screw feeder 505 is measured by the main controller 1 based on the change over time of the measurement result.
503, and the operation control device 1 based on the calculated value.
507 controls the driving of the screw feeder 505.

For this reason, the transfer capacity of the screw feeder 505 can be changed according to the amount of mud dropped onto the screw feeder 505, which fluctuates due to the earth pressure of the mud in the mud hopper 501. For example, in the mud hopper 501, When the earth pressure of the mud is low and the amount of the mud falling to the screw feeder 505 is small, the transfer capacity of the screw feeder 505 can be increased and the amount of the mud supplied from the screw feeder 505 to the mixing unit 13 can be kept constant.

In the present embodiment, the case where the mud transfer means is constituted by the screw feeder 505 has been described. However, a plurality of buckets are attached to the belt that circulates between the mud hopper 501 and the mixer 1301 to form the mud transfer means. You may comprise. Although the pressure sensor 511 is used as the measuring means in the present embodiment, the load cell 507 may be used as long as it can output a signal according to the heavily measured earth pressure.
Other than this may be used as the measuring means.

Further, in the present embodiment, the case where two supply parts for supplying the solidifying material to the mixer 1301, the solidifying material supplying part 9 and the preliminary solidifying material supplying part 11 are provided, is described. One may be omitted. Further, in the present embodiment, the mud solidifying device 1 brought to the site is to be unloaded from the loading platform 1901 of the truck 19 and installed on the ground of the site for use, but it can be used while being loaded on the loading platform 1901 of the truck 19. Good.

[0056]

As described above, according to the present invention, the mixing means for mixing the mud and the solidifying material, the mud charging section into which the mud is charged, and the mud charging section are disposed below the mud charging section.
In a mud solidifying device comprising a mud transfer means for transferring the mud dropped from the mud input part to the mixing means,
Measuring means for measuring the earth pressure of the mud in the mud charging section, and calculation means for calculating the amount of mud falling from the mud charging section to the mud transfer means based on the change over time of the measurement result of the measuring means. Since the control means for controlling the drive of the mud transfer means based on the calculation result of the calculation means is provided, the supply amount of the mud supplied to the mixing portion with the solidifying material can be kept constant. .

[Brief description of drawings]

FIG. 1 is a side view of a mud solidifying device according to an embodiment of the present invention.

FIG. 2 is a front view of the mud solidification device shown in FIG.

3 is a rear view of the mud solidifying device shown in FIG. 1. FIG.

FIG. 4 is a plan view of the mud solidifying device shown in FIG. 1.

FIG. 5 is an explanatory view showing a state in which the mud solidifying device shown in FIG. 1 is placed on the bed of a truck.

FIG. 6 is a block diagram showing a schematic configuration of a control unit shown in FIG.

[Explanation of symbols]

1 Mud solidification equipment 301 base 501 mud hopper (mud input section) 505 Screw feeder (Muddy soil transfer means) 511 Earth pressure sensor (measurement means) 513 cylinder 515 rotation axis 517 feeding blade 521 motor 1301 mixer (mixing means) 1503 Main control device (calculation means) 1507 Operation control device (control means)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-2-100920 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C02F 11/00 E02F 7/00 B09B 3 / 00

Claims (2)

(57) [Claims] 1. A mixing means for mixing mud and a solidifying material, a mud charging section into which the mud is charged, a mud charging section disposed below the mud charging section, and the mud dropped from the mud charging section. A mud solidifying device comprising: a mud transfer means for transferring to the mixing means; a measuring means for measuring earth pressure of the mud in the mud charging section; and a mud charging section based on a change with time of a measurement result of the measuring means. Solidification of mud, which comprises: a calculation means for calculating the amount of mud falling from the mud transfer means to the mud transfer means; and a control means for controlling the drive of the mud transfer means based on the calculation result of the calculation means. apparatus. 2. The mud transfer means comprises a cylindrical body, a rotary shaft arranged in the cylindrical body, feed blades attached to the rotary shaft, and a motor for rotationally driving the rotary shaft. The mud solidifying device according to claim 1, wherein the control means controls the rotation speed of the motor.