JP3667544B2 - Mud suction suction feeder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mud-suction suction quantitative supply device suitable for sucking mud generated in construction work such as propulsion work, shield work, foundation work, etc., and supplying it quantitatively to a solidification processing apparatus.
[0002]
[Prior art]
The soft mud generated in construction work such as propulsion work with pipe propulsion machine, shield work, foundation work with vertical hole excavator, etc. is called construction sludge. After dewatering as industrial waste, it is landfilled at the final disposal site. It has been disposed of. This mud, called construction sludge, is a mud and plastic soil with a high water content ratio that contains a large amount of fine particles, and unlike ordinary construction residual soil, it is handled as industrial waste regardless of the presence or absence of harmful substances. It is stipulated to dispose of it at a predetermined final disposal site. Recently, however, the difficulty of locating the final disposal site for industrial waste has become serious, and it has been demanded to promote the recycling of construction byproducts. For this reason, regulations have been relaxed recently so that mud soil as construction sludge modified to the same properties as general construction residual soil can be reused in the same way as general construction residual soil, rather than being disposed of as industrial waste. . For this reason, for the mud that had not been used up to now, the contractor himself / herself mixed the solidified material at the site where the mud was generated and in the vicinity of the mud to improve the soil. As a result, there is a growing sense of creating utility value and transporting it directly from the reforming process site to the reuse destination for reuse such as roadbed materials, backfill soil, residential land preparation soil, bank embankment, etc. Yes.
[0003]
As a method for performing a reforming treatment at or near the site where mud is generated, there is known a method of mixing a fixed ratio of cement-based or lime-based solidified material with mud. As a method of mixing the solidified material with the mud, a primitive method in which the solidified material is sprinkled on the mud placed on the ground and then stirred using a construction machine such as a hydraulic excavator has been generally performed. In recent years, however, paddle screws (a device that feeds the mixture while stirring and mixing it with a blade) and rotary kiln have been recently installed because the solidified material is not mixed with the mud uniformly and a large site is required for the agitation treatment of the mud. The continuous stirring and mixing type solidification processing apparatus used has begun to be used. In order to supply the mud generated at the construction site to such a solidification processing device, it is necessary to put the mud on the ground into a hopper and temporarily store it, but there is a problem when solidifying the mud with the solidification processing device One problem is how to quantitatively supply the mud stored in the hopper to the solidification processing apparatus. In other words, to improve the quality of the mud by mixing it with the solidified material, it is necessary to maintain a constant quality after the solidification of the mud, but for that purpose, the mixing ratio of the solidified material to the mud is required. This is because it needs to be kept constant.
[0004]
As a method of keeping the mixing ratio constant, a method of automatically adjusting the solidification material mixed into the mud while measuring the input amount of the mud to the solidification processing apparatus so that the mixing ratio becomes an appropriate value as needed, There is a method in which the amount of mud input to the solidification processing apparatus is quantified, and then a predetermined amount of solidifying material corresponding to the amount of mud input is input so that the mixing ratio becomes an appropriate value. Among these methods, the former method is actually difficult to measure the amount of mud that changes from moment to moment. Therefore, the latter method, ie, the mud, is used to quantify the amount of mud input to the solidification equipment. A method of supplying a fixed amount to the solidification processing apparatus is simple and practical.
[0005]
[Problems to be solved by the invention]
By the way, as a method for quantitatively supplying mud to a solidification processing device such as a paddle screw or rotary kiln, the mud is supplied by connecting the hopper storing mud and the solidification processing device with a belt conveyor or screw conveyor. Methods are conventionally known. Such conventional methods attempt to supply mud mud to the solidification processing apparatus after the mud on the ground is put into a hopper and temporarily stored, but there are difficulties in the following points.
[0006]
B) The amount of supply from the hopper to the conveyor is likely to fluctuate due to changes in the head due to changes in the amount of mud remaining in the hopper, as well as changes in properties such as viscosity and fluidity of the mud. In particular, in the method using a screw conveyor, when the properties of the mud changes, the screw conveyance efficiency varies, and therefore it is impossible to quantitatively supply the mud based on the screw rotation speed setting.
B) When mud is collected in the ground or in a groove dug in the ground, a means for easily putting the mud into a hopper and collecting it is necessary.
C) Although it is often possible to secure only a relatively narrow place at or near the site where mud is generated to install a solidification processing device or a hopper, in the conventional method, there is a gap between the hopper and the solidification processing device. Because it is connected by a rigid means such as a belt conveyor or screw conveyor that is not flexible, the entire equipment is large and it is difficult to arrange elastically, so it can be installed without difficulty to adapt to such a narrow place. Difficult to do.
[0007]
When quantitatively supplying mud to the solidification processing equipment, in the field work around the site where mud is generated, not only the basic problem of a) but also the problem of simple recovery of mud of b) and the narrowness of c). Solving the problem of adaptation to the installation space is an extremely important issue in order to facilitate the work. As auxiliary means for solving the problem (b), a method using a hydraulic excavator and a method using a vacuum car are conceivable. The former method using a hydraulic excavator is a method in which mud on the ground is scooped up by a bucket of a hydraulic excavator and is put into a hopper and collected, but requires a relatively large mud pool and a space for moving the bucket. Has a detrimental effect such as a danger because the bucket is driven at a construction site where many workers are working. On the other hand, the method using a vacuum car is preferable as a solution to the problem of b) because these difficulties are alleviated and the mud on the ground can be sucked into the vacuum tank as if it were sucked up with a vacuum cleaner. It can be said that it is a method.
[0008]
However, this vacuum car, when discharging the suction to the vacuum tank, raises the pressure in the vacuum tank to be higher than the atmospheric pressure, contrary to the time of suction, and discharges it through the discharge hose at that pressure. When the car is used for collecting mud, it becomes difficult to quantitatively supply the mud to the solidification processing device. Moreover, when the suctioned material in the vacuum car settles and does not flow, the vacuum tank is opened and the tank itself is tilted so that the suctioned material is discharged as if a loose load is unloaded from the dump truck. Therefore, the method using the vacuum car cannot solve the problem of the quantitative supply of mud to the solidification processing device, which is indispensable to the mud suction and supply device.
[0009]
The present invention was created in view of such a state of the art, and can easily collect mud and reliably supply it to the solidification processing apparatus, and is excellent in adaptability to a narrow installation space. An object of the present invention is to provide an aspiration quantitative supply device.
[0010]
[Means for Solving the Problems]
These technical problems of the present invention are:
A mud suction suction and supply device that sucks mud generated in construction work and supplies it to a solidification processing device for mixing with solidification material.
A vacuum generator for generating negative pressure and a mud suction hose are connected, and the vacuum generator can reduce the internal pressure to suck the mud through the mud suction hose and open it to the atmosphere as necessary. A vacuum tank that can temporarily store mud, a hopper that is installed below the vacuum tank to store mud in the vacuum tank, and the vacuum tank and hopper are airtight when closed Opening and closing means that can drop and transfer mud accumulated in the vacuum tank to the hopper when it is opened and a displacement pump that can pump mud in the hopper, and solidify the mud in the hopper through the hose. This is achieved by configuring the apparatus so that it can be quantitatively supplied by a positive displacement pump.
[0011]
Since the mud suction constant supply device of the present invention is configured as described above, when the vacuum generator is operated, the air in the vacuum tank is sucked by the vacuum generator and the internal pressure of the vacuum tank becomes negative. In this state, if the open end of the mud suction hose is immersed in the mud pool, the mud is sucked through the mud suction hose into the vacuum tank as if it was sucked by a vacuum cleaner. it can. The collected mud is temporarily stored in a vacuum tank. After thus mud is accumulated appropriate amount into the vacuum tank, when opening the opening and closing means opens the vacuum tank to the atmosphere, mud in the vacuum tank, it is was transferred to smoothly fall into the hopper, to turn the hopper Can be stored. Thereafter, the opening / closing means is closed, and in this state, the suction of the air in the vacuum tank by the vacuum generator is resumed. On the other hand, when the positive displacement pump is operated, the mud in the hopper gets negative pressure in the vacuum tank. Without being affected, it is always pumped smoothly by a positive displacement pump and reliably supplied in a fixed quantity to the solidification processing apparatus. By repeating these steps, mud is continuously supplied in a fixed quantity from the hopper as a base.
[0012]
Also, when the mud in the hopper is supplied to the solidification processing device, unlike the conventional case, it is supplied using a positive displacement pump, so that a hose is provided between the hopper and the solidification processing device via the pump. It becomes possible to connect and supply. As a result, the entire equipment including the solidification treatment device can be made smaller than before, and the position of the mud suction suction and supply device relative to the solidification treatment device can be flexed by arbitrarily bending the hose according to the situation around the mud generation site. Therefore, it is possible to appropriately arrange the mud suction suction and supply device so as to adapt to a narrow installation space.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be clarified below by describing concrete examples showing how the present invention is actually embodied based on FIG. 1 to FIG. 4. FIG. 1 is a cross-sectional view showing the basic structure of a mud suction suction and supply device according to an embodiment of the present invention, and FIG. 2 shows when mud is sucked and mud is supplied to a solidification processing device by the device of FIG. FIG. 3 is a cross-sectional view showing a state when the mud in the vacuum tank is dropped into the hopper by the apparatus of FIG. 1, and FIG. 4 is a mud suction according to an embodiment of the present invention. It is a figure which shows the modification of a fixed amount supply apparatus.
[0014]
In FIG. 1 to FIG. 3, a vacuum tank 1 is connected to a mud suction hose 7, the internal pressure of which is negative, and mud can be sucked through the mud suction hose 7, and 2 is installed so as to be directly connected below the vacuum tank 1. The hopper 21 is hermetically closed between the vacuum tank 1 and the hopper 2 when closed, and an opening / closing device that can drop the mud accumulated in the vacuum tank 1 onto the hopper 2 when opened, 3 is installed at the bottom of the hopper 2 Sediment pressure pump that can feed the mud in the hopper 2 by a constant amount, 4 is a vacuum generator for generating negative pressure provided with a vacuum pump (not shown), 41 is the operation of the vacuum generator 4 An air suction pipe 42 for sometimes sucking air in the vacuum tank 1 and leading it to a vacuum pump is a vacuum for the air in the vacuum tank 1 sucked by the air suction pipe 41. The air discharge pipe 5 for discharging from the pump is a control provided with various operation means and control means for driving and stopping the operation of the earth and sand pressure pump 3 and the vacuum generator 4 and for opening and closing the opening and closing device 21. , 6 is a hydraulic pressure generator for a sediment pressure pump that generates hydraulic pressure for driving the sediment pressure pump 3, 7 is a mud suction hose that sucks mud from the open end and leads it to the vacuum tank 1, and 8 is a sediment pressure pump 3. It is the flexible mud supply hose which supplies the mud sent by pressure to a solidification processing device (not shown). Here, the following description is given on the assumption that a vacuum pump is installed in the vacuum generator 4, but an air suction pump may be installed instead of the vacuum pump.
[0015]
The vacuum tank 1 can not only suck mud through the mud suction hose 7 by making the internal pressure negative by operating the vacuum generator 4, but can also open it to the atmosphere as needed. Therefore, in the vacuum generator 4, the air suction pipe 41 and the air discharge pipe 42 are connected via the vacuum pump of the vacuum generator 4 by operating the valve, or directly without using the vacuum pump. A pneumatic circuit (not shown) is formed. The vacuum tank 1 is provided with a discharge port at the bottom for discharging mud accumulated in the hopper 2, and the discharge port can be opened and closed by an opening / closing device 21. The opening / closing mechanism for opening / closing the opening / closing device 21 will be described in detail later. The vacuum tank 1 functions to temporarily accumulate mud by providing such a structure. Further, the vacuum tank 1 is provided with a connecting pipe 11 for connecting the mud suction hose 7, and the mud suction hose 7 is connected via a connecting portion 71 such as a electric joint or a flange. The earth and sand pressure pump 3 may be of any type as long as it is a positive displacement pump that can pump and feed mud. A connecting pipe 31 for connecting the mud supply hose 8 is attached to the earth pressure pump 3, and the mud supply hose 8 is connected via a connection part 81 similar to the connection part 71.
[0016]
Next, an opening / closing mechanism for opening / closing the opening / closing device 21 will be described. 22 is an open / close shaft support plate fixed in the vicinity of the discharge port of the vacuum tank 1, 23 is an open / close shaft for pivotally supporting the open / close device 21 on the open / close shaft support plate 22 so that the discharge port of the hopper 2 can be opened and closed, and 24 is an open / close shaft. A piston tip pin for pivotally attaching the piston tip of the cylinder 25 to the opening / closing device 21, 25 is a hydraulic / pneumatic driving opening / closing cylinder for driving to open / close the opening / closing device 21, and 26 is an opening / closing cylinder 25. A cylinder rear end pin 27 for attaching the cylinder rear end portion to the cylinder rear end pin support plate 27 is a cylinder rear end pin support plate fixed to the bottom surface portion of the vacuum tank 1 and the inner peripheral portion of the hopper 2. The opening / closing device 21 includes an opening / closing portion 21 a that opens and closes the discharge port of the hopper 2, a shaft support portion 21 b that is pivotally supported by the opening / closing shaft 23, and a driven portion 21 c that is driven by the opening / closing cylinder 25. The piston tip of the open / close cylinder 25 is pivotally attached to the driven part 21c of the open / close device 21. The opening / closing cylinder 25 swings and closes the opening / closing device 21 so that the discharge port of the vacuum tank 1 is airtightly closed by the opening / closing portion 21a when extended, and swings so as to open the discharge port when contracted. Open the switchgear 21.
[0017]
Since the mud suction suction and supply apparatus exemplified here has the structure as described above, when the vacuum generator 4 is operated by operating the operating means of the control panel 5, the air in the vacuum tank 1 is sucked into the air. The air is sucked by the vacuum pump in the vacuum generator 4 through the pipe 41 and discharged from the vacuum pump to the atmosphere through the air discharge pipe 42. As a result, the pressure in the vacuum tank 1, that is, the internal pressure becomes substantially negative with respect to the atmospheric pressure, and a high-speed air flow is generated in the mud suction hose 7 from the open end of the hose toward the vacuum tank 1. When the open end of the mud suction hose 7 is immersed in the mud pool 10 in this state, the mud is sucked into the vacuum tank 1 through the mud suction hose 7, and the velocity of the airflow rapidly decreases in the vacuum tank 1, The mud falls and settles alone in the vacuum tank 1 and can be easily recovered.
[0018]
The mud collected in this way is temporarily stored in the vacuum tank 1. As a result, when an appropriate amount of mud has accumulated in the vacuum tank 1, after the operation of the vacuum generator 4 is stopped, the air suction pipe 41 and the air discharge pipe 42 are directly connected by the operation of the valve to connect the vacuum tank 1 to the atmosphere. The vacuum tank 1 is operated so that the internal pressure of the vacuum tank 1 becomes equal to the atmospheric pressure. Next, when the opening / closing device 21 is opened by operating the opening / closing cylinder 25, the mud in the vacuum tank 1 is smoothly dropped and transferred into the hopper 2, and is now stored in the hopper 2. Thereafter, the opening / closing device 21 is closed, and in this state, the suction of the air in the vacuum tank 1 by the vacuum generator 4 is resumed. On the other hand, when the earth pressure pump 3 is operated, mud in the hopper 2 Without being affected by the negative pressure, the soil is always smoothly pumped by the sediment pump 3 and supplied to the solidification processing apparatus (not shown) through the mud supply hose 8. In that case, the mud in the hopper 2 can be quantitatively supplied by the function of the sediment pressure pump 3 as a positive displacement pump. This mud suction constant supply device collects the mud on the ground by repeating these processes, and continuously supplies the fixed amount to the solidification processing device using the hopper 2 as a base . During this time, the sediment pump 3 is stopped. Even if the operation is continued continuously, the mud soil can be continuously and quantitatively supplied without any trouble because the system for repeatedly supplying and storing the mud from the vacuum tank 1 to the hopper 2 as described above is employed. When the mud viscosity is high or when the mud supply hose 8 is long, and the mud in the mud supply hose 8 is not likely to flow backward even if the inside of the hopper 2 is evacuated, the switchgear 21 is opened. In the state as it is, the suction and pumping of the mud may be carried out continuously continuously.
[0019]
As is clear from the above description, the present mud suction constant supply apparatus is provided with the vacuum tank 1 that can suck mud through the mud suction hose 7 with the internal pressure set to a negative pressure by the operation of the vacuum generator 4, so Since it can be sucked into the vacuum tank 1 through the mud suction hose 7 so as to be sucked by a vacuum cleaner, the mud can be easily recovered. Further, in addition to the mud soil in the hopper 2 being pumped by the volume-type sediment pressure pump 3, the vacuum tank 1 can be opened to the atmosphere as needed, and the hopper is disposed below the vacuum tank 1. 2 is installed so that the air between the vacuum tank 1 and the hopper 2 can be hermetically shut off by the opening / closing device 21 when the air in the vacuum tank 1 is sucked, so that the mud in the hopper 2 can be continuously fed to the solidification processing device . it can be reliably quantified supplied.
[0020]
Further, when the mud in the hopper 2 is supplied to the solidification processing apparatus, unlike the conventional case, the mud soil is supplied using the sediment pressure feeding pump 3, so that the soil pressure feeding pump 3 is connected between the hopper 2 and the solidification processing apparatus. It becomes possible to connect and supply with the mud supply hose 8 via. As a result, the entire equipment including the solidification processing apparatus can be made smaller than before, and the mud supply hose 8 can be arbitrarily bent according to the situation around the mud generation site, thereby Since the position can be elastically adjusted, the mud suction suction and supply device can be appropriately arranged so as to be adapted to a narrow installation space. As a result of the above, according to the present mud suction suction and supply device, mud can be easily recovered and reliably supplied to the solidification processing device, and the mud suction and feeding device has excellent adaptability to narrow installation spaces. Is obtained.
[0021]
Finally, a modified example of the mud suction and supply device will be described with reference to FIG. The mud suction suction and supply device shown in FIG. 4 is configured such that the mud suction suction and supply device is installed on the crawler type traveling body 9 so as to be able to run on its own. The crawler type traveling body 9 is a traveling body that uses an endless chain-like crawler belt 9a driven by a sprocket 9c as propulsion means, and the crawler belt 9a is attached to sprockets 9c and idlers 9d provided at both ends of the traveling body frame 9b. It is hung, driven by a sprocket 9c, and rotated while being guided by an idler 9d. 4 is coupled with the fact that the crawler-type traveling body 9 can be self-propelled so that a hose can be connected between the sediment pressure pump 3 and the solidification processing apparatus. Even when mud pools are scattered at various locations on the construction site, they can be moved and installed freely in the mud pool areas of the site, and the installation is convenient. It can be easily transferred to the construction site and the operating efficiency can be improved.
[0022]
【The invention's effect】
As is apparent from the above description, the present invention provides a mud suction suction and supply device that sucks mud generated in construction work and supplies it to a solidification processing device for mixing with a solidifying material. a vacuum generator for being connected to mud suction hose, and can be open to the atmosphere if necessary with by the internal pressure in the negative pressure by the vacuum generator can be sucked mud through mud suction hose mud A vacuum tank that temporarily stores water, a hopper installed below the vacuum tank where mud in the vacuum tank is transferred and stored, and when closed, the vacuum tank and hopper are hermetically shut off and opened. and closing means capable of transferring by dropping the mud collected in the vacuum tank to the hopper, a pump displacement type capable of pumping mud in the hopper Provided, the mud in the hopper structure was "so to enable the determination provided by the solidification processing apparatus positive displacement pump into through a hose, according to the present invention, mud continuously securely to the solidification unit to recover easily the A mud-suction suction and supply device that can supply a fixed amount and is excellent in adaptability to a narrow installation space is obtained. When embodying the mud suction suction and supply device of the present invention, in particular, if embodied as described in claim 2 of the claims, even when mud puddles are scattered in various places of the construction site, It can be moved and installed freely at the place of the mud pool in the place, it is easy to install, and it can be easily transferred to another construction site in the neighboring area to improve the operation efficiency Can do.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a basic structure relating to a mud suction suction and supply device according to an embodiment of the present invention.
2 is a cross-sectional view showing a state in which the mud is sucked and the mud is supplied to the solidification processing apparatus in the apparatus of FIG. 1;
3 is a cross-sectional view showing a state where mud in a vacuum tank is dropped into a hopper with the apparatus of FIG. 1; FIG.
FIG. 4 is a diagram showing a modification of the mud suction suction and supply device according to an embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Vacuum tank 2 Hopper 21 Open / close device 22 Open / close shaft support plate 23 Open / close shaft 24 Piston tip pin 25 Open / close cylinder 26 Cylinder rear end pin 27 Cylinder rear end pin support plate 3 Sediment pressure pump 4 Vacuum generator 41 Air suction pipe 42 Air discharge Pipe 5 Control panel 6 Hydraulic generator for sediment pressure pump 7 Mud suction hose 8 Mud supply hose 9 Crawler

Claims (2)

A mud suction suction and supply unit that sucks mud generated in construction work and supplies it to a solidification processing device for mixing with solidification material. A vacuum generator for generating negative pressure and a mud suction hose are connected. A vacuum tank that can make the internal pressure negative by a vacuum generator and suck mud through a mud suction hose and can be released to the atmosphere as needed to temporarily accumulate mud , A hopper installed below the vacuum tank where mud in the vacuum tank is transferred and stored, and when closed, the vacuum tank and the hopper are hermetically cut off and the mud collected in the vacuum tank is dropped into the hopper when opened. through the opening and closing means capable of transferring, provided a pump of displacement type capable of pumping mud in the hopper, hose mud in the hopper Mud suction dispensing apparatus characterized by being configured so as to be dispensed by the solidification apparatus positive displacement pump into. 2. The mud suction suction and supply device according to claim 1, wherein the device is capable of self-propelling.

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