JP4683521B2 - Asbestos pipe crusher - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an asbestos pipe crushing device for removing an asbestos pipe without performing a chiseling work on an old building that uses the asbestos pipe.
[0002]
[Prior art]
Currently, asbestos dust has been found to cause mesothelioma and lung cancer, so there are strict restrictions on its use, but there was no regulation on asbestos in the past, Asbestos was frequently used as a heat insulating material or an insulating material in buildings.
[0003]
In recent years, it has been time to demolish old buildings that use asbestos, and in order to prevent such asbestos from scattering, the dismantling method has become a problem.
[0004]
For example, in an apartment house, asbestos pipes are buried in the housing as exhaust pipes for bathroom baths, and when assembling this building, the asbestos pipe is first removed before the housing is demolished. When removing the asbestos tube, the casing is crushed with a chipper such as a breaker along the direction in which the tube is buried, and if the asbestos tube is exposed, the asbestos tube is fully sprayed to maintain the wet state and asbestos does not scatter. The work was proceeding according to the removal procedure.
[0005]
However, the above-mentioned dismantling method has problems such as the fact that it takes a considerable amount of time and labor to demolition the housing, so that the dismantling operation cannot be performed efficiently, and it is moistened so that asbestos is not scattered as much as possible. However, even if the work was carried out, it was not possible to completely prevent the asbestos from being scattered, and problems such as the worker and surrounding residents being attacked by the danger of asbestos dust occurred.
[0006]
In order to solve this problem, the present applicant disclosed in Japanese Patent Application Laid-Open No. 2000-226942 that a steel pipe shaft provided with an ultra-high pressure water injection nozzle at the tip can be moved back and forth along the longitudinal direction of the member and rotatable about the axis. Bring the held asbestos pipe crushing device, insert the steel pipe shaft from the top of the asbestos pipe, and connect the suction hose of the vacuum car to the lower end of the asbestos pipe, and connect this suction hose to the decompression device. After connecting the steel tube shaft to the bottom of the hole in the asbestos tube, the steel tube shaft is rotated around the axis and pulled up to the insertion source side, while being pulled to the insertion source side. Asbestos pipes are continuously crushed by spraying water, and asbestos dust and asbestos fragments crushed by the suction hose connected to the lower end of the asbestos pipe are removed by suction. It proposed a device for removing method and therefor asbestos tube as.
[0007]
[Problems to be solved by the invention]
However, the above-described asbestos pipe crusher has the following problems.
[0008]
(1) This type of asbestos pipe crushing device does not have crane facilities etc. on the site, so it is necessary for the workers to manually carry and assemble each disassembled part to the rooftop. In this case, since the apparatus is large and heavy, the labor burden on the worker is large.
[0009]
(2) Steel pipe shafts (unit steel pipe shafts) of a specified length must be inserted into the asbestos pipe while being sequentially added, and when the asbestos pipe is crushed, the unit steel pipe shaft is pulled up while being sequentially collected. Therefore, it takes time to add and collect the unit steel pipe shaft, resulting in poor work efficiency.
[0010]
(3) Many asbestos pipes are straight pipes oriented in the vertical direction, but there are curved asbestos pipes bent at a predetermined curvature and bent asbestos pipes bent in a square shape, and the steel pipe It cannot be handled with a shaft.
[0011]
Therefore, the main problem of the present invention is to reduce the size and weight of the device and make it excellent in portability, eliminate the need to add and recover the shaft, and can also handle curved asbestos pipes and bent asbestos pipes It is to provide an asbestos tube crushing apparatus.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, as the present invention according to claim 1, an ultra-high pressure water injection unit having a rotary injection nozzle head at a tip portion and an ultra-high pressure water pump connected to a rear end portion of the ultra-high pressure water injection unit are sent. An ultra-high pressure hose to be fed, an elevating unit that holds the ultra-high pressure hose freely into and out of the asbestos pipe, and is connected to the rear end of the ultra-high pressure water jet unit and rotates to the rotary jet nozzle head A flexible shaft that transmits driving force, and a rotational driving force applied to the flexible shaft, and the rotary injection nozzle unit is mounted on an asbestos pipe so as to move as the asbestos pipe moves. It consists of a rotary drive unit,
The elevating unit includes a pair of upper elevating pulleys disposed relatively opposite to the upper side and a pair of lower elevating pulleys disposed relatively opposed to the lower side on a gantry at upper and lower stages. These lower side lifting pulleys and upper side lifting pulleys are rotatable in forward and reverse directions, and an ultrahigh pressure hose is passed between the upper and lower lifting pulleys to rotate the upper and lower lifting pulleys. The asbestos pipe crushing apparatus is characterized in that the ultra-high pressure hose can be sent out into the asbestos pipe and can be pulled up from the asbestos pipe.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0014]
In the old apartment house T shown in FIG. 1, asbestos pipes from the bathroom bath are asbestos pipes 1, 1,... Embedded in the housing along the vertical direction for each dwelling unit. In the illustrated example, as shown in FIG. 2, asbestos pipes 1 </ b> A to 1 </ b> D for each floor are embedded side by side in the concrete wall 2, and each asbestos pipe 1 has two heat exhaust ports at the lower end. 1a and 1b, and the upper end opening is an exhaust heat discharge port 1c.
[0015]
〔Device configuration〕
In order to remove the asbestos pipe 1, in this method, as shown in FIG. 3, the exhaust heat release port 1 c portion of the removal target asbestos pipe 1, that is, the rooftop where the upper mouth of the removal target asbestos pipe 1 is open. The suction hose 10 was connected to the asbestos pipe crushing device 3 installed at the site, the pump truck 4 for supplying ultra-high pressure water to the asbestos pipe crushing device 3, and the exhaust heat outlet 1a at the lower end of the asbestos pipe 1 Removal is performed using the vacuum vehicle 5. As shown in FIG. 4, the suction hose 10 of the vacuum vehicle is connected to the lower heat exhaust port 1a out of the two heat exhaust ports 1a and 1b, and is connected to the upper heat exhaust port 1b. On the other hand, the sealing plate 12 is closed at least during construction.
[0016]
As shown in FIG. 5, the asbestos pipe crushing device 3 includes a rotary jet nozzle head 13 </ b> A at a tip portion, and an ultrahigh pressure water jet unit 13 inserted into the asbestos pipe, and a rear of the ultrahigh pressure water jet unit 13. An ultra-high pressure hose 14 connected to the end for feeding ultra-high pressure water; an elevating unit 15 disposed on the gantry 16 for holding the ultra-high pressure hose 14 into the asbestos pipe and pulling up from the asbestos pipe; A flexible shaft 17 that is connected to the rear end of the ultra-high pressure water jet unit 13 and transmits a rotational driving force to the rotary jet nozzle head 13A, and a rotary driving unit 18 that gives the flexible shaft 17 a rotational driving force. It is what is done.
[0017]
As shown in detail in FIG. 7, the ultra-high pressure water jet unit 13 is supported by a substantially cylindrical jet unit main body 13B and a tip portion of the jet unit main body 13B so as to be rotatable around the axis. In the ultrahigh pressure water jetting device comprising the rotary jetting nozzle head 13A, an ultrahigh pressure hose 14 and a flexible shaft 17 are connected to the rear ends. In the illustrated example, in order to simplify the structure for transmitting the rotational driving force, the flexible shaft 17 is arranged in the center of the rear end surface of the ultrahigh pressure water jet unit 13, and the rotational axis of the rotary jet nozzle head 13 A and the flexible shaft 17 are arranged. However, the super high pressure hose 14 may be arranged at the center of the rear end portion and the flexible shaft 17 may be arranged on the side portion by engaging a gear.
[0018]
The rotary spray nozzle head 13A is provided with one or a plurality of spray nozzles 30a and 30b for crushing in the illustrated example with the spray ports directed obliquely downward. The spraying angles of the crushing spray nozzles 30a and 30b are generally in the range of 20 to 40 °, and the spray angles α and β are made different. For example, if the injection angle α of one crushing injection nozzle 30a is about 35 °, the injection angle β of the other crushing injection nozzle 30b is set to about 25 °, respectively. By varying the spray angle at each of the crushing spray nozzles 30a and 30b, when the rotary spray nozzle head 13A is rotated around the axis, the projection range of the ultra-high pressure water can be widened. The crushing efficiency is improved. In this example, two injection nozzles are set as the crushing injection nozzles. However, when the number is larger than this, two or more types of injection angle setting patterns are determined in advance, and each injection nozzle is set. The set injection angle pattern may be assigned alternately around the circumference. Of course, the spray angle may be changed slightly for all of the crushing spray nozzles.
[0019]
The flexible shaft 17 has a structure in which a flexible and deformable inner shaft is rotatably inserted in a flexible and deformable liner tube, and the inner shaft is rotated and injected. The rotation shaft 13C of the nozzle portion 13A is connected to the rotation shaft 13C, and the rotation of the output shaft 18 (described later) is transmitted to the rotation shaft 13C via the inner shaft, so that the rotary jet nozzle head 13A is rotatable. On the other hand, the ultra-high pressure water fed from the ultra-high pressure hose 14 is fed into the rotary shaft 13C via a swivel 13D fitted on the rotary shaft 13C, and passes through the feed path in the rotary shaft 13C. It is sent to the nozzles 30a and 30b.
[0020]
The ultra-high pressure hose 14 is held by an elevating unit 15 installed on the roof so that it can be fed into the asbestos pipe 1 and pulled up from the asbestos pipe 1. As shown in FIG. 6, the lifting unit 15 is disposed on the frame 16 so as to be opposed to a pair of upper lifting pulleys 20 </ b> A and 20 </ b> B that are relatively opposed to the upper side. A pair of lower lifting / lowering pulleys 21A and 21B are arranged in the upper and lower stages, a driving shaft of the motor 22 is connected to a rotating shaft of the lower lifting / lowering pulley 21A, and a belt wheel of the lower lifting pulley 21A. 21a and the belt pulley 20a of the upper lifting pulley 20A, a belt 23 is wound around, and an ultrahigh pressure hose 14 is passed between the upper and lower lifting pulleys 20A, 20B, 21A, 21B. In this state, the super high pressure hose 14 is pressure-bonded and held so as not to slide down, and the upper and lower lifting pulleys 20A and 20B and 21A and 21B are synchronously driven by the electric motor 22. Driven to rotate, ultra-high pressure hose 14 is freely and pulling freely held delivery. In the illustrated example, the ultra high pressure hose 14 is supported by a hose guide 24 above the elevating unit 15 and smoothly enters between the elevating pulleys 20A and 20B and 21A and 21B. The electric motor 22 is controlled by a controller 26 connected by a cable 25 to drive / stop and forward / reverse rotation directions.
[0021]
On the other hand, the rotational drive unit 18 that applies rotational drive force to the flexible shaft 17 is placed on a carriage 27 that includes rollers 27a, 27a,. It moves with insertion and pulling. The drive / stop control of the rotary drive unit 18 is performed by a controller 29 connected by a cable 28. The gantry 16 is provided with a guide roller 19 for guiding the flexible shaft 17 to be fed and pulled back.
[0022]
On the other hand, the pump vehicle 4 for supplying ultrahigh pressure water to the ultrahigh pressure hose 14 has a hydraulic unit 32, a water supply unit 33, a booster (pressure booster) 34, as shown in FIG. , The vehicle in which the super high pressure water generator 6 composed of the accumulator 35 is mounted on the loading platform, the piston in the booster 34 is moved left and right by the hydraulic oil discharged from the hydraulic unit 32, and the water in the water chamber is discharged. It compresses and generates ultra-high pressure water. Further, the pressure of the super high pressure water is kept constant by interposing the accumulator 35 in the middle of the supply path. Typically, the Ultra-high-pressure water generator 6 can generate the 1000~4000kgf / cm ² of about ultrahigh pressure water, the crushing of the asbestos pipe 1 is set to the injection pressure of 2300~2500kgf / cm ² .
[0023]
As a device for sucking and removing asbestos dust and asbestos fragments crushed by the asbestos pipe crushing device 3, the vacuum wheel 5 may be used in the simplest and most efficient manner, but is not limited to this, and the work site site In addition, an apparatus including a suction hose, a decompression device, and a storage tank may be provided. In short, any device capable of suctioning and removing asbestos dust and asbestos fragments generated by crushing by applying a negative pressure through the suction hose 10 connected to the lower end of the asbestos pipe 1 may be used. .
[0024]
Asbestos dust and asbestos fragments (hereinafter referred to as asbestos recovered water) collected together with the jet water by the vacuum vehicle 5 are transported to a treatment facility at the site site or a treatment facility provided at a predetermined location, and asbestos is separated. After that, it is discharged.
[0025]
Specifically, as shown in FIG. 9, sedimentation separation tanks 36A to 36C, the interior of which is partitioned into three tanks by partition walls 37, 37, are connected in series, and first the vacuum wheel 5 is placed in the first sedimentation separation tank 36A. Asbestos recovered water is put in from. Asbestos-recovered water is settled and separated with relatively heavy weight, such as asbestos fragments, by gravity sedimentation in the process in which the water flowing through the respective partition walls 37 and 37 flows into the tanks partitioned in order. The next settling tank 36B, 36C is transferred in this order by the submersible pump 38 set in the final partition tank, and asbestos fibers floating in the water are aggregated by adding a polymer flocculant in 36C, which is the final settling tank. And settled and separated. About the 25-100 micrometers class asbestos fine particle which cannot be isolate | separated also by these sedimentation-separation tanks 36A-36C, after further removing the said asbestos fine particles with the filter 39 from the supernatant water which passed through these sedimentation-separation tanks 36A-36C, It is discharged.
[0026]
By the way, in the present asbestos pipe crushing device 3, the suspension member for suspending the ultra-high pressure water jet unit 13 is an ultra-high pressure hose 14, and the ultra-high pressure hose 14 can be sent and lifted up and down by an elevating unit 15. The shaft 17 may be a suspension member, and the flexible shaft 17 may be freely sent out and pulled up by the elevating unit 15.
[0027]
[Construction procedure]
Hereinafter, the asbestos tube removal procedure using each device described above will be described in detail with reference to FIG.
[0028]
First, before starting the work, the situation before the asbestos tube 1 is removed is photographed with a CCD camera. As shown in FIG. 10 (A), a small CCD camera 41 is attached to the tip of the shaft 40, which is inserted from the exhaust heat discharge port 1c of the asbestos tube 1, and taken over the entire length in the longitudinal direction. Record.
[0029]
Next, as shown in FIG. 10 (B), the asbestos tube crushing device 3 according to the present invention is installed at the upper mouth part (rooftop) of the asbestos tube 1, and two exhausts provided at the lower end of the asbestos tube 1 are installed. Of the heat ports, the upper stage heat exhaust port 1b is closed by a sealing plate 12, and the suction hose 10 of the vacuum wheel 5 is connected to the lower stage heat exhaust port 1a. Further, in the asbestos pipe crushing device 3, while feeding out the flexible shaft 17, the ultrahigh pressure hose 14 is fed out by the lifting pulleys 20A, 20B, 21A, 21B, and the ultrahigh pressure water jet unit 13 is lowered to the bottom of the hole.
[0030]
If the preparatory work so far is completed, the crushing removal of the asbestos pipe 1 will be started. While suction by the vacuum wheel 5 is started, the pump wheel 4 is operated to supply ultrahigh pressure water to the asbestos pipe crushing device 3. In the asbestos pipe crushing device 3, as shown in FIG. 10 (C), by slowly raising the rotary jet nozzle head 13A around the axis, the asbestos pipe 1 is moved from the lower part toward the upper part. Try to crush. At this time, it is desirable to set the rotational speed of the rotary jet nozzle head 13A to approximately 250 rpm and a pulling speed of 300 to 500 mm / min.
[0031]
When the rotary injection nozzle head 13A reaches the exhaust heat discharge port 1c and the crushing removal of the asbestos pipe 1 is completed over the entire length, the procedure shown in FIG. Insert the CCD camera 41 into the hole and check over the entire length. If there is any crushing residue, after checking the depth position, insert the ultra high pressure water jet unit 13 to the crushing residue. Then, the surroundings are again crushed by the injection of ultra-high pressure water.
[0032]
On the other hand, asbestos recovered water recovered by the vacuum wheel 5 is sent to the sedimentation separation process as described above, and the supernatant water after the sedimentation / aggregation separation process is further filtered, and then discharged into the sewer pipe.
[0033]
The above operation is repeated for each asbestos tube 1 to remove all asbestos tubes 1, 1.
[0034]
【The invention's effect】
As described above in detail, according to the present invention, the apparatus can be reduced in size and weight, so that it is excellent in portability. In addition, since it is not necessary to add and recover the shaft as in the prior art, work efficiency is improved. In addition, the ultra-high pressure water jet unit is equipped with a rotatable rotary jet nozzle head and uses a flexible flexible shaft to transmit rotational driving force, making it easy for curved asbestos pipes and bent asbestos pipes. It becomes possible to cope with.
[Brief description of the drawings]
FIG. 1 is an overall view of an apartment house in which asbestos pipes 1 are used as exhaust heat pipes.
FIG. 2 (A) is a longitudinal sectional view of an asbestos pipe embedded site, and FIG. 2 (B) is a view taken along the line BB of FIG.
FIG. 3 is a diagram illustrating a procedure for removing asbestos pipe 1;
FIG. 4 is a diagram showing a suction hose connection procedure at the lower part of the asbestos pipe 1;
FIG. 5 is a side view showing the asbestos pipe crushing device 3;
6A and 6B show a lifting unit 15, where FIG. 6A is a front view and FIG. 6B is a side view.
FIG. 7 is a longitudinal sectional view of the ultra-high pressure water jet unit 13;
FIG. 8 is a device configuration diagram of the ultrahigh pressure water generator 6.
FIG. 9 is a settling process diagram of recovered asbestos pipe mixed water.
FIGS. 10A to 10C are step diagrams for removing asbestos pipe 1. FIG.
[Explanation of symbols]
[0035]
DESCRIPTION OF SYMBOLS 1 ... Asbestos pipe, 2 ... Housing, 3 ... Asbestos pipe crushing device, 4 ... Pump car, 5 ... Vacuum wheel, 6 ... Super high pressure water generator, 10 ... Suction hose, 13 ... Super high pressure water injection unit, 13A ... Rotation Injection nozzle head, 13B ... injection unit main body, 14 ... super high pressure hose, 15 ... elevating unit, 16 ... mount, 17 ... flexible shaft, 18 ... rotary drive unit

Claims (1)

An ultra-high pressure water injection unit having a rotary injection nozzle head at the tip, an ultra-high pressure hose connected to the rear end of the ultra-high pressure water injection unit and feeding ultra-high pressure water, and sending the ultra-high pressure hose into the asbestos pipe A lifting / lowering unit that can be freely and freely pulled up from inside the asbestos pipe, a flexible shaft that is connected to a rear end portion of the ultra-high pressure water jet unit and transmits a rotational driving force to the rotary jet nozzle head, and a rotational driving force applied to the flexible shaft And a rotary drive unit mounted on a carriage that can travel so as to move as the rotary injection nozzle unit is inserted into the asbestos pipe and pulled up,
The elevating unit includes a pair of upper elevating pulleys disposed relatively opposite to the upper side and a pair of lower elevating pulleys disposed relatively opposed to the lower side on a gantry at upper and lower stages. These lower side lifting pulleys and upper side lifting pulleys are rotatable in forward and reverse directions, and an ultrahigh pressure hose is passed between the upper and lower lifting pulleys to rotate the upper and lower lifting pulleys. The asbestos pipe crushing apparatus is characterized in that the super-high pressure hose can be fed into the asbestos pipe and can be pulled up from the asbestos pipe.

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