JP4495176B2 - Injection device - Google Patents

Description

  The present invention relates to a technique for peeling a deposit or a surface layer of a structure including a ceiling or a wall of a building, or cleaning a surface of the structure.

  In buildings until about 1974, asbestos-containing materials (for example, a mixture of asbestos and a binder) were frequently used as fireproof materials, heat insulating materials, or sound absorbing materials on ceilings and walls. In recent years, however, it has been pointed out that asbestos may impair the health of the human body, and removal of asbestos-containing materials from existing buildings has become an urgent task. As an apparatus for removing such building deposits, for example, Patent Document 1 discloses an apparatus that injects pressure water onto an asbestos-containing material and sequentially moves the injection position to peel and pulverize the asbestos-containing material. It is disclosed. Further, Patent Document 2 discloses a high water-absorbing polymer laid on the floor in advance, and the asbestos-containing material containing moisture that has dropped on the floor is absorbed by the high water-absorbing polymer to increase the recovery efficiency. ing.

JP-A-1-165875 Japanese Patent No. 2668696

  When the deposits are peeled off by jetting water as in Patent Document 1, the sprayed water and the dust of the peeled deposits float and scatter in a mist state, so that the field of view in the work space deteriorates. When the visibility in the working space deteriorates, it becomes difficult to check the state of peeling of the adhered matter and the workability is lowered. Moreover, since the sprayed water falls on the floor, the water on the floor containing the asbestos-containing material may flow out of the work space. There is a similar twist when peeling dangerous materials other than the above-mentioned asbestos-containing materials.

  If a superabsorbent polymer is laid in advance on the floor as in Patent Document 2, water can be prevented from flowing out of the work space, but the visibility within the work space cannot be prevented from deteriorating. In addition, since it is difficult to spray as much as necessary in a required place, the amount of superabsorbent polymer laid on the floor increases, and further spraying work is required.

  The objective of this invention is providing the injection device which can prevent the outflow of the water outside a work space while improving the visual field in a work space.

According to the present invention, an injection device that injects water onto the surface of a structure and peels off deposits attached to the surface of the structure or the surface layer of the structure or cleans the surface of the structure with the injection pressure The first pipe through which the water is pumped, the second pipe through which the powdery superabsorbent polymer is pumped, the first pipe and the second pipe are connected and supplied from the first pipe And a nozzle that mixes and jets the water and the superabsorbent polymer supplied from the second pipe .

According to the present invention, by mixing and jetting the superabsorbent polymer in the water, the water collides with the surface of the structure and is scattered while being absorbed by the superabsorbent polymer. Therefore, the amount of the water containing the dust of the substance removed from the surface of the structure is suppressed as a mist, and at the same time, the occurrence of the small diameter mist itself is also suppressed, so the mist falls early, The field of view in the work space can be improved. Further, on the floor, the water containing the dust of the substance removed from the surface of the structure is absorbed into the superabsorbent polymer to form smooth particles, so that the water flows out of the work space. Can be prevented. Furthermore, waste of the superabsorbent polymer can be reduced by defining the amount of the superabsorbent polymer according to the amount of water to be jetted. In addition, by supplying the water and the superabsorbent polymer to the nozzle through separate pipes, it is possible to prevent the superabsorbent polymer from excessively absorbing the water during injection and clogging the nozzle.

  In the present invention, a storage unit that stores the mixed powder of the superabsorbent polymer and the powdered abrasive is provided, and the mixed powder is supplied from the storage unit to the nozzle through the second pipe. The nozzle may mix and spray the water and the mixed powder.

  According to this structure, the peeling performance of the deposit | attachment adhering to the surface of a structure can be improved by also injecting the said grinding material. Further, by storing the mixed powder of the superabsorbent polymer and the abrasive in the storage means, it is not necessary to provide individual piping for the injection, and the superabsorbent polymer is further provided. And the adjustment of the injection ratio of the abrasive.

  The present invention having the above-described structure is applied to the surface of a structure such as a ceiling or wall of a building, or the surface layer of the structure is peeled off. Suitable for cleaning the surface of structures such as ceilings and walls of buildings that may be harmful to the human body by peeling off the surface layer or activation, etc. is there.

As described above, according to the present invention, it is possible to provide an injection device capable of improving the visibility in the work space and preventing water from flowing out of the work space. Further, by supplying water and the superabsorbent polymer to the nozzle through separate pipes, it is possible to prevent the superabsorbent polymer from excessively absorbing water during injection and clogging the nozzle.

  FIG. 1 is a configuration diagram of a system B employing an injection device A according to an embodiment of the present invention. System B is a system that removes asbestos-containing materials represented by asbestos-containing sprayed fire-resistant coating materials, which are constructed on the ceiling, walls, etc. of existing buildings.

  Room 1 is a room of an existing building in which asbestos-containing materials are constructed on the ceiling and walls. The chamber 1 is provided with temporary work chambers 2 and 3 adjacent to each other. A robot 4 for removing asbestos-containing material is disposed in the chamber 1. The robot 4 includes a traveling unit 4a (here, a crawler), an articulated arm 4b, and an earthwork plate 4c. A video camera 4d is provided on the upper part of the main body of the robot 4 so that the periphery of the tip of the articulated arm 4b can be photographed.

  The nozzle unit of the injection device A and the bucket 4e can be selectively attached to the tip of the articulated arm 4b. The nozzle unit includes a nozzle 10 and a nozzle support 11. When the asbestos-containing material is peeled off, the nozzle unit is attached to the tip of the articulated arm 4b. The asbestos-containing material that has been peeled off and scattered on the floor is collected by the earthwork board 4c.

  At the time of collecting the peeled asbestos-containing material, the bucket 4e is attached to the tip of the articulated arm 4b. The asbestos-containing material on the floor is lifted up by the bucket 4 e and put into the hopper 5. The asbestos-containing material thrown into the hopper 5 is pumped to the collecting device 7 by the pumping device 6 in the work chamber 3, and is collected in a collecting bag by the collecting device 7.

  In the work room 2, a control device 8 for remotely operating the robot 4 and a television monitor 8 a are disposed. On the television monitor 8a, images captured by the video camera 4d and the video camera 9 that captures various places in the room 1 are displayed. The operator performs remote operation of the robot 4 while viewing the video displayed on the television monitor 8a in the work room 2 to perform the asbestos-containing material removal work.

  Next, the configuration of the injection device A will be described. FIG. 2 is a block diagram of the injection device A. The injection device A includes a flat nozzle type nozzle 10, a nozzle support 11 (not shown in FIG. 2), and a branch pipe 23 connected to the rear portion of the nozzle 10. The branch pipe 23 includes a pipe 21 through which water is pumped and a pipe 22 through which a mixed powder of a superabsorbent polymer and an abrasive is pumped.

  In this embodiment, the water pumped by the pipe 21 is tap water and is stored in the water tank 31. Tap water can be constantly supplied to the water tank 31 from the water supply. The pipe 21 is provided with a water pump 30 that pumps tap water at a high pressure. The water pump 30 sucks tap water from a water tank 31 and pumps it to the nozzle 10.

  A compressor 40 is connected to the pipe 22, and compressed air from the compressor 40 is pumped to the pipe 22. A storage hopper 41 is connected to the middle of the pipe 22. The storage hopper 41 stores mixed powder of powdery superabsorbent polymer and powdered abrasive and supplies a predetermined amount of mixed powder predetermined per unit time to the pipe 22. The mixed powder supplied to the pipe 22 is supplied to the nozzle 10 by compressed air from the compressor 40.

  As a powder of superabsorbent polymer, for example, partially cross-linked sodium polyacrylate granules (for example, trade name: Sunfresh ST-500D, distributor: Sanyo Chemical Industries) absorb water. Any material can be used as long as it produces a particulate gel. Examples of the abrasive include baking soda and calcium carbonate. It is desirable to use a powder having a particle size of about 0.2 to 0.3 mm for both the superabsorbent polymer and the abrasive. The volume ratio of the superabsorbent polymer in the mixed powder is desirably 5 to 20%, and if it is within this range, the water sprayed by the superabsorbent polymer can exhibit the effect of removing the asbestos-containing material by the abrasive. Can be obtained.

The amount of tap water, superabsorbent polymer, abrasive and air per unit from the compressor 40 is, for example, tap water 5.4 l / min, superabsorbent polymer 70 ml / min, abrasive. Of 430 ml / min and air of 3 to 3.5 m ³ / min.

  In the injection device A having such a configuration, the tap water pumped through the pipe 21 and the mixed powder of the superabsorbent polymer and the abrasive that are pumped through the pipe 22 merge before the nozzle 10. Are mixed and sprayed from the nozzle 10 onto the wall surface to which the asbestos-containing material has adhered. The asbestos-containing material is peeled off from the wall surface or the like by the injection pressure.

  By mixing the superabsorbent polymer with the tap water to be sprayed, the tap water containing the dust of the asbestos-containing material peeled off collides with a wall or the like while being absorbed by the superabsorbent polymer. At this time, the impact of water is mitigated because it contains a large number of microgels, and the amount of floating water that becomes dust from asbestos-containing materials is suppressed, and at the same time, the occurrence of small-diameter mist itself Since the generated mist falls relatively early, the visibility in the work space is improved. Specifically, the image in the room 1 taken by the video cameras 4d and 9 becomes clearer and is displayed on the television monitor 8a. The worker can proceed with the work while confirming the peeled state of the asbestos-containing material on the television monitor 8a.

  Moreover, since tap water containing dust of asbestos-containing material is absorbed by the superabsorbent polymer into gel particles on the floor of the chamber 1, the tap water may flow out of the work space. Can be prevented. Further, since the asbestos-containing material can be collected as smooth particles, the collection by the earthwork plate 4c and the scooping by the bucket 4e become easier and the collection efficiency can be increased. Furthermore, by defining the amount of superabsorbent polymer according to the amount of tap water to be jetted, waste of superabsorbent polymer can be reduced, and superabsorbent polymer can be preliminarily placed on the floor. There is no need to spray.

  By spraying in a state where tap water and superabsorbent polymer are mixed by a single nozzle 10 as in the present embodiment, not only can the configuration of the apparatus be simplified, but also tap water using the superabsorbent polymer. Improve water absorption. Also, tap water and superabsorbent polymer are supplied to the nozzle 10 through separate pipes (21, 22) and mixed immediately before jetting, so that the superabsorbent polymer absorbs tap water excessively at the time of jetting. Thus, the nozzle 10 can be prevented from clogging.

  Moreover, in this embodiment, the peeling performance of asbestos-containing material can be improved by also injecting the abrasive. In addition, by storing the mixed powder of the superabsorbent polymer and the abrasive in the storage hopper 41, it is not necessary to provide separate piping and storage hopper for these injections, and the apparatus can be simplified. Since the injection ratio of the water-absorbing polymer and the abrasive can be adjusted by the input amount of the storage hopper 41, the injection ratio can be easily adjusted.

It is a lineblock diagram of system B which adopted injection device A concerning one embodiment of the present invention. 2 is a block diagram of an injection device A. FIG.

Explanation of symbols

A Injection device 10 Nozzle 20 Branch piping 21, 22 Piping 41 Storage hopper

Claims (2)

In an injection apparatus that sprays water onto the surface of a structure and performs the separation of the deposits attached to the surface of the structure or the surface layer of the structure or the cleaning of the surface of the structure with the injection pressure .
A first pipe through which the water is pumped;
A second pipe through which a powdery superabsorbent polymer is pumped;
A nozzle that connects the first pipe and the second pipe, mixes and injects the water supplied from the first pipe and the superabsorbent polymer supplied from the second pipe;
Ejecting apparatus comprising the. Retaining means for storing mixed powder of the superabsorbent polymer and powdered abrasive,
The mixed powder is supplied from the storage means to the nozzle through the second pipe,
The spray device according to claim 1 , wherein the nozzle mixes and sprays the water and the mixed powder.

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