JP4381883B2 - High pressure water wall treatment equipment - Google Patents

Description

  The present invention relates to a technical field of adjusting the rotational speed of a nozzle block in a high-pressure water wall treatment apparatus that injects high-pressure water from an injection nozzle while the nozzle block rotates.

Since the surface of concrete structures such as buildings and piers are cracked and deteriorated due to deterioration over time, smoke damage, and neutralization, it is necessary to peel the surface of the structure and repair it. As one, a construction method is used in which high-pressure water collides with a wall surface and peels off. As a conventional high-pressure water wall treatment apparatus, a revolving pipe with an injection nozzle is arranged in a casing, and a revolving pipe with an injection nozzle is rotated by a reaction when high-pressure water is injected from the injection nozzle. (See Patent Document 1).
JP 2003-94394 A

  By the way, since the optimal collision force for separation and the rotational speed of the swivel pipe are different for each structure, it is required to adjust them. However, what has been described above is to rotate the swirl tube by the reaction of injection, so that the impact force or swirl tube can be changed in addition to changing the water supply pressure to the spray nozzle or replacing the spray nozzle with a different spray angle. The rotation speed of could not be adjusted. When the water supply pressure is changed, not only does the collision force fluctuate, but the rotation speed of the swirling pipe changes significantly, making it difficult to match the ideal collision force and rotation speed. Further, even if the slewing pipes with different injection angles are replaced, it is difficult to finely adjust the collision force and the rotational speed of the slewing pipes, and it is complicated to prepare the slewing pipes with different injection angles.

The present invention has been developed in view of the above circumstances, and its object is to provide high-pressure water capable of adjusting the rotational speed of a swirling pipe (corresponding to the nozzle block of the present invention) with an injection nozzle. It is to provide a wall surface processing apparatus .

  In the present invention, a main shaft is rotatably supported in a cylindrical body with its tip protruding, and a nozzle block with an injection nozzle is fixed to the tip of the main shaft. It is premised on a high-pressure water wall treatment device that guides high-pressure water to the injection nozzle through the inside and injects it, and rotates the nozzle block together with the main shaft by the reaction of injection.

According to the first aspect of the present invention, a rotor and a stator for a magnet brake are accommodated in the body, the rotor is fixed on the radially outer side of the main shaft, and the stator is placed on the radially inner side of the body in the radial direction of the rotor. provided clearance is fixed to the outer, provided relatively movable along the rotor in the longitudinal direction of the main axis relative to the stator while maintaining the clearance, the radially outer rotor stator by the movement configurable The covered area can be changed .

  The magnet brake uses a magnet and a conductor, and may be a combination using a magnet for a rotor and a conductor for a stator, or a combination using a magnet for a stator and a conductor for a rotor.

  If the rotor is moved relative to the stator of the magnet brake along the longitudinal direction of the main shaft, the area that the stator covers on the outside of the rotor changes, and accordingly, the brake that suppresses the magnitude of the eddy current and consequently the rotation of the main shaft. The power changes. Therefore, the rotation speed of the nozzle block can be adjusted.

According to a second aspect of the present invention, the body includes a cylindrical case that fixes the stator radially inward, and a second cap that is detachably joined to the front end of the case. The front end of the main shaft protrudes to the outside of the case through the hole in the second cap, and a position adjustment ring with a rotor is inserted radially outside the main shaft. A key is provided between the adjustment ring and a rotor is screwed to the outside of the position adjustment ring in the radial direction. The nozzle block is detachably fixed to the tip of the main shaft, and the second cap and the position adjustment ring are attached. The main shaft supported by the case is detachably provided from the front side .

According to a third aspect of the present invention, the nozzle block includes a shaft-passing portion through which the main shaft is inserted, and an extension cylinder projects in a state of reaching the hole in the second cap at the rear of the shaft-passing portion. A rotary seal that prevents intrusion of the nozzle is provided so as to be able to be inserted into and removed from the outside of the extension cylinder in the radial direction, and a fixing nut for fixing the nozzle block is screwed onto the tip of the main shaft.

  According to the first aspect of the present invention, if the rotor is moved relative to the stator of the magnet brake along the longitudinal direction of the main shaft, the rotation speed of the nozzle block can be adjusted while maintaining the injection pressure from the injection nozzle. Therefore, it is possible to obtain the optimum injection pressure and nozzle block rotation speed for each structure, and the wall surface peeling operation can be performed under the optimum conditions.

In the second and third aspects of the invention, when the rotational speed of the nozzle block is adjusted using the braking force of the magnet brake, the front second cap and the position adjustment ring are sequentially pulled out from the front part of the main shaft. Since the rotor is screwed onto the position adjusting ring, the brake force is adjusted by rotating the rotor to adjust the front / rear position.

  As shown in FIG. 1, the high-pressure water wall treatment apparatus of the present invention rotatably supports a main shaft 3 through a bearing 2 inside a cylindrical body 1 and projects a tip portion of the main shaft 3 from the body 1. A nozzle block 5 with an injection nozzle 4 is fixed to the tip thereof, high pressure water is guided from the main shaft 3 through the nozzle block 5 to the injection nozzle 4, and the high pressure water is injected, thereby the nozzle block 5 together with the main shaft 3. Rotates. The rotation of the nozzle block 5 that rotates together with the main shaft 3 is controlled by adjusting the braking force of the magnet brake 6 accommodated between the body 1 and the main shaft 3 and adjusting the injection angle of the injection nozzle 4.

  As shown in FIG. 1, FIG. 2 or FIG. 4, the body 1 serves as a case for housing the bearing 2 and the magnet brake 6, and narrows the diameter of the case 7 at both ends of the cylindrical case 7. The first cap 8 and the second cap 9 are stopped. More specifically, a small-diameter cylindrical first cap 8 is screwed into the inside of the rear end portion of the case 7, and the attachment 10 is screwed into the inside of the first cap 8 from the rear, so that the attachment 10 extends in the longitudinal direction of the main shaft 3. On the other hand, by extending in a direction perpendicular to the attachment, a high-pressure hose (not shown) connected to the attachment does not interfere with the repair work. On the other hand, the front end portion of the case 7 and the second cap 9 are joined by flange, and the nozzle cover 11 covering the nozzle block 5 is also collectively stopped by the flange joining. The second cap 9 has a flange shape with a flange, and has a punched hole 12 through which the tip of the main shaft 3 passes in the center. An annular rotary seal 13 for preventing water leakage is attached to the front and rear ends of the body 1 along the circumferential direction between the main shaft 3 and the body 1, and the bearing 2 is separated forward and backward between the front and rear rotary seals 13. A magnet brake 6 is accommodated between the bearings 2 which are accommodated along the circumferential direction between the body 1 and the main shaft 3 and are separated from each other in the front-rear direction. In addition to the rotary seal 13, packing (not shown) is inserted in various places to prevent water leakage.

  As shown in FIG. 1 or 2, the main shaft 3 protrudes along the outer periphery of the positioning rod 14, and is held immovably in the front-rear direction in the body 1 by being sandwiched between the front and rear of the positioning rod 14 with play. Is done. Further, the main shaft 3 is positioned by inserting a position adjusting ring 15 for the magnet brake 6 between the bearings 2 separated in the front-rear direction, and fitting the key 16 into each key groove (reference number omitted) of the position adjusting ring 15 and the main shaft 3. The adjustment ring 15 is held unrotatable. Further, the main shaft 3 has a nozzle block 5 inserted into the tip thereof, and the nozzle block 5 is pushed backward by a fixing nut 17 fastened to the tip thereof, and the pushing force is applied to the front bearing 2 and the position adjustment ring 15. , Sequentially transmitted to the rear bearing 2. Here, since the rear bearing 2 is sandwiched and positioned between the inner flange 18 of the case 7 and the end face of the first cap 8, the pushed nozzle block 5 has the front and rear bearings 2 and the position adjustment ring 15. And the main shaft 3 and the nozzle block 5 connected to the position adjustment ring 15 by the key 16 are integrated, and the nozzle block 5 is rotatably held together with the main shaft 3. In addition, a first flow path 19 for high-pressure water is formed in the main shaft 3 along the longitudinal direction, and the first flow path 19 is branched radially in a direction perpendicular to the front portion of the main shaft 3. Yes.

  The magnet brake 6 shown in FIG. 2 or FIG. 3 reduces the rotational speed of the main shaft 3 by the induced electromotive force generated with the rotation of the main shaft 3, and has a cylindrical stator 20 and a small diameter cylindrical shape. It consists of a rotor 21 made of a magnet, and the stator 20 is fixed along the inner peripheral surface of the body 1 by adhesion or the like, and the rotor 21 is fixed to the main shaft 3 so as to be movable back and forth, and the clearance between the rotor 21 and the stator 20 is fixed. Is provided. And the brake force is adjusted by moving the position of the rotor 21 back and forth with respect to the stationary stator 20. The stator 20 is made of a conductor material such as copper in order to generate eddy current.

  The rotor 21 includes an S-pole magnet plate 22 and an N-pole magnet plate 23, and the S-pole and N-pole magnet plates 22, 23 are circled along the outer periphery of a cylindrical stage 24 that is screwed into the position adjustment ring 15. It is stopped by gluing alternately in the circumferential direction. The position adjustment ring 15 is screwed not only with the stage 24 but also with a lock nut 25 for preventing looseness.

  As shown in FIG. 1, the nozzle block 5 is provided with a main block 26 that is radially branched along a direction orthogonal to the longitudinal direction of the main shaft 3, and the injection nozzle 4 is provided in a plurality of branch pipes 27 of the main block 26. The sub-block 28 with an angle is fixed so that the angle can be adjusted, and by changing the angle, the injection angle from the injection nozzle 4 is changed, and the rotational speed of the nozzle block 5 and the collision force of the high-pressure water due to the reaction of the high-pressure water injection are adjusted. It is.

  As shown in FIG. 4, FIG. 5, or FIG. 6, the main block 26 has a shaft passing portion 29 that passes through the main shaft 3 at the center (the location where the branch pipes 27 are concentrated) and enters the body 1. The extension cylinder 30 protrudes behind the shaft passing part 29. Each branch pipe 27 is formed therein with a second flow path 31 communicating with the first flow path 19 in the main shaft 3 along the longitudinal direction, with the outer diameter on the front side being made smaller, and on the front side. Is the attachment portion 32 to the sub-block 28. Further, the attachment portion 32 penetrates the plurality of third flow paths 33 communicating with the second flow path 31 in a direction parallel to the main shaft 3, and a concave groove 34 is formed along the outer peripheral direction on the outlet side of the third flow path 33. It is formed in an annular shape. Note that a stopper 51 is screwed into the tip of the attachment portion 32 to block the tip of the second flow path 31.

  The sub-block 28 has an insertion hole 35 in the rear part thereof, and a fourth flow path 36 communicating from the front surface to the insertion hole 35 is formed at a position corresponding to the concave groove 34, and the outlet side of the fourth flow path 36 is large. The spray nozzle 4 is screwed into the counterbore 37. Then, the insertion hole 35 is inserted into the mounting portion 32 of the main block 26, and the sub-block 28 is fixed by tightening the adjustment nut 38 at the tip of the mounting portion 32 after the spray nozzle 4 is directed to a desired angle. .

  As shown in FIG. 1, the nozzle cover 11 is a case that is open on the front side, and includes a doughnut-shaped rear plate 39 and a side plate 40 that protrudes forward from the periphery of the rear plate 39, and has a cylindrical shape that communicates with the outside. The suction port 41 protrudes outward from a part of the side plate 40 so that the hose connected to the suction port 41 does not interfere with the work, and the high pressure water sprayed from the spray nozzle 4 is peeled off by rebound water or high pressure water. Then, the suction device 41 collects the suction device through a hose. Further, an inward piece 42 protrudes along the inner circumferential direction at the tip of the side plate 40, and a brush 43 protruding forward is stopped by the inward piece 42, and a caster 45 that moves on the wall surface of the structure 44 is attached to the side plate 40. It is fixed outside.

  In the high-pressure water wall treatment apparatus described above, high-pressure water is ejected from the first flow path 19 in the main shaft 3 through the second flow path 31, the third flow path 33, the concave groove 34, and the fourth flow path 36 of the nozzle block 5. 4, high-pressure water is jetted slightly from the jet nozzle 4, and the nozzle block 5 rotates together with the main shaft 3 by the reaction.

  When adjusting the rotational speed of the nozzle block 5 using the braking force of the magnet brake 6, the following procedure is performed. First, the assembled state shown in FIG. 1 is disassembled as shown in FIG. Specifically, first, the bolt 46 and the nut 47 that flange-join the case 7 of the body 1 and the rear second cap 9 are loosened, the stopper plate 48 that has stopped the nozzle cover 11 is removed, and the nozzle cover 11 is removed. Move backward and pull out from attachment 10. Next, the fixing nut 17 on the front side of the main shaft 3 is loosened, and the washer 49, the rotation stopper 50, and the nozzle block 5 are removed in order. The rotation stopper 50 is a U-shaped bent plate. Subsequently, the front second cap 9, the rotary seal 13, the bearing 2, and the position adjustment ring 15 are sequentially pulled out from the front portion of the main shaft 3. Since the stage 24 and the lock nut 25 are screwed into the position adjusting ring 15, the rotor 21 or the lock nut 25 attached to the stage 24 is picked and turned to adjust the front and rear positions of the rotor 21 that is a magnet. Adjust the braking force. Assemble in reverse order after adjustment.

  On the other hand, when the rotation speed of the nozzle block 5 is adjusted by changing the injection angle of the injection nozzle 4, it is performed in the following manner with reference to FIG. 5 or FIG. All that is required is to loosen the adjustment nut 38 and turn the sub-block 28 to the desired angle to tighten the adjustment nut 38. In this case, since the front surface of the nozzle cover 11 is open, it can be adjusted without disassembling other parts. Moreover, the collision force of the high-pressure water with respect to a wall surface can also be adjusted by adjusting an injection angle. Note that by adjusting both the braking force of the magnet brake 6 and the injection angle of the injection nozzle 4, the adjustment range of the rotational speed of the nozzle block 5 is greatly expanded.

It is a longitudinal cross-sectional view which shows the whole image of a high pressure water wall surface processing apparatus. It is an enlarged vertical sectional view near the magnet brake. It is a cross-sectional view showing a magnet brake. It is an exploded view of a high-pressure water wall surface processing apparatus. It is an expanded sectional view of a nozzle block. It is the sectional view on the AA line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body 3 Main axis | shaft 4 Injection nozzle 5 Nozzle block 6 Magnet brake 20 Stator 21 Rotor 26 Main block 27 Branch pipe 28 Subblock 29 Shaft passage

Claims (3)

The main shaft (3) is rotatably supported in the cylindrical body (1) with its tip protruding, and the nozzle block (5) with the injection nozzle (4) is attached to the tip of the main shaft (3). The high pressure water is guided from the inside of the main shaft (3) through the nozzle block (5) to the injection nozzle (4) and injected, and the nozzle block (5) is rotated together with the main shaft (3) by the reaction of the injection. In the high-pressure water wall treatment equipment that
The rotor (21) for the magnetic brake (6) and the stator (20) are accommodated in the body (1), and the rotor (21) is fixed to the outer side in the radial direction of the main shaft (3), and the body (1) The stator (20) is fixed on the radially inner side of the rotor (21) with a clearance provided on the radially outer side of the rotor (21), and the rotor (21) is fixed to the stator (20) with respect to the stator (20) while maintaining the clearance . A high-pressure water wall treatment apparatus characterized in that it can be moved relatively along the longitudinal direction, and the area covered by the stator (20) on the radially outer side of the rotor (21) can be changed by the movable configuration. . The body (1) includes a cylindrical case (7) that fixes the stator (20) inward in the radial direction, and a second cap (9) that is detachably joined to the front end of the case (7). With
The main shaft (3) is rotatably supported inside the case (7),
The front side of the main shaft (3) protrudes outside the case (7) through the hole (12) of the second cap (9),
A position adjustment ring (15) with a rotor (21) is inserted radially outward of the main shaft (3), and a key (16) is provided between the main shaft (3) and the position adjustment ring (15). The rotor (21) is screwed on the radially outer side of the adjustment ring (15),
The nozzle block (5) is detachably fixed to the tip of the main shaft (3),
The second cap (9) and the position adjusting ring (15) are provided so as to be removable from the front side of the main shaft (3) supported by the case (7). High pressure water wall treatment equipment. The nozzle block (5) is provided with a shaft passing part (29) for inserting the main shaft (3), and an extension cylinder (30) is provided behind the shaft passing part (29) in the hole (12) of the second cap (9). A rotation seal (13) that protrudes in a state reaching the position and prevents water from entering the case (7) from the extraction hole (12) so that it can be inserted and removed radially outward of the extension cylinder (30),
The high-pressure water wall surface treatment apparatus according to claim 2, wherein a fixing nut (17) for fixing the nozzle block (5) is screwed to the tip of the main shaft (3).

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