JP2005058975A - Rotary nozzle apparatus for cleaning used in water - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable number of rotation of a rotary head to be freely set correspondingly to a using state and to realize injection of high pressure water from two directions, that is from a perpendicular direction and an oblique direction, which are effective for removing scales, or the like, adhered to an inner wall surface of a well pipe or the like. <P>SOLUTION: A plurality of nozzle arms 33, 33 are protrusively provided in a radial direction of the rotary head body 32 and a first injection nozzle 36A and a second injection nozzle 36B are attached to respective nozzle arms 33. The first injection nozzle 36A is attached in the same direction as the nozzle arm 33 and the second injection nozzle 36B is attached in a direction where torque is given to the nozzle arm 33. By adjusting an angle of the nozzle arm 33, only an angle of the second injection nozzle 36B is changed without changing the direction of the first injection nozzle 36A. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a rotary nozzle device for cleaning that is equipped with a plurality of jet nozzles for jetting high-pressure water fed from a high-pressure water source and includes a rotary head that rotates by reaction of the jetted high-pressure water.

   Water quality management and sanitation in facilities that handle water such as water tanks for drinking water and industrial water, various tanks installed in purification facilities, pools, fish tanks, aquarium tanks, well pipes, large pipes, etc. Some items require regular cleaning from the viewpoints of management and securing the amount of spring. Of these, those that have a large open area on the ground and within a certain limit, such as pools and fish tanks, drain the stored water and easily clean it with workers inside be able to.

  On the other hand, for example, when the object to be cleaned has a small opening area in the ground part and a deep depth, such as a shaft of a well pipe or a large-diameter pipe, the inner diameter may not be able to enter the worker. There are also significant dangers when this is possible. With regard to cleaning of such well pipes and the like, cleaning using a high-pressure water cleaning apparatus is performed today. The high-pressure water washing apparatus includes a rotary head having a plurality of injection nozzles attached thereto, and sprays high-pressure water from the injection nozzle toward the inner wall surface of the well pipe while lowering the rotary head into the well pipe. The inner wall surface of a pipe or the like is washed by water hammer. Under the present circumstances, the rotary head which attached the injection nozzle has taken the structure rotated by reaction of the high pressure water injected from an injection nozzle. This is because if the rotating head does not rotate smoothly, it is difficult to clean the entire inner wall surface of a cylindrical well pipe or the like.

  A rotating nozzle device that is rotated by a reaction of high-pressure water ejected from an ejection nozzle has already been disclosed in the following literature.

JP 2001-193106 A

JP 2002-192094 A

  In Patent Document 1 and Patent Document 2, a rotating body having an injection nozzle in a well pipe is suspended using a hose, and high-pressure water supplied from the ground side through the hose is supplied from the injection nozzle to the inner wall surface of the well pipe. There is shown a cleaning method and a cleaning apparatus that sprays and removes clogging substances and other clogging substances adhering to a well pipe by high-pressure water hammer from the inner wall surface of the well pipe.

  The rotator in these cleaning devices is devised to rotate by the reaction of the high-pressure water ejected from the ejection nozzle. As a means for this purpose, a pair of spray nozzles located on the opposite side of the rotating shaft of the rotating body is arranged symmetrically with the rotating shaft sandwiched between them, or the water jet direction from the spray nozzle is rotated. A method of deflecting a certain angle from the radial direction of the body is employed. With any of these means, it is possible to apply torque to the rotating body by jetting high-pressure water, and depending on the difference in means for applying torque to the rotating body, the high-pressure water jetted from the jet nozzle There is a difference between what is injected from a direction substantially perpendicular to the inner wall surface of the tube and what is injected from an oblique direction.

  Assuming that the speed of the high-pressure water jetted from the jet nozzle is the same, the water hammer force when jetted from a direction substantially perpendicular to the inner wall surface of the well pipe is jetted from the oblique direction. It is larger than the water hammer power. Accordingly, the ability to remove dirt such as well pipes also varies depending on the difference in water hammer power. However, water hammer from the oblique direction may be effective depending on the attachment mode such as the scale attached to the inner wall surface of the well pipe, etc., and the most effective is from both the vertical direction and the oblique direction. It is to add water hammer.

  In any of the above-described cleaning apparatuses, it is possible to uniformly clean the inner wall surface of the well pipe having a cylindrical shape by ensuring a smooth rotational motion of the rotary head in the well pipe. Further, the rotational speed of the rotary head is not limited to a high speed, and needs to be a rotational speed suitable for the vertical movement speed of the rotary head operated from the ground side. When the vertical movement speed of the rotary head is excessive with respect to the rotational speed of the rotary head, an unwashed part is generated on the inner wall surface of the well pipe. Conversely, when the rotational speed of the rotary head is excessive, This is because the same portion is wasted and washed.

  Among the cleaning apparatuses disclosed in the above publications, regarding the technique that employs the method of symmetrically disposing the injection nozzle with the rotation axis interposed therebetween, the range that can be misaligned is limited to a small range. The problem is that sufficient torque cannot be applied to the rotary head. The misalignment arrangement of the spray nozzle means that the spray nozzle is moved away from the center of the rotary head without changing the direction of the spray nozzle, and the misalignment range is limited. This is because the injection nozzle approaches in a posture parallel to the inner wall surface of the well pipe or the like. In addition, the fact that sufficient torque cannot be applied to the rotating head is accompanied by a change in rotational resistance load in water due to the fact that an appropriate bearing is not used between the rotating shaft and the rotating head. In addition to ensuring a stable rotational operation against load fluctuations, it is also impossible to achieve the rotational speed required to increase the efficiency of cleaning work.

  The reason why the bearing is not used for the bearing portion of the rotary head is that foreign matter in the water is mixed and rotation failure occurs. For this, there is a completely sealed bearing as a mechanical element, but in water where external pressure is applied, the depth of underwater becomes deep because a strict structure combining an internal sealing mechanism with external pressure is adopted. As the external pressure increases, the resistance of the rotating body changes due to the sealing mechanism, resulting in malfunction.

  Further, among the cleaning apparatuses disclosed in the above publications, regarding a technique for applying torque to a rotating head by bending a pair of nozzle arms, which are attachment members for injection nozzles, in a symmetric direction with respect to the rotation axis, As a high torque is required to impart rotation, there is a trade-off problem that the water hammer required for cleaning decreases. That is, if the nozzle arm is bent greatly in order to generate a high torque, the spray nozzle is in a posture that is almost parallel to the inner wall surface of the well pipe and the like, and water hammer cannot be applied from an angle close to the vertical. Even if the injection pressure of the high-pressure water injected from the nozzle is the same, it becomes difficult to apply a large water hammer force to the inner wall surface of the well pipe or the like.

  Accordingly, an object of the present invention is to realize injection of high-pressure water from two different directions, that is, a vertical direction and an oblique direction, which are effective for removing scales and the like, and to freely set the rotational speed of the rotary head in accordance with the use situation. In addition, a pair of seal rings are fitted into the bearing portion of the rotary head to seal foreign matter from the outside, and the internal water pressure is released in a timely manner to achieve stable rotational operation. Another object of the present invention is to provide a rotating nozzle device for cleaning.

  In order to solve the above-mentioned problem, a cleaning rotary nozzle device used in water according to claim 1 of the present invention has a plurality of injection nozzles for injecting high-pressure water fed from a high-pressure water source, In a rotary nozzle device for washing with a rotary head that rotates by reaction, the rotary head has a rotary shaft in which a water guide hole communicating with a high-pressure water source is formed in the center and a shaft hole that receives the rotary shaft in the center. A rotary head body that is rotatably attached to the rotary shaft, a plurality of nozzle arms that have a water guide hole in the center and project radially from the rotary head body, and a first injection nozzle that is attached to the nozzle arm The rotary head body has an annular water passage communicating with the water guide hole of the rotary shaft inside the shaft hole, and the water guide hole of the nozzle arm is connected to the rotary shaft via the annular water passage. In the water conveyance hole The first injection nozzle is attached to the tip of the nozzle arm in the same direction as the nozzle arm, and the second injection nozzle is in a direction to apply torque to the rotary head body by reaction of the high-pressure water to be injected. It is attached.

  According to the present invention, the high-pressure water supplied to the water guide hole at the center of the rotating shaft is guided to the annular water channel formed inside the shaft hole of the rotating head body. The nozzle arm is always moved by the rotation of the rotary head body. However, since the annular water channel is ring-shaped, it always communicates with the water guide hole of the nozzle arm regardless of the position change of the nozzle arm. Accordingly, high-pressure water is ejected from the first and second ejection nozzles from the annular water channel via the water guide holes of the nozzle arm. The high-pressure water sprayed from the first spray nozzle can hit the inner wall surface of the well pipe from a substantially vertical direction. The high-pressure water sprayed from the second spray nozzle drives the rotary head body by its reaction, and also waters the inner wall surface of the well pipe from the oblique direction to remove dirt that cannot be removed from the vertical direction. .

  According to a second aspect of the present invention, there is provided a rotary nozzle device for cleaning used in water, wherein the nozzle arm is attached to the rotary head body so that the angle of the nozzle arm is adjustable about the axis of the nozzle arm. It is characterized by.

  According to this invention, when the rotation angle of the nozzle arm is changed around the axis of the nozzle arm, the first injection nozzle attached in the same direction as the nozzle arm, that is, in the axial direction of the nozzle arm, However, it maintains the relationship in the same direction as the nozzle arm. The direction of applying torque to the rotary head body, that is, the second spray nozzle attached to be inclined in any direction with respect to the axis of the nozzle arm is changed in posture by rotating the nozzle arm about the axis. To do. When the attitude of the second injection nozzle changes, the direction of the reaction of the high-pressure water from the second injection nozzle changes, and the torque applied to the rotating head body that rotates by this reaction changes. Therefore, the number of rotations of the rotary head body can be adjusted by an operation of changing the angle of the nozzle arm.

  A rotary nozzle device for cleaning used in water according to claim 3 of the present invention has a plurality of injection nozzles for injecting high-pressure water fed from a high-pressure water source, and rotates with the reaction of the high-pressure water to be injected. In the rotary nozzle device for cleaning used in water comprising a set groove that opens outward at the upper and lower ends of the sliding gap set between the rotary head main body and the rotary shaft of the rotary head main body, A rotating nozzle device for cleaning used in water, wherein a pair of seal rings made of elastic members are fitted in upper and lower set grooves to seal foreign matter from the outside and to release internal water pressure as needed.

  According to the present invention, the pair of seal rings are set grooves formed at two upper and lower ends of a sliding gap set between the rotary head and the rotary shaft in order to make the rotary head main body rotatable. It is inserted in. Each set groove is formed in a shape that opens outward. The pair of seal rings can allow the high pressure water to flow out from the end of the sliding gap when the internal water pressure of the rotary head main body is high due to the water supply pressure from the high pressure water source due to deformation due to elasticity. At this time, a water film of high-pressure water accompanied by a flow is formed inside the sliding gap, and the rotary head main body floats from the rotating shaft by the water film to form a fluid floating bearing by the water film. On the contrary, when the water pressure around the rotary head body is higher, the seal ring closes both ends of the sliding gap to prevent the surrounding sewage containing dust and foreign matter from flowing into the sliding gap. However, a water film of high-pressure water that is stationary around the rotation axis is formed.

  According to a fourth aspect of the present invention, there is provided a cleaning rotary nozzle device for use in water, wherein the seal ring according to the third aspect of the invention is used for cleaning in the water according to the first or second aspect of the invention. The present invention is characterized by being applied to a rotating nozzle device.

  According to this invention, a water film of high-pressure water is formed between the rotating shaft and the rotating head body by mounting the seal ring, and the frictional resistance between the rotating shaft and the rotating head body can be extremely reduced. In any of the inventions, the stability when using low torque and low rotation can be increased.

  According to a fifth aspect of the present invention, there is provided a rotary nozzle device for cleaning used in water, wherein the rotational resistance of the rotary head body is applied to the rotary head body on the premise of the invention according to any one of claims 1 to 4. The brake plate to be increased is protruded.

  According to this invention, the brake plate increases the rotational resistance of the rotary head. Therefore, the rotary head body is rotated against the load on the brake plate. For a rotating object that achieves a predetermined rotational speed with no load and a rotating object that achieves a predetermined rotational speed with a load, the latter rotating object is more stable against external load fluctuations. is there. Therefore, by providing the brake plate, the rotation operation of the rotary head body can be stabilized.

  Here, on the premise of the invention described in claim 5, it is preferable that the angle of the brake plate is adjustable in the direction in which the settling force or the rising force is applied to the rotary head body.

  The second spray nozzle attached to the rotary head main body, when the rotation speed of the rotary head main body is adjusted by rotating the nozzle arm, as a result, applies a settling component force or a rising component force to the rotary head. It becomes. Therefore, when a settling component force is generated in the rotary head body due to the direction of the second injection nozzle, the angle of the brake plate is adjusted in the direction in which the rising component force is generated in the brake plate, and the second injection When upward component force is generated in the rotary head body due to the orientation of the nozzle, the vertical position of the rotary head body is stabilized by adjusting the angle of the brake plate so that the settling component force is generated in the brake plate. Can do.

  The rotary nozzle device for cleaning used in water according to the present invention changes the angle of only the second injection nozzle attached in the direction in which torque is applied to the nozzle arm by rotating the nozzle arm. The rotational speed of the rotary head body can be freely set without deteriorating the cleaning ability of the nozzle, and water can be supplied from two different directions on the inner wall surface of the well pipe or the like by the first injection nozzle and the second injection nozzle. Since the impact can be applied, the ability to remove scales and other clogging-causing substances and dirt substances can be greatly enhanced.

  Another rotary nozzle device for cleaning used in water according to the present invention slides at two ends of a sliding gap formed between a rotary head body on which an injection nozzle is mounted and a rotary shaft thereof. By forming a set groove in a direction to open the gap to the outside and fitting a pair of seal rings made of elastic members into the set groove for elastic sealing, the seal ring has a large external water pressure. When the end of the sliding gap is closed, and when the internal water pressure is larger than the external water pressure, the sliding gap is deformed so that the end of the sliding gap is opened, and contaminated water or foreign matter enters the sliding gap from the outside. A high-pressure water film can be formed in the sliding gap while preventing entry of fluid, and a fluid levitation bearing can be formed. This realizes stable rotation of the rotary head body even when using low torque and low rotation. be able to.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The cleaning rotary nozzle device 30 used in water includes a first injection nozzle 36A and a second injection nozzle 36B and a pair of brake plates 38, 38 mounted via a pair of nozzle arms 33, 33. The rotary head main body 32 and the rotary shaft 31 that rotatably supports the rotary head main body 32 are the main parts (FIGS. 1 and 2).

  The rotary shaft 31 rotatably supports the rotary head main body 32. The rotating shaft 31 is a two-stepped shaft in which a flange joint 3F is integrally processed at the upper end, and a male screw is cut at the lower end portion of the rotating shaft 31. A water guide hole 3A reaching a predetermined depth from the flange joint 3F side is formed in the central portion of the rotating shaft 31, and high pressure water can be introduced into the inside. Communication holes 3B and 3B communicating with the outside are formed in two sides of the water guide hole 3A, and the communication holes 3B and 3B allow high-pressure water introduced into the rotary shaft 31 to flow out to the side. (FIG. 2).

  The rotary head main body 32 is made of a square block material whose four corners are chamfered, and a shaft hole H1 for receiving the rotary shaft 31 is provided at the center. Inside the shaft hole H1, an annular water channel 3C having a form in which the middle portion of the shaft hole H1 is partially expanded is formed. The height of the rotary head main body 32 is set slightly smaller than the interstage length L2 of the two step portions of the rotary shaft 31. The rotary head body 32 is externally fitted between the first step portion and the second step portion of the rotary shaft 31, and falls off by tightening a large lock nut 34 on the male screw at the lower end of the rotary shaft 31. Not built in.

  By setting the height dimension of the rotary head body 32 and the inter-step length L2 to a small difference, the rotary head body 32 can rotate even when the lock nut 34 is tightened. When the rotary head body 32 is attached to the rotary shaft 31, the communication holes 3B and 3B of the shaft hole 3A are in a positional relationship to be connected to the annular water channel 3C. Further, a small difference is set between the outer diameter of the rotating shaft 31 and the inner diameter of the shaft hole H1 of the rotating head body 32 to allow the rotating head body 32 to rotate. This small difference forms a sliding gap ΔD when both are combined.

  The ends of the sliding gap ΔD formed between them are two places between the first step of the rotating shaft 31 and the rotary head main body 32 and between the second step and the lock nut 34. Exists. A set groove 3G is formed at the end of each sliding gap ΔD (FIG. 3). The set groove 3G has a shape that opens the end of the sliding gap ΔD to the outside together with chamfering the corner 3E of the step portion of the rotating shaft 31.

  The set grooves 3G provided at the ends of the two upper and lower sliding gaps ΔD are fitted with seal rings 35, 35 each made of an elastic member, and both ends of the sliding gap ΔD are elastically sealed. . As a result, each seal ring 35 exhibits a sealing function with directionality. This directionality is a direction in which the sealing function is weakened when the water pressure in the sliding gap ΔD is higher than the external water pressure, and conversely, the sealing function is strengthened when the water pressure on the sliding gap ΔD side is low. For the seal ring 35, for example, an O-ring formed from silicon rubber or the like can be used.

  A pair of nozzle arms 33, 33 are attached to the rotary head body 32. Each nozzle arm 33 is formed of a square bar member that can be directly operated with a tool such as a spanner, and has a water guide hole 3D that penetrates the nozzle arm 33 in the axial direction (FIG. 2). The base of each nozzle arm 33 is machined with a male screw, and the opposite surface of the rotary head body 32 located across the center line CL of the rotary nozzle device 30 is adapted to the male screw of the nozzle arm 33, respectively. Screw holes are formed in the radial direction. The pair of nozzle arms 33, 33 is fixed by attaching a lock nut 37 to the male screw portion in advance, screwing a base portion into the screw hole of the rotary head main body 32, and tightening the lock nut 37. Accordingly, each nozzle arm 33 can be adjusted in angle so as to rotate about its axis by loosening the lock nut 37. That is, only the angle of the second injection nozzle 36B can be changed without changing the direction of the first injection nozzle 36A.

  Each nozzle arm 33 is provided with a first injection nozzle 36A and a second injection nozzle 36B. The first injection nozzle 36A is attached to the tip of the nozzle arm 33 in the same direction as the nozzle arm 33, that is, in the radial direction with respect to the rotary head main body 32. The second injection nozzles 36B and 36B are attached to the side surface portion of the nozzle arm 33 in a horizontal posture in a direction orthogonal to the nozzle arm 33, that is, to the rotary head main body 32 in the circumferential direction. Yes. In addition, the second injection nozzles 36B and 36B in the pair of nozzle arms 33 and 33 maintain equal mounting distances L1 and L1 from the center line CL of the device 30 that rotates and are in a line-symmetric posture with respect to the center line CL. It is attached (FIG. 2).

  Brake plates 38 and 38 are attached to the other two surfaces facing each other in the rotary head main body 32 (FIGS. 1 and 4). Each brake plate 38 is composed of a first metal plate P1 bent into an L shape and a second metal plate P2 attached to the tip of the metal plate P1, and the first metal plate P1 is an L-shaped one. One piece is attached to the rotary head main body 32, and the other piece is attached in an upright posture in the radial direction. Therefore, the upright surface of the first metal plate P <b> 1 of each brake plate 38 can receive water resistance due to the rotation of the rotary head body 32, and can exert a braking force on the rotary head body 32.

  The L-shaped first metal plate P1 is screwed to the rotary head main body 32 using two upper and lower bolts b2 and b2, and the lower bolt b2 is a through hole 2h formed in the first metal plate P1. Is inserted. This through hole 2h is for inserting a lower bolt b2 that fixes each brake plate 38 to the rotary head body 32, and is formed as an arc-shaped long hole 2h. The first metal plate P1 is By loosening the two bolts b2 and b2, the upper bolt b2 can be swung around the long hole 2h. By this swinging operation, the posture of the upright surface of the first metal plate P1 of the braking plate 38 can be adjusted in a range from diagonally upward to diagonally downward.

  On the upright surface of the first metal plate P1 of the brake plate 38, a second metal plate P2 integrated with two bolts b1 and b1 through long holes 1h and 1h which are long in the radial direction of the rotary head body 32. Comes with. The second metal plate P2 is attached in a state where a predetermined width is overlapped with the upright surface of the first metal plate P1, and the entire area of the upright surface of the first metal plate P1 is adjusted by adjusting the overlap margin. Can be changed (FIG. 4).

  A shielding plate 5 is attached between the guide roller device 10 and the rotary head main body 32 as shown in FIG. The shielding plate 5 serves to prevent the water sprayed from the spray nozzles 36A and 36B from rising upward, and has a diameter larger than the length of the spray nozzles 36A and 36B. It also serves to prevent the nozzles 36A and 36B from colliding with the strainer. In the present embodiment, since the rotary nozzle body 30 for cleaning is inclined by the rotation of the rotary head body 32, the injection nozzles 36A and 36B collide with the strainer because they are arranged right above the rotary head body 32. It works effectively so as not to. A pad 5a made of rubber, urethane, or the like is disposed on the outer periphery of the shielding plate 5 so as to be in contact with the inner surface of the deep well pipe so that no gap is formed with the shielding plate 5. Since such a shielding plate 5 is disposed between the outer peripheral frame F and the rotary head main body 32 and is disposed in the vicinity of the ejection nozzles 36A and 36B, from the ejection port for cleaning the ejection nozzles 36A and 36B. The inclination of the rotary head main body 32 due to the high-speed jetting can be suppressed to be small.

  The rotary nozzle device 30 having such a configuration uses a flange joint 3F provided at the upper end of the rotary shaft 31 directly or a necessary auxiliary device, for example, the inner wall surface of the well pipe 20 buried underground is pressurized. The guide roller device 10 and the like for cleaning can be assembled and used by connecting to a high pressure water source such as the high pressure pump car 3 (FIG. 5).

  The guide roller device 10 has a flange joint 11F adapted to the flange joint 3F of the rotary nozzle device 30 at the lower end portion, and the high pressure conduit 11 having a hose joint 15 for connecting the high pressure hose 2 to the upper end portion. (FIGS. 6 and 7). The high-pressure conduit 11 can be connected to the rotary head main body 32 using the flange joint 11 </ b> F, and can be connected to the high-pressure hose 2 using the hose joint 15.

  A sheath tube 12 is slidably fitted on the high-pressure conduit 11, and the sheath tube 12 is screwed into the high-pressure conduit 11 from the side surface of the sheath tube 12 by set screws b <b> 5 and b <b> 5. Can be fixed at any position. Base blocks 13 are projected in three directions at the upper end portion and the lower end portion of the sheath tube 12, respectively, and a swing arm 14 having a guide roller R1 at the distal end portion is attached to each base block 13. The three pairs of swing arms 14 corresponding to the top and bottom are connected by the link arm 17 and can swing in conjunction with each other.

  Stays 16 for locking the operation of each link arm 17 are attached to the three base blocks 13 on the upper side of the sheath tube 12, and the tips of the stays 16 are formed at a plurality of locations of the link arm 17. Screwed into the elongated holes 3h. The posture of the swing arm 14 is roughly positioned by the long hole 3h selected at this time, and can be precisely positioned by moving the tip of each stay 16 within the range of the selected long hole 3h. it can. Since the diameter of the circumscribed circle with respect to the guide roller R1 can be changed by controlling the posture of the swinging arm 15, the guide roller device 10 can be adapted to many types of well tubes 20 having different diameters.

  The rotary nozzle device 30 with the guide roller device 10 assembled therein is not lowered by draining the stored well water, but is lowered into the well pipe 20 as it is to supply high-pressure water from the high-pressure pump vehicle 3 which is a high-pressure water source. The inner wall surface of the tube 20 can be cleaned by water hammer. At this time, the guide roller device 10 can position the rotary nozzle device 30 at the center of the well rod 20 while tracing the inner wall surface of the well rod 20 in the vertical direction by the three pairs of guide rollers R1.

  The high-pressure water pumped from the high-pressure pump vehicle 3 at a predetermined water pressure reaches the rotating nozzle device 30 via the high-pressure hose 2 and the high-pressure conduit 11 of the guide roller device 10. The high-pressure water that has reached the rotary nozzle device 30 proceeds from the water guide hole 3A in the rotary shaft 31 of the rotary nozzle device 30 to the annular water channel 3C, and surrounds the rotary shaft 31 with high-pressure water in the annular water channel 3C. . The high-pressure water that has reached the annular water channel 3C passes through the water guide holes 3D and 3D of the pair of nozzle arms 33 and 33, and the first and second injection nozzles 36A and 36B attached to the nozzle arms 33 and 33, Are simultaneously injected (FIG. 8).

  Accordingly, the rotary head body 32 is subjected to reaction of the high-pressure water ejected from the four ejection nozzles 36. Among these, the reaction caused by the first injection nozzles 36A and 36A has the same strength and opposite directions, so that they cancel each other and do not affect the posture or behavior of the rotary head body 32 at all. The high-pressure water sprayed from the first spray nozzles 36 and 36 can apply a water hammer to the inner wall surface of the well pipe 20 from a substantially vertical direction.

  On the other hand, the reaction of the high-pressure water injected from the second injection nozzles 36B, 36B is a rotation determined by the product of the mounting distances L1, L1 from the center line CL of the rotary nozzle device 30 to the injection nozzle 36 and the reaction force. A moment is applied to the rotary head body 32. Therefore, a rotational force equal to the sum of rotational moments applied by the two second injection nozzles 36B and 36B is applied to the rotary head main body 32, and the rotary head main body 32 has an injection direction of high-pressure water to be injected. It rotates in the direction to escape in the opposite direction. The high-pressure water sprayed from the second spray nozzles 36B and 36B applies water hammer from the oblique direction to the inner wall surface of the well pipe 20, and removes scales and the like that cannot be removed only by water hammer from the orthogonal direction. Can do.

  When the rotary head main body 32 rotates, the water pressure from the high pressure water source enters the sliding gap ΔD between the rotary shaft 31 and the rotary head main body 32 via the annular water channel 3C, and forms a water film by the high pressure water. . Therefore, the rotary head body 32 is supported by a fluid floating bearing using a high-pressure water film, and can rotate stably even when used at a low rotation, and can uniformly clean the surroundings.

  Further, when the external water pressure PS1 around the rotary head main body 32 temporarily exceeds the internal water pressure PS2 in the rotary head main body 32 due to the uneven distribution of water pressure due to the turbulent flow generated in the well pipe 20 during cleaning. The seal ring 35 is displaced and deformed in such a direction as to close the end of the sliding gap ΔD due to the difference in water pressure between the inside and the outside, so that sewage containing external dust is prevented from entering the sliding gap ΔD. That is, the pair of seal rings 35 and 35 function as a kind of check valve.

  In order to stabilize the rotation operation of the rotary head main body 32, the long nozzle arm 33 is used, and the attachment distance L1 from the center CL of the rotary nozzle device 30 to the second injection nozzle 36B is set to be long. What is necessary is just to enlarge the value of the product of the reaction power by injection, and the attachment distance L1 to the 2nd injection nozzle 36B. However, in this case, the number of rotations of the rotary head body 32 decreases and is used for low speed.

  The rotational speed of the rotary head main body 32 is adjusted so that the jetting direction FF of the second jet nozzle 36B does not coincide with the rotational surface K of the nozzle arm 33 by loosening the lock nut 37 and turning the nozzle arm 33. For example, it can be adjusted by setting the injection angle θ1 between them (FIG. 9).

  The center line CL of the rotary nozzle device 30 and the rotation surface K are orthogonal to each other, and the reaction force due to the injection of the high-pressure water is applied to the nozzle arm 33 as a reaction force F opposite to the injection direction FF. Therefore, the component force F1 of the reaction force F in the direction of the rotation surface K is expressed by F1 = Fcosin θ1, and thus the rotation speed of the rotary head body 32 is reduced by setting the injection angle θ1. Adjusting the rotational speed of the rotary head main body 32 without reducing the water supply pressure, that is, without reducing the cleaning force by the first injection nozzle 36A that applies water hammer to the inner wall surface of the well pipe 20 from the vertical direction. Can do.

  However, by setting the injection angle θ1, the rotary head main body 32 receives a settling component force F2 that is a downward component force of the reaction force F. Further, when a reverse injection angle −θ1 is applied to the injection nozzle 36 across the rotation surface K, an upward rising component force −F2 is applied to the rotary head body 32, and the rotary nozzle device 30 is used. It shows a tendency to begin to surface by itself, and it may interfere with the cleaning work. This tendency increases as higher pressure high pressure water is used.

  Such upward or downward force acting on the rotary head main body 32 can be easily canceled by adjusting the posture of the brake plate 38. For example, when a downward force is applied to the rotary head main body 32 (FIG. 9), the rotary head is set downward with respect to the center line CL of the rotary nozzle device 30 (FIG. 10). An upward force can be applied to the main body 32 to correct the downward tendency of the rotary head main body 32 during use.

  That is, the relative water flow based on the rotation operation of the rotary head main body 32 collides with the braking plate 38 provided with the downward facing angle θ2 from the horizontal direction regardless of the posture of the upright surface P1 of the braking plate 38. At this time, the force by which the water flow pushes the upright surface P1 of the brake plate 38, that is, the braking force B that brakes the rotary head main body 32, is a component force B1 applied perpendicularly to the upright surface P1 and a downward component parallel to the upright surface P1. It can be decomposed into force B2. The reaction force B3 of the downward component force B2 is applied to the brake plate 38. Therefore, the vertical component B4 of the reaction force applied to the brake plate 38 becomes an upward force applied to the rotary head main body 32. The component force B2 is indicated by B2 = Bsin θ2, and the reaction force B3 is a component having the same magnitude and opposite direction as the component force B2, and indicated by B3 = −Bsin θ2. Further, the vertical component B4 of the reaction force B3 is represented by B4 = B3cosin θ2. However, since the posture adjustment range of the brake plate 32 is limited to a narrow range of the long hole 2h, the rotary head main body 32 may be considered to receive an upward force as it is the reaction force B3.

  In the description of the above embodiment, each nozzle arm 33 is provided with one first injection nozzle 36 </ b> A and one second injection nozzle 36 </ b> B, but a plurality of these are attached to one nozzle arm 33. You can also.

  Further, the mounting angle of the second injection nozzle 36 </ b> B can be changed within a range in which torque can be applied to the rotary head main body 32 within the rotation plane K of the nozzle arm 33. That is, it can be changed within a range in which torque can be applied to the rotary head body 32 in a direction different from the direction of the first injection nozzle 36A. Preferably, the rotational speed of the rotary head main body 32 can be adjusted by changing the horizontal mounting angle θ3 (FIG. 8). However, the adjustment in this case is a fixed adjustment.

  In the first embodiment, the embodiment in which the guide roller device 10 is assembled to the rotating nozzle device 30 and used for cleaning the well pipe 20 and the like in addition to the rotating nozzle device 30 has been described. In combination with a dedicated or general-purpose guide member or stabilizer device suitable for an object to be cleaned other than the guide roller device 10, it can be widely used for high-pressure water cleaning particularly where the worker cannot enter.

It is a perspective view which shows embodiment of the rotating nozzle apparatus which concerns on this invention. It is a longitudinal section showing an embodiment of a rotating nozzle device concerning the present invention. It is an expanded sectional view of an important section showing an embodiment of a rotating nozzle device concerning the present invention. It is a side view which shows embodiment of the rotating nozzle apparatus which concerns on this invention. It is use condition explanatory drawing of the rotary nozzle apparatus which concerns on this invention. It is a perspective view which attaches and shows a guide roller apparatus to the rotating nozzle apparatus which concerns on this invention. It is sectional drawing which assembles | attaches and shows a guide roller apparatus to the rotating nozzle apparatus which concerns on this invention. It is a top view which shows embodiment of the rotating nozzle apparatus which concerns on this invention. It is operation | movement explanatory drawing of the rotating nozzle apparatus which concerns on this invention. It is operation | movement explanatory drawing of the rotating nozzle apparatus which concerns on this invention.

Explanation of symbols

ΔD sliding gap,
F2 settling component force,
-F2 ascending force,
H1 shaft hole,
2h Through hole (arc-shaped long hole),
20 well pipes,
30 rotating nozzle device,
31 axis of rotation,
3A Rotating shaft water guide hole,
32 Rotating head body,
3C ring waterway,
33 Nozzle arm,
3D nozzle arm water guide hole,
35 Seal ring,
36A first injection nozzle,
36B second injection nozzle,
38 braking plate,
P1 first metal plate, P2 second metal plate,

Claims (5)

In a rotating nozzle device for cleaning used in water having a plurality of injection nozzles for injecting high-pressure water fed from a high-pressure water source and having a rotating head that rotates by reaction of the high-pressure water to be injected,
The rotary head has a rotary shaft formed with a water guide hole communicating with a high-pressure water source at the center, a rotary head main body having a shaft hole for receiving the rotary shaft at the center, and rotatably attached to the rotary shaft, and a water guide hole at the center A plurality of nozzle arms projecting in a radial direction on the rotary head body, and a first spray nozzle and a second spray nozzle attached to the nozzle arm,
The rotary head main body has an annular water channel that communicates with the water guide hole of the rotary shaft inside the shaft hole, and the water guide hole of the nozzle arm communicates with the water guide hole of the rotary shaft through the annular water channel, and the first injection The nozzle is attached to the tip of the nozzle arm in the same direction as the nozzle arm, and the second injection nozzle is attached in a direction to apply torque to the rotary head body by reaction of the high-pressure water to be injected. A rotating nozzle device for cleaning used in water.   2. The rotary nozzle device for cleaning used in water according to claim 1, wherein the nozzle arm is attached to the rotary head body so as to be capable of adjusting a rotation angle about the axis of the nozzle arm. In a rotating nozzle device for cleaning used in water having a plurality of injection nozzles for injecting high-pressure water fed from a high-pressure water source and having a rotating head that rotates by reaction of the high-pressure water to be injected,
A pair of seal rings made of elastic members are formed in the upper and lower set grooves by forming a set groove that opens outward at the upper and lower ends of the sliding gap set between the rotary head main body and the rotary shaft of the rotary head main body. Rotating nozzle device for cleaning used in water characterized by sealing foreign matter from outside and releasing internal water pressure as needed.   The rotary nozzle device for cleaning used in water according to claim 1 or 2, further comprising the seal ring according to claim 3.   The cleaning plate for use in water according to any one of claims 1 to 2, wherein a braking plate for increasing the rotational resistance of the rotary head body is provided on the rotary head body. Rotating nozzle device.

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