JP5154040B2 - High pressure water injection device - Google Patents

Description

  The present invention relates to a high-pressure water injection device that removes deposits using high-pressure water.

A high-pressure water injection device in the field of this technology is disclosed in, for example, Patent Document 1 below. The high-pressure water injection device described in this publication realizes a high water pressure shape different from the case where a nozzle head having a single injection port is used by a nozzle head having a plurality of injection ports for injecting high-pressure water. The high-pressure water spray width is expanded. By expanding the spraying width in this way, it is possible to remove the deposits efficiently.
JP-A-9-173916

  As a result of intensive studies, the inventors have newly found a technique that can change the shape of high-pressure water without changing the number of nozzle heads and the cross-sectional shape of the nozzle head.

  Then, this invention was made | formed in order to solve the above-mentioned subject, and it aims at providing the high pressure water injection apparatus which can change the shape of high pressure water, without changing an injection port.

  A high-pressure water injection device according to the present invention includes: an injection unit that injects high-pressure water; and a deformable member that is disposed on a track line of high-pressure water injected from the injection unit and changes the shape of the injected high-pressure water. It is characterized by.

  In this high-pressure water injection device, the shape of the high-pressure water injected from the injection unit is deformed by the deforming member, so the shape of the high-pressure water is changed without changing the number of injection ports or the cross-sectional shape of the injection unit. be able to.

  Moreover, the aspect by which the front-end | tip part at the side which a high pressure water advances among the deformation members is a spatula shape may be sufficient. In this case, the deposit can be peeled off at the spatula portion of the deformable member, and the deposit removal efficiency is increased.

  Moreover, the aspect further provided with the displacement means to which a deformation member is displaced to the position on the track line of high-pressure water and the position which deviated from the track line may be sufficient. In this case, it is possible to easily switch between using and not using the deformable member.

  In addition, a sensor unit that detects that the object for injecting the high-pressure water and the deformable member have a predetermined positional relationship is further provided, and high-pressure water can be injected from the injection unit based on the detection result of the sensor unit. The aspect which becomes may be sufficient. In this case, when the deposits are not removed, a situation in which high-pressure water is accidentally injected from the injection unit is significantly avoided.

  ADVANTAGE OF THE INVENTION According to this invention, the high pressure water injection apparatus which can deform | transform the shape of high pressure water without changing an injection port is provided.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments that are considered to be the best in carrying out the invention will be described in detail with reference to the accompanying drawings. In addition, the same code | symbol is attached | subjected about the same or equivalent element, and the description is abbreviate | omitted when description overlaps.

  FIG. 1 is a schematic configuration diagram showing a water jet hand gun 10 which is a high-pressure water injection device according to an embodiment of the present invention. This water jet hand gun 10 is for removing deposits such as paint adhering to a wall surface by jetting high pressure water, and a nozzle head 12 for jetting high pressure water, and a water pipe for feeding water to the nozzle head 12. 14 and grips 16 and 18 for the operator to hold the water pipe 14.

  The nozzle head 12 is provided with one jet port 12a having a circular cross section at the center of the cross section, and high pressure water is jetted linearly from the jet port 12a. The water supply pipe 14 is a long pipe-like member whose front end portion 14 a is connected to the nozzle head 12 and whose rear end portion 14 b is connected to the water supply hose 20. Then, the water supply pipe 14 sends the water supplied from the water supply hose 20 to the nozzle head 12.

  Of the grips 16 and 18 of the water jet handgun 10, one of the grips 18 on the rear end side is provided with an injection lever 22, and the operation of the injection lever 22 circulates the water flowing in the water supply pipe 14. You can start and stop.

  The nozzle head 12 is provided with a head cover 24. The head cover 24 is a cylindrical member that is attached to a position slightly retracted from the ejection port 12 a of the nozzle head 12 and covers substantially the entire periphery of the nozzle head 12. A metal scraper 26 is attached to the outer peripheral surface of the head cover 24.

  As shown in FIG. 2, the scraper 26 (deformation member) includes a pair of arm portions 28A and 28B that sandwich the above-described head cover 24, and the distal end 28a side of the arm portions 28A and 28B (ie, the side away from the head cover 24). It is comprised with the connection part 30 which connects arm part 28A, 28B.

  Here, the scraper 26 is attached to the head cover 24 by inserting the shaft 25 of the head cover 24 into the holes 29A and 29B of the rear end portions 28b of the arm portions 28A and 28B. Therefore, the scraper 26 can be rotated with respect to the axis A extending in the facing direction of the arm portions 28 </ b> A and 28 </ b> B and the shaft 25 of the head cover 24. Here, the position of the shaft 25 of the head cover 24 (that is, the mounting position of the arm portions 28A and 28B to the head cover 24) corresponds to the ejection port 12a of the nozzle head 12 (the vertical center position of the head cover 24 in FIG. 1). It has become. Accordingly, as shown in FIG. 1, the scraper 26 includes first and second arm portions 28 </ b> A and 28 </ b> B that extend along a linear trajectory line L (the one-dot chain line in FIG. 1) of high-pressure water ejected from the nozzle head 12. 1 and a second position (a two-dot chain line in FIG. 1) where the arm portions 28A and 28B extend in a direction intersecting the track line L.

  Further, the arm portions 28 </ b> A and 28 </ b> B of the scraper 26 are coupled to the head cover 24 via springs 27. One end of the spring 27 is attached to spring holes 31 </ b> A and 31 </ b> B provided near the center of the arm portions 28 </ b> A and 28 </ b> B, and the other end is attached to the outer peripheral portion of the head cover 24. The attachment position and length of the spring 27 are adjusted so that the urging force of the scraper 26 is minimized at the first position and the second position. Therefore, the spring 27 and the shaft 25 constitute a displacement means for displacing the scraper 26 between the first position and the second position. And by this displacement means, switching between when the scraper 26 is used and when it is not used can be easily performed. In addition, in order to fix the position of the scraper 26 firmly, a well-known locking mechanism can also be applied separately.

  The connecting portion 30 of the scraper 26 is a substantially fan-shaped spatula-shaped portion whose width increases toward the tip side, and the surface direction is inclined by a predetermined angle α from the extending direction of the arm portions 28A and 28B. . When the arm portions 28A and 28B are set at the first position along the track line L of the high pressure water, the high pressure water is applied to the connecting portion 30. Of the surfaces of the connecting portion 30, a three-dimensionally-shaped raised portion 32 is formed on the inclined surface 30 a to which high-pressure water is applied.

  The raised portion 32 is provided in a region on the rear end side of the connecting portion 30 in the region of the surface 30a and including a striking region S where high-pressure water is struck. As described above, since the cross section of the injection port 12a is circular, high water pressure is also injected into a line having a circular cross section, and the striking region S has a substantially elliptical shape. Further, in order for the jet of high-pressure water hitting the connecting portion 30 to be uniformly diffused and flow toward the tip (blade edge) 30b, the hitting region S is lowered toward the tip. It is designed to be located at the ridge 32 of the inclined portion. When the angle α is 30 degrees and the striking area S is a plane, the divergence angle of the high-pressure water is approximately 60 degrees.

  Therefore, when high-pressure water is jetted from the injection port 12 a, the high-pressure water collides with the connecting portion 30 of the scraper 26 disposed on the track line L and flows on the surface 30 a of the connecting portion 30. At this time, as shown in the satin portion of FIG. 2, the jet of high-pressure water is gradually expanded in width when flowing through the surface 30a, and the amount of water and the water pressure in the direction along the edge at the edge of the tip 30b. It becomes almost uniform. That is, the high-pressure water is changed by the scraper 26 from a line shape having a circular cross section to a wide plate shape.

  As described in detail above, in the water jet handgun 10 described above, the shape of the high-pressure water changes without changing the shape of the nozzle head 12. That is, the line-shaped (linear) high-pressure water ejected from the ejection port 12 a is changed to a plate-shaped (planar) high water pressure by the scraper 26. The scraper 26 realizes expansion of the spray width on the wall surface of the high-pressure water. As a result, the water jet hand gun 10 can efficiently remove deposits. Such expansion of the width of the jet of high-pressure water is more effectively realized by providing the raised portion 32 in the striking region S of the connecting portion 30. The water jet hand gun 10 can easily switch between using and not using the scraper 26 by adopting the displacement means, and when using the scraper 26, the injection range of high water pressure is significant. As a result, the working efficiency is greatly improved, and when the scraper 26 is not used, the high-pressure line-shaped high water density is used to remove or cut firmly adhered or thick deposits.

  Further, as shown in FIG. 3, the water jet hand gun 10 can remove the deposit F attached to the wall surface W by using the scraper 26. Therefore, the water jet hand gun 10 can be attached more efficiently by using the high pressure water jet together. The kimono F can be removed. That is, when removing the deposit F only by jetting high-pressure water, the deposit F remains in a striped pattern unless the moving speed of the target position of the high-pressure water is accurately controlled. However, by using the scraper 26 in combination, such a striped residue can be easily removed, and the amount of water used can be suppressed.

  Furthermore, since the high-pressure water is struck against the inclined surface portion of the raised portion 32 formed in the connecting portion 30, a technical effect that energy loss due to the collision is reduced as compared with the case where the high-pressure water is struck against the plane portion. In addition, since the scraper 26 vibrates when the high-pressure water collides with the scraper 26, the deposit F can be removed more efficiently than when the scraper 26 does not vibrate.

In addition, a brush 33 is provided on the back surface 30c of the connecting portion 30 of the scraper 26.
By rubbing the brush 33 against the wall surface W, it is possible to reliably remove the small leftover of the deposit F.

  Here, as shown in FIG. 4, the water jet handgun 10 described above is provided with a spiral spring 34 in the head cover 24, so that the head cover 24 can move back and forth relative to the nozzle head 12. ing. The spiral spring 34 is wound around the nozzle head 12 and urges the head cover 24 toward the distal end side (see FIG. 4A). Therefore, when the scraper 26 is pushed from the front side, the spiral spring 34 is compressed and the head cover 24 moves backward relative to the nozzle head 12 as shown in FIG.

  A sensor switch (sensor unit) 36 is attached to the water supply pipe 14 at a position where the head cover 24 is retracted, and the sensor switch 36 is pressed by the retreat of the head cover 24. Therefore, the contact of the scraper 26 can be detected by pressing the scraper 26 and pressing the sensor switch 36. That is, when the deposit F on the wall surface W is removed, the scraper 26 is pressed against an object such as a wall from which high-pressure water is jetted, that is, the object and the scraper are in a predetermined positional relationship (a predetermined separation distance). It can be detected by the sensor switch 36.

  The sensor switch 36 is linked with the high-pressure water injection control. For example, high-pressure water is not injected by pulling the injection lever 22 except when the sensor switch 36 is turned on by a control circuit or a control mechanism (not shown). Interlock is assembled.

  That is, when removing the deposit F, the operator cannot turn on the sensor switch 36 and cannot inject high-pressure water unless the scraper 26 is pressed against the wall surface W. Therefore, when the deposit F is not removed, a situation in which high pressure water is erroneously injected from the nozzle head 12 is significantly avoided, and various accidents due to erroneous injection of high pressure water can be prevented. . The sensor unit is not limited to a contact type sensor (for example, using a conductive rubber or a piezoelectric element), and the object and the scraper have a predetermined positional relationship (for example, a separation distance or a relative position). As long as it can detect this, a non-contact type sensor (for example, one using light, sound, magnetism, capacitance, etc.) may be used.

  Further, according to the mechanism of the scraper 26 and the sensor switch 36 described above, when removing the deposit F, the distance between the injection port 12a and the wall surface W is always kept constant. Therefore, by adjusting the arrangement relationship between the scraper 26 and the sensor switch 36, the deposit F can be removed at an optimal separation distance between the injection port 12a and the wall surface W. This optimum distance is, for example, 20 cm, and this numerical value changes according to the pressure of high-pressure water ejected from the ejection port 12a.

  Note that the shape of the scraper 26 is not limited to the shape described above, and may be, for example, a shape as shown in FIGS.

  Like the scraper 26 shown in FIG. 2, the scraper 26A shown in FIG. 5 is provided with a three-dimensionally shaped raised portion 32A on its surface 30a. In the embodiment in which the scraper 26A is used, the high-pressure water striking region S is set so as to be positioned approximately at the center of the connecting portion 30A. And 32 A of protruding parts are formed in the approximate center part of the surface area | region of 30 A of connection parts so that the striking area | region S may be located in the top part.

  Also in such a scraper 26A, the width of the jet of high-pressure water injected from the injection port 12a is as shown in the satin portion of FIG. 5 when it collides with the raised portion 32A of the connecting portion 30A and flows through the surface 30a. To be expanded. Thereby, the line-shaped high-pressure water ejected from the ejection port 12a of the nozzle head 12 is changed to a plate-shaped high water pressure by the scraper 26A. Further, in the scraper 26A, since the striking region S is located closer to the tip portion 30b than the striking region S of the scraper 26, friction loss when high-pressure water flows through the connecting portion surface 30a is significantly reduced. Has been. Accordingly, the scraper 26 </ b> A can remove deposits with higher energy efficiency than the scraper 26. The scraper 26 and the scraper 26A described above are suitable when the deposit F is relatively soft and it is desired to remove the deposit uniformly.

  The scraper 26B shown in FIG. 6 is provided with a plurality of grooves 40 on the surface 30a from the rear end portion toward the front end portion. These grooves 40 extend from the striking region S toward the tip portion, and are designed so that the interval gradually expands toward the tip portion side. Also in such a scraper 26B, the width of the jet of high-pressure water injected from the injection port 12a is expanded when flowing through the surface 30a, as shown in the satin portion of FIG. The scraper 26B is suitable when the deposit F is hard and requires a large cutting force.

  The present invention is not limited to the above embodiment, and various modifications are possible. For example, the high-pressure water injection device is not limited to a water jet hand gun, and may be other devices that can inject high-pressure water. For example, a plurality of injection ports of the nozzle head may be provided, and the cross-sectional shape thereof may be an elliptical cross section or a polygonal cross section. Further, the injection trajectory of the high-pressure water is not limited to a linear shape, and may be a parabolic injection trajectory, for example. Furthermore, the deformation member does not necessarily have a spatula shape as a whole, and at least the tip portion on the side where the high-pressure water proceeds has only to be a spatula shape.

  Further, the raised portions 32 and 32A do not necessarily have to be integrally formed with the connecting portions 30 and 30A, and may be made separate and appropriately removable. In this case, when the raised portion is worn by the impact force of high-pressure water, only the raised portion can be replaced.

1 is a schematic configuration diagram illustrating a water jet handgun according to an embodiment of the present invention. It is the perspective view which showed the scraper of FIG. It is the schematic diagram which showed a mode that the deposit | attachment was removed using the water jet handgun of FIG. 2A and 2B are cross-sectional views showing the internal structure of the head cover 24 of FIG. 1, in which FIG. 1A shows a state where the scraper is not pressed, and FIG. 2B shows a state where the scraper is pressed. It is the figure which showed the scraper of a shape different from the scraper shown in FIG. It is the figure which showed the scraper of a shape different from the scraper shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Water jet hand gun, 12 ... Nozzle head, 24 ... Head cover, 25 ... Shaft, 26, 26A, 26B ... Scraper, 27 ... Spring, 30 ... Connection part, 32, 32A ... Raised part, 36 ... Sensor switch, F ... Deposits, W ... Wall surface.

Claims (6)

A high-pressure water injection device that removes deposits adhering to a wall surface by spraying high-pressure water on the deposits ,
An injection unit for injecting high-pressure water;
A high-pressure water injection device, comprising: a deformable member that is disposed on a track line of high-pressure water that is injected from the injection unit, changes the shape of the injected high-pressure water, and peels off deposits attached to the wall surface.   The high-pressure water injection device according to claim 1, wherein at least a tip of the deformable member on a side where the high-pressure water travels has a spatula shape.   3. The high-pressure water injection apparatus according to claim 1, further comprising a displacement unit that displaces the deforming member to a position on the track line and a position deviated from the track line.   A sensor unit for detecting that the object for injecting the high-pressure water and the deformable member are in a predetermined positional relationship is further provided, and the injection of the high-pressure water from the injection unit based on the detection result of the sensor unit The high-pressure water-injection device according to any one of claims 1 to 3, wherein Further comprising a raised portion formed on the surface of the deformable member,
The high-pressure water injection device according to any one of claims 1 to 4, wherein the high-pressure water is applied to the raised portion. A plurality of grooves formed on the surface of the deformable member;
The high pressure water injection device according to any one of claims 1 to 4, wherein the high pressure water is applied to the plurality of grooves.

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