JP2015218509A - Repair method of snow extinguishing nozzle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repair method of a snow extinguishing nozzle capable of reducing a construction period and costs.SOLUTION: A repair method of an existing snow extinguishing nozzle comprises an existing nozzle body 2 having a water conduction passage 5A and an existing valve provided in an upper part of the water conduction passage 5A. After removing the existing valve from an upper part of the water conduction passage 5A, the upper part of the water conduction passage 5A is diametrically expanded, and since a new valve 21 is installed in this diametrically expanded water conduction passage 5A, repair can be executed only by replacing the existing valve 3 with the new valve 21, so that a construction period is short, and the new valve can be inexpensively constructed. The upper part of the water conduction passage 5A is diametrically expanded by a drill device 51 being cutting means, and the new valve 21 is pressed in this diametrically expanded water conduction passage 5A. Since an irregular-shaped male screw part 29 is provided on an outer surface of the new valve 21, slipping-out of thee new valve 21 pressed in by the male screw part 29 is prevented.

Description

  The present invention relates to a method for repairing a snow removal nozzle for repairing a buried snow removal nozzle.

  Conventionally, when a snow removal nozzle embedded in a road surface such as concrete becomes defective, it has been very troublesome to replace it with a new snow removal nozzle.

  Considering such problems, the road layer around the snow-dissipating nozzle to be removed is cut with a cylindrical bit, and the cylindrical groove is dug down to the vicinity of the bottom plate of the snow-dissolving nozzle. Insert a gripping body with locking claws projecting on the side, and pull the gripping body up while applying a clamping gripping force to the road layer cylinder inside the cylindrical groove to cut the road layer cylinder. How to replace the snow removal nozzle by attaching a new snow removal nozzle to the riser pipe remaining in the cylindrical recess after the road layer cylinder is cut and extracted after the snow removal nozzle is buried in the road layer cylinder ( For example, Patent Document 1) has been proposed.

Japanese Patent Publication No. 7-57929

  In Patent Document 1, it is possible to easily replace a defective snow-dissipating nozzle with a new snow-dissipating nozzle, and it is possible to easily perform the replacement operation.

  However, in the replacement method disclosed in Patent Document 1, the road layer around the snow-discharging nozzle is cut with a cylindrical bit, the road-layer cylinder is cut, and the road-layer cylinder is left standing in the road-layer cylinder with the snow-dissipating nozzle embedded therein. A new snow-dissipating nozzle is attached to the riser pipe remaining in the cylindrical recess where the road layer cylinder has been cut and extracted, and the road layer material is filled in the cylindrical recess. There is a problem of increasing costs.

  The problem to be solved is to provide a method for repairing a snow-melting nozzle that can reduce the construction period and cost.

  The invention of claim 1 is a method for repairing an existing snow-dissipating nozzle comprising an existing nozzle body having a water passage and an existing valve provided at the upper portion of the water passage, and After the existing valve is removed, the diameter of the upper part of the water passage is expanded, and a new valve is attached to the expanded water passage.

  The invention of claim 2 is characterized in that the diameter of the upper part of the water passage is expanded by a cutting means, and the new valve is press-fitted into the expanded water passage.

  The invention of claim 3 is characterized in that a concave-convex retaining portion is provided on the outer surface of the new valve.

  According to a fourth aspect of the present invention, a water pipe is connected to a water pipe, the water pipe is inserted into a connection hole of the nozzle body, the water pipe forms the water passage, and an upper portion of the water pipe is removed. Then, the diameter of the water passage is enlarged, and the new valve is attached to the connection hole in the portion where the water pipe is removed.

  According to the invention of claim 1, since the existing valve can be repaired only by replacing it with a new nozzle, the construction period is short and the construction can be performed at low cost.

  According to invention of Claim 2, the old part of a water flow path can be removed by a cutting means, and a new valve can be press-fitted and fixed to this part.

  According to the invention of claim 3, the new valve press-fitted by the retaining portion is prevented from being detached.

  According to the invention of claim 4, the upper part of the water pipe that has been connected to the existing valve is removed, and a new valve is attached to this part, so that the valve can be replaced and repaired.

It is sectional drawing of the snow-melting nozzle which attached the novel valve | bulb which shows Example 1 of this invention. It is sectional drawing of a novel valve | bulb same as the above. FIG. 4A is a cross-sectional view for explaining how to use the cutting means. FIG. 4A shows a state in which a jig is attached to the drill body, and FIG. 4B shows that the tip of the drill body protrudes from the stopper by an enlarged dimension. FIG. 4C shows the state of diameter expansion work. FIG. 4A is a plan view of the jig body, and FIG. 4B is a front view of the driving jig. FIG. 5A is a sectional view of the repair method, FIG. 5A shows an operation for removing an existing nozzle body, FIG. 5B shows an enlargement operation, and FIG. 5C shows a driving operation for a valve case of a new valve. . FIG. 6A is a sectional view of the repair work, FIG. 6A is a valve body mounting work, FIG. 6B is a state in which a water amount measuring device is attached, and FIG. 6C is a snow-dissipating nozzle with a new valve replaced. Indicates. It is a sectional view of an existing snow extinguishing nozzle.

  Preferred embodiments of the present invention will be described with reference to the accompanying drawings. In addition, the Example demonstrated below does not limit the content of this invention described in the claim. In addition, all of the configurations described below are not necessarily essential requirements of the present invention.

  FIGS. 1-7 has shown Example 1, As shown in FIG. 7, the existing snow extinguishing nozzle 1 is provided with the nozzle main body 2 and the existing valve 3, The said nozzle main body 2 and the existing valve 3 are the same. The nozzle body 2 is formed of a metal material such as stainless steel or cast iron, and is buried in the lower portion of the road surface 4 with its upper surface exposed.

  The nozzle body 2 integrally includes a connecting cylinder portion 6 connected to the water pipe 5 and a large diameter portion 7 provided on the upper portion of the connecting cylinder portion 6. The water pipe 5 is made of synthetic resin or the like, and a plurality of water pipes 5 are provided at intervals in the water pipe 8 embedded in the ground, and the water pipe 5 is inserted and connected to the connection hole 6A in the connection cylinder portion 6, A water passage 5 </ b> A is constituted by the inner surface of the water pipe 5.

  Further, the nozzle body 2 is provided with a plurality of anchor portions 9, 9. This anchor portion 9 is formed by bending a steel round bar or the like, connecting the upper portion 9A and the lower portion 9B in the horizontal direction by the vertical portion 9C, and fixing the upper portion 9A to the lower surface of the large diameter portion 7 by welding or the like. doing.

  A flat ring-shaped flat surface 11 is formed at the center of the upper surface of the large-diameter portion 7, and a tapered surface 12 is formed around the flat surface 11. The tapered surface 12 has an angle with respect to the horizontal. It is about 5 to 15 degrees. A valve 3 is fitted to the upper part of the water passage 5A. The valve 3 is a cylindrical valve body 14 fitted to the upper part of the water passage 5A, and a flange portion 15 provided on the upper part of the valve body 14. And a watering passage 16 communicating with the water passage 5A is provided inside the valve body 14, and the water sent from the water supply pipe 8 is larger in diameter than the flange portion 15 from the watering passage 16. Water is sprayed outside through the space between the parts 7.

  As shown in FIGS. 1 and 2, the new valve 21 made of metal includes a valve case 22 and a valve body 23. The valve case 22 includes a cylindrical portion 24 having a valve body 23 built in a lower end portion thereof, and a flange portion 25 that protrudes in a horizontal direction at the upper end portion of the cylindrical portion 24 and contacts the large diameter portion 7. A plurality of sprinkling groove portions 26 are formed radially on the lower surface of the portion 25. In addition, a tapered portion 27 that is reduced downward is formed in the lower portion of the cylindrical portion 24.

  Further, a large-diameter portion 28 is formed in the center of the cylindrical portion 24. The large-diameter portion 28 is formed to have a larger diameter than the upper and lower portions, and the large-diameter portion 28 is a male screw portion that is an uneven-shaped retaining portion. 29 is formed. An outer peripheral surface portion 30 having a diameter smaller than that of the large diameter portion 28 is formed on the male screw portion 29, and a hole 31 is formed in the outer peripheral surface portion 30. Further, a female screw portion 32 is formed inside the cylindrical portion 24.

  The valve body 23 has a cylindrical shape, the lower part communicates with the water passage 5A, and the upper part is closed by a lid part 33. A male screw part 34 is formed on the outer periphery of the valve main body 23, and the male screw part 34 is screwed into the female screw part 32 so that the valve main body 23 is attached to the valve case 22. A hole 35 is formed corresponding to the hole 31. Further, a concave groove portion 36 is provided around the upper outer periphery of the valve main body 23, and an O-ring 37 serving as a water stop member is detachably attached to the concave groove portion 36. Further, a tool engaging portion 38 such as a minus groove is formed in the upper portion of the valve body 23.

  Therefore, the amount of water spray can be adjusted by screwing the valve body 23 into the valve case 22, aligning the hole 31 and the hole 35, and adjusting the communication area between the hole 31 and the hole 35. Further, the hole 31 of the valve case 22 can be completely closed by the valve body 23 to stop the water.

  In addition, there is a gap communicating with the hole 31 between the connection hole 6A of the connection tube portion 6 and the outer peripheral surface portion 30, and the lower surface of the flange portion 25 is in contact with the upper surface of the large diameter portion 7 to form the water spray groove portion 26. The lower part is closed, and the water that has passed through the holes 31 flows from the gaps to the four water sprinkling grooves 26 and is sprinkled from the outer ends of the sprinkling grooves 26. At this time, the water is sprinkled obliquely upward by the tapered surface 12.

  In FIG. 5, reference numeral 41 denotes a detaching tool for removing the existing valve from the existing snow-dissipating nozzle 1. And an abutting portion 43 that abuts on the upper surface of the large-diameter portion 7 is provided in the distal end portion 44, and an operating portion 45 in the intersecting direction is integrally provided at the distal end portion 44.

  A drill device 51 is exemplified as a cutting means for expanding the diameter of the water passage 5A. The drill device 51 includes a drill body 52 and a jig 53 that is externally mounted on the drill body 52. In addition, by removing the water pipe 5, the connection hole 6A of the connection cylinder portion 6 is exposed, and the diameter of the water passage 5A is expanded. Further, the connection hole 6A of the connection cylinder portion 6 may be cut and enlarged.

  The jig 53 includes a cylindrical stopper 54 that is externally mounted on the drill main body 52, and fixing means 55 that fixes the stopper 54 to the drill main body 52. The fixing means 55 includes a plurality of penetrating holes formed in the stopper 54. The female screw portion 55A and a bolt 55B screwed to the female screw portion 55A. The stopper 55 is positioned and fixed to the drill body 52 by screwing the bolt 55B into the female screw portion 55A and bringing the tip of the bolt 55B into contact with the drill body 52. And the dimension of the front-end | tip of the drill main body 52 and the front-end | tip of the stopper 54 is set according to the diameter expansion dimension H of the diameter expansion part of the said water flow path 5A.

  In this case, a set gauge 57 is used as a means for setting the diameter expansion dimension H. The set gauge 57 has a cylindrical insertion portion 58 that inserts the tip of the drill body 52, and a lid-like contact portion 59 provided at the tip of the insertion portion 58. The dimension up to the base end of the insertion part 58 is the diameter expansion dimension H. Therefore, as shown in FIG. 3A, the drill body 52 is inserted into the stopper 54, the tip of the drill body 52 is inserted into the set gauge 57, and the tip of the drill body 52 is brought into contact with the contact portion 59. In this state, the stopper 54 is brought into contact with the other end portion of the insertion portion 58, and the stopper 54 is fixed to the drill body 52 in this state. Thereafter, as shown in FIG. 3B, the set gauge 57 is removed from the drill main body 52, so that the drill main body 52 protrudes from the tip of the stopper 54 by the diameter expansion dimension H.

  Further, a driving jig 61 for attaching the new valve 21 is used. The driving jig 61 is made of a hard material such as metal, and a jig main body 62 with which a tool can be engaged, a thick collar 63 provided at the tip of the jig main body 62, and the thick collar 63 And a valve engaging portion 64 provided at the tip of the same. The jig body 62 has a hexagonal column shape, and can be rotated by engaging a tool in the same manner as the head of the bolt. The valve engaging portion 64 is a male screw and can be screwed into the female screw portion 32 of the valve main body 23. The base end of the jig body 62 is a striking surface.

  Therefore, the valve engaging portion 64 is screwed into the female screw portion 32 of the valve main body 23, the tapered portion 27 of the new valve 21 is aligned with the expanded water passage 5A, and the striking surface of the jig main body 62 is placed with a hammer or the like. Strike and press-fit the valve case 22 of the new valve 21 into the water passage 5A. In this case, the large diameter portion 28 of the valve case 22 is press-fitted until it comes into contact with the upper surface of the large diameter portion 7 of the existing nozzle body 2. Thereafter, the jig main body 62 is rotated in the anti-screwing direction by a tool, and the valve engaging portion 64 is extracted from the female screw portion 32 of the valve main body 23.

  By doing so, since the new valve 21 is not directly hit, the new valve 21 can be easily attached to the existing nozzle body 2 without damaging the new valve 21. Further, in the mounted state, the new valve 21 can be securely mounted by the male screw portion 29 which is a concave and convex retaining portion.

  In FIG. 6A, reference numeral 71 denotes a water amount measuring device which is used by being mounted on the upper surface of the snow extinguishing nozzle 1.

  Next, a method for repairing the existing snow extinguishing nozzle 1 will be described in detail. When the water spraying of the existing snow-discharging nozzle 1 shown in FIG. 7 becomes defective, the existing nozzle body 2 is removed using the removal tool 41 as shown in FIG. Further, as shown in FIG. 3, a stopper 54 is externally fixed to the drill body 52 in advance, and the tip of the drill body 52 protrudes from the tip of the stopper 54 by the diameter expansion dimension H of the enlarged diameter portion.

  Next, as shown in FIG. 5 (B), the upper part of the water flow pipe 5 is cut and removed by the drill main body 52, and the diameter of the upper part of the water flow path 5A is expanded. In this case, the upper part of the water passage 5 </ b> A is constituted by the connection hole 6 </ b> A of the connection cylinder part 6. Further, as shown in FIG. 3C, when the drill body 52 is inserted into the water pipe 5, the tip of the stopper 54 comes into contact with the upper surface of the large-diameter portion 7, and the water flow path corresponds to the diameter expansion dimension H. 5A is expanded.

  Further, the new valve 21 is obtained by removing the valve body 23 from the valve case 22 and screwing the valve engaging portion 64 of the driving jig 61 into the female screw portion 32 of the valve case 22 so as to be attached to the lower surface of the thick wall portion 63. The flange portion 25 is brought into contact. In this way, even if the jig body 62 is hit, force is applied to the entire flange 25 from the bottom surface of the thick flange 63, so that force is concentrated on a part of the valve case 22. There is no. In this case, it is preferable that the diameter of the thick collar portion 63 is equal to or larger than the diameter of the collar portion 25 and the diameter of the thick collar portion 63 is equal to or smaller than the diameter of the flat surface 11.

  Then, as shown in FIG. 5 (C), the lower tapered portion 27 is inserted into the expanded water passage 5A, the jig body 62 is pushed down, or the jig body 62 is hit, so that The tube portion 24 of the valve case 22 is press-fitted into the water passage 5A until 25 comes into contact with the upper surface of the large diameter portion 7. Thus, the valve case 22 can be prevented from coming off due to the retaining effect of the male screw portion 29 of the cylindrical portion 24.

  Thereafter, as shown in FIG. 6A, the valve body 23 is screwed onto the valve case 22 to assemble the new valve 21. Next, as shown in FIG. 6 (B), the amount of water spray is measured using a water amount measuring device 71, and the valve body 23 is rotated as described above to adjust the amount of water according to the positions of the holes 31 and 35. . As a result, as shown in FIG. 6C, a snow extinguishing nozzle having a water amount adjusted and a new valve 21 mounted on the nozzle body 2 is obtained.

  As described above, in this embodiment, in correspondence with the first aspect, the existing snow eliminating nozzle 1 including the existing nozzle body 2 having the water passage 5A and the existing valve 3 provided on the upper portion of the water passage 5A is provided. In this repair method, after the existing valve 3 is removed from the upper part of the water passage 5A, the upper part of the water passage 5A is expanded, and a new valve 21 is attached to the expanded water passage 5A. Since it can be repaired by simply replacing it with the valve 21, the construction period is short and the construction can be made inexpensively.

  In this way, in this embodiment, the upper portion of the water passage 5A is expanded by the drill device 51 serving as cutting means, and the new valve 21 is press-fitted into the expanded water passage 5A. The old portion of the water passage 5A can be removed by the drill device 51 as cutting means, and the new valve 21 can be press-fitted and fixed to this portion.

  Further, in this embodiment, in correspondence with the third aspect, since the male screw portion 29 which is a concave and convex portion is provided on the outer surface of the new valve 21, the removal of the new valve 21 press-fitted by the retaining portion is provided. A stop is made.

  Thus, in this embodiment, in correspondence with claim 4, the water pipe 5 is connected to the water pipe 8, the water pipe 5 is inserted into the connection hole 6A of the nozzle body 2, and the water pipe 5 5A is configured, the upper part of the water pipe 5 is removed to expand the diameter of the water passage 5A, and the new valve 21 is attached to the connection hole 6A of the part from which the water pipe 5 is removed, so the existing valve 3 is connected. By removing the upper part of the water pipe 5 and attaching a new valve 21 to this part, the valve can be replaced and repaired.

  Further, as an effect of the embodiment, the water pipe 5 is made of a synthetic resin, so that the diameter expansion work is easy. Furthermore, since a plurality of water sprinkling groove portions 26 are formed radially on the lower surface of the flange portion 25 and the lower portion of the water sprinkling groove portion 26 is in contact with the upper surface of the large diameter portion 7, the structure of the water sprinkling portion is simplified. Further, the cutting dimensions by the drill body 52 can be easily set by the jig 53. Further, the new valve 21 can be easily attached by the driving jig 61.

  Furthermore, by using the drill main body 52, the common new valve 21 can be attached by expanding the diameter of the water passage 5A to the existing nozzle main body 2 having different connection hole 6A dimensions. Specifically, when the diameter of the cylinder part 24 corresponds to the connection hole 6A, the water pipe 5 is cut, and when the diameter of the cylinder part 24 is larger than the connection hole 6A, the connection hole 6A is cut to expand the diameter. As a result, a common new valve 21 can be used. In addition, the conventional existing valve 3 could not adjust the amount of water. However, since the new valve 21 has a water amount adjusting mechanism including the valve body 23 and the like, the amount of water spray can be adjusted by replacing with the new valve 21. Can do. In addition, a water passage 24A is provided inside the cylindrical portion 24 of the valve case 22, and the new valve 21 cannot be achieved by extracting the valve body 23 from the valve case 22 using the tool engaging portion 38. The water passage 5A and the water passage 24A of the valve case 22 can be cleaned. The male screw portion 34 of the valve body 23 is screwed into the female screw portion 32 formed in the water passage 24A, and the upper portion of the water passage 24A is closed by the lid portion 33 of the valve main body 23.

  In addition, this invention is not limited to the above Example, A various deformation | transformation implementation is possible within the range of the summary of invention. For example, the retaining portion is not limited to the male screw portion, and various types can be used as long as the concave portion and the convex portion are arranged in the length direction. Moreover, you may attach a new valve | bulb to the connection hole which expanded the diameter of the connection hole, and was expanded in diameter.

DESCRIPTION OF SYMBOLS 1 Existing snow extinguishing nozzle 2 Nozzle body 3 Existing valve 5 Water pipe 5A Water passage 6A Connection hole 8 Water pipe
21 New valve
22 Valve case
23 Valve body
29 Male screw part (prevention part)
51 Drilling device (cutting means)

Claims (4)

A method for repairing an existing snow-dissipating nozzle comprising an existing nozzle body having a water passage and an existing valve provided on the upper portion of the water passage, and after removing the existing valve from the upper portion of the water passage, A method for repairing a snow-melting nozzle, wherein the diameter of the upper part of the water passage is expanded and a new valve is attached to the expanded water passage. 2. The method for repairing a snow extinguishing nozzle according to claim 1, wherein an upper portion of the water passage is expanded by a cutting means, and the new valve is press-fitted into the expanded water passage. The method for repairing a snow extinguishing nozzle according to claim 2, wherein a concave-convex retaining portion is provided on an outer surface of the new valve. A water pipe is connected to the water pipe, the water pipe is inserted into a connection hole of the nozzle body, and the water passage is constituted by the water pipe,
The upper part of the said water pipe is removed, the said water channel is expanded, and the said new valve is attached to the said connection hole of the part which removed the said water pipe. Repair method for snow-melting nozzle.

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