JP6458993B2 - Method for cleaning snowpipe and obturator used therefor - Google Patents

Description

  INDUSTRIAL APPLICABILITY The present invention relates to a method for cleaning a snowpipe and a closure used therefor, in particular, a method for cleaning a snowpipe installed so as to blow liquid from the surface of the road in order to melt the snow on the road in a snowy area It relates to an obturator.

  In snowy areas, water is sprayed from the snowpipe to melt the snow on the road. The snowplow pipe is provided with a groove in the road and disposed at the groove bottom, and a snowplow nozzle is connected to the tip of the branch pipe branched upward at a predetermined interval from the snowpipe.

  The spray nozzle (small hole) of the snow extinguishing nozzle is set so as to be exposed on the road surface. For example, ground water flows through the snow extinguishing pipe, and the ground water is sprayed from the snow extinguishing nozzle onto the road surface (for example, , See Patent Document 1). There are various types of snow extinguishing nozzles, but the amount of water sprayed can be adjusted by a specific blocking means (for example, Patent Document 2).

  FIG. 4 shows a schematic cross-section of the snow extinguishing nozzle. An intermediate member 40 and an opening / closing means 42 are provided in the main body 12 b of the snow eliminating nozzle 12. The small hole (sprinkling port) 12a is formed on the top surface of the main body 12b and sprays water on the road at a predetermined angle. The cylindrical intermediate member 40 makes it possible to adjust the amount of water sprayed by the closing means 42. The closing means 42 rotates within the cylindrical intermediate member 40, and the amount of water flowing into the small hole 12a is adjusted. It can be done. The closing means 42 is rotated using a concave groove 42 b formed at the top of the closing means 42. A recess 40b is formed in the intermediate member 40 above the closing means 42, and the canopy 44 is covered on the recess 40b. The arrow M indicates the flow of water flowing through the openings 40a and 42a. The opening 12d is an opening into which the branch pipe 10a of the snow extinguishing pipe 10 is inserted.

  On the other hand, an ice pig pipe cleaning method is known as a method for cleaning pipes such as water pipes and sewer pipes (Non-Patent Document 1). This is a method of injecting a sherbet-like fluid having ice particles and water as a cleaning medium in a pipe, forming an ice pig in the pipe, and moving the formed ice pig in the pipe by a water flow. The ispig scrapes off the deposits in the pipe line, and takes in and moves the contaminants to clean the pipe line.

Japanese Patent Laid-Open No. 2007-297885 JP 2011-169011 A

“Ice Pig Pipe Cleaning Method”, Ice Pig Study Group (http://www.icepig.org/)

  In the snowpipe, ground water or the like flows to sprinkle on the snow as described above. For many years, sand, etc., accumulates in the snowpipe and rust occurs on the pipe wall. In such a situation, the snow-dissipating nozzle is clogged with sand, rust, or the like, resulting in a problem that water cannot be sprayed. Therefore, it is desirable to clean the snowpipe periodically, but since the snowpipe has a small diameter and there is no effective cleaning method, it is often left as it is.

  When applying the above ice pig tube cleaning method to a snowpipe, a sherbet-like fluid containing ice particles and water as a cleaning medium will flow out and be washed unless the small hole (sprinkling hole) of the snowplow nozzle is closed. Cannot be done. In addition, since the snow-discharging nozzle is exposed on the road surface, there are some which are stepped on by a vehicle or the like while being used for many years and cannot be blocked by the inherent blocking means of the snow-discharging nozzle. When trying to apply the ice pig tube cleaning method to the snowpipe, there was a situation where it could not be blocked by the inherent blocking means as described above, and there was no means to easily block the small hole of the snowpipe nozzle. The cleaning method was not applied to the snowpipe.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for cleaning a snowpipe that makes it possible to apply the ice pig tube cleaning method to the snowpipe and a closure used therefor. It is in.

  In order to achieve the above object, a method for cleaning a snow extinguishing tube according to claim 1 is provided with a small hole for blowing out liquid at a predetermined interval, and the snow in a neighboring area is blown out by blowing out the liquid from the small hole. In the method for cleaning a snowpipe that melts the snowpipe, a closing step for closing each small hole existing in the region to be cleaned of the snowpipe, and a region of the snowpipe after the closing step from one end thereof And a cleaning medium introduction / discharge step in which a sherbet-shaped cleaning medium containing ice particles and cleaning water is introduced under pressure and discharged from the other end side.

  According to this method, the small hole of the snowpipe is closed in the closing step, and then the sherbet-like cleaning body is pressurized and introduced from one end side of the snowpipe and discharged from the other end side. Since the small hole of the snowpipe is blocked, the sherbet-shaped cleaning medium containing the ice particles and the washing water introduced into the snowpipe under pressure does not flow out of the small hole for water sprinkling. The inside of the snowpipe can be moved from one end side to the other end side. Thereby, the snowpipe can be cleaned with a sherbet-shaped cleaning medium.

  The snowpipe cleaning method according to claim 2 is the snowpipe cleaning method according to claim 1, wherein the closing step can be closed by a specific closing means provided in advance in each small hole. For small holes, the small holes are closed by the specific closing means, and for the small holes that cannot be closed by the specific closing means, the small holes are closed by an externally prepared external obturator. And

  In this method, when the small hole can be closed by the specific closing means, the specific closing means is used, and when the small hole cannot be closed by the specific closing means, a separate closing tool is prepared. Therefore, it is only necessary to prepare a minimum number of obturators, and the obstruction work in the obstruction process can be shortened.

  In order to achieve the above object, the obturator according to claim 3 is directed to a snowpipe installed to blow out the liquid from the surface of the ground in order to melt the snow on the road in the snowy area. In the obturator used for applying the snowpipe cleaning method, a plug member for individually closing each small hole in the area to be cleaned of the snowpipe, and the plug member in the closed state And a weight body that is installed so as to maintain a closed state of the plug member by its weight.

  With this configuration, the small hole of the snowpipe is closed by the plug member, and then the plug-like body is maintained by the weight body. Therefore, the small hole is easily closed by the plug member and the weight body, and it is possible to prevent the cleaning medium from flowing out of the small hole in the cleaning medium introduction / discharge process. In addition, the obturator can be easily removed after the cleaning operation is completed.

  The obturator according to claim 4 is a method of cleaning a snow extinguisher according to claim 2 for a snow extinguisher installed so as to blow out the liquid from the surface of the ground in order to melt snow on a road in a snowy area. In the obturator used for application, each of the small holes is formed in a nozzle member installed on a ground surface portion, a bolt member fixed to the nozzle member, and a state fixed to the bolt member And a closing lid for closing each small hole.

  Each small hole is formed in the nozzle member, and a concave portion is formed in the central portion of the top surface of the nozzle member as described above. This recessed part is provided in the upper part of the intermediate member which hold | maintains rotatably the obstruction | occlusion means for adjusting the amount of water sprayed from a small hole.

  With this configuration, first, the bolt member is fixed to the concave portion of the nozzle member. Next, a closing lid that closes each small hole is fixed to the bolt member. Accordingly, since the small hole is closed with the closing lid fixed to the bolt member, the closed state of the small hole can be maintained more firmly. In the cleaning medium introduction / discharge process, the cleaning medium is removed from the small hole. It is possible to prevent outflow.

  According to the snowpipe cleaning method and the obturator used therefor according to the present invention, the snowpipe that blows out a liquid for melting snow accumulates in the obturator having a simple configuration of small holes present in the region to be cleaned. Therefore, the sherbet-like cleaning medium containing cleaning water is introduced under pressure and discharged. Therefore, the snowpipe can be cleaned with a sherbet-like cleaning medium, which prevents clogging of small holes and extends the life of the snowpipe.

It is explanatory drawing which concerns on the cleaning method of the snow extinguisher of this invention. 1 is a schematic partial cross-sectional view of an obturator according to a first embodiment of the obturator of the present invention. The 2nd Embodiment of the obturator of this invention is related with 2nd Embodiment, and the schematic fragmentary sectional view of an obturator is shown. It is a schematic sectional drawing of a snow extinguishing nozzle.

  Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic overall view illustrating a cleaning method according to an embodiment of the method for cleaning a snowpipe of the present invention.

  The snowplow 10 is provided at the center of the road, and groundwater is sprayed at a predetermined watering angle to melt the snow accumulated in the up and down lanes. The snowpipe 10 has a groove in the road and is disposed at the bottom of the groove. In the snowpipe 10, a snowblower nozzle 12 is attached to the tip of a branch pipe 10 a branched upward from the snowpipe 10 at a predetermined interval P. A small hole (a spray port, a water spray port) of each snow extinguishing nozzle 12 is exposed to the road surface and is set to be substantially flush with the road surface.

  The snowpipe 10 is connected to a water supply pipe (not shown) for sending ground water or the like sprinkled on the snow, and the snowpipe 10 is provided with a mud drain 14 at the end. The flow rate of groundwater or the like flowing into the snowpipe 10 can be controlled by a flow rate adjustment valve (not shown) provided at the connection between the waterpipe and the snowpipe 10.

  Each snow-dissipating nozzle 12 is provided with a plurality of small holes (sprinkling ports) 12a, and a specific blocking means 42 is provided so that the amount of water spray can be adjusted. Specifically, the closing means 42 is an on-off valve, and the amount of water spray becomes zero by closing the valve. In the present embodiment, four water spouts are used.

  The open / close valve, which is a specific blocking means 42, is exposed to the road surface of the road as described above, so that it cannot be operated due to, for example, the vehicle riding on it for many years. May be. In the method for cleaning a snowpipe according to the present invention, it is necessary to close the water spout of the snowblower nozzle 12, but if it can be closed by the specific closing means 42, it is blocked by this, but if it is impossible, The obturator 22 or 30 described below is used.

  FIG. 2 shows a schematic partial cross-sectional view of the obturator according to the first embodiment, which relates to the obturator used in the obstruction process of the snowpipe cleaning method of the present invention. The obturator 22 shown in FIG. 2 closes the four water spray ports 12a of the snow extinguishing nozzle 12 with rubber plugs 24, which are plug members, and then covers the weight body 26 that covers all four water sprinkling ports 12a. Placed on the top surface. The weight body 26 has a substantially cylindrical shape with corners cut off. A convex portion 26a is formed on the bottom surface of the weight body 26 so as to be fitted into the concave portion from which the canopy 44 of the snow-dissipating nozzle 12 is removed, so that the weight body 26 does not move easily. Thus, the water spout 12a is closed with the rubber plug 24 and the weight body 26 is placed, so that a sherbet-like fluid having ice and water, which is a cleaning medium flowing through the snowpipe 10, is discharged from the water spout 12a. Outflow is prevented, and the inside of the tube can be cleaned with a sherbet-like fluid.

  FIG. 3 shows a schematic partial cross-sectional view of the obturator according to the second embodiment, which relates to the obturator used in the closing step of the snow-pipe cleaning method of the present invention. The obturator 30 includes a bolt member 32 that is fixed to the snow extinguishing nozzle 12, a packing 36 that closes the four water spray nozzles 12 a, and a closing lid 38 that is fixed to the bolt member 32 from above the packing 36. Here, the packing 36 is conceptually included in the closing lid 38.

  The bolt member 32 has a copper ring 34 fixed in the middle thereof, and the tip of the bolt member 32 is fitted into the recess 40 b of the snow extinguishing nozzle 12 closing means 42. The copper ring 34 is fitted into the recess from which the canopy 44 is removed. In this state, the copper ring 34 is tightened with the nut member 40 so that the diameter of the copper ring 34 is expanded in the recess and a reaction force is obtained. Thereafter, the packing 36 that covers the four watering nozzles 12 a is put on, and the closing lid 38 is fastened and fixed by the nut member 40 from above the packing 36. A washer 42 is inserted between the closing lid 38 and the nut member 40 to prevent the nut member 40 from loosening. The packing 36 is a flat plate formed of, for example, a rubber member. As the closing lid 38, a disk-shaped member whose diameter decreases as it goes upward is used. The material is metal, but it may be formed of a plastic material. The water spray port 12a of the snow-melting nozzle 12 is completely sealed by the packing 36 by tightening the closing lid 38 with the nut member 40, and a sherbet-like fluid having ice and water flows out from the water spray port 12a. Can be prevented.

  Compared with the obturator 22 of the first embodiment, the obturator 30 according to the second embodiment uses a bolt member 32 and a nut member 40, and connects the copper ring 34 to the canopy 44 of the snow extinguishing nozzle 12. Since the diameter of the closed lid 38 is fixed by the nut member 40, the small hole (sprinkling port) 12a is more reliably closed, and the closing tool 30 is made of a snow extinguishing nozzle. 12 is firmly fixed.

  When the closing process is completed by the obturator, as shown in FIG. 1, a sherbet-like fluid having ice and water is pressurized and injected into the snow extinguishing pipe 10 in the vicinity of one drainage drain 14 of the snow extinguishing pipe 10. A delivery unit 16 is arranged. A recovery vehicle 18 that recovers the fluid is disposed in the vicinity of the other waste mud drain 14. The delivery unit 16 and the waste mud drain 14, and the recovery vehicle 18 and the waste mud drain 14 are connected by a hose 20. In addition, the water flow adjustment valve provided in the connection part of a water pipe (not shown) and the snowpipe 10 is made into a closed state, and the water supply to the snowpipe 10 is made into the stop state.

  From the delivery unit 16, a sherbet-like fluid having predetermined ice and water is poured into the snow-pipe 10. When the predetermined length has been injected, the delivery unit 16 is operated to inject only water and move the fluid in the snowpipe 10. The sherbet-like fluid flows into the snow-dissipating nozzle 12 at a location where the snow-dissipating nozzle 12 is present, but the water spout 12a is closed, so that the fluid is prevented from flowing out of the snow-dissipating nozzle 12. Is done. Therefore, the sherbet-like fluid can smoothly move in the direction of the arrow 50, and the deposit 52 in the pipe can be removed. In particular, since the deposit 52 on the inner wall of the snowpipe 10 is efficiently scraped by the ice particles, the pipe can be effectively cleaned. When the fluid reaches the other drainage drain 14, the fluid is collected by the collection vehicle 18 and the cleaning operation is completed.

  In addition, although the sherbet-like fluid which has an ice particle and water was used as a washing | cleaning medium, the ratio of an ice particle and water was about 3: 7. The ratio can be freely changed according to the size and dirt of the snowpipe 10. Increasing the ice particle ratio improves the cleaning ability, but increases the flow resistance when transporting through the pipe. Furthermore, in the above embodiment, water is injected after the fluid to move the fluid, but it is also possible to continue injecting only the fluid without using water. Further, the flow rate of the fluid can be arbitrarily changed according to the snowpipe to be cleaned.

  After the snowpipe 10 is washed with a sherbet-like fluid containing ice particles and water, the snow removal nozzle 12 that has closed the small holes (water spouts) using the closure 22 or 30 is used as the closure 22. Or 30 needs to be removed. The removal of the obturator 22 can be performed simply by removing the weight body 26 placed on the obturator 22 and removing the rubber plug 24 blocking the small hole 12a. For the obturator 30, the nut member 40 that fixes the obstruction lid 38 is removed, and the obstruction lid 38 and the packing 36 are removed. And removal of the obturator 30 is completed by removing the nut member 40 which expanded the copper ring 34, and removing the copper ring 34 with the bolt member 32 after that. In addition, when the small hole 12a is obstruct | occluded with the specific obstruction | occlusion means 42 of the snow-melting nozzle 12, the obstruction | occlusion means 42 is operated and the obstruction | occlusion of the small hole 12a is cancelled | released.

  In this manner, after the snowpipe 10 is washed with a sherbet-like fluid having ice particles and water, the obturator 22 or 30 can be easily removed, and then watering is started as usual. You can melt the snow on the road.

  According to the present embodiment, when the water spray port 12a of the snow-fusing nozzle 12 attached to the snow-pipe 10 cannot be closed by the specific closing means 42, it is closed by the closing tool 22 or 30 (blocking step), and thereafter Since the sherbet-like fluid having ice particles and water is introduced into the snow extinguishing tube 10 and discharged (cleaning medium introduction / discharge step), the snow extinguishing tube 10 that could not be cleaned up to now is treated with ice particles and water. It became possible to wash with a sherbet-like fluid having After washing, the clogging of the small holes 12a of the snow squirting nozzle 12 was not seen, and the durability of the snow squeezing tube 10 was improved.

  Note that the present invention is not limited to the present embodiment. Various modifications can be made without departing from the spirit of the present invention. For example, in the first embodiment of the obturator, the substantially cylindrical weight body 26 with the corners cut off is used, but the shape may be arbitrary. In the second embodiment of the obturator, the obstruction lid 38 has a disk shape whose diameter decreases toward the top, but may be a simple flat plate. Furthermore, although the four small holes 12a of the snow extinguishing nozzle 12 are exemplified, the number thereof may be arbitrary.

10 Snow pipe 12 Snow nozzle 12a Water spout (small hole)
14 Drainage drain 16 Delivery unit 18 Recovery vehicle 20 Sherbet-like fluid 22, 30 Obturator 24 Plug member (rubber plug)
26 Weight 32 Bolt member 34 Copper ring 36 Packing 38 Closure lid 52 Deposits, etc.

Claims (4)

In the method of cleaning a snow extinguisher, in which a small hole for blowing out liquid at predetermined intervals is provided, and the snow in the vicinity region is melted by blowing out the liquid from the small hole.
A closing step of closing each small hole present in the region to be cleaned of the snowpipe;
A cleaning medium introduction / discharge step of pressurizing and introducing a sherbet-like cleaning medium containing ice particles and cleaning water from one end side to the area of the snow extinguishing tube after the closing process is completed, and discharging from the other end side. A method for cleaning a snowpipe, characterized by that. The closing step includes
For the small holes that can be closed by the specific closing means provided in advance in each of the small holes, the small holes are closed by the specific closing means,
2. The method for cleaning a snowpipe according to claim 1, wherein small holes that cannot be blocked by the specific blocking means are closed by an externally provided closing tool prepared separately. In the said obturator used in order to apply the cleaning method of the snow squeeze tube of Claim 2 with respect to the snow squeeze tube installed so that the said liquid may be blown off from the surface of the ground in order to melt the snow on the road in a snowy region ,
A plug member for individually closing each small hole in the region to be cleaned of the snowpipe;
An obturator comprising: a weight body that is placed over the plug member in the closed state and maintains the closed state of the plug member by its weight. In the said obturator used in order to apply the cleaning method of the snow squeeze tube of Claim 2 with respect to the snow squeeze tube installed so that the said liquid may be blown off from the surface of the ground in order to melt the snow on the road in a snowy area ,
Each of the small holes is formed in a nozzle member installed on the surface portion,
A bolt member fixed to the nozzle member;
And a closure lid for closing each small hole in a state of being fixed to the bolt member.

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