JP4105118B2 - Road snowmelt watering method - Google Patents

Description

The present invention relates to a method for melting snow on a road that melts and removes snow and icing on a road by spraying water from a waterway on the ground.

There is a non-sprinkling snow melting facility that embeds a heating element that generates heat when energized in a road and melts it during snowfall or snow accumulation, but this type of snow melting facility requires a large system and is applicable to a wide range of roads. This is difficult in terms of equipment costs and maintenance costs. In addition, as a facility for melting snow by watering, a snow melting facility that sprays warm water heated by solar heat onto the road when snowing, a snow melting facility that sprays ground water as warm water, a snow melting facility that uses warm water heated by a boiler and river water, and river water (See, for example, Patent Document 1).
JP-A-10-292334

  The sprinkling snow melting equipment as described above has an excellent snow melting function and is effective for roads in cold regions, but it requires special equipment and ingenuity to obtain hot water of several degrees Celsius or more during snowfall. Similarly, it is difficult to apply to a wide range of roads in terms of equipment costs and maintenance costs. Therefore, the present inventor tried to develop a snow melting water sprinkling unit that sprinkles water as it is without heating the river water, and developed the present invention through the following field experience.

  For example, when water from a river is sprinkled due to snow melting on the road, the water from the river is sucked up by a land pump, pumped to a water sprinkling port through a sprinkling pipe, and ejected and discharged from the water spout onto the road. In order to prevent the water sprinklers on the road from being clogged with floating materials (solid waste) in the river, double and triple screens of different sizes are provided on the suction side of the onshore pump in stages to create large and small floats. Gradually pick up objects and supply water without floating substances from the discharge port of the land pump to the sprinkler on the road. In this way, unless the river water freezes, snow can be melted on the road with a sufficient amount of water spray that does not cost much, and the river water is almost frozen during the snow season except in cold regions where the river water is likely to freeze. Not promising in snowy areas.

  In actual operation, the amount of suspended solids in river water is extremely large compared to groundwater, and if this suspended matter is removed before reaching the land pump, suspended matter accumulates on the screen in a short time of several hours or less. As a result, clogging occurs, and the suction side flow velocity of the onshore pump is reduced to prevent good road watering. Even when part or all of the double and triple screens have an automatic screen structure that automatically removes accumulated suspended matter, the influence of a decrease in the flow velocity on the suction side of the land pump is large. Accordingly, it is necessary to periodically stop the land pump and automatically remove suspended matter on the automatic screen by a cleaning method, and then restart the land pump. This re-operation of the land pump is usually carried out after refilling with a priming pump because air flows in when the operation is stopped. In other words, the land pump will theoretically run idle when 3 or more air enters the suction pipe during re-operation, assuming that the water filling state in the suction pipe is 100. The floating screen is removed from the automatic screen installed on the suction pipe side of the land pump by opening the float discharge valve. At this time, air flows into the suction pipe side of the land pump, so re-operation is the expiratory pump. It needs to be done after filling with water. Such re-operation after a temporary stop of a land pump needs to be repeated several times a day with a short period of several hours or less, and more than 5 minutes is required from the stop of the land pump to re-operation. In the meantime, the snow melting work is interrupted, and the snow melting efficiency and the facility operation rate are lowered.

The present invention has been made from such field experience, running it is an object continuously come in operation without interruption from the start of the snow melting watering operation, also capable of effectively utilizing the waste water drainage The object is to provide a road snowmelt water spraying method that is advantageous in terms of cost.

The present invention devised to achieve the above object is a road snow melting water sprinkling method in which water in a ground water channel is pumped to a sprinkling port of a remote road by a water pump and sprinkled on the road . It includes land pump disposed in the upper than the water passage, the auto strainer that is connected to the discharge port side of 該陸on the pump, to the mouth watering taking strained suspended solids of water in the water channel to be discharged from 該陸the pump and dispensing, together continuously performed the operation to eliminate automatically based on the amount of suspended matter taken strained, by the terrestrial pump and vacuum pump were connected to each of the automatic strainer, initial only evacuated's snow melting watering operation Each of the land pump and the auto strainer is filled with water from the water channel .

  Here, the water in the canal is either drainage drainage, river water, seawater, or lake water. In practice, drainage in the drainage channel close to the road is the most practical because there is no problem of water intake right like river water. It is. Hereinafter, if the water channel is referred to as a drainage channel and the water is referred to as drainage as necessary, the drainage of the drainage channel flows through the drainage channel in a stable amount such as domestic wastewater and industrial wastewater, and hardly freezes in winter. The water pump can be a land pump installed above the water channel, a submersible pump installed in the water of the water channel, and multiple pumps that combine these land pumps and submersible pumps can be used together. it can.

  In the present invention, when a single land pump is used as the water pump, the lower end of the water absorption pipe is disposed in the water of the drainage channel via a rough screen, and the water absorption pipe is extended from the water channel to the land, A land pump can be connected to the tip. The land pump has a suction port (water suction port) connected to a water suction pipe (suction pipe) and a discharge port (water discharge port) connected to a water spray pipe. The watering pipe here is a pipe that communicates with a watering port of the road. By driving the land pump with an electric motor, the drainage of the drainage channel is sucked into the water suction pipe and pumped to the water spray pipe. An auto strainer is connected to a part of the sprinkler pipe, and suspended matter in the wastewater sent from the land pump is removed by the auto strainer, and water without the suspended matter is pumped from the sprinkler pipe to the sprinkler on the road. An automatic strainer is an automatic machine that automatically scrapes out with a rotating brush or scraper and discharges it to the outside using the differential pressure between the atmospheric pressure and the discharge pressure of the land pump when the collected suspended matter accumulates to some extent. Existing equipment can be applied.

  In addition, by installing an autostrainer on the discharge side of the onshore pump, the drainage of the drainage channel flows into the onshore pump together with floating substances. This inflowing floating matter is a fine thing that has passed through the fine screen of the water absorption pipe, etc., and includes those that are clogged in the water sprinkling port of the road, but this floating substance does not affect the land pump and does not affect the watering pipe. Is sent out. The auto-strainer finally scoops out and removes suspended matter in the wastewater sent from the land pump to the sprinkler pipe. The auto strainer operates continuously without interrupting the work of scavenging suspended solids.When the road snow melting water sprinkling unit starts operation, it continues to operate until the operation stop command signal is received. Increases operating rate and snow melting effect on the road. The start of operation of the snow melting unit on the road is always efficient if it is performed based on the snow confirmation signal from the snow detection sensor, the water level signal whether the water level in the waterway is at the allowable level, and the humidity signal in the surrounding environment. Snow melting operation is possible.

  In the present invention, when a land pump is used as a water pump, a vacuum pump is connected to each of the land pump and the auto strainer for evacuating only in the initial stage of the road snowmelt watering operation and filling each with water in the waterway. Can do. Here, the vacuum pump evacuates each of the water suction pipe, the water supply pump, and the auto strainer that are in an operation stop state before operation and fills them with drainage water so as not to run idle. Although such water filling can be performed by a priming pump, the time required for water filling by the vacuum pump is as short as several minutes or less, which is efficient. In addition, road snowmelt sprinkling operation is continuously performed for a long period of time from the time of snowfall until the snow stoppage is issued until a stop command is issued. The operation stoppage time required for water is extremely short, and it has no effect on snow melting efficiency and equipment availability.

In the present invention, when a submersible pump is used in combination with the above-mentioned land pump as a water pump, the suction port of the submersible pump is submerged in the drainage of the drainage channel, and the wastewater sucked by the submersible pump is absorbed by water. Water can be pumped to a land-based autostrainer through a (water supply) pipe. In this case, use an auto strainer located above the drainage channel or a submersible pump with a head performance corresponding to the height to the road. The submersible pump does not need to be refilled at the initial stage of operation, and by starting the operation, drainage water from the drainage channel is continuously sent to the auto strainer, so that the snow melting efficiency and the equipment operation rate are increased.

According to the present invention, since the snow melting and water spray after removing suspended material in the auto scan trainer is pumped to the auto strainer water ground waterways water pump on the road, without the mouth watering roads clogged, In addition, there is a practically excellent effect that snow melting work can be performed efficiently and continuously without temporarily interrupting the water pump during operation. In addition, water in the waterway can be used, and by using this water, equipment costs and maintenance costs can be reduced, and there is almost no occurrence of water shortage even during snowfall. Reliable snowmelt water spraying method can be provided. In addition, the vacuum pump draws a vacuum only at the beginning of road snowmelt watering operation and fills each of the onshore pump and the auto strainer with water from the waterway, so it can stop idling and shorten the time required for water filling. It becomes the target.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2A and 2B, and a second embodiment will be described with reference to FIG.

FIG. 1 is a side view schematically showing an entire road snowmelt water spraying unit 10 used for carrying out the road snowmelt water spraying method of the present invention . The unit 10 absorbs drainage 3 from a drainage channel 2 provided on the ground 1. In this facility, the water is sprinkled from the water spout 5 of the road 4 to melt snow. In the unit 10, a water absorption pipe 20, a land pump 30 a that is a water pump, and a water spray pipe 40 are connected in series, and an auto strainer 50 that is an existing facility is connected to a part of the water spray pipe 40. Further, a vacuum pump 60 for filling each of the water suction pipe 20, the land pump 30a and the auto strainer 50 is connected to form the basic structure of the unit 10.

  The drainage channel 2 is near the road 4, and the lower end portion of the water absorption pipe 20 is fixedly disposed in the water of the water absorption site installed at an arbitrary location of the drainage channel 2. In the water absorption place, a weir (not shown) is provided to raise the water level of the drainage 3, and the lower end of the water absorption pipe 20 is submerged in the drainage 3 in the vertical direction. The water absorption pipe 20 extends right above or obliquely upward from the water channel 2, and an upper end portion that is bent and horizontal is connected to a suction port of a land pump 30 a installed at a fixed position on the ground 1. The height from the water surface of the drainage channel 2 to the suction port of the land pump 30a is set to less than 5 to 6 m, which is the practical maximum head of the land pump 30a. The lower end portion of the water absorption pipe 20 is surrounded by a coarse screen 21 installed in water, and the water absorption port at the lower end portion is covered with a fine screen 22. Both screens 21, 22 prevent large solid floating matters (dust etc.) such as broken rods in the drainage 3 from being absorbed by the water absorption pipe 20, and the water absorption capacity of the drainage 3 to the water absorption pipe 20. It is possible to apply a popular metal mesh spread screen that does not interfere with the above.

  The sprinkling pipe 40 communicates with the discharge port of the land pump 30a. The land pump 30 a is operated by the electric motor 31, sucks up the drainage 3 of the drainage channel 2 by the water absorption pipe 20, and pumps it to the watering pipe 40. The drainage 3 pumped to the water sprinkling pipe 40 reaches the water spout 5 of the road 4 via the auto-strainer 50 on the way, and is ejected from the water spout 5 onto the road to melt snow. The drainage 3 of the drainage channel 2 flows constantly, so that it does not freeze even during snowfall, and melts snow sufficiently while maintaining a water temperature of several degrees Celsius or more.

  The auto strainer 50 is a cylindrical device that is vertically long and has an automatic dust remover 51 that can rotate in the horizontal direction inside, and has a drain outlet at the top and a drain outlet at the bottom. A sprinkling pipe 40 extending from the land pump 30a communicates with the drainage inlet, and another sprinkling pipe 40 communicates with the lower drainage outlet. The other water sprinkling pipe 40 is provided with a water supply electromagnetic valve 52, and the water supply electromagnetic valve 52 is opened to water the road 4. The auto-strainer 50 uses the differential pressure between the atmospheric pressure and the discharge pressure of the land pump 30a to drive the automatic dust remover 51 so that the suspended matter is removed from the wastewater supplied from the drainage inlet with a mesh. When there is a predetermined amount of suspended matter that has been crushed with a mesh, it is scraped out with a brush or scraper and automatically discharged to the outside. This floating substance is discharged by opening the sludge discharge motor-operated valve 53 and discharging it to the drainage channel 2.

  The land pump 30a, the vacuum pump 60, and the autostrainer 50 of the road snow melting water spraying unit 10 of FIG. 1 are stored in a compact package in a stainless exterior box 80 as shown in FIGS. An opening / closing door is installed on the side wall of the exterior box 80, and an internal inspection window is installed on the roof. Note that reference numeral 70 in FIG. 2A denotes an operation control panel that supervises automatic operation of the unit, switching of manual operation, safety check, and the like. 2A shows that the water absorption pipe 20, the land pump 30a, and the operation control panel 70 are arranged side by side on the back side in the exterior box 80, and the auto strainer 50 is installed in front of the land pump 30a. FIG. 2B shows that the auto strainer 50 and the water spray pipe 40 are arranged side by side on the front side in the exterior box 80. By adopting such an arrangement relationship, the internal space of the exterior box 80 is effectively used, the exterior box 80 becomes small and compact, and the equipment cost of the entire unit can be reduced.

  The driving | operation of the above road snow melting water spraying unit 10 is demonstrated. A water level sensor (not shown) for detecting the water level of the drainage 3 is installed in the drainage channel 2, and a water level signal for starting or stopping the operation is output to the operation control panel 70. A snowfall detection sensor and a humidity sensor (not shown) are installed outside the exterior box 80, and an operation start or stop snowfall status signal and a humidity signal are output to the operation control panel 70. When all of these signals are signals for starting operation, first, the vacuum pump 60 is activated, and the water suction pipe 20, the land pump 30a, and the auto strainer 50 are filled with the drainage 3 of the drainage channel 2 so as not to idle. The time required for this water filling is a short time of several minutes (about 3 minutes). When the sensor detects completion of filling, the vacuum pump 60 is stopped, the electric motor 31 is started, the land pump 30a is activated, and the water absorption operation of the water absorption pipe 20 is started. The drainage 3 absorbed by the water suction pipe 20 is pumped to the water spray pipe 40, and the suspended matter is scooped out while passing through the auto strainer 50, and finally ejected (flowed out) from the water spout 5 of the road 4. During the operation of watering the road, the autostrainer 50 is continuously operated to remove floating substances, and there is no fear that the water spout 5 is clogged with floating substances.

  During the operation of watering the road, when the snowfall stops and the necessity of melting snow is reduced, this is detected by the operation control panel 70 and the operation of the land pump 30a and the auto strainer 50 is stopped, thereby wasting power. To avoid.

FIG. 3 is a side view schematically showing the road snow melting water sprinkling unit 10 including only the submersible pump 30b that can be used in combination with the above-described land pump 30a . The unit 10 in the drawing sucks the drainage 3 from the drainage channel 2 with the submersible pump 30b and pumps it up to the auto strainer 50 through the water absorption (water supply) pipe 20. When the submersible pump 30b is always submerged in the drainage 3 so that the suction port of the submersible pump 30b is below the surface of the drainage 3, and the electric motor built in the submersible pump 30b is driven, the drainage 3 absorbed by the suction port Rises up the water absorption pipe 20 and is pumped to the auto strainer 50. As the auto strainer 50, the same one as in FIG. 1 can be used. The waste water 3 pumped from the submersible pump 30b to the auto strainer 50 is sprinkled with floating matter by the automatic dust remover 51 in the auto strainer 50, and the waste water without the floating matter passes through the sprinkling pipe 40 and is scattered on the road 4. Water is sprayed from the water outlet 5. When a predetermined amount of suspended matter scraped off by the auto strainer 50 is stacked, this is scraped out by a brush or a scraper, and the sludge discharge electric valve 53 is opened and discharged to the drainage channel 2.

  Corresponding to the height from the drainage channel 2 to the auto strainer 50, the head performance of the submersible pump 30b is designed. Therefore, even in the location where the auto strainer 50 is installed at a high place exceeding 5 to 6 m of the practical maximum lift of the land pump of FIG. 1, the submersible pump 30b is sufficient for the auto strainer 50 at the high place. Pump up the water. In addition, when using a land pump in the same location conditions, civil engineering work such as changing the installation position of the land pump to a low place may be performed, but such civil engineering work is not necessary if a submersible pump is used. As a result, the construction cost of the road snowmelt water sprinkling unit is reduced.

  Further, the road snow melting water spraying unit of FIG. 3 using a submersible pump as a water pump does not require the pump filling required in the unit of FIG. 1 in the initial stage of operation, and the operation can be started more quickly. The vacuum pump for filling water can be omitted, and the equipment cost can be reduced.

In addition, the road snow melting water spraying method of the present invention is not limited to the above-described embodiment, and it is needless to say that various changes can be made without departing from the gist of the present invention.

It is a side view which shows the outline | summary of the whole unit which shows 1st Embodiment of the road snow melting water spraying unit used for implementation of the road snow melting water spraying method of this invention. (A), (B) is a side view which shows the actual arrangement | positioning relationship of the principal part of the road snow melting water sprinkling unit of FIG. It is a side view which shows the outline | summary of the whole unit which shows 2nd Embodiment of the road snow melting water spraying unit used for implementation of the road snow melting water spraying method of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 2 Waterway, drainage channel 3 Water, drainage 4 Road 5 Water sprinkling port 10 Road snow melting water sprinkling unit 20 Water absorption pipe 30a Water pump, Land pump 30b Water pump, Submersible pump 31 Electric motor 40 Water spray pipe 50 Autostrainer 52 Water supply solenoid valve 60 Vacuum pump 70 Operation control panel

Claims (2)

Water ground waterways a snow melting water spray method of watering pumped into mouth watering a remote road in the road by a water pump,
The water pump includes a land pump disposed in the upper than the water passage, the auto strainer that is connected to the discharge port side of 該陸on the pump, taking strained suspended solids of water in the water channel to be discharged from 該陸the pump and dispensing into the mouth watering, performs continuously the operation to eliminate automatically based on the amount of suspended matter taken strained,
A road snow melting system characterized by evacuating only the initial stage of road snow melting watering operation and filling each of the land pump and the auto strainer with water in the water channel by a vacuum pump connected to each of the land pump and the auto strainer. Watering method . The water pump is snow melting watering method according to claim 1, characterized in that it comprises a water pump disposed in the water channel.