JP6552541B2 - Spray circulation system for antifreeze solution - Google Patents

Description

  The present invention relates to an antifreezing liquid spraying and circulating system for spraying an antifreezing liquid for preventing freezing / snow accumulation on a road, and more particularly to a system that enables the antifreezing liquid to be circulated and used.

  In snowy areas, anti-freezing agents (snow melting agents) mainly composed of salts such as calcium chloride, sodium chloride, and magnesium chloride may be sprayed to prevent snow accumulation on the road and road surface freezing. By spraying the antifreeze agent to eliminate snow accumulation and road surface freezing, a vehicle slip accident is prevented. This anti-freezing agent can be sprayed from a working vehicle traveling on the road in the granular state or in a state where the granule is dissolved in water to form an anti-freezing liquid, or from an injection device installed on the side of the road. It is carried out by injecting or the like. Instead of spraying anti-freezing agents, water and groundwater may be pumped up and sprayed.

  The antifreezing agent is used in an amount of, for example, about 200 to 300 kilograms per kilometer per road lane, and requires a large cost. In addition, the antifreezing agent may flow into farmland, rivers, and cause salt damage. Therefore, measures have been considered to reduce the amount of antifreeze used. For example, in the antifreezing agent automatic spraying control method shown in Patent Document 1, a snow and ice patrol vehicle equipped with a road surface state determination device that detects a road surface state (dry, semi-humid, wet, sherbet, snow, snow pressure, freezing, etc.) Run and register the road surface condition for each unit section of the road. Then, the antifreezing agent is sprayed based on the registered road surface condition by the antifreezing agent spraying vehicle equipped with the antifreezing agent spraying device for spraying the antifreezing agent. In this manner, by spraying only a necessary amount of the antifreeze agent based on the road surface state, the spraying amount is reduced while maintaining the antifreeze effect.

JP, 2015-90037, A

  In the control method shown in Patent Document 1, the amount of antifreeze sprayed on the road can be reduced, but the situation where the sprayed antifreeze flows into the farmland is the same, and is insufficient as a salt damage countermeasure. It is. Further, during the work of spraying the antifreezing agent by the work vehicle, there is also a problem that traffic congestion tends to occur behind the work vehicle due to low speed travel. Moreover, it can not be said that the method of pumping up and spraying fresh water or ground water instead of spraying the antifreezing agent is preferable in terms of cost.

  Accordingly, an object of the present invention is to prevent snow accumulation and road surface freezing on a road at a low cost while preventing salt damage.

  In order to solve the above-described problems, the present invention includes a spraying device that sprays an antifreeze liquid containing an antifreezing agent on a road, a recovery path through which the antifreeze liquid sprayed on the road by the spraying device flows, and the recovery The anti-freezing liquid spraying / circulating system comprising: a filtering device for filtering the anti-freezing liquid collected through the passage; and a storage tank for temporarily storing the anti-freezing liquid filtered by the filtering device. did.

  In this case, the antifreezing liquid containing the antifreezing agent sprayed on the road is recycled through the collection path, the filtering device, and the liquid storage tank. It is possible to prevent the inflow to as much as possible and to prevent salt damage. Further, since the antifreezing liquid is reused, the amount of the antifreezing agent used can be greatly reduced, and this system can be operated at a low cost.

  In the above configuration, it is preferable to further include a spraying tank provided in the spraying device, in which the antifreezing liquid fed from the liquid storage tank is temporarily stored.

  In this way, even if a problem occurs in part of the circulation system and the circulation of the antifreeze liquid is temporarily stopped, the antifreeze liquid stored in the dispersion tank can be sprayed from the spray device. , Snow on the road and road surface freezing can be reliably prevented.

  In each of the above-described configurations, it is preferable that a concentration sensor for measuring the concentration of the antifreezing liquid is provided in the liquid storage tank.

  In this way, the system administrator can quickly know that the concentration of the antifreeze liquid has been reduced by the water added to the antifreeze liquid as the snow melts. For this reason, for example, it is possible to take appropriate measures such as replenishing the antifreezing agent to the antifreezing solution, and it is possible to surely exert the snow melting and antifreezing effect by the antifreezing solution.

  The configuration provided with the concentration sensor further includes a replenishment device that replenishes the antifreezing agent with the antifreezing solution when the concentration of the antifreezing solution detected by the concentration sensor is equal to or lower than a predetermined concentration. It is preferable to do.

  If it does in this way, the density | concentration of an antifreezing liquid can be kept at a predetermined density | concentration without a manual intervention, and the snow melting and antifreezing effect by an antifreezing liquid can be exhibited more reliably.

  In this invention, the anti-freezing liquid spraying / circulating system for circulating and reusing the anti-freezing liquid containing the anti-freezing agent sprayed on the road is configured. According to this configuration, since the antifreezing liquid is reused, it is possible to prevent the inflow of the antifreezing agent into farmland or rivers as much as possible, and salt damage can be prevented. Further, since the antifreezing liquid is reused, the amount of the antifreezing agent used can be greatly reduced, and this system can be operated at a low cost.

Overall view showing an embodiment of a spray circulation system for an antifreeze liquid according to the present invention

  One embodiment of a spray circulation system for an antifreezing liquid according to the present invention will be described with reference to FIG. This anti-freezing liquid spraying / circulating system is a system for spraying anti-freezing liquid for freezing / snow accumulating on the road R, and particularly enables the anti-freezing liquid to be circulated and used. In this embodiment, although the example which provided this system in the elevated road R is shown, this system is employable also as the normal road R. FIG. This antifreezing liquid spraying / circulating system includes a spraying device 10, a recovery path 11, a filtering device 12, and a liquid storage tank 13 as main components.

  The spraying device 10 has a function of spraying the antifreezing liquid containing the antifreezing agent on the road R. The spraying device 10 is provided in the vicinity of the road R, and an injection pump 14 for pressurizing and spraying the antifreezing liquid is additionally provided. In this embodiment, the spraying device 10 is provided on both the left and right sides of the road R, but can also be provided on only one side. As the antifreezing agent, salts such as calcium chloride, sodium chloride, and magnesium chloride are mainly used, but other salts can also be used.

  The recovery path 11 is connected to the left and right side grooves of the road R, and the antifreeze liquid sprayed on the road R by the spraying device 10 flows in via the side grooves.

  The filtering device 12 has a function of filtering the antifreeze liquid recovered through the recovery path 11. In this embodiment, the filtration device 12 includes a first filtration device 15, a second filtration device 16, and a third filtration device 17 that are arranged in series from the upstream side to the downstream side of the flow of the antifreezing liquid. It is configured.

  The first filtration device 15 is a filtration device 12 provided in the preceding stage, and includes a pretreatment tank 18 and a posttreatment tank 19. The antifreeze solution having passed through the recovery passage 11 flows into the pretreatment tank 18. The pretreatment tank 18 is provided with a grating 20 in which a plurality of rod-like members are disposed horizontally and in parallel. This grating 20 removes relatively large debris such as twigs and empty cans.

  The gap of the grating 20 is preferably about 30 mm, but can be appropriately changed according to the size of the dust flowing into the pretreatment tank 18. The drain 21 is formed in the lower part of the pretreatment tank 18. From the drain 21, the dust deposited in the pretreatment tank 18 can be removed. The pretreatment tank 18 and the posttreatment tank 19 are connected by a connection pipe 22.

  In the post-treatment tank 19, the antifreeze liquid from which large dust has been removed by the pretreatment tank 18 flows through the connection pipe 22. The post-treatment tank 19 is provided with a grating 23 in which a plurality of rod-like members are erected vertically and in parallel. By this grating 23, a slightly smaller dust that could not be removed by the grating 20 provided in the pretreatment tank 18 can be removed.

  The gap of the grating 23 is preferably about 15 mm, but can be appropriately changed according to the size of dust flowing into the post-treatment tank 19. A drain 24 is formed below the post-treatment tank 19. From this drain 24, the dust settled in the post-treatment tank 19 can be removed. The post-treatment tank 19 and the second filtration device 16 are connected by a pipe 25.

  Over the pipe 25 is connected an overflow pipe 26. For example, when a large amount of antifreeze liquid flows into the recovery path 11 due to heavy snow and the filtration process in the filtration device 12 (second filtration device 16 or third filtration device 17) is not in time, A part flows into the overflow pipe 26 side from the recovery passage 11 and is configured so as not to cause a problem in the filtration device 12. Although the antifreeze solution flowing into the overflow pipe 26 finally flows into the river etc., the antifreeze liquid flows into the overflow pipe 26 when the river is also rising due to heavy snow etc. The solution is sufficiently diluted to prevent salt damage.

  In addition, since the antifreezing liquid flowing into the overflow pipe 26 has a large amount of dust removed by the first filtration device 15, it prevents a problem that the branch portion between the pipe 25 and the overflow pipe 26 is clogged with dust. be able to. In the middle of the pipe 25, a delivery pump 27 is provided for promoting the flow of the antifreezing liquid flowing through the pipe 25.

  The second filtration device 16 is a filtration device 12 provided at the middle stage, and has a main body 28 into which the antifreeze liquid from the first filtration device 15 directly flows, and a funnel shape provided near the center of the main body 28 A supernatant fluid recovery unit 29 is provided. A lid 30 is provided on the upper portion of the main body portion 28, and a drain 31 is formed on the lower end portion. A mesh filter 32 is provided at the upper opening of the supernatant fluid recovery unit 29.

  When the antifreezing liquid flows from the first filtration device 15 into the main body 28, dust having a large specific gravity (pebbles, sand, etc.) is deposited on the bottom of the main body 28. Further, when this antifreezing liquid flows into the supernatant liquid recovery unit 29, dust having a small specific gravity (such as fallen leaves and pieces of wood) is caught by the filter 32 provided in the supernatant liquid recovery unit 29. Then, the dust having a large specific gravity is removed from the drain 31 and the dust having a small specific gravity is removed by the filter 32. In addition, when the lid 30 is opened, the inside of the second filtration device 16 can be easily cleaned.

  The second filtration device 16 and the third filtration device 17 are connected by a pipe 33. The pipe 33 is provided with a delivery pump 34 so that the antifreeze liquid can be smoothly delivered from the second filtration device 16 to the third filtration device 17.

  The third filtration device 17 is a filtration device 12 provided in the rear stage, and in this embodiment, a plurality of filters 35 are arranged in multiple stages from the top to the bottom. The filter 35 is made finer in order from top to bottom, so that dust can be efficiently removed. The number of stages of the filter 35 is not particularly limited, and can be appropriately changed in consideration of the size of dust and the amount of dust contained in the antifreezing liquid. A drain 36 is formed at the bottom of the third filtration device 17, and dust (such as mud) that could not be removed by each filter 35 is removed from the drain 36.

  The third filtration device 17 and the liquid storage tank 13 are connected by a pipe 37. A delivery pump 38 is provided on the pipe 37 so that the antifreeze liquid can be smoothly delivered from the third filtration device 17 to the liquid storage tank 13.

  The liquid storage tank 13 has a function of temporarily storing the antifreeze liquid filtered by the filtration device 12 (the first filtration device 15, the second filtration device 16, and the third filtration device 17). Inside the liquid storage tank 13, a concentration meter as the concentration sensor 39 (hereinafter, the same reference numeral as the concentration sensor 39) is provided. The concentration meter 39 measures the concentration of the antifreezing liquid stored in the liquid storage tank 13. Further, the liquid storage tank 13 is provided with a replenishing device 40 for replenishing the liquid storage tank 13 with the antifreezing agent. An antifreeze is stocked inside the replenishment device 40. When the concentration of the antifreezing solution measured by the concentration meter 39 is lower than the predetermined concentration, the replenishing device 40 automatically operates to replenish the liquid storage tank 13 with a predetermined amount of the antifreezing agent. It is supposed to be.

  The liquid storage tank 13 is connected to a spraying tank 41 provided in the spraying apparatus 10 by a pipe 42. A delivery pump 43 is provided on the pipe 42 so that the antifreeze liquid can be smoothly delivered from the liquid storage tank 13 to the dispersing tank 41. In this way, by installing the spray tank 41 in the spray device 10, even if a trouble occurs in a part of the circulation system and the circulation of the antifreezing liquid is temporarily stopped, the spray tank 41 is stored in the spray tank 41. Since the anti-freezing liquid can be sprayed from the spraying device 10, it is possible to reliably prevent snow accumulation and road surface freezing on the road R.

  In the middle of the pipe 42, an outlet 44 for the antifreeze liquid is formed. A part of the antifreezing liquid flowing through the pipe 42 can be taken out from the outlet 44 and filled into the work vehicle C, and the antifreezing liquid can be sprayed on the road R where the spraying device 10 is not installed. Further, the work vehicle C can also deliver the antifreezing liquid to the spray tank 41.

  According to the anti-freezing liquid spraying and circulating system, since the anti-freezing liquid is reused, it is possible to prevent the anti-freezing agent from flowing into farmland or rivers as much as possible, and to prevent salt damage. Further, since the antifreezing liquid is reused, the amount of the antifreezing agent used can be greatly reduced, and this system can be operated at a low cost. Moreover, the traffic congestion problem caused by the work vehicle traveling at a low speed can be solved.

  The above embodiment is merely an example, and as long as the problem of the present invention of preventing snow accumulation and road surface freezing on the road R can be solved at low cost while preventing salt damage, the configuration thereof is appropriately changed. be able to.

  For example, in the above embodiment, the filtration device 12 has a three-stage configuration of the first filtration device 15, the second filtration device 16, and the third filtration device 17. However, the configuration of one or two stages or four or more stages It is also possible to have a multistage configuration.

  Moreover, in said embodiment, it can also be set as the structure which provided the stirring apparatus (not shown) in the liquid storage tank 13. FIG. In this way, the antifreezing agent replenished in the liquid storage tank 13 can be quickly dissolved. In addition, a heating device (not shown) for heating the antifreeze liquid may be provided in the liquid storage tank 13 or the dispersion tank 41. In this way, it is possible to further enhance the effect of melting snow and preventing freezing.

  Moreover, although it was set as the structure which adjoined the replenishment apparatus 40 to the liquid storage tank 13 in said embodiment, it can also be set as the structure attached to the tank 41 for dispersion. Alternatively, the antifreezing agent can be sprayed directly on the road R in response to a decrease in the concentration of the antifreezing liquid.

  Alternatively, the antifreeze liquid can be directly supplied from the liquid storage tank 13 to the spray device 10 without providing the spray tank 41. Further, without providing the replenishing device 40, the system administrator can manually replenish the antifreezing agent into the liquid storage tank 13 and the spraying tank 41 as the concentration of the antifreezing liquid decreases.

DESCRIPTION OF SYMBOLS 10 Scattering apparatus 11 Collection path 12 Filtration apparatus 13 Liquid storage tank 14 Injection pump 15 First filtration apparatus 16 Second filtration apparatus 17 Second filtration apparatus 18 Pretreatment tank 19 Posttreatment tank 20, 23 grating 21, 24, 31, 36 Drain 22 Connection pipe 25, 33, 37, 42 Piping 26 Overflow pipe 27, 34, 38, 43 Delivery pump 28 Body part 29 Supernatant fluid recovery part 30 Lid 32, 32 Filter 39 Concentration sensor (densitometer)
40 Refilling device 41 Tank for spraying 44 Removal port R Road C Work vehicle

Claims (2)

A spraying device (10) for spraying an antifreezing liquid containing an antifreezing agent on the road (R);
A recovery path (11) through which antifreezing liquid sprayed on the road (R) by the spraying device (10) flows;
A filtration device (12) for filtering the antifreeze liquid recovered through the recovery path (11);
A storage tank (13) provided with a concentration sensor (39) for measuring the concentration of the antifreeze solution, and temporarily storing the antifreeze solution filtered by the filtration device (12);
A replenishing device (40) for replenishing the antifreezing agent to the antifreezing solution when the concentration of the antifreezing solution detected by the concentration sensor (39) is lower than a predetermined concentration;
A spraying tank (41) provided with a heating device for heating the antifreezing liquid provided in the spraying apparatus (10), in which the antifreezing liquid sent from the liquid storage tank (13) is temporarily stored. )When,
Equipped with a,
The anti-freezing liquid spraying and circulating system, wherein the replenishing device (40) is provided upstream of the spraying tank (41) . The liquid storage tank (13) and the dispersion tank (41) are connected by a pipe (42), and in the middle of the pipe (42), an outlet (44) for the antifreeze liquid is formed. Then, a part of the antifreezing liquid flowing through the pipe (42) is taken out from the outlet (44) and filled into the work vehicle (C), and on the road (R) where the spraying device (10) is not installed. The system according to claim 1, wherein the antifreeze solution is dispersed.

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