JP4553783B2 - Emulsion sprayer - Google Patents

Description

  The present invention relates to an emulsion spraying device, and more particularly to an emulsion spraying device capable of equalizing the amount of spraying while suppressing the occurrence of unevenness of asphalt emulsion.

  As a conventional emulsion spraying device, for example, there is one as shown in FIG. In the figure, a plurality of (10 in the example shown in the figure) spray nozzles 1,... Are arranged in parallel at substantially equal intervals in the width direction of the traveling vehicle, such as an asphalt finisher. A plurality of spray nozzles 1,... Are connected in series with normally closed electromagnetic control valves 2,. The plurality of electromagnetic control valves 2,... Are connected in common at their supply ports 2 a, and an emulsion pipe 5 from an emulsion tank 4 containing asphalt emulsion is connected to the common connection point 3 via an emulsion pump 6. It is connected.

  A relief valve 7 is connected in parallel to the emulsion pump 6. When the pressure on the discharge side of the emulsion pump 6 increases above a preset pressure, the relief valve 7 relieves the pressure on the discharge side to the emulsion tank 4 side. Further, a controller 8 for controlling start / stop of asphalt emulsion spraying is provided, and a command signal line 9 from the controller 8 is commonly connected to each solenoid 2b of the plurality of electromagnetic control valves 2,. Has been.

  Then, when a spray start command from the controller 8 is given to the solenoids 2b of the plurality of electromagnetic control valves 2,..., All of the plurality of electromagnetic control valves 2,. At the same time. As a result, as shown in FIG. 4, the asphalt emulsion pressurized by the emulsion pump 6 is supplied in parallel so as to be distributed to all of the plurality of spray nozzles 1,. It is continuously sprayed on the road surface from all of 1,.

  Further, as conventional techniques related to the emulsion spraying device, for example, the following emulsion spraying device and emulsion spraying method are known. In this prior art, a plurality of spray nozzles that are opened and closed by opening and closing means are arranged in parallel in a direction intersecting the traveling direction of the traveling vehicle. And an emulsion pump for supplying emulsion in the emulsion tank to the plurality of spray nozzles, and a control device for controlling the plurality of spray nozzles and the emulsion pump so that an emulsion spray amount from the plurality of spray nozzles becomes a set value. And are provided.

When the amount of emulsion sprayed on the road surface is larger than the limit spray amount, the controller sets all spray nozzles to normal spray (continuous spray) and adjusts the emulsion feed rate by controlling the rotation speed of the emulsion pump. To do. On the other hand, when the emulsion spraying amount is less than or equal to the limit spraying amount, all spraying nozzles are simultaneously controlled to perform intermittent spraying. In the case of intermittent spraying, a plurality of spraying nozzles are divided into several groups, and each group is opened and closed with a time shift (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 10-237817 (pages 2 to 4, FIGS. 1 and 2).

  In the prior art shown in FIGS. 3 and 4, a spray start command from the controller is simultaneously given to each solenoid of a plurality of electromagnetic control valves, and all of the plurality of electromagnetic control valves are changed from the closed position to the open position. Switching at the same time. Then, the asphalt emulsion from one emulsion pump is supplied in parallel so as to be distributed to all of the plurality of spray nozzles, and is continuously sprayed on the road surface simultaneously from all of the plurality of spray nozzles.

  In order to uniformly spray the asphalt emulsion on the road surface in such a continuous spraying mode simultaneously with a plurality of spraying nozzles, it is necessary that the spraying amount from each spraying nozzle is the same amount. However, if there is an individual difference among the plurality of spray nozzles, the spray amount for each spray nozzle varies, and spray unevenness occurs. In particular, when a tendency of clogging occurs in some of the plurality of spray nozzles, the spray amount for each spray nozzle tends to vary.

  In the prior art described in Patent Document 1, all spray nozzles are set to normal spray (continuous spray), or all the spray nozzles are simultaneously controlled to perform intermittent spraying. In addition, during intermittent spraying, each group divided into several groups can be opened and closed at different times, but in this case as well, multiple spray nozzles contained in each group are controlled to open and close simultaneously. I am letting. For this reason, similarly to the prior art shown in FIGS. 3 and 4, if there are individual differences between the plurality of spray nozzles, the spray amount for each spray nozzle varies.

  Accordingly, there is a technical problem to be solved in order to suppress the occurrence of uneven dispersion of the asphalt emulsion to equalize the amount of dispersion and to accurately distribute the necessary amount of emulsion. The purpose is to solve.

The present invention has been proposed in order to achieve the above object, according to claim 1 invention Rutotomoni comprises a plurality of spray nozzles are arranged in parallel in the width direction at the bottom of the traveling vehicle, a single In the asphalt emulsion spraying device for spraying asphalt emulsion discharged from the emulsion pump from the plurality of spray nozzles ,
The asphalt emulsion spraying operation is performed individually for each spray nozzle in the plurality of spray nozzles, so that the entire discharge amount of the emulsion pump can be sprayed. providing an emulsion spray apparatus characterized by being configured to control independently through a command to the solenoid control valve from the controller.

According to this configuration, the spraying operation of each spray nozzle can be controlled independently , and the spray operation of asphalt emulsion can be performed in order for a predetermined time from each of the spray nozzles arranged in parallel. Become. At this time, is discharged from the emulsion pump is the total amount of bitumen emulsion to be sprayed simultaneously from all of a plurality of spray nozzles, is sprayed in order from the spray nozzle by a predetermined time. Therefore, the occurrence of uneven spraying due to individual differences for each spray nozzle when spraying simultaneously from all of the plurality of spray nozzles can be suppressed.

  According to a second aspect of the present invention, there is provided an emulsion spraying apparatus wherein the individual spraying nozzles periodically perform the asphalt emulsion spraying operation for a predetermined time.

  According to this configuration, for example, if the number n of the plurality of spray nozzles is set to 10 and one cycle T is set to 2 seconds, each spray nozzle has the predetermined time t = [(( T / n) = (2/10)] = Control is performed so as to execute the spraying operation periodically for 0.2 seconds. Then, the amount of asphalt emulsion that is almost the same as the total amount of asphalt emulsion to be sprayed continuously from all 10 spray nozzles is sprayed in the order of 0.2 seconds from each spray nozzle. Will be. As a result, by setting the one period T as short as described above, when the required amount of asphalt emulsion is sprayed, the spraying is caused by individual differences for each spray nozzle when spraying from all of the plurality of spray nozzles simultaneously. Generation of unevenness is suppressed.

  According to a third aspect of the present invention, the amount of asphalt emulsion sprayed in the individual spray nozzles within the predetermined time is determined by the individual sprays when all of the plurality of spray nozzles sprays simultaneously in one cycle. An emulsion spraying device having the same amount as a nozzle spraying amount is provided.

  According to this configuration, the amount of asphalt emulsion equal to the total amount of asphalt emulsion to be sprayed simultaneously from all of the plurality of spray nozzles in the sequential spraying operation for each predetermined time from each spray nozzle. Be sprayed.

The invention according to claim 1 includes a plurality of spray nozzles arranged in parallel in the width direction of the traveling vehicle, and the spraying operation of the asphalt emulsion in the plurality of spray nozzles is performed individually in the plurality of spray nozzles. controlled independently for the nozzle, then the total amount of bitumen emulsion to be sprayed continuously at the same time from all the plurality of spray nozzles, by controlling so as to spread in the order from the individual spray nozzles by a predetermined time, a plurality There is an advantage in that the occurrence of dispersion unevenness due to individual differences for each spray nozzle when spraying from all of the spray nozzles at the same time is suppressed, and the asphalt emulsion spray amount can be equalized.

  In the invention according to claim 2, since the individual spray nozzles periodically perform the asphalt emulsion spraying operation for a predetermined time, the required amount is set by setting one cycle as short as possible. When asphalt emulsion is sprayed, it is possible to suppress the occurrence of unevenness of dispersion due to individual differences among the spray nozzles when spraying from all of the plurality of spray nozzles at the same time, and to further equalize the asphalt emulsion spray amount. There is an advantage that you can.

  According to a third aspect of the present invention, the amount of asphalt emulsion sprayed in the individual spray nozzles within the predetermined time is determined by the individual sprays when all of the plurality of spray nozzles sprays simultaneously in one cycle. Since the spraying amount is the same as the spraying amount of each nozzle, the same amount as the total amount of asphalt emulsion to be sprayed simultaneously from all of the spraying nozzles in the order of spraying from each spraying nozzle for a predetermined time. There is an advantage that the amount of asphalt emulsion can be sprayed accurately.

  A plurality of spray nozzles arranged in parallel in the width direction of the traveling vehicle are provided for the purpose of equalizing the spray amount by suppressing the occurrence of uneven dispersion of the asphalt emulsion, and accurately spraying the required emulsion amount. The spraying operation of the asphalt emulsion in the plurality of spray nozzles is configured to be controlled independently for each spray nozzle in the plurality of spray nozzles, and each of the spray nozzles periodically rotates the asphalt emulsion for a predetermined time. The amount of asphalt emulsion sprayed within the predetermined time is the same as the amount sprayed by the individual spray nozzles when all of the plurality of spray nozzles sprays simultaneously in one cycle. And realized.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a system diagram of an emulsion spraying apparatus, and FIG. 2 is a timing chart of asphalt emulsion spraying. In FIG. 1, the same or equivalent components as those in FIG. 3 are denoted by the same reference numerals as those in FIG.

  First, the configuration of the emulsion spraying apparatus according to this embodiment will be described. As shown in FIG. 1, in this embodiment, command signal lines 10,... Are individually connected from the controller 8 to the solenoids 2b,. By this connection mode, the plurality of electromagnetic control valves 2,... Can be opened and closed separately, so that the asphalt emulsion spraying operation in the plurality of spray nozzles 1,. It is configured to be controllable.

  Next, the operation of the emulsion spraying device configured as described above will be described with reference to FIG. In order to suppress the occurrence of unevenness of dispersion due to individual differences among the spray nozzles 1, the emulsion spraying device periodically transfers the asphalt emulsion for each spray nozzle 1 in order for a predetermined time in accordance with a command from the controller 8. Running spraying operation.

  At this time, the amount of asphalt emulsion to be discharged from the single emulsion pump 6 and simultaneously sprayed from the plurality of spray nozzles 1,... Become. Accordingly, when looking at the discharge amount of asphalt emulsion per unit time from one spray nozzle 1, the discharge amount per unit time when spraying from each spray nozzle 1 for the predetermined time is a plurality of sprays. When all of the nozzles 1,... Are sprayed at the same time, the discharge amount per unit time from each spray nozzle 1 is a multiple.

  As a result, when the spraying operation is executed periodically, the spray amount of the asphalt emulsion within the predetermined time of each spray nozzle 1 is continuously sprayed by one of the plurality of spray nozzles 1,. In this case, the amount is the same as the spraying amount of one spraying nozzle 1.

  This will be described more specifically using numerical examples. Now, if the number n of the plurality of spray nozzles is set to 10 as shown in FIG. 1 and one cycle T is set to 2 seconds, each spray nozzle 1 has the predetermined time t = [ (T / n) = (2/10)] = The spraying operation is executed periodically for 0.2 seconds.

  At this time, assuming that the discharge amount per unit time from each of the spray nozzles 1 when all of the plurality of spray nozzles 1,... Are sprayed simultaneously is q (see FIG. 4), the spraying operation is periodically executed. The discharge amount per unit time when each spray nozzle 1 sprays for a predetermined time t = 0.2 seconds is 10 · q as shown in FIG.

  Then, the amount of asphalt emulsion almost equal to the total amount of asphalt emulsion to be sprayed continuously from all of the ten spray nozzles 1,... Is sprayed in order of 0.2 seconds from each spray nozzle 1. In action, it will be sprayed. As a result, by setting the one cycle T as short as described above, when spraying the required amount of asphalt emulsion, individual differences for each spray nozzle 1 when spraying simultaneously from all of the plurality of spray nozzles 1,. Occurrence of scattering unevenness caused by

  As described above, in the emulsion spraying apparatus according to this embodiment, the amount of asphalt emulsion discharged from the single emulsion pump 6 and sprayed from all of the plurality of spray nozzles 1,. By periodically spraying a predetermined time t from 1, the occurrence of scattering unevenness due to individual differences for each spray nozzle 1 can be suppressed.

  Further, when the spraying operation is periodically performed, the spraying amount of the asphalt emulsion within the predetermined time t of each spraying nozzle 1 is continuously sprayed continuously for one period T by all the spraying nozzles 1,. In this case, since the amount of spraying is the same as the amount of spraying of one spraying nozzle 1, the spraying operation from each of the spraying nozzles 1 at a predetermined time t in order is performed simultaneously from all of the plurality of spraying nozzles 1. The amount of asphalt emulsion equivalent to the total amount of asphalt emulsion to be spread can be accurately spread.

  The present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

1 is a system diagram of an emulsion spraying apparatus according to an embodiment of the present invention. The asphalt emulsion dispersion | distribution timing chart in the said Example. System diagram of a conventional emulsion spraying device. The asphalt emulsion dispersion | distribution timing chart in the said prior art example.

Explanation of symbols

1 Spray nozzle 2 Electromagnetic control valve 8 Controller 10 Command signal line for each

Claims (3)

Rutotomoni comprising a plurality of spray nozzles are arranged in parallel in the width direction at the bottom of the traveling vehicle, an asphalt emulsion ejected from single emulsion pump, in bitumen emulsion sprayer for spraying from the plurality of spray nozzles,
The asphalt emulsion spraying operation is performed individually for each spray nozzle in the plurality of spray nozzles, so that the entire discharge amount of the emulsion pump can be sprayed. emulsion spray apparatus characterized by being configured to control independently through a command to the solenoid control valve from the controller.   2. The emulsion spraying apparatus according to claim 1, wherein the individual spray nozzles periodically perform the asphalt emulsion spraying operation for a predetermined time.   The amount of asphalt emulsion sprayed within the predetermined time in the individual spray nozzles is the same as the spray amount of the individual spray nozzles when all of the plurality of spray nozzles sprays simultaneously in one cycle. The emulsion spraying apparatus according to claim 2, wherein the emulsion spraying apparatus is provided.

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