JP2004244883A - Water sprinkler of rolling vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an economical water sprinkler of a rolling vehicle for sprinkling water on the front rolling wheel side and the rear rolling wheel side even when the pump function is impaired by failure in one pump of pumps arranged in a pair. <P>SOLUTION: This water sprinkler 1 of the rolling vehicle is mounted with water tanks 4 and 5, and sprinkles the water via nozzles 8 and 9 in a front rolling wheel and a rear rolling wheel of the vehicle, and is constituted so that a pipe is laid in parallel to a pair of pumps P1 and P2 from the water tanks 4 and 5, and delivery port side pipes T1a and T2a of the respective pumps P1 and P2 are merged once, and are branched off so as to communicate with a pipe T4 communicating with the front rolling wheel side nozzle 8 and a pipe T5 communicating with the rear rolling wheel side nozzle 9 on the downstream side of a confluent part 12. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling vehicle equipped with a watering tank and performing watering on a front rolling wheel and a rear rolling wheel of the vehicle.
[0002]
[Prior art]
When asphalt-paving roads or the like with a compacted vehicle, if rolling is performed on the pavement surface while the compacted wheels are dry, asphalt mixture adheres to the surface of the compacted wheels, and if the compaction continues as it is, The deposits impair the flatness and smoothness of the pavement surface. Therefore, in general, rolling compact vehicles are equipped with a water spraying device that sprays water or liquid agent by nozzles toward the surface of the compacting wheel, and prevents water or asphalt from adhering continuously or intermittently during compacting work. The adhesion of asphalt mixture is prevented by spraying a liquid agent such as an agent onto a rolling wheel (for example, see Patent Document 1).
[0003]
FIGS. 4 (a) and 4 (b) are watering circuit diagrams showing two conventional examples of a watering device, both of which are provided with a water tank 51 for a front rolling wheel and a water tank 52 for a rear rolling wheel. Is shown. FIG. 4A shows a structure in which a circuit for the front rolling wheel and a circuit for the rear rolling wheel are independent from each other, and a pipe connecting the water tank 51 and the nozzle 53 for the front rolling wheel. A spiral pump 55, a filter 56, and a check valve 57 are provided from the upstream side in pipes that communicate the water tank 52 and the nozzle 54 for the rear rolling wheel. Downstream from the centrifugal pump 55, a cock 58 for air release is provided. The check valve 57 is a valve for preventing the residual pressure in the pipeline and the water dripping due to the siphon phenomenon after the spiral pump 55 is stopped.
[0004]
FIG. 4 (b) shows that the pipes from the water tanks 51 and 52 are once joined at a joining section 59, and the spiral pump 55, the filter 56, and the check valve 57 are connected from the upstream side on the joined pipes. After the provision, a structure is shown in which the pipe is branched at the branching section 60 and communicated with the nozzles 53 and 54. A cock 58 for bleeding air is provided between the filter 56 and the check valve 57.
[0005]
[Patent Document 1]
JP-A-2000-257016 (page 4, FIG. 1)
[0006]
[Problems to be solved by the invention]
According to the conventional sprinkler shown in FIGS. 4A and 4B, there are the following problems.
First, in the sprinkler shown in FIG. 4 (b), when the pump function is impaired due to a failure or the like of the centrifugal pump 55, watering stops on both the front rolling wheel side and the rear rolling wheel side. It becomes. Although the sprinkler shown in FIG. 4A has a pair of spiral pumps 55, the circuit for the front rolling wheel and the circuit for the rear rolling wheel are independent of each other. If the centrifugal pump 55 fails, water spraying on either the front rolling wheel side or the rear rolling wheel side will stop. Since it is necessary to always perform rolling while spraying water on both rolling wheels, it is a problem even if watering of one of the rolling wheels is not possible. I had to stop.
In the apparatus shown in FIG. 4A, a spare spiral pump 55 'is provided so as to be in parallel with each spiral pump 55, and when the spiral pump 55 fails, the spare spiral pump 55' is used. However, in this case, four spiral pumps are required in total, which results in an expensive water sprinkler.
[0007]
Further, for example, in order to prevent water in the pipeline from freezing in cold weather, when all the water in the pipeline is drained and then watering in the rolling compaction operation is restarted, a conventionally used centrifugal pump 55 is used. Does not have the water self-sufficiency, and when water is newly added to the water tanks 51 and 52, it is necessary to externally operate the water as a priming water to the spiral pump 55. For this reason, conventionally, as described above, it is necessary to provide the cock 58 for bleeding air, so that the water sprinkling circuit becomes complicated, and there is a problem that an operation for operating these cocks 58 is separately required for the operator. Needless to say, since the rolling work starts after the priming work is completed, the work efficiency of the whole rolling work is also inferior.
[0008]
Further, according to the watering circuit shown in FIG. 4B, when the vehicle is located on a slope or the like and a height difference between the water tanks 51 and 52 exceeds a predetermined level, the water tank on the high position side is moved to the low position. Water may move to the water tank on the lower side and overflow from the water tank on the lower position side. In order to prevent this, conventionally, an on-off valve 62 is provided on one of the pipes connected to the water tanks 51 and 52 on the upstream side of the junction 59, and this on-off valve is provided when the vehicle is located on a flat ground. When the vehicle is positioned on a slope or the like, the vehicle is driven with the front rolling wheel on the mountain side and the on-off valve 62 is closed to prevent water from moving to the water tank on the lower position, as shown in FIG. Was. However, opening / closing the on-off valve 62 every time the vehicle is located on a flat ground or a sloped ground places a burden on an operator (usually a driver of the vehicle) and may cause the operator to forget to operate.
[0009]
The present invention has been created to solve the above problems, and is economical, in which the pump function is impaired due to failure of one of the pumps provided in a pair. In particular, it is an object of the present invention to provide a watering apparatus for a compacted vehicle that can water the front rolling wheel side and the rear rolling wheel side.
[0010]
[Means for Solving the Problems]
The present invention, in order to solve the above problems, a plurality of water tanks mounted, a water sprinkling device of a rolling compact vehicle that performs water spraying through a nozzle at a front rolling wheel and a rear rolling wheel of the vehicle, the plurality of water tanks, Pipes are connected in parallel from the water tank to a pair of pumps, and the pipes on the discharge port side of each of the pumps are once merged, and the pipes communicating with the nozzles on the front rolling wheel side and the downstream are downstream of the merged portion. The branch is formed so as to communicate with a conduit communicating with the nozzle on the pressure wheel side.
[0011]
Further, a check valve is provided between each of the pumps and the junction.
[0012]
Further, the pump is constituted by a diaphragm type pump.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a water spray circuit diagram of a water spray device 1 for a compacted vehicle according to the present invention, and FIGS. 2 and 3 are a plan explanatory view and a side view illustrating the water spray device 1 attached to the compacted vehicle, respectively. The rolled vehicle is not particularly limited as long as it has a front rolling wheel 2 and a rear rolling wheel 3 before and after the vehicle body B as shown in FIG. The front rolling wheel 2 and the rear rolling wheel 3 are iron wheels, tires, or the like.
[0014]
In the present embodiment, as shown in FIG. 3, the watering device 1 includes a water tank 4 for the front rolling wheel 2 and a water tank 5 for the rear rolling wheel 3 mounted on the front and rear of the vehicle body B, and a pair of water tanks. The vehicle includes filters 6, 7, a pair of pumps P1, P2, a nozzle 8 for the front rolling wheel 2, and a nozzle 9 for the rear rolling wheel 3. The water tanks 4 and 5 may store, besides mere water, an asphalt anti-adhesion agent composed of mineral oil, an asphalt anti-adhesion agent obtained by mixing mineral oil and water using an emulsifier, and the like. It is appropriately selected depending on conditions and the like.
[0015]
Pipes 10 and 11 are provided above the front rolling wheel 2 and the rear rolling wheel 3 along the upper surface of each rolling wheel in the width direction of the vehicle as shown in FIG. A plurality of the nozzles 8 and 9 are attached to the pipes 10 and 11, respectively. Each of the nozzles 8 and 9 has a minute ejection port, and sprays water in a mist toward each of the rolling wheels. The pair of filters 6 and 7 and the pair of pumps P1 and P2 are disposed near the rear of the center of the vehicle body B as shown in FIG.
[0016]
In the present invention, as shown in FIG. 1, pipes T1 and T2 are connected in parallel from water tanks 4 and 5 to a pair of pumps P1 and P2, and pipes T1a and T2a on the discharge port side of the pumps P1 and P2. A configuration in which the pipes are once merged and branched off downstream of the junction 12 so as to communicate with a pipeline T4 communicating with the nozzle 8 on the front rolling wheel side and a pipeline T5 communicating with the nozzle 9 on the rear rolling wheel side. The main feature is that.
[0017]
Filters 6 and 7 are provided in a pipe T1 connecting the water tank 4 and the pump P1 and a pipe T2 connecting the water tank 5 and the pump P2. As shown in FIG. 2, the pipe T <b> 1 is connected to the front side of the water tank 4 via the connection part 21, and the pipe T <b> 2 is connected to the rear side of the water tank 5 via the connection part 22. In FIG. 1, a pipe line T1a connected to the discharge port of the pump P1 and a pipe line T2a connected to the discharge port of the pump P2 join at a junction 12, and the pipe line T3 after the junction is connected at a branch 13 at a pipe line 13. Branches to T4 and conduit T5. In this embodiment, the check valve 16 is provided in the pipeline T3. The check valve 16 plays a role of preventing residual pressure in the pipeline after the pumps P1 and P2 are stopped and dripping of water due to a siphon phenomenon.
[0018]
The water sprinkling apparatus 1 uses the water stored in the water tanks 4 and 5 as water sprinkling by operating both the pumps P1 and P2 at the time of compaction. Then, during sprinkling, for example, even if one of the pumps P1 fails and its pump function is impaired, the water stored in the water tank 5 by the other pump P2 is supplied to the pipelines T2, T2a, Since the water is supplied to the pipelines T4 and T5 via T3 and the branch portion 13, the water spray from the nozzles 8 and 9 to the front rolling wheel and the rear rolling wheel is continued as it is. Similarly, when the pump P2 fails, the water stored in the water tank 4 is supplied to the pipelines T4 and T5 by the pump P1, so that watering is continued. As described above, according to the present invention, even if one of the pump functions of the pair of pumps P1 and P2 is impaired, water can be sprinkled on the front rolling wheel side and the rear rolling wheel side. In addition, since it is not necessary to interrupt the rolling work, the work efficiency of the rolling work is improved.
[0019]
Further, by providing check valves (check valves 14 and 15) between the pumps P1 and P2 and the merging section 12, that is, the pipes T1a and T2a, respectively, for example, when the compacted vehicle is on an inclined ground. Even if there is, the backflow of water from the junction 12 to the water tank 4 or the water tank 5 can be reliably prevented. Of course, even if one of the pumps P1 and P2 fails, the backflow of water from the junction 12 to the water tank 4 or the water tank 5 can be reliably prevented.
[0020]
As the pumps P1 and P2, a pump having a so-called water self-sufficiency capable of introducing water into the pump only by the function of the pump from a state where the water is not filled is used, so that the pump P1 and P2 can be provided on the downstream side of the pump as in the related art. In addition, there is no need to provide a cock or valve for bleeding air for priming, and a simple water spray circuit is provided. In the present embodiment, since the check valve 16 is provided as described above, the pumps P1 and P2 are pumps that can pump water against the urging force of the check valve 16.
[0021]
This eliminates the need for a priming operation such as operation of a cock or a valve for bleeding air, so that the labor burden on the operator is reduced and the compaction operation can be started quickly. As such a pump, a diaphragm type pump is preferable. Since the diaphragm type pump is inexpensive as compared with the centrifugal pump, it can be used as the economical water sprinkling device 1. Since the diaphragm type pump has a built-in check valve due to its structural characteristics, if a diaphragm type pump is used as the pumps P1 and P2, it is not necessary to provide the check valves 14 and 15 outside the pump, and the watering circuit Can be simplified and the watering apparatus 1 can be easily assembled.
[0022]
The preferred embodiments of the present invention have been described above. The present invention is not limited to the embodiment described above, and the design, the shape, the layout, the number, and the like of each component can be appropriately changed without departing from the gist thereof.
[0023]
【The invention's effect】
According to the present invention, the following effects can be obtained.
(1) Pipes connected in parallel from a plurality of water tanks to a pair of pumps, pipes on the discharge port side of each pump are once merged, and a pipe communicating with a nozzle on the front rolling wheel side downstream of the merged portion. If it is configured to branch so as to communicate with the passage and the pipeline communicating with the nozzle on the rear rolling wheel side, even if the pump function of one of the pair of pumps is impaired, the front rolling wheel Since the water can be sprinkled on the side and the rear rolling wheel side and there is no need to interrupt the rolling work, the work efficiency of the rolling work is improved.
(2) If a check valve is provided between each pump and the junction, a case where the compacted vehicle is on a slope or a function of one of the pair of pumps is impaired. Even in this case, the backflow of water from the junction to the water tank can be reliably prevented.
(3) By forming the pump from a diaphragm type pump, there is no need to provide a cock or valve for bleeding air for priming, and a simple water spray circuit is provided.
In addition, since a priming operation such as operation of a cock or a valve for bleeding air is not required, the labor burden on the operator is reduced, and the rolling operation can be started quickly.
[Brief description of the drawings]
FIG. 1 is a watering circuit diagram of a watering device for a compacted vehicle according to the present invention.
FIG. 2 is an explanatory plan view showing a watering device attached to a compacted vehicle.
FIG. 3 is an explanatory side view showing a sprinkler attached to the compacted vehicle.
4 (a) and 4 (b) are watering circuit diagrams of a conventional watering device.
[Explanation of symbols]
P1, P2 Pump 1 Sprinkler 2 Front rolling wheel 3 Rear rolling wheel 4, 5 Water tank 8, 9 Nozzle 12 Merging part 13 Branch part

Claims (3)

A watering device for a compacted vehicle that carries a plurality of water tanks and sprays water through nozzles at a front compaction wheel and a rear compaction wheel of the vehicle,
Piping in parallel from the plurality of water tanks to a pair of pumps,
The pipes on the discharge port side of each of the pumps are once merged, and on the downstream side of the merging portion, a pipe communicating with the nozzle on the front rolling wheel and a pipe communicating with the nozzle on the rear rolling wheel. A water sprinkling device for a compacted vehicle, wherein the water sprinkling device is configured to be branched so as to communicate therewith. The water sprinkling device for a compacted vehicle according to claim 1, wherein a check valve is provided between each of the pumps and the junction. The water spray device for a compacted vehicle according to claim 1 or 2, wherein the pump is a diaphragm type pump.

Images