JP3477891B2 - Watering equipment for industrial vehicles - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sprinkler device for spraying water in a water tank from a nozzle through a spray pipe by a pump arranged at a position lower than a bottom surface of the water tank, The present invention relates to a sprinkler suitable for an industrial vehicle mounted on a vehicle such as a compaction roller vehicle or a cleaning vehicle.

[0002]

BACKGROUND OF THE INVENTION Industrial vehicles, conventionally, for example, in the case of compaction roller wheel, as shown in FIG. 5, the rolling pressure tire 4 as the rear wheels
The water in the water tank 6 placed above the
Prepared in the front and back from a plurality of nozzles 16, 16 mounted on the spray pipes 8 and 8 arranged at a lower position, for example, through spray pipes 8 and 8 arranged front and back by a centrifugal pump 7. A water sprinkling device for spraying the outer peripheral surfaces of the compaction roller 3 and compaction tire 4 is mounted. This water sprinkling device is provided with a check valve 12 that connects a downstream position of the pump 7 (the discharge flow path 9d) and an opening hole 18 formed in the bottom surface of the water tank 6 and is closed by a water pressure applied from the pump side. The air vent channel 9b was provided.

[0003]

When the inside of the water tank is emptied to prevent freezing or the water is used up until the inside of the water tank becomes empty, air is sucked into the pump chamber. When the pump is a spiral type, if air remains in the pump chamber, even if the water tank is replenished with water and the pump is started, the residual air is diffused into the pump chamber by the impeller, resulting in sufficient discharge. No pressure is available to supply water to the spray pipe. Even if the air vent channel 9b is provided, the water in the water tank 6 enters the air vent channel 9b, and the discharge pressure of the pump 7 does not sufficiently act on the air vent channel 9b. Road 9b
The actual situation was that the air was not bleeded from the tank and water could not be ejected forever. Therefore, conventionally, after water supply,
It was necessary to start the pump 7, open the drain cock 19 provided in the pump 7 to discharge the air in the pump chamber together with the water, and close the drain cock when the air bleeding is finished. . Therefore, the air bleeding operation is troublesome, and it takes a considerable time to completely bleed the air in the pump.

[0004]

Air, which is lighter than water, has the property of gathering in the upper part of the pump chamber. Therefore, the present invention is a sprinkler device that simplifies the air bleeding operation and can completely bleed the air in the pump by effectively utilizing its characteristics. Make an air vent hole at the top of the chamber,
The opening and closing means is installed in the air vent hole, and the air
-Place the air outlet communicating with the vent hole in the water tank.
In that is opened from the feed opening at the top to least pumps that. As a means for opening and closing the air vent hole, it is possible to employ a check valve that is not closed by air pressure from the pump chamber but is closed by water pressure.

[0005]

[Function] If the air vent hole is opened when water is supplied to the water tank, the air in the pump chamber is exhausted from the opened air vent hole by the water supply to the tank, and the air in the pump chamber is completely evacuated. be able to. The Thus also, the air outlet communicating with the air vent hole was opened to above the delivery port to at least the pump in the water tank
The water that is discharged together with the air can be collected in the tank, and if a check valve that does not close with the air pressure from the pump chamber but operates with water pressure is used as the opening / closing means, the air will be automatically After discharging, the air outlet can be closed automatically.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a watering device for an industrial vehicle according to the present invention is mounted on a roller compactor roller will be described with reference to the drawings. First will be described. Compaction roller cars, in FIG. 1 (a),
As shown in (b) , a vehicle body 2 having a steering operation portion 1 such as a steering wheel in the center has rolling rollers 3 as front wheels rotatably provided at the front and at the rear. A support frame 2a that rotatably supports a compaction tire 4 as a rear wheel is attached so as to be steerable in the left-right direction. The compaction tire 4 is used as a driving wheel, and the rotation of an engine (not shown) is transmitted to the driving wheel. A seat 5 is attached to the vehicle body 2 at a position corresponding to an upper portion of the compaction tire 4.

In the vehicle body 2, a water tank 6 is provided under the seat 5, and a centrifugal pump having an impeller is provided at a position lower than the water tank 6 between the two compaction rollers 3 and 4. 7
Is provided, and spray pipes 8, 8 are arranged parallel to the axes of the respective pressure rollers 3, 4 at positions closer to the outer peripheral surfaces of the respective pressure rollers 3, 4. The front spray pipe 8 is attached to the vehicle body 2, and the rear spray pipe 8 is attached to the support frame 2a. A water sprinkler is configured by connecting the water tank 6, the pump 7, and the spray pipe 8 through the flow path 9. The car body 2
In the case of a rolling roller vehicle in which the front body and the rear vehicle body are rollably supported by rolling rollers, respectively, and the rear vehicle body is steerably connected to the front vehicle body, The spray pipes 8 and 8 are attached to the front and rear vehicle bodies, respectively.

Next, the water sprinkler will be described in detail. In FIG. 2, the water tank 6 is provided with a water supply port 6a at its upper part and is normally closed by a lid 6b. A suction passage 9a communicating with the suction inlet 7a of the pump 7 is connected to the pump outlet of the water intake portion 6c which is recessed one step lower in the bottom surface, and is formed in the upper wall of the pump chamber of the pump 7. The extension pipe 9c of the air vent passage 9b connected to the air vent hole 10 is penetrated, and the extension pipe 9c is fixed to the water tank 6 so as to extend straightly upward in the water tank, and the air exhaust at the tip is exhausted. The outlet 11 is opened in the upper part of the tank. In the air vent channel 9b, as illustrated in FIG. 3, the ball 12c normally falls into the annular recess 12b of the valve body 12a and separates from the valve seat 12d, and a constant water pressure (from the water tank to the pump When water pressure due to the drop is applied, the ball 12c will
A check valve 12 that is pressed against d and operates to close is inserted and connected.

The discharge port 7b of the pump 7 and each of the spray pipes 8 and 8 have a discharge passage 9d provided with a switching valve 13.
The check valve 14 is connected to the discharge passage 9d.
And the filter 15 are respectively inserted and connected. As the check valve 14, as shown in FIG. 4, a structure including a spring 14a is applied in order to prevent water leakage due to the action of the pressure head. Further, a plurality of nozzles 16, 16 ... For injecting water onto the surfaces of the compaction roller 3 and compaction tire 4 are mounted on each spray pipe 8, 8.
Reference numeral 19 in the drawing denotes a drain cock.

In the sprinkler thus formed, when the pump 7 is started, the water in the water tank 6 is sucked by the rotation of the impeller and discharged from the discharge port 7b, and the check valve 14 is opened by the discharge pressure. Switch valve 13
Nozzle 1 which is sent to the spray pipe 8 or (8) selected by and is attached to the spray pipe 8 or (8).
Ejected from 6, 16 ... When the water in the water tank 6 becomes low, water is added from the water supply port 6a as needed. When the water in the water tank 6 is used up and the water in the water tank 1 is emptied, the water in the suction passage 9a is exhausted and the air enters the pump 7, and the pump 7 is stopped. Even when the check valve 12 is operated, the water pressure in the pump chamber of the pump 7 decreases.
The ball 12c is separated from the valve seat 12d, and the ball 12c is opened. Further, in order to prevent freezing, when the water in the water tank 1 is completely discharged by opening the drain cock 19, the water in the pump chamber of the pump 7 and the air vent channel 9b is also discharged, and the pump 7
Air collects inside. Next, when the pump 7 is stopped and water is injected from the water supply port 6a, the water flows from the water intake portion 6b into the suction flow passage 9a, and the air accumulated in the suction flow passage 9a and the upper portion of the pump chamber in the pump 7 is replaced with air. Hole 1
From 0, it is pushed out to the air outlet 11 through the air vent channel 9b, and then water flows into the air vent channel 9b to complete the air vent. When the pump 7 is operated in this state, the water pressure in the pump chamber increases, and the water pressure causes the check valve 12 to close. Check valve 12
Is closed, the pressure in the pump chamber rises, water is supplied to the spray pipes 8 and 8, and water is ejected from the nozzle 16. Even when water is supplied to the tank 6 while the pump 7 is operating, air can be bleed in the same manner as described above, and jetting of water can be restarted.

Even if the air outlet 11 for submersible water is submerged in water,
The air outlet 11 is located at a position higher than the water intake 6c,
Since the water pressure acting from the pump side is always higher, the check valve 12 maintains the closed state, and the air in the air vent channel 9b does not flow back to the pump side.

In the embodiment, an air vent hole is formed in the upper part of the pump chamber of a centrifugal pump, and an extension pipe 9c of an air vent channel 9b connected to the air vent hole 10 penetrates the bottom surface of the water tank 6. Then, the air outlet 11 at the tip was opened to the upper part in the water tank 6, but this air vent structure is
Not only the centrifugal pump but also other volute pumps can be applied, and the piping of the air vent channel 9b can be applied to the air outlet 1 from the side surface or the upper surface of the water tank 6 as shown by the chain double-dashed line in FIG.
There is no problem even if 1 is opened to the upper part in the water tank. In this sprinkler, the air outlet communicating with the air vent is opened at a position higher than the bottom surface in the water tank, and a check valve that is closed by water pressure is attached to the air vent passage. At this time, the air discharged from the air vent hole is automatically collected by collecting the water in the water tank and supplying the water . Also, the illustration is omitted.
Although omitted, a cock that is manually operated as the opening / closing means may be employed, or an electromagnetic valve that is opened / closed by an electrical means may be controlled by a switch operation or the like. Although the embodiment has described the water sprinkler device mounted on the roller compactor roller, the sprinkler device may be mounted on another vehicle such as a cleaning vehicle, and the type of industrial vehicle to be mounted is not limited to the embodiment.

[0013]

According to the present invention, when the water in the water tank has been used up, the water in the pump is supplied by supplying water into the tank by releasing the water drain hole formed in the upper part of the pump chamber. It is possible to completely remove the water, and by opening the air outlet communicating with the air vent hole at least above the outlet to the pump in the water tank, the water discharged during air bleeding is removed. It can be efficiently collected in the water tank, and if a check valve that is closed by the water pressure from the pump chamber is used as the opening / closing means for the air vent hole, the air is automatically vented by simply supplying water. Further, the present invention exerts a remarkable effect when the pump is of the spiral type, particularly the centrifugal type.

[Brief description of drawings]

1A and 1B are explanatory views of a compaction roller vehicle equipped with a water sprinkler according to the present invention.

FIG. 2 is an explanatory diagram of a water sprinkler.

FIG. 3 is an explanatory diagram of a check valve provided in an air vent channel.

FIG. 4 is an explanatory diagram of a check valve provided in a discharge passage.

FIG. 5 is an explanatory diagram of a conventional example.

[Explanation of symbols]

1 ... Driving operation unit, 2 ... Car body, 2a ... Support frame, 3 ...
・ Rolling rollers, 4 ・ ・ Rolling tires, 5 ・ ・ Seats, 6 ・ ・
Water tank, 6a ... Water inlet, 6b ... Lid, 6c ... Intake part, 7 ... Pump, 7a ... Suction port, 8 ... Spray pipe, 9 ... Flow path, 9a ... , 9b ...
Air vent channel, 9c ··· Extension pipe, 9d ·· Discharge channel, 10 · · Air vent hole, 11 · · Air outlet port, 1
2 ... Check valve, 12a ... Valve body, 12b
..Annular recesses, 12c..balls, 12d..valve seats, 1
3 ... Switching valve, 14 ... Check valve, 14
a..spring 15..filter, 16..nozzle 1
7 ... Cock, 18 ... Opening hole, 19 ... Drain cock

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E01C 19/22-19/43 E01H 3/02 E01C 19/16 B05B 17/00 101

Claims (2)

(57) [Claims] 1. An industrial vehicle sprinkler system in which water in the water tank is sprayed from a nozzle through a spray pipe by a pump arranged at a position lower than a bottom surface of the water tank, and an upper part of a pump chamber of the pump. the air vent hole is formed in, Ru provided an opening and closing means to the air vent hole
At the same time, the air outlet communicating with the air vent hole,
It was opened to above the delivery port to at least the pump that put in the water tank industrial vehicle sprinkling apparatus according to claim. 2. The water pressure from the pump chamber
Industrial vehicle sprinkling apparatus according to claim 1 which is check valves that in closing operation.