JPH0442333Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a water sprinkling device for a rolling press machine for sprinkling water on the rolling wheels of the rolling machine.

(Prior Art) When rolling an asphalt pavement surface using a road roller or the like, in order to prevent the asphalt mixture melted at high temperature from adhering to the roller surface of the running road roller and impairing the rolling effect, the roller water to form a water film between the asphalt surface and the roller surface to prevent asphalt from adhering to the roller side.

As shown in Figure 4, the device for watering this roller comprises a tank 1, a lid 2 for filling water, and a drain line 3 equipped with a drain valve 3a, an underwater pump 4 placed inside the tank 1, and a water spray line 5 connected to the outlet of the underwater pump 4. The water spray line 5 has various parts connected in series, including a shut-off valve 6 and a filter 7, leading to a sprinkler 8.

As shown in FIG. 5, the submersible pump 4 has an impeller 11 directly connected to a shaft 10 of a motor 9, sucks water from a strainer 12 at the lower end, passes through the impeller 11, and flows through a water conduit 13 provided on the outer periphery of the motor 9. Water is supplied from the upper end 4a of the submersible pump 4 to the watering line 5.

(Problem to be solved by the invention) In the conventional watering device described above, when the watering device is not used in cold weather, the water in the tank 1 is drained from the drain line 3 by opening the drain valve 3a, and the water in the tank 1 is drained from the drain line 3. To prevent accidents caused by freezing of water, the front shroud side sealing material 4b attached to the case side around the impeller 11 of the submersible pump 4 prevents water from flowing between the front shroud 11a of the impeller 11 and the pump case 4c. remains and this residual water freezes, so even if you try to start the motor 9 by pouring water into the tank 1 from the lid 2 when starting the next watering system, the impeller 11 will not rotate and the water will not flow to the watering line 5 side. There was a problem with the lack of water supply.

The present invention was created in view of the above problems, and by injecting antifreeze into the tank via a submersible pump after draining the water in the tank, it is possible to prevent freezing inside the tank, thereby solving the above problems. It is an object of the present invention to provide a water sprinkler device for a rolling compaction machine that solves the problem.

(Means for solving the problems) As a means for solving the above problems, the present invention provides a water sprinkler device for a rolling machine,
It comprises an underwater pump installed in a water tank, a sprinkler line that sprays water onto a roller connected to the underwater pump, a switching valve connected to the sprinkler line, an antifreeze supply line that injects antifreeze into the underwater pump via the switching valve, and an antifreeze tank to which the antifreeze supply line is connected.

In this case, in practice, it is desirable that the impeller used in the submersible pump be equipped with an impeller without a front shroud.

(Function) With the above configuration, the present invention drains water from the water tank in cold weather when the water sprinkler is not in use, and immediately after draining the water, antifreeze is poured from the antifreeze tank into the submersible pump through the antifreeze supply line, and then antifreeze is poured into the water tank. This prevents the water remaining in the water tank and submersible pump from freezing, making it easier to start the sprinkler system in cold weather and avoiding problems caused by water freezing.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3. As shown in Figure 1, water tank 1
5, a water injection pipe 16 is connected to the top, and a water sprinkling pipe 17 is connected to the bottom. Drainage piping 17
A shut-off valve 18 is connected to the tank to allow necessary water drainage. An antifreeze tank 19 is placed on the top surface of the water tank 15, and a submersible pump 20 is placed inside the water tank 15. A watering line 5 that supplies water from the submersible pump 20 to the filter 7 and sprinkler 8 through piping 23, and an antifreeze tank 19.
Pass the antifreeze supply line 21 and piping 23 from
The antifreeze supply line 21 that supplies antifreeze to the water tank 15 via the submersible pump 20 is the switching valve 22.
The switching valve 22 connects the submersible pump 20 to the submersible pump 20 so that the flow direction can be switched, and the piping 23 between the switching valve 22 and the submersible pump 20 is shared in one system.

As shown in FIG. 2, the submersible pump 20 is waterproof and has a partition 25a inside, and a motor 26 is installed in a motor chamber M of a case 25, which is defined into an upper motor chamber M and a lower lubricating oil chamber 30. An impeller 28 that is directly connected to the shaft 27 of the motor 26 is disposed at the lower end of the case 25, and a lubricating oil chamber 30 between the motor 26 and the impeller 28 is filled with lubricating oil 29.
case 25 located between 6 and impeller 28,
Bearing 3 is attached to the 35 side bearing mounting portions 25b and 35a.
1 and 32 are arranged so that a part thereof is immersed in the lubricating oil 29 to sufficiently lubricate them, and
Isolate motor 26 from water.

The impeller 28 is formed in a shape without a front shroud, and a submersible pump inlet member 33 is detachably attached to the lower end of the case 25 with a predetermined clearance from the front surface of the impeller 28, and a predetermined submersible pump inlet area is formed at the submersible pump inlet. It is defined by the member 33 and has a shape that does not form a concave portion in which water may accumulate in the waterway between the impeller 28 and the case 25 after draining.

The water outlet of the submersible pump 20 is opened in a discharge pipe 34 that protrudes in the circumferential direction at the impeller outer circumferential position of the case 25, and a flange 3 provided at the tip of this discharge pipe 34.
A pipe 23 is connected to 4a so that water can be supplied to the switching valve 22 side and antifreeze can be received from the switching valve 22 side. Therefore, the water for sprinkling passes through the submersible pump 20 or piping 23, and is sprayed onto the rollers 24 from the sprinkler 8 through the sprinkler pipe 5 of the switching valve 22 and through the filter 7.

By configuring the embodiment as described above, when the water sprinkler is not used in cold weather, the water in the water tank 15 is drained by opening the cutoff valve 18, and after draining, the switching valve 22 is set to the antifreeze supply side to drain the water. Pour antifreeze into pump 20. submersible pump 2
The antifreeze flowing to the impeller 28 from the discharge pipe 34
The water passes through the submersible pump inlet member 33 and flows out from the submersible pump inlet side to the water tank 15. Supply antifreeze into the water tank to the extent that the impeller 28 is submerged,
Impeller 2 of submersible pump 20 at the start of cold use
Make sure 8 is not frozen.

When using a water sprinkler, pipe 1 for water injection
6 to fill the water tank 15, the switching valve 22 is set to the water supply side to the water sprinkling line 5, the submersible pump 20 is started, and water is supplied to the filter 7 and sprinkler 8 side. When the submersible pump 20 is started, the submersible pump 20 is filled with antifreeze diluted with water, and the motor 26 and impeller 28
There is nothing blocking the rotation of the machine, so it starts up smoothly and starts discharging water.

In this way, in this embodiment, antifreeze is supplied to the water tank through the submersible pump 20 when the water sprinkler is not used, and it is possible to prevent the submersible pump 20 from becoming inoperable due to freezing of water at the beginning of use.
It can be started smoothly, does not interfere with the use of the rolling machine, saves startup time at the start of work, and improves the efficiency of rolling work.

(Effects of the invention) As described above, the present invention allows antifreeze to be supplied from the antifreeze tank to the water tank via the submersible pump, thereby making it possible to drain water remaining in the submersible pump through the antifreeze. With,
Prevents freezing and allows submersible pumps to smoothly start and supply water when using water sprinklers,
It is possible to improve the utilization efficiency of the rolling machine and improve the efficiency of rolling work.

[Brief explanation of the drawing]

Fig. 1 of the embodiment is a system explanatory diagram showing the area around the water tank of the water sprinkling device according to the present invention, Fig. 2 is a vertical sectional view showing a submersible pump used in the water sprinkling device according to the present invention, and Fig. 3 is a water sprinkling system according to the present invention. FIG. 4 is a system explanatory diagram showing a conventional water sprinkling device; FIG. 5 is a vertical sectional view showing a submersible pump used in the conventional water sprinkling device. 5... Watering line, 15... Water tank, 17...
...Piping, 18...Shutoff valve, 19...Antifreeze tank, 20...Submersible pump, 21...Antifreeze supply line, 22...Switching valve, 23...Piping, 25...
Case, 26...Motor, 27...Axis, 28...
Impeller, 29... Lubricating oil, 31, 32... Bearing, 33... Pump inlet member.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A submersible pump installed in a water tank, a water sprinkling line connected to the submersible pump for sprinkling water on a compaction wheel, a switching valve connected to the water sprinkling line, and the switching valve. A water sprinkling device for a compaction machine, comprising: an antifreeze supply line for injecting antifreeze to the submersible pump side through the submersible pump; and an antifreeze tank to which the antifreeze supply line is connected. (2) The water sprinkling device for a rolling compaction machine according to claim (1) of the utility model registration, characterized in that the impeller used in the submersible pump is formed in a shape without a front shroud.