WO2014040350A1

WO2014040350A1 - High and low pressure integrated water sprinkler system and engineering machinery

Info

Publication number: WO2014040350A1
Application number: PCT/CN2012/086003
Authority: WO
Inventors: 刘智彪; 赵明辉; 汪建利
Original assignee: 湖南三一智能控制设备有限公司; 三一重工股份有限公司
Priority date: 2012-09-12
Filing date: 2012-12-06
Publication date: 2014-03-20
Also published as: CN102828460B; CN102828460A

Abstract

Disclosed is a high and low pressure integrated water sprinkler system, comprising a water pump (3), a power source (6), a low pressure waterway and a high pressure waterway, wherein a water inlet of the water pump (3) is connected to the water source; the power source (6) is connected to the water pump (3); a water outlet of the water pump (3) is respectively connected to the low pressure waterway and the high pressure waterway; and the water outlet of the water pump (3) is further connected to a switch device (4) for selectively switching into conduction with the low pressure waterway. Further disclosed is engineering machinery with the water sprinkler system. The water sprinkler system has a simple structure, and is able to separately control the high pressure or the low pressure waterway.

Description

High and low pressure integrated sprinkler system and construction machinery The present application claims priority to Chinese patent application filed on September 12, 2012 by the Chinese Patent Office, application number 201210335418.9, and the invention titled "high and low pressure integrated sprinkler system and engineering machinery". The entire content is incorporated herein by reference. Technical field

The invention relates to the field of engineering machinery, in particular to a high and low pressure integrated sprinkling system and a construction machine having the same. Background technique

The road milling machine produces a lot of dust during the working process, and the milling tool scrapes the ground to generate a lot of heat. In order to improve the working environment and prevent overheating, the life of the milling tool is reduced, and atomized water dust reduction and cooling milling tools are commonly used. After the milling machine has been working for a period of time, it is necessary to clean the residual materials (cement, asphalt, etc.) accumulated in the running device, the conveyor, etc. in time to prevent the residue from coagulation and difficult to clean, thereby scratching the surface of the belt or moving parts. The accumulation of residual materials will also affect the heat dissipation of hydraulic components.

To increase the impact of high pressure flushing in order to completely clean the residual material, it is necessary to increase the working pressure of the high pressure flushing system. Therefore, large-scale road milling machines are currently designed with two sets of high-pressure and low-pressure systems. Low-pressure sprinkler system (working pressure 0-20bar), providing atomized water for dust reduction and cooling of milling cutters. The high pressure flushing system (working pressure > 80 bar) cleans the residual material with a high pressure water column. However, the existing road milling machine has a complicated sprinkling system and high cost. In addition, the two systems of high pressure and low pressure have many failure points and high failure rate. Summary of the invention

In view of this, the present invention provides a high and low pressure integrated sprinkler system and the same Construction machinery, the sprinkler system integrates high and low pressure sprinkler pipes, and separately controls high and low pressure waterways, which can not only sprinkle water at low pressure, but also ensure the impact of high pressure flushing.

In order to achieve the above object, an aspect of the present invention provides a high and low pressure integrated water sprinkling system, including a water pump, a power source, a low pressure water path, and a high pressure water path, wherein

The water inlet of the water pump is connected to a water source, the power source is connected to the water pump, and the water outlet of the water pump is respectively connected with the low pressure water channel and the high pressure water channel;

The water outlet of the water pump is also connected to a switching device that selectively turns on the low pressure water circuit. Further, the switching device is an electromagnetic switching valve that is connected in the low pressure water passage. Further, the switch device is a reversing valve, the reversing valve has a water inlet, a first water outlet and a second water outlet, and the water inlet is connected to a water outlet of the water pump, the first water outlet And the second water outlet is connected to the low pressure water passage and the high pressure water passage, respectively.

Further, the low pressure water passage is connected to a pressure setting device configured to adjust a maximum water pressure of the low pressure water passage.

Further, the pressure setting device is an overflow wide or a pressure reducing valve.

Further, the high pressure water passage is connected with a relief valve.

Further, the high pressure water passage has a high pressure end configured to connect the high pressure nozzle, and the high pressure end is provided with a shutoff valve;

and / or,

The low pressure water passage has a plurality of low pressure ends configured to connect to the sprinkler, and at least a portion of the low pressure ends are provided with a shutoff valve.

Further, the flow rate and pressure of the water pump output are adjustable.

Further, the power source is a hydraulic motor or an electric motor.

Another aspect of the present invention also provides a construction machine provided with a high and low pressure integrated water sprinkling system as described above.

The water pump of the high and low pressure integrated sprinkler system of the invention is respectively connected with a water source, a power source and a low pressure water channel, The high-pressure waterway is connected, and the water source is pumped from the water source, and the pressure source of the pressure source is used to generate the pressure water source with different pressures, respectively flowing to the low-pressure water path and the high-pressure water path, and the high-pressure water path is used for connecting the high-pressure flushing gun head, and the low-pressure water path is used for connecting the milling hub Sprinklers and other sprinklers, and the pump is also connected with a switching device, through which the low-pressure water channel can be selectively connected, so that the water pump selectively supplies water to the low-pressure water channel or the high-pressure water channel, which is convenient for the two water paths respectively control. The high and low pressure integrated sprinkling system of the invention integrates high and low pressure sprinkling pipelines, and separately controls the high and low pressure waterways, thereby achieving low pressure sprinkling and ensuring the impact force of high pressure flushing.

The construction machine provided by the present invention has the above-described high and low pressure integrated sprinkling system, and therefore has the same effects as described above. DRAWINGS

The accompanying drawings, which are incorporated in the claims In the drawing:

1 is a schematic structural view of a high and low pressure integrated sprinkler system of the present invention. detailed description

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be further described in detail with reference to Fig. 1. In the embodiment of the present invention, a milling machine is taken as an example to describe in detail the connection and working process of the high and low pressure integrated sprinkler system of the present invention:

As shown in FIG. 1 , an embodiment of a high and low pressure integrated sprinkler system provided by the present invention includes a water pump 3 , a power source 6 , a low pressure water path and a high pressure water path, wherein the water inlet of the water pump 3 is connected to a water source, and the power source 6 is The water pump 3 is connected, and the water outlet of the water pump 3 is respectively connected with the low pressure water path and the high pressure water path, and the low pressure water line is connected with a pressure setting device for adjusting the water pressure of the low pressure water channel, the water pump 3 The water outlet is also connected to a switching device 4 that selectively turns on the low pressure water circuit.

The water pump 3 of the high and low pressure integrated sprinkler system of the present invention is respectively connected with a water source, a power source 6 and a low pressure and high pressure water channel, which pumps water from the water source, and generates power of different pressures by means of the power of the power source 6, respectively, and flows to the low pressure water channel and a high-pressure water passage, a high-pressure water passage for connecting a high-pressure flushing gun head, a low-pressure water passage for connecting a milling hub, a sprinkler and other sprinklers, and in this embodiment, the water pump 3 is further connected with a switching device 4, through which the switching device 4 can select The low-pressure water passage is selectively connected, so that the water pump 3 selectively supplies water to the low-pressure water passage or the high-pressure water passage, thereby facilitating separate control of the two water passages. The high and low pressure integrated sprinkling system of the invention integrates high and low pressure sprinkling pipelines, and separately controls the high and low pressure waterways, thereby achieving low pressure sprinkling and ensuring the impact force of high pressure flushing.

It should be noted that the power source 6 in this embodiment may preferably be a hydraulic motor or an electric motor. The parameters such as the flow rate and pressure of the water pump 3 are preferably adjustable according to the power input of the power source 6, because the high pressure water channel and the low pressure water channel are sprayed. The cross-sectional area of the pipeline is relatively fixed after the system is designed. The change of the rotational speed of the power source 6 will cause the water volume discharged by the pump 3 to change accordingly. In the case where the cross-sectional area of the spray pipeline is fixed, it will indirectly lead to high and low pressure. The pressure of the waterway changes accordingly. Specifically, for example, when the power source 6 inputs power at a low rotational speed, the water pump 3 - the amount of water discharged in a certain period of time is relatively small, and in the case where the cross-sectional area of the pipeline is fixed, it can provide a relatively low water pressure, which can be directly supplied. When the power source 6 inputs power at a high speed, the water pump 3 discharges a large amount of water within a certain period of time. When the cross-sectional area of the pipeline is fixed, it can provide a relatively high water pressure and can be directly used for the high-pressure waterway. , or after pressure adjustment, for use in low pressure waterways. Correspondingly, in the case of working in the low-pressure waterway, the water pressure of the low-pressure waterway can be indirectly adjusted within a certain pressure value by adjusting the rotational speed of the power source 6; similarly, in the case of working in the high-pressure waterway, The water pressure of the high pressure water passage can be adjusted indirectly by adjusting the rotation speed of the power source 6 in a certain pressure value range, so that the high and low pressure integrated water sprinkling system provided by the embodiment of the invention can be adapted to various working conditions.

Alternatively, the water pump 3 of the present invention may be a multi-pump combination, different pumps provide different flow rates, The pressure of the water flow is output, and then different pumps are used to supply water to the waterway according to different water flow requirements. Alternatively, a separate pump in the multi-pump combination can adjust the parameters of the output flow and then activate the pump supply based on the flow demand.

The preferred embodiment of the present invention will be further described in detail below with reference to FIG.

As shown in Fig. 1, the water inlet of the water pump 3 is connected to a water source (or a water tank), and a shutoff valve 1 and a filter 2 are also provided on the water path between the water inlet of the water pump 3 and the water source. The shut-off valve 1 is used as a main switch for the water circuit. The filter 2 prevents debris from entering the waterway and blocks waterways or other components. The water outlets of the water pump 3 are connected to the low pressure water passage and the high pressure water passage, respectively, and in this embodiment, the switch device 4 is connected to the water outlet of the water pump 3 and is disposed in the low pressure water passage. In the embodiment, the switching device 4 is preferably an electromagnetic on-off valve connected in a low-pressure water path and configured to be normally closed. The electromagnetic on-off valve can be electrically connected to the overall control system of the milling machine so that when the milling machine is operating (i.e., forward and the milling hub is rotated), the switching device 4 is opened and the sprinkler behind the milling hub is sprinkled.

It should be understood by those skilled in the art that, as shown in FIG. 1, since the milling machine requires low-pressure water-jet cooling in addition to cooling the milling tool, and other parts or components also require low-pressure atomized water to perform functions such as dust removal, The low-pressure water passage in the embodiment preferably has a plurality of ends, respectively connected to different sprinkler heads, and at least part of the plurality of ends may be provided with a shut-off valve 1 for manual control, only when needed, sprinkling water, it is necessary to pay attention to Preferably, the shut-off valve is not provided before the milling cutter, so that the milling machine can simultaneously open the sprinkler pipe of the milling cutter without manual opening, thereby preventing forgetting or other misoperation of the manual operation, resulting in malfunction.

In order to facilitate the setting of the maximum water pressure for the low-pressure water supply, in addition to providing the expected water pressure by setting the power source 6 and the water pump 3, it is also possible to connect a pressure setting device for adjusting the water pressure on the low-pressure water path, such as As shown in Fig. 1, it is preferable to connect the relief valve 5 to the low-pressure water passage, and set the maximum water pressure of the low-pressure water passage by setting the relief pressure of the relief valve 5. Further, the relief valve 5 can also set the overflow pressure value according to the required water pressure value under different working conditions to obtain various differences. The system pressure meets the requirements of various working conditions. For example, in the low-pressure waterway, when the water pressure supplied by the water pump 3 is higher than the actual required water pressure, the low-pressure water path can be lowered by setting the relief valve 5. The maximum water pressure, and then the water pressure corresponding to the actual needs. Therefore, it is more convenient and practical to adjust the water pressure of the low-pressure waterway by setting and setting the relief valve 5 compared to selecting the suitable power source 6 and the water pump 3 and setting the expected water pressure of the two outputs.

In the embodiment of the present invention, the relief valve 5 is selected as the pressure setting device, and the safety of the low-pressure water passage can be ensured when the water pressure of the low-pressure water passage is too high, thereby avoiding damage to the waterway components when the water pressure is too high.

Correspondingly, the pressure setting device can also be set in the high pressure water passage, and the overflow width 7 is preferably used as the pressure setting device, and the safety of the high pressure water passage can be protected.

As an alternative embodiment of the pressure setting device, the pressure setting device in the above embodiment may be configured as a pressure reducing valve, disposed in the high and low pressure water paths, according to the actual combination of the power source 6 and the water pump 3 and the required water path. The pressure is selected to be a suitable pressure reducing valve, preferably a constant pressure reducing valve. It should be noted that in order to ensure the safety of the waterway when the water pressure is too high, the relief valve can be used with the pressure relief valve to achieve a safe overflow.

As shown in Fig. 1, the end of the high-pressure waterway is also provided with a shut-off valve 1 for the operator of the milling machine to connect the high-pressure flushing water gun at the end of the high-pressure water passage through the shut-off valve 1 switch.

It should be noted that the configuration of the high and low pressure integrated sprinkler system as shown in Fig. 1, that is, the switch device 4 is configured as an electromagnetic on-off valve and is disposed on the low-pressure water path, in addition to the above functions, there is an additional effect. When the water pump 3 is working on water supply, the high pressure water circuit is always kept open, and is kept in communication with the water pump 3. When the switching device 4 of the low pressure water circuit, that is, the electromagnetic switch valve is opened, the water pump 3 supplies water to the high pressure water path and the low pressure water path at the same time. The overflow valve 5 of the waterway and the relief valve 7 of the high-pressure waterway are simultaneously connected in the waterway, and the two relief valves can serve as double protection. When the relief valve 5 fails and cannot overflow normally, it can be overflowed. The valve 7 achieves overflow protection.

Of course, in addition to this configuration, the switching device 4 can also adopt an electromagnetic reversing valve and a three-way A ball valve or the like is connected to the outlet of the water pump 3, and the outlets of the electromagnetic reversing valve or the three-way ball valve are respectively connected to the low pressure water passage and the high pressure water passage. A pressure setting device, a relief valve, a shut-off valve, and the like may be separately disposed in the connected low-pressure water passage and the high-pressure water passage. Other manual directional valves and the like can also be used for the switching device 4.

In view of the various embodiments and preferred embodiments described above, the high and low pressure integrated sprinkler system provided by the present invention has the following advantages:

1. Single pressure water source and single system realize low pressure watering and high pressure flushing function. The system structure is large and large, and the cost and failure rate are greatly reduced.

2. The pressure setting device is designed, and the overflow is used as the pressure setting device to protect the water pump and the whole system from overpressure while realizing the pressure regulation;

3. The system's low-pressure sprinkler and high-pressure flushing can be individually regulated to meet different requirements for water volume and pressure under different working conditions.

Accordingly, there is also provided a construction machine provided with a high and low pressure integrated sprinkler system as described above. As mentioned above, the construction machine is preferably a milling machine.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection. Industrial applicability

The high and low pressure integrated sprinkling system provided by the invention adopts a single pressure water source and a single system to realize low pressure sprinkling and high pressure flushing functions, the system structure is greatly reduced, the cost and the failure rate are greatly reduced; and the water pressure of the waterway is realized by the pressure setting device. It can be adjusted and the pressure can be adjusted separately for high and low pressure waterways to adapt to the different demands of water volume and pressure under different working conditions. Therefore, the present invention has industrial applicability.

Claims

claims

1. A high and low pressure integrated sprinkler system, characterized by including a water pump (3), a power source (6), a low-pressure waterway and a high-pressure waterway, wherein,

The water inlet of the water pump (3) is connected to the water source, the power source (6) is connected to the water pump (3), and the water outlet of the water pump (3) is connected to the low-pressure waterway and the high-pressure waterway respectively;

The water outlet of the water pump (3) is also connected to a switch device (4) that selectively connects the low-pressure water circuit.

2. The high and low pressure integrated sprinkler system according to claim 1, characterized in that the switch device (4) is an electromagnetic switch valve, which is connected in the low pressure waterway.

3. The high and low pressure integrated sprinkler system according to claim 1, characterized in that the switch device (4) is a reversing valve, and the reversing valve has a water inlet, a first water outlet and a second water outlet, The water inlet is connected to the water outlet of the water pump (3), and the first water outlet and the second water outlet are connected to the low-pressure waterway and the high-pressure waterway respectively.

4. The high-low pressure integrated sprinkler system according to any one of claims 1-3, characterized in that the low-pressure waterway is connected to a pressure adjustment device configured to adjust the maximum water pressure of the low-pressure waterway.

5. The high and low pressure integrated sprinkler system according to claim 4, characterized in that the pressure setting device is a relief valve (5) or a pressure reducing valve.

6. The high-low pressure integrated sprinkler system according to claim 5, characterized in that the high-pressure waterway is connected to an overflow valve (7).

7. The high-low pressure integrated sprinkler system according to claim 6, wherein the high-pressure waterway has a high-pressure end configured to connect to a high-pressure nozzle, and the high-pressure end is provided with a stop valve.

( 1 );

and / or ,

The low-pressure waterway has a plurality of low-pressure ends configured to connect sprinkler heads, and at least some of the low-pressure ends are provided with stop valves (1).

8. The high and low pressure integrated sprinkler system according to any one of claims 1 to 3, characterized in that the flow rate and pressure output by the water pump (3) are adjustable.

9. The high and low pressure integrated sprinkler system according to any one of claims 1 to 3, characterized in that the power source (6) is a hydraulic motor or an electric motor.

10. A construction machine, characterized by being equipped with a high and low pressure integrated sprinkler system as described in any one of claims 1-9.