阅读说明：本技术 一种车载式大流量泡沫比例混合系统 (Vehicle-mounted high-flow foam proportional mixing system ) 是由 李博 崔献奎 陈萍 李红文 李锁龙 伍中南 石金山 胡红云 李清明 李新华 杨亮 于 2021-03-19 设计创作，主要内容包括：本发明公开了一种车载式大流量泡沫比例混合系统,包括泡沫泵、泡沫管和水管,所述的泡沫泵为大排量变量泵,通过液压马达驱动,所述泡沫泵的出口管道上依次连接有泡沫压力传感器、泡沫流量计、流量调节阀、泡沫开关阀；所述水管上设有水压传感器、水流量计。本发明的泡沫泵是大排量变量泵,通过电比例液压阀控制转速的液压马达驱动,并结合泡沫管路上设置的流量调节阀,共同控制、调节泡沫管路的泡沫流量,可以实现泡沫混合比例在0.1%-10%范围内的无极调节。(The invention discloses a vehicle-mounted high-flow foam proportional mixing system which comprises a foam pump, a foam pipe and a water pipe, wherein the foam pump is a large-discharge variable pump and is driven by a hydraulic motor, and an outlet pipeline of the foam pump is sequentially connected with a foam pressure sensor, a foam flowmeter, a flow regulating valve and a foam switch valve; and a water pressure sensor and a water flow meter are arranged on the water pipe. The foam pump is a large-displacement pump, is driven by a hydraulic motor with the rotating speed controlled by an electric proportional hydraulic valve, and is combined with a flow regulating valve arranged on a foam pipeline to jointly control and regulate the foam flow of the foam pipeline, so that the stepless regulation of the foam mixing proportion within the range of 0.1-10% can be realized.)

1. The utility model provides a large-traffic foam proportion hybrid system of vehicular, includes foam pump, foam pipe and water pipe, its characterized in that: the foam pump is a large-displacement variable pump and is driven by a hydraulic motor, and an outlet pipeline of the foam pump is sequentially connected with a foam pressure sensor, a foam flowmeter, a flow regulating valve and a foam switch valve; and a water pressure sensor and a water flow meter are arranged on the water pipe.

2. The vehicle-mounted high-flow foam proportional mixing system according to claim 1, characterized in that: the hydraulic motor is connected with the hydraulic pump and the electric proportional hydraulic valve through a hydraulic pipe.

3. The vehicle-mounted high-flow foam proportional mixing system according to claim 1, characterized in that: the foam pressure sensor, the foam flowmeter, the water pressure sensor and the water flowmeter are respectively provided with an input signal line to be connected with the input end of the electric control module, and the output end of the electric control module is provided with an output signal line to be connected with the flow regulating valve and the electric proportional hydraulic valve.

4. The vehicle-mounted high-flow foam proportional mixing system according to claim 1, characterized in that: the flow control valve is internally provided with a valve block which is of an elliptical structure and is connected with an adjusting rod and a direct current motor.

5. The vehicle-mounted high-flow foam proportional mixing system according to claim 1, characterized in that: the hydraulic motor driving shaft is connected with the foam pump driving shaft through an elastic coupling.

Technical Field

The invention relates to a foam proportion mixing system for fire fighting and extinguishment, in particular to a vehicle-mounted high-flow foam proportion mixing system.

Background

The fire-fighting foam system is characterized in that after water and foam liquid are fully mixed, foamed foam mixed liquid is formed in a foam foaming device, the surface of a combustion object is covered by utilizing the characteristics that the foam mixed liquid is heavier than air and lighter than the combustion object, the combustion object is isolated from the air, the temperature of the combustion object is reduced, and the purposes of flame retardance and fire extinguishment are further achieved. The vehicle-mounted fire-fighting foam system is an important component of a fire fighting truck, the foam proportion mixing system is an important factor related to the fire fighting efficiency of the fire fighting truck, the flow regulation range of the conventional vehicle-mounted foam proportion mixing system is very small, the regulation range is generally smaller than 1%, or the regulation ratio is regulated according to 3% and 6% of gears, and stepless regulation in the large flow range cannot be realized.

Disclosure of Invention

The invention aims to provide a vehicle-mounted foam proportion mixing system capable of steplessly adjusting large flow, wherein a foam pump is a large-discharge-capacity pump, is driven by a hydraulic motor with a rotating speed controlled by an electric proportional hydraulic valve, and is combined with a flow adjusting valve arranged on a foam pipeline to jointly control and adjust the foam flow of the foam pipeline so as to realize the steplessly adjusting of the foam mixing proportion within the range of 0.1-10%.

The invention adopts the technical scheme that the vehicle-mounted high-flow foam proportional mixing system comprises a foam pump, a foam pipe and a water pipe, wherein the foam pump is a large-discharge-capacity pump and is driven by a hydraulic motor, and an outlet pipeline of the foam pump is sequentially connected with a foam pressure sensor, a foam flowmeter, a flow regulating valve and a foam switch valve; and a water pressure sensor and a water flow meter are arranged on the water pipe.

As a further improvement of the technical scheme, the hydraulic motor is connected with the hydraulic pump and the electric proportional hydraulic valve through a hydraulic pipe, the hydraulic flow entering the hydraulic motor is adjusted through the electric proportional hydraulic valve, the rotating speed of the hydraulic motor is changed, the rotating speed of the foam pump is changed, and then the flow of the foam pump is adjusted.

As a further improvement of the technical scheme, the foam pressure sensor, the foam flow meter, the water pressure sensor and the water flow meter are respectively provided with an input signal line to be connected with the input end of the electric control module, and the output end of the electric control module is provided with an output signal line to be connected with the flow regulating valve and the electric proportional hydraulic valve.

As a further improvement of the technical scheme, a filter is arranged between the inlet pipeline of the foam pump and the foam pipe.

As a further improvement of the technical scheme, a rotary valve plate is arranged in the flow regulating valve and connected with the rotary valve plate to change the sectional area of the foam pipe and regulate the foam flow.

As a further improvement of the technical scheme, the hydraulic motor driving shaft and the foam pump driving shaft are connected through an elastic coupling.

The foam pump is a large-displacement pump, is driven by a hydraulic motor with the rotating speed controlled by an electric proportional hydraulic valve, and is combined with a flow regulating valve arranged on a foam pipeline to jointly control and regulate the foam flow of the foam pipeline, so that the stepless regulation of the foam mixing proportion within the range of 0.1-10% can be realized.

Drawings

FIG. 1 is a schematic view of the pipeline connection of the vehicle-mounted high-flow foam proportional mixing system of the present invention.

Fig. 2 is a schematic structural diagram of a vehicle-mounted high-flow foam proportional mixing system according to the present invention.

Fig. 3 is a schematic diagram of the operation of the hydraulic motor driven regulated foam pump of fig. 2.

Fig. 4 is a schematic view of the installation of the hydraulic motor and foam pump shown in fig. 2.

Fig. 5 is a schematic structural view of the flow rate regulating valve.

Wherein, 1, foam liquid tank; 2. a water tank; 3. a fire pump; 4. an air compressor; 5. a foam proportion mixing system; 6. a water pipe; 7. a foam tube; 8. a foam gun; 9. fire monitor; 10. an air tube; 51. a foam filter; 52. a hydraulic motor; 53. a foam pump; 54. a foam pressure sensor; 55. a foam flow meter; 56. a flow regulating valve; 57. a foam on-off valve; 58. a water pressure sensor; 59. a water flow meter; 521. a hydraulic pump; 522. an electro-proportional hydraulic valve; 523. an elastic coupling; 561. a valve body; 562. rotating the valve plate; 563. adjusting a rod; 564. a direct current motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.

As shown in figure 1, the pipeline connection diagram of the vehicle-mounted large-flow foam proportion mixing system is applied, a foam inlet of the foam proportion mixing system 5 is connected with a foam liquid tank 1 through a foam pipe 7, and a water pipe inlet is connected with a water tank 2 through a fire pump 3. And a pressurizing system consisting of an air compressor 4 and an air pipe 10, a foam gun 8 and a fire monitor 9 are arranged on an outlet pipeline of the foam proportion mixing system.

As shown in fig. 2, the invention is a vehicle-mounted high-flow foam proportional mixing system, which is specifically composed of a hydraulic motor 52, a foam filter 51, a foam pressure sensor 54, a foam flow meter 55, a flow regulating valve 56, a foam switch valve 57, a water pressure sensor 58 and a water flow meter 59, wherein a foam pump 53 is driven by the hydraulic motor, an inlet pipeline of the foam pump is connected with the foam filter, an outlet pipeline of the foam pump is connected with the foam pressure sensor, the foam flow meter, the flow regulating valve and the foam switch valve, an outlet pipeline of the foam switch valve is connected with a water outlet pipe, and the water outlet pipe is provided with the water pressure sensor and the water flow meter. The foam pressure sensor, the foam flowmeter, the water pressure sensor and the water flowmeter are respectively provided with an input signal line to be connected with the input end of the electric control module, and the output end of the electric control module is provided with an output signal line to be connected with the flow regulating valve and the electric proportional hydraulic valve.

As can be seen from fig. 3, the hydraulic motor 52 is connected to the hydraulic pump 521 and the electric proportional hydraulic valve 522 through a hydraulic pipe, and the flow rate of the hydraulic fluid entering the hydraulic motor is adjusted by the electric proportional hydraulic valve, so as to change the rotation speed of the hydraulic motor, change the rotation speed of the foam pump, and further adjust the flow rate of the foam pump.

As can be seen from fig. 4, the hydraulic motor drive shaft and the foam pump drive shaft are connected by a resilient coupling.

As can be seen from fig. 5, a rotary valve plate 562 is disposed inside the flow regulating valve, and the rotary valve plate is connected to change the sectional area of the foam pipe, so as to regulate the foam flow.

The working process of the invention is as follows: the foam liquid in the foam liquid tank enters a foam pump through a foam pipe, the foam flow is regulated through a foam pump and a flow regulating valve which are driven by a hydraulic motor, and the foam flow is measured through a foam flowmeter; meanwhile, water in the water tank enters the water pipe through the fire pump and is measured by the water pressure sensor and the water flow meter; the measured foam liquid and water are mixed in a water pipe, compressed air is output by an air compressor and mixed into foam mixed liquid, and finally the foam mixed liquid is sprayed out by a foam gun or a fire monitor.

The beneficial effect of adopting above technical scheme is: the foam pump is a large-displacement pump, is driven by a hydraulic motor with the rotating speed controlled by an electric proportional hydraulic valve, and is combined with a flow regulating valve arranged on a foam pipeline to jointly control and regulate the foam flow of the foam pipeline, so that the stepless regulation of the foam mixing proportion within the range of 0.1-10% can be realized.

The embodiments of the present invention are described only for the preferred embodiments of the present invention, and not for the limitation of the concept and scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the design concept of the present invention shall fall into the protection scope of the present invention, and the technical content of the present invention which is claimed is fully set forth in the claims.