Compressed air foam fire truck and system

Abstract

The utility model discloses a compressed air foam fire fighting truck and a compressed air foam fire fighting system in the technical field of compressed air foam, and aims to solve the problems that a transfer system of a compressed air foam fire fighting system in the prior art is high in assembly precision requirement and occupies the space in the height direction of a vehicle. The air compressor is in transmission connection with the transfer case through a first coupler and can adapt to length and angle errors, the requirement for assembly precision is lowered, and transmission of the air compressor is more stable and reliable; the air compressor and the water pump take power from a vehicle engine to realize single-vehicle operation; through power distribution of the transmission shaft and the transfer case, the occupied size is reduced, the requirement that the air compressor and the water pump are arranged in the length direction of the vehicle is met, the occupied space in the height direction of the vehicle is reduced, the device can be suitable for a large-span fire fighting truck to be provided with a full-hard-pipe and large-drift-diameter boom fire fighting pipeline, and then the on-way resistance of compressed air foam conveying is reduced.

Description

Technical Field

[0001] The utility model relates to a compressed air foam fire fighting vehicle and a system, belonging to the technical field of compressed air foam. Background Art

[0002] Compressed air foam fire truck is a special vehicle specially used for fire fighting, rescue and emergency handling. It uses a compressed air foam fire extinguishing system, which can mix air and foam to form a high-concentration foam spray, effectively extinguish the fire and prevent the fire from spreading. The large-flow compressed air foam fire fighting system is applied to fire trucks. One is to use an independent air supply vehicle for air supply. In actual fire fighting, the independent air supply vehicle and the launch vehicle need to work together. There are certain difficulties in personnel operation and coordination, and the space occupied is large, and the site adaptability is not strong; the other is to arrange the air compressor, water pump and foam pump on the launch vehicle and connect them through belt drive. However, the belt drive has high assembly accuracy requirements for the two pulleys. Once the assembly error exceeds the range, it will cause interference wear between the belt and the pulley at the least, and the belt will be detached from the pulley at the worst. The air compressor loses power and cannot work. In addition, the air compressor and water pump are arranged along the height direction of the vehicle, which makes the fire fighting system occupy a large space in the height dimension of the whole machine, and it cannot be applied to large-span fire trucks equipped with multi-joint boom structures. Utility Model Content

[0003] The purpose of the embodiments of the present disclosure is to overcome the deficiencies in the prior art and to provide a compressed air foam fire fighting truck and system that has low assembly precision requirements and saves space in the vehicle height direction.

[0004] To achieve the above objectives, the embodiments of the present disclosure are implemented by adopting the following technical solutions:

[0005] In a first aspect, an embodiment of the present disclosure provides a compressed air foam fire fighting system, comprising:

[0006] Chassis drive shaft, water pump and air compressor that are transmission-connected to the vehicle engine;

[0007] The transfer case comprises a first input end drivingly connected to the chassis drive shaft, a first output end drivingly connected to the wheel drive shaft, a second output end drivingly connected to the air compressor, and a third output end drivingly connected to the water pump; a first coupling is further provided between the second output end and the air compressor;

[0008] The air compressor and the water pump are arranged along the length direction of the vehicle.

[0009] In some embodiments of the first aspect, a speed increasing box is further included, wherein the second input end of the speed increasing box is transmission-connected to the second output end, and the fourth output end of the speed increasing box is transmission-connected to the first coupling.

[0010] In some embodiments of the first aspect, the second input end of the speed increaser is transmission-connected to the second output end via a telescopic universal joint.

[0011] In some embodiments of the first aspect, a generator is further included, wherein the generator is electrically connected to the electric foam pump; and the fifth output end of the speed increasing box is drivingly connected to the generator.

[0012] In some embodiments of the first aspect, the fifth output end of the speed increaser is drivingly connected to the generator via a second coupling.

[0013] In some embodiments of the first aspect, the axis lines of the first input end coincide with the first output end, the axis lines of the second output end coincide with the third output end, the axis lines of the fourth output end and the fifth output end of the speed increaser coincide with each other, and the three axis lines are coplanar and parallel.

[0014] In some embodiments of the first aspect, the third output end is drivingly connected to the water pump via a telescopic universal joint.

[0015] In some embodiments of the first aspect, the axis lines of the first input end coincide with the axis lines of the first output end, and the first input end and the first output end can be coaxially driven.

[0016] In a second aspect, an embodiment of the present disclosure further provides a compressed air foam fire fighting truck, comprising the compressed air foam fire fighting system described in any embodiment of the first aspect.

[0017] Compared with the prior art, the embodiments of the present disclosure have the following beneficial effects:

[0018] The compressed air foam fire fighting system provided by the embodiment of the present disclosure is characterized in that the air compressor is connected to the transfer case through a first coupling, which can adapt to length and angle errors, reduce assembly accuracy requirements, and make the transmission of the air compressor more stable and reliable; the air compressor and the water pump take power from the vehicle engine to achieve single-vehicle operation; the power distribution through the transmission shaft and the transfer case reduces the volume occupation, meets the requirements of the arrangement of the air compressor to the water pump along the length direction of the vehicle, reduces the occupation of the space in the height direction of the vehicle, and can be applied to large-span fire fighting trucks equipped with full-hard pipes and large-diameter arm fire fighting pipelines, thereby reducing the resistance along the compressed air foam delivery;

[0019] The telescopic universal joint can further reduce the negative impact of the length and angle errors between the air compressor and the transfer case;

[0020] The compressed air foam fire truck provided by the embodiment of the present disclosure has the same technical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 is a schematic structural diagram of a compressed air foam fire fighting vehicle provided by an embodiment of the present disclosure;

[0023] Figure 2 This is a schematic diagram of the structure of the compressed air foam fire truck system provided by the embodiment of the present disclosure.

[0024] In the figure: 1-chassis drive shaft; 2-first input end; 3-first output end; 4-second output end; 5-third output end; 6-air compressor; 7-first coupling; 8-speed increaser; 9-second coupling; 10-generator; 11-water pump; 12-transfer case; 13-chassis; 14-subframe; 15-hydraulic system; 16-electrical system; 17-arm; 18-compressed air foam fire fighting system; 19-fire fighting tank; 20-equipment box; 21-telescopic universal joint. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present disclosure / the present application to clearly and completely describe the technical solutions in the embodiments of the present disclosure / the present application. Obviously, the described embodiments are only part of the embodiments of the present disclosure / the present application, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure / the present application and its application or use. Embodiment 1

[0026] This embodiment provides a compressed air foam fire fighting system 18 to solve the problem in the prior art that the sub-system of the compressed air foam fire fighting system 18 has high assembly precision requirements and occupies space in the height direction of the vehicle.

[0027] refer to Figure 1 and Figure 2 The compressed air foam fire fighting system 18 provided in this embodiment includes a chassis transmission shaft 1, a water pump 11 and an air compressor 6 which are transmission-connected to the vehicle engine.

[0028] Transfer case 12: includes a first input end 2 connected to chassis transmission shaft 1, a first output end 3 connected to wheel transmission shaft, a second output end 4 connected to air compressor 6, and a third output end 5 connected to water pump 11; the second output end 4 and air compressor 6 are also provided with a first coupling 7. Transfer case 12 distributes the power of chassis transmission shaft 1 to air compressor 6 and water pump 11, so that a single vehicle can complete the firefighting operation. The first coupling 7 is used to absorb assembly errors to reduce the assembly requirements of air compressor 6 and transfer case 12; compared with the belt drive, which requires the air compressor 6 and transfer case 12 to be arranged at a certain distance in the vehicle height direction, the transmission using the first coupling 7 has little effect on the vehicle height direction space, so as to facilitate more flexible space arrangement.

[0029] The air compressor 6 to the water pump 11 are arranged along the length direction of the vehicle, mainly occupying the space in the length direction of the vehicle, and the overall position is relatively low. Generally speaking, the space in the length direction of the vehicle is very ample, which can be suitable for large-span fire trucks. Compared with the same level of high-rise fire trucks in the prior art, the compressed air foam fire fighting system 18 provided in this embodiment has a larger horizontal span of the fire truck, and the full hard pipe and large-diameter arm fire fighting pipeline can reduce the resistance along the compressed air foam delivery, and the rated output flow of the compressed air foam system can be larger.

[0030] Optionally, in this embodiment, refer to Figure 1 The transfer case 12 is installed on the chassis 1 of the compressed air foam fire truck. A subframe 14 is also installed on the chassis 1. The subframe 14 is used to carry upper components, such as the air compressor 6 to the water pump 11.

[0031] The working mode of the compressed air foam fire fighting system 18 provided in this embodiment is as follows:

[0032] The first input terminal 2 is connected to the first output terminal 3, and the compressed air foam fire truck is in a driving state;

[0033] The first input terminal 2 and the second output terminal 4 are connected, and the air compressor 6 works alone and is in a purge working mode;

[0034] The first input terminal 2 and the third output terminal 5 are connected, and the water pump 11 works alone in a pure water fire extinguishing or cleaning mode;

[0035] The first input terminal 2 is connected to the second output terminal 4 and the third output terminal 5 at the same time, and the foam pump is started, which is in the compressed air foam fire extinguishing mode. Embodiment 2

[0036] refer to Figure 2 This embodiment provides a compressed air foam fire fighting system, which is improved on the basis of the first embodiment. For details not provided, please refer to the first embodiment.

[0037] Optionally, in this embodiment, a speed increaser 8 is also included, which has at least one second input end and two fourth and fifth output ends. The second input end of the speed increaser 8 is transmission connected to the second output end 4, and the fourth output end of the speed increaser 8 is transmission connected to the first coupling 7.

[0038] The second input end of the speed increaser 8 is transmission-connected to the second output end 4 via a telescopic universal joint 21. Compared with the first coupling 7 in the first embodiment, the common use of the first coupling 7 and the telescopic universal joint 21 in this embodiment can further absorb assembly errors.

[0039] Optionally, in this embodiment, the compressed air foam fire fighting system also includes a generator 10, and the foam pump is an electric foam pump. The generator 10 is used to be electrically connected to the electric foam pump to provide power to the electric foam pump; the fifth output end of the speed increaser 8 is transmission connected to the generator 10; preferably, the fifth output end of the speed increaser 8 is transmission connected to the generator 10 through a second coupling 9, and the second coupling 9 also plays a role in absorbing assembly errors.

[0040] Embodiment 1 mentions that the air compressor 6 to the water pump 11 are arranged along the length direction of the vehicle, mainly occupying the space in the length direction of the vehicle. Optionally, in this embodiment, the axis lines of the first input terminal 2 coincide with the first output terminal 3, the axis lines of the second output terminal 4 coincide with the third output terminal 5, and the axis lines of the fourth output terminal and the fifth output terminal of the speed increaser 8 coincide with each other. The three axis lines are coplanar and parallel. The compressed air foam fire fighting system 18 as a whole extends along the length direction of the compressed air foam fire fighting truck, and there is ample space in the height direction of the vehicle.

[0041] Optionally, in this embodiment, the third output end 5 is transmission-connected to the water pump 11 via a telescopic universal joint 21 to reduce the influence of assembly errors.

[0042] Optionally, in this embodiment, the axis lines of the first input terminal 2 and the first output terminal 3 coincide, and the first input terminal 2 and the first output terminal 3 can be coaxially driven. When the first input terminal 2 and the first output terminal 3 are coaxially driven, the first input terminal 2 directly outputs to the first output terminal 3, and the axial force loss is small.

[0043] Optionally, in this embodiment, there is no clutch control on and off inside the speed increasing box 8. Optionally, in this embodiment, the foam pump is used to deliver the foam concentrate, including a screw foam pump, a gear foam pump, a plunger foam pump, and is usually driven by a servo motor or a hydraulic motor.

[0044] Optionally, in this embodiment, a speed increasing mechanism and a clutch mechanism are provided inside the transfer case 12 . Embodiment 3

[0045] This embodiment provides a compressed air foam fire fighting vehicle, including the compressed air foam fire fighting system 18 provided in either the first embodiment or the second embodiment. In view of the same principle, it will not be described in detail here.

[0046] refer to Figure 1 Optionally, in this embodiment, the compressed air foam fire truck includes a chassis 13 and a subframe 14, and also includes a hydraulic system 15 and an electrical system 16 for controlling vehicle movement and firefighting operations, an equipment box 20 for loading firefighting equipment, and a boom 17, wherein the boom 17 is provided with pipelines for spraying foam and compressed air; optionally, in some embodiments, the boom 17 includes a telescopic boom, a folding boom and a telescopic and folding combined boom, and a working platform and a water cannon are arranged at the boom head to facilitate high-altitude rescue and firefighting; it also includes a fire tank 19 for loading fire extinguishing agent; a large-diameter fire water pipe is installed on the multi-joint folding boom for long-distance transportation of fire extinguishing agent; the compressed air foam fire fighting system 18 pressurizes and mixes the fire extinguishing agent.

[0047] In the past, large-flow (rated flow ≥ 170L / s) compressed air foam systems were used in fire trucks, and independent air supply vehicles were used for air supply. Two vehicles were required to work together for actual firefighting, which made it difficult for personnel to operate and cooperate. In addition, the space occupied was large and the site adaptability was not strong. In the compressed air foam fire truck provided in this embodiment, the air compressor 6, water pump 11 and foam pump are all powered by the vehicle engine of the chassis. The whole vehicle has four firefighting operation modes: pure water firefighting, compressed air foam firefighting, negative pressure foam firefighting, and heavy powder firefighting. By optimizing the transmission system design, the layout of the air compressor 6 and the water pump 11 is simpler and the transmission is more reliable.

[0048] Optionally, in this embodiment, the transfer case 12 is arranged in the middle of the chassis main transmission shaft to obtain engine power.

[0049] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0050] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "provided at", "provided with", "located", "installed", "set", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. "Hinged" includes "rotational connection".

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A compressed air foam fire fighting system, It is characterized in that include, A chassis transmission shaft (1), a water pump (11) and an air compressor (6) drivingly connected to the vehicle engine; The transfer case (12) comprises a first input end (2) drivingly connected to the chassis drive shaft (1), a first output end (3) drivingly connected to the wheel drive shaft, a second output end (4) drivingly connected to the air compressor (6), and a third output end (5) drivingly connected to the water pump (11); a first coupling (7) is further provided between the second output end (4) and the air compressor (6); The air compressor (6) and the water pump (11) are arranged along the length direction of the vehicle.

2. The compressed air foam fire fighting system according to claim 1, It is characterized in that It also comprises a speed increasing box (8), wherein the second input end of the speed increasing box (8) is transmission-connected to the second output end (4), and the fourth output end of the speed increasing box (8) is transmission-connected to the first coupling (7).

3. The compressed air foam fire fighting system according to claim 2, It is characterized in that The second input end of the speed increasing box (8) is transmission-connected to the second output end (4) via a telescopic universal joint (21).

4. The compressed air foam fire fighting system according to claim 2, It is characterized in that It also comprises a generator (10), the generator (10) being used to be electrically connected to the electric foam pump; the fifth output end of the speed increasing box (8) is drivingly connected to the generator (10).

5. The compressed air foam fire fighting system according to claim 4, It is characterized in that The fifth output end of the speed increasing box (8) is transmission-connected to the generator (10) via a second coupling (9).

6. The compressed air foam fire fighting system according to claim 4, It is characterized in that The axis center lines of the first input end (2) and the first output end (3) coincide with each other, the axis center lines of the second output end (4) and the third output end (5) coincide with each other, and the axis center lines of the fourth output end and the fifth output end of the speed increase box (8) coincide with each other, and the three axis center lines are coplanar and parallel.

7. The compressed air foam fire fighting system according to claim 1, It is characterized in that The third output end (5) is drivingly connected to the water pump (11) via a telescopic universal joint (21).

8. The compressed air foam fire fighting system according to claim 1, It is characterized in that The axis center lines of the first input end (2) and the first output end (3) coincide with each other, and the first input end (2) and the first output end (3) can be coaxially driven.

9. A compressed air foam fire truck, It is characterized in that A compressed air foam fire fighting system (18) comprising the compressed air foam fire fighting system (18) as claimed in any one of claims 1 to 8.

Images