Composite boom and fire fighting truck

Abstract

The invention discloses a composite cantilever crane and a fire fighting truck in the field of fire fighting, and aims to solve the problems of heavy weight and high structural strength requirements of a fire fighting truck cantilever crane in the prior art, the composite cantilever crane comprises a cantilever crane structure, an oil cylinder mechanism and a water pipe, the oil cylinder mechanism comprises a cylinder barrel and a cylinder rod, and the cylinder rod is of a hollow structure internally provided with a through hole; the through hole is formed in the cylinder rod of the oil cylinder mechanism, the first water pipe is arranged in the through hole, fire fighting water flows out of the end of the water pipe and enters the through hole, then water is sprayed from the fire fighting water monitor at the end of the cylinder rod to extinguish fire, the cylinder rod telescopically moves in the cylinder barrel, and the fire fighting water monitor is arranged at the end of the cylinder rod. According to the fire water monitor lifting device, an existing telescopic water pipe and an existing telescopic arm frame are combined together, the oil cylinder mechanism has the functions of lifting the fire water monitor and supplying water to the fire water monitor, and the structure is light in self weight.

Description

Technical Field

[0001] The invention relates to the field of firefighting, and in particular to a composite boom and a fire truck. Background Art

[0002] In the prior art, in order to realize the telescopic arm of the fire truck to extend and retract a certain distance and realize the fire cannon to spray fire-fighting liquid deep inside the factory to extinguish the fire, the fire truck is designed with an independent telescopic arm, the hydraulic system is designed with a telescopic oil cylinder, and the fire pipeline is designed with a telescopic water pipe. The telescopic oil cylinder is installed inside the telescopic arm. The telescopic water pipe is fixed to the side of the telescopic arm by a bracket. The telescopic movement of the arm drives the telescopic movement of the telescopic water pipe, thereby realizing the movement of the telescopic water pipe, providing continuous fire-fighting liquid for the fire cannon fixed on the arm head to spray and extinguish the fire. The structure itself is heavy and complex, and the strength requirements of the arm are high. Summary of the invention

[0003] The purpose of the present invention is to provide a composite boom and a fire truck, wherein the cylinder rod is a hollow structure with a through hole to achieve water flow in the through hole, a water pipe is arranged inside, and the cylinder rod moves in the cylinder barrel to achieve the function of retracting the water pipe.

[0004] In order to solve the above technical problems, the following technical solutions are adopted: In a first aspect, the present invention provides a composite boom, comprising a boom structure and a cylinder mechanism, wherein the cylinder mechanism is installed on the boom structure, the cylinder mechanism comprising a cylinder barrel and a cylinder rod, the cylinder rod is arranged in the cylinder barrel, and the cylinder rod is controlled to extend and retract in the cylinder barrel by a hydraulic system, the cylinder rod extends from one end of the cylinder barrel, and a cylinder barrel connecting hole is provided at the other end of the cylinder barrel, the cylinder rod is a tubular structure with a through hole inside and openings at both ends, a first water pipe is provided in the through hole, one end of the first water pipe is aligned with the connecting hole of the cylinder barrel, and a first flange is provided, the first flange is connected to a second water pipe, and the second water pipe is connected to a delivery water pipe, and a fire water monitor is installed on the end of the cylinder rod extending from the cylinder barrel.

[0005] Optionally, the cylinder is connected to the arm structure via an arm connecting seat, an arm connection hinge is provided on the arm connecting seat, and the arm connecting seat is connected to the arm structure via the arm connection hinge and a connecting piece.

[0006] Optionally, a water pipe hole for passing a second water pipe is provided on the side of the arm connecting seat, a second flange is provided at the end of the second water pipe away from the first flange, the second water pipe is connected to the delivery water pipe through the second flange, and the delivery water pipe is connected to the water tank of the fire truck.

[0007] Optionally, a rear end reinforcement mechanism is provided on one end of the cylinder barrel close to the arm support connecting seat, and the rear end reinforcement mechanism is a cylindrical structure with openings at both ends. One end of the rear end reinforcement mechanism is connected to the arm support connecting seat, and the rear end reinforcement mechanism is used to strengthen the support of the cylinder barrel and the cylinder rod.

[0008] Optionally, a cross section of the cylinder rod is evenly provided with a plurality of small holes, and the small holes extend to both ends.

[0009] Optionally, a first oil port is provided on the side wall of the cylinder at one end close to the arm structure, and a second oil port is provided on the side wall at one end away from the arm structure, and the first oil port and the second oil port are connected to the oil circuit of the hydraulic system.

[0010] Optionally, a V-shaped seal is provided between the cylinder barrel and the cylinder rod.

[0011] Optionally, the cylinder mechanism and the arm structure are both made of aluminum alloy.

[0012] Optionally, a plurality of the cylinder mechanisms are provided, and the diameters of the plurality of cylinder mechanisms are different, and multi-stage telescoping is achieved by sleeve-mounting a cylinder mechanism with a large diameter on a cylinder mechanism with a small diameter.

[0013] In a second aspect, the present invention provides a fire truck, comprising the composite boom as described in any one of the first aspects.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. A through hole is provided inside the cylinder rod of the oil cylinder mechanism provided in the present invention, and a first water pipe is provided in the through hole. Fire water flows out from the end of the water pipe into the through hole, and then water is sprayed from the fire water monitor at the end of the cylinder rod to extinguish the fire. The cylinder rod is telescopically moved in the cylinder barrel to realize the lifting of the fire water monitor. The present invention combines the existing telescopic water pipe and telescopic arm together. The oil cylinder mechanism has the function of lifting the fire water monitor and the function of supplying water to the fire water monitor, and the structure itself is light in weight.

[0015] 2. The seal between the cylinder rod and the cylinder barrel of the present invention is a V-shaped seal. When water flows inside the cylinder rod, the fire water squeezes the inner wall of the cylinder barrel, and the cylinder rod squeezes the cylinder barrel. There is a gap at the front end of the V-shaped seal, which can show that when the cylinder rod compresses the cylinder barrel, the V-shaped seal can have spatial deformation and rebound, thereby avoiding the influence of squeezing and deformation of the seal on subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 1 is a three-view structural schematic diagram of a composite boom in an embodiment of the present invention; Figure 2 Schematic diagram of the structure of the oil cylinder mechanism in an embodiment of the present invention; Figure 32 is a schematic diagram of the structure of a V-shaped seal in an embodiment of the present invention; Figure 4 Schematic diagram of the distribution of small holes on the oil cylinder in an embodiment of the present invention.

[0017] Description of reference numerals: 1. Cylinder barrel; 2. Cylinder rod; 3. Through hole; 4. First water pipe; 5. Rear end reinforcement mechanism; 6. First flange; 7. Water pipe hole; 8. Boom connection seat; 9. Boom connection hinge; 10. First oil port; 11. Second oil port; 12. V-shaped seal; 13. Small hole; 14. Second flange; 15. Second water pipe. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, 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 invention and its application or use. Example 1

[0019] like Figure 1 , Figure 2 As shown, this embodiment provides a composite boom, including a boom structure and a cylinder mechanism, wherein the cylinder mechanism is installed on the boom structure, and the cylinder mechanism includes a cylinder barrel 1 and a cylinder rod 2, wherein the cylinder rod 2 is arranged in the cylinder barrel 1, and the cylinder rod 2 is controlled to extend and retract in the cylinder barrel 1 by a hydraulic system, and the cylinder rod 2 extends from the other end of the cylinder barrel 1, and a connecting hole is opened at the other end of the cylinder barrel 1, and the cylinder rod 2 is a cylindrical structure with a through hole 3 provided inside and openings at both ends, and a first water pipe 4 is provided in the through hole 3, one end of the first water pipe 4 is aligned with the connecting hole of the cylinder barrel 1, and a first flange 6 is provided, and the other end of the first water pipe 4 is arranged in the through hole 3, and the first flange 6 is connected to a second water pipe 15, and the second water pipe 15 is connected to a delivery water pipe, and a fire monitor is installed on the end of the cylinder rod 2 extending from the cylinder barrel 3.

[0020] The firefighting water flows from the delivery water pipe into the second water pipe 15, then into the first water pipe 4, and then into the through hole 3 of the cylinder rod 2, and then is sprayed out by the firefighting water monitor at the end. When dealing with fires at different heights, the cylinder rod 2 is extended and retracted in the cylinder barrel 1 to achieve the lifting and use of the firefighting water monitor. During the extension and retraction process of the cylinder rod 2, the first water pipe 4 is set in the through hole 3, and the other end of the first water pipe 4 is connected to the second water pipe 15, and the second water pipe 15 is connected to the delivery water pipe to form a firefighting pipeline to deliver firefighting water. Example 2

[0021] like Figure 1-Figure 4As shown, this embodiment provides a composite boom based on Embodiment 1, wherein a boom connecting seat 8 is installed at one end of the cylinder 1, the cylinder 1 is connected to the boom structure through the boom connecting seat 8, an boom connection hinge 9 is provided on the boom connecting seat 8, the boom connecting seat 8 is connected to the boom structure through the boom connection hinge 9 and a connecting piece, a water pipe hole 7 for passing a second water pipe 15 is provided on the side of the boom connecting seat 8, a second flange 14 is provided at one end of the second water pipe 15 away from the first flange 6, the second water pipe 15 is connected to the delivery water pipe through the second flange 14, and the delivery water pipe is connected to the water tank of the fire truck.

[0022] A rear end reinforcement mechanism 5 is provided on one end of the cylinder 1 close to the arm support connecting seat 8. The rear end reinforcement mechanism 5 is a cylindrical structure with openings at both ends and is sleeved on the outer wall of the cylinder 1. One end of the rear end reinforcement mechanism 5 is connected to the arm support connecting seat 8, and the support of the cylinder 1 and the internal cylinder rod 2 is strengthened by the rear end reinforcement mechanism 5.

[0023] The materials of the first water pipe 4, the cylinder mechanism and the arm structure can all be aluminum alloy, wherein the arm structure can also be made of carbon steel. The arm structure is installed on the top of the water tank and is used to install the cylinder mechanism. The arm structure only bears the fire water passing through the cylinder mechanism and the cylinder rod 2. The cylinder mechanism is made of aluminum alloy and is light in weight. The strength and rigidity of the arm structure do not need to be too large to meet the use requirements.

[0024] The cross section of the cylinder rod 2 is provided with a plurality of small holes 13 extending to both ends, so as to reduce the weight of the cylinder rod 2 while ensuring the strength in use.

[0025] The seal between the cylinder barrel 1 and the cylinder rod 2 is a V-shaped seal 12. When fire water passes through the through hole 3 of the cylinder rod 2, the fire water squeezes the cylinder rod 2, and the cylinder rod 2 pressurizes the cylinder barrel 1. During the squeezing process, the open end of the V-shaped seal 12 can withstand its deformation. After the squeezing disappears, there is enough space to restore its original shape, which avoids the previous O-ring, which has no space to restore its shape after squeezing, affecting subsequent use. At the same time, the V-shaped seal 12 reduces the resistance of the cylinder mechanism to telescopic movement. The traditional O-ring sealing groove design standard is designed for high pressure of hydraulic systems. The rubber ring is too compressed, resulting in a large resistance to the expansion and contraction of the cylinder. The pressure generated by the compression deformation is superimposed on the force generated by the expansion and contraction movement, which will cause deformation of the internal cylinder. The use of the V-shaped seal 12 can avoid the above-mentioned problems of the O-ring, reduce the friction resistance of the cylinder mechanism during expansion and contraction, and make the movement smoother.

[0026] A first oil port 10 is provided at one end of the outer wall of the cylinder barrel 1 close to the arm connecting seat 8, and a second oil port 11 is provided at the other end. The first oil port 10 and the second oil port 11 are connected to the oil circuit of the hydraulic system. When the hydraulic oil enters from the first oil port 10, the cylinder rod 2 extends forward in the cylinder barrel 1 and is then discharged from the second oil port 11. When the hydraulic oil enters from the second oil port 11, the cylinder rod 2 retracts in the cylinder barrel 1 and is then discharged from the first oil port 10.

[0027] The composite boom can include multiple cylinder mechanisms for simultaneous use. The diameters of the multiple cylinder mechanisms are different. The large-diameter cylinder mechanism is sleeved on the small-diameter cylinder mechanism to achieve multi-stage telescopic extension. The through hole in the large-diameter cylinder rod 2 is sleeved on the small-diameter cylinder barrel 1. When the small-diameter cylinder rod 2 is extended to the longest, the large-diameter cylinder rod 2 continues to extend forward. Multiple cylinder mechanisms are set up in this way, and a fire water monitor is installed at the end of the outermost cylinder rod 2 to meet the height requirements.

[0028] The present invention integrates the original telescopic boom, telescopic water pipe and telescopic oil cylinder together, and uses a hollow telescopic oil cylinder to realize the functions of water flow and telescopic. At the same time, the telescopic boom is not required, and the bending effect of the telescopic water pipe at the node position of the telescopic boom is avoided. The fire water directly reaches the fire water monitor through the cylinder rod 2, which greatly reduces the overall weight of the boom and is more stable during use. During use, the structure of the present application is compact and can be extended into a small space to extinguish a fire. Example 3

[0029] This embodiment provides a fire truck, including the composite arm described in Embodiment 1 or Embodiment 2, wherein the composite arm is installed on the top of the fire truck body, the second water pipe 15 is connected to the delivery water pipe, the delivery water pipe is connected to the water tank of the fire truck body, and a water pump is provided on the fire truck. The water in the water tank is pumped into the water tank through the water pump, and the fire water is pressurized to the rated working pressure, and the fire water is then sprayed out from the fire water cannon at the other end of the cylinder body.

[0030] The composite boom has a single overall structure and is light in weight. It can be extended into a narrow space to extinguish fires. Multiple cylinder mechanisms can be set according to height requirements. The large-diameter cylinder mechanism is set on the small-diameter cylinder mechanism to achieve multi-stage telescopic extension. The composite boom has a light overall weight and avoids the fire truck from rolling over when the water in the water tank is exhausted, greatly improving the overall vehicle operation safety.

[0031] 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 scope of protection of the present invention.

Claims

1. A composite boom, comprising a boom structure and a cylinder mechanism, wherein the cylinder mechanism is mounted on the boom structure, and characterized in that: The cylinder mechanism includes a cylinder barrel and a cylinder rod, wherein the cylinder rod is arranged in the cylinder barrel, and the cylinder rod is controlled to extend and retract in the cylinder barrel by a hydraulic system, and the cylinder rod extends from one end of the cylinder barrel, and a cylinder barrel connecting hole is provided at the other end of the cylinder barrel. The cylinder rod is a cylindrical structure with a through hole inside and openings at both ends, and a first water pipe is provided in the through hole, and one end of the first water pipe is aligned with the connecting hole of the cylinder barrel and is provided with a first flange, and the first flange is connected to a second water pipe, and the second water pipe is connected to a delivery water pipe, and a fire water monitor is installed on the end of the cylinder rod extending from the cylinder barrel.

2. The composite boom according to claim 1, characterized in that: The cylinder is connected to the arm structure through an arm connecting seat, an arm connecting hinge is provided on the arm connecting seat, and the arm connecting seat is connected to the arm structure through the arm connecting hinge and a connecting piece.

3. The composite boom according to claim 1, characterized in that: A water pipe hole for passing a second water pipe is provided on the side of the arm connecting seat, a second flange is provided at one end of the second water pipe away from the first flange, the second water pipe is connected to the delivery water pipe through the second flange, and the delivery water pipe is connected to the water tank of the fire truck.

4. The composite boom according to claim 1, characterized in that: A rear end reinforcement mechanism is provided on one end of the cylinder barrel close to the arm support connecting seat. The rear end reinforcement mechanism is a cylindrical structure with openings at both ends. One end of the rear end reinforcement mechanism is connected to the arm support connecting seat. The rear end reinforcement mechanism is used to strengthen the support of the cylinder barrel and the cylinder rod.

5. The composite boom according to claim 1, characterized in that: The cross section of the cylinder rod is evenly provided with a plurality of small holes, and the small holes extend to both ends.

6. The composite boom according to claim 1, characterized in that: A first oil port is provided on the side wall of the cylinder barrel at one end close to the arm structure, and a second oil port is provided on the side wall at one end away from the arm structure. The first oil port and the second oil port are connected to the oil circuit of the hydraulic system.

7. The composite boom according to claim 1, characterized in that: A V-shaped sealing member is provided between the cylinder barrel and the cylinder rod.

8. The composite boom according to claim 1, characterized in that: The oil cylinder mechanism and the arm structure are both made of aluminum alloy.

9. The composite boom according to claim 1, characterized in that: The oil cylinder mechanisms are provided in plurality, and the diameters of the plurality of oil cylinder mechanisms are different. The oil cylinder mechanism with a large diameter is sleeved on the oil cylinder mechanism with a small diameter to realize multi-stage telescopic extension.

10. A fire truck, characterized in that: A composite boom comprising the composite boom described in any one of claims 1 to 9.

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