Central revolving body and fire fighting truck

Abstract

A central revolving body and a fire fighting truck relate to the technical field of engineering vehicles. The central rotary body comprises an inner pipeline and an outer pipeline. The outer pipeline comprises an outer input pipe, an outer connecting pipe set and an outer output pipe which are sequentially connected. The outer input pipe is rotationally connected with one end of the outer connecting pipe set, and the other end of the outer connecting pipe set is fixedly connected with the outer output pipe. The inner pipeline comprises an inner input pipe, an inner connecting pipe and an inner output pipe which are sequentially connected. And the inner input pipe is fixedly connected with the outer input pipe. And the inner input pipe is rotatably connected with the inner connecting pipe. And the inner output pipe is fixedly connected with the outer output pipe. The inlet direction of the outer input pipe, the axis of the outer connecting pipe set and the outlet direction of the outer output pipe are collinear. The fire fighting truck comprises the central revolving body. Elbows of a water passing pipeline can be reduced, and the pressure loss of the water pipeline is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering vehicles, in particular to a central rotary body and a fire truck. Background Art

[0002] As essential equipment for modern urban firefighting, aerial fire trucks are gradually becoming larger and taller. These trucks feature a fixed lower section and a continuous upper section that rotates 360 degrees around a central rotation center. During this relative rotation, the hydraulic, electrical, and water systems between the upper and lower sections must remain unobstructed. Existing upper and lower sections are connected by a central rotating body, which connects the hydraulic, electrical, and water systems of the lower section with those of the upper section, ensuring that the aerial fire truck can complete control and operational requirements such as boom movement and water pumping.

[0003] The inventors have found through research that the inlet and outlet connections of the existing water pipes of the central rotating body have elbows, resulting in excessive water pressure loss. Utility Model Content

[0004] The purpose of the utility model is to provide a central rotating body and a fire truck, which can reduce the elbows of the water pipe and reduce the pressure loss of the water pipe.

[0005] The embodiment of the present utility model is achieved as follows:

[0006] In the first aspect, the utility model provides a central rotating body, comprising an inner pipeline and an outer pipeline, the inner pipeline is located inside the outer pipeline, the outer pipeline comprises an outer input pipe, an outer connecting pipe group and an outer output pipe connected in sequence, the outer input pipe and one end of the outer connecting pipe group are rotatably connected, and the other end of the outer connecting pipe group is fixedly connected to the outer output pipe, the inner pipeline comprises an inner input pipe, an inner connecting pipe and an inner output pipe connected in sequence, the inner input pipe extends into the outer input pipe near one end of the inner connecting pipe, the inner input pipe is fixedly connected to the outer input pipe, the inner input pipe and the inner connecting pipe are rotatably connected, the inner output pipe extends out of the outer output pipe at one end away from the inner connecting pipe, the inner output pipe is fixedly connected to the outer output pipe, and the inlet direction of the outer input pipe, the axis of the outer connecting pipe group and the outlet direction of the outer output pipe are collinear.

[0007] In an optional embodiment, an angle is formed between the inlet direction of the inner input pipe and the inlet direction of the outer input pipe, and an angle is formed between the outlet direction of the inner output pipe and the outlet direction of the outer output pipe.

[0008] In an optional embodiment, the external connecting pipe group includes an external connecting pipe and a rotating inner ring, the external input pipe and one end of the external connecting pipe are rotatably connected, the other end of the external connecting pipe, the rotating inner ring and the external output pipe are fixedly connected in sequence, and the rotating inner ring is used to drive the internal output pipe and the external connecting pipe to rotate.

[0009] In an optional embodiment, a fixed outer ring is further sleeved on the outer side of the rotating inner ring, the rotating inner ring and the fixed outer ring are capable of rotating relative to each other, and a first rotating seal is provided between the rotating inner ring and the fixed outer ring.

[0010] In an optional embodiment, an oil and gas pipeline is opened on the fixed outer ring toward the rotating inner ring.

[0011] In an optional embodiment, a groove is provided at one end of the external connecting pipe close to the external input pipe, a rotatable clamping ring is provided in the groove, and the clamping ring is connected to the external input pipe via a flange.

[0012] In an optional embodiment, a conductive slip ring is further included, which includes a rotating member and a fixed member rotatably connected to the rotating member, the rotating member is fixedly connected to the rotating inner ring, and the fixed member is used for an external power supply.

[0013] In an optional embodiment, a first sealing member is provided between the outer output pipe and the rotating inner ring, and a second sealing member is provided between the rotating inner ring and the outer connecting pipe.

[0014] In an optional embodiment, a second rotary seal is provided between the external input pipe and the external connecting pipe.

[0015] In a second aspect, the present invention provides a fire truck comprising a central rotating body as described in any one of the aforementioned embodiments.

[0016] The beneficial effects of the embodiments of the present utility model are:

[0017] The central rotating body of the present invention includes an inner pipeline and an outer pipeline. The inner pipeline is located inside the outer pipeline. The outer pipeline includes an outer input pipe, an outer connecting pipe group, and an outer output pipe connected in sequence. The outer input pipe is rotatably connected to one end of the outer connecting pipe group, and the other end of the outer connecting pipe group is fixedly connected to the outer output pipe. The inner pipeline includes an inner input pipe, an inner connecting pipe, and an inner output pipe connected in sequence. The end of the inner input pipe close to the inner connecting pipe extends into the outer input pipe. The inner input pipe is fixedly connected to the outer input pipe. The inner input pipe and the inner connecting pipe are rotatably connected. The end of the inner output pipe away from the inner connecting pipe extends out of the outer output pipe. The inner output pipe is fixedly connected to the outer output pipe. The inlet direction of the outer input pipe, the axis of the outer connecting pipe group, and the outlet direction of the outer output pipe are collinear.

[0018] The central rotating body of the utility model makes the inlet direction of the external input pipe and the outlet direction of the external output pipe collinear, and reduces the setting of the external input pipe and the external output pipe to reduce the bend, thereby preventing the water flow from flowing through the bend to slow down the impact and reducing the water pressure loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of the central rotating body provided in the first embodiment of the present utility model.

[0021] Icons: 100-central rotating body; 10-inner pipeline; 11-inner input pipe; 12-inner connecting pipe; 13-inner output pipe; 20-outer pipeline; 21-outer input pipe; 220-outer connecting pipe group; 22-outer connecting pipe; 221-second rotating seal; 222-clamping ring; 223-second seal; 23-rotating inner ring; 231-first rotating seal; 24-fixed outer ring; 241-oil and gas pipeline; 25-outer output pipe; 251-first seal; 26-conductive slip ring. DETAILED DESCRIPTION

[0022] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and to simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal" and "vertical" do not necessarily mean that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0027] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0028] Please refer to Figure 1 This embodiment provides a central rotating body 100 of a fire truck, which is used to be installed on the rotating platform of the fire truck, and includes an inner pipeline 10 and an outer pipeline 20. The inner pipeline 10 is located inside the outer pipeline 20. The outer pipeline 20 includes an outer input pipe 21, an outer connecting pipe group 220, and an outer output pipe 25 connected in sequence. One end of the outer input pipe 21 is rotatably connected to the outer connecting pipe group 220, and the other end of the outer connecting pipe group 220 is fixedly connected to the outer output pipe 25. The inner pipeline 10 includes an inner input pipe 11, an inner connecting pipe 12, and an inner output pipe 13 connected in sequence. The end of the inner input pipe 11 close to the inner connecting pipe 12 extends into the outer input pipe 21. The inner input pipe 11 is fixedly connected to the outer input pipe 21. The inner input pipe 11 and the inner connecting pipe 12 are rotatably connected. The end of the inner output pipe 13 away from the inner connecting pipe 12 extends out of the outer output pipe 25. The inner output pipe 13 is fixedly connected to the outer output pipe 25. The inlet direction of the external input pipe 21 , the axis of the external connecting pipe group 220 , and the outlet direction of the external output pipe 25 are collinear.

[0029] In this embodiment, the central rotating body 100 is used to realize the transportation of multiple fluids between two rotating devices. Specifically, the fire truck in this embodiment includes a fixed tank body and a rotating nozzle, and the tank body and the nozzle are connected by a turntable. The central rotating body 100 of this embodiment is located in the turntable. The fixed part of the central rotating body 100 includes an internal input pipe 11 and an external input pipe 21, which are connected to the tank body fixed at the bottom of the fire truck. The rotating part of the central rotating body 100 includes an internal connecting pipe 12, an internal output pipe 13, an external connecting pipe group 220 and an external output pipe 25. The external connecting pipe group 220 is fixedly connected to the turntable of the fire truck so that the rotating part of the central rotating body 100 and the nozzle above the fire truck rotate synchronously.

[0030] Furthermore, the inner pipe 10 is used to introduce fire extinguishing agent. The inner input pipe 11 is connected to the fire extinguishing agent tank. The fire extinguishing agent enters the inner pipe from the inner input pipe 11 and is output from the inner output pipe 13 to the rotatable nozzle above the fire truck for spraying. The outer pipe 20 is used to introduce water. The outer input pipe 21 is connected to the water tank of the fire truck. Water enters the outer pipe from the outer input pipe 21 and is output from the outer output pipe 25 to the rotatable nozzle above the fire truck for spraying. It will be understood that the outer pipe 20 is configured as a straight pipe to prevent the water from flowing through bends, mitigate the impact, and reduce water pressure loss.

[0031] Specifically, in this embodiment, the outer input pipe 21 and the inner input pipe 11 are integrally formed, and the outer output pipe 25 and the inner input pipe 11 are integrally formed.

[0032] It is understood that the inner input tube 11 extends from the side wall of the outer input tube 21 into the interior of the outer pipeline 20 and then connects to the inner connecting tube 12. The inner connecting tube 12 is connected to one end of the inner output tube 13. The other end of the inner output tube 13 extends from the side wall of the outer output tube 25 into the outer pipeline 20.

[0033] Furthermore, to facilitate the connection between the central rotating body 100 and the tank and reduce piping material consumption, an angle is formed between the inlet direction of the inner input pipe 11 and the inlet direction of the outer input pipe 21. Similarly, to facilitate the connection between the central rotating body 100 and the nozzle, an angle is formed between the outlet direction of the inner output pipe 13 and the outlet direction of the outer output pipe 25.

[0034] Specifically, the angle between the inlet direction of the inner input pipe 11 and the inlet direction of the outer input pipe 21 is less than or equal to 90 degrees, and the angle between the outlet direction of the inner output pipe 13 and the outlet direction of the outer output pipe 25 is less than or equal to 90 degrees. In this embodiment, the angle between the inlet direction of the inner input pipe 11 and the inlet direction of the outer input pipe 21 is an acute angle. The angle between the outlet direction of the inner output pipe 13 and the outlet direction of the outer output pipe 25 is a right angle. In other embodiments, the angle between the inlet direction of the inner input pipe 11 and the inlet direction of the outer input pipe 21 can be a right angle, and the angle between the outlet direction of the inner output pipe 13 and the outlet direction of the outer output pipe 25 can be an acute angle, but this is not limited in the present invention.

[0035] In this embodiment, the external connecting tube assembly 220 includes an external connecting tube 22 and a rotating inner ring 23. The external input tube 21 is rotatably connected to one end of the external connecting tube 22. The other end of the external connecting tube 22, the rotating inner ring 23, and the external output tube 25 are fixedly connected in sequence. The rotating inner ring 23 is used to drive the internal output tube 13 and the external connecting tube 22 to rotate.

[0036] Specifically, the rotating inner ring 23 serves as a rotary valve body, driving the rotation of the inner output tube 13 and the outer connecting tube 22. It will be appreciated that the inner wall of the rotating inner ring 23 forms the inner wall of the outer pipeline 20. When connected to an external power source, the rotating inner ring 23 rotates, driving the outer output tube 25 and the outer connecting tube 22 to rotate. The outer output tube 25 further drives the inner output tube 13 and the inner connecting tube 12 to rotate, thereby achieving relative rotation between the rotating and fixed parts of the central rotating body 100.

[0037] In this embodiment, the external input pipe 21 , the external connecting pipe 22 , the rotating inner ring 23 and the external output pipe 25 are coaxially arranged.

[0038] Furthermore, a stationary outer ring 24 is sleeved around the outer side of the rotating inner ring 23. The rotating inner ring 23 and the stationary outer ring 24 are capable of relative rotation. A first rotating seal 231 is provided between the rotating inner ring 23 and the stationary outer ring 24. It will be appreciated that the stationary outer ring 24 is fixedly connected to the fire truck's turntable, thereby fixing the rotation axis of the central rotating body 100 and enabling the central rotating body 100 to rotate synchronously with the fire truck's nozzles.

[0039] Specifically, the stationary outer ring 24 is provided with an oil and gas pipeline 241 directed toward the rotating inner ring 23. This allows oil or gas to flow into the gap between the stationary outer ring 24 and the rotating inner ring 23, thereby reducing friction. Multiple first rotating seals 231 are sealing rings that fit over the rotating inner ring 23. These seals are spaced along the axis of the rotating inner ring 23.

[0040] In this embodiment, a groove is provided at one end of the external connecting tube 22 near the external input tube 21. A rotatable snap ring 222 is provided in the groove. The snap ring 222 is connected to the external input tube 21 via a flange. It will be understood that the groove is provided on the external connecting tube 22 to limit the axial movement of the snap ring 222 relative to the external connecting tube 22. When the external connecting tube 22 rotates, the snap ring 222 is fixedly connected to the external input tube 21, thereby rotating relative to the external connecting tube 22. The snap ring 222 is provided to achieve axial positioning of the external connecting tube 22 and the external input tube 21, ensuring that the external connecting tube 22 and the external input tube 21 are arranged coaxially.

[0041] Furthermore, the central rotating body 100 also includes a conductive slip ring 26. The conductive slip ring 26 includes a rotating member (not shown) and a fixed member (not shown) rotatably connected to the rotating member. The rotating member is fixedly connected to the rotating inner ring 23. The fixed member is used to connect to an external power source. It will be understood that since the rotating inner ring 23 is rotating, the conductive slip ring 26 is required to electrically connect the external power source to the rotating inner ring 23. The conductive slip ring 26 can achieve electrical connection between the fixed and rotating parts.

[0042] In this embodiment, a first seal 251 is provided between the external output pipe 25 and the rotating inner ring 23, and a second seal 223 is provided between the rotating inner ring 23 and the external connecting pipe 22. Furthermore, a second rotary seal 221 is provided between the external input pipe 21 and the external connecting pipe 22.

[0043] The beneficial effects of the central rotating body 100 of the utility model are:

[0044] The central rotating body 100 of the present invention includes an inner pipeline 10 and an outer pipeline 20. The inner pipeline 10 is located inside the outer pipeline 20. The outer pipeline 20 includes an outer input pipe 21, an outer connecting pipe group 220, and an outer output pipe 25 connected in sequence. The outer input pipe 21 is rotatably connected to one end of the outer connecting pipe group 220, and the other end of the outer connecting pipe group 220 is fixedly connected to the outer output pipe 25. The inner pipeline 10 includes an inner input pipe 11, an inner connecting pipe 12, and an inner output pipe 13 connected in sequence. The end of the inner input pipe 11 close to the inner connecting pipe 12 extends into the outer input pipe 21. The inner input pipe 11 is fixedly connected to the outer input pipe 21. The inner input pipe 11 and the inner connecting pipe 12 are rotatably connected. The end of the inner output pipe 13 away from the inner connecting pipe 12 extends out of the outer output pipe 25. The inner output pipe 13 is fixedly connected to the outer output pipe 25. The inlet direction of the external input pipe 21 , the axis of the external connecting pipe group 220 , and the outlet direction of the external output pipe 25 are collinear.

[0045] The central rotating body 100 of the present invention reduces the bends in the external input pipe 21 and the external output pipe 25 by aligning the inlet direction of the external input pipe 21 and the outlet direction of the external output pipe 25, thereby preventing the water flow from flowing through the bend and slowing down the impact, thereby reducing the pressure loss in the water channel.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A central rotating body, characterized in that: The invention comprises an inner pipeline and an outer pipeline, wherein the inner pipeline is located inside the outer pipeline, and the outer pipeline comprises an outer input pipe, an outer connecting pipe group and an outer output pipe connected in sequence, wherein the outer input pipe is rotatably connected to one end of the outer connecting pipe group, and the other end of the outer connecting pipe group is fixedly connected to the outer output pipe, and the inner pipeline comprises an inner input pipe, an inner connecting pipe and an inner output pipe connected in sequence, wherein one end of the inner input pipe close to the inner connecting pipe extends into the outer input pipe, the inner input pipe is fixedly connected to the outer input pipe, the inner input pipe is rotatably connected to the inner connecting pipe, and the inner input pipe and the inner connecting pipe are rotatably connected, and one end of the inner output pipe away from the inner connecting pipe extends out of the outer output pipe, and the inner output pipe is fixedly connected to the outer output pipe, and the inlet direction of the outer input pipe, the axis of the outer connecting pipe group and the outlet direction of the outer output pipe are collinear.

2. The central rotating body according to claim 1, characterized in that: An angle is formed between the inlet direction of the inner input pipe and the inlet direction of the outer input pipe, and an angle is formed between the outlet direction of the inner output pipe and the outlet direction of the outer output pipe.

3. The central rotating body according to claim 1, characterized in that: The external connecting pipe group includes an external connecting pipe and a rotating inner ring. The external input pipe is rotatably connected to one end of the external connecting pipe, and the other end of the external connecting pipe, the rotating inner ring and the external output pipe are fixedly connected in sequence. The rotating inner ring is used to drive the internal output pipe and the external connecting pipe to rotate.

4. The central rotating body according to claim 3, characterized in that: A fixed outer ring is sleeved on the outer side of the rotating inner ring. The rotating inner ring and the fixed outer ring can rotate relatively. A first rotating seal is arranged between the rotating inner ring and the fixed outer ring.

5. The central rotating body according to claim 4, characterized in that: The fixed outer ring is provided with an oil and gas pipeline facing the rotating inner ring.

6. The central rotating body according to claim 3, characterized in that: A groove is arranged at one end of the external connection pipe close to the external input pipe, a rotatable clamping ring is arranged in the groove, and the clamping ring is connected to the external input pipe through a flange.

7. The central rotating body according to claim 3, characterized in that: It also includes a conductive slip ring, which includes a rotating member and a fixed member rotatably connected to the rotating member, the rotating member is fixedly connected to the rotating inner ring, and the fixed member is used for an external power supply.

8. The central rotating body according to claim 3, characterized in that: A first sealing member is provided between the outer output pipe and the rotating inner ring, and a second sealing member is provided between the rotating inner ring and the outer connecting pipe.

9. The central rotating body according to claim 3, characterized in that: A second rotating seal is provided between the external input pipe and the external connecting pipe.

10. A fire truck, characterized in that: It comprises a central rotating body as described in any one of claims 1 to 9.

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