Fire hose

Abstract

The utility model relates to a fire-fighting pipe, which comprises an outer pipe configured as a hollow pipe, an inner pipe configured as a hollow pipe, a connecting pipe fixedly arranged at the end of the outer pipe, and a limiting piece arranged at the end of the inner pipe away from the outer pipe, wherein the inner pipe is capable of slidingly extending and retracting relative to the outer pipe and can be accommodated in the outer pipe; when the inner pipe is accommodated in the outer pipe, the limiting piece is buckled with the stepped limiting surface of the connecting pipe to lock the outer pipe and the inner pipe; the fire-fighting pipe can be completely accommodated in the outer pipe in a non-use state, the extension length of the fire-fighting pipe on the unmanned aerial vehicle is effectively shortened, the fire-fighting pipe does not exceed the lateral coverage range of the unmanned aerial vehicle, the air resistance and unbalanced moment during flight are reduced, and the stability of the flight attitude of the unmanned aerial vehicle is ensured.

Description

Technical Field

[0001] This utility model relates to the field of fire protection technology, and in particular to a fire protection pipe. Background Technology

[0002] In fire emergency rescue scenarios, drones, with their flexibility, maneuverability, and ability to quickly reach complex and dangerous areas, have become crucial tools for firefighting operations. However, in practical applications, the lateral length of the fire hoses carried by drones significantly exceeds the lateral coverage area of ​​the drone itself. Since the fire hoses themselves have a certain weight and volume, excessive lateral length significantly affects the drone's center of gravity distribution during flight. The stability of the drone's center of gravity is one of the core elements ensuring its safe and stable flight. A shift in the center of gravity can lead to loss of flight control, deviation from the planned flight path, and even serious accidents such as crashes, thereby affecting the efficiency and success rate of firefighting operations. Utility Model Content

[0003] The purpose of this invention is to provide a fire-fighting pipe to solve the problem in the prior art where the fire-fighting pipe extends beyond the lateral coverage area of ​​the drone and affects its flight attitude.

[0004] The technical solution of this utility model is: a fire-fighting pipe, comprising: The outer tube is configured as a hollow tube; The inner tube is configured as a hollow tube, which slides and extends relative to the outer tube and can be housed inside the outer tube; A connecting pipe is fixed to the end of the outer pipe, and its end face away from the inner pipe forms a stepped limiting surface; A limiting member is provided at the end of the inner tube away from the outer tube. When the inner tube is housed in the outer tube, the limiting member engages with the stepped limiting surface of the connecting tube to lock the outer tube and the inner tube.

[0005] Preferably, the limiting member includes: The mounting part is threadedly connected to the end of the inner tube away from the outer tube; The connecting part has one end fixed to the mounting part and extends toward the connecting pipe, and the connecting part is elastic. A limiting part is fixed on the side of the connecting part facing the inner tube. When the inner tube is housed in the outer tube, the limiting part passes over the connecting tube and engages with the stepped limiting surface.

[0006] Preferably, the connecting portion is bent toward the outer wall of the inner tube.

[0007] Preferably, the end of the inner tube is also threadedly connected to a nozzle, the end face of which abuts against the mounting portion of the limiting member to restrict the axial movement of the limiting member, and the nozzle is in communication with the inner tube.

[0008] Preferably, the connecting pipe includes a first pipe segment, a second pipe segment, and a third pipe segment that are coaxially connected in sequence. The first pipe segment is slidably connected to the outer wall of the inner pipe. The inner diameter of the second pipe segment is larger than the inner diameter of the first pipe segment, so that when the inner pipe and the second pipe segment are aligned, a first annular gap is formed between them and the outer wall of the inner pipe. The inner diameter of the third pipe segment is larger than the inner diameter of the second pipe segment. The end of the outer pipe is fixedly connected to the third pipe segment. The stepped limiting surface is formed on the end face of the third pipe segment away from the inner pipe.

[0009] Preferably, the inner wall of the second pipe section is provided with a plurality of sealing grooves arranged in an array along its length, and a sealing ring is provided in the sealing groove to seal the gap between the inner pipe and the second pipe section.

[0010] Preferably, a connecting pipe section is fixedly provided at the end of the inner tube near the connecting pipe. The connecting pipe section includes a first mating section, a second mating section, and a third mating section that are coaxially connected in sequence. The first mating section is fixedly connected to the inner wall of the inner tube. The outer diameter of the second mating section is larger than the outer diameter of the first mating section, and its end face abuts against the end face of the inner tube. The outer diameter of the third mating section is larger than the outer diameter of the second mating section and is slidably connected to the inner wall of the outer tube.

[0011] Preferably, when the second mating section is directly opposite the second pipe section, a second annular gap with a thickness less than the first annular gap is formed between the second mating section and the inner wall of the second pipe section.

[0012] Compared with the prior art, the advantages of this utility model are: The sliding and telescopic outer and inner tubes, together with the stepped limiting surface of the connecting tube and the locking structure of the limiting piece at the end of the inner tube, allow the fire hose to be completely retracted into the outer tube when not in use. This effectively shortens the extension length of the fire hose on the drone, preventing the fire hose from exceeding the drone's lateral coverage range, thereby reducing air resistance and unbalanced torque during flight and ensuring the stability of the drone's flight attitude. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a structural schematic diagram of a fire-fighting pipe according to the present invention; Figure 2 This is a cross-sectional view of the connection between the inner and outer tubes of this utility model. Figure 3This is a schematic diagram of the connecting pipe described in this utility model; Figure 4 This is a schematic diagram of the structure of the connecting pipe section described in this utility model; Figure 5 This is a cross-sectional structural diagram of the limiting component of a fire-fighting pipe according to the present invention; Figure 6 This is a schematic diagram of the limiting component described in this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Inner pipe; 2. Outer pipe; 3. Connecting pipe; 31. First pipe section; 32. Second pipe section; 33. Third pipe section; 34. Sealing groove; 35. First annular gap; 36. Second annular gap; 4. Sealing ring; 5. Connecting pipe section; 51. First mating section; 52. Second mating section; 53. Third mating section; 6. Limiting component; 61. Mounting part; 62. Connecting part; 63. Limiting part; 7. Nozzle; 8. Quick-release structure. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0017] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0018] like Figure 1As shown, a fire-fighting pipe includes an inner pipe 1 and an outer pipe 2, both of which are hollow. The inner pipe 1 and the outer pipe 2 slide and contract relative to each other, and can be accommodated within the outer pipe 2. A connecting pipe 3 is fixedly provided at the end of the outer pipe 2 near the inner pipe 1, and the end face of the connecting pipe 3 away from the inner pipe 1 forms a stepped limiting surface. A limiting member 6 is fixedly provided at the end of the inner pipe 1 away from the outer pipe 2. When the inner pipe 1 is accommodated within the outer pipe 2, the limiting member 6 engages with the stepped limiting surface of the connecting pipe 3 to lock the outer pipe 2 and the inner pipe 1.

[0019] like Figure 2 and Figure 3 As shown, the connecting pipe 3 includes a first pipe section 31, a second pipe section 32, and a third pipe section 33 connected in sequence, all three coaxially connected. The first pipe section 31 fits against the outer periphery of the inner pipe 1, and the first pipe section 31 and the inner pipe 1 are slidably connected. The inner diameter of the second pipe section 32 is larger than the inner diameter of the first pipe section 31. When the inner pipe 1 and the second pipe section 32 are in a directly opposite position, a first annular gap 35 is formed between the inner wall of the second pipe section 32 and the outer wall of the inner pipe 1.

[0020] The inner wall of the second pipe section 32 is provided with several sealing grooves 34, all of which are annular grooves, and the sealing grooves 34 are arranged in an array along the length of the second pipe section 32. Each sealing groove 34 is provided with a sealing ring 4. When a gap is formed between the inner pipe 1 and the second pipe section 32, the sealing ring 4 seals the inner pipe 1 and the second pipe section 32. The connecting pipe 3 and the inner pipe 1 form a movable sealing barrier, ensuring that even when the inner pipe 1 is expanding or contracting, the section where the first annular gap 35 is located can maintain a reliable seal, preventing fluid leakage from the gap between the inner pipe 1 and the connecting pipe 3.

[0021] The inner diameter of the third pipe segment 33 is larger than that of the second pipe segment 32. The difference in inner diameter between the third pipe segment 33 and the second pipe segment 32 forms a socket joint to facilitate connection with the outer pipe 2. The third pipe segment 33 is fixedly connected to the outer pipe 2 through this socket joint; that is, the inner wall of the third pipe segment 33 is in contact with the inner wall of the outer pipe 2. A stepped limiting surface is formed on the end face of the third pipe segment 33 away from the inner pipe 1.

[0022] like Figure 2 and Figure 4As shown, a connecting pipe section 5 is fixedly provided on the end face of the inner tube 1. The connecting pipe section 5 includes a first mating section 51, a second mating section 52, and a third mating section 53 connected in sequence. The outer wall of the first mating section 51 is attached to and fixedly connected to the inner wall of the inner tube 1. The outer diameter of the second mating section 52 is larger than the outer diameter of the first mating section 51, and the end face of the second mating section 52 abuts against the end face of the inner tube 1. The end face of the second mating section 52 is larger than the outer diameter of the inner tube 1 and smaller than the inner wall of the second pipe section 32. That is, when the second mating section 52 and the second pipe section 32 are in a directly opposite position, a second annular gap 36 is formed between the inner wall of the second pipe section 32 and the outer wall of the second mating section 52. The thickness of the second annular gap 36 is smaller than the thickness of the first annular gap 35. A high-pressure sealing zone is set between the second pipe section 32 and the second mating section 52, and the sealing ring 4 between them is further compressed. When the fluid pressure increases, the pressure at this point is greater than the pressure at the first annular gap 35, effectively preventing leakage and achieving adaptive improvement of the sealing level based on location, which greatly enhances its sealing reliability under high pressure conditions.

[0023] The outer diameter of the third mating section 53 is larger than the outer diameter of the second mating section 52. The outer diameter of the third mating section 53 is attached to and slides against the inner wall of the outer tube 2.

[0024] like Figure 5 and Figure 6 As shown, the limiting member 6 includes a mounting portion 61, a connecting portion 62, and a limiting portion 63. The mounting portion 61 is constructed as a ring structure and has internal threads. The outer circumferential side of the inner tube 1 away from the outer tube 2 has external threads, and the mounting portion 61 is threadedly connected to the inner tube 1. One end of the connecting portion 62 is fixed to the mounting portion 61, and the other end extends towards the connecting tube 3, and the connecting portion 62 is elastic. Preferably, the connecting portion 62 is bent towards the outer wall of the inner tube 1. The limiting portion 63 is fixed to the side of the connecting portion 62 facing the inner tube 1, and the limiting portion 63 is located at a position of the connecting portion 62 away from the mounting portion 61.

[0025] The inner tube 1 is also threadedly connected to a nozzle 7, which restricts the movement of the limiting member 6. After the nozzle 7 is tightened, its end face abuts against the mounting part 61 of the limiting member 6, forming an axial pressing structure to prevent the limiting member 6 from rotating or loosening under vibration. In this embodiment, the inner diameter of the nozzle 7 gradually decreases to increase the pressure of the fluid ejected from the nozzle 7. In other embodiments, the nozzle 7 can be configured as an adjustable nozzle 7, which has an adjustment core inside. By rotating the outer shell of the nozzle 7, the cross-sectional area of ​​the water flow channel can be changed, thereby achieving stepless adjustment of the range and flow rate to meet the needs of different fire conditions.

[0026] When the inner tube 1 is housed within the outer tube 2, the third mating section 53 of the connecting joint 5 fixed at the end of the inner tube 1 slides into the third section 33 of the connecting tube 3, while the connecting part 62 of the limiting member 6 is elastically bent away from the inner tube 1 by the pressure of the outer wall of the third section 33. As the inner tube 1 continues to shrink, when the limiting part 63 passes the stepped limiting surface, the connecting part 62 quickly rebounds inward under its own elastic restoring force, so that the limiting part 63 is firmly fastened to the stepped limiting surface of the connecting tube 3, thereby realizing the mechanical interlocking of the inner tube 1 and the outer tube 2 in the shrunken state, effectively preventing them from accidentally extending due to vibration during transportation or motor operation.

[0027] In this embodiment, the fire-fighting pipe is integrated into the bottom of the drone via a quick-release structure 8. The end of the outer pipe 2 away from the nozzle 7 is provided with a water supply interface for connecting to an external water pump, thereby providing a fire-fighting water source for the entire pipe body.

[0028] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and therefore, all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within this utility model.

Claims

1. A fire-fighting pipe, characterized in that, include: The outer tube (2) is configured as a hollow tube; The inner tube (1) is configured as a hollow tube, which slides and extends relative to the outer tube (2) and can be housed inside the outer tube (2); The connecting pipe (3) is fixed to the end of the outer pipe (2), and its end face away from the inner pipe (1) forms a stepped limiting surface; The limiting member (6) is located at the end of the inner tube (1) away from the outer tube (2). When the inner tube (1) is housed in the outer tube (2), the limiting member (6) engages with the stepped limiting surface of the connecting tube (3) to lock the outer tube (2) and the inner tube (1).

2. A fire-fighting pipe according to claim 1, characterized in that: The limiting member (6) includes: Mounting part (61) is threaded to the end of the inner tube (1) away from the outer tube (2); The connecting part (62) is fixed at one end to the mounting part (61) and extends toward the connecting pipe (3). The connecting part (62) is elastic. The limiting part (63) is fixed on the side of the connecting part (62) facing the inner tube (1). When the inner tube (1) is housed in the outer tube (2), the limiting part (63) passes over the connecting tube (3) and engages with the stepped limiting surface.

3. A fire-fighting pipe according to claim 2, characterized in that: The connecting part (62) bends toward the outer wall of the inner tube (1).

4. A fire-fighting pipe according to claim 2, characterized in that: The end of the inner tube (1) is also threadedly connected to a nozzle (7). The end face of the nozzle (7) abuts against the mounting part (61) of the limiting member (6) to restrict the axial movement of the limiting member (6). The nozzle (7) is connected to the inner tube (1).

5. A fire-fighting pipe according to claim 2, characterized in that: The connecting pipe (3) includes a first pipe section (31), a second pipe section (32), and a third pipe section (33) that are coaxially connected in sequence. The first pipe section (31) is slidably connected to the outer wall of the inner pipe (1). The inner diameter of the second pipe section (32) is larger than the inner diameter of the first pipe section (31) so that when the inner pipe (1) and the second pipe section (32) are facing each other, a first annular gap (35) is formed between them and the outer wall of the inner pipe (1). The inner diameter of the third pipe section (33) is larger than the inner diameter of the second pipe section (32). The end of the outer pipe (2) is fixedly connected to the third pipe section (33). The stepped limiting surface is formed on the end face of the third pipe section (33) away from the inner pipe (1).

6. A fire-fighting pipe according to claim 5, characterized in that: The inner wall of the second pipe section (32) is provided with a plurality of sealing grooves (34) arranged in an array along its length direction. A sealing ring (4) is provided in the sealing groove (34) to seal the gap between the inner pipe (1) and the second pipe section (32).

7. A fire-fighting pipe according to claim 6, characterized in that: The inner tube (1) is fixedly provided with a connecting pipe section (5) near the end of the connecting pipe (3). The connecting pipe section (5) includes a first mating section (51), a second mating section (52) and a third mating section (53) that are coaxially connected in sequence. The first mating section (51) is fixedly connected to the inner wall of the inner tube (1). The outer diameter of the second mating section (52) is larger than the outer diameter of the first mating section (51), and its end face abuts against the end face of the inner tube (1). The outer diameter of the third mating section (53) is larger than the outer diameter of the second mating section (52) and is slidably connected to the inner wall of the outer tube (2).

8. A fire-fighting pipe according to claim 7, characterized in that: When the second mating section (52) is directly opposite the second pipe section (32), a second annular gap (36) with a thickness less than the first annular gap (35) is formed between the second mating section (52) and the inner wall of the second pipe section (32).

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