Glass curtain wall window breaking fire-fighting device

Abstract

The invention relates to a glass curtain wall window breaking fire-fighting device which is used for high-rise building fire rescue and comprises a telescopic suspension arm, and the telescopic suspension arm is used for vertically lifting a window breaking device to a target floor from the top of a high-rise building; the window breaking device comprises a hanging basket, a driving assembly, an impact head and an adsorption mechanism, the hanging basket is fixedly installed at the tail end of the telescopic suspension arm, the driving assembly is installed in the hanging basket, and the impact head is connected with the driving assembly and can reciprocate between a first position and a second position under driving of the driving assembly. The glass curtain wall window breaking fire-fighting device can effectively overcome the limitation of traditional fire-fighting equipment in the aspects of operation height, traffic accessibility, environmental adaptability and the like, quickly arrives at a target floor, is firmly fixed to the surface of a glass curtain wall through the adsorption mechanism, can keep stability even facing a double-layer glass curtain wall structure, and is high in practicability. And the integrated window breaking device can be used for efficiently breaking glass, and a channel for a fire extinguishing agent to enter a fire scene is quickly opened up.

Description

Technical Field

[0001] The present invention relates to the technical field of fire-fighting equipment, in particular to a glass curtain wall window-breaking fire-fighting device. Background Art

[0002] With the acceleration of the urbanization process, high-rise buildings are becoming increasingly popular in modern cities. However, high-rise building fires are characterized by rapid fire spread, difficult evacuation, and limited rescue, seriously threatening the lives and property safety of the people.

[0003] At present, China's "Code for Fire Protection Design of Buildings" has formulated relevant requirements for the fire safety of high-rise buildings: residential buildings with a building height exceeding 100 meters must be equipped with an automatic fire extinguishing system and an automatic fire alarm system; for residential buildings with a building height between 54 meters and 100 meters, it is required to install an automatic fire alarm system in the public area, and it is recommended to install a fire detector in the unit; for high-rise residential buildings with a building height below 54 meters, it is recommended to install an automatic fire alarm system in the public area, and it must be installed if fire-fighting facilities need to be linked and controlled. In addition, all public areas of high-rise residential buildings should be equipped with a fire alarm device with a voice function or an emergency broadcast system.

[0004] However, the current code has obvious deficiencies: for high-rise buildings with a building height between 25 meters and 100 meters, especially residential buildings, there is no mandatory requirement to install an automatic fire extinguishing system. This regulatory gap makes it difficult to effectively control such buildings in case of a fire, and is extremely likely to cause heavy casualties and property losses. Traditional fire-fighting and rescue equipment such as fire truck ladders and aerial work platforms are often restricted by multiple factors when dealing with such high-rise fires: firstly, the working height of the equipment itself is limited; secondly, urban road congestion affects the arrival of rescue vehicles at the scene; thirdly, the surrounding environment of the building restricts the operation space. These factors together make it difficult for traditional fire-fighting and rescue methods to meet the growing fire-fighting needs of high-rise buildings.

[0005] Especially during the actual rescue process, due to the inability of fire trucks to reach the fire scene in time, or due to the obstruction of facilities such as parking and greening around the building, it is impossible to effectively carry out operations, greatly delaying the best time for fire fighting. These problems have been fully verified in major fire accidents in many cities in China, highlighting the urgency of developing new high-rise building fire-fighting and rescue equipment. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a glass curtain wall window-breaking fire-fighting device that can efficiently break the glass even in the face of a double-layer glass curtain wall structure and quickly open a channel for the fire extinguishing agent to enter the fire scene.

[0007] To achieve the above object, the glass curtain wall window-breaking fire-fighting device designed by the present invention is used for high-rise building fire rescue, and includes a telescopic lifting arm, and the telescopic lifting arm is used to vertically lift the window-breaking device from the top of the high-rise building to the target floor; the window-breaking device includes a hanging basket, a driving assembly, a punching head and an adsorption mechanism, the hanging basket is fixedly installed at the end of the telescopic lifting arm, the driving assembly is installed in the hanging basket, the punching head is connected to the driving assembly and can reciprocate between a first position and a second position under its drive, wherein the second position is outside the vertical projection of the hanging basket, so that the punching head can contact the outer surface of the glass window of the target floor and break it; when the hanging basket reaches the target floor, the adsorption mechanism extends out and adsorbs on the outer wall of the building or the glass to be broken prior to the driving action of the driving assembly.

[0008] Preferably, the adsorption mechanism is a telescopic pneumatic suction cup structure.

[0009] Preferably, the driving assembly drives the punching head to move in any of the following ways: swing between the first position and the second position along an arc path, reciprocate between the first position and the second position along a straight line path, or launch the punching head from the first position to the second position and return it to the first position through a recovery mechanism.

[0010] Preferably, the driving assembly is a multi-degree-of-freedom robotic arm, the punching head is a firing pin installed at the end of the robotic arm, and a conical needle tip is provided at the front end of the firing pin.

[0011] Preferably, a high-pressure nozzle for fire extinguishing is provided at the end of the robotic arm, and the high-pressure nozzle is connected to an external fire water source through a water supply pipe.

[0012] Preferably, it further includes a guide rail and a rotary support, the guide rail is fixed to the top of the high-rise building and extends along the outer edge of the high-rise building, the rotary support is movably assembled on the guide rail; a telescopic support arm is provided on the rotary support, at least part of the telescopic support arm extends outside the high-rise building, and the top end of the telescopic lifting arm is connected to the distal end of the telescopic support arm extending outside the outer edge of the high-rise building.

[0013] Preferably, the telescopic boom comprises a driving motor, two scissor-type guiding mechanisms arranged in parallel in a vertical direction and two rigid chains, the two rigid chains being arranged between the two scissor-type guiding mechanisms; two parallel chain boxes are provided on the telescopic arm, the driving motor is arranged at the far end of the telescopic arm and located between the two chain boxes; the driving motor is connected to the sprocket in the chain box through a dual-axis transmission mechanism, and the top ends of the two rigid chains extend into the corresponding chain boxes and engage with the corresponding sprockets; a hanging seat opposite to the hanging basket is provided at the far end of the telescopic arm, a guide hole for the rigid chain to pass through is provided on the hanging seat, the upper end of the scissor-type guiding mechanism is fixedly connected to the hanging seat, and the lower end is fixedly connected to the hanging basket.

[0014] Preferably, a water tank is provided on the rotating support, and the water tank is connected to the high-pressure nozzle through a water supply pipe; a hose reel is provided on the telescopic support arm, and the hose reel is adaptably connected to the water supply pipe for retracting and releasing the water supply pipe as the hanging basket moves up and down.

[0015] Preferably, the distal end of the telescopic support arm is pivotally connected to a guide pulley, and the water supply pipe passes around the guide pulley and then passes through the suspension seat to be connected to the high-pressure nozzle.

[0016] The glass curtain wall window breaking fire fighting device designed by the present invention can effectively overcome the limitations of traditional fire fighting equipment in terms of operating height, traffic accessibility and environmental adaptability. The device can quickly reach the target floor and be firmly fixed on the surface of the glass curtain wall through an adsorption mechanism. It can maintain stability even when facing a double-layer glass curtain wall structure, and the integrated window breaking device can efficiently break the glass, quickly open up a channel for the fire extinguishing agent to enter the fire scene, thereby achieving timely fire control. This design not only effectively prevents the spread of fire, but also maximizes the protection of human life and property safety, providing a more reliable, efficient and practical technical solution for high-rise building fire safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of a glass curtain wall window breaking fire fighting device provided in an embodiment of the present application.

[0018] Figure 2 It is a schematic diagram of a specific implementation of the glass curtain wall window breaking fire fighting device provided in an embodiment of the present application.

[0019] Figure 3 This is a schematic diagram of the operation of the glass curtain wall window breaking fire fighting device provided in the embodiment of the present application. Figure 1 .

[0020] Figure 4 This is a schematic diagram of the operation of the glass curtain wall window breaking fire fighting device provided in the embodiment of the present application. Figure 2 .

[0021] Among them: telescopic boom 10, drive motor 11, scissor-type guiding mechanism 12, rigid chain 13, chain box 14, suspension seat 15, hanging basket 20, drive assembly 30, impact head 40, adsorption mechanism 50, high-pressure nozzle 60, water supply pipe 61, guide rail 70, rotary support 71, telescopic support arm 72, water storage tank 73, hose reel 74, guide pulley 75. Specific implementation manners

[0022] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] As Figures 1 to 4 shown, the glass curtain wall window-breaking fire-fighting device described in this embodiment is used for high-rise building fire rescue, aiming to provide a device that can break through height limitations and safely and efficiently demolish the glass curtain wall of high-rise buildings for fire extinguishing and rescue. The device mainly includes: a telescopic boom 10, a hanging basket 20 installed at the end of the telescopic boom, a drive assembly 30 installed in the hanging basket, an impact head 40 connected to the drive assembly, and an adsorption mechanism 50 for adsorbing the window-breaking device to the glass curtain wall.

[0024] Among them, the telescopic boom 10 is mainly used to vertically lift and lower the window-breaking device from the top of a high-rise building to the target floor; in this embodiment, the telescopic boom 10 preferably adopts a structure composed of a drive motor 11, two scissor-type guiding mechanisms 12 arranged in parallel in the vertical direction, and two rigid chains 13. The drive motor 11 precisely controls the telescopic length of the rigid chain 13, and then drives the scissor-type guiding mechanism 12 to expand or contract, so as to realize the stable lifting and lowering of the telescopic boom 10. This structure not only has a high load-bearing capacity, but also can effectively reduce the influence of external factors such as wind force on the stability of the boom in cooperation with the guiding of the scissor-type guiding mechanism 12.

[0025] In this embodiment, the hanging basket 20 is fixedly installed at the end of the telescopic boom 10, and is used to carry components such as the drive assembly 30, the impact head 40, and the adsorption mechanism 50, and provide an installation platform and operation space for these components. In this embodiment, the hanging basket 20 can be made of high-strength alloy materials to ensure its sufficient load-bearing capacity, and the size of the hanging basket should be designed according to actual needs to meet the installation requirements of internal components.

[0026] The impact head 40 is connected to the drive assembly 30 and can reciprocate between a first position and a second position under its drive. The second position is outside the vertical projection of the hanging basket 20, so that the impact head 40 can effectively contact the outer surface of the glass window of the target floor and break it. In this embodiment, the impact head 40 is preferably made of a material with high hardness and wear resistance, such as tungsten steel or alloy steel, to ensure that it has sufficient impact force and service life.

[0027] In addition, when the hanging basket 20 reaches the target floor, the adsorption mechanism 50 extends and adsorbs on the outer wall of the building or the glass to be broken prior to the driving action of the drive assembly 30. The main purpose of the adsorption mechanism 50 is to provide stable and reliable support for the entire window-breaking device, effectively preventing it from shaking or shifting when impacting the glass, and avoiding the impact head deviating from the target position due to shaking, which affects the window-breaking efficiency. In this embodiment, the adsorption mechanism 50 can adopt a retractable pneumatic suction cup structure with a simple structure, strong adsorption force, and easy control. Specifically, multiple suction cups form a local vacuum with the surface of the glass curtain wall to generate a strong adsorption force, thereby firmly fixing the entire window-breaking device on the outer wall of the building, forming a stable connection, effectively reducing the shaking of the hanging basket 20 at high altitude due to factors such as wind, and further reducing the reaction force during window breaking, enabling the drive assembly 30 to more easily drive the impact head 40, improving the window-breaking efficiency, and providing a passage for subsequent fire extinguishing operations.

[0028] In some embodiments, the drive assembly 30 drives the impact head 40 to move in any of the following ways: swing between the first position and the second position along an arc path, reciprocate between the first position and the second position along a straight line path, or launch the impact head 40 from the first position to the second position and return it to the first position through a recovery mechanism. Among them, the swing drive is suitable for window-breaking scenarios that require a large working area. For example, when it is necessary to quickly clean a large area of broken glass, the impact head 40 can be made to repeatedly impact the glass by adjusting the swing angle and frequency, thereby accelerating the breaking of the glass; the reciprocating drive is suitable for window-breaking scenarios that require precise strikes. For example, when it is necessary to quickly break through a double-layer or multi-layer glass curtain wall, the glass can be struck with concentrated force through a linear reciprocating motion, thereby improving the window-breaking efficiency; and the launch drive is suitable for window-breaking scenarios that require long-distance window breaking. For example, when there are obstacles outside the building, or it is necessary to avoid the impact head 40 colliding with the building, the impact head 40 can be launched to the target position for window breaking through the launch method, and the impact head 40 can be safely recovered through the recovery mechanism.

[0029] Specifically, the driving method can be flexibly selected according to the external facade style of the actual deployment building to ensure that the glass curtain wall can be quickly and effectively demolished in case of emergency. More importantly, the design advantage lies in ensuring the recycling of the impact head 40, thus effectively avoiding potential safety hazards caused by unexpected loss of the impact head 40 and the resulting interruption of rescue, and ensuring the continuous progress of the window-breaking operation.

[0030] In a specific embodiment, as Figure 1 , Figure 4 shown, the driving component 30 is a multi-degree-of-freedom robotic arm, the impact head 40 is a firing pin installed at the end of the robotic arm, and a conical needle tip is provided at the front end of the firing pin.

[0031] Specifically, the multi-degree-of-freedom robotic arm can achieve multi-angle and multi-directional movements, and can flexibly adjust the position and posture of the firing pin, so as to adapt to window frames of different shapes, avoid obstacles, and ensure that the firing pin can accurately align with the impact point of the glass. Even if the position of the target window is irregular, inclined, or blocked by other objects, the robotic arm can flexibly adjust its posture to ensure that the firing pin can smoothly contact the glass surface to cope with various complex glass curtain wall structures and improve the window-breaking efficiency and success rate.

[0032] In some embodiments, as Figure 1 , Figure 4 shown, a high-pressure nozzle 60 for fire extinguishing is provided at the end of the robotic arm, and the high-pressure nozzle 60 is connected to an external fire water source through a water supply pipe 61. In this way, after the robotic arm drives the firing pin to quickly break the glass curtain wall and creates conditions for the fire extinguishing agent to enter the room, the robotic arm quickly adjusts its posture, aims the high-pressure nozzle 60 at the fire source, and starts spraying. Since the robotic arm has multiple degrees of freedom, the high-pressure nozzle 60 can achieve multi-directional movements such as up and down, left and right, front and back, and can aim at the fire source at any angle to achieve three-dimensional precise fire extinguishing.

[0033] In some embodiments, as Figure 1 , Figure 2 , Figure 3 shown, it further includes a guide rail 70 and a rotary support 71. The guide rail 70 is fixed on the top of the high-rise building and extends along the outer edge of the high-rise building. The rotary support 71 is movably assembled on the guide rail 70; a telescopic arm 72 is provided on the rotary support 71, and at least part of the telescopic arm 72 extends out of the high-rise building. The top end of the telescopic boom 10 is connected to the distal end of the telescopic arm 72 extending out of the outer edge of the high-rise building.

[0034] With this structural design, the guide rail 70 provides a moving path for the rotating support 71, so that it can move freely along the outer edge of the building, thereby covering all facades of the building. The rotating support 71 can move along the guide rail 70 and can rotate to adjust the window breaking angle, and the telescopic arm 72 is arranged on the rotating support 71 to support the telescopic boom 10 and adjust the distance between the telescopic boom 10 and the building facade. For example, when the fire source is located at the corner of the building, the rotating support 71 can move along the guide rail 70 to a suitable position, and adjust the direction by rotating, so that the telescopic boom 10 can accurately reach the target position to break the window and extinguish the fire. This design greatly improves the coverage and flexibility of the fire window breaking device.

[0035] Specifically, Figure 1 , Figure 2 As shown, the telescopic boom 10 includes a drive motor 11, two scissor-type guide mechanisms 12 arranged in parallel in the vertical direction, and two rigid chains 13. The two rigid chains 13 are arranged between the two scissor-type guide mechanisms 12 to form a compact overall structure; two parallel chain boxes 14 are provided on the telescopic support arm 72, and the drive motor 11 is arranged at the distal end of the telescopic support arm 72 and located between the two chain boxes 14; the drive motor 11 is connected to the sprocket in the chain box 14 through a double-axis transmission mechanism, and the top ends of the two rigid chains 13 extend into the corresponding chain boxes 14 and engage with the corresponding sprockets; a hanging seat 15 opposite to the hanging basket 20 is provided at the distal end of the telescopic support arm 72, and a guide hole for the rigid chain 13 to pass through is provided on the hanging seat 15, and the upper end of the scissor-type guide mechanism 12 is fixedly connected to the hanging seat 15, and the lower end is fixedly connected to the hanging basket 20. In actual application, when high-altitude firefighting is required, the drive motor 11 is started, and the sprocket is driven to rotate through the dual-axis transmission mechanism, thereby driving the rigid chain 13 to extend or retract. The extension and retraction of the rigid chain 13 directly drives the scissor-type guide mechanism 12 to expand or retract, thereby driving the hanging basket 20 to achieve precise lifting and lowering motion. Since the rigid chain has high strength and rigidity, the hanging basket 20 can remain stable even in a strong wind environment, ensuring the smooth progress of window breaking and firefighting operations.

[0036] In some embodiments, Figure 2As shown, a water storage tank 73 is provided on the rotary support 71, and the water storage tank 73 is communicated with the high-pressure nozzle 60 through a water supply pipe 61; a hose reel 74 is provided on the telescopic arm 72, and the hose reel 74 is adaptively connected to the water supply pipe 61 for taking in and paying out the water supply pipe 61 along with the lifting movement of the hanging basket 20. During specific implementation, a quick connector is provided on the water storage tank 73 for quick connection with an external fire water source. At the same time, a certain amount of fire fighting water is pre-stored inside the water storage tank 73 to ensure that in the initial stage of a fire and before the arrival of fire rescue forces at the scene, the initial fire extinguishing can be carried out using the water source carried by itself, so as to quickly control the spread of the fire and gain precious time for subsequent rescue. In addition, the setting of the hose reel 74 can solve the problem of the length change of the water supply pipe 61 during the lifting movement of the hanging basket 20, and while ensuring smooth water supply, it can avoid the winding or breakage of the water supply pipe 61 due to excessive length, affecting the reliability of the fire extinguishing operation. Moreover, the water tank 60 is arranged on the rotary support 71, which can not only effectively utilize the space, but also increase the counterweight for the rotary support 71, thereby significantly improving the stability of the entire device during high-altitude operation and reducing the safety risk.

[0037] In some embodiments, as Figure 1 shown, a guide pulley 75 is pivotally connected to the distal end of the telescopic arm 72, and the water supply pipe 61 bypasses the guide pulley 75 and then passes through the suspension seat 15 to be communicated with the high-pressure nozzle 60. In this way, the guide pulley 75 plays a buffering role. When the telescopic boom 10 moves up and down, the water supply pipe 61 does not bend directly, but slides along the arc of the guide pulley 75, thereby greatly reducing the bending stress borne by the water supply pipe 61 and avoiding the risk of pipe wall damage and leakage caused by excessive bending.

[0038] The glass curtain wall window-breaking fire-fighting device provided in this embodiment can effectively overcome the limitations of traditional fire-fighting equipment in terms of operation height, traffic accessibility, and environmental adaptability. The device can quickly reach the target floor and be firmly fixed on the surface of the glass curtain wall through the adsorption mechanism. Even in the face of a double-layer glass curtain wall structure, it can maintain stability, and the integrated window-breaking device can efficiently break the glass and quickly open a channel for the fire extinguishing agent to enter the fire scene, so as to achieve timely fire control. This design not only effectively prevents the spread of the fire, but also maximally guarantees the safety of personnel's lives and property, providing a more reliable, efficient, and practical technical solution for high-rise building fire safety.

[0039] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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. Therefore, it should not be construed as a limitation to the present invention.

[0040] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected to" 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, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A glass curtain wall window breaking fire fighting device, used for high-rise building fire rescue, characterized in that: It comprises a retractable telescopic boom, which is used to lift the window breaking device vertically from the top of the high-rise building to the target floor; the window breaking device comprises a hanging basket, a driving assembly, an impact head and an adsorption mechanism, the hanging basket is fixedly installed at the end of the retractable boom, the driving assembly is installed in the hanging basket, the impact head is connected to the driving assembly and can reciprocate between a first position and a second position under the drive of the driving assembly, wherein the second position is located outside the vertical projection of the hanging basket so that the impact head can contact the outer surface of the glass window of the target floor and smash it; when the hanging basket reaches the target floor, the adsorption mechanism extends out and adsorbs on the outer wall of the building or the glass to be broken before the driving action of the driving assembly.

2. The glass curtain wall window breaking fire fighting device according to claim 1 is characterized in that: The adsorption mechanism is a retractable pneumatic suction cup structure.

3. The glass curtain wall window breaking fire fighting device according to claim 1 is characterized in that: The driving assembly drives the impact head to move in any of the following ways: swinging between the first position and the second position in a circular arc path, reciprocating between the first position and the second position in a straight line path, or launching the impact head from the first position to the second position and returning it to the first position through a recovery mechanism.

4. The glass curtain wall window breaking fire fighting device according to claim 1, characterized in that: The driving component is a multi-degree-of-freedom mechanical arm, the impact head is a striker installed at the end of the mechanical arm, and a conical needle head is arranged at the front end of the striker.

5. The glass curtain wall window breaking fire fighting device according to claim 4, characterized in that: A high-pressure nozzle for fire extinguishing is arranged at the end of the mechanical arm, and the high-pressure nozzle is connected to an external fire water source through a water supply pipe.

6. The glass curtain wall window breaking fire fighting device according to claim 5, characterized in that: It also includes a guide rail and a rotating support, wherein the guide rail is fixed to the top of the high-rise building and extends along the outer edge of the high-rise building, and the rotating support is movably mounted on the guide rail; a telescopic support arm is arranged on the rotating support, and the telescopic support arm at least partially extends out of the high-rise building, and the top end of the telescopic boom is connected to the far end of the telescopic support arm extending out of the outer edge of the high-rise building.

7. The glass curtain wall window breaking fire fighting device according to claim 6, characterized in that: The telescopic boom comprises a driving motor, two scissor-type guiding mechanisms arranged in parallel in a vertical direction, and two rigid chains, wherein the two rigid chains are arranged between the two scissor-type guiding mechanisms; two parallel chain boxes are arranged on the telescopic arm, and the driving motor is arranged at the far end of the telescopic arm and located between the two chain boxes; the driving motor is connected to the sprocket in the chain box through a double-axis transmission mechanism, and the top ends of the two rigid chains extend into the corresponding chain boxes and engage with the corresponding sprockets; a hanging seat opposite to the hanging basket is provided at the far end of the telescopic arm, and a guide hole for the rigid chain to pass through is provided on the hanging seat, and the upper end of the scissor-type guiding mechanism is fixedly connected to the hanging seat, and the lower end is fixedly connected to the hanging basket.

8. The glass curtain wall window breaking fire fighting device according to claim 7, characterized in that: A water tank is provided on the rotating support, and the water tank is connected to the high-pressure nozzle through a water supply pipe; a hose reel is provided on the telescopic support arm, and the hose reel is adaptably connected to the water supply pipe and is used to retract and release the water supply pipe as the hanging basket moves up and down.

9. The glass curtain wall window breaking fire fighting device according to claim 8, characterized in that: The distal end of the telescopic support arm is pivotally connected with a guide pulley, and the water supply pipe passes around the guide pulley and then passes through the suspension seat to be connected with the high-pressure nozzle.

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