Protective fence structure for building construction
Through the mechanically linked rotating and spraying mechanisms, the construction site protective fencing achieves full coverage and uniform dust suppression, solving the problem of uneven spraying in existing technologies and improving the dust suppression effect at the construction site.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-19
- Publication Date
- 2026-04-14
AI Technical Summary
The existing dust suppression system on the top of the protective fence of construction site cannot achieve uniform coverage of the entire height, cross section and multiple angles, resulting in poor dust suppression effect, especially in the middle and lower areas where dust is easy to spread.
The system employs a rotating mechanism, a lifting mechanism, a connecting mechanism, and a deceleration mechanism. Through mechanical linkage design, it achieves fully automatic reciprocating motion of the sliding plate seat. The spray head is adjusted accordingly in the vertical direction and angle to ensure full coverage and uniformity of the spraying area.
It achieves uniform dust suppression across the entire height range of the construction site, eliminates blind spots in spraying, and improves dust suppression efficiency and operational efficiency. It is particularly suitable for complex environments such as construction sites and mining operations.
Smart Images

Figure CN121853848A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of building construction technology, and specifically relates to a protective enclosure structure for building construction. Background Technology
[0002] Construction site protective fencing (hereinafter referred to as construction fencing) is a facility that continuously and encloses the construction site from the external environment during construction. It is usually composed of panels, columns, foundations / bases, connecting and reinforcing components, and is equipped with auxiliary facilities such as public service advertisements, lighting, and dust suppression spraying. Its core functions are: to ensure the safety of construction, pedestrians and vehicles, to suppress dust and noise pollution, to maintain urban order, and to meet the requirements of civilized construction and supervision.
[0003] Construction site fencing, as an important facility for on-site environmental management, is generally used for dust suppression, with top-mounted spraying being the most common technique. This solution involves installing spray pipes and atomizing nozzles on the top of the fencing. Water is pressurized by a pump to form a fine mist, which is then sprayed down from above the fencing. The aim is to absorb dust particles in the air through the water mist, thereby suppressing the spread of dust. However, existing top-spraying systems have revealed significant limitations in practical applications: because the nozzles are only concentrated in a single location on the top of the enclosure (usually the top edge or middle area), and the spraying direction is fixed downwards, the water mist coverage is highly dependent on the nozzle height and pressure, making it difficult to achieve uniform coverage of the entire height, cross-section, and multiple angles of the enclosure. Specifically, while dust near the top area can be directly intercepted, the middle and lower parts (especially the critical dust zone 0.5–1.5 meters from the ground, which is easily affected by construction machinery movement, material handling, and personnel activity, resulting in a large amount of dust) have already been diluted by gravity settling or diffusion by the time the water mist arrives, significantly reducing the wetting effect. At the same time, if the nozzle spacing is too large or the pressure is insufficient, unevenness will occur, with some areas being overly wet and the surrounding area dry, and dust in some areas continuing to spread outside the enclosure, making it difficult to achieve the expected overall dust reduction efficiency. Summary of the Invention
[0004] The purpose of this invention is to provide a protective fencing structure for construction sites, in order to solve the problem mentioned in the background art that existing construction site protective fencing often uses top spraying for dust suppression, which cannot achieve uniform dust suppression and results in poor dust suppression effect.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A protective enclosure structure for construction sites includes:
[0007] Enclosure seat;
[0008] A fence frame, which is fixedly connected to the top of the fence base;
[0009] A rotating mechanism is installed on the outside of one side of the enclosure frame. The rotating mechanism includes a first mounting plate, a working motor is fixedly connected to the outside of one side of the first mounting plate, a rotating wheel is fixedly connected to the output end of the working motor, and a transmission belt is sleeved on the outside of the rotating wheel.
[0010] A lifting mechanism is connected to the outside of a rotating mechanism. The lifting mechanism includes a transmission wheel, a first hinge rod connected to the outside of the transmission wheel, a second hinge rod rotatably connected to the outside of the first hinge rod, a sliding plate seat connected to the top of the second hinge rod, and a sliding rail inserted inside the sliding plate seat.
[0011] The connecting mechanism includes a second mounting plate, which is fixedly connected to the outer side wall of the enclosure frame. A rack plate is mounted on the outer side wall of the second mounting plate, and a first rotating gear meshes on the outer side wall of the rack plate. A reduction mechanism is connected to one side of the first rotating gear, and a spraying mechanism is connected to the outside of the reduction mechanism. The spraying mechanism includes a spray head, which is used to spray dust suppression mist.
[0012] Preferably, the inner wall of the enclosure seat is provided with enclosure baffles, and multiple sets of enclosure baffles are arranged longitudinally.
[0013] Preferably, one side of the transmission belt is sleeved on the outside of the transmission wheel, the transmission belt is used to drive the rotation of the transmission wheel, the inner side wall of the transmission belt is provided with a groove, and the outer side walls of the rotating wheel and the transmission wheel are provided with grooves that match the inner side wall of the transmission belt.
[0014] Preferably, the second hinge rod is mounted outside the first hinge rod via a pivot, and the second hinge rod is rotatably connected to the sliding plate seat.
[0015] Preferably, the bottom end of the first hinge rod is fixedly connected to the outer wall of the transmission wheel by screws, the sliding plate seat is slidably connected to the outside of the sliding rail, and the sliding rail is fixedly connected to the outer wall of the second mounting plate.
[0016] Preferably, the rack plate is vertically disposed on the outer side wall of the second mounting plate, and one side of the first rotating gear abuts against the outside of the rack plate.
[0017] Preferably, the deceleration mechanism includes a mounting cover, a connecting rod is installed inside the mounting cover, a second rotating gear is sleeved on the outside of the connecting rod, meshing teeth are engaged on the outside of the second rotating gear, a first conical tooth is fixedly connected to one side of the meshing teeth, and a second conical tooth is engaged on the outside of the first conical tooth.
[0018] Preferably, the connecting rod, the meshing tooth, and the second conical tooth are all rotatably connected inside the mounting cover, and the first conical tooth and the second conical tooth are diagonally arranged.
[0019] Preferably, the spraying mechanism includes an installation pipe, a water supply pipe is installed on the outside of the installation pipe, and multiple spray heads are provided on the outer side wall of the installation pipe.
[0020] Preferably, one side of the mounting pipe is fixedly connected to the outside of the second conical tooth, one end of the water supply pipe is connected to the outside of the water pipe, and a plurality of spray heads are arranged horizontally and evenly on the outer side wall of the mounting pipe.
[0021] Compared with the prior art, the beneficial effects of the present invention are:
[0022] (1) This invention, through the setting of a rotating mechanism, lifting mechanism, connecting mechanism, and deceleration mechanism, enables the power output shaft of the working motor to drive the rotating wheel to start rotating at a constant speed when the working motor starts running. Through a high-strength transmission belt, a stable friction transmission connection is formed with the transmission wheel, thereby driving the transmission wheel to perform synchronous circular motion. The transmission system adopts the principle of crank-connecting rod mechanism, which converts the rotational motion of the transmission wheel into the reciprocating swing of the first hinge rod. When the transmission wheel rotates clockwise, the first hinge rod swings downward to the lowest point. Through the hinge linkage of the second hinge rod, the sliding plate seat is pushed down along the sliding track until it reaches the bottom position of the fence. Conversely, when the transmission wheel rotates counterclockwise to a specific angle, the first hinge rod swings upward to the highest point. Through the mechanical transmission of the second hinge rod, the sliding plate seat is pulled up along the track to slide to the top limit position of the fence. This mechanical transmission design realizes the fully automatic reciprocating cyclic motion of the sliding plate seat in the vertical direction, and its motion stroke completely covers the entire vertical height range of the fence. By integrating the reduction gear transmission mechanism with the spray head and mounting it on the follow-up sliding plate seat, the spraying system can synchronously complete the vertical displacement from the bottom to the top of the enclosure with the sliding plate seat, and continuously maintain directional dust suppression spray during the movement.
[0023] (2) The present invention, through the provision of a second mounting plate, a rack plate, a mounting cover, and a mounting tube, ensures that when the sliding plate seat reciprocates linearly on the sliding track, its built-in first rotating gear continuously meshes with the fixed rack plate. This meshing process drives the first rotating gear to rotate, and then transmits the rotational motion to the second rotating gear through the connecting rod. This transmission system forms a reduction mechanism through the precise meshing of the first and second conical teeth, converting high-speed rotation into low-speed, high-torque output, ensuring the smoothness of the spray head angle adjustment. Specifically, during the process of the sliding plate seat moving from the bottom to the top of the track, the mounting tube is driven by the transmission system to generate a 180° circumferential rotation, so that the spray head fixed at the end of the mounting tube synchronously completes the attitude conversion from vertical upward spraying to vertical downward spraying; conversely, when the sliding plate seat returns from the top to the bottom, the transmission system operates in reverse, causing the spray head to gradually return from downward spraying to upward spraying. Through this reciprocating mechanical linkage mechanism, combined with the complete stroke movement of the sliding plate seat, the spray head can achieve continuous angle adjustment within a 180° range in the vertical plane. Combined with the horizontal coverage formed by the reciprocating motion of the track, a three-dimensional intelligent dust suppression system with full coverage is finally constructed, which improves the uniformity and operational efficiency of spray dust suppression. It is particularly suitable for complex environments such as construction sites and mining operations that require multi-angle dust suppression. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention;
[0025] Figure 2 For the present invention Figure 1 Overall structural diagram of the central rotating mechanism;
[0026] Figure 3 For the present invention Figure 1 A schematic diagram of the overall structure of the lifting mechanism;
[0027] Figure 4 For the present invention Figure 1 Overall structural diagram of the connecting mechanism;
[0028] Figure 5 For the present invention Figure 1 Overall structural diagram of the intermediate speed reduction mechanism;
[0029] Figure 6 For the present invention Figure 1 A schematic diagram of the overall structure of the spraying mechanism.
[0030] In the diagram: 1. Fence base; 2. Fence frame; 3. Fence baffle; 4. Rotating mechanism; 401. First mounting plate; 402. Working motor; 403. Rotating wheel; 404. Transmission belt; 5. Lifting mechanism; 501. Transmission wheel; 502. First hinge rod; 503. Second hinge rod; 504. Sliding plate base; 505. Sliding track; 6. Connecting mechanism; 601. Second mounting plate; 602. Rack plate; 603. First rotating gear; 7. Reduction mechanism; 701. Mounting cover; 702. Connecting rod; 703. Second rotating gear; 704. Meshing teeth; 705. First conical tooth; 706. Second conical tooth; 8. Spraying mechanism; 801. Mounting pipe; 802. Water supply pipe; 803. Spray head. Detailed Implementation
[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0032] Example 1:
[0033] Please see Figures 1-6 As shown, a protective enclosure structure for construction sites includes:
[0034] Enclosure seat 1;
[0035] The enclosure frame 2 is fixedly connected to the top of the enclosure base 1;
[0036] Rotating mechanism 4 is installed on the outside of one side of the enclosure frame 2. The rotating mechanism 4 includes a first mounting plate 401. A working motor 402 is fixedly connected to the outside of one side of the first mounting plate 401. A rotating wheel 403 is fixedly connected to the output end of the working motor 402. A transmission belt 404 is sleeved on the outside of the rotating wheel 403.
[0037] The lifting mechanism 5 is connected to the outside of the rotating mechanism 4. The lifting mechanism 5 includes a transmission wheel 501. A first hinge rod 502 is connected to the outside of the transmission wheel 501. A second hinge rod 503 is rotatably connected to the outside of the first hinge rod 502. A sliding plate seat 504 is connected to the top of the second hinge rod 503. A sliding rail 505 is inserted inside the sliding plate seat 504.
[0038] The connecting mechanism 6 includes a second mounting plate 601, which is fixedly connected to the outer wall of the enclosure frame 2. A rack plate 602 is mounted on the outer wall of the second mounting plate 601, and a first rotating gear 603 meshes on the outer wall of the rack plate 602. A reduction mechanism 7 is connected to one side of the first rotating gear 603. A spraying mechanism 8 is connected to the outside of the reduction mechanism 7. The spraying mechanism 8 includes a spray head 803 for spraying dust suppression mist. An enclosure baffle 3 is provided on the inner wall of the enclosure seat 1. Multiple sets of enclosure baffles 3 are arranged longitudinally. One side of the transmission belt 404 is sleeved on the outside of the transmission wheel 501. The transmission belt 404 is used to drive the rotation of the transmission wheel 501. A groove is provided on the inner wall of the transmission belt 404. Grooves matching the inner wall of the transmission belt 404 are provided on the outer walls of the rotating wheel 403 and the transmission wheel 501.
[0039] Specifically, after the working motor 402 starts working, it drives the rotating wheel 403 to rotate with the transmission belt 404, so that after the transmission wheel 501 rotates, it can drive the first hinge rod 502 and the second hinge rod 503 to hinge, thereby enabling the sliding plate seat 504 to move up and down on the sliding track 505.
[0040] As can be seen from the above, when the working motor 402 starts running, its power output shaft drives the rotating wheel 403 to rotate synchronously. Mechanical energy is transmitted to the transmission wheel 501 through the tightly connected transmission belt 404, driving the transmission wheel 501 to perform stable and reliable circular motion. This motion process is transformed into the regular oscillation of the first hinge rod 502 through a mechanical linkage structure. When the first hinge rod 502 rotates to its lowest position with the transmission wheel 501, the second hinge rod 503, which is hinged to it, is synchronously pushed to the bottom of its stroke, thereby pushing the sliding plate seat 504 to slide down along the sliding track 505 until it reaches the bottom of the enclosure. Conversely, when the first hinge rod 502 rotates to its highest point, the second hinge rod 503 pulls the sliding plate seat 504 up to the top position of the enclosure. Through the crank-connecting rod mechanism, the continuous reciprocating motion of the sliding plate seat 504 in the vertical direction is realized. In particular, the motion mechanism and the deceleration mechanism 7 form a collaborative working mechanism to ensure that the spray head 803 installed at the output end of the deceleration mechanism can follow the lifting trajectory of the sliding plate seat 504 and perform uniform spraying operations from bottom to top or from top to bottom on the entire vertical surface of the fence. This effectively solves the problem of dust suppression blind spots caused by the traditional fence that can only spray at a fixed position at the top, and improves the dust suppression effect across the entire height range of the construction site.
[0041] refer to Figure 2 and Figure 6As shown, the second hinge rod 503 is mounted outside the first hinge rod 502 via a rotating shaft. The second hinge rod 503 is rotatably connected to the sliding plate seat 504. The bottom end of the first hinge rod 502 is fixedly connected to the outer wall of the transmission wheel 501 by screws. The sliding plate seat 504 is slidably connected to the outside of the sliding rail 505. The sliding rail 505 is fixedly connected to the outer wall of the second mounting plate 601. The rack plate 602 is vertically arranged on the outer wall of the second mounting plate 601. One side of the first rotating gear 603 abuts against the outside of the rack plate 602.
[0042] Specifically, when the first hinge rod 502 rotates to the bottom, the second hinge rod 503 rotates hinged to the first hinge rod 502, causing the second hinge rod 503 to move to the bottommost position, driving the sliding plate seat 504 to move below the sliding track 505. When the first hinge rod 502 rotates to the top, the second hinge rod 503 moves to the top, driving the sliding plate seat 504 to move to the top of the sliding track 505, thus realizing the sliding plate seat 504 reciprocating up and down on the sliding track 505.
[0043] Example 2:
[0044] refer to Figures 1-6 As shown, the deceleration mechanism 7 includes a mounting cover 701. A connecting rod 702 is installed inside the mounting cover 701. A second rotating gear 703 is sleeved on the outside of the connecting rod 702. The second rotating gear 703 has meshing teeth 704 on its outside. A first conical tooth 705 is fixedly connected to one side of the meshing tooth 704. A second conical tooth 706 meshes with the outside of the first conical tooth 705. The connecting rod 702, the meshing tooth 704, and the second conical tooth 706 are all inside the mounting cover 701. The first conical tooth 705 and the second conical tooth 706 are diagonally arranged. The spraying mechanism 8 includes an installation pipe 801, a water supply pipe 802 is installed on the outside of the installation pipe 801, and multiple spray heads 803 are arranged on the outer side wall of the installation pipe 801. One side of the installation pipe 801 is fixedly connected to the outside of the second conical tooth 706, and one end of the water supply pipe 802 is connected to the outside of the water pipe. The multiple spray heads 803 are arranged horizontally and evenly on the outer side wall of the installation pipe 801.
[0045] Specifically, the precision reduction transmission system composed of the second rotating gear 703, meshing gear 704, first conical gear 705, and second conical gear 706 can achieve precise and slow circumferential rotation control of the mounting pipe 801, thereby driving the spray head 803 installed at the end of the mounting pipe 801 to complete the controllable angle adjustment within the range of 0-180°. The specific working process is as follows: When the sliding plate seat 504 rises at a constant speed from the lowest position to the highest position along the sliding track 505, the second rotating gear 703 rotates in the forward direction through the linkage of the gear and rack mechanism, and transmits power to the first conical gear 705 through the meshing teeth 704. After the second conical gear 706 reverses the direction, it drives the mounting tube 801 to perform a synchronous but slower circular motion, so that the spray direction of the spray head 803 gradually changes from the initial vertical upward (0°) state to the vertical downward (180°) state, realizing the spray coverage from top to bottom; conversely, when the sliding plate seat 504 falls back from the top of the track to the bottom, the transmission system operates in the reverse direction, pushing the spray head 803 to slowly return from the vertical downward (180°) spray posture to the vertical upward (0°), completing the spray adjustment from bottom to top. This dynamic spray angle adjustment mechanism, synchronized with the vertical movement of the sliding plate seat 504, ensures that the spray head 803 can be adjusted to the optimal spray angle in real time, regardless of the position of the sliding plate seat 504 on the track. This allows the water mist to evenly cover the entire vertical area of the inner side of the enclosure from bottom to top, effectively eliminating the problem of blind spots in traditional fixed-angle spraying, improving the spatial coverage and atomization uniformity of dust suppression operations, and thus significantly improving the dust suppression effect across the entire height range of the construction site.
[0046] As can be seen from the above, when the sliding plate seat 504 moves steadily up and down along the sliding track 505, the rack plate 602 will maintain continuous meshing contact with the first rotating gear 603, causing the first rotating gear 603 to rotate accordingly as the sliding plate seat 504 moves. The rotation of the first rotating gear 603 transmits power to the second rotating gear 703 through the connecting rod 702, which in turn drives the meshing teeth 704 to start running. Through this series of precise transmission and coordination between gears, the power is finally transmitted to the bevel gear reduction mechanism 7 composed of the first bevel teeth 705 and the second bevel teeth 706, realizing effective control of the output speed and ensuring that the second bevel teeth 706 obtains suitable low-speed stable rotation. Specifically, as the sliding plate base 504 rises at a constant speed from the bottom to the top of the sliding track 505, the installation pipe 801, connected to the second conical tooth 706, rotates in coordination. This rotation causes a precise change in the spray angle of the spray head 803 installed at the end of the installation pipe 801, gradually changing from an initial vertical upward spraying state to a vertical downward spraying state. Through the rotational adjustment mechanism that moves vertically with the sliding plate base 504, the spray head 803 can intelligently adjust its spraying direction while following the sliding plate base 504 to complete full-height reciprocating movement. This achieves all-round, no-dead-angle dynamic spray coverage of the entire facade space from the bottom to the top of the enclosure, enhancing the three-dimensionality and uniformity of dust suppression operations and effectively improving the overall dust control effect at the construction site.
[0047] All standard parts used in this invention can be purchased commercially, and irregularly shaped parts can be customized according to the description and drawings. The specific connection methods for each part all employ conventional methods such as bolts, rivets, and welding, which are mature technologies in the prior art. The machinery, parts, and equipment all use conventional models in the prior art, and the circuit connections also use conventional connection methods in the prior art, which will not be detailed here. Any content not described in detail in this specification belongs to the prior art known to those skilled in the art.
[0048] 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 described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A protective fencing structure for construction sites, characterized in that, include: Enclosure seat (1); The enclosure frame (2) is fixedly connected to the top of the enclosure base (1); A rotating mechanism (4) is installed on the outside of one side of the enclosure frame (2). The rotating mechanism (4) includes a first mounting plate (401). A working motor (402) is fixedly connected to the outside of one side of the first mounting plate (401). A rotating wheel (403) is fixedly connected to the output end of the working motor (402). A transmission belt (404) is sleeved on the outside of the rotating wheel (403). A lifting mechanism (5) is connected to the outside of the rotating mechanism (4). The lifting mechanism (5) includes a transmission wheel (501). A first hinge rod (502) is connected to the outside of the transmission wheel (501). A second hinge rod (503) is rotatably connected to the outside of the first hinge rod (502). A sliding plate seat (504) is connected to the top of the second hinge rod (503). A sliding rail (505) is inserted inside the sliding plate seat (504). The connecting mechanism (6) includes a second mounting plate (601), which is fixedly connected to the outer wall of the enclosure frame (2). A rack plate (602) is installed on the outer wall of the second mounting plate (601), and a first rotating gear (603) is meshed on the outer wall of the rack plate (602). A reduction mechanism (7) is connected to one side of the first rotating gear (603), and a spraying mechanism (8) is connected to the outside of the reduction mechanism (7). The spraying mechanism (8) includes a spray head (803) for spraying dust suppression mist.
2. The protective fencing structure for construction sites according to claim 1, characterized in that: The inner wall of the enclosure seat (1) is provided with enclosure baffles (3), and there are multiple sets of enclosure baffles (3) arranged longitudinally.
3. The protective enclosure structure for construction sites according to claim 1, characterized in that: One side of the transmission belt (404) is sleeved on the outside of the transmission wheel (501). The transmission belt (404) is used to drive the rotation of the transmission wheel (501). A groove is provided on the inner side wall of the transmission belt (404). The outer side walls of the rotating wheel (403) and the transmission wheel (501) are provided with grooves that match the inner side wall of the transmission belt (404).
4. The protective enclosure structure for construction sites according to claim 1, characterized in that: The second hinge rod (503) is mounted outside the first hinge rod (502) via a pivot, and the second hinge rod (503) is rotatably connected to the sliding plate seat (504).
5. A protective enclosure structure for construction sites according to claim 1, characterized in that: The bottom end of the first hinge rod (502) is fixedly connected to the outer wall of the transmission wheel (501) by screws. The sliding plate seat (504) is slidably connected to the outside of the sliding rail (505). The sliding rail (505) is fixedly connected to the outer wall of the second mounting plate (601).
6. A protective enclosure structure for construction sites according to claim 1, characterized in that: The rack plate (602) is vertically disposed on the outer side wall of the second mounting plate (601), and one side of the first rotating gear (603) abuts against the outside of the rack plate (602).
7. A protective enclosure structure for construction sites according to claim 1, characterized in that: The deceleration mechanism (7) includes a mounting cover (701), inside which a connecting rod (702) is installed, and a second rotating gear (703) is sleeved on the outside of the connecting rod (702). The second rotating gear (703) is meshed with meshing teeth (704) on the outside. A first conical tooth (705) is fixedly connected to one side of the meshing tooth (704), and a second conical tooth (706) is meshed on the outside of the first conical tooth (705).
8. A protective enclosure structure for construction sites according to claim 7, characterized in that: The connecting rod (702), the meshing tooth (704), and the second conical tooth (706) are all rotatably connected inside the mounting cover (701), and the first conical tooth (705) and the second conical tooth (706) are diagonally arranged.
9. A protective enclosure structure for construction sites according to claim 7, characterized in that: The spraying mechanism (8) includes an installation pipe (801), a water supply pipe (802) is installed on the outside of the installation pipe (801), and multiple spray heads (803) are provided on the outer side wall of the installation pipe (801).
10. A protective enclosure structure for construction sites according to claim 9, characterized in that: One side of the installation pipe (801) is fixedly connected to the outside of the second conical tooth (706), one end of the water supply pipe (802) is connected to the outside of the water pipe, and a plurality of spray heads (803) are arranged horizontally and evenly on the outer side wall of the installation pipe (801).