Roof snow blocking grating with snow removing function and snow removing method

Abstract

The invention relates to the technical field of roof grids, and discloses a roof snow blocking grid with a snow removal function, which comprises at least two tubular sliding rails vertically arranged on a roof in parallel, pistons which are driven by high-pressure gas to reciprocate in the length direction of the tubular sliding rails are arranged in the tubular sliding rails, hollow grids are arranged between every two adjacent tubular sliding rails, nozzles are installed on the sides, opposite to the roof, of the hollow grids, and the hollow grids are connected with the adjacent pistons through connecting plates and communicate with inner cavities of the tubular sliding rails. And high-pressure gas in the tubular sliding rail is conveyed into the hollow grating through the connecting plate. The piston in the tubular sliding rail drives the hollow grille to reciprocate along the roof, meanwhile, high-pressure gas enters the grille through the connecting plate and is sprayed out through the nozzles, the dual effects of mechanical snow pushing and airflow blowing are achieved, and the potential safety hazards that a traditional grille slides down in a snow waterfall mode and loads exceed the limit are avoided.

Description

Technical Field

[0001] This invention relates to the field of roof grid technology, specifically to a roof snow-blocking grid with snow removal function and a snow removal method. Background Technology

[0002] In snow-blocking scenarios such as industrial plants and large public buildings (such as stadiums and convention centers) with large-span sloping roofs, snow-blocking grilles are usually installed on the roof. These grilles are metal grilles installed above the eaves of the sloping roof to prevent large areas of melting snow from sliding down and causing injury to people.

[0003] Traditional roof snow barriers can only passively block snow accumulation and are ill-suited to extreme conditions such as blizzards and freeze-thaw cycles. Specific problems include: 1. Passive snow-blocking has a high risk of failure, posing significant safety hazards during blizzards. Traditional snow grates only block snow at a fixed height (usually 30-50cm). When a blizzard causes the snow to be thicker than the height of the grates, the snow will slide down the roof, forming a "snow waterfall". A large amount of snow sliding down from the eaves may injure pedestrians. In addition, long-term accumulation of snow on top of the grates will cause the grates to bear additional loads, leading to deformation, weld breakage and collapse, resulting in significant economic losses. 2. The inability to remove residual snow exacerbates structural damage due to the freeze-thaw cycle on the roof. Traditional grilles cannot actively remove snow. The snow remaining on the roof will repeatedly freeze and thaw due to the temperature difference between day and night (melting during the day and freezing at night), causing cracks in the roof waterproofing layer and corrosion of the metal roof. Cracks in the waterproofing layer and perforations in the metal roof corrosion can lead to roof leaks and damage to the interior ceiling structure, increasing maintenance costs. In addition, icicles generated by freeze-thaw cycles can hang from the eaves and can easily damage doors and windows or injure people when they fall, requiring special personnel to break the ice, which increases labor costs. 3. Relying on manual snow removal is inefficient and costly. Traditional grids cannot automatically remove snow, requiring manual snow removal through shoveling and spreading de-icing agents, which is time-consuming, labor-intensive, and inefficient. While de-icing agents (such as calcium chloride) can melt snow quickly, they can corrode roof metal components and surrounding vegetation. On roofs with a slope greater than 30°, manual snow removal also carries the risk of falling from heights.

[0004] With the increasing frequency of extreme weather events, the shortcomings of traditional snow-blocking grilles in terms of safety and economy have become the main pain points in the operation and maintenance of large-span roofs. There is an urgent need to design a roof snow-blocking grille with snow removal function and a snow removal method to solve the above problems. Summary of the Invention

[0005] To address the technical problems existing in the background art, the present invention proposes a roof snow-blocking grid with snow removal function and a snow removal method.

[0006] The present invention proposes a roof snow-blocking grid with snow removal function, comprising a tubular slide rail vertically installed on the roof, wherein there are at least two tubular slide rails arranged in parallel to each other, and a piston driven by high-pressure gas to reciprocate along the length of the tubular slide rail is provided inside the tubular slide rail. A hollow grid is provided between two adjacent tubular slide rails, and a nozzle is installed on the side of the hollow grid opposite to the roof. The hollow grid is connected to the adjacent piston through a connecting plate and communicates with the inner cavity of the tubular slide rail. The high-pressure gas in the tubular slide rail is transmitted to the hollow grid through the connecting plate and sprayed out by the nozzle to blow away the snow on the roof. The roof surface is fitted with roof bases located below both ends of each tubular slide rail. Fixed bases are installed on the lower surfaces of both ends of the tubular slide rail, and the fixed bases are connected to the roof bases by bolts. Addressing the issues of traditional roof snow-blocking grilles being only passively blocking snow and prone to failure in blizzards, this device achieves active snow removal through "high-pressure gas drive + active blowing." The tubular slide rails are distributed in parallel, and the piston drives the hollow grille to reciprocate under the drive of high-pressure gas. At the same time, the high-pressure gas enters the hollow grille through the connecting plate and is sprayed out through the nozzle, forming a dual effect of "mechanical snow pushing + airflow blowing," achieving a snow removal efficiency of over 90%. The bolted connection between the fixed base and the roof base ensures that the device is stable in environments ranging from -30℃ to 50℃, making it suitable for pitched roofs, irregularly shaped roofs, and other scenarios.

[0007] As a further optimization of the present invention, the outer wall of the tubular slide rail is provided with a slide groove arranged along its length direction. The slide groove is connected to the inner cavity of the tubular slide rail, and the end of the connecting plate away from the hollow grid extends into the slide groove and is fixedly connected to the piston. When the air pressure is high enough, although the high-pressure gas will leak out from the slide groove, it will not affect the piston sliding along the inner cavity of the tubular slide rail. The tubular slide rail has grooves on its upper surface and sides, and each groove is equipped with a connecting plate that is connected to the piston. The connecting plate on the side is connected to the side of the adjacent hollow grid, and the connecting plate on the upper surface is bent laterally and connected to the upper end of the hollow grid. The chute provides a moving channel for the connecting plate, and the connecting plate on the side and the upper surface forms a support, which enhances the rigidity of the hollow grid. The high-pressure gas leakage is ≤5%, which does not affect the piston driving force and ensures that the grid reciprocating motion is smooth. The horizontally bent connecting plate enables the hollow grid to also have a snow-blocking function, which can prevent snow from sliding down when not clearing snow.

[0008] As a further optimization of the present invention, it also includes a high-pressure air charging pipeline arranged in a ring around the periphery of multiple tubular slide rails. The high-pressure air charging pipeline has an air inlet connected to the air outlet of an air compressor. One-way pneumatic valves are installed at both ends of the tubular slide rails, and the outlet ends of the two one-way pneumatic valves face the inside of the tubular slide rails. The annular high-pressure air supply line enables full-area air supply, and the one-way pneumatic valve controls the gas flow direction to ensure the reciprocating motion of the piston: when the upper valve is open, the gas pushes the piston to move to the lower end, and vice versa. This design eliminates the need for a reverse motor, simplifies the structure, reduces the failure rate, and the air compressor provides a continuous air source.

[0009] As a further optimization of the present invention, there are three tubular slide rails arranged on the left, center and right sides of the roof slope. The high-pressure air-filled pipeline is rectangular and arranged around the periphery of the three tubular slide rails. The short side of the high-pressure air-filled pipeline is opposite to the end of the tubular slide rail and is connected to it through a branch pipe. A one-way pneumatic valve is installed on the branch pipe. The air inlet of the high-pressure air-filled pipeline extends to the outside of the roof and is connected to an air compressor. Three tubular slide rails are arranged in layers along the roof slope to achieve layered snow removal from the top to the eaves, preventing snow from sliding down and accumulating. The branch pipes of the rectangular high-pressure air inlet connect to the ends of the slide rails, and the one-way pneumatic valve precisely controls the airflow of each layer to adapt to different snow thicknesses. The air inlet extends to the outside of the roof to facilitate compressor installation and maintenance.

[0010] As a further optimization of the present invention, it also includes an air compressor control box, a signal controller, a signal transmission line, and a snow thickness sensor installed on the roof. The signal transmission line is electrically connected to the one-way pneumatic valve, the snow thickness sensor, the air compressor control box, and the signal controller to form a signal transmission feedback channel. The snow thickness sensor transmits the snow thickness signal on the roof to the signal controller. The signal controller generates start and stop signals based on the snow thickness signal and transmits them to the air compressor control box. The air compressor control box controls the start and stop of the air compressor and the opening of the corresponding one-way pneumatic valve, so that the piston drives the hollow grid to reciprocate on the roof. The snow thickness sensor monitors the snow thickness in real time. When the snow thickness exceeds the preset threshold, the signal controller triggers the air compressor to start and controls the one-way pneumatic valve to switch directions, thus achieving fully automatic snow removal. The signal transmission line uses cold-resistant cable to ensure stable low-temperature signal, reduce feedback delay, and significantly improve the response speed compared to manual inspection.

[0011] As a further optimization of the present invention, there are multiple snow thickness sensors, which are evenly distributed circumferentially on the inner side of the high-pressure air filling pipeline and located on the outer periphery of the tubular slide rail. Multiple sensors are located around the slide rail, which does not affect the movement of the grid. The data is processed by a weighted algorithm to ensure the accuracy of snow thickness judgment.

[0012] As a further optimization of the present invention, the snow thickness sensor is an ultrasonic snow depth sensor with the probe facing the roof. The snow thickness sensor is mounted on the outer wall of the tubular slide rail by a bracket and is designed to be offset from the movement path of the piston. The ultrasonic sensor probe is positioned vertically downwards to avoid interference from direct sunlight. The bracket keeps the sensor at a distance from the roof, and the offset design prevents piston collisions, ensuring long-term stable operation.

[0013] As a further optimization of the present invention, the hollow grid is a rectangular grid formed by welding multiple interconnected pipes, and the number of nozzles is multiple and evenly distributed along the length direction of the bottom of the rectangular grid and parallel to the roof. The rectangular grid is welded from Φmm steel pipes, with internal interconnections to ensure uniform air pressure. The nozzles are evenly distributed along the bottom and blow parallel to the roof surface, which can remove thin ice (at -5℃) and snow. The blowing width is ≥200mm / grid, covering no dead corners.

[0014] As a further optimization of the present invention, the end of the connecting plate connected to the piston has two bifurcated pipes, which extend to both sides of the piston respectively, so as to fill the tubular slide rail with air from two directions to push the piston and the hollow grid to move, while not affecting the high-pressure gas entering the hollow grid through the bifurcated pipes. The bifurcated pipes are symmetrically distributed on both sides of the piston to ensure balanced force during bidirectional inflation and prevent piston jamming. The bifurcated pipes are connected to the hollow grid, with a gas transmission efficiency of ≥90%. They drive the piston and supply gas to the nozzle, achieving "one source for two uses" and simplifying pipeline design.

[0015] A snow removal method using the aforementioned roof snow-blocking grille with snow removal function, the specific steps of which are as follows: S1: The snow thickness sensor monitors the snow thickness on the roof in real time and sends the real-time snow thickness signal to the signal controller; S2: The signal controller sends start / stop signals to the one-way pneumatic valve and air compressor control box based on real-time snow thickness information; S3: When the air compressor control box receives the start signal from the signal controller, it starts the air compressor to charge high-pressure gas into the air inlet of the high-pressure charging pipeline. At the same time, the one-way pneumatic valves at the upper end of multiple tubular slide rails open, and the high-pressure gas enters through the upper end of the tubular slide rails and pushes the piston and hollow grid to move to the lower end of the tubular slide rails. The high-pressure gas in the tubular slide rails enters the hollow grid through the connecting plate and is sprayed out through the nozzles to blow away the snow on the roof surface under high pressure. S4: When the piston moves close to the lower end of the tubular slide rail, the one-way pneumatic valve at the upper end closes and the one-way pneumatic valve at the lower end opens. The high-pressure gas in the high-pressure inflation line enters the tubular slide rail through the one-way pneumatic valve at the lower end and pushes the piston and hollow grid to move towards the upper end of the tubular slide rail. The high-pressure gas in the tubular slide rail enters the hollow grid through the connecting plate and is sprayed outward from the nozzle to blow away the snow on the roof surface under high pressure. S5: When the air compressor control box receives a stop signal from the signal controller, the air compressor is shut down.

[0016] The roof snow-blocking grille and snow removal method with snow removal function proposed in this invention have the following beneficial effects: (i) Combining active snow removal with passive snow blocking breaks through the limitations of traditional protection. The hollow grid moves back and forth along the roof by a piston inside the tubular slide rail. At the same time, high-pressure gas enters the grid through the connecting plate and is sprayed out by the nozzle, forming a dual effect of "mechanical snow pushing + airflow blowing". Actual tests show that the structure can achieve a snow removal rate of 92% within 30 minutes under the condition of snowfall of 10cm / h. Even if the snow thickness exceeds the height of the grid, it can be quickly cleared, solving the safety hazards of traditional grid "snow waterfall" sliding and overload. 2. Intelligent sensing and automatic control improve the timeliness and accuracy of snow removal. Multiple ultrasonic snow thickness sensors monitor snow accumulation in the circumference, and the signal controller automatically triggers snow removal according to a preset threshold. The system can identify thin ice and remove it through pulse blowing and vibration. The response time is short, and the efficiency is greatly improved compared to manual inspection. This avoids the difficulty of removing snow after it freezes and reduces the risk of manual high-altitude operations. 3. Layered coverage and full-area purging, adaptable to complex roof shapes. Three tubular slide rails are distributed along the left, center and right sides of the roof slope, forming a layered snow removal system with rectangular high-pressure air-filled pipes. The system advances gradually from the top to the eaves, preventing snow from sliding down and accumulating. The rectangular structure of the hollow grid and the evenly distributed nozzles ensure that there are no dead corners in the blowing. It is suitable for large-span sloping roofs such as industrial plants and stadiums, and its snow removal efficiency is greatly improved compared to traditional single-point snow removal. 4. High-pressure gas can be used for two purposes in one source, simplifying the structure and reducing costs. High-pressure gas drives the piston to move the grid and also blows directly through the nozzles without the need for an additional power source. The equipment is highly integrated, and the bifurcated pipe design of the connecting plate ensures balanced force when supplying air in both directions. The one-way pneumatic valve precisely controls the airflow direction and has a low failure rate. Compared with traditional mechanical snow removal devices, energy consumption is greatly reduced, and no de-icing agent is needed, avoiding corrosion of metal roofs and damage to vegetation. 5. Adaptability to extreme environments and structural durability extend roof life. This snow-blocking grille can work stably in environments ranging from -30℃ to 50℃. The sealed design of the tubular slide rail and piston ensures airtightness at low temperatures. After snow removal, the residual snow on the roof is ≤3cm, and the number of freeze-thaw cycles is reduced from 50 times per year to less than 20 times. This significantly reduces cracking of the waterproof layer and metal corrosion, and greatly reduces roof maintenance costs. At the same time, the grille still has the function of blocking snow when not in snow removal mode, taking into account both protection and snow removal needs.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 A top view of the roof snow-blocking grille with snow removal function provided by the present invention; Figure 2 This is a front cross-sectional view of the tubular slide rail of the roof snow-blocking grid with snow removal function provided by the present invention. Figure 3 This is a schematic diagram illustrating the control principle of the roof snow-blocking grille with snow removal function provided by the present invention.

[0019] Figure descriptions: 1. Tubular slide rail; 2. Piston; 3. Connecting plate; 4. Fixed base; 5. Hollow grid; 6. Nozzle; 7. Roof; 8. Roof base; 9. One-way pneumatic valve; 10. Snow thickness sensor; 11. Air compressor control box; 12. Air compressor; 13. Signal controller; 14. High-pressure air filling pipeline; 15. Signal transmission line. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols 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 the present invention, and should not be construed as limiting the present invention.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0022] Please see Figures 1-3 A roof snow-blocking grille with snow removal function is mainly designed to address the problems of traditional grilles passively blocking snow and easily failing in heavy snow. It innovatively adopts a "high-pressure gas drive + intelligent sensing + dual snow removal" design to achieve the integration of active snow removal and passive protection. The device consists of four parts: a tubular slide rail system, a hollow grille assembly, a high-pressure air circuit network and an intelligent control system. The grille is driven to reciprocate by high-pressure gas, which works in conjunction with airflow to blow away accumulated snow. It also has automatic monitoring and adaptive adjustment functions and is suitable for extreme environments from -30℃ to 50℃. Layered arrangement: Three tubular sliding rails are distributed along the left, center and right sides of the roof slope, covering the entire roof surface to ensure that snow removal is thorough and without blind spots; Bidirectional drive: High-pressure gas alternately enters both ends of the slide rail through a one-way pneumatic valve, pushing the piston to drive the hollow grid to reciprocate (the stroke matches the roof length). Air-solid synergy: While the grid mechanically pushes snow, high-pressure gas is sprayed out from the nozzle through the built-in pipeline to blow away residual snow and thin ice (can break 5mm thin ice below -5℃). Intelligent closed loop: The snow thickness sensor provides real-time data feedback, and the signal controller automatically starts and stops the equipment and adjusts the blowing intensity to achieve unattended operation; Actual tests showed that the device achieved a snow removal rate of 92% within 30 minutes under a snowfall rate of 10 cm / h, which is 20 times more efficient than traditional manual snow removal.

[0023] Specifically, the tubular slide rail and piston drive system Tubular slide rail 1: Seamless steel pipes are used, and the length can be spliced ​​and extended. Three pipes are arranged in parallel along the roof slope. T-shaped grooves are opened on the outer wall of the slide rail. 5mm thick wear-resistant steel plates are welded on both sides of the groove to reduce the sliding wear of the connecting plate. Flanges are welded to both ends of the slide rail and connected to the fixed base 4 by bolts. Piston 2 and sealing design: The piston has a combined structure: the outer layer is a polyurethane sealing ring, and the inner part is a No. 45 steel skeleton to ensure a tight fit with the inner wall of the slide rail. The airtightness test shows that under a pressure of 0.8MPa, the pressure drop is ≤0.03MPa after 30 minutes. Guide rings (made of polytetrafluoroethylene) are installed at both ends of the piston to reduce the coefficient of friction to 0.15 and ensure smooth movement. Connecting plate 3: It is made of seamless steel pipe welding, with one end fixed to the piston by bolts and branched into two branches. The ends of the branches extend to both sides of the piston 2. The branch design ensures balanced force during bidirectional inflation, avoids piston jamming, and has a gas transmission efficiency of ≥90%.

[0024] Specifically, hollow grille and purging system Hollow grille 5: The main body is a rectangular frame, which is formed by welding steel pipes to create a grid structure; Nozzle 6: It uses flat brass nozzles with a spray angle of 80°. One nozzle is arranged every 150mm along the bottom of the grid. The nozzles are installed parallel to the roof (50mm away from the roof). Under a pressure of 0.7MPa, the spray velocity is 35m / s and the blowing width is 250mm. It can remove soft snow and thin ice with a thickness of ≤10cm.

[0025] Specifically, the high-pressure gas circuit and control system High-pressure inflation line 14: The main pipeline is made of galvanized steel pipe, which is rectangular and surrounds the three tubular slide rails. The short side is connected to the end of the slide rail through a branch pipe. A one-way pneumatic valve 9 (model 4V210-08, working pressure 0.15-0.8MPa, response time ≤0.3s) is installed on the branch pipe to ensure that gas enters the slide rail in one direction. The pipeline support is made of angle steel and is fixed to the roof every 1.5m. Elbows are installed at the bends to reduce pressure loss. Air compressor 12: A stationary screw air compressor is selected and installed in the equipment room under the roof. It is connected to the air supply line through a high-pressure rubber hose. Quick connectors are provided at both ends of the hose for easy disassembly and assembly. A three-stage filter is installed at the air inlet of the compressor to prevent impurities from entering the air line. Intelligent control components: Snow thickness sensor 10: 6 ultrasonic sensors (model HY-SRF05) are evenly distributed around the inside of the inflation line, with the probes pointing vertically downwards and offset from the piston movement path to prevent collision; Signal controller 13: adopts Siemens S7-1214CPLC, equipped with 16-point digital input / output module, built-in snow removal logic program, and can set start threshold (e.g. 10cm), stop threshold (e.g. 3cm), and reciprocating number (adjustable from 1 to 5 times).

[0026] Air compressor control box 11: Includes Schneider frequency converter (ATV310), which can adjust the compressor speed (300-1500rpm) via 0-10V signal to achieve stepless pressure regulation. The box is equipped with a temperature relay (heating starts at -30℃) to ensure low temperature start-up. Signal transmission line 15: RVVP-4×0.75 cold-resistant shielded cable (operating temperature -40℃ to 70℃) is used, laid along the roof support, protected by PVC pipe, and the joints are waterproofed. The transmission delay is ≤100ms.

[0027] Specifically, fixing and installation structure Fixed base 4 and roof base 8: The fixed base is made of steel plate and welded to the bottom of both ends of the tubular slide rail. Four mounting holes are opened. The roof base and the fixed base are connected by bolts and nuts. A 5mm thick neoprene rubber pad is placed at the bottom for shock absorption. The tubular slide rail is equipped with buffer blocks at both ends to prevent the piston from hitting the end. Pressure gauges are installed every 5 meters along high-pressure pipelines to facilitate monitoring of pressure distribution.

[0028] Specifically, the automatic snow removal process is as follows: Step 1: Initialization and Monitoring After the system is powered on, the snow thickness sensor 10 starts real-time monitoring (sampling frequency 1Hz). The data is sent to the signal controller 13 via the signal transmission line 15. The controller performs a weighted average of the data from the 6 sensors and removes outliers. When the average snow thickness is ≥10cm, the snow removal program is triggered. Step 2: Air circuit start-up and forward purging The signal controller 13 sends a start signal to the air compressor control box 11, the compressor starts, and at the same time opens the one-way pneumatic valve 9 at the upper end of the three tubular slide rails. High-pressure gas enters the slide rail through the branch pipe, pushing the piston 2 to drive the hollow grid 5 to move downward at a speed of 0.8m / s. While the grid mechanically pushes the snow, the gas enters the grid through the connecting plate 3 and is sprayed out by the nozzle 6 to blow away the residual snow. Step 3: Reverse purging and circulation When the piston moves to 500mm from the lower end of the slide rail (proximity switch triggered), the upper pneumatic valve closes and the lower pneumatic valve opens. The gas pushes the piston to move in the opposite direction, completing the second purging. Depending on the snow thickness, the system can automatically cycle 1-3 times to ensure thorough snow removal. Step 4: Shutdown and Reset When the average snow depth is ≤3cm, the signal controller sends a stop signal, the air compressor shuts down, the pneumatic valve resets, the piston drives the grille back to its initial position (near the eaves), the system enters standby mode, and the grille resumes its snow-blocking function.

[0029] It should be noted that when encountering extreme weather, if the snow depth increases by ≥5cm within 10 minutes, the system will automatically switch to "enhanced mode", increasing the compressor pressure by 20%, increasing the number of cycles by 1-2, and extending the nozzle purging time by 50%. When the sensor detects ice under the snow (judged by the rate of change of temperature and thickness), the "pulse purging" is activated (intermittent jetting from the nozzle at a frequency of 2Hz), using airflow vibration to break up the ice layer; In summary, this snow-blocking grille can be widely used in large-span pitched roofs of industrial plants, logistics warehouses, stadiums, etc., and is especially suitable for northern regions with snowfall ≥500mm / year. It is compatible with various roofing materials such as asphalt shingles and metal panels. Through modular design, it can be flexibly combined, and can be directly integrated into new projects. Existing building renovations do not require damage to the roof structure, providing an efficient, intelligent, and environmentally friendly solution for roof snow removal.

[0030] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A roof snow-blocking grille with snow removal function, characterized in that, The system includes a tubular slide rail (1) installed vertically on the roof (7). There are at least two tubular slide rails (1) arranged in parallel to each other. Inside the tubular slide rail (1) is a piston (2) that is driven by high-pressure gas to reciprocate along the length of the tubular slide rail (1). A hollow grid (5) is provided between two adjacent tubular slide rails (1). A nozzle (6) is installed on the side of the hollow grid (5) opposite to the roof (7). The hollow grid (5) is connected to the adjacent piston (2) through a connecting plate (3) and communicates with the inner cavity of the tubular slide rail (1). The high-pressure gas in the tubular slide rail (1) is transmitted to the hollow grid (5) through the connecting plate (3) and sprayed out by the nozzle (6) to blow away the snow on the roof (7).

2. A roof snow-blocking grille with snow removal function according to claim 1, characterized in that, The outer wall of the tubular slide rail (1) is provided with a slide groove arranged along its length. The slide groove is connected to the inner cavity of the tubular slide rail (1). The end of the connecting plate (3) away from the hollow grid (5) extends into the slide groove and is fixedly connected to the piston (2).

3. A roof snow-blocking grille with snow removal function according to claim 1, characterized in that, It also includes a high-pressure air supply line (14) arranged in a ring around multiple tubular slide rails (1). The high-pressure air supply line (14) has an air inlet connected to the air outlet of the air compressor (12). Both ends of the tubular slide rail (1) are equipped with one-way pneumatic valves (9), and the outlet ends of the two one-way pneumatic valves (9) face the inside of the tubular slide rail (1).

4. A roof snow-blocking grille with snow removal function according to claim 3, characterized in that, There are three tubular slide rails (1) and they are arranged on the left, center and right sides of the slope of the roof (7). The high-pressure air-filled pipe (14) is rectangular and is arranged around the periphery of the three tubular slide rails (1). The short side of the high-pressure air-filled pipe (14) is opposite to the end of the tubular slide rail (1) and is connected through a branch pipe. The one-way pneumatic valve (9) is installed on the branch pipe. The air inlet of the high-pressure air-filled pipe (14) extends to the outside of the roof (7) and is connected to the air compressor (12).

5. A roof snow-blocking grille with snow removal function according to claim 3, characterized in that, It also includes an air compressor control box (11), a signal controller (13), and a signal transmission line (15), as well as a snow thickness sensor (10) installed on the roof (7) and a signal transmission line (15). The (15) is electrically connected to the one-way pneumatic valve (9), the snow thickness sensor (10), the air compressor control box (11), and the signal controller (13) to form a signal transmission feedback channel. The snow thickness signal on the roof (7) is transmitted to the signal controller (13) through the snow thickness sensor (10). The signal controller (13) generates start and stop signals based on the snow thickness signal and transmits them to the air compressor control box (11). The air compressor control box (11) controls the start and stop of the air compressor (12) and the opening of the corresponding one-way pneumatic valve (9), so that the piston (2) drives the hollow grid (5) to reciprocate on the roof (7).

6. A roof snow-blocking grille with snow removal function according to claim 5, characterized in that, There are multiple snow thickness sensors (10), which are evenly distributed around the inside of the high-pressure air-filling pipeline (14) and located on the periphery of the tubular slide rail (1).

7. A roof snow-blocking grille with snow removal function according to claim 5, characterized in that, The snow thickness sensor (10) is an ultrasonic snow depth sensor with the probe facing the roof (7). The snow thickness sensor (10) is mounted on the outer wall of the tubular slide rail (1) by a bracket and is designed to be offset from the moving path of the piston (2).

8. A roof snow-blocking grille with snow removal function according to claim 1, characterized in that, The hollow grid (5) is a rectangular grid made of multiple interconnected pipes welded together. The number of nozzles (6) is multiple and they are evenly distributed along the bottom length of the rectangular grid and parallel to the roof (7).

9. A roof snow-blocking grille with snow removal function according to claim 1, characterized in that, The connecting plate (3) has two bifurcated tubes at one end connected to the piston (2). The two bifurcated tubes extend to both sides of the piston (2) so that air can be injected into the tubular slide rail (1) from two directions to push the piston (2) and the hollow grid (5) to move, while not affecting the high-pressure gas entering the hollow grid (5) through the bifurcated tubes.

10. A snow removal method, using a roof snow-blocking grille with snow removal function as described in any one of claims 1-9, characterized in that the specific steps are as follows: S1 snow thickness sensor (10) monitors the snow thickness on the roof (7) in real time and sends the real-time snow thickness signal to the signal controller (13). The S2 signal controller (13) sends start / stop signals to the one-way pneumatic valve (9) and the air compressor control box (11) based on the real-time snow thickness information. When the air compressor control box (11) receives the start signal from the signal controller (13), the air compressor (12) starts to fill the air inlet of the high-pressure charging pipeline (14) with high-pressure gas. At the same time, the one-way pneumatic valves (9) at the upper end of the multiple tubular slide rails (1) open. The high-pressure gas enters through the upper end of the tubular slide rail (1) and pushes the piston (2) and the hollow grid (5) to move to the lower end of the tubular slide rail (1). The high-pressure gas in the tubular slide rail (1) enters the hollow grid (5) through the connecting plate (3) and is sprayed out by the nozzle (6) to blow the snow on the roof (7) surface under high pressure. When piston (2) moves to the lower end of tubular slide rail (1), the one-way pneumatic valve (9) at the upper end closes and the one-way pneumatic valve (9) at the lower end opens. The high-pressure gas in the high-pressure inflation pipeline (14) enters the tubular slide rail (1) through the one-way pneumatic valve (9) at the lower end and pushes piston (2) and hollow grid (5) to the upper end of tubular slide rail (1). The high-pressure gas in tubular slide rail (1) enters the hollow grid (5) through connecting plate (3) and is sprayed outward by nozzle (6) to blow away the snow on the roof (7) surface under high pressure. S5 When the air compressor control box (11) receives a stop signal from the signal controller (13), the air compressor (12) is shut down.

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