Fabricated light steel farm house

Abstract

This invention relates to the field of prefabricated building technology, and more particularly to a prefabricated light steel farmhouse, comprising a light steel farmhouse body, which includes walls and two roof surfaces fixed to the upper part of the walls, both of which are sloping. The light steel farmhouse body also includes an installation plate, a cover plate, a counterweight mechanism, a vibration mechanism that causes the installation plate to vibrate intermittently in its sliding direction, and a triggering mechanism connected between the vibration mechanism and a limiting mechanism. Through the vibration mechanism, in typical light snowfall, snowflakes, after being heated by a periodic heating plate, automatically slide down and land on a receiving plate. This causes the receiving plate to slide down and pulls the installation plate downwards via a rope. After the snowflakes land above the receiving plate, they are bounced off by the vibration plate. Under the elastic force of a first spring, the installation plate quickly moves upwards, producing a vibration effect, thereby automatically shaking off the snow accumulated on the photovoltaic panel.

Description

Technical Field

[0001] This invention relates to the field of prefabricated building technology, and in particular to a prefabricated light steel farmhouse. Background Technology

[0002] Research and promotion of key technologies for prefabricated rural housing construction will improve the comfort and safety of rural houses, increase construction efficiency and reduce construction costs, while also improving rural livability and accelerating the construction of beautiful villages. Furthermore, it will promote the application of green technologies and building materials in rural areas, and contribute to regional air pollution control, industrial restructuring, and economic transformation and upgrading. This is of great significance in continuously enhancing farmers' sense of gain, happiness, and security.

[0003] In order to comply with the concept of energy conservation and environmental protection, many existing prefabricated farmhouses are equipped with photovoltaic panels. The photovoltaic panels receive sunlight and convert solar energy into electricity for daily use, which can greatly save electricity.

[0004] In the existing technology, since photovoltaic panels are exposed on the roof without a protective structure, they are easily damaged by heavy snow accumulation. To prevent this, manual shielding or snow removal is required. However, if not handled promptly, there is still a risk of the photovoltaic panels being damaged. Therefore, the purpose of this invention is to provide a prefabricated light steel farmhouse that can automatically protect photovoltaic panels in heavy snow to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to propose a prefabricated light steel farmhouse to solve the problem that the photovoltaic panels on the roof of the prefabricated green farmhouse are exposed and lack a protective structure, and that the photovoltaic panels are easily damaged by heavy snow accumulation in heavy snow.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a prefabricated light steel farmhouse, comprising a light steel farmhouse body, wherein the light steel farmhouse body includes walls and two roof surfaces fixed to the upper end of the walls and having sloping sides, and the light steel farmhouse body further includes:

[0007] The mounting plate is fixedly mounted with photovoltaic panels, and the mounting plate is slidably positioned on the roof surface near the lower part.

[0008] The cover plate is slidably installed on the roof surface near the upper part;

[0009] The counterweight mechanism is connected to one end of the cover plate near the roof surface and is mounted on the wall via a limiting mechanism.

[0010] A vibration mechanism that causes the mounting plate to vibrate intermittently in its sliding direction includes a periodic heating plate fixed at the lowest position of the roof surface, a groove provided on the surface of the wall, a receiving plate slidably disposed in the groove, the receiving plate being located below the periodic heating plate, a pull rope connecting the receiving plate and the mounting plate, and a first spring connecting the mounting plate and the roof surface.

[0011] A triggering mechanism connecting the vibration mechanism and the limit mechanism;

[0012] The counterweight mechanism includes a steel rope fixedly connected to the cover plate, a counterweight block connected to the steel rope, a first slide rail fixed to the wall, and the counterweight block and the first slide rail slidably connected.

[0013] The limiting mechanism includes a copper sleeve fixed in the first slide rail, a spring pin inside the copper sleeve, and a fixing groove on the side of the counterweight that cooperates with the spring pin.

[0014] The triggering mechanism includes an electromagnet fixed to the end of the copper sleeve away from the counterweight. A trigger switch is provided on the surface of the wall below the receiving plate. The trigger switch and the electromagnet are electrically connected by a wire. The spring pin and the copper sleeve are slidably connected, and a third spring is connected to the end of the spring pin and the copper sleeve away from the counterweight.

[0015] Preferably, the roof surface is provided with a guide mechanism for guiding the sliding of the cover plate. The guide mechanism includes two second slide rails fixed on both sides of the roof surface. The second slide rails are provided with a vibration mechanism. The vibration mechanism includes sliding blocks slidably disposed on both sides of the bottom of the cover plate. A second spring is connected between the sliding blocks and the cover plate. The sliding blocks are equipped with pulleys. The inner side of the second slide rail is provided with an S-shaped guide groove. The pulleys are rolled in the S-shaped guide groove.

[0016] Preferably, bells are installed on both sides of the cover plate.

[0017] Preferably, the upper end of the cover plate is provided with a collection trough for collecting snow. The collection trough has an opening on one side located below the roof surface. A baffle is rotatably provided inside the opening. A gear is fixed to the rotating shaft of the baffle. A stop block is fixed at the lowest position of the roof surface. A rack corresponding to the gear is fixed to the stop block.

[0018] Preferably, a shaking plate is connected to the surface of the receiving plate by a fourth spring, and the shaking plate is inclinedly disposed on the surface of the receiving plate.

[0019] Preferably, the spring pin includes a base, a locking block, and a fifth spring. The base is slidably disposed inside the copper sleeve near the counterweight, and a third spring is connected to the end of the base and the copper sleeve away from the counterweight. The end of the base near the counterweight has a groove, and the locking block is slidably disposed in the groove. The fifth spring is connected between the groove and the locking block. The head of the locking block has beveled sides, and the shape of the fixing groove matches the shape of the head of the locking block.

[0020] Preferably, a guide groove is embedded in the inner side of the second slide rail, and a limiting plate is fixedly provided on the side of the cover plate, the limiting plate being slidably limited in the guide groove.

[0021] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0022] 1. This invention, through the setting of a vibration mechanism, allows snowflakes to automatically slide down and land on the receiving plate after being heated by the periodic heating plate in normal light snow weather. This causes the receiving plate to slide down and pull the mounting plate downwards via a pull rope. After the snowflakes land above the receiving plate, they are bounced off by the shaking plate. Under the elastic force of the first spring, the mounting plate moves upwards rapidly, producing a vibration effect. This automatically shakes off the snow accumulated on the surface of the photovoltaic panel, preventing the photovoltaic panel from being damaged.

[0023] 2. When the snowfall is heavy, the snow chunks falling on the receiving plate will become larger within the same time frame, causing the receiving plate to move downwards a greater distance and contact the trigger switch. This activates the electromagnet, generating magnetic force that attracts the spring pin to move backwards. When enough snow is collected in the collection groove above the cover plate, the spring pin's locking block automatically disengages from the side of the counterweight, causing the cover plate to slide downwards and cover the photovoltaic panel, thus providing protection.

[0024] 3. The present invention also includes a vibration mechanism in the guide mechanism. As the cover slides down, it sways left and right under the action of the vibration mechanism, which shakes away the snow on the surface. At the same time as it sways, it will cause the bell to ring, reminding pedestrians to get out of the way.

[0025] 4. The cover plate of the present invention is provided with a collection groove on the top to facilitate the collection of snowflakes. The weight of the snowflakes can be used to drive the cover plate to move. A baffle is provided at the opening on one side of the collection groove. When the cover plate slides down, the rack of the stop block will first mesh with the gear, push the gear to rotate, thereby driving the baffle to rotate down and open. Then, the cover plate slides down and hits the stop block, so that the snow in the collection groove can be automatically thrown out through the opening, reducing the weight on the top of the cover plate. Attached Figure Description

[0026] Figure 1 A schematic diagram of the structure of the present invention when the cover plate is placed on the mounting plate is shown.

[0027] Figure 2 A partial structural schematic diagram of the present invention is shown.

[0028] Figure 3 A three-dimensional structural schematic diagram of the present invention is shown.

[0029] Figure 4 A schematic diagram of the limiting mechanism structure of the present invention is shown.

[0030] Figure 5 A schematic diagram of the installation structure of the cover plate of the present invention is shown.

[0031] Figure 6 A schematic diagram of the spring pin of the present invention is shown.

[0032] Legend: 10. Light steel farmhouse body; 11. Wall; 12. Roof; 20. Mounting plate; 30. Cover plate; 301. Limiting plate; 31. Collection trough; 32. Baffle; 33. Gear; 34. Photovoltaic panel; 40. Counterweight mechanism; 41. Steel rope; 42. Counterweight block; 43. First slide rail; 50. Limiting mechanism; 51. Copper sleeve; 52. Spring pin; 521. Base; 522. Locking block; 523. Fifth spring; 53. Third spring; 60. Vibration Vibration mechanism; 61. Periodic heating plate; 62. Receiving plate; 63. Pull rope; 64. First spring; 65. Fourth spring; 66. Shaking plate; 70. Triggering mechanism; 71. Electromagnet; 72. Trigger switch; 73. Wire; 80. Guide mechanism; 81. Second slide rail; 810. Guide groove; 90. Vibration mechanism; 91. Sliding block; 92. Second spring; 93. Pulley; 94. S-shaped guide groove; 95. Bell; 100. Stop block; 101. Rack. Detailed Implementation

[0033] 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.

[0034] Please see the appendix Figure 1-6 The following is in conjunction with the appendix Figure 1-6 This invention provides a detailed description of a prefabricated light steel farmhouse.

[0035] A prefabricated light steel farmhouse includes a light steel farmhouse body 10, which is entirely constructed of light steel materials. The light steel farmhouse body 10 includes walls 11 and two roof surfaces 12 fixed to the upper part of the walls 11, both of which are sloping. The light steel farmhouse body 10 also includes:

[0036] Mounting plate 20, on which photovoltaic panel 34 is fixedly installed, receives solar energy and converts it into electrical energy for the daily use of residents, which is energy-saving and environmentally friendly. It is slidably set on the surface of the roof 12 near the lower part.

[0037] The cover plate 30 is slidably disposed on the surface of the roof 12 near the upper part. When the snow is heavy, the photovoltaic panels 34 on the mounting plate 20 are easily damaged by the snow. By sliding the cover plate 30 to the bottom of the roof 12, it can completely cover the upper part of the mounting plate 20, protect the photovoltaic panels 34 and prevent the snow from damaging the photovoltaic panels 34.

[0038] The counterweight mechanism 40 is connected to one end of the cover plate 30 near the upper part of the roof surface 12, and is set on the wall 11 by the limiting mechanism 50. Under normal circumstances, due to the limitation of the limiting mechanism 50, the gravity of the counterweight mechanism 40 keeps the cover plate 30 fixed at the top of the roof surface 12 near the top.

[0039] A vibration mechanism 60 causes the mounting plate 20 to vibrate intermittently in its sliding direction. This vibration mechanism 60 causes the mounting plate 20 to vibrate periodically, causing the photovoltaic panel 34 to vibrate and shake off snow from its surface. In this embodiment, the vibration mechanism 60 includes a periodic heating plate 61 fixed to the lowest position of the roof surface 12. The surface of the wall 11 is provided with a groove, and a receiving plate 62 slides within the groove. The receiving plate 62 is located below the periodic heating plate 61. It should be noted that both the periodic heating plate 61 and the outer sides of the receiving plate 62 are inclined downwards, with the receiving plate 62 having a greater inclination. A pull rope 63 connects the receiving plate 62 to the mounting plate 20, and a first spring 64 connects the mounting plate 20 to the roof surface 12. When it snows, the... When the user connects to the external power supply of the periodic heating plate 61, the periodic heating plate 61 can intermittently heat the snow on its surface according to the program settings (periodic heating of electric heating plates is existing technology and will not be described in detail here). Snowflakes fall on the surface of the periodic heating plate 61 and accumulate to form snow blocks. When the periodic heating plate 61 is heated, the bottom of the accumulated snow blocks will melt, so that the accumulated snow blocks will automatically slide down under the action of gravity and fall onto the surface of the receiving plate 62. The receiving plate 62 will slide down when it is hit by the falling snow blocks. When sliding, the installation plate 20 is pulled down towards the roof surface 12 by the pull rope 63. When the installation plate 20 slides down, it compresses the first spring 64. After the snow blocks come into contact with the receiving plate 62, they will automatically slide down. Under the elastic force of the first spring 64, the installation plate 20 will automatically slide up and reset, realizing one vibration.

[0040] The triggering mechanism 70 connects the vibration mechanism 60 and the limiting mechanism 50. When the receiving plate 62 slides downward in the groove and contacts the triggering mechanism 70, the triggering mechanism 70 releases the limitation mechanism 50 from restricting the counterweight mechanism 40. As mentioned above, when it snows, snowflakes fall on the periodic heating plate 61 and form snow blocks. After being heated, they automatically slide onto the surface of the receiving plate 62. The movement of the receiving plate 62 causes the mounting plate 20 to vibrate. This situation only applies when the snowfall is light. When the snowfall is heavy, the vibration of the mounting plate 20 alone is insufficient to prevent the photovoltaic panel 34 from being damaged. By setting the trigger mechanism 70, when the snowfall is heavy, more snowflakes will fall on the periodic heating plate 61 within a certain period of time. This will result in a greater impact force on the receiving plate 62 when the snow melts. The sliding distance of the receiving plate 62 will increase and it will contact the trigger mechanism 70. The trigger mechanism 70 will release the restriction of the limit mechanism 50 on the counterweight mechanism 40. After the restriction is released, because the snowfall is heavy, more and faster snowflakes will accumulate on the cover plate 30. When the force of the cover plate 30 sliding down along the roof surface 12 is greater than the weight of the counterweight mechanism 40, the cover plate 30 will automatically slide down and cover the mounting plate 20, thereby achieving further protection.

[0041] Furthermore, the roof surface 12 is provided with a guide mechanism 80 for guiding the sliding of the cover plate 30. Under the guidance of the guide mechanism 80, the cover plate 30 slides downward along the roof surface 12. The guide mechanism 80 includes two second slide rails 81 fixed on both sides of the surface of the roof surface 12. A vibration mechanism 90 is provided in the second slide rails 81. The vibration mechanism 90 is used to drive the cover plate 30 to vibrate left and right in the direction perpendicular to the length of the second slide rails 81 when the cover plate 30 slides in the length direction of the second slide rails 81. A guide groove 810 is embedded in the inner side of the second slide rails 81. A limiting plate 301 is fixed on the side of the cover plate 30 and slides and limits it in the guide groove 810. The vibration mechanism 90 includes sliding blocks 91 slidably disposed on both sides of the bottom of the cover plate 30. A second spring is connected between the sliding blocks 91 and the cover plate 30. Spring 92, and sliding block 91 is equipped with pulley 93. The inner side of the second slide rail 81 is provided with S-shaped guide groove 94. The pulley 93 is rolled in the S-shaped guide groove 94. Through the guidance of the S-shaped guide groove 94 and pulley 93, when the cover plate 30 slides down along the length direction of the second slide rail 81, it will also sway left and right in the direction perpendicular to the length direction of the second slide rail 81, achieving a vibration effect. It should be understood that the depth of the guide groove 810 should be greater than the width of the limiting plate 301. The limiting plate 301 not only slides in the length direction of the guide groove 810, but also slides in the direction perpendicular to the guide groove 810. Through the left and right sliding of the cover plate 30, it is beneficial to shake off the snowflakes that have clumped on the cover plate 30. When the cover plate 30 slides to the bottom position, the snow clumps at its top can be automatically thrown outward under the action of inertia, reducing the weight on the top of the cover plate 30.

[0042] Preferably, bells 95 are installed on both sides of the cover plate 30, so that when the cover plate 30 slides down and vibrates left and right, the bells 95 can make a sound to remind pedestrians to move away quickly and prevent snow from hitting their heads.

[0043] Preferably, the upper end of the cover plate 30 is provided with a snow collection trough 31. The snow collection trough 31 has an opening on one side located below the roof surface 12. A baffle 32 is rotatably installed inside the opening. A gear 33 is fixed to the pivot of the baffle 32. Two stop blocks 100 are fixed on both sides of the lowest position of the roof surface 12 to limit the further downward sliding of the cover plate 30. A rack 101 corresponding to the gear 33 is fixed to the stop block 100. When the cover plate 30 slides to the lowest position of the roof surface 12, the rack 101 meshes with the gear 33, causing the baffle 32 to rotate downward and open. It can be understood that the pivot of the baffle 32 and the opening are... A torsion spring (not shown in the figure) is connected between the two. Initially, the cover plate 30 is located above the roof surface 12. Under the action of the torsion spring, the baffle 32 should be in an upright state, so that the opening below the collection trough 31 is closed. In this way, the collection trough 31 can better store snowflakes. The weight of the snowflakes drives the cover plate 30 to move. When the cover plate 30 slides down, the rack 101 of the stop block 100 will first mesh with the gear 33, pushing the gear 33 to rotate, thereby driving the baffle 32 to rotate downward and open. Then, the cover plate 30 slides down and hits the stop block 100, so that the snow in the collection trough 31 can be automatically thrown out through the opening.

[0044] Please see Figure 1 The counterweight mechanism 40 includes a steel rope 41 fixedly connected to the cover plate 30, a counterweight block 42 connected to the steel rope 41, a first slide rail 43 fixed to the side of the wall 11, and the counterweight block 42 and the first slide rail 43 slidably connected.

[0045] Please see Figure 4 The limiting mechanism 50 includes a copper sleeve 51 fixed inside the first slide rail 43. A spring pin 52 is provided inside the copper sleeve 51. The side of the counterweight 42 is provided with a fixing groove that cooperates with the spring pin 52. When the head of the spring pin 52 is inserted into the fixing groove on the side of the counterweight 42, it can limit the counterweight 42 and restrict the counterweight 42 from moving upward on the first slide rail 43.

[0046] Specifically, the spring pin 52 includes a base 521, a locking block 522, and a fifth spring 523. The base 521 is slidably disposed inside the copper sleeve 51 near the counterweight 42, and a third spring 53 is connected to the end of the base 521 and the end of the copper sleeve 51 away from the counterweight 42. A groove is provided at the end of the base 521 near the counterweight 42, and the locking block 522 is slidably disposed within the groove. The fifth spring 523 is connected between the groove and the locking block 522. The head of the locking block 522 has beveled sides, and the shape of the fixing groove matches the shape of the head of the locking block 522. By engaging the locking block 522 into the fixing groove, the position of the counterweight block 42 is limited. In reality, it is not only heavy snow that will damage the photovoltaic panel 34. Even when the snowfall is light but lasts for a long time, the snow volume is still large and will still damage the photovoltaic panel 34. Because the snowfall is light and slow, the snow pieces falling on the receiving plate 62 are insufficient to trigger the triggering mechanism 70. In this case, as the snow accumulation in the collection groove 31 gradually increases, the tension of the steel cable 41 gradually increases. When the tension of the steel cable 41 is large enough, the locking block 522 will also disengage from the fixing groove on the side of the counterweight block 42, causing the cover plate 30 to slide downward.

[0047] Specifically, the triggering mechanism 70 includes an electromagnet 71 fixed to the end of the copper sleeve 51 away from the counterweight 42. A trigger switch 72 is provided on the surface of the wall 11 below the receiving plate 62. The trigger switch 72 and the electromagnet 71 are electrically connected through a wire 73. Pressing the trigger switch 72 energizes the electromagnet 71. The spring pin 52 is slidably connected to the copper sleeve 51, and a third spring 53 is connected to the end of the spring pin 52 and the copper sleeve 51 away from the counterweight 42. The receiving plate 62 slides downward and contacts the trigger switch 72, which connects the external power supply to the electromagnet 71. After being energized, the electromagnet 71 generates magnetic force. The spring pin 52 is drawn downwards and the third spring 53 is compressed. At this time, the locking block 522 of the spring pin 52 is still inserted in the fixing groove of the counterweight block 42 under the elastic force of the fifth spring 523. However, the fifth spring 523 inside the spring pin 52 will stretch and the elasticity will decrease, which will reduce the friction between the locking block 522 and the fixing groove, making it easier to detach from the fixing groove. As snow accumulates in the collection groove 31 of the cover plate 30, the upward pulling force on the steel rope 41 will gradually increase. When it increases to a certain value, the locking block 522 will disengage from the fixing groove, completely releasing the restriction on the counterweight block 42, so that the cover plate 30 will automatically slide downwards under the gravity of the snowflakes.

[0048] Preferably, the surface of the receiving plate 62 is connected to a shaking plate 66 by a fourth spring 65. The shaking plate 66 is inclinedly disposed on the surface of the receiving plate 62. By disposing of the shaking plate 66, after the snow blocks fall on the receiving plate 62, the shaking plate 66 can quickly shake off the snow on its surface, preventing snow from accumulating on its surface and affecting the reset of the mounting plate 20.

[0049] The photovoltaic panel 34 is mounted on the mounting plate 20, and the electricity stored in the photovoltaic panel 34 can be supplied to the electromagnet 71 and the periodic heating plate 61.

[0050] Working Principle: This invention relates to a prefabricated light steel farmhouse. The roof surface 12 is equipped with photovoltaic panels 34 via mounting plates 20. These panels absorb solar energy and convert it into electricity, resulting in energy conservation and environmental protection. In light snowfall, snowflakes fall onto the surface of a periodically heated plate 61. After being heated by the plate, the snow automatically slides down onto a receiving plate 62. This causes the receiving plate 62 to slide down and pull the mounting plate 20 downwards via a pull rope 63. After the snow falls above the receiving plate 62, it is released by a shaking plate 66. Under the elastic force of the first spring 64, the mounting plate 20 moves upwards rapidly, creating a vibration effect that automatically shakes off the snow from the surface of the photovoltaic panels 34. If the snowfall is prolonged, excessive snow accumulation in the collection trough 31 causes the spring pin 52's locking block 522 to automatically disengage from the fixing slot of the counterweight block 42, allowing the cover plate 30 to slide downwards and cover the mounting plate 20. Similarly, in heavy snowfall... As the snowflakes fall onto the receiving plate 62, they grow larger, causing the receiving plate 62 to move downwards a greater distance and come into contact with the trigger switch 72. This activates the electromagnet 71, generating magnetic force that attracts the spring pin 52 to move backwards. This reduces the friction between the locking block 522 of the spring pin 52 and the fixing groove of the counterweight block 42. When a small amount of snow is collected in the collection groove 31 above the cover plate 30, the spring pin 52 is no longer sufficient to restrain the counterweight block 42, causing the cover plate 30 to slide downwards automatically and react more quickly. As the cover plate 30 slides downwards, it sways left and right under the action of the vibration mechanism 90, dispersing the snow on the surface. During the swaying, the bell 95 rings, alerting pedestrians to move away. When the cover plate 30 approaches the stop block 100, the rack 101 pushes the gear 33 to rotate, causing the baffle 32 to open. Then, the cover plate 30 collides with the stop block 100, causing the snow in the collection groove 31 to be automatically thrown out.

[0051] The above description of the embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prefabricated light steel farmhouse, comprising a light steel farmhouse body (10), wherein the light steel farmhouse body (10) includes a wall (11) and two roof surfaces (12) fixed to the upper end of the wall (11) and having sloping sides, characterized in that, The main body of the light steel farmhouse (10) also includes: Mounting plate (20) is fixedly mounted with photovoltaic panel (34), and mounting plate (20) is slidably disposed on the surface of the roof surface (12) near the lower part; The cover plate (30) is slidably disposed on the surface of the roof surface (12) near the upper part; The counterweight mechanism (40) is connected to one end of the cover plate (30) near the upper part of the roof surface (12) and is mounted on the wall (11) by a limiting mechanism (50); A vibration mechanism (60) that causes the mounting plate (20) to vibrate intermittently in its sliding direction. The vibration mechanism (60) includes a periodic heating plate (61) fixed at the lowest position of the roof surface (12). The surface of the wall (11) is provided with a groove. A receiving plate (62) is slidably provided in the groove. The receiving plate (62) is located below the periodic heating plate (61). A pull rope (63) is connected between the receiving plate (62) and the mounting plate (20). A first spring (64) is connected between the mounting plate (20) and the roof surface (12). A triggering mechanism (70) is connected between the vibration mechanism (60) and the limiting mechanism (50); The counterweight mechanism (40) includes a steel rope (41) fixedly connected to the cover plate (30), the steel rope (41) is connected to a counterweight block (42), the wall (11) is fixed with a first slide rail (43), and the counterweight block (42) and the first slide rail (43) are slidably connected. The limiting mechanism (50) includes a copper sleeve (51) fixed in the first slide rail (43), a spring pin (52) is provided in the copper sleeve (51), and a fixing groove that cooperates with the spring pin (52) is provided on the side of the counterweight (42). The triggering mechanism (70) includes an electromagnet (71) fixed to the end of the copper sleeve (51) away from the counterweight (42). A trigger switch (72) is provided on the surface of the wall (11) below the receiving plate (62). The trigger switch (72) and the electromagnet (71) are electrically connected by a wire (73). The spring pin (52) and the copper sleeve (51) are slidably connected, and a third spring (53) is connected to the end of the spring pin (52) and the copper sleeve (51) away from the counterweight (42).

2. The prefabricated light steel farmhouse according to claim 1, characterized in that, The roof surface (12) is provided with a guide mechanism (80) for guiding the sliding of the cover plate (30). The guide mechanism (80) includes two second slide rails (81) fixed on both sides of the surface of the roof surface (12). The second slide rails (81) are provided with a vibration mechanism (90). The vibration mechanism (90) includes sliding blocks (91) slidably disposed on both sides of the bottom of the cover plate (30). A second spring (92) is connected between the sliding block (91) and the cover plate (30). The sliding block (91) is equipped with a pulley (93). The inner side of the second slide rail (81) is provided with an S-shaped guide groove (94). The pulley (93) is rolled in the S-shaped guide groove (94).

3. A prefabricated light steel farmhouse according to claim 2, characterized in that, Bells (95) are installed on both sides of the cover plate (30).

4. A prefabricated light steel farmhouse according to claim 1, characterized in that, The upper end of the cover plate (30) is provided with a collection trough (31) for collecting snow. The collection trough (31) has an opening on one side located below the roof surface (12). A baffle (32) is rotatably provided in the opening. A gear (33) is fixed to the rotating shaft of the baffle (32). A stop block (100) is fixed at the lowest position of the roof surface (12). A rack (101) corresponding to the gear (33) is fixed to the stop block (100).

5. A prefabricated light steel farmhouse according to claim 1, characterized in that, The surface of the receiving plate (62) is connected to a shaking plate (66) by a fourth spring (65), and the shaking plate (66) is inclinedly disposed on the surface of the receiving plate (62).

6. A prefabricated light steel farmhouse according to claim 1, characterized in that, The spring pin (52) includes a base (521), a locking block (522), and a fifth spring (523). The base (521) is slidably disposed inside the copper sleeve (51) near the counterweight (42), and a third spring (53) is connected to the end of the base (521) and the end of the copper sleeve (51) away from the counterweight (42). The end of the base (521) near the counterweight (42) is provided with a groove, and the locking block (522) is slidably disposed in the groove. The fifth spring (523) is connected between the groove and the locking block (522). The head of the locking block (522) has a beveled structure on both sides, and the shape of the fixing groove matches the head shape of the locking block (522).

7. A prefabricated light steel farmhouse according to claim 2, characterized in that, The second slide rail (81) has a guide groove (810) embedded in its inner side, and the cover plate (30) has a limiting plate (301) fixedly provided on its side. The limiting plate (301) is slidably limited in the guide groove (810).

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