A snow removing method suitable for multi-span greenhouse

Abstract

The present application belongs to the technical field of greenhouse, and relates to a snow removing method suitable for multi-span greenhouse. The method is characterized by installing a V-shaped opening and closing mechanism above the gutter of the multi-span greenhouse. By controlling the opening and closing of the V-shaped opening and closing mechanism, the snow in the V-shaped opening and closing mechanism falls into the gutter. The flowing water in the gutter melts the snow, thereby achieving the purpose of snow removing. The method has the advantages of simple operation, easy implementation, low initial investment, low running cost, energy saving and environmental protection.

Description

Technical Field

[0001] This invention belongs to the field of greenhouse technology, specifically relating to a snow removal method suitable for multi-span greenhouses. Background Technology

[0002] Multi-span greenhouses offer advantages such as high land utilization, large overall space, good insulation, easy unified management of the internal environment, and low cost, and have been widely adopted in northern my country. However, northern my country experiences heavy snowfall in winter, and snow covering the greenhouse roof not only affects sunlight inside but also causes mechanical damage. Excessive snow can even cause the greenhouse to collapse, resulting in serious losses. Therefore, timely snow removal for multi-span greenhouses is crucial.

[0003] There are four existing methods for snow removal in multi-span greenhouses: (1) Manually removing snow from the roof of the greenhouse by poking or shaking it, so that the snow accumulates between two adjacent greenhouses, and then manually removing it with tools. This method has the disadvantages of large workload for operators, easy damage to the greenhouse plastic film, and reduced service life of the greenhouse; (2) Installing anti-snow removal equipment on the existing greenhouse, but the anti-snow removal equipment has the disadvantages of complex structure, inconvenient use, and easy damage to the greenhouse plastic film; (3) Installing hot water pipes on the inside of the roof of the greenhouse for snow melting and removal. This method is inefficient and does not run smoothly. When used in northern my country, the snow melting pipes are prone to freezing and cracking. If antifreeze is added, the initial investment will be too high; (4) Installing electromagnetic heating belts in the gutter of the multi-span greenhouse to melt and remove snow by electric heating. This method has the disadvantages of high initial investment and high power consumption during operation. Summary of the Invention

[0004] The purpose of this invention is to provide a snow removal method suitable for multi-span greenhouses. This method involves installing a V-shaped opening and closing mechanism above the gutter of the multi-span greenhouse. By controlling the opening and closing of the V-shaped opening and closing mechanism, the snow inside the mechanism falls into the gutter, and the flowing water in the gutter melts the snow, thus achieving the purpose of snow removal. This method has the advantages of simple operation, easy implementation, low initial investment, low operating cost, energy saving and environmental protection.

[0005] To achieve the above objectives, the present invention employs the following technical solution:

[0006] A snow removal method suitable for multi-span greenhouses, the method comprising the following steps:

[0007] Step S1: Install a V-shaped opening and closing mechanism above the gutter of the multi-span greenhouse. The V-shaped opening and closing mechanism can complete the opening and closing action. The two sides of the V-shaped opening and closing mechanism are respectively connected to the coverings on the roofs of the two adjacent greenhouse frames. The snow on the coverings falls into the V-shaped opening and closing mechanism along the slope.

[0008] Step S2: When clearing snow, water is introduced into the gutters of the multi-span greenhouse to keep the water flowing.

[0009] Step S3: Control the opening / closing frequency of the V-shaped opening and closing mechanism according to the amount of snow. When the V-shaped opening and closing mechanism is open, the snow inside the V-shaped opening and closing mechanism falls into the gutter, and the water flowing in the gutter melts the snow and drains it out.

[0010] As a preferred embodiment of the present invention, the V-shaped opening and closing mechanism includes a first movable body, a second movable body, a first driving mechanism, and a second driving mechanism; wherein, the first movable body and the second movable body are both disposed above the gutter of the multi-span greenhouse and arranged in a V-shape, the upper end of the first movable body is mounted on the greenhouse frame through a connector and connects with the covering material on the top of the greenhouse frame, and can rotate relative to the greenhouse frame, the lower end of the first movable body is connected to the first driving mechanism, and the first driving mechanism drives the first movable body to move; the upper end of the second movable body is mounted on the greenhouse frame through a connector and connects with the covering material on the top of the greenhouse frame, and can rotate relative to the greenhouse frame, the lower end of the second movable body is connected to the second driving mechanism, and the second driving mechanism drives the second movable body to move; the first driving mechanism and the second driving mechanism drive the first movable body and the second movable body to move in opposite directions, realizing the closing of the V-shaped opening and closing mechanism; the first driving mechanism and the second driving mechanism drive the first movable body and the second movable body to move in opposite directions, realizing the opening of the V-shaped opening and closing mechanism.

[0011] As a preferred embodiment of the present invention, sealing plates are installed at both ends of the gutter. When the V-shaped opening and closing mechanism is closed, the V-shaped opening and closing mechanism and the sealing plates at both ends of the gutter form a closed cover. The gutter and the water flowing inside are contained inside the closed cover, and the inside of the closed cover is connected to the inside of the multi-span greenhouse.

[0012] As a preferred embodiment of the present invention, one end of the gutter is connected to the inlet pipe and the other end of the gutter is connected to the outlet pipe.

[0013] As a preferred embodiment of the present invention, the covering material on the roof of the multi-span greenhouse is a light-transmitting covering material, including greenhouse film, polycarbonate sheet, and glass sheet.

[0014] As a preferred embodiment of the present invention, the first movable body and the second movable body are an integral light-transmitting body.

[0015] As a preferred embodiment of the present invention, the first movable body is connected to at least two first driving mechanisms; the second movable body is connected to at least two second driving mechanisms; the first driving mechanism and the second driving mechanism are bidirectional driving mechanisms, including an electric push rod, a push-pull cylinder, an electro-hydraulic push rod, a gear and rack linear module, and a winding rope module.

[0016] As a preferred embodiment of the present invention, the first movable body and the second movable body are integrated light-transmitting bodies composed of a greenhouse film and a connecting rod or a tensioned wire or steel wire. The upper end of the greenhouse film is installed and fixed on the greenhouse frame through a film-clamping groove, and the lower end of the greenhouse film is wrapped and fixed on the connecting rod or the tensioned wire or steel wire. The connecting rod or the tensioned wire or steel wire keeps the greenhouse film in a certain degree of integrity. The first driving mechanism and the second driving mechanism are connected to the connecting rod or the tensioned wire or steel wire.

[0017] As a preferred embodiment of the present invention, the first movable body and the second movable body are an integrated light-transmitting body composed of a polycarbonate sheet or a glass sheet and an installation frame. The polycarbonate sheet or glass sheet is fixedly mounted on the installation frame. The upper end of the installation frame is mounted on the greenhouse frame via a hinge. The first drive mechanism and the second drive mechanism are connected to the lower end of the installation frame.

[0018] As a further preferred embodiment of the present invention, the multi-span greenhouse is also equipped with a vibration device and ventilation windows on the greenhouse frame, and an insulation blanket is also provided inside the multi-span greenhouse.

[0019] Compared with the prior art, the advantages and beneficial effects of the present invention are:

[0020] (1) The snow removal method provided by the present invention installs a V-shaped opening and closing mechanism above the gutter (drainage channel) of the multi-span greenhouse. By controlling the opening and closing of the V-shaped opening and closing mechanism, the snow in the V-shaped opening and closing mechanism falls into the gutter in batches. By passing water into the gutter, the water flowing in the gutter melts the snow in batches, thereby achieving the purpose of snow removal. The method is simple to operate, easy to implement, and has low initial investment, low operating cost, and is energy-saving and environmentally friendly.

[0021] (2) The snow removal method provided by the present invention can remove snow during the snowfall process, ensuring that the roof of the multi-span greenhouse is not covered with snow, effectively avoiding mechanical damage and insufficient light caused by snow accumulation to the multi-span greenhouse, and also avoiding the problem of low temperature inside the greenhouse caused by snow melting. The snow removal method removes snow in a timely manner, solving the problem of snow's impact on the greenhouse from the root. In addition, the snow removal method will not damage the greenhouse film and will not affect the service life of the greenhouse.

[0022] (3) The present invention installs a V-shaped opening and closing mechanism above the gutter. When the V-shaped opening and closing mechanism is closed, the V-shaped opening and closing mechanism and the sealing plates at both ends of the gutter form a closed cover. The gutter and the water flowing inside are precisely sealed inside the closed cover. Therefore, the V-shaped opening and closing mechanism can not only reasonably control the amount of snow falling into the gutter, but also keep the water flowing inside the gutter warm, preventing the water in the gutter from freezing and affecting the snow removal effect.

[0023] (4) The first and second movable bodies of the V-shaped opening and closing mechanism of the present invention are integrated light-transmitting bodies, which can directly utilize the greenhouse film, polycarbonate sheet or glass plate commonly used in existing multi-span greenhouses. This can ensure sufficient light in the multi-span greenhouse under normal weather conditions, while also ensuring the consistency of the roof covering and the aesthetics of the multi-span greenhouse.

[0024] (5) The V-shaped opening and closing mechanism of the present invention can be directly installed on the greenhouse frame when building the greenhouse. It does not need to be removed even in the spring and autumn seasons when there is no snow, because the installation of the V-shaped opening and closing mechanism will not affect the discharge of rainwater. In the spring and autumn rainy seasons, the rainwater can be discharged into the gutter by controlling the V-shaped opening and closing mechanism to open.

[0025] (6) By controlling the movement of the first and second movable bodies of the V-shaped opening and closing mechanism (so that they are in a half-open and half-closed state), the present invention can form a long and narrow ventilation opening between the first and second movable bodies and the greenhouse frame, and use the ventilation opening to ventilate the multi-span greenhouse, thus solving the technical problem of poor ventilation effect of existing multi-span greenhouses.

[0026] (7) The V-shaped opening and closing mechanism of the present invention can be controlled by a controller to control its opening and closing action. The frequency of opening and closing can be adjusted manually according to the amount of snow. Then, the controller can be used to realize automated snow removal, and the snow removal method is simple.

[0027] (8) The snow water melted by the snow removal method provided by the present invention is discharged along with the water in the gutter. This method facilitates the recycling of snow water and water in the gutter, thus saving water resources. Attached Figure Description

[0028] Figure 1 This is a flowchart of the snow removal method of the present invention;

[0029] Figure 2 This is a schematic diagram of a multi-span greenhouse equipped with a V-shaped opening and closing mechanism;

[0030] Figure 3 This is a schematic diagram of the installation of the V-shaped opening and closing mechanism on a multi-span greenhouse when the drive mechanism is an electric push rod;

[0031] Figure 4 This is a schematic diagram of the installation of a V-shaped opening and closing mechanism on a multi-span greenhouse when the drive mechanism is a gear and rack linear module.

[0032] Figure 5 This is a schematic diagram of the installation of the V-shaped opening and closing mechanism on a multi-span greenhouse when the drive mechanism is a winding rope module.

[0033] Figure 6 This is a schematic diagram of the gutter inside the enclosed cover.

[0034] Reference numerals: 1. First movable body; 2. Second movable body; 3. First drive mechanism; 4. Second drive mechanism; 5. Greenhouse frame; 6. Gutter; 7. Sealing plate. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions and advantages of the present invention, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be noted that the terms "upper" and "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use. They are only used to facilitate the description of this application and to simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] like Figure 1 , Figure 2 As shown, the present invention provides a snow removal method suitable for multi-span greenhouses, the method comprising the following steps:

[0039] Step S1: Install a V-shaped opening and closing mechanism A above the gutter of the multi-span greenhouse. The V-shaped opening and closing mechanism A can complete the opening and closing action. The two sides of the V-shaped opening and closing mechanism A are respectively connected to the coverings on the roofs of the two adjacent greenhouse frames 5. The snow on the coverings falls into the V-shaped opening and closing mechanism along the slope. The coverings on the roofs of the multi-span greenhouses are light-transmitting coverings, including greenhouse film, polycarbonate panels, glass panels, etc.

[0040] Step S2: When clearing snow, pour water into the gutters of the multi-span greenhouse to keep the water flowing; the water in the gutters can be at room temperature and does not need to be heated.

[0041] Step S3: Control the opening / closing frequency of the V-shaped opening and closing mechanism according to the amount of snow. When the V-shaped opening and closing mechanism is open, the snow inside the V-shaped opening and closing mechanism falls into the gutter, and the water flowing in the gutter melts the snow and drains it out.

[0042] The innovation of this invention lies in using a V-shaped opening and closing mechanism to control the amount of snow discharged into the gutter, and then using the water flowing in the gutter to melt the snow in batches. This embodiment does not limit the specific structure of the V-shaped opening and closing mechanism; any mechanism that can complete the opening and closing action is acceptable.

[0043] Furthermore, to prevent the water in the gutters from freezing in winter in northern my country and affecting snow removal efficiency, sealing plates 7 are installed at both ends of the gutters. When the V-shaped opening and closing mechanism is closed, the V-shaped opening and closing mechanism A and the sealing plates 7 at both ends of the gutters form a closed cover, and the gutter 6 and the water flowing inside it are sealed inside the closed cover (see...). Figure 6 The closed V-shaped opening and closing mechanism is used to keep the water flowing inside the gutter warm.

[0044] Furthermore, the interior of the sealed cover is connected to the interior of the multi-span greenhouse. At this point, it is equivalent to the gutter and the water flowing inside being sealed inside the greenhouse, using the temperature inside the greenhouse to ensure that the water inside the gutter does not freeze.

[0045] Furthermore, one end of the gutter 6 is connected to the inlet pipe, which continuously supplies water to the gutter, keeping the water in the gutter in a flowing state; the other end of the gutter 6 is connected to the outlet pipe, which discharges the melted snow and the flowing water in the gutter.

[0046] like Figure 3 As shown, in another embodiment, the V-shaped opening and closing mechanism A includes a first movable body 1, a second movable body 2, a first driving mechanism 3, and a second driving mechanism 4; wherein, the first movable body 1 and the second movable body 2 are both arranged above the gutter (also called drainage trough) 6 of the multi-span greenhouse and are arranged in a V-shape. The upper end of the first movable body 1 is installed on the greenhouse frame 5 through a connector and is connected to the light-transmitting covering on the roof of the greenhouse frame. It can rotate relative to the greenhouse frame. The lower end of the first movable body 1 is connected to the first driving mechanism 3, and the first movable body is driven to move through the first driving mechanism 3. The upper end of the second movable body 2 is installed on the greenhouse frame 5 (which is adjacent to the greenhouse frame on which the first movable body 1 is installed) through a connector and is connected to the light-transmitting covering on the greenhouse frame. It can rotate relative to the greenhouse frame. The lower end of the second movable body 2 is connected to the second driving mechanism 4, and the second movable body 2 is driven to move through the second driving mechanism 4.

[0047] The first drive mechanism 3 and the second drive mechanism 4 are electric push rods, push-pull cylinders, or electro-hydraulic push rods. The first drive mechanism 3 and the second drive mechanism 4 are installed and fixed on the greenhouse frame. The movable ends of the first drive mechanism 3 and the second drive mechanism 4 are respectively connected to the first movable body 1 and the second movable body 2. The first drive mechanism 3 and the second drive mechanism 4 drive the first movable body 1 and the second movable body 2 to move in opposite directions, thereby closing the V-shaped opening and closing mechanism. The first drive mechanism 3 and the second drive mechanism 4 drive the first movable body 1 and the second movable body 2 to move in opposite directions, thereby opening the V-shaped opening and closing mechanism.

[0048] Furthermore, to ensure sufficient sunlight inside the multi-span greenhouse under normal weather conditions, the first movable body 1 and the second movable body 2 are integrated light-transmitting bodies; in addition, to ensure the consistency of the roof covering of the multi-span greenhouse and to ensure the aesthetics of the multi-span greenhouse, the first movable body 1 and the second movable body 2 use the same greenhouse film, polycarbonate sheet or glass sheet as the covering material on existing multi-span greenhouses.

[0049] Furthermore, the first movable body 1 is connected to at least two first drive mechanisms 3; the second movable body 2 is connected to at least two second drive mechanisms 4; the number and position of the first drive mechanism 3 and the second drive mechanism 4 are determined according to the length of the first movable body 1 and the second movable body 2, and drive mechanisms are usually installed at both ends and in the middle of the first movable body 1 and the second movable body 2.

[0050] like Figure 4 As shown, in another embodiment, the first drive mechanism 3 and the second drive mechanism 4 are gear and rack linear modules. The gear and rack linear module includes a drive motor, a gear 8, and a linear rack 9. The drive motor is mounted and fixed on the greenhouse frame. The drive motor is connected to the gear and drives the gear to rotate. The gear meshes with the linear rack and drives the linear rack to move. The linear rack 9 of the first drive mechanism 3 is connected to the first movable body 1, and the linear rack 9 of the second drive mechanism 4 is connected to the second movable body 2.

[0051] like Figure 5 As shown, in another embodiment, the first drive mechanism 3 and the second drive mechanism 4 are a winding rope module. The winding rope module includes a winder and a rope wound on the winder. The winder of the first drive mechanism 3 is installed and fixed on the greenhouse frame and is arranged opposite to the first movable body 1. The winder of the second drive mechanism 4 is installed and fixed on the greenhouse frame and is arranged opposite to the second movable body 1. The rope of the first drive mechanism is connected to the first movable body 1, and the rope of the second drive mechanism is connected to the second movable body 2. By controlling the length of the rope through the winder, the three states of the V-shaped opening and closing mechanism—closed, open, and half-open—can be realized.

[0052] The first driving mechanism 3 and the second driving mechanism 4 described in this invention can be bidirectional driving mechanisms, and the specific forms of the first driving mechanism 3 and the second driving mechanism 4 are not limited to the structures provided in the above embodiments.

[0053] Furthermore, to achieve automated snow removal, the opening and closing frequency can be manually adjusted according to the amount of snow, and then the bidirectional drive mechanism can be controlled by the controller to complete the opening and closing action at the inherent frequency.

[0054] In another embodiment, the first movable body 1 and the second movable body 2 are an integrated light-transmitting body composed of a movable greenhouse film and a connecting rod or a tensioned wire or steel wire. The upper end of the movable greenhouse film is installed and fixed on the greenhouse frame through a film-clamping groove, and it connects with the original greenhouse film on the greenhouse frame. The lower end of the movable greenhouse film is wrapped and fixed on the connecting rod or the tensioned wire or steel wire. The movable greenhouse film maintains a certain integrity through the connecting rod or the tensioned wire or steel wire. The first driving mechanism 3 and the second driving mechanism 4 are connected to the connecting rod or the tensioned wire or steel wire.

[0055] Furthermore, when the V-shaped opening and closing mechanism is open, two functions can be achieved by controlling the movement stroke of the first movable body 1 and the second movable body 2. When the first movable body 1 and the second movable body 2 are in a fully open state, the first movable body 1 is tightly attached to the greenhouse frame, forming a complete greenhouse film with the original greenhouse film on the greenhouse frame, thus achieving the purpose of heat preservation. When the first movable body 1 and the second movable body 2 are in a half-open and half-closed state, a long and narrow ventilation opening will be formed between the first movable body 1, the second movable body 2 and the greenhouse frame. At this time, the ventilation opening can be used to ventilate the multi-span greenhouse, solving the technical problem of poor ventilation effect in existing multi-span greenhouses.

[0056] In another embodiment, the first movable body and the second movable body are an integrated light-transmitting body composed of a polycarbonate sheet or glass plate and an installation frame. The polycarbonate sheet or glass plate is fixed on the installation frame, and the upper end of the installation frame is mounted on the greenhouse frame by a hinge. The first drive mechanism and the second drive mechanism are connected to the lower end of the installation frame.

[0057] In another embodiment, the multi-span greenhouse is also equipped with a vibration device and ventilation windows on the greenhouse frame. The vibration device is used to evenly drop snow from the roof into the V-shaped opening and closing mechanism along the slope; the ventilation windows are used to ventilate the multi-span greenhouse; and the multi-span greenhouse is also equipped with insulation blankets to keep the multi-span greenhouse warm.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and are not intended to limit them. Although the embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the embodiments of the present invention.

Claims

1. A snow removal method suitable for multi-span greenhouses, characterized in that, The method includes the following steps: Step S1: Install a V-shaped opening and closing mechanism above the gutter of the multi-span greenhouse. The V-shaped opening and closing mechanism can complete the opening and closing action. The two sides of the V-shaped opening and closing mechanism are respectively connected to the coverings on the roofs of the two adjacent greenhouse frames. The snow on the coverings falls into the V-shaped opening and closing mechanism along the slope. Step S2: When clearing snow, water is introduced into the gutters of the multi-span greenhouse to keep the water flowing. Step S3: Control the opening / closing frequency of the V-shaped opening and closing mechanism according to the amount of snow. When the V-shaped opening and closing mechanism is open, the snow inside the V-shaped opening and closing mechanism falls into the gutter, and the water flowing in the gutter melts the snow and drains it out.

2. The snow removal method for multi-span greenhouses according to claim 1, characterized in that, The V-shaped opening and closing mechanism includes a first movable body, a second movable body, a first driving mechanism, and a second driving mechanism. The first and second movable bodies are both positioned above the gutter of the multi-span greenhouse and arranged in a V-shape. The upper end of the first movable body is mounted on the greenhouse frame via a connector, engaging with the covering material on the greenhouse frame's roof. It is rotatable relative to the greenhouse frame. The lower end of the first movable body is connected to the first driving mechanism, which drives its movement. The upper end of the second movable body is mounted on the greenhouse frame via a connector, engaging with the covering material on the greenhouse frame's roof. It is rotatable relative to the greenhouse frame. The lower end of the second movable body is connected to the second driving mechanism, which drives its movement. The first and second driving mechanisms drive the first and second movable bodies to move in opposite directions, closing the V-shaped opening and closing mechanism. The first and second driving mechanisms also drive the first and second movable bodies to move in opposite directions, opening the V-shaped opening and closing mechanism.

3. The snow removal method for multi-span greenhouses according to claim 1, characterized in that, Both ends of the gutter are fitted with sealing plates. When the V-shaped opening and closing mechanism is closed, the V-shaped opening and closing mechanism and the sealing plates at both ends of the gutter form a closed cover. The gutter and the water flowing inside are contained inside the closed cover. The inside of the closed cover is connected to the inside of the multi-span greenhouse.

4. The snow removal method for multi-span greenhouses according to claim 1, characterized in that, One end of the gutter is connected to the inlet pipe, and the other end of the gutter is connected to the outlet pipe.

5. A snow removal method suitable for multi-span greenhouses according to claim 1, characterized in that, The roof coverings of the multi-span greenhouses are light-transmitting, including greenhouse film, polycarbonate panels, and glass panels.

6. A snow removal method suitable for multi-span greenhouses according to claim 2, characterized in that, The first movable body and the second movable body are an integrated light-transmitting body.

7. A snow removal method suitable for multi-span greenhouses according to claim 2, characterized in that, The first movable body is connected to at least two first drive mechanisms; the second movable body is connected to at least two second drive mechanisms; the first drive mechanism and the second drive mechanism are bidirectional drive mechanisms, including an electric push rod, a push-pull cylinder, an electro-hydraulic push rod, a gear and rack linear module, and a winding rope module.

8. A snow removal method suitable for multi-span greenhouses according to claim 6, characterized in that, The first movable body and the second movable body are integrated light-transmitting bodies composed of a greenhouse film and a connecting rod or a tensioned wire or steel wire. The upper end of the greenhouse film is installed and fixed on the greenhouse frame through a film-clamping groove, and the lower end of the greenhouse film is wrapped and fixed on the connecting rod or the tensioned wire or steel wire. The first drive mechanism and the second drive mechanism are connected to the connecting rod or the tensioned wire or steel wire.

9. A snow removal method suitable for multi-span greenhouses according to claim 6, characterized in that, The first movable body and the second movable body are integrated light-transmitting bodies composed of a polycarbonate sheet or glass plate and an installation frame. The polycarbonate sheet or glass plate is fixed on the installation frame. The upper end of the installation frame is mounted on the greenhouse frame through a hinge. The first drive mechanism and the second drive mechanism are connected to the lower end of the installation frame.

10. A snow removal method suitable for multi-span greenhouses according to any one of claims 1 to 9, characterized in that, The multi-span greenhouse is also equipped with a vibration device and ventilation windows on the greenhouse frame, and is also equipped with heat insulation blankets inside the multi-span greenhouse.

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