Inner film covering structure for greenhouse

Abstract

The utility model relates to the technical field of greenhouses, and discloses a greenhouse which comprises a framework connected between two gable walls and two inner greenhouse films symmetrically hung below the framework, the sides, close to the bottoms of the corresponding gable walls, of the two inner greenhouse films droop along the edges and make contact with the ground, and film bodies, close to the tops of the corresponding gable walls, of the inner greenhouse films are fixed to the framework. The edges, close to each other, of the two inner greenhouse films are slidably connected with the framework, power assemblies are connected to the inner greenhouse films so as to drive the opposite side edges of the two inner greenhouse films to be close to each other or away from each other, the framework comprises a plurality of steel wire ropes extending horizontally, the two ends of each steel wire rope are fixedly connected with the two gable walls respectively, and each steel wire rope is slidably connected with a plurality of hook pieces; and the inner greenhouse film is close to the film body at the top of the corresponding gable wall and the steel wire rope. The greenhouse is simple in structure and low in cost, the illumination effect is good in the daytime, the inner greenhouse film can achieve the all-around covering and enclosing effect, and the heat preservation performance of the greenhouse is improved.

Description

Technical Field

[0001] This utility model relates to the field of greenhouse technology, and in particular to an inner membrane covering structure for greenhouses. Background Technology

[0002] With global climate change and increasingly frequent extreme winter weather, greenhouse cultivation has been greatly affected, and planting efficiency has been severely restricted by low temperatures. Therefore, the importance of greenhouse insulation and cold protection has become increasingly prominent, leading to the development of various greenhouse insulation and cold protection technologies. Among them, building an inner film (referred to as a double film) in the greenhouse to isolate air has become an important technology for greenhouse insulation and cold protection in the field of smart agriculture. The inner film covering technology has been widely used in greenhouse cultivation throughout my country. The insulation principle of the greenhouse inner film covering technology is mainly to build a second inner film inside the outer greenhouse, forming an air gap, thereby reducing heat conduction, blocking heat radiation, maintaining air stability and increasing humidity, reducing air convection and heat loss, and effectively increasing the temperature inside the greenhouse.

[0003] Currently, most existing greenhouse inner film covering structures are roller-rolled. First, a bow-shaped frame structure is welded and built inside the greenhouse using steel to cover the planting area inside the outer greenhouse. The side of this frame closer to the back wall is higher than the side closer to the front. The entire frame is fixed to the left and right gable walls by multiple horizontally extending beams with high-strength anchors, so that the frame supports the inner film. Then, the inner film is rolled into a roller, which is horizontally connected to the highest point of the frame with its axis parallel to the back wall. One end of the roller is connected to a motor. When the inner film needs to be covered, the motor is rotated, which moves the inner film along the bow-shaped steel frame. When the output shaft of the motor is reversed, the inner film is rolled up.

[0004] However, the current frame structure used to support the inner greenhouse film cannot cover the entire greenhouse, resulting in insufficient heat preservation. Due to the connection between the crossbeams of the frame and the gable walls on both sides, the inner greenhouse film cannot hang down to cover the area near the two gable walls. At the same time, the overall frame structure is relatively compact and complex, which not only results in poor daytime lighting conditions inside the greenhouse, but also makes the overall construction process difficult and costly. Utility Model Content

[0005] This utility model provides an inner film covering structure for greenhouses, which is simple in structure, low in cost, has good daytime light transmission effect, and enables the inner film to achieve all-round covering and enclosure effect, thereby improving the heat preservation of the greenhouse.

[0006] This utility model provides an inner film covering structure for a greenhouse, including a frame connected between two gable walls and two inner films symmetrically suspended below the frame. The two inner films hang down along their edges near the bottom of the corresponding gable walls and contact the ground. The inner films near the top of the corresponding gable walls are fixed to the frame. The edges of the two inner films that are close to each other are slidably connected to the frame. A power component is connected to the inner films to drive the opposite sides of the two inner films to move closer or further apart. The frame includes multiple horizontally extending steel wire ropes. The two ends of the steel wire ropes are fixed to the two gable walls respectively. Multiple hooks are slidably connected to each steel wire rope. The multiple hooks hook the inner films. The inner films near the top of the corresponding gable walls are connected to the steel wire ropes.

[0007] Preferably, it also includes two horizontally arranged push rods, which are respectively fixed to the edges of two inner films that are close to each other. The upper end of the hook is slidably connected to the wire rope through a hanging ring. The power unit drives the two push rods to move the two inner films.

[0008] Preferably, the power assembly includes: a winch, multiple first fixed pulleys, and multiple power ropes. The winch is horizontally rotatably connected to the first gable wall, and the axis of the winch is perpendicular to the wire rope. The winch is driven by a motor, and the motor housing is fixedly connected to the gable wall. The multiple first fixed pulleys are rotatably connected to the second gable wall. The axles of the first fixed pulleys extend vertically and are higher than the inner film. The multiple power ropes are connected to the winch and are evenly distributed along the axis of the winch. The first end of each power rope is fixedly connected to one side of the winch, and the second end extends horizontally towards the first fixed pulley, passes around the first fixed pulley, and is fixedly connected to the winch. The second end of the power rope is located on the opposite side of the first end. The push rods near the first gable wall are fixedly connected to each power rope before it passes around each first fixed pulley, and the push rods near the second gable wall are fixedly connected to each power rope after it passes around each first fixed pulley.

[0009] Considering the need for maintenance and replacement of the coiled steel and motor, it would be inconvenient to maintain if the coiled steel was at the same height as the first fixed pulley. Therefore, in this embodiment, the preferred height of the coil is half the height of the right gable wall. Considering that the power rope needs to turn and maintain the same height as the first fixed pulley, second fixed pulleys are set on the first gable wall above the coil, corresponding to the number and position of each first fixed pulley. At this time, the second end of the power rope is first extended upward to the second fixed pulley, and then after passing around the second fixed pulley, it can be extended horizontally to one side of the first fixed pulley. At the same time, considering that the power rope returns to the coil after passing around the first fixed pulley, it is also fixed. The system also requires a 90° downward turn, so a third fixed pulley is installed to allow the power rope, which has passed the first fixed pulley, to pass through the third fixed pulley and eventually extend downwards to be fixed to the boom. When the boom rotates counterclockwise, the power rope that has passed the third fixed pulley moves downwards and is wound into the boom. The opposite power rope will come off as the boom rotates and move toward the second fixed pulley, thus forming a closed loop. Since the two inner membranes are connected to the power ropes moving in different directions through push rods, the two inner membranes move toward each other, thus achieving the isolation effect of the inner membranes.

[0010] Preferably, the spacing between the steel wire ropes from the rear wall to the front roof is the same, so that when the two inner membranes are close together, the top membrane of the inner membrane is in a taut and stretched state.

[0011] Preferably, the height of the inner greenhouse membrane near the rear wall is higher than the height of the membrane near the front roof, the top membrane of the inner greenhouse membrane near the rear wall is horizontally set, the top membrane of the inner greenhouse membrane near the front roof is inclined downward, and the spacing between each wire rope and the inner greenhouse membrane is the same.

[0012] Preferably, the upper surface of the inner film is provided with hanging holes corresponding to each hook, and the hook of the hook is hung in the hanging hole.

[0013] Preferably, isolation grooves are provided on the ground inside the greenhouse near the two gable walls, the front roof, and the rear wall. The middle of the isolation grooves extends into the soil layer, and the drooping edges of the inner greenhouse film near the gable walls, the front roof, and the rear wall extend into the middle of the isolation grooves to collect dew from the inner greenhouse film.

[0014] Preferably, the isolation groove is a trapezoid with the opening facing upwards or a V-shape with the opening facing upwards.

[0015] Preferably, the inner film is made of polyolefin.

[0016] Compared with existing technologies, the beneficial effects of this utility model are as follows: Compared with traditional support and covering structures for inner greenhouse films, this structure eliminates the complex and time-consuming steel structure welding process. It only uses multiple steel wire ropes and hanging rings to support the inner greenhouse film, resulting in lower cost and higher practicality. Compared with traditional inner greenhouse film covering structures, the steel wire ropes and other structures used in this structure can greatly improve the lighting conditions inside the greenhouse, which is beneficial to plant light. This covering structure uses two inner greenhouse films set at the bottom of the steel wire ropes and in a traction state. There is no frame position interference between the two inner greenhouse films at their corresponding front, gable, and rear wall positions. They can hang down along their corresponding edges to achieve a comprehensive covering and enclosure effect in all four directions of the greenhouse, improving the greenhouse's heat preservation at night. The power component installed here, compared with the existing single retraction and extension structure, can simultaneously achieve the synchronous retraction and extension of the two inner greenhouse films, with short retraction and extension time and high overall efficiency. Attached Figure Description

[0017] Figure 1 A schematic diagram of the inner membrane covering structure for a greenhouse, provided as an embodiment of this utility model, from the right side view.

[0018] Figure 2 A schematic diagram of the inner membrane covering structure of a greenhouse in a partially closed state, provided as an embodiment of this utility model;

[0019] Figure 3 A schematic diagram of the inner membrane covering structure of a greenhouse in a partially closed state, provided as an embodiment of this utility model;

[0020] Figure 4 A schematic diagram of the inner membrane covering structure for a greenhouse during the closure of the inner membrane, as shown in the front view, provided for an embodiment of this utility model.

[0021] Figure 5 A top-view structural diagram of the first fixed pulley in an inner membrane covering structure for a greenhouse, provided as an embodiment of this utility model;

[0022] Figure 6 for Figure 1 A magnified view of part A in the middle.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Inner greenhouse film; 2. Outer greenhouse film; 3. Gable wall; 4. Front roof; 5. Rear wall; 6. Steel wire rope; 7. Hanging ring; 8. Hook; 9. Power unit; 91. Push rod; 921. Roller bar; 922. First fixed pulley; 923. Motor; 924. Power rope; 10. Isolation groove; 11. Second fixed pulley; 12. Third fixed pulley. Detailed Implementation

[0025] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the technical solution of this utility model and simplifying 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 utility model.

[0027] refer to Figure 1 , Figure 4 and Figure 5 This utility model provides an inner film covering structure for a greenhouse, including a frame connected between two gable walls 3 and two inner greenhouse films 1 symmetrically suspended below the frame. The sides of the two inner greenhouse films 1 near the bottom of their respective gable walls 3 hang down and contact the ground. The film body of the inner greenhouse films 1 near the top of their respective gable walls 3 is fixed to the frame. The edges of the two inner greenhouse films 1 that are close to each other are slidably connected to the frame. A power assembly 9 is connected to the inner greenhouse films 1 to drive the opposite sides of the two inner greenhouse films 1 to move closer or further apart. The frame includes multiple water... A horizontally extending steel wire rope 6 has two ends fixedly connected to two gable walls 3 respectively. Each steel wire rope 6 is slidably connected to multiple hooks 8, which hook the inner greenhouse film 1. The inner greenhouse film 1 is close to the top of the corresponding gable wall 3 and the steel wire rope 6. It also includes two horizontally arranged push rods 91, which are fixedly connected to the edges of the two inner greenhouse films 1 that are close to each other. The upper end of the hook 8 is slidably connected to the steel wire rope through a hanging ring 7. The power component 9 drives the two push rods 91 to move the two inner greenhouse films 1.

[0028] Specifically, the inner greenhouse film 1 hangs down to the ground along the edges of the front roof 4, the back wall 5, and the gable wall 3 adjacent to the greenhouse. When the two inner greenhouse films 1 move toward each other and come into contact along their edges, the interior of the inner greenhouse film 1 is isolated from the exterior.

[0029] In the above embodiments, compared with the traditional support and covering structure for the inner greenhouse film 1, this structure eliminates the complex and time-consuming steel structure welding process. It only uses multiple steel wire ropes 6 and hanging rings 7 to achieve the hanging and support of the inner greenhouse film 1, which is lower in cost and more practical. Moreover, compared with the specific covering structure of the traditional inner greenhouse film 1, this covering structure uses two inner greenhouse films 1, both of which are set at the bottom of the steel wire ropes 6 and are in a traction state. The two inner greenhouse films 1 are not subject to the positional interference of the frame at their corresponding front roof 4, gable wall 3 and rear wall 5 positions, and can utilize their corresponding The drooping edges provide comprehensive coverage of all four sides of the greenhouse, improving its insulation. Furthermore, existing steel frames are complex and densely packed, causing severe shading under projection and hindering plant light intake. This new structure, with its steel wire ropes 6 and other components, significantly improves lighting conditions inside the greenhouse, benefiting plant growth. The power unit 9, compared to existing single-layer structures, enables simultaneous opening and closing of both inner greenhouse films 1, resulting in shorter opening and closing times and higher overall efficiency.

[0030] like Figure 2 and Figure 3 As shown, in order to make the structure of the power component 9 clear, the inner canopy membrane 1 near the two sides of the gable wall is not set to hang down. In actual application, it will extend downward.

[0031] Further, refer to Figure 1 , Figure 4 , Figure 5 and Figure 6The power assembly 9 includes: a winch 921, multiple first fixed pulleys 922, and multiple power ropes 924. The winch 921 is horizontally rotatably connected to the first gable wall 3, and the axis of the winch 921 is perpendicular to the wire rope 6. The winch 921 is driven by a motor 923, the housing of which is fixedly connected to the gable wall 3. The multiple first fixed pulleys 922 are rotatably connected to the second gable wall 3. The axles of the first fixed pulleys 922 extend vertically and are higher than the inner film 1. The multiple power ropes 924 are all connected to the winch 921 and are evenly distributed along the axial direction of the winch 921. The first end of each power rope 924 is fixedly connected to one side of the winch 921, and the second end extends horizontally towards the first fixed pulley 922, passes around the first fixed pulley 922, and is fixedly connected to the winch 921. The second end of the power rope 924 is located on the opposite side of the first end, near the first gable wall 3. The push rods 91 on each of the two push rods are fixedly connected to the power ropes 924 before each of the first fixed pulleys 922. The push rods 91 near the second gable wall 3 are fixedly connected to the power ropes 924 after each of the first fixed pulleys 922. Specifically, the motor 923 realizes the forward and reverse rotation of the winding rod 921 through a transmission structure. In this embodiment, the transmission structure is preferably a reducer, which can adaptively reduce the high-speed rotation of the motor 923 and transmit low-speed, stable output power to the winding rod 921. Of course, the output shaft of the motor 923 and the input shaft of the reducer can also be equipped with pulleys, and the two pulleys can further achieve a more stable power output effect through the winding of the belt. This embodiment does not make specific limitations. Furthermore, the first fixed pulley 922 can also be axially horizontally extended. The specific configuration depends on the actual application, as long as it can smoothly transmit the turning direction of the power rope 924.

[0032] like Figure 5As shown, considering that the coiled steel and motor 923 require maintenance and replacement, it would be inconvenient to maintain if the coiled steel and the first fixed pulley 922 were at the same height. Therefore, in this embodiment, the preferred height of the coiled bar 921 is half the height of the right gable wall 3. Considering that the power rope 924 needs to turn and maintain the same height as the first fixed pulley 922, the first gable wall 3 is located above the coiled bar 921 and is equipped with second fixed pulleys 11 corresponding to the number and position of each first fixed pulley 922. At this time, the second end of the power rope 924 is first extended upward to the second fixed pulley 11, and then after passing around the second fixed pulley 11, it can be extended horizontally to one side of the first fixed pulley 922. At the same time, considering that the power rope 924 returns to the coiled bar after passing around the first fixed pulley 922, When 921 is fixed, it also needs to make a 90° downward turn. Therefore, a third fixed pulley 12 is set so that the power rope 924, which has passed the first fixed pulley 922, passes the third fixed pulley 12 and finally extends downward to be fixed to the coil bar 921. When the coil bar 921 rotates counterclockwise, the power rope 924 that passes the third fixed pulley 12 will move downward and be wound into the coil bar 921. The opposite power rope 924 will be released as the coil bar 921 rotates and move towards the second fixed pulley 11, thus forming a closed loop movement. Since the two inner membranes 1 are connected to the power ropes 924 that move in different directions through the push rod 91, the two inner membranes 1 move towards each other, thus completing the isolation effect of the inner membranes 1.

[0033] In the above embodiments, the lever 921 can simultaneously retract one end of multiple power ropes 924 and release the other. The first fixed pulley 922 can rotate the power ropes 924. When the lever 921 rotates in the reverse direction, the upward-facing portion of the power rope 924 on the right side of the lever 921 will be released, while the power rope 924 on the left side of the lever 921 will be retracted. This causes the direction of the power rope 924 gradually approaching the second gable wall 3 to be opposite to the direction of movement towards the first gable wall 3 where the lever 921 is installed. By relying on the left and right push rods 91 respectively fixed to the opposite edges of the left and right inner membranes 1, the two inner membranes 1 can move towards each other and finally achieve contact isolation. When the lever 921 rotates in the forward direction, the two inner membranes 1 can move away from each other, thereby achieving the opening effect.

[0034] Furthermore, considering that the process of the two inner films 1 approaching and contacting each other along their opposite edges may require constant manual monitoring, conventional distance sensors are set on the opposite edges of the two inner films 1 or on the push rod 91. The motor 923 is automatically controlled to stop by signal transmission. This method is an optimized solution in this embodiment. Its technology belongs to existing conventional means and is only proposed as a direction for optimization. This embodiment does not make specific limitations.

[0035] This structure is easy to control, freeing up manpower. It eliminates the need for tedious operations such as manually observing whether the membrane is in place and then starting and stopping the motor 923 during the opening and closing process.

[0036] By operating the system, the inner greenhouse film 1 can be closed during the day when there is sufficient sunlight, allowing the crops inside the greenhouse to receive ample sunlight. When there is insufficient sunlight at night, the inner greenhouse film 1 can be opened in time. When keeping warm at night, the two inner greenhouse films 1 can be closed, which can basically keep the temperature inside the greenhouse above 10℃ in winter.

[0037] Further, refer to Figure 2 and Figure 3 The spacing of each steel wire rope 6 from the rear wall 5 to the front roof 4 is the same. When the two inner canopy membranes 1 are close together, the top membrane of the inner canopy membrane 1 is in a taut and stretched state.

[0038] In the above embodiments, by limiting the top film of the inner film 1 to be taut and stretched when the two inner films 1 are close together, it is possible to avoid the inner film 1 between two adjacent steel wire ropes 6 being concave, which is not only unsightly, but also prone to accumulating dust and mist.

[0039] Further, refer to Figure 1 The height of the inner greenhouse film 1 near the rear wall 5 is higher than the height of the film near the front roof 4. The top film of the inner greenhouse film 1 near the rear wall 5 is set horizontally, and the top film of the inner greenhouse film 1 near the front roof 4 is inclined downward. The spacing between each wire rope 6 and the inner greenhouse film 1 is the same.

[0040] In the above embodiments, by defining the structure of its inner membrane 1, it can be compatible with the conventional arched gable wall 3.

[0041] Further, refer to Figure 4 The upper surface of the inner film 1 is provided with hanging holes corresponding to each hook, and the hook part of the hook is hung in the hanging hole.

[0042] Further, refer to Figure 1 Isolation trenches 10 are installed on the ground inside the greenhouse near the two gable walls 3, the front roof 4 and the rear wall 5. The middle part of the isolation trenches 10 extends into the soil layer. The drooping edges of the inner greenhouse film 1 near the gable walls 3, the front roof 4 and the rear wall 5 extend into the middle of the isolation trenches 10 to collect the dew of the inner greenhouse film 1. The accumulated dew can be used to form an isolation liquid.

[0043] In the above embodiments, the drooping edge of the inner canopy membrane 1 adjacent to the front roof 4 is referred to as the front drooping membrane, and the drooping edge of the inner canopy membrane 1 of the rear wall 5 is referred to as the front drooping membrane. The height of the front drooping membrane is less than the height of the rear drooping membrane, and the two extend into the isolation groove 10 to the same depth. Water injection can ensure the sealing. At the same time, when the two inner canopy membranes 1 are opened or close to each other, their edges will always rub against the ground. Therefore, this design can ensure the sealing of the front and rear drooping membranes during movement. Since they are in contact with water, it can also avoid the frequent friction between the front and rear drooping membranes and the ground, which would reduce their lifespan, and ultimately ensure the isolation and sealing.

[0044] Further, refer to Figure 1 The isolation trough 10 is in the shape of a trapezoid with the opening facing upward or a V-shape with the opening facing upward. In this embodiment, it is preferably trapezoidal. The isolation trough 10 is set on the land inside the greenhouse.

[0045] Meanwhile, considering that when there is a large temperature difference between day and night, a layer of water mist may adhere to the surface of the inner film 1, which may accumulate and form water droplets, the isolation tank 10 designed in this way can collect these water droplets. In addition, this embodiment also provides an additional solution: a drain pipe can be set above the normal sealing liquid level in the isolation tank 10. After the water droplets are collected, the water in the isolation tank 10 can be prevented from filling up. At the same time, this idea and solution are based on this embodiment and are designed to eliminate the need for manual addition of isolation water to the isolation tank 10, and the evaporation problem of the isolation water in the isolation tank 10 is not considered.

[0046] Further, refer to Figure 1 The inner film 1 is made of polyolefin.

[0047] In the above embodiments, by limiting the material of the inner film 1 to polyolefin (PO), compared with the traditional PE material film, it has the characteristics of better light transmittance, better anti-fogging and anti-drip effect, tensile strength, better antistatic performance and longer service life due to the use of nanotechnology.

[0048] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. An inner membrane covering structure for a greenhouse, characterized in that, The system includes a frame connected between two gable walls (3) and two inner membranes (1) symmetrically suspended below the frame. The two inner membranes (1) hang down along their edges near the bottom of the corresponding gable wall (3) and contact the ground. The membrane of the inner membrane (1) near the top of the corresponding gable wall (3) is fixed to the frame. The edges of the two inner membranes (1) that are close to each other are slidably connected to the frame. A power component (9) is connected to the inner membrane (1) to drive the opposite sides of the two inner membranes (1) to move closer to each other or further away from each other. The frame includes multiple horizontally extending steel wire ropes (6), the two ends of which are fixedly connected to the two gable walls (3) respectively. Each steel wire rope (6) is slidably connected with multiple hooks (8), which hook the inner greenhouse film (1). The inner greenhouse film (1) is close to the top of the corresponding gable wall (3) and the steel wire rope (6).

2. The inner membrane covering structure for a greenhouse as described in claim 1, characterized in that, It also includes two horizontally arranged push rods (91), which are respectively fixed to the two inner films (1) close to each other along their edges. The upper end of the hook (8) is slidably connected to the wire rope through the hanging ring (7). The power component (9) drives the two push rods (91) to move the two inner films (1).

3. The inner membrane covering structure for a greenhouse as described in claim 2, characterized in that, The power assembly (9) includes: The reel (921) is horizontally rotatably connected to the first gable wall (3). The axis of the reel (921) is perpendicular to the wire rope (6). The reel (921) is driven by a motor (923). The housing of the motor (923) is fixedly connected to the gable wall (3). Multiple first fixed pulleys (922) are rotatably connected to the second gable wall (3). The axle of the first fixed pulley (922) extends vertically and is higher than the inner greenhouse film (1). Multiple power ropes (924) are connected to the coil bar (921). The multiple power ropes (924) are evenly distributed along the axial direction of the coil bar (921). The first end of the power rope (924) is fixed to one side of the coil bar (921), and the second end is fixed to the coil bar (921) after passing over the first fixed pulley (922). The second end of the power rope (924) is located on the opposite side of the first end. The push rods (91) near the first gable wall (3) are all fixed to the power ropes (924) before they are wound around the first fixed pulleys (922). The push rods (91) near the second gable wall (3) are all fixed to the power ropes (924) after they are wound around the first fixed pulleys (922).

4. The inner membrane covering structure for a greenhouse as described in claim 1, characterized in that, The spacing between each of the steel wire ropes (6) from the rear wall (5) to the front house (4) is the same. When the two inner membranes (1) are close together, the top membrane of the inner membrane (1) is in a taut and stretched state.

5. The inner membrane covering structure for a greenhouse as described in claim 4, characterized in that, The height of the inner greenhouse film (1) near the rear wall (5) is higher than the height of the film near the front roof (4). The top film of the inner greenhouse film (1) near the rear wall (5) is horizontally set. The top film of the inner greenhouse film (1) near the front roof (4) is inclined downward. The spacing between each wire rope (6) and the inner greenhouse film (1) is the same.

6. The inner membrane covering structure for a greenhouse as described in claim 1, characterized in that, The upper surface of the inner film (1) is provided with hanging holes corresponding to each of the hooks (8), and the hooks of the hooks (8) are hung in the hanging holes.

7. The inner membrane covering structure for a greenhouse as described in claim 1, characterized in that, Isolation grooves (10) are provided on the ground near the two gable walls (3), the front house (4) and the back wall (5) of the greenhouse. The middle part of the isolation grooves (10) extends into the soil layer. The drooping edge of the inner greenhouse film (1) near the gable walls (3), the front house (4) and the back wall (5) extends into the middle of the isolation grooves (10) to collect the dew of the inner greenhouse film (1).

8. The inner membrane covering structure for a greenhouse as described in claim 7, characterized in that, The isolation groove (10) is a trapezoid with the opening facing upward or a V-shape with the opening facing upward.

9. The inner membrane covering structure for a greenhouse as described in claim 1, characterized in that, The inner membrane (1) is made of polyolefin.

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