Mechanical large-span plastic greenhouse suitable for crop rotation of artemisia and rice

Abstract

The utility model relates to the technical field of plastic greenhouse structures, in particular to a mechanical large-span plastic greenhouse suitable for artemisia and rice rotation. The large rise span ratio is achieved, the environment uniformity is good, and meanwhile the land utilization rate is increased; the effective operation space in the plastic greenhouse is increased, and the requirement of crop production for realizing comprehensive and whole-process mechanization is met; oval steel pipes with higher strength are selected as structural materials and matched with an inner stand column structure, and the wind and snow load resistance of the structure is improved. The shed door facilitates entering and exiting and turning around of the agricultural machine, and the land utilization rate is increased; a zigzag ventilation structure is adopted, and ventilation openings are formed in the periphery of the plastic greenhouse, so that the ventilation area is large, and the cooling and dehumidifying effects in summer are good; the structure is low in manufacturing cost, easy to assemble and suitable for popularization. Comprising a shed body structure and a foundation (4), a covering is arranged on the upper surface of the shed body structure, and the shed body structure comprises a main arch supporting structure, an auxiliary arch supporting structure, shed head stand columns (2), inclined struts (5), shed head horizontal pull rods (7) and clamping grooves (11).

Description

TECHNICAL FIELD

[0001] The utility model relates to a plastic greenhouse structure technical field, concretely relates to a suitable machineable large span plastic greenhouse for rotation of chervil and rice. BACKGROUND

[0002] At present, the chervil production greenhouse has many problems such as old facilities, simple materials, small space, inconvenient production management, poor heat preservation and lighting, poor ventilation, low machineability and low wind resistance, which further limit the growth level and yield of chervil and rice.

[0003] In view of the above problems, the utility model satisfies the agronomic planting demand of chervil and rice, combines the requirement of plastic greenhouse planting mechanization, optimizes the plastic greenhouse structure, improves the structural stability, and designs a new machineable large span plastic greenhouse. SUMMARY

[0004] The utility model provides a suitable machineable large span plastic greenhouse for rotation of chervil and rice, has greater vector span ratio, better environmental uniformity, improves land utilization ratio simultaneously, increases the effective operation space inside plastic greenhouse, satisfies the demand that crop production realizes overall mechanization, structural material selects higher strength elliptical steel pipe, is matched with inner stand structure, increases the wind, snow load capacity of structure, the design of shed door is convenient for the entry and exit and the turning of agricultural machinery, improves land utilization ratio, adopts sawtooth ventilation structure, and the ventilation opening is arranged around plastic greenhouse simultaneously, and the ventilation area is big, and the summer cooling, damp effect is good, and the structural cost is lower, and assembly is simple, and it is suitable for promotion.

[0005] The technical solution of the utility model is as follows:

[0006] A suitable machineable large span plastic greenhouse for rotation of chervil and rice, wherein, the machineable large span plastic greenhouse includes shed body structure, foundation 4, the upper surface of shed body structure is equipped with mulch, and the shed body structure includes main arch support structure, vice arch support structure, shed head stand 2, inclined brace 5, shed head horizontal pull rod 7 and clamping groove 11;

[0007] The foundation 4 is the ground or spiral ground bolt, and is connected with the lower end of arch 1;

[0008] The main arch support structure includes multiple groups of arch 1, longitudinal pull rod 3, support rod 13, inner stand 12 and inner stand longitudinal pull rod 14;

[0009] Single group of arch 1 includes left side arch rod and right side arch rod, and the bottom end of left side arch rod and right side arch rod is fixed with foundation 4, and the top end of left side arch rod and right side arch rod is connected to form complete arch structure;

[0010] The middle part of the left and right arch poles of the plurality of sets of arch frames 1 is bent, a left and right support section is formed below the bent part, and a left and right roof section is formed above the bent part, and the included angle between the roof section and the ground is smaller than the included angle between the support section and the ground;

[0011] The inner column 12 is vertically arranged at the middle position of the plurality of sets of arch frames 1, the bottom end of the inner column 12 is connected with the base 4, and the top end is connected with the arch frame 1;

[0012] The auxiliary arch support structure includes the plurality of sets of arch frames 1 and the longitudinal pull rod 3;

[0013] The main arch support structure is arranged in parallel along the longitudinal direction of the shed body structure from both ends of the shed body structure, and a plurality of auxiliary arch support structures parallel to the main arch support structure are arranged between the two main arch support structures;

[0014] The longitudinal pull rod 3 is arranged below the arch frame 1 and connected with the arch frame 1, arranged horizontally along the longitudinal direction, and across both ends of the shed body structure;

[0015] The inner column longitudinal pull rod 14 is arranged horizontally along the longitudinal direction and connected with the support pole 13 and the inner column 12;

[0016] The support pole 13 is arranged at both ends of the shed body structure and the main arch support structure, the bottom end of the support pole 13 is connected with the inner column longitudinal pull rod 14, and the top end of the support pole 13 is connected with the arch frame 1;

[0017] Two shed head horizontal pull rods 7 are arranged horizontally at both ends of the shed body structure, and the two ends of the shed head horizontal pull rod 7 are connected with the arch frame 1;

[0018] Seven shed head columns 2 are arranged vertically and uniformly at both ends of the shed body structure, the bottom end of the shed head column 2 is connected with the base 4, and the top end is connected with the arch frame 1;

[0019] The seven shed head columns 2 form eight shed doors 6, wherein the left and right shed doors 6 are formed by the support section and the roof section of the arch frame 1, the shed head column 2, the shed head horizontal pull rod 7 and the ground, and the six middle shed doors 6 are formed by the shed head column 2, the shed head horizontal pull rod 7 and the ground;

[0020] The inclined support 5 is arranged at both ends and the middle part of the shed body structure, the top end of the inclined support 5 is connected with the inner column longitudinal pull rod 14, and the bottom end of the inclined support 5 is connected with the bottom end of the inner column 12;

[0021] The two ends of the clamping groove 11 are fixedly connected with the support section and the roof section of the arch frame 1;

[0022] The clamping groove 11 fixedly connected with the support section of the arch 1 comprises an upper clamping groove of the support section and a lower clamping groove of the support section; the upper clamping groove of the support section and the lower clamping groove of the support section are arranged in parallel along the longitudinal direction of the plastic greenhouse; the upper clamping groove of the support section and the lower clamping groove of the support section are provided with the film rolling rod 10 therebetween; the upper clamping groove of the support section, the lower clamping groove of the support section and the film rolling rod 10 together constitute the two-side ventilation opening 9; the two-side ventilation opening 9 is opened and closed by moving the film rolling rod 10 between the upper clamping groove of the support section and the lower clamping groove of the support section.

[0023] The clamping groove 11 fixedly connected with the roof section of the arch 1 comprises an upper clamping groove of the roof section and a lower clamping groove of the roof section; the upper clamping groove of the roof section and the lower clamping groove of the roof section are arranged in parallel along the longitudinal direction of the plastic greenhouse; the upper clamping groove of the roof section and the lower clamping groove of the roof section are provided with the film rolling rod 10 therebetween; the upper clamping groove of the roof section, the lower clamping groove of the roof section and the film rolling rod 10 together constitute the top vertical ventilation opening 8; the top vertical ventilation opening 8 is opened and closed by moving the film rolling rod 10 between the upper clamping groove of the roof section and the lower clamping groove of the roof section.

[0024] The lap joint sleeve of the arch 1 is connected with the fixing member; the shed head horizontal pull rod 7 is connected with the shed head stand 2, the longitudinal pull rod 3 is connected with the arch 1, and the arch 1 is connected with the inclined support 5 by the combination of the hoop and the compression spring.

[0025] Among them, the suitable machine large-span plastic greenhouse for the rotation of artemisia and rice has a greenhouse span of 16 m, a length of 40-60 m, an arch distance of 1 m, a shoulder height of 2 m, and a ridge height of 5.5 m.

[0026] Among them, the suitable machine large-span plastic greenhouse for the rotation of artemisia and rice has a greenhouse span of 16 m, a length of 40-60 m, an arch distance of 1 m, a shoulder height of 2 m, and a ridge height of 5.5 m.

[0027] Among them, the width of the shed door 6 is 2 m, and the height is 3 m.

[0028] Among them, the covering on the outside of the shed structure adopts a scattering light PO film; the lower clamping groove of the support section of the two-side ventilation opening 9 has a width of 3 cm and a vertical height of 30 cm.

[0029] Among them, the length of the two-side ventilation opening 9 is 58 m, and the maximum width is 1.5 m.

[0030] Among them, the lower clamping groove of the roof section of the top vertical ventilation opening 8 is 10 cm away from the arch 1, the width of the lower clamping groove of the roof section is 3 cm, the length of the top vertical ventilation opening 8 is 56 m, and the maximum width is 0.8 m.

[0031] Among them, the distance between the two adjacent groups of main arch support structures is four meters.

[0032] Among them, three groups of auxiliary arch support structures are arranged between every two groups of main arch support structures.

[0033] The beneficial technical effects of the present application are:

[0034] First, it has a large span-to-span ratio, good environmental uniformity, and improved land utilization.

[0035] Second, it increases the effective working space inside the plastic greenhouse, meeting the needs of achieving full mechanization of crop production.

[0036] Third, the structural material is selected to be a higher strength elliptical steel pipe, which is combined with the column structure to increase the structure's resistance to wind and snow loads.

[0037] Fourth, the design of the greenhouse door facilitates the entry, exit, and turning of agricultural machinery, thereby improving land utilization.

[0038] Fifth, the greenhouse adopts a sawtooth ventilation structure, and ventilation openings are set on all four sides of the plastic greenhouse, resulting in a large ventilation area and good cooling and dehumidification effects in summer;

[0039] VI. This structure has a low cost, is easy to assemble, and is suitable for widespread adoption. Attached Figure Description

[0040] Fig. 1 This is the front elevation view of the structure of this utility model;

[0041] Fig. 2 This is the left elevation view of the structure of this utility model;

[0042] Fig. 3 This is a schematic diagram of the overall structure of the plastic greenhouse of this utility model.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 1. Arch frame 2. Canopy end support column

[0045] 3. Longitudinal tie rods 4. Foundation

[0046] 5. Diagonal bracing 6. Shed door

[0047] 7. Horizontal tie rod at the canopy end; 8. Vertical ventilation opening at the top.

[0048] 9. Ventilation openings on both sides 10. Film rolling rod

[0049] 11. Card slot; 12. Inner column

[0050] 13. Support rod; 14. Inner column longitudinal tie rod Detailed Implementation

[0051] like Figs. 1-3 As shown, a mechanized large-span plastic greenhouse suitable for rice-grass rotation includes a greenhouse structure and a foundation 4. The upper surface of the greenhouse structure is covered with a covering. The greenhouse structure includes a main arch support structure, a secondary arch support structure, a greenhouse head column 2, a diagonal brace 5, a greenhouse head horizontal tie rod 7, and a slot 11.

[0052] The base 4 is the ground or a screw bolt connected to the lower end of the arch 1.

[0053] The main arch support structure comprises multiple sets of arches 1, longitudinal pull rods 3, support rods 13, inner columns 12 and inner column longitudinal pull rods 14.

[0054] A single set of arches 1 comprises left and right arch rods, the bottom ends of which are fixed to the base 4, and the top ends of which are connected to form a complete arch structure.

[0055] The middle part of the left and right arch rods of the multiple sets of arches 1 is bent, forming left and right support sections below the bent part and left and right ceiling sections above the bent part, the included angle between the ceiling section and the ground being smaller than that between the support section and the ground.

[0056] The inner columns 12 are vertically arranged at the middle position of the multiple sets of arches 1. The bottom ends of the inner columns 12 are connected to the base 4, and the top ends are connected to the arches 1.

[0057] The secondary arch support structure comprises multiple sets of arches 1 and longitudinal pull rods 3.

[0058] The main arch support structure is arranged longitudinally and parallelly along the shed body structure from both ends of the shed body structure, and multiple sets of secondary arch support structures parallel to the main arch support structure are arranged between the two main arch support structures.

[0059] Preferably, the distance between the two adjacent main arch support structures is four meters.

[0060] Preferably, three sets of secondary arch support structures are arranged between the two main arch support structures.

[0061] The longitudinal pull rods 3 are arranged horizontally along the longitudinal direction below and connected to the arches 1, and span the two ends of the shed body structure.

[0062] The inner column longitudinal pull rods 14 are arranged horizontally along the longitudinal direction and connected to the support rods 13 and the inner columns 12.

[0063] The support rods 13 are arranged at the two ends of the shed body structure and the main arch support structure. The lower end of the support rod 13 is connected to the inner column longitudinal pull rod 14, and the upper end of the support rod 13 is connected to the arch 1.

[0064] Two shed head horizontal pull rods 7 are arranged horizontally at each end of the shed body structure, and the two ends of the shed head horizontal pull rod 7 are connected to the arch 1.

[0065] Seven shed head columns 2 are arranged vertically and uniformly at each end of the shed body structure. The bottom end of the shed head column 2 is connected to the base 4, and the top end is connected to the arch 1.

[0066] Seven end columns 2 form eight shed doors 6. The shed doors 6 on the left and right sides are composed of the supporting section of the arch frame 1, the end columns 2, the horizontal tie rods 7, and the ground, while the six shed doors 6 in the middle are composed of the end columns 2, the horizontal tie rods 7, and the ground.

[0067] During production, the film at greenhouse door 6 is rolled up, and the machine can operate in an "S" or "U" shape, turning around outside the plastic greenhouse and entering and exiting the plastic greenhouse through greenhouse door 6, which enhances the continuity of machine operation and saves land resources.

[0068] The diagonal braces 5 are respectively installed at both ends and the middle of the canopy structure. The top of the diagonal brace 5 is connected to the longitudinal tie rod 14 of the inner column, and the bottom of the diagonal brace 5 is connected to the bottom of the inner column 12.

[0069] The two ends of the slot 11 are fixedly connected to the support section and the roof section of the arch frame 1.

[0070] The slot 11, which is fixedly connected to the support section of the arch frame 1, includes an upper slot and a lower slot. The upper and lower slots are arranged parallel to each other along the longitudinal direction of the plastic greenhouse. A film-rolling rod 10 is provided between the upper and lower slots. The upper and lower slots, together with the film-rolling rod 10, form ventilation openings 9 on both sides. The ventilation openings 9 on both sides are opened and closed by moving the film-rolling rod 10 between the upper and lower slots.

[0071] The slot 11, which is fixedly connected to the roof section of the arch frame 1, includes an upper slot and a lower slot. The upper and lower slots are arranged parallel to each other along the longitudinal direction of the plastic greenhouse. A film-rolling rod 10 is provided between the upper and lower slots. The upper and lower slots, together with the film-rolling rod 10, constitute the top vertical ventilation opening 8. The top vertical ventilation opening 8 is opened and closed by moving the film-rolling rod 10 between the upper and lower slots.

[0072] During summer production, the top vertical vent 8 and the side vents 9 are always kept open; during winter production, the top vertical vent 8 or the side vents 9 are closed as needed to increase the insulation performance of the plastic greenhouse.

[0073] The arch frame 1 is connected using sleeves and fasteners. The horizontal tie rod 7 at the canopy end is connected to the canopy end column 2, the longitudinal tie rod 3 is connected to the arch frame 1, and the arch frame 1 is connected to the diagonal brace 5 using clamps and top springs.

[0074] Preferably, the span of the mechanized large-span plastic greenhouse suitable for rice-grass rotation is 16m, the length is 40-60m, the arch spacing is 1m, the shoulder height is 2m, and the ridge height is 5.5m.

[0075] Preferably, in order to optimize the wind resistance of the structure, the angle between the support section of the arched frame at both ends of the mechanized large-span plastic greenhouse suitable for rice-rape rotation and the ground is 80°, which can reduce the wind pressure on the greenhouse to a certain extent.

[0076] Preferably, the width of the shed door 6 is 2 m and the height is 3 m. Preferably, the roof vertical pull rod 7, the vertical column 2, the longitudinal pull rod 3 and the arched frame 1, the arched frame 1 and the inclined brace 5 are reinforced by using reinforcing bars or welding.

[0077] Preferably, when the foundation 4 is land, the bottom end of the arched frame 1 is inserted into the ground by 0.8 m.

[0078] Preferably, when the foundation 4 is a spiral ground bolt, a high-strength spiral ground bolt is used as the foundation fixing method, and a flange plate is used to connect the upper arched frame 1. The specific arrangement is that two spiral ground bolts are arranged every three arched frames from the roof, and the remaining parts are fixed by inserting into the soil, and the vertical column uses a spiral ground bolt for fixation.

[0079] Preferably, the ground bolt at the roof is buried to a depth of 150 cm, and the remaining positions are buried to a depth of 80 cm.

[0080] Preferably, the covering on the outside of the greenhouse structure adopts a light scattering PO film. The width of the lower clamping groove of the support section of the two side vents 9 is 3 cm, and the vertical height is 30 cm, in order to reduce the adverse effects of lodging caused by strong wind damage to the fennel. Preferably, the length of the two side vents 9 is 58 m, and the maximum width is 1.5 m. The opening and closing degree is controlled by the film rolling rod 10, and a larger ventilation area can effectively regulate the indoor environment, which is more conducive to cooling and dehumidifying in summer production.

[0081] Preferably, the top vertical vent 8 has a top cover section lower clamping groove that is 10 cm away from the arched frame 1, and the width of the top cover section lower clamping groove is 3 cm. The length of the top vertical vent 8 is 56 m, and the maximum width is 0.8 m. The opening and closing degree is controlled by the film rolling rod 10, which can effectively cool and dehumidify in summer production, and is convenient for dealing with areas with abundant rainfall, ensuring normal ventilation in the rainy season.

[0082] The support structure is made of Q235B steel, and the quality meets the current national standard "Carbon Structural Steel" GB / T 700. The arched frame 1 is made of an oval galvanized steel pipe with an outer diameter of 55*30 mm and a wall thickness of 2.0 mm. The roof vertical column 2, the inner vertical column 12 and the roof horizontal pull rod 7 are made of a rectangular steel pipe with a wall thickness of 2.5 mm and a size of 90*55 mm. The inclined brace 5 is made of a galvanized steel pipe with a diameter of 32 mm and a wall thickness of 2.0 mm. The longitudinal pull rod 3 at the ridge is made of an oval galvanized steel pipe with an outer diameter of 90*55 mm and a wall thickness of 2.0 mm. The inner vertical column longitudinal pull rod 14 is made of an oval galvanized steel pipe with an outer diameter of 55*30 mm and a wall thickness of 2.0 mm. The remaining longitudinal pull rods 3 are made of a galvanized steel pipe with a diameter of 32 mm and a wall thickness of 2.0 mm.

[0083] The working process of the utility model is:

[0084] The plastic greenhouse adopts assembly structure, when erecting, first, the screw ground bolt is fixed in the soil through the matched appliance. Then, the inner stand 12 and the arch frame 1 are installed, the inner stand 12 and the left and right arch rod lower end are fixed on the base 4, and the upper end is fixed through the mode of using sleeve and fixing part. Then, the longitudinal pull rod 3 is fixed on the arch frame 1 through the matched fixing part; the inner stand longitudinal pull rod 14 is connected with the inner stand 12; the shed head horizontal pull rod 7 is fixed on the arch frame 1 at both ends of the shed body structure; the shed head stand 2 is fixed at both ends of the shed body structure, the lower end is connected with the base 4, and the upper end is connected with the shed head horizontal pull rod 7 and the arch frame 1 respectively; the support rod 13 lower end is connected with the shed head horizontal pull rod 7, and the upper end is connected with the arch frame 1; the inclined support 5 is connected with the inner stand 12. Then, the clamping groove 11 is fixed on the arch frame 1 respectively, the plastic greenhouse is covered and fixed, and the clamping groove 11 and the film rolling rod 10 respectively constitute two side ventilation openings 9 and top vertical ventilation opening 8.

[0085] In daily management, the environment is adjusted mainly through the natural ventilation of the plastic greenhouse. The natural ventilation is realized by the two side ventilation openings 9 and the top vertical ventilation opening 8. The size of each ventilation opening is adjusted through the film rolling rod 10: the two side ventilation openings 9 and the top vertical ventilation opening 8 keep open state in the daytime, which plays a good role in cooling and dehumidification; the top vertical ventilation opening 8 is closed at night, and the opening and closing degree of the two side ventilation openings 9 is selected according to the temperature, so that a good growth environment is provided for crops.

[0086] When producing, the shed film at the shed door 6 is rolled up, the agricultural machine enters from the leftmost or rightmost shed door 6, and works according to the "S" shape or "back" shape, turns around outside the plastic greenhouse, repeatedly enters and exits the plastic greenhouse, reduces the turning around times in the agricultural machine work, strengthens the coherence of the machine work, and saves the land resources.

Claims

1. A large-span plastic greenhouse suitable for rice-rice rotation, characterized in that: The utility model provides a machineable large-span plastic greenhouse, which comprises a greenhouse body structure, a foundation (4), and a covering arranged on the upper surface of the greenhouse body structure, wherein the greenhouse body structure comprises a main arch support structure, a secondary arch support structure, a shed head vertical column (2), an inclined brace (5), a shed head horizontal pull rod (7) and a clamping groove (11). The foundation (4) is connected with the lower end of the arch frame (1) and is a ground or a spiral ground bolt. The main arch support structure comprises a plurality of groups of arch frames (1), longitudinal pull rods (3), support rods (13), inner vertical columns (12) and inner vertical column longitudinal pull rods (14). Each group of arch frames (1) comprises a left arch rod and a right arch rod, the bottom ends of the left arch rod and the right arch rod are fixed to the foundation (4), and the top ends of the left arch rod and the right arch rod are connected to form a complete arch structure. The middle portions of the left arch rods and the right arch rods of the plurality of groups of arch frames (1) are bent, left and right support sections are formed below the bent portions, left and right roof sections are formed above the bent portions, and the included angle between the roof sections and the ground is smaller than the included angle between the support sections and the ground. Inner vertical columns (12) are vertically arranged at the middle positions of the plurality of groups of arch frames (1), the bottom ends of the inner vertical columns (12) are connected to the foundation (4), and the top ends of the inner vertical columns (12) are connected to the arch frames (1). The secondary arch support structure comprises a plurality of groups of arch frames (1) and longitudinal pull rods (3). The main arch support structure is arranged in parallel along the longitudinal direction of the greenhouse body structure from both ends of the greenhouse body structure, a plurality of groups of secondary arch support structures are arranged in parallel with the main arch support structure between the two groups of main arch support structures. The longitudinal pull rods (3) are arranged below the arch frames (1) and are connected to the arch frames (1), are arranged in the longitudinal direction and horizontally, and span both ends of the greenhouse body structure. The inner vertical column longitudinal pull rods (14) are arranged in the longitudinal direction and horizontally, and are connected to the support rods (13) and the inner vertical columns (12). The support rods (13) are arranged at both ends of the greenhouse body structure and the main arch support structure, the bottom ends of the support rods (13) are connected to the inner vertical column longitudinal pull rods (14), and the top ends of the support rods (13) are connected to the arch frames (1). Two shed head horizontal pull rods (7) are arranged horizontally at both ends of the greenhouse body structure, and the two ends of the shed head horizontal pull rods (7) are connected to the arch frames (1). Seven shed head vertical columns (2) are arranged vertically and uniformly at both ends of the greenhouse body structure, the bottom ends of the shed head vertical columns (2) are connected to the foundation (4), and the top ends of the shed head vertical columns (2) are connected to the arch frames (1). The seven shed head vertical columns (2) form eight shed doors (6), wherein the shed doors (6) on the left and right sides are formed by the support sections of the arch frames (1), the shed head vertical columns (2), the shed head horizontal pull rods (7) and the ground, and the six shed doors (6) in the middle are formed by the shed head vertical columns (2), the shed head horizontal pull rods (7) and the ground. The inclined braces (5) are arranged at both ends and the middle of the greenhouse body structure, the top ends of the inclined braces (5) are connected to the inner vertical column longitudinal pull rods (14), and the bottom ends of the inclined braces (5) are connected to the bottom ends of the inner vertical columns (12). The two ends of the clamping grooves (11) are fixedly connected to the support sections and the roof sections of the arch frames (1). The clamping groove (11) fixedly connected with the support section of the arch frame (1) comprises an upper support section clamping groove and a lower support section clamping groove; the upper support section clamping groove and the lower support section clamping groove are arranged in parallel along the longitudinal direction of the plastic greenhouse; the upper support section clamping groove and the lower support section clamping groove are provided with a film rolling rod (10) therebetween; the upper support section clamping groove, the lower support section clamping groove and the film rolling rod (10) together constitute a two-side ventilation opening (9); the two-side ventilation opening (9) is opened and closed by moving the film rolling rod (10) between the upper support section clamping groove and the lower support section clamping groove. The clamping groove (11) fixedly connected with the roof section of the arch frame (1) comprises an upper roof section clamping groove and a lower roof section clamping groove; the upper roof section clamping groove and the lower roof section clamping groove are arranged in parallel along the longitudinal direction of the plastic greenhouse; the upper roof section clamping groove and the lower roof section clamping groove are provided with a film rolling rod (10) therebetween; the upper roof section clamping groove, the lower roof section clamping groove and the film rolling rod (10) together constitute a top vertical ventilation opening (8); the top vertical ventilation opening (8) is opened and closed by moving the film rolling rod (10) between the upper roof section clamping groove and the lower roof section clamping groove. The lap joint of the arch frame (1) is connected with the fixing member; the shed head horizontal pull rod (7) is connected with the shed head stand (2) and the longitudinal pull rod (3) is connected with the arch frame (1) through the hoop and the compression spring.

2. The large-span plastic greenhouse suitable for rice-rice rotation according to claim 1, characterized in that: The plastic greenhouse suitable for the rotation of artemisia and rice has a span of 16 m, a length of 40-60 m, an arch distance of 1 m, a shoulder height of 2 m and a ridge height of 5.5 m.

3. The large-span plastic greenhouse suitable for rice-rice rotation according to claim 1, characterized in that: The support section of the arch frame at the two ends of the plastic greenhouse suitable for the rotation of artemisia and rice has an angle of 80° with the ground.

4. The large-span plastic greenhouse suitable for rice-rice rotation according to claim 1, characterized in that: The shed door (6) has a width of 2 m and a height of 3 m.

5. The large-span plastic greenhouse suitable for rice-rice rotation according to claim 1, characterized in that: The covering outside the shed body structure adopts a light scattering PO film; the lower support section clamping groove of the two-side ventilation opening (9) has a width of 3 cm and a vertical height of 30 cm.

6. The large-span plastic greenhouse suitable for rice-rice rotation according to claim 1, characterized in that: The two-side ventilation opening (9) has a length of 58 m and a maximum width of 1.5 m.

7. The large-span plastic greenhouse suitable for rice-rice rotation according to claim 1, characterized in that: The lower roof section clamping groove of the top vertical ventilation opening (8) is 10 cm away from the arch frame (1) and has a width of 3 cm; the top vertical ventilation opening (8) has a length of 56 m and a maximum width of 0.8 m.

8. The large-span plastic greenhouse suitable for rice-rice rotation according to claim 1, characterized in that: The distance between the two adjacent main arch support structures is four meters.

9. The large-span plastic greenhouse suitable for rice-rice rotation according to claim 1, characterized in that: Three groups of auxiliary arch support structures are arranged between every two groups of main arch support structures.

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