Modified large-span plastic greenhouse based on sunlight greenhouse arch frame

Abstract

The utility model relates to a modified large span plastic greenhouse based on a sunlight greenhouse arch frame, which comprises cross beams, a roof arch frame and stand columns, the cross beams comprise an upper cross beam, a lower cross beam, two connecting angle steels and web members for fixedly connecting the upper cross beam and the lower cross beam, and the connecting angle steels are respectively arranged on two sides of the upper cross beam and the lower cross beam. The roof arch frame comprises an arch frame, an upper chord member and a lower chord member, the upper chord member and the lower chord member are obliquely arranged in parallel, the upper end of the upper chord member and the upper end of the lower chord member are connected with the upper end of the arch frame, and the lower end of the upper chord member and the lower end of the lower chord member are connected with the connecting angle steel; the arch frames, the upper chords and the lower chords are symmetrically arranged on the two sides of the cross beam, a T-shaped connecting support is fixedly connected to the upper portion of the upper cross beam and comprises a horizontal supporting rod and a vertical supporting rod which are perpendicularly connected, the two ends of the horizontal supporting rod are connected with the two sets of upper chords respectively, the upper end of the vertical supporting rod is connected with the horizontal supporting rod, and the lower end of the vertical supporting rod is connected with the upper cross beam. The upper end of the stand column is connected with the lower beam, and the lower end of the stand column is arranged on the stand column base. The device is simple in structure and complete in function, the waste sunlight greenhouse roof arch frame is recycled, the construction cost of a large-span plastic greenhouse is reduced, and the development of facility agriculture can be promoted.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of plastic greenhouse construction, especially to the reconstruction of plastic greenhouse, specifically to a kind of large-span plastic greenhouse of retrofit type based on sunlight greenhouse arch. BACKGROUND

[0002] As a common facility type, plastic greenhouse has the characteristics of less investment and simple operation, and is more and more concerned by people. The emergence of large-span plastic greenhouse further improves the space utilization rate and environmental adaptability in the greenhouse, which has important significance for the development of facility agriculture and the increase of farmers' income in China.

[0003] Under the background of continuous updating of new technology, sunlight greenhouse begins to upgrade and transform. Some perfect roof arches are abandoned due to span problem, causing certain resource waste. At the same time, the span of large-span plastic greenhouse is increasing, the use of steel is increasing, and the construction cost is increasing year by year. These problems begin to hinder the development of facility agriculture. UTILITY MODEL CONTENT

[0004] The utility model provides a kind of large-span plastic greenhouse of retrofit type based on sunlight greenhouse arch to solve the above technical problems in the background art, which is simple in structure, complete in function, recycles abandoned sunlight greenhouse roof arch, reduces the construction cost of large-span plastic greenhouse, and promotes the development of facility agriculture.

[0005] The technical solution of the utility model is as follows: the utility model is a kind of large-span plastic greenhouse of retrofit type based on sunlight greenhouse arch, which is characterized by: the large-span plastic greenhouse of retrofit type based on sunlight greenhouse arch comprises a cross beam, a roof arch and a stand column, the cross beam comprises an upper cross beam, a lower cross beam, a connecting angle steel and a web connecting the upper cross beam and the lower cross beam, the connecting angle steel is two, respectively arranged on both sides of the upper cross beam and the lower cross beam, and connected with the upper cross beam and the lower cross beam, the roof arch comprises an arch, an upper chord and a lower chord arranged obliquely and parallelly, the upper end of the upper chord and the lower chord is connected with the upper end of the arch, and the lower end of the upper chord and the lower chord is connected with the connecting angle steel; the arch, the upper chord and the lower chord are two groups, symmetrically arranged on both sides of the cross beam, a "T" type connecting support is fixed above the upper cross beam, the "T" type connecting support comprises a horizontal support rod and a vertical support rod connected perpendicularly, the ends of the horizontal support rod are respectively connected with the two groups of upper chords, the upper end of the vertical support rod is connected with the horizontal support rod, and the lower end is connected with the upper cross beam, the upper end of the stand column is connected with the lower cross beam, the lower end of the stand column is arranged on the stand column base, and the lower end of the arch is arranged on the roof base.

[0006] Further, the cross beam further comprises a cross beam angle steel diagonal brace, the cross beam angle steel diagonal brace is arranged between the upper cross beam and the lower cross beam, the upper cross beam and the lower cross beam are both provided with a cross beam steel plate, the cross beam steel plate is provided with four cross beam steel plate holes at four corners, and the cross beam steel plate hole is provided with a cross beam bolt.

[0007] Further, the web member is provided with a web member hole, the connecting angle steel is provided with an angle steel hole, and the web member and the connecting angle steel are fixedly connected through the web member hole, the arch brace bolt and the angle steel hole.

[0008] Further, the upper end of the column is provided with an upper end plate, the upper end plate is provided with four column upper end steel plate holes at four corners, and the upper end plate is connected with the lower cross beam through the column upper end steel plate hole and the column U-shaped bolt.

[0009] Further, the lower end of the column is provided with a lower end plate, the column base comprises a column base steel plate, a column base steel bar, a base screw rod and a column concrete foundation, the column base steel plate and the column base steel bar are arranged in the column concrete foundation, the column base steel bar is arranged below the column base steel plate, the lower end plate is arranged above the column concrete foundation, and the lower end plate and the column base steel plate are connected through the base screw rod.

[0010] Further, the roof base comprises a roof base steel plate, a roof base steel bar and a roof concrete foundation, the roof base steel plate is arranged on the roof concrete foundation, the roof base steel bar is arranged below the roof base steel plate and in the roof concrete foundation, and the lower end of the arch brace is arranged on the roof base steel plate.

[0011] Further, the roof arch web member is arranged between the upper chord and the lower chord, the horizontal support rod is provided with a support steel plate at two ends, the support steel plate is provided with four support steel plate holes at four corners, and the support steel plate is connected with the upper chord through the support steel plate hole and the connecting support U-shaped bolt.

[0012] The utility model provides a kind of retrofitting type large-span plastic greenhouse based on sunlight greenhouse arch, two side roof arches are connected by crossbeam, and are supported using stand column simultaneously, and it is convenient to construct and assemble, form rigid structure whole, improve the overall strength and load-carrying capacity of plastic greenhouse, further fixed arch by the "T" type connecting support set on upper crossbeam, horizontal bracing and vertical bracing can be well roof load is transmitted to crossbeam, partial load is dispersed, further improve the load-carrying capacity of plastic greenhouse;The utility model discloses structural connection form is suitable for the use of abandoned sunlight greenhouse roof arch, and the reuse of waste arch can be realized.The utility model discloses horizontal bracing and the highest point of roof arch top chord are flush, i.e. horizontal bracing both ends are fixed in the turning point of roof arch top chord, so that horizontal bracing and arch highest point are equal height, it is convenient to lay plastic shed film, horizontal bracing, vertical bracing and sunlight greenhouse rear roof form double triangle structure, which is the most stable structure, and the stability of plastic greenhouse is further enhanced.Several longitudinal pull rods are fixedly connected to each roof arch lower chord rod, the longitudinal pull rod extends along the length direction of the greenhouse, all arches are connected by the longitudinal pull rod to form a stable whole.The utility model discloses that crossbeam is set as several sections, each section crossbeam is connected by bolt, it is convenient to select corresponding section number according to site size during reconstruction, improve versatility, and it is convenient to transport and hoist installation.Each crossbeam is fixedly connected to a stand column, which ensures the stability of plastic greenhouse structure while reducing the number of stand columns, facilitating mechanized operation.The utility model discloses that the stand column structure is simple, reduces the reconstruction cost of greenhouse, the base structure is firm, improves the reliability of stand column fixation, sets base screw on the stand column base steel plate, which facilitates the installation and fixation of stand column and improves reconstruction construction efficiency.The utility model discloses that angle steel is used as connecting piece, two wings of angle steel are connected with web and arch respectively, which facilitates connection operation and facilitates increasing the contact area of arch and connecting piece, improving the firmness of connection.

[0013] The utility model discloses assembly debugging method operation is simple, utilizes standard connecting piece to connect and fix, further reduces the construction cost of plastic greenhouse, and it is convenient to install, and service life is long;The setting of "T" type connecting support makes the top connecting place of arch form triangle structure, improves the overall stability and load-carrying capacity of plastic greenhouse.The utility model discloses method using product phase intact, structure scientific, strength standard abandoned sunlight greenhouse framework reconstructs large-span plastic greenhouse, which is reasonable and feasible, not only recycles sunlight greenhouse arch material, reduces sunlight greenhouse upgrading reconstruction cost, but also reduces the construction cost of large-span plastic greenhouse, which is beneficial to improve the production enthusiasm of farmers. ACCURACY OF DRAWINGS

[0014] Figure 1 It is the sectional view of the utility model;

[0015] Figure 2 It is the crossbeam structure schematic view of the utility model;

[0016] Figure 3 It is the connecting schematic view of the cross beam and the roof arch frame of the utility model;

[0017] Figure 4 It is the connecting schematic view of the "T" type connecting support and the roof arch frame of the utility model;

[0018] Figure 5 It is the connecting schematic view of the cross beam and the column of the utility model;

[0019] Figure 6 It is the connecting schematic view of the column and the column base of the utility model;

[0020] Figure 7 It is the connecting schematic view of the arch frame and the roof base of the utility model.

[0021] The sign of the drawing is explained as follows:

[0022] 1, upper cross beam; 2, cross beam steel plate; 3, cross beam bolt; 4, cross beam angle steel inclined strut; 5, lower cross beam; 6, cross beam steel plate hole; 7, web member hole; 8, web member; 9, upper chord; 10, connecting angle steel; 11, arch frame bolt; 12, lower chord; 13, angle steel hole; 14, cross beam; 15, roof arch frame web member; 16, roof arch frame; 17, support steel plate; 18, horizontal bracing; 19, connecting support U bolt, 20, support steel plate hole; 21, vertical bracing; 22, column U bolt; 23, upper end plate; 24, column; 25, column upper end steel plate hole; 26, lower end plate; 27, column base steel plate; 28, column base steel bar; 29, column concrete foundation; 30, roof base steel plate; 31, roof base steel bar; 32, roof concrete foundation; 33, base screw rod; 34, column base; 35, "T" type connecting support; 36, arch frame; 37, roof base. DETAILED DESCRIPTION

[0023] The overall scheme of the utility model is further explained in detail in combination with the drawings and specific embodiments:

[0024] Referring to Figures 1 to 3The utility model discloses a structure of specific embodiment includes crossbeam 14, roof arch 16 and stand 24, and the crossbeam is truss structure, and the crossbeam includes the upper crossbeam 1 and lower crossbeam 5 of being fixedly connected in an organic whole and the web 8 of being fixedly connected with the upper crossbeam and lower crossbeam, crossbeam angle steel inclined strut 4, and truss structure makes the crossbeam can bear greater load, simultaneously makes roof load dispersion even to other arch and stand 24 on. Roof arch 16 includes arch 36, the upper chord 9 and lower chord 12 of being arranged in the inclination and parallel, and is provided with roof arch web 14 between the upper chord and lower chord, and the lower end of upper chord 9 end and lower chord 12 is respectively fixedly connected with the connecting angle steel 10, and the connecting angle steel 10 is two, and is arranged on the both sides of upper crossbeam 1 and lower crossbeam 5 respectively, and is connected with upper crossbeam 1 and lower crossbeam 5, and is provided with angle steel hole 13 on connecting angle steel 10, and is provided with web hole 7 on web 8, and connecting angle steel 10 is fixedly connected with web 8 through angle steel hole 13, arch bolt 11 and web hole 7. Upper crossbeam 1 and lower crossbeam 5 all are provided with crossbeam steel sheet 2, and four crossbeam steel sheet holes 6 are arranged in four corners of crossbeam steel sheet 2, and crossbeam bolt 3 is arranged in crossbeam steel sheet hole 6, and both ends of crossbeam 14 are fixed on the shed head through crossbeam bolt 3.

[0025] The connecting angle steel 10 connects the roof arch 16 and the crossbeam 14, the construction and assembly are convenient, a rigid structure whole is formed, and the overall strength and load resistance of the plastic greenhouse are improved.

[0026] The upper crossbeam 1 is fixedly connected with a T-shaped connecting support 35, the T-shaped connecting support 35 comprises horizontal struts 18 fixedly connected with two roof arches 16 at two ends and vertical struts 21 fixedly connected with the horizontal struts 18 at upper ends, and lower ends of the vertical struts 21 are fixedly connected with the upper crossbeam 1. The horizontal struts 18 and the vertical struts 21 can well transmit the roof load to the crossbeam, disperse the local load, and improve the load resistance of the plastic greenhouse. The horizontal struts 18 are fixed at the turning positions of the roof arch upper chords 9, so that the horizontal struts 18 are in the same height as the highest points of the roof arch upper chords 9, the plastic shed film is conveniently laid, and the lower ends of the vertical struts 21 are fixed on the upper crossbeam 1. The horizontal struts 18, the vertical struts 21 and the rear roof of the sunlight greenhouse form a double-triangle structure, which is the most stable structure, and the plastic greenhouse is stable.

[0027] The utility model also comprises a plurality of longitudinal pull rods fixedly connected with lower chords of the roof arches, and the longitudinal pull rods extend along the length direction of the greenhouse. Two longitudinal pull rods are symmetrically fixed to the lower parts of the horizontal struts 18, and a plurality of longitudinal pull rods are symmetrically fixed to the lower chords 12 of the roof arches 16. The longitudinal pull rods connect all the arches to form a stable whole.

[0028] The cross beam 14 comprises several sections, each section of the cross beam 14 is connected by bolts, and each section of the cross beam 14 is fixedly connected with a stand column 24. The large-span plastic greenhouse has an arch spacing of 1 m, and a stand column 24 is arranged every five arch frames. The stand column 24 is fixed on the lower cross beam 1. The fixing position of the stand column 24 and the cross beam 14 is located at the middle of each section of the cross beam. The structure of the plastic greenhouse is stable, the number of the stand columns 24 is reduced, and the mechanized operation is facilitated.

[0029] Referring to Figure 4 The horizontal support rod 18 is provided with a support steel plate 17 at the two ends in a tilted manner, four support steel plate holes 20 are arranged at the four corners of the support steel plate 17, and the support steel plate 17 is connected with the upper chord 9 through the support steel plate holes 20 and the connecting support U-shaped bolt 19.

[0030] Referring to Figure 5 The stand column 24 comprises a column body, an upper end plate 23 and a lower end plate 26 fixedly connected to the two ends of the column body. Four stand column upper end steel plate holes 25 are arranged at the four corners of the upper end plate 23, and the upper end plate 23 is connected with the lower cross beam 5 through the stand column upper end steel plate holes 25 and the stand column U-shaped bolt 22.

[0031] Referring to Figure 6 The lower end plate 26 is fixedly connected with a stand column base 34. The stand column base comprises a stand column base steel plate 27, a stand column base steel bar 28, a base screw rod 33 and a stand column concrete foundation 29. The stand column base steel plate 27 and the stand column base steel bar 28 are arranged in the stand column concrete foundation 29, the stand column base steel bar 28 is arranged below the stand column base steel plate 27, the lower end plate 26 is arranged above the stand column concrete foundation, and the stand column base steel plate 27 is fixedly connected with the base screw rod 33 vertically penetrating through the lower end plate 26 upwards.

[0032] Referring to Figure 7 The roof base 37 comprises a roof base steel plate 30, a roof base steel bar 31 and a roof concrete foundation 32. The roof base steel plate 30 is arranged on the roof concrete foundation 32, the roof base steel bar 31 is arranged below the roof base steel plate 30 and in the roof concrete foundation 32, and the lower end of the arch frame 36 is arranged on the roof base steel plate 30.

[0033] Two side ventilation openings and two top ventilation openings are arranged in the plastic greenhouse by utilizing the original arch frame clamping groove structure. The side ventilation openings are provided with insect-proof nets, the top ventilation openings are provided with insect-proof nets and water-catching prevention nets. The original top ventilation openings and side ventilation openings meet the ventilation requirement of the plastic greenhouse. The insect-proof nets and water-catching prevention nets can reduce the occurrence of diseases and insect pests of the plastic greenhouse. According to the production requirement, a heat preservation quilt can be additionally arranged. The use of the heat preservation quilt enables the plastic greenhouse to have the capability of producing low-temperature-resistant leafy vegetables in winter.

[0034] The utility model discloses still provide a kind of method for reconstructing large-span plastic greenhouse using sunlight greenhouse, comprising the following steps:

[0035] 1) Preparation of rebuilt standard parts:

[0036] Preparation of cross beam 14: The cross beam 14 is a truss structure, including upper cross beam 1, lower cross beam 5 and web members 8. The upper cross beam 1, lower cross beam 5 and web members 8 are all made of 100*100*3 hot-dip galvanized square steel pipes. The spacing between each web member 8 is 1000mm, the spacing between the upper cross beam 1 and the lower cross beam 5 is 400mm, and the "V" shaped 50*3 angle steel braces 4 are used for reinforcement between the web members 8; Each 6000mm of the cross beam is a section, and each section of the cross beam 14 contains six web members 8, which are arranged starting from 100mm at one end and the other end is open; The two ends of the upper cross beam 1 and the lower cross beam 5 are fixed with cross beam steel plates 2. The cross beam steel plates 2 are 170*170*5 hot-dip galvanized steel plates, and four cross beam steel plate holes 6 are drilled at the four corners of the cross beam steel plates 2; Two web member holes 7 are drilled in the web members 8.

[0037] Preparation of connecting angle steel 10: The connecting angle steel 10 is made of 50*4 hot-dip galvanized angle steel, and two angle steel holes 13 are drilled in the longitudinal direction of the connecting angle steel 10. The length of the connecting angle steel 10 is 400mm.

[0038] Preparation of "T" shaped connecting bracket 35: The "T" shaped connecting bracket 35 includes a horizontal brace 18 and a vertical brace 21. The horizontal brace 18 and the vertical brace 21 are made of 40*40 hot-dip galvanized square steel pipes and are fixed into a "T" shape. The two ends of the horizontal brace 18 are inclined and fixed with bracket steel plates 17. The bracket steel plates 17 are 50*110*3 hot-dip galvanized steel plates, and four bracket steel plate holes 20 are drilled in the bracket steel plates 17.

[0039] Preparation of column 24: The column 24 is selected as a φ80*4 hot-dip galvanized round steel pipe. The upper end of the column 24 is fixed with an upper end plate 23. The upper end plate 23 is a 190*190*8 hot-dip galvanized steel plate, and the lower end is fixed with a lower end plate 26. The lower end plate 26 is a 180*180*8 hot-dip galvanized steel plate, and four holes are drilled on the upper end plate 23 and the lower end plate 26 respectively.

[0040] Preparation of column base 34: The column base 34 includes a column base steel plate 27, column base steel bars 28 and φ16 base screws 33. The column base steel bars 28 are bent into a "U" shape, and the two ends are bent outward to form hooks. The column base steel plate 27 is a 180*180*8 hot-dip galvanized steel plate, and the column base steel bars 28 are φ10 threaded steel bars.

[0041] Preparation of roof base plate 37: The roof base plate 37 includes a roof base plate 30 and roof base steel bars 31. The roof base steel bars 31 are bent into a "U" shape, and the two ends are bent outward to form hooks; The roof base plate 30 is a 100*200*5 hot-dip galvanized steel plate, and the roof base steel bars 31 are φ10 threaded steel bars.

[0042] Two web member holes 7 of the beam web member 8 are φ22mm, with a distance of 200mm; two angle steel holes 13 of the connecting angle steel 10 are φ22mm, with a distance of 200mm; four support steel plate holes 20 of the support steel plate 17 are φ10mm, arranged in a matrix, with a matrix long side of 32mm and a matrix short side of 20mm; four upper end steel plate holes 25 of the upper end plate 23 of the column 24 are φ20mm, arranged in a matrix, with a matrix long side of 140mm and a matrix short side of 120mm; four holes of the lower end plate 26 are φ18mm, arranged in a matrix, with a matrix side length of 130mm; the column base steel bars 28 and the base screws 33 are respectively fixed on both sides of the column base steel plate 27, the column base steel bars 28 are two in parallel, the base screws 33 are four in total, with a specification of φ18*70, arranged in a matrix, with a matrix side length of 130mm; the roof base steel bars 31 are fixed on one side of the roof base steel plate 30, two in parallel.

[0043] 2) Quality evaluation of the sunlight greenhouse roof arch, the quality of the sunlight greenhouse roof arch that needs to be removed and reconstructed is evaluated, the corrosion, deformation and damage of the arch are checked, and the sunlight greenhouse with intact appearance, scientific structure and standard strength is used for reconstruction.

[0044] 3) Non-destructive removal of the sunlight greenhouse roof arch, the first step is to remove the enclosure materials of the front and rear roofs, the second step is to remove the clamping groove, the membrane rod and the water retaining net, the third step is to cut and remove all the longitudinal rods, and the fourth step is to separate the single arch from the base by cutting, and the removal process should avoid causing secondary deformation of the arch.

[0045] 4) Site selection and design of the plastic greenhouse, a site with good drainage, sufficient light, far away from the main traffic trunk and dust area is selected, the appropriate light roof angle and the height-span ratio of the plastic greenhouse are determined according to the cultivation purpose and geographical location, and the construction drawing is drawn combined with the size of the sunlight greenhouse roof arch.

[0046] The person who selects the site and draws the construction drawing should fully understand the structural characteristics of the pre-reconstructed sunlight greenhouse roof arch and the environmental characteristics of the selected site, be able to determine the inclination angle of the support steel plate 17, the length of the horizontal and vertical struts 18 and 21 and the length of the column 24 according to the specific situation, and be able to additionally add reinforcing structures to the plastic greenhouse.

[0047] 5) Reconstruction of the sunlight greenhouse roof arch structure, the rear roof is cut according to the determined light roof angle, the dihedral angle between the cutting plane and the front roof and the light roof angle are complementary, the angle steel is vertically fixed at the cutting position of the rear roof, and the angle steel is horizontally fixed at the cutting position of the front roof.

[0048] 6) Plastic greenhouse infrastructure, the first step is to level the target plot, the second step is to lay out according to the construction drawings, the third step is to pour the reinforced concrete foundation, the depth of each column concrete foundation 29 and roof concrete foundation 32 is 400mm, the lateral dimension is 200mm, the column reinforced concrete foundation is embedded with column base 34, and the roof reinforced concrete foundation is embedded with roof base 37.

[0049] The column base steel plate 27 is located inside the column concrete foundation 29, and the upper base screw 33 is 30mm higher than the surface of the column concrete foundation 29; the roof base steel plate 30 is located on the surface of the roof concrete foundation 32; the surfaces of the column concrete foundation 29 and the roof concrete foundation 32 are on the same horizontal plane; the spacing between each column concrete foundation 29 is 6000mm, and the spacing between each roof concrete foundation 32 is 1000mm.

[0050] 7) Plastic greenhouse assembly and debugging:

[0051] 7.1) Install and fix the shed head and column 24, and use the base screw 33 to fix the column 24 on the column base 34;

[0052] 7.2) Hoist the cross beam 14 for connection and fixation, and use the bolt to fix the two ends of the cross beam 14, so that the cross beam 14 forms a rigid whole; the two ends of the whole cross beam 14 are fixed on the shed head through the cross beam bolt 3, and the lower cross beam 5 is fixed on the column 24 through the column U-shaped bolt 22;

[0053] 7.3) Hoist the roof arch 16 on both sides of the cross beam 14, and fix and connect the connecting angle steel 10 on the roof arch 16 and the web 8 on the cross beam 14 through the arch bolt 11, and the ground end of the roof arch 16 is fixed on the roof base 37;

[0054] 7.4) Install the "T" type connecting bracket 35, and the two ends of the horizontal strut 18 are connected to the top chord 9 through the connecting bracket U-shaped bolt 19, and the lower end of the vertical strut 21 is fixed on the upper cross beam 1; the two ends of the horizontal strut 18 are fixed at the turning points of the front and rear top chords 9, so that the horizontal strut 18 is at the same height as the highest point of the roof arch 16;

[0055] 7.5) Install the longitudinal pull rod, the slot and the inclined strut, and use the "U" type buckle for fixation;

[0056] 7.6) Perform rust-proof treatment on the bolt connection and grounding foundation;

[0057] 7.7) Install the plastic shed film, the insect prevention net, the water prevention net, the film rolling machine and the film pressing line, and the plastic shed film, the insect prevention net and the water prevention net are fixed on the arch through the slot, and the film pressing line is fixed on the embedded foundation;

[0058] 7.8) according to the plastic greenhouse design requirements to select installation thermal quilt and curtain machine, thermal quilt upper end fixed on horizontal support rod 18;

[0059] 7.9) according to the production requirements to install other environmental control equipment and crop cultivation equipment.

[0060] 8) check the plastic greenhouse construction, accept qualified plastic greenhouse.

[0061] 9) complete the reconstruction work.

[0062] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, and the protection scope of the present application should be subject to the protection scope of the claims.

[0063] The technical content not specifically described in the content of the present application and the above embodiments is the same as the prior art.

Claims

1. A modified large-span plastic greenhouse based on a solar greenhouse arch frame, characterized in that: The modified large-span plastic greenhouse based on a solar greenhouse arch frame includes crossbeams, a roof arch frame, and columns. The crossbeams include an upper crossbeam, a lower crossbeam, connecting angle steel, and web members that fix the upper and lower crossbeams together. Two connecting angle steels are respectively located on both sides of the upper and lower crossbeams and connected to them. The roof arch frame includes an arch frame, inclined and parallel upper and lower chords. The upper ends of the upper and lower chords are connected to the upper end of the arch frame, and the lower ends of the upper and lower chords are connected to the connecting angle steel. Angle steel is used for connection; the arch frame, upper chord and lower chord are in two sets, symmetrically arranged on both sides of the crossbeam. A "T"-shaped connecting bracket is fixed above the upper crossbeam. The "T"-shaped connecting bracket includes horizontal and vertical struts that are perpendicularly connected to each other. The two ends of the horizontal strut are respectively connected to the two sets of upper chords. The upper end of the vertical strut is connected to the horizontal strut, and the lower end is connected to the upper crossbeam. The upper end of the column is connected to the lower crossbeam. The lower end of the column is set on the column base. The lower end of the arch frame is set on the roof base.

2. The modified large-span plastic greenhouse based on a solar greenhouse arch frame as described in claim 1, characterized in that: The crossbeam also includes crossbeam angle steel bracing, which is set between the upper and lower crossbeams. Both the upper and lower crossbeams are provided with crossbeam steel plates, and four crossbeam steel plate holes are provided at the four corners of the crossbeam steel plates. Crossbeam bolts are installed in the crossbeam steel plate holes.

3. The modified large-span plastic greenhouse based on a solar greenhouse arch frame as described in claim 2, characterized in that: The web members are provided with web member holes, and the connecting angle steel is provided with angle steel holes. The web members and the connecting angle steel are fastened together through the web member holes, arch bolts, and angle steel holes.

4. The modified large-span plastic greenhouse based on a solar greenhouse arch frame as described in claim 3, characterized in that: The upper end of the column is provided with an upper end plate, and four steel plate holes for the upper end of the column are respectively provided at the four corners of the upper end plate. The upper end plate is connected to the lower crossbeam through the steel plate holes and the column U-bolts.

5. The modified large-span plastic greenhouse based on a solar greenhouse arch frame as described in claim 4, characterized in that: The column is provided with a lower end plate at its lower end. The column base includes a column base steel plate, a column base reinforcing bar, a base bolt, and a column concrete foundation. The column base steel plate and the column base reinforcing bar are located inside the column concrete foundation. The column base reinforcing bar is located below the column base steel plate. The lower end plate is located above the column concrete foundation. The lower end plate and the column base steel plate are connected by the base bolt.

6. The modified large-span plastic greenhouse based on a solar greenhouse arch frame as described in claim 5, characterized in that: The roof base includes a roof base steel plate, roof base reinforcement bars, and a roof concrete foundation; the roof base steel plate is set on the roof concrete foundation, the roof base reinforcement bars are set below the roof base steel plate and located within the roof concrete foundation, and the lower end of the arch frame is set on the roof base steel plate.

7. The modified large-span plastic greenhouse based on a solar greenhouse arch frame as described in any one of claims 1 to 6, characterized in that: A roof arch frame web member is provided between the upper chord and the lower chord. Support steel plates are inclined at both ends of the horizontal support member. Four support steel plate holes are provided at the four corners of the support steel plate. The support steel plate is connected to the upper chord through the support steel plate holes and connecting bracket U-bolts.

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