Rust-proof steel pipe special for greenhouse

Abstract

The utility model belongs to the technical field of greenhouses, and discloses a special antirust steel pipe for greenhouses, which comprises a steel pipe main body, a first outer zinc layer arranged on the outer side of the steel pipe main body, a first polyethylene coating arranged on the outer side of the first outer zinc layer, an inner zinc layer arranged on the inner side of the steel pipe main body, an extension rod slidably connected with the steel pipe main body, and a second outer zinc layer arranged on the outer side of the extension rod. The steel pipe body is connected with a threaded sleeve, the threaded sleeve is connected with a fixing clamping block, the fixing clamping block is made of elastic materials, the extension rod is slidably connected with a fixing sleeve, the fixing sleeve is provided with an internal thread matched with the threaded sleeve, the fixing sleeve is provided with a clamping groove, and the clamping groove is matched with the fixing clamping block. The extension rod is connected with an angle adjusting device. The internal space of the greenhouse can be flexibly changed according to the space requirements of different crops in different growth stages, and the requirements of the crops in different growth stages are met.

Description

Technical Field

[0001] This utility model relates to the field of greenhouse technology, and in particular to a special rust-proof steel pipe for greenhouses. Background Technology

[0002] Greenhouses are frequently used in agricultural planting. They form a greenhouse that allows for temperature regulation to meet the needs of plant cultivation and to grow various off-season vegetables to meet market demand. Due to their high strength and ease of assembly, steel pipes have become the main material for building greenhouse frames. With the development of greenhouse planting technology, the application of greenhouses for growing off-season vegetables is becoming increasingly widespread. Therefore, the demand for steel pipes with anti-corrosion coatings for greenhouse frames is growing.

[0003] A search of Chinese utility model patent (publication number CN213486006U) reveals a steel pipe with an anti-corrosion coating for greenhouse frames. The steel pipe includes a main body, an outer zinc layer, a polyethylene coating, an inner zinc layer, a mounting base, a connecting shaft, a ratchet, a connecting plate, and other structures. This improves the corrosion resistance of the steel pipe, extends the service life of the steel pipe greenhouse frame, facilitates splicing, and allows for adjustable angles between adjacent steel pipes, making it easy to assemble the greenhouse frame.

[0004] However, practical application has revealed that this technical solution still has the following shortcomings:

[0005] Different crops have different requirements for space height and area at different growth stages. With a fixed length for the main body of the steel pipes, it's difficult to flexibly adjust them according to crop growth height and planting density. Furthermore, when installing a greenhouse, the fixed length of the steel pipes may be limited by the size and shape of the installation site. During construction, because the pipe length cannot be changed, installers may need to spend more time and effort adjusting the position and angle of the pipes to fit the overall structure of the greenhouse, reducing installation efficiency. Utility Model Content

[0006] The present invention aims to provide a special rust-proof steel pipe for greenhouses to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A special rust-proof steel pipe for greenhouses includes a steel pipe body, an outer zinc coating on the outer side of the steel pipe body, a polyethylene coating on the outer side of the outer zinc coating, an inner zinc coating on the inner side of the steel pipe body, an extension rod slidably connected to the steel pipe body, an outer zinc coating on the outer side of the extension rod, a polyethylene coating on the outer side of the outer zinc coating, a threaded sleeve connected to the steel pipe body, a fixing block connected to the threaded sleeve, the fixing block being made of elastic material, a fixing sleeve slidably connected to the extension rod, the fixing sleeve having an internal thread matching the threaded sleeve, a groove on the fixing sleeve that engages with the fixing block, and an angle adjustment device connected to the extension rod.

[0009] Preferably, the angle adjustment device includes a housing, which is connected to an extension rod. The housing is rotatably connected to a rotating shaft, which is connected to a gear and a support frame. The support frame is connected to a connecting plate, and the connecting plate is connected to a connecting sleeve. The connecting sleeve has an internal thread, and the housing is connected to a limit device.

[0010] Preferably, the limiting device includes a protective shell, which is connected to the housing. The housing is slidably connected to a locking tooth, which engages with a gear. The locking tooth is connected to a connecting rod, which is slidably connected to the protective shell. A spring is sleeved on the outside of the connecting rod, and both ends of the spring are connected to the protective shell and the locking tooth, respectively.

[0011] Preferably, the housing is connected to a second connecting sleeve, the second connecting sleeve has an internal thread, the extension rod has an external thread, and the external thread engages with the internal threads of the first connecting sleeve and the second connecting sleeve.

[0012] Preferably, the fixing block is connected to an anti-slip layer.

[0013] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0014] (1) This technical solution, by setting an extension rod, threaded sleeve, fixing block, and fixing cylinder, allows for adjustment of the length of the extension rod located outside the main body of the steel pipe and limits the position of the extension rod. When installing the greenhouse, it can better adapt to the conditions of the installation site. Installers can first install the main body of the steel pipe and then adjust the position of the extension rod according to the actual situation. Moreover, adjusting the extension rod using components such as the threaded sleeve, fixing block, and fixing cylinder is relatively simple, requiring no complex tools or techniques, effectively shortening installation time and improving installation efficiency. Furthermore, it allows for flexible changes to the internal space of the greenhouse according to the spatial requirements of different crops at various growth stages. When crops grow to require more space, the extension rod can be pulled outwards to increase the height or width of the greenhouse, providing sufficient vertical or horizontal growth space to meet the needs of different growth stages. By setting polyethylene coating layer one, polyethylene coating layer two, inner zinc layer, outer zinc layer one, and outer zinc layer two, rust on the steel pipe body and extension rod can be prevented, ensuring that the greenhouse maintains good mechanical properties throughout its entire service life. During the long-term use of the greenhouse, there is no need for frequent maintenance work such as rust removal and repainting of the steel pipe body and extension rods, saving a lot of manpower, material resources and time costs.

[0015] (2) By setting gears, shafts and support frames, the connecting sleeve can rotate relative to the extension rod, which makes it easy to adjust the angle of the connected parts, making it easy to build the greenhouse frame without affecting the overall strength of the greenhouse frame.

[0016] (3) By setting a spring, the locking teeth are always in contact with the gear, which can effectively limit the unexpected rotation of the gear. When subjected to other external impacts, even if there is an external force that causes the connecting sleeve to rotate, the restriction between the locking teeth and the gear can ensure that the connecting sleeve and the connected greenhouse components remain in their original positions, avoiding damage to the greenhouse due to accidental movement of structural components, and providing a safer environment for crops and equipment inside the greenhouse.

[0017] (4) By setting up connecting sleeve two, the angle adjustment device can be detached from the extension rod. When the angle adjustment device malfunctions, such as gear wear, shaft jamming, or spring failure, it can be easily removed from the extension rod by disassembling connecting sleeve two. This allows for convenient individual maintenance without the need for complex on-site maintenance of the entire device, avoiding the inconvenience that may arise from operating in confined spaces. Furthermore, the angle adjustment device and extension rod can be transported separately, reducing the risk of damage during transportation. Additionally, the disassembled device occupies less space, facilitating reasonable stacking and management in warehouses and other storage locations.

[0018] (5) By setting an anti-slip layer, the friction between the fixing block and the extension rod can be increased, ensuring that the extension rod is firmly held in the set position, thereby ensuring the overall structural stability of the greenhouse and reducing the risk of structural damage caused by component displacement. Attached Figure Description

[0019] Figure 1 This is a front sectional view of the present invention;

[0020] Figure 2 for Figure 1 Enlarged view of point A;

[0021] Figure 3 This is a front view of the threaded sleeve and fixing block provided by this utility model;

[0022] Figure 4 A top sectional view of the main body of the steel pipe provided in this utility model;

[0023] Figure 5 Top sectional view of the extension rod provided by this utility model;

[0024] Figure 6 for Figure 1 Enlarged view of point B;

[0025] Figure 7 Top sectional view of the angle adjustment device provided by this utility model;

[0026] Reference numerals in the attached drawings: 1. Steel pipe body; 2. Extension rod; 3. Fixing sleeve; 4. Fixing block; 5. Slot; 6. Housing; 7. Protective shell; 8. Connecting plate; 9. Connecting sleeve one; 10. Support frame; 11. Rotating shaft; 12. Gear; 13. Connecting sleeve two; 14. Threaded sleeve; 15. Polyethylene coating one; 16. Outer zinc layer one; 17. Inner zinc layer; 18. Polyethylene coating two; 19. Outer zinc layer two; 20. Anti-slip layer; 21. Connecting rod; 22. Spring; 23. Clamping tooth. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0028] like Figure 1-7 The illustrated rust-proof steel pipe for greenhouses includes a steel pipe body 1, an outer zinc layer 16 on the outside of the steel pipe body 1, a polyethylene coating 15 on the outside of the outer zinc layer 16, an inner zinc layer 17 on the inside of the steel pipe body 1, and two sets of extension rods 2 slidably connected to the inner wall of the steel pipe body 1. The two sets of extension rods 2 are symmetrically arranged, and an outer zinc layer 19 on the outside of the extension rods 2, and a polyethylene coating 18 on the outside of the outer zinc layer 19.

[0029] like Figure 1-3As shown, both ends of the steel pipe body 1 are connected to threaded sleeves 14. The extension rod 2 is slidably connected to the threaded sleeves 14. Several sets of fixing blocks 4 are connected to the end of the threaded sleeves 14 away from the steel pipe body 1. The inner wall of the fixing blocks 4 is connected to an anti-slip layer 20. The several sets of fixing blocks 4 are arranged in a circular array. There is a gap between any two sets of fixing blocks 4. The fixing blocks 4 are made of elastic material. There is a gap between the inner wall of the fixing blocks 4 and the extension rod 2. The extension rod 2 is slidably connected to a fixing sleeve 3. The inner wall of the fixing sleeve 3 is provided with an internal thread that matches the threaded sleeve 14. A groove 5 is provided above the internal thread on the inner wall of the fixing sleeve 3. The groove 5 cooperates with the fixing blocks 4. The diameter of the groove 5 is slightly smaller than the diameter of the circle formed by the outer walls of the several sets of fixing blocks 4. Rotate the fixing sleeve 3 so that the fixing sleeve 3 is threadedly connected to the threaded sleeve 14. Continue to rotate the fixing sleeve 3 so that the fixing sleeve 3 is downward and the fixing block 4 gradually enters the slot 5. The inner wall of the slot 5 squeezes the fixing block 4, causing the fixing block 4 to undergo elastic deformation. The gap between any two sets of fixing blocks 4 narrows, causing the inner wall of the fixing block 4 to move closer to the extension rod 2, squeezing the anti-slip layer 20, so that the anti-slip layer 20 and the extension rod 2 are in close contact. The friction between the anti-slip layer 20 and the extension rod 2 restricts the extension rod 2 from sliding inside the steel pipe body 1.

[0030] like Figure 1 , Figure 6-7 As shown, an angle adjustment device is connected to the end of the extension rod 2 away from the main body of the steel pipe 1. The angle adjustment device includes a housing 6, and a connecting sleeve 2 13 is connected to the bottom wall of the housing 6. The connecting sleeve 2 13 has an internal thread, and the end of the extension rod 2 away from the main body of the steel pipe 1 has an external thread. The external thread mates with the internal thread of the connecting sleeve 2 13, and the extension rod 2 and the connecting sleeve 2 13 are connected by threads. A rotating shaft 11 is rotatably connected to the side wall of the housing 6. The rotating shaft 11 is connected to a gear 12 and two sets of support frames 10. The two sets of support frames 10 are located on both sides of the gear 12 and are connected to a connecting plate 8. A connecting sleeve 1 9 is connected to the top wall of the connecting plate 8. The connecting sleeve 1 9 has an internal thread, which matches the external thread of the extension rod 2. Another set of extension rods 2 can be threadedly connected to the connecting sleeve 1 9. The housing 6 is connected to a limiting device, which includes a protective shell 7 connected to the housing 6. A locking tooth 23 is slidably connected to the side wall of the housing 6, engaging with a gear 12. A connecting rod 21 is connected to the end of the locking tooth 23 away from the gear 12, and the connecting rod 21 is slidably connected to the protective shell 7. A spring 22 is sleeved on the outside of the connecting rod 21, with its two ends connected to the protective shell 7 and the locking tooth 23, respectively. Pulling the connecting rod 21 outwards causes the locking tooth 23 to gradually move away from the gear 12, compressing the spring 22. At this point, the gear 12 can rotate freely. Releasing the connecting rod 21 causes the spring 22 to rebound, pushing the locking tooth 23 to lock the gear 12 again, preventing the gear 12 from rotating and thus fixing the rotation angle of the support frame 10.

[0031] The specific implementation process is as follows:

[0032] In use, the extension rod 2, the steel pipe body 1, and the angle adjustment device can be flexibly assembled according to specific circumstances. When assembling the extension rod 2 and the steel pipe body 1, insert the two sets of extension rods 2 into the steel pipe body 1 from both ends. After adjusting the external length of the extension rods 2, align the fixing sleeve 3 with the threaded sleeve 14. Rotate the fixing sleeve 3 so that the threaded sleeve 14 is completely inside the fixing sleeve 3, thereby limiting the extension rod 2. Align the end of the extension rod 2 away from the steel pipe body with the connecting sleeve 2 13, and rotate the connecting sleeve 2 13 to thread it onto the extension rod 2. Alternatively, align another set of extension rods 2 with the connecting sleeve 1 9, and rotate the other set of extension rods 2 to thread it onto the connecting sleeve 1 9.

[0033] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A special rust-proof steel pipe for greenhouses, characterized in that: The system includes a steel pipe body (1), an outer zinc layer (16) on the outside of the steel pipe body (1), a polyethylene coating (15) on the outside of the outer zinc layer (16), an inner zinc layer (17) on the inside of the steel pipe body (1), an extension rod (2) slidably connected to the steel pipe body (1), an outer zinc layer (19) on the outside of the extension rod (2), a polyethylene coating (18) on the outside of the outer zinc layer (19), a threaded sleeve (14) connected to the steel pipe body (1), a fixing block (4) connected to the threaded sleeve (14), the fixing block (4) being made of elastic material, a fixing sleeve (3) slidably connected to the extension rod (2), the fixing sleeve (3) having an internal thread matching the threaded sleeve (14), the fixing sleeve (3) having a groove (5) that engages with the fixing block (4), and an angle adjustment device connected to the extension rod (2).

2. The rust-proof steel pipe for greenhouses as described in claim 1, characterized in that: The angle adjustment device includes a housing (6), which is connected to an extension rod (2). The housing (6) is rotatably connected to a rotating shaft (11). The rotating shaft (11) is connected to a gear (12) and a support frame (10). The support frame (10) is connected to a connecting plate (8). The connecting plate (8) is connected to a connecting sleeve (9). The connecting sleeve (9) has an internal thread. The housing (6) is connected to a limit device.

3. The rust-proof steel pipe for greenhouses as described in claim 2, characterized in that: The limiting device includes a protective shell (7), which is connected to a housing (6). The housing (6) is slidably connected to a locking tooth (23), which engages with a gear (12). The locking tooth (23) is connected to a connecting rod (21), which is slidably connected to the protective shell (7). A spring (22) is sleeved on the outside of the connecting rod (21), and both ends of the spring (22) are connected to the protective shell (7) and the locking tooth (23) respectively.

4. The rust-proof steel pipe for greenhouses as described in claim 3, characterized in that: The housing (6) is connected to a connecting sleeve two (13), the connecting sleeve two (13) is provided with an internal thread, the extension rod (2) is provided with an external thread, and the external thread is engaged with the internal threads of the connecting sleeve one (9) and the connecting sleeve two (13).

5. The rust-proof steel pipe for greenhouses as described in claim 1, characterized in that: The fixing block (4) is connected to an anti-slip layer (20).

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