Efficient heat preservation device for agricultural greenhouse

Abstract

The utility model discloses an agricultural greenhouse efficient heat preservation device which comprises a greenhouse body composed of a heat preservation wall and a greenhouse frame, an electric winding drum is installed on the top of the greenhouse body, a heat preservation film is wound on the electric winding drum, a cylinder is fixed to the other end of the heat preservation film, and arc-shaped plates are installed on the tops of the two sides of the greenhouse body. The two ends of the cylinder are in butt joint with arc-shaped sliding blocks, the sliding blocks slide in arc-shaped sliding rails on the inner sides of the arc-shaped plates, and a square box is installed on one side of the lower end of each arc-shaped plate. The positioning part is additionally arranged in the roll film heat preservation device, when the cylinder moves to the lowermost end, a heat preservation film is completely unfolded for heat preservation, at the moment, a worker rotates a hand wheel, a lead screw rotates to enable a movable block to move, an insertion block can penetrate through an arc-shaped plate to be inserted into a sliding block insertion hole, and at the moment, the sliding block is located at the lowermost end of a sliding rail and cannot move upwards; the cylinder is in a very stable state, it is guaranteed that air leakage or blocking by obstacles such as branches when the cylinder is blown by strong wind to move upwards is avoided, and the stability and efficiency of heat preservation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of greenhouse heat preservation, in particular to an efficient heat preservation device for agricultural greenhouses. Background Technique

[0002] With the rapid development of modern agriculture, greenhouse cultivation, as an important agricultural production method, plays a crucial role in ensuring the supply of agricultural products, improving agricultural production efficiency and quality. Especially in the northern regions, due to the low winter temperature, greenhouse heat preservation technology has become a key factor to ensure the normal growth of crops and the improvement of quality. Therefore, the development of efficient, economical and environmentally friendly greenhouse heat preservation technology has become one of the hotspots in the field of agricultural scientific research.

[0003] Most of the existing heat preservation technologies carry out heat preservation by laying a layer of heat preservation film on the shed surface and are equipped with some existing heating equipment for heat preservation. For example, an efficient heat preservation device for agricultural greenhouses disclosed in the patent number CN211407036U achieves the winding of the heat preservation layer through a heating pipeline and a heating device, and through a motor driving a belt to rotate a driving wheel to further rotate a winding and unwinding roller.

[0004] The above scheme solves the problem of insufficient heat preservation of conventional greenhouses well. However, after actual investigation, this scheme still has certain deficiencies. In the above existing technology, after the moving roller and the pulley reach the bottommost position to complete the unwinding of the heat preservation layer, the moving roller is in an infinite position state. When there is a strong wind outside, or when the wind blows from the ground upwards, its stability is poor, and the pulley may be driven to move upwards with the moving roller. At this time, if some branches and stones fall under the moving roller, they will be stuck by these obstacles when the moving roller returns to its original position. All of these may cause cold air to enter the inner side of the heat preservation layer through these gaps, resulting in insufficient heat preservation effect. And if the moving roller and the pulley are made of metal with a relatively large weight, it will cause a large load on the motor during winding, which is easy to damage, and the heat preservation film is easy to be pulled and torn during winding.

[0005] Therefore, the applicant proposes an efficient heat preservation device for agricultural greenhouses to solve the problem. Content of the Utility Model

[0006] The utility model provides an efficient heat preservation device for agricultural greenhouses, which solves the problem of insufficient stability at the lower end after the heat preservation layer is unwound in the above background.

[0007] To solve the above technical problems, a highly efficient heat preservation device for an agricultural greenhouse provided by the utility model includes a greenhouse body composed of a heat preservation wall and a shed frame. An electric drum is installed at the top of the greenhouse body. A heat preservation film is wound around the electric drum. The other end of the heat preservation film is fixed with a cylinder. Arc-shaped plates are installed at the tops of both sides of the greenhouse body. The two ends of the cylinder are butted with arc-shaped sliders. The sliders slide in the arc-shaped slide rails on the inner sides of the arc-shaped plates. A square box is installed at one side of the lower end of the arc-shaped plate. A positioning part is installed inside the square box. The positioning part includes a hand wheel rotating on the outer wall of the square box. The hand wheel is butted with a lead screw rotatably installed on the inner wall of the square box. A moving block is threadedly connected to the lead screw. An inserting block is arranged on one side of the moving block. The inserting block can pass through the opening of the arc-shaped plate and insert into the inserting hole on one side of the slider.

[0008] Further, a driving gear is fixed on the outer wall of the lead screw near the hand wheel. Two driven gears are engaged on both sides of the driving gear. The driven gears are rotatably connected to the inner wall of the square box and have a certain rotational resistance.

[0009] Further, receiving plates are butted on the inner sides of the lower ends of the two arc-shaped plates. The receiving plates are provided with arc grooves, and the cylinder is placed in the arc grooves of the receiving plates after the heat preservation film is completely unfolded.

[0010] Further, two ventilation openings are provided on both sides of the greenhouse body, and closable louvers are installed on the outer wall of the greenhouse body at the ventilation openings.

[0011] Further, two springs are installed on the inner wall of the slide rail at the upper end of the arc-shaped plate. One end of the spring is butted with a square plate, and the square plate contacts the slider during winding.

[0012] Further, three ball grooves are provided on the bottom surface of the slider, and steel balls are installed in the ball grooves. The steel balls replace the bottom surface of the slider to contact the slide rail of the arc-shaped plate.

[0013] Further, a control panel for driving the electric drum to rotate for winding and unwinding is installed on the inner wall of the greenhouse body, and a warning sign is installed on the inner wall of the greenhouse body on one side of the control panel.

[0014] Compared with the related technology, a highly efficient heat preservation device for an agricultural greenhouse provided by the utility model has the following beneficial effects:

[0015] By installing a positioning part in the film winding heat preservation device, when the cylinder moves to the lowest end, the heat preservation film is completely unfolded for heat preservation. At this time, the staff rotates the hand wheel, the lead screw rotates to displace the moving block, and the inserting block can pass through the arc-shaped plate and insert into the inserting hole of the slider. At this time, the slider is at the bottom end of the slide rail and cannot move up, making the cylinder in a very stable state, ensuring that there is no air leakage or being blown up by strong wind and getting stuck by obstacles such as branches, improving the stability and efficiency of heat preservation. Description of the Drawings

[0016] Figure 1 Schematic diagram of the overall three-dimensional structure of the present utility model Figure 1 ;

[0017] Figure 2 Schematic diagram of the overall three-dimensional structure of the present utility model Figure 2 ;

[0018] Figure 3 For the present utility model Figure 2 Schematic diagram of the enlarged structure at position A;

[0019] Figure 4 Schematic diagram of the partial three-dimensional structure of the present utility model;

[0020] Figure 5 Schematic diagram of the unfolded three-dimensional structure of the heat preservation film of the present utility model;

[0021] Figure 6 Schematic diagram of the three-dimensional structure of the shed body of the present utility model;

[0022] Figure 7 Schematic diagram of the structure of the positioning part of the present utility model.

[0023] Reference numerals in the figure: 1, shed body; 11, arc plate; 12, electric reel; 13, heat preservation film; 14, cylinder; 15, slider; 16, square box; 17, shutter; 18, receiving plate; 19, square plate; 110, spring; 111, control panel; 112, warning sign; 113, steel ball; 2, positioning part; 21, handwheel; 22, lead screw; 23, moving block; 24, insert block; 25, driving gear; 26, driven gear. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments; based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] By Figures 1 - 7Provided is a highly efficient heat preservation device for an agricultural greenhouse, which includes a greenhouse body 1 composed of a heat preservation wall and a shed frame. An electric reel 12 is installed at the top of the greenhouse body 1, and a heat preservation film 13 is wound around the electric reel 12. The other end of the heat preservation film 13 is fixed with a cylinder 14. Arc-shaped plates 11 are installed at the tops of both sides of the greenhouse body 1. Both ends of the cylinder 14 are butted with arc-shaped sliders 15, and the sliders 15 slide in the arc-shaped slide rails on the inner sides of the arc-shaped plates 11. A square box 16 is installed on one side at the lower end of the arc-shaped plate 11, and a positioning part 2 is installed inside the square box 16. The positioning part 2 includes a handwheel 21 rotatably installed on the outer wall of the square box 16. The handwheel 21 is connected to a lead screw 22 rotatably installed on the inner wall of the square box 16. A moving block 23 is threadedly connected to the lead screw 22. An insertion block 24 is arranged on one side of the moving block 23, and the insertion block 24 can pass through the opening of the arc-shaped plate 11 and insert into the insertion hole on one side of the slider 15.

[0026] Specifically, the device consists of an electric reel 12, a heat preservation film 13 and a cylinder 14 for pulling the film to form a film rolling heat preservation device, and a positioning part 2 is additionally installed on the heat preservation device. When in use, the electric reel 12 unwinds, and the slider 15 slides fittingly in the slide rail of the arc-shaped plate 11. The cylinder 14 makes an arc-shaped movement and drives the unwinding. When it moves to the lowest end, the heat preservation film 13 is fully unfolded for heat preservation. At this time, the staff rotates the handwheel 21, and the lead screw 22 rotates to displace the moving block 23. The insertion block 24 can pass through the arc-shaped plate 11 and insert into the insertion hole of the slider 15. At this time, the slider 15 is at the bottom end of the slide rail and cannot move upward, making the cylinder 14 in a very stable state, ensuring that there is no air leakage or being blown upward by strong wind and getting stuck by obstacles such as branches. The stability of this heat preservation device is very good. It should be noted that the driving of the greenhouse body 1 and the electric reel 12 are both prior arts, and existing heating equipment can be installed on the greenhouse body 1, which is also an existing design. Therefore, it will not be elaborated herein. A conventional light-transmitting film can be additionally installed on the shed frame. And when the insertion block 24 is in the initial position, one end of it is always in the insertion opening of the arc-shaped plate 11. Therefore, there is no need to consider the problem of limiting the moving block 23.

[0027] A driving gear 25 is fixed to the outer wall of the end of the lead screw 22 close to the handwheel 21. Two driven gears 26 are meshed on both sides of the driving gear 25. The driven gears 26 are rotatably connected to the inner wall of the square box 16 and have a certain rotational resistance.

[0028] Furthermore, in the stable optimization design of the handwheel 21, the lead screw 22 itself can be designed into a rotational structure with a certain resistance. At the same time, the driving gear 25 and two driven gears 26 are additionally installed, so that a certain amount of force needs to be exerted by the hand to rotate the handwheel 21. Therefore, even if there is a strong wind outside, the handwheel 21 will not rotate easily, further enhancing the stability. At the same time, the handwheel 21 can also be designed to be detachable. After positioning, it can be removed, which can effectively ensure that the lead screw 22 will not rotate, and then ensure the stability of the insertion block 24. It should be noted that in the initial state, the driving gear 25 is in contact with the moving block 23.

[0029] At the inner sides of the lower ends of the two arc-shaped plates 11, a receiving plate 18 is butted. The receiving plate 18 is provided with an arc groove, and the cylinder 14 is placed in the arc groove of the receiving plate 18 after the heat preservation film 13 is completely unfolded.

[0030] By designing the receiving plate 18, in the traditional technology, most of the cylinders 14 are placed on the ground, so the contact area is too small and it is easy to be damaged. Therefore, the receiving plate 18 further stably supports the cylinder 14 through the arc groove, and it is not easy to leak air. Moreover, the cylinder 14 does not contact the ground, so it is not easy to be corroded and worn, and the service life is prolonged.

[0031] The shed body 1 is provided with two ventilation openings on both sides, and the outer wall of the shed body 1 is provided with closable louver plates 17 at the ventilation openings.

[0032] By designing the louver plates 17, a ventilation fan (not shown in the figure) in the prior art can be installed inside the ventilation openings of the shed body 1. Then, when the greenhouse is not in use, the louver plates 17 can be closed to avoid too much dust entering through the ventilation openings. And when keeping warm, the ventilation openings of the louver plates 17 can be reduced without affecting the growth of crops, which can further improve the heat preservation effect.

[0033] At the upper ends of the arc-shaped plates 11, two springs 110 are installed on the inner wall of the slide rail. One end of the spring 110 is butted with a square plate 19. The square plate 19 contacts the slider 15 during winding. The bottom surface of the slider 15 is provided with three ball grooves, and steel balls 113 are installed in the ball grooves. The steel balls 113 replace the bottom surface of the slider 15 to contact the slide rail of the arc-shaped plate 11.

[0034] In the optimization of the winding and unwinding of the heat preservation device, the steel balls 113 are used to slide instead of the bottom surface of the slider 15, so that the sliding resistance is smaller, especially during the upward pulling type of winding. At the same time, after winding, the square plate 19 contacts the slider 15 and the spring 110 is in a compressed state at this time. Then, during unwinding, the spring 110 can push the slider 15 a short distance to avoid that when it is at the highest position, the inclination is not enough to cause the slider 15 to not smoothly move down for unwinding. It is very practical. It should be noted that the heat preservation film 13 has a certain strength and toughness in design.

[0035] The inner wall of the shed body 1 is provided with a control panel 111 for driving the electric winding drum 12 to wind and unwind, and a warning sign 112 is installed on the inner wall of the shed body 1 on one side of the control panel 111.

[0036] By designing the warning sign 112, the warning sign 112 can mark warning words and give a prompt when using the control panel 111 to wind and unwind. For example, the warning sign 112 can write that the restriction of the positioning part 2 must be released before winding, etc. It can well avoid the heat preservation film 13 being pulled off when winding directly without releasing the restriction. It is very practical.

[0037] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An efficient heat preservation device for an agricultural greenhouse, comprising a greenhouse body (1) composed of a heat preservation wall and a shed frame. An electric winding drum (12) is installed at the top of the greenhouse body (1), a heat preservation film (13) is wound around the electric winding drum (12), a cylinder (14) is fixed at the other end of the heat preservation film (13), and arc-shaped plates (11) are installed at the tops of both sides of the greenhouse body (1), characterized in that: Both ends of the cylinder (14) are butted with arc-shaped sliders (15), and the sliders (15) slide in the arc-shaped slide rails on the inner side of the arc-shaped plate (11). One side of the lower end of the arc-shaped plate (11) is provided with a square box (16), and a positioning part (2) is installed inside the square box (16). The positioning part (2) includes a hand wheel (21) rotatably mounted on the outer wall of the square box (16). The hand wheel (21) is butted with a lead screw (22) rotatably mounted on the inner wall of the square box (16). A moving block (23) is threadedly connected to the lead screw (22). One side of the moving block (23) is provided with an inserting block (24), and the inserting block (24) can pass through the opening of the arc-shaped plate (11) and insert into the inserting hole on one side of the slider (15).

2. The highly efficient heat preservation device for an agricultural greenhouse according to claim 1, wherein, A driving gear (25) is fixed to the outer wall of the end of the lead screw (22) close to the hand wheel (21). Two driven gears (26) are engaged on both sides of the driving gear (25). The driven gears (26) are rotatably connected to the inner wall of the square box (16) and have a certain rotational resistance.

3. An efficient heat preservation device for agricultural greenhouses according to claim 1, characterized in that, The lower inner sides of the two arc-shaped plates (11) are butted with a receiving plate (18). The receiving plate (18) is provided with an arc groove, and the cylinder (14) is placed in the arc groove of the receiving plate (18) after the heat preservation film (13) is completely unfolded.

4. The high-efficiency heat preservation device for agricultural greenhouses according to claim 3, wherein, The shed body (1) is provided with two ventilation openings on both sides, and shutter plates (17) that can be closed are installed on the outer wall of the shed body (1) at the ventilation openings.

5. The high-efficiency heat preservation device for agricultural greenhouses according to claim 1, wherein, Two springs (110) are installed on the inner wall of the slide rail at the upper end of the arc-shaped plate (11). One end of the spring (110) is butted with a square plate (19), and the square plate (19) contacts the slider (15) during winding.

6. The highly efficient heat preservation device for an agricultural greenhouse according to claim 5, wherein Three ball grooves are provided on the bottom surface of the slider (15), and steel balls (113) are installed in the ball grooves. The steel balls (113) replace the bottom surface of the slider (15) and contact the slide rail of the arc-shaped plate (11).

7. The high-efficiency heat preservation device for an agricultural greenhouse according to claim 6, characterized in that, A control panel (111) for driving the electric reel (12) to rotate for winding and unwinding is installed on the inner wall of the shed body (1), and a warning sign (112) is installed on the inner wall of the shed body (1) on one side of the control panel (111).

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