A greenhouse shed with excellent heat preservation effect

Abstract

The utility model relates to a greenhouse big shed with excellent heat preservation effect. It includes outer shed and inner shed, the inner shed is by steel structure framework, aluminium foil curtain and winding subassembly constitute, the steel structure framework is by arcuate rod, keel and pull rod constitute, the winding subassembly includes speed reducer, transmission shaft, two winding shafts, driving gear, driven gear, driving sprocket, driven sprocket and chain belt, the aluminium foil curtain is wound on the winding shaft, the end of aluminium foil curtain is connected with counterweight rod, the arcuate rod is movably sleeved with sliding sleeve, the sliding sleeve is equipped with the clamping portion, the steel structure framework is equipped with clockwork winding drum, the clockwork winding drum is connected with the steel cable between the sliding sleeve. The utility model provides the tension in the initial stage of aluminium foil curtain unfolding through winding subassembly control aluminium foil curtain's unfolding or folding, simultaneously matches the steel cable and clockwork winding drum, to guarantee that aluminium foil curtain can unfold smoothly.

Description

Technical Field

[0001] This utility model relates to a plastic film greenhouse, and more particularly to a greenhouse with excellent heat preservation effect. Background Technology

[0002] Arched plastic film greenhouses are a common type of plastic greenhouse in southern China. The frame of this type of greenhouse is generally composed of several arched rods, joists, and tie rods, with an overall structure similar to the thoracic vertebrae of an animal. These greenhouses occupy a large area, have excellent heat absorption, are easy to build, and have relatively low construction costs. However, because they only have a single-layer film structure and lack a significant heat storage structure, heat loss is relatively rapid at night. To further improve its insulation effect, one existing solution is to install an inner greenhouse within the plastic film greenhouse, consisting of an inner frame and aluminum foil curtains. During the day, the aluminum foil curtains are retracted, not affecting sunlight. At night, the aluminum foil curtains are fully extended, covering the inner frame. At this time, the heat radiation emitted from the ground can be blocked by the aluminum foil curtains, slowing down the rate of heat loss. However, how to efficiently and conveniently extend and retract the aluminum foil curtains remains a pressing technical problem to be solved. Summary of the Invention

[0003] This invention provides a greenhouse with excellent heat preservation effect; and solves the problem of how to efficiently and conveniently unfold and retract aluminum foil curtains in the prior art.

[0004] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: A greenhouse with excellent heat preservation effect includes an outer greenhouse and an inner greenhouse. The inner greenhouse is composed of a steel structure frame, aluminum foil curtain and a winding assembly. The steel structure frame is composed of arched rods, keels and tie rods. The tie rods are fixedly connected between the arched rods, and the keels are fixed to the top of the arched rods. The winding assembly includes a geared motor, a drive shaft and two winding shafts mounted and fixed on the keels. The keels are also provided with mounting seats. The drive shafts are rotatably mounted on the mounting seats. Two rotating shaft seats are symmetrically provided on the arched rods. The winding shafts are rotatably mounted on the rotating shaft seats. The output shaft of the geared motor is provided with a drive gear. The drive shaft is provided with a driven gear of the same size that meshes with the drive gear. Both the output shaft of the geared motor and the drive shaft are provided with... The system includes a drive sprocket and two driven sprockets on each of the two winding shafts. A chain connects the drive sprocket and the driven sprocket. The aluminum foil curtain is wound onto the winding shaft, and a counterweight is connected to the end of the aluminum foil curtain. The counterweight overlaps the outside of the arched rod. A sliding sleeve is movably fitted on the upper half of the arched rod, and a limiting block is also provided. The sliding sleeve has a locking part. A spring winding drum is provided on the steel structure frame. A steel cable connects the spring winding drum and the sliding sleeve. Under the reset effect of the spring winding drum, the steel cable can pull the sliding sleeve downward until it abuts against the limiting block. When the winding shaft is in the winding state, the counterweight slides upward along the outside of the arched rod until it abuts against the locking part on the sliding sleeve and drives the sliding sleeve to slide upward synchronously, thereby pulling the steel cable and causing the spring winding drum to be in the unwinding state.

[0005] The winding assembly in this invention is used to control the winding and unwinding of the aluminum foil curtain. When the aluminum foil curtain is in the unwinding state, it is tightly covered by the outer side of the arched rod under the action of the counterweight. After the winding program is started, the reduction motor runs, and the driven gear and the driving gear rotate synchronously in opposite directions. Under the transmission of the chain belt, the two driven sprockets and the two winding shafts rotate synchronously in opposite directions, thus starting to wind up the aluminum foil curtain. The counterweight moves slowly from bottom to top along the outer side of the arched rod. When the counterweight moves to abut against the locking part, the sliding sleeve is synchronously pulled upward by the counterweight, and the steel cable is also pulled out at the same time, so that the spring winding drum is in the unwinding state until the aluminum foil curtain is wound up. The foil curtain is fully retracted; conversely, the unwinding process is initiated, the geared motor reverses, and the two winding shafts simultaneously begin unwinding. Since the spring winding drum has been in the unwinding state and has its own reset function, the steel cable is always taut. When the aluminum foil curtain begins to unwind, the steel cable pulls the counterweight rod, ensuring that the aluminum foil curtain remains taut. As the steel cable pulls, when the sliding sleeve abuts against the limit block again, the counterweight rod loses the pulling effect of the steel cable. However, the tension generated by the weight of the counterweight rod is sufficient to keep the aluminum foil curtain taut, so the aluminum foil curtain can continue to unfold until it completely covers the inner canopy.

[0006] The longitudinal length of the inner tent often starts at tens of meters, which cannot be met by the size of a single aluminum foil curtain. Therefore, this utility model adopts the method of splicing multiple aluminum foil curtains for covering. Each inner tent needs to be equipped with multiple winding components to meet the winding and unwinding operations of multiple aluminum foil curtains.

[0007] Furthermore, several pieces of Teflon tape are adhered to the back of the aluminum foil curtain, and the positions of the Teflon tapes correspond one-to-one with the arched rods. During each unfolding and retraction of the aluminum foil curtain, friction occurs with the arched rods. To prevent wear on this part of the aluminum foil curtain, this invention uses Teflon tape in these areas to prevent wear. Teflon tape has excellent wear resistance and can also reduce friction.

[0008] Therefore, this utility model has the following characteristics compared with the prior art: 1. This utility model controls the unfolding or retraction of the aluminum foil curtain through a winding assembly, and at the same time, it is equipped with a steel cable and a spring winding drum to provide tension in the initial stage of unfolding the aluminum foil curtain, so as to ensure that the aluminum foil curtain can be unfolded smoothly. Attached Figure Description

[0009] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] Appendix Figure 2 This is a schematic diagram of the winding assembly;

[0011] Appendix Figure 3 This is a structural diagram of the sliding sleeve, steel cable, and mainspring winding drum;

[0012] Appendix Figure 4 This is a partial top view of the present invention;

[0013] Appendix Figure 5 This is a structural schematic diagram of the steel frame. Detailed Implementation

[0014] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0015] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0016] Example 1: See Figure 1 and Figure 4 A greenhouse with excellent heat preservation effect includes an outer shed 100 and an inner shed 200. The inner shed is composed of a steel frame 210, an aluminum foil curtain 220, and a roll-up assembly 230. The steel frame is composed of arched rods 211, keels 212, and tie rods 213 (see...). Figure 5 The tie rods are fixedly connected between the arched rods, and the keel is fixed to the top of the arched rods. At least two tie rods are provided on each side, and the spacing between adjacent arched rods is between 1 and 2 meters. The winding assembly includes a geared motor 231, a drive shaft 232, and two winding shafts 233, all mounted and fixed on the keel. A mounting base 234 is also provided on the keel, and the drive shaft is rotatably mounted on the mounting base. Two symmetrical rotating shaft seats 235 are provided on the arched rods, and the winding shafts are rotatably mounted on the rotating shaft seats. A drive gear 236 is provided on the output shaft of the geared motor, and a driven gear 237 of equal size meshing with the drive gear is provided on the drive shaft. Both the output shaft of the geared motor and the drive shaft are provided with drive sprockets 238, and both winding shafts are provided with driven sprockets 239. A chain belt connects the drive sprockets and the driven sprockets (see [link]). Figure 2The number of teeth on the driving sprocket is much smaller than that on the driven sprocket. The aluminum foil curtain is wound onto a winding shaft. A counterweight 221 is connected to the end of the aluminum foil curtain. The counterweight 221 overlaps the outside of the arched rod. A sliding sleeve 240 is movably fitted on the upper half of the arched rod, and a limiting block 250 is also provided. If the position is appropriate, the limiting block can be one of the pull rods. The sliding sleeve has a locking part 241. A spring winding drum 260 is provided on the steel structure frame. A steel cable 270 is connected between the spring winding drum and the sliding sleeve. The steel cable can pull the sliding sleeve down until it abuts against the limiting block under the reset effect of the spring winding drum (see...). Figure 3 When the winding shaft is in the winding state, the counterweight bar will slide upward along the outside of the arched bar until it abuts against the locking part on the sliding sleeve and drives the sliding sleeve to slide upward synchronously, thereby pulling the steel cable and causing the winding drum to be in the unwinding state.

[0017] In this embodiment, the winding assembly is used to control the winding and unwinding of the aluminum foil curtain. When the aluminum foil curtain is in the unwinding state, it is tightly covered by the outside of the arched rod under the action of the counterweight. After the winding program is started, the reduction motor runs, and the driven gear and the driving gear rotate synchronously in opposite directions. Under the transmission of the chain belt, the two driven sprockets and the two winding shafts rotate synchronously in opposite directions, thereby starting to wind up the aluminum foil curtain. The counterweight moves slowly from bottom to top along the outside of the arched rod. When the counterweight moves to abut against the locking part, the sliding sleeve is pulled upward synchronously by the counterweight, and the steel cable is also pulled out at the same time, so that the spring winding drum is in the unwinding state until the aluminum foil... The curtain is fully retracted; conversely, the unwinding process is initiated, the geared motor reverses, and the two winding shafts simultaneously begin unwinding. Since the winding drum has been in an unwinding state and has a self-resetting effect, the steel cable remains taut. When the aluminum foil curtain begins to unwind, the steel cable pulls the counterweight, ensuring the aluminum foil curtain remains taut. As the steel cable pulls, when the sliding sleeve contacts the limit block again, the counterweight loses the pulling effect of the steel cable. However, the tension generated by the weight of the counterweight is sufficient to keep the aluminum foil curtain taut, allowing it to continue unfolding until it completely covers the inner canopy.

[0018] This embodiment uses a method of splicing multiple aluminum foil curtains for coverage. Each inner tent needs to be equipped with multiple winding components to meet the winding and unwinding operations of multiple aluminum foil curtains.

[0019] Specifically, several pieces of Teflon tape are adhered to the back of the aluminum foil screen, with each piece of Teflon tape corresponding to one of the arched rods. During each unfolding and retraction of the aluminum foil screen, friction occurs between the screen and the arched rods. To prevent wear on this part of the screen, this embodiment uses Teflon tape in these areas. Teflon tape has excellent wear resistance and also reduces friction.

[0020] See Figure 4Two aluminum foil screens are usually connected to a single counterweight rod. In order to ensure that the aluminum foil screens do not shift significantly during the unfolding and retraction process, the counterweight rod is equipped with several limiting discs 222. The limiting discs are located on both sides of the arched rod to guide and position the screens.

[0021] See Figure 3 The spring winding drum is installed at the upper end of the arched rod, and a guide wheel 280 is provided on the arched rod and below the limiting block. The steel cable is set around the guide wheel.

[0022] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A greenhouse with excellent heat preservation effect, comprising an outer greenhouse and an inner greenhouse, characterized in that: The inner canopy consists of a steel frame, aluminum foil curtain, and a winding assembly. The steel frame comprises arched rods, keels, and tie rods. The tie rods are fixedly connected between the arched rods, and the keels are fixed to the top of the arched rods. The winding assembly includes a geared motor, a drive shaft, and two winding shafts mounted on the keels. The keels also have mounting seats, and the drive shafts are rotatably mounted on the mounting seats. Two symmetrical pivot seats are provided on the arched rods, and the winding shafts are rotatably mounted on the pivot seats. The output shaft of the geared motor has a drive gear, and the drive shaft has a driven gear of the same size that meshes with the drive gear. Both the output shaft of the geared motor and the drive shaft have drive sprockets, and both winding shafts have driven sprockets. A chain is connected between the wheel and the driven sprocket. The aluminum foil curtain is wound onto the winding shaft. A counterweight is connected to the end of the aluminum foil curtain. The counterweight overlaps the outside of the arched rod. A sliding sleeve is movably fitted on the upper half of the arched rod, and a limiting block is also provided. The sliding sleeve has a locking part. A spring winding drum is provided on the steel structure frame. A steel cable is connected between the spring winding drum and the sliding sleeve. Under the reset effect of the spring winding drum, the steel cable can pull the sliding sleeve downward until it abuts against the limiting block. When the winding shaft is in the winding state, the counterweight will slide upward along the outside of the arched rod until it abuts against the locking part on the sliding sleeve and drives the sliding sleeve to slide upward synchronously, thereby pulling the steel cable and causing the spring winding drum to be in the unwinding state.

2. The greenhouse with excellent heat preservation effect according to claim 1, characterized in that: Several Teflon tapes are attached to the back of the aluminum foil curtain, and the positions of the Teflon tapes correspond one-to-one with the arched rods.

3. The greenhouse with excellent heat preservation effect according to claim 1 or 2, characterized in that: The counterweight rod is equipped with several limiting discs, which are located on both sides of the arched rod.

4. The greenhouse with excellent heat preservation effect according to claim 1, characterized in that: The spring winding drum is installed at the upper end of the arched rod, and a guide wheel is provided on the arched rod and below the limiting block. The steel cable is arranged to pass around the guide wheel.

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