Sunshade device for planting between greenhouses

Abstract

The utility model relates to the technical field of agricultural greenhouses, in particular to a sunshade device for planting between greenhouses, which is characterized in that firstly, a sunshade net is erected between two adjacent greenhouses through a support component, so that the sunshade requirement inside the greenhouses is met, the sunshade of planting areas between the greenhouses is also considered, and the occupied space in front of the greenhouses is also reduced; secondly, an illumination and temperature control assembly is arranged on the greenhouse to adjust the sunshade degree of the sunshade net; in this way, the occupied space in front of the greenhouse is reduced, the land utilization rate is increased, meanwhile, the sunshade requirements of the greenhouse and the planting area between the greenhouses are met, the sunshade degree can be adjusted according to the actual illumination and temperature conditions, and optimization of the crop growth environment is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of agricultural greenhouse, specifically relates to a shading device for greenhouse inter-planting. BACKGROUND

[0002] The shading net is generally made of high-density polyethylene or polypropylene and has certain reflection and absorption capacity for sunlight, which can reduce the sunlight irradiation and heat transfer to a certain extent. Specifically, the shading net reduces the time and intensity of direct sunlight on the ground by reflecting and scattering sunlight, thereby reducing the heat received by the ground. At the same time, the shading net can also filter out some ultraviolet rays to avoid the influence of ultraviolet rays on the growth of crops in the greenhouse, thereby protecting the crops in the greenhouse.

[0003] Due to the difference in light demand of the planted crops, the shading net is usually installed in the greenhouse. By controlling the shading net, the amount of sunlight entering the greenhouse is adjusted to control the light and regulate the temperature.

[0004] The traditional shading net laying method is to complete the winding or releasing of the shading net by manual operation, which is time-consuming and laborious and very troublesome.

[0005] To solve the above problems, the Chinese utility model patent with application number 201920224132.0 discloses a shading net roller blind device, which is characterized by: the shading net is located outside the greenhouse, and the device further comprises a winding and unwinding mechanism arranged on the ground, a fixed horizontal rod arranged at the top of the greenhouse, and a plurality of fixed pulley mechanisms and fixed ropes connecting the winding and unwinding mechanism and the fixed horizontal rod. The winding and unwinding mechanism comprises two parallel support columns, a motor, and a rotating rod and a third horizontal rod located between the two support columns. The third horizontal rod is located above the rotating rod, and the ends of the rotating rod are connected with the support columns. One end of the rotating rod is fixedly connected with the output shaft of the motor, and the two ends of the third horizontal rod are fixedly connected with the two support columns. A plurality of fixed rigging are arranged on the third horizontal rod in intervals, and the number of fixed rigging corresponds to the number of fixed pulley mechanisms. The rotating rod is driven to rotate by the motor, and cooperates with the fixed pulley mechanisms to realize the winding or releasing of the shading net.

[0006] However, the above-mentioned prior art has the following technical problems: a certain gap is usually left between two adjacent greenhouses to ensure that the crops can obtain sufficient light, and crops are also planted on the land between the greenhouses to avoid waste of land. However, the above-mentioned shading net roller blind device cannot realize shading for inter-planting crops, and the winding and unwinding mechanism arranged on the ground occupies a large amount of space, greatly reducing the land utilization rate. UTILITY MODEL CONTENT

[0007] Therefore, it is necessary to provide a shading device for greenhouse inter-planting to realize shading of inter-planting crops and improve land utilization.

[0008] The utility model provides a shading device for greenhouse inter-planting, which comprises a supporting assembly, a retracting assembly, a shading net, and a plurality of guide assemblies and pulley assemblies.

[0009] The supporting assembly comprises front and rear supporting mechanisms, which are respectively arranged on the top of two adjacent greenhouses.

[0010] Preferably, the front and rear supporting mechanisms each comprise a top crossbar, a middle crossbar, and a plurality of supporting vertical bars.

[0011] Preferably, the guide assembly comprises a fixed screw and a guide steel wire rope.

[0012] Preferably, the front and rear supporting mechanisms each further comprise a plurality of tensioning mechanisms.

[0013] Preferably, the retracting assembly comprises a rotating mechanism, a retracting steel wire rope, and a rotating rod. The rotating mechanism comprises a driving module and a speed reduction module. The driving module and the speed reduction module are fixedly arranged on the top of the greenhouse. The driving module is drivingly connected with the speed reduction module. The retracting steel wire rope is wound around the pulley assembly and is fixed at both ends and wound on the rotating rod in opposite directions. One end of the rotating rod is connected with the speed reduction module, and the other end is free. The driving module is used to drive the rotating rod to rotate, so as to wind or release the retracting steel wire rope.

[0014] Preferably, the rotating rod comprises a winding rod and a threaded rod, the winding rod is coaxially connected with the threaded rod, a plurality of pairs of winding and unwinding steel wire rope fixing holes are arranged on the winding rod to fix and install the winding and unwinding steel wire rope, and the threaded rod is threadedly connected with the speed reduction module to drive the winding rod to rotate and wind or release the winding and unwinding steel wire rope while moving along the axial direction.

[0015] Preferably, the pulley assembly comprises a first fixed pulley and two second fixed pulleys, the first fixed pulley is fixedly installed on the top horizontal rod of the rear support mechanism, the two second fixed pulleys are both fixedly installed on the top horizontal rod of the front support mechanism, the first fixed pulley and the second fixed pulley are in the same height, the winding and unwinding steel wire rope is wound on the first fixed pulley, one end of the winding and unwinding steel wire rope is wound over the second fixed pulley, winds several turns on the winding rod, and is fixedly installed on the winding rod through the winding and unwinding steel wire rope fixing hole, and the other end of the winding and unwinding steel wire rope is wound over the other second fixed pulley, reversely winds several turns on the winding rod, and is fixedly installed on the winding rod through the winding and unwinding steel wire rope fixing hole.

[0016] Preferably, the winding and unwinding steel wire rope is further fixedly connected with the free end of the sunshade net to pull the sunshade net to move along the guide steel wire rope.

[0017] Preferably, a plurality of rows of sliding rings are arranged in parallel on the sunshade net to sleeve the sunshade net on the guide steel wire rope.

[0018] Preferably, the sunshade device for inter- greenhouse planting further comprises a light and temperature control assembly, the light and temperature control assembly comprises a light sensor and a temperature sensor, the temperature sensor is arranged inside and between the greenhouses to detect the temperature inside and between the greenhouses, the light sensor is arranged on the side wall of the greenhouse and between the greenhouses at equal intervals to detect the light intensity inside and between the greenhouses and the difference of different positions on the horizontal plane, and the light sensor and the temperature sensor are both electrically connected with the driving module to adjust the sunshade degree of the sunshade net above the greenhouse and the inter- greenhouse according to the collected light and temperature information.

[0019] In the above-mentioned sunshade device for inter- greenhouse planting, firstly, the sunshade net is erected between two adjacent greenhouses through the support assembly, which not only meets the sunshade demand inside the greenhouse, but also takes into account the sunshade of the inter- greenhouse planting area and reduces the occupation of the space in front of the greenhouse; secondly, the light and temperature control assembly is arranged on the greenhouse to adjust the sunshade degree of the sunshade net; in this way, not only the occupation of the space in front of the greenhouse is reduced and the land utilization rate is improved, but also the sunshade demand of the greenhouse and the inter- greenhouse planting area is met, and the sunshade degree can be adjusted according to the actual light and temperature conditions to ensure the optimization of the growth environment of crops. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a structure schematic view of the sunshade device for greenhouse inter-planting.

[0021] Figure 2 It is a partial enlarged schematic view of the sunshade device for greenhouse inter-planting.

[0022] Figure 3 It is a partial enlarged schematic view of the sunshade device for greenhouse inter-planting from another perspective.

[0023] Figure 4 It is a structure schematic view of the front support mechanism.

[0024] Figure 5 It is a structure schematic view of the top horizontal rod.

[0025] Figure 6 It is a structure schematic view of the winding and unwinding assembly.

[0026] Figure 7 It is a structure schematic view of the rotating rod.

[0027] Figure 8 It is a structure schematic view of the sunshade net.

[0028] Figure 9 It is a structure schematic view of the guide assembly.

[0029] Figure 10 It is a schematic view of the pulley assembly and the winding and unwinding steel wire rope.

[0030] In the figure: the sunshade device for greenhouse inter-planting 10, the greenhouse 11, the support assembly 12, the front support mechanism 121, the rear support mechanism 122, the top horizontal rod 1211, the guide assembly mounting hole 12111, the middle horizontal rod 1212, the support vertical rod 1213, the tensioning mechanism 1214, the winding and unwinding assembly 13, the rotating mechanism 131, the driving module 1311, the speed reduction module 1312, the winding and unwinding steel wire rope 132, the rotating rod 133, the winding rod 1331, the winding and unwinding steel wire rope fixing hole 13311, the threaded rod 1332, the sunshade net 14, the slip ring 141, the guide assembly 15, the fixed screw rod 151, the guide steel wire rope 152, the pulley assembly 16, the first fixed pulley 161, the second fixed pulley 162. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings described in the following are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0032] Please refer to Figures 1 to 10 The utility model provides a greenhouse big shed interplanting sunshade device 10, including two adjacent greenhouses 11, support subassembly 12, take out and put subassembly 13, sunshade net 14 and a plurality of guide subassembly 15 and pulley assembly 16,

[0033] Support subassembly 12 includes front support mechanism 121 and rear support mechanism 122, is respectively erected at the top of two adjacent greenhouses 11 to reduce the occupation of the space before the shed, a plurality of guide subassembly 15 are connected front support mechanism 121 and rear support mechanism 122 respectively, one end of sunshade net 14 is fixed on rear support mechanism 122, and the other end is a free end, is slidably installed on guide subassembly 15, a plurality of pulley assembly 16 are fixedly installed on support subassembly 12, take out and put subassembly 13 are fixedly installed at the top of greenhouse 11 and are fixedly connected with the free end of sunshade net 14, are used for cooperating with pulley assembly 16 to retract or release sunshade net 14 along guide subassembly 15.

[0034] In the embodiment, greenhouse big shed interplanting sunshade device 10 is particularly applicable to large-scale greenhouse 11 planting of the greenhouse big shed. By support subassembly 12, sunshade net 14 is erected between two adjacent greenhouses 11, which not only meets the sunshade demand of greenhouse 11, but also takes into account the sunshade of the interplanting area, and reduces the occupation of the space before the shed. In this way, not only the occupation of the space before the shed is reduced, the land utilization rate is improved, but also the sunshade demand of greenhouse 11 and the interplanting area is met.

[0035] Further, front support mechanism 121 and rear support mechanism 122 all include top cross bar 1211, middle cross bar 1212 and a plurality of support vertical bars 1213, the plurality of support vertical bars 1213 are rotatably installed at the top of greenhouse 11 at one end at equal intervals, and the other end is a free end, top cross bar 1211 is fixedly installed at the free end of support vertical bar 1213 and is perpendicular to support vertical bar 1213, top cross bar 1211 is provided with guide subassembly mounting hole 12111 at equal intervals, middle cross bar 1212 is fixedly installed at the middle of support vertical bar 1213 and is parallel to top cross bar 1211, a plurality of guide subassembly 15 are connected top cross bar 1211 in front support mechanism 121 and rear support mechanism 122 respectively through guide subassembly mounting hole 12111.

[0036] Further, guide subassembly 15 includes fixed screw 151 and guide steel wire rope 152, both ends of guide steel wire rope 152 are connected with fixed screw 151, and fixed screw 151 is screwed with guide subassembly mounting hole 12111 respectively to connect top cross bar 1211 in front support mechanism 121 and rear support mechanism 122.

[0037] In the embodiment, through the screw thread cooperation of the fixing screw 151 and the guide assembly mounting hole 12111, not only the front support mechanism 121 is connected with the top cross bar 1211 of the rear support mechanism 122 by the guide steel wire rope 152, but also the tension degree of the guide steel wire rope 152 can be accurately adjusted by rotating the fixing screw 151.

[0038] Further, the front support mechanism 121 and the rear support mechanism 122 further comprise a plurality of tensioning mechanisms 1214, the plurality of tensioning mechanisms 1214 are arranged at equal intervals, and one end of each of the plurality of tensioning mechanisms 1214 is rotatably installed on the middle cross bar 1212, and the other end is rotatably installed on the greenhouse 11, so as to adjust the tension degree of the guide steel wire rope 152 through the tensioning mechanism 1214.

[0039] In the embodiment, the setting of the tensioning mechanism 1214 can preliminarily adjust the tension degree of the guide steel wire rope 152, and compared with the adjustment of the fixing screw 151, the adjustment range of the tensioning mechanism 1214 is larger.

[0040] It is worth noting that in the embodiment, the tensioning mechanism 1214 and the plurality of support vertical rods 1213 are respectively rotatably connected with the cross bar and the steel beam in the greenhouse 11 through the pin shaft, the tensioning mechanism 1214, the support vertical rod 1213 and the steel beam form a triangular structure, so as to not only improve the stability and strength of the support assembly 12, but also facilitate installation and disassembly.

[0041] Further, the retractable assembly 13 comprises a rotating mechanism 131, a retractable steel wire rope 132 and a rotating rod 133, the rotating mechanism 131 comprises a driving module 1311 and a speed reduction module 1312, the driving module 1311 and the speed reduction module 1312 are both fixedly installed on the top of the greenhouse 11, the driving module 1311 and the speed reduction module 1312 are transmissionally connected, the retractable steel wire rope 132 is wound around the pulley assembly 16, and both ends of the retractable steel wire rope 132 are fixed and oppositely wound on the rotating rod 133, one end of the rotating rod 133 is connected with the speed reduction module 1312, and the other end is a free end, and the driving module 1311 is used to drive the rotating rod 133 to rotate, so as to wind or release the retractable steel wire rope 132.

[0042] In the embodiment, the driving module 1311 can be a motor, and the winding and releasing of the retractable steel wire rope 132 can be realized by controlling the forward and reverse rotation of the motor, and in order to ensure the stable operation of the driving module 1311, a limit switch can also be arranged to prevent mechanical damage caused by excessive winding or releasing of the retractable steel wire rope 132.

[0043] Further, the rotating rod 133 comprises a winding rod 1331 and a threaded rod 1332, the winding rod 1331 is coaxially connected with the threaded rod 1332, a plurality of pairs of winding and releasing steel wire rope fixing holes 13311 are arranged on the winding rod 1331 to fix and install the winding and releasing steel wire rope 132, and the threaded rod 1332 is threadedly connected with the speed reduction module 1312 to drive the winding rod 1331 to rotate and release the winding and releasing steel wire rope 132 while moving along the axial direction.

[0044] In the embodiment, when the rotating mechanism 131 drives the threaded rod 1332 to rotate, the threads of the threaded rod 1332 and the threads of the rotating mechanism 131 are matched with each other, so that the threaded rod 1332 moves along the axial direction and drives the winding rod 1331 to rotate and release the winding and releasing steel wire rope 132 while moving, which ensures that the winding and releasing steel wire rope 132 will not be mixed and abraded during the winding and releasing process, thereby prolonging the service life of the device.

[0045] Further, the pulley assembly 16 comprises a first fixed pulley 161 and two second fixed pulleys 162, the first fixed pulley 161 is fixedly installed on the top cross rod 1211 of the rear supporting mechanism 122, the two second fixed pulleys 162 are both fixedly installed on the top cross rod 1211 of the front supporting mechanism 121, the first fixed pulley 161 and the second fixed pulley 162 are in the same height, the winding and releasing steel wire rope 132 is arranged on the first fixed pulley 161, one end of the winding and releasing steel wire rope 132 passes through the second fixed pulley 162, winds several turns on the winding rod 1331, and is fixedly installed on the winding rod 1331 through the winding and releasing steel wire rope fixing hole 13311, and the other end of the winding and releasing steel wire rope 132 passes through the other second fixed pulley 162, reversely winds several turns on the winding rod 1331, and is fixedly installed on the winding rod 1331 through the winding and releasing steel wire rope fixing hole 13311.

[0046] In the embodiment, one end of the rotating rod 133 is connected with the rotating mechanism 131 through threads, and the other end is a free end, the winding and releasing steel wire rope 132 passes through the first and second fixed pulleys 162 and is fixedly installed on the rotating rod 133 at both ends. By means of the weight of the rotating rod 133 itself, the elastic tension of the winding and releasing steel wire rope 132 can be realized.

[0047] It is worth noting that the winding directions of both ends of the winding and releasing steel wire rope 132 must be opposite, so as to ensure that one end of the winding and releasing steel wire rope 132 winds on the winding rod 1331 and the other end releases from the winding rod 1331 during the winding and releasing process.

[0048] Further, the winding and releasing steel wire rope 132 is also fixedly connected with the free end of the sunshade net 14 to pull the sunshade net 14 to move along the guide steel wire rope 152, so as to realize the unfolding and folding of the sunshade net 14.

[0049] Further, a plurality of slide rings 141 are arranged in parallel on the sunshade net 14 to wrap the sunshade net 14 on the guide steel wire rope 152.

[0050] In this embodiment, the sunshade net 14 is installed on the guide steel wire rope 152 through a series of sliding rings 141, so that the sunshade net 14 is more smooth when it is unfolded and rolled up, and the friction damage to the sunshade net 14 is reduced. The use of the sliding ring 141 not only improves the service life of the sunshade net 14, but also ensures the stability of the sunshade net 14 during movement.

[0051] It is worth noting that the material of the sliding ring 141 is usually selected to be corrosion-resistant and wear-resistant to adapt to the humid and dusty environment in the greenhouse 11. In actual application, the spacing of the sliding ring 141 can be flexibly adjusted according to the width of the sunshade net 14 and the length of the greenhouse 11 to achieve the best sunshade effect and use efficiency.

[0052] In another embodiment, the sunshade net 14 can also be directly connected with the winding and unwinding steel wire rope 132 without using the sliding ring 141, thereby simplifying the structure and reducing the maintenance cost. In this case, the two ends of the sunshade net 14 are directly connected with the winding and unwinding steel wire rope 132, and the expansion and contraction of the winding and unwinding steel wire rope 132 is used to control the unfolding and rolling up of the sunshade net 14. In order to ensure the stability of the sunshade net 14 during movement, a reinforcing belt can be provided at the edge of the sunshade net 14. The connection between the reinforcing belt and the winding and unwinding steel wire rope 132 is more firm, and the reinforcing belt can also bear greater tension.

[0053] Further, the sunshade device 10 for greenhouse inter-planting also includes a light and temperature control assembly. The light and temperature control assembly includes a light sensor and a temperature sensor. The temperature sensor is arranged inside and between the greenhouses 11 to detect the temperature inside and between the greenhouses 11. The light sensor is arranged at equal intervals on the side walls of the greenhouses 11 and between the greenhouses to detect the light intensity inside and between the greenhouses 11. The light sensor and the temperature sensor are electrically connected with the driving module 1311 to adjust the sunshade degree of the sunshade net 14 above the greenhouses 11 and between the greenhouses according to the collected light and temperature information.

[0054] In this embodiment, the driving module 1311 automatically controls the opening and closing of the sunshade net 14 according to the data provided by the light sensor and the temperature sensor, so as to achieve the ideal light and temperature conditions. When it is detected that the light intensity in the greenhouse and the shed exceeds the preset value, the driving module 1311 will automatically drive the rotating mechanism 131 to expand the sunshade net 14, reduce the direct sunlight, and reduce the temperature in the greenhouse and the shed. Conversely, when the light intensity is lower than the preset value, the driving module 1311 will drive the rotating mechanism 131 to retract the sunshade net 14 to increase the light. Similarly, if the temperature sensor detects that the temperature in the greenhouse and the shed is too high, the driving module 1311 will also adjust the position of the sunshade net 14 accordingly to reduce the temperature. Through this adjustment mechanism, the light and temperature in the greenhouse and the shed can be effectively maintained within the range suitable for plant growth, thereby improving the yield and quality of crops.

[0055] Of course, the sunshade device 10 for greenhouse shed planting in this embodiment can also be provided with a user interface, through which the user can manually adjust the position of the sunshade net 14 and set the threshold values of light and temperature. The user interface can be a touch screen or a button control panel, which is convenient for the user to operate according to actual needs and experience. At the same time, the system also has a fault diagnosis function. When the system detects an abnormal condition, such as the sunshade net 14 being stuck or the sensor being faulty, the system will issue a warning through the user interface and provide corresponding fault information, so that the user can timely maintain and repair.

[0056] In the implementation of the utility model, the staff needs to start the driving module 1311, then the driving module 1311 rotates, the rotating mechanism 131 starts to work, drives the threaded rod 1332 to rotate, and then makes the winding rod 1331 rotate and move along the axial direction, and the steel wire rope 132 is wound or released, so as to control the sunshade net 14 to expand or contract along the guide steel wire rope 152. This not only meets the sunshade needs of the greenhouse shed 11 and the shed planting area at the same time, significantly improves the land utilization rate, but also avoids the breakage of the steel wire rope due to the inclusion of wear and tear, and prevents the problem of equipment damage and inability to use.

[0057] The modules or units in the device embodiment of the utility model can be combined, divided and reduced according to actual needs. The above disclosure is only the preferred embodiment of the utility model, and of course cannot limit the scope of the utility model, and those skilled in the art can understand that all or part of the processes of the above embodiments are implemented, and equivalent changes made according to the utility model claims still belong to the scope covered by the utility model.

Claims

1. A sunshade device for use in a greenhouse, characterized in that: The support assembly, the retracting and releasing assembly, the sunshade net, and the plurality of guide assemblies and pulley assemblies are included. The support assembly includes front and rear support mechanisms respectively erected on the top of two adjacent greenhouse sheds, the plurality of guide assemblies are respectively connected to the front and rear support mechanisms, one end of the sunshade net is fixed to the rear support mechanism, and the other end is a free end and is slidingly installed on the guide assemblies, the plurality of pulley assemblies are fixedly installed on the support assembly, and the retracting and releasing assembly is fixedly installed on the top of the greenhouse shed and is fixedly connected to the free end of the sunshade net, and is used for cooperating with the pulley assemblies to retract or release the sunshade net along the guide assemblies.

2. The shading device for use in a greenhouse according to claim 1, characterized in that: The front and rear support mechanisms each include a top crossbar, a middle crossbar, and a plurality of support vertical bars, one end of each of the plurality of support vertical bars is rotationally installed at an equal interval on the top of the greenhouse shed, the other end is a free end, the top crossbar is fixedly installed at the free end of the support vertical bar and is perpendicular to the support vertical bar, the top crossbar is provided with guide assembly mounting holes at an equal interval, the middle crossbar is fixedly installed at the middle of the support vertical bar and is parallel to the top crossbar, and the plurality of guide assemblies are respectively connected to the top crossbars in the front and rear support mechanisms through the guide assembly mounting holes.

3. The shading device for use in a greenhouse according to claim 2, characterized in that: The guide assembly includes a fixed screw and a guide steel wire rope, both ends of the guide steel wire rope are connected to the fixed screw, and the fixed screw is threadedly connected to the guide assembly mounting hole to connect the top crossbars in the front and rear support mechanisms.

4. The shading device for use in a greenhouse according to claim 3, characterized in that: The front and rear support mechanisms further include a plurality of tensioning mechanisms, the plurality of tensioning mechanisms are provided at an equal interval, one end of each of the plurality of tensioning mechanisms is rotationally installed on the middle crossbar, and the other end is rotationally installed on the greenhouse shed, so as to adjust the tensioning degree of the guide steel wire rope through the tensioning mechanisms.

5. The sun shading device for use in a greenhouse according to claim 1, characterized in that: The retracting and releasing assembly includes a rotating mechanism, a retracting and releasing steel wire rope, and a rotating rod, the rotating mechanism includes a driving module and a speed reduction module, the driving module and the speed reduction module are fixedly installed on the top of the greenhouse shed, are transmissionally connected between the driving module and the speed reduction module, the retracting and releasing steel wire rope is wound around the pulley assembly, both ends of the retracting and releasing steel wire rope are fixed and are oppositely wound on the rotating rod, one end of the rotating rod is connected to the speed reduction module, and the other end is a free end, and the driving module is used for driving the rotating rod to rotate, so as to wind or release the retracting and releasing steel wire rope.

6. A shading device for use in a greenhouse according to claim 5, characterized in that: The rotating rod includes a winding rod and a threaded rod, the winding rod is coaxially connected to the threaded rod, a plurality of pairs of retracting and releasing steel wire rope fixing holes are provided on the winding rod to fixedly install the retracting and releasing steel wire rope, and the threaded rod is threadedly connected to the speed reduction module, so as to drive the winding rod to rotate, wind or release the retracting and releasing steel wire rope, and move along the axial direction at the same time.

7. A shading device for use in a greenhouse according to claim 6, characterized in that: The pulley assembly comprises a first fixed pulley and two second fixed pulleys, the first fixed pulley is fixedly installed on the top cross bar of the rear support mechanism, the two second fixed pulleys are both fixedly installed on the top cross bar of the front support mechanism, the first fixed pulley and the second fixed pulley are in the same height, the winding and unwinding steel wire rope is wound on the first fixed pulley, one end of the winding and unwinding steel wire rope is wound over the second fixed pulley, winds several turns on the winding rod, and is fixedly installed on the winding rod through the winding and unwinding steel wire rope fixing hole, the other end of the winding and unwinding steel wire rope is wound over the other second fixed pulley, reversely winds several turns on the winding rod, and is fixedly installed on the winding rod through the winding and unwinding steel wire rope fixing hole.

8. A shading device for use in a greenhouse according to claim 7, characterized in that: The winding and unwinding steel wire rope is also fixedly connected with the free end of the sunshade net to pull the sunshade net to move along the guide steel wire rope.

9. The shading device for use in a greenhouse according to claim 3, characterized in that: A plurality of sliding rings are arranged in parallel on the sunshade net to wrap the sunshade net on the guide steel wire rope.

10. The shading device for use in a greenhouse according to claim 5, characterized in that: The sunshade device for greenhouse inter-planting further comprises a light and temperature control assembly, the light and temperature control assembly comprises a light sensor and a temperature sensor, the temperature sensor is arranged inside and between the greenhouses to detect the temperature inside and between the greenhouses, the light sensor is arranged on the side walls of the greenhouses and between the greenhouses at equal intervals to detect the light intensity, the difference of different positions on the horizontal plane, and the light sensor and the temperature sensor are electrically connected with the driving module to adjust the sunshade degree of the sunshade net above the greenhouses and between the greenhouses according to the collected light and temperature information.

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