Protection device and protection method for reducing frosting of three-proofing net

Abstract

The invention discloses a protection device and a protection method for reducing frosting of a three-proofing net, and belongs to the technical field of equipment frosting prevention, the protection device comprises an air filter case, and a sunshade net for completely covering the front face and the side face of the three-proofing net is fixedly laid on the outer side of the three-proofing net of the air filter case; the sunshade net is a black woven net; the sunshade net comprises a front net part and side net parts, the front net part is located right in front of the three-proofing net, and the side net parts are located on the left side and the right side of the three-proofing net. The front net part and the side net part are obliquely arranged, and a heat insulation area is formed in front of the three-proofing net through the front net part and the side net part which are obliquely arranged. According to the protection device, an air layer can be formed by laying the black woven sunshade net, and the heat preservation effect can be effectively achieved; sunlight can be shielded in the daytime, loss of ground heat at night can be reduced, the temperature of a heat insulation and preservation area in front of the three-proofing net at night is higher than the surrounding temperature, and finally the frosting phenomenon of the three-proofing net is reduced or avoided.

Description

Technical Field

[0001] The invention relates to the technical field of equipment anti-frost, and in particular to a protective device and a protective method for reducing frost on a three-proof net. Background Art

[0002] It is common for large-scale pig farms to use air filtration as the ventilation method at the air inlet end in spring, autumn and winter. Pig farms in the area north of the Qinling Mountains and the Huaihe River in my country use air filtration modules for ventilation, and frost will appear on the outside of the three-proof net in the air filtration module.

[0003] Among them, the following problems will occur when the three-proof net is frosted:

[0004] 1. It will greatly reduce the air inlet area and increase the negative pressure of the fan;

[0005] Second, the frost on the three-proof net will produce a melting scene at noon, and the melted snow water will penetrate into the primary filter cotton, increasing its internal humidity, reducing the air permeability, and making it easier for bacteria to grow;

[0006] 3. When the humidity reaches a certain level over and over again, moisture or water vapor will be formed as the fan blades rotate, thereby reducing the service life of the fan blades and motor, resulting in serious water accumulation in the rear air duct. Summary of the invention

[0007] The technical problem to be solved by the present invention is to provide a protective device and a protective method for reducing the frost on the three-proof net. The protective device forms an air layer by laying a black woven sunshade net, and the heat-insulating area within the air layer can effectively play a heat-insulating effect; it can block sunlight during the day and reduce the loss of heat from the ground at night, so that the temperature of the heat-insulating area in front of the three-proof net at night is higher than the surrounding temperature, ultimately reducing or avoiding the frost on the three-proof net.

[0008] The technical solution of the present invention is achieved in this way:

[0009] A protective device for reducing frost on a three-proof net, comprising an air filter box, wherein a sunshade net is laid and fixed on the outside of the three-proof net of the air filter box, and the sunshade net fully covers the front and side surfaces of the three-proof net;

[0010] The sunshade net is a black woven net; the sunshade net includes a main net part and a side net part, wherein the main net part is located in front of the three-proof net, and the side net part is located on the left and right sides of the three-proof net;

[0011] The main net part and the side net part are both inclined, and a heat insulation area is formed in front of the three-proof net through the inclined main net part and the side net part.

[0012] By adopting the above scheme, the protective device will form an air layer by laying the black woven sunshade net, and the heat-insulating area within the air layer can effectively play a heat-insulating effect; it can block the sunlight during the day and reduce the heat loss of the ground at night, so that the temperature of the heat-insulating area in front of the three-proof net is higher than the surrounding temperature at night, ultimately reducing or avoiding the frost on the three-proof net.

[0013] As a preferred embodiment of a protective device for reducing frost on a three-proof net, the angle between the main net portion and the vertical plane after laying is 10-20°; the angle between the side net portion and the vertical plane after laying is 10-20°.

[0014] By adopting the above scheme, in order to expand the area of ​​the heat insulation area, the main net part and the side net part are all tilted, and the tilt angle is controlled at 10-20°, which not only expands the heat insulation area, but also the area of ​​the sunshade net used will not be too large.

[0015] As a preferred embodiment of a protective device for reducing frost on a three-proof net, the front net part and the side net part are both composed of an outer contour rope and an inner braided net; wherein the diameter of the outer contour rope is greater than the diameter of the inner braided net;

[0016] The inner braided mesh is a high-density braided mesh, and the mesh aperture of the high-density braided mesh is 2-3mm.

[0017] By adopting the above scheme, in order to achieve better thermal insulation effect, the mesh aperture of the high-density woven mesh is controlled at 2-3mm, which can form an air layer for thermal insulation while isolating a large part of snowflakes.

[0018] As a preferred embodiment of a protective device for reducing frost on the three-proof net, the air filter box is equipped with a guide box top on the top of the three-proof net, wherein the top of the main net part is flipped to the top of the guide box top;

[0019] The guide box top includes a flat-top guide box top and a sloping-top guide box top; the top of the flat-top guide box top is horizontally arranged and flush with the top of the air filter box, and the top of the sloping-top guide box top is tilted downward and slightly lower than the top of the air filter box.

[0020] By adopting the above scheme, in order to achieve full coverage of the top of the air filter case, the top of the main mesh part will be flipped to the top of the guide box; wherein, the guide box top is divided into two types: flat-top guide box top and sloping-top guide box top. The sloping-top guide box top is inclined and lower than the top of the air filter case, so the windward area of ​​the main mesh part will become smaller, and it will be more stable after laying.

[0021] As a preferred embodiment of a protective device for reducing frost on the three-proof net, a row of closed hanging rings are fixedly installed on the top of the guide box, and a row of open hanging rings are fixedly installed on the outer contour ropes of the main net part. The outer contour ropes of the main net part are hung on the closed hanging rings through the open hanging rings.

[0022] By adopting the above scheme, in order to improve the stability of the main net part after being laid, the main net part is fixed by connecting the open hanging ring with the closed hanging ring. At this time, the top of the main net part is not easy to fall off, and its stability after laying is higher.

[0023] As a preferred embodiment of a protective device for reducing frost on a three-proof net, the front net part and the side net part are connected to a traction rope at the bottom of their respective outer contour ropes, and the front net part and the side net part are respectively tied to a positioning assembly riveted to the ground through the traction rope;

[0024] The positioning assembly includes a non-adjustable positioning assembly and an adjustable positioning assembly;

[0025] The non-adjustable positioning assembly includes a positioning seat, which is riveted to the ground through multiple rivets; a closed positioning ring is fixedly installed above the positioning seat, and the traction rope is tied to the closed positioning ring;

[0026] The adjustable positioning assembly includes a positioning seat, which is riveted to the ground by multiple rivets; a closed positioning ring is movably installed above the positioning seat, and the traction rope is tied to the closed positioning ring; a screw is fixed to the bottom of the closed positioning ring, and an N-shaped limit seat fixed to the upper surface of the positioning seat is installed below the screw, wherein the screw completely penetrates the N-shaped limit seat and the positioning seat, and an adjusting nut installed in cooperation with the screw through a thread is limitedly installed in the N-shaped limit seat; a guide rod parallel to the screw is also fixed to the bottom of the closed positioning ring, and the guide rod completely penetrates the positioning seat.

[0027] By adopting the above scheme, in order to facilitate the fixation of the traction rope, the traction rope can be tied to the positioning assembly; the positioning assembly is divided into two types: non-adjustable positioning assembly and adjustable positioning assembly; if the non-adjustable positioning assembly is selected, the tension of the sunshade net cannot be adjusted after being fixed; if the adjustable positioning assembly is selected, when the sunshade net becomes loose due to long-term wind blowing, the position of the closed positioning ring can be adjusted by rotating the adjusting nut, thereby adjusting the tension of the sunshade net, which is more convenient in later maintenance.

[0028] A protective method for reducing frost on a three-proof net, the method is implemented using the protective device for reducing frost on the three-proof net, and the specific operating steps are as follows:

[0029] S1. Lay the main net part of the sunshade net; hang the outer contour rope on the top of the main net part to the closed hanging ring on the top of the guide box through the open hanging ring;

[0030] S2. Fix the main part of the sunshade net; select two positioning components and rivet them to the ground, pull the main part downward through two traction ropes to make the main part tilted, and then tie the tightened traction ropes to the two positioning components;

[0031] S3, laying the side net part of the sunshade net; spreading the side net part to both sides with the main net part as the center;

[0032] S4, fix the side net part of the sunshade net; then select two positioning components to be riveted to the ground, pull the side net part downward through two traction ropes to make the side net part tilted, and then tie the tightened traction ropes to the two positioning components;

[0033] S5. Check the coverage of the entire sunshade net. If the sunshade net has fully covered the front and sides of the three-proof net, the heat insulation area in front of the three-proof net is completed, which can effectively reduce or avoid frost on the three-proof net.

[0034] After adopting the above technical solution, the beneficial effects of the present invention are:

[0035] 1. The protective device forms an air layer by laying a black woven sunshade net. The heat-insulating area within the air layer can effectively keep warm. It can block sunlight during the day and reduce the heat loss from the ground at night, so that the temperature of the heat-insulating area in front of the three-proof net is higher than the surrounding temperature at night, which ultimately reduces or avoids the frost on the three-proof net.

[0036] 2. In order to expand the area of ​​heat insulation, the main net and the side net are all tilted, and the tilt angle is controlled at 10-20°, which not only expands the heat insulation area, but also the area of ​​the sunshade net used will not be too large;

[0037] 3. In order to achieve better thermal insulation effect, the mesh aperture of the high-density woven mesh is controlled at 2-3mm, which can form an air layer for thermal insulation while isolating a large part of the snowflakes;

[0038] 4. In order to achieve full coverage of the top of the air filter box, the top of the main net part will be flipped to the top of the guide box top; the guide box top is divided into two types: flat-top guide box top and inclined-top guide box top. The inclined-top guide box top is set at an angle and is lower than the top of the air filter box. At this time, the windward area of ​​the main net part will become smaller, and it will be more stable after laying;

[0039] 5. In order to improve the stability of the main net after it is laid, the main net is fixed by connecting the open hanging ring with the closed hanging ring. At this time, the top of the main net is not easy to fall off, and its stability after laying is higher;

[0040] 6. In order to facilitate the fixation of the traction rope, the traction rope can be tied to the positioning component; the positioning component is divided into two types: non-adjustable positioning component and adjustable positioning component; if the non-adjustable positioning component is selected, the tension of the sunshade net cannot be adjusted after being fixed; if the adjustable positioning component is selected, when the sunshade net is loosened due to long-term wind blowing, the position of the closed positioning ring can be adjusted by rotating the adjusting nut, thereby adjusting the tension of the sunshade net, which is more convenient in later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0042] Figure 1 It is a front view of the present invention in the first embodiment;

[0043] Figure 2 It is a side view of the present invention in the first embodiment;

[0044] Figure 3 for Figure 1 Schematic diagram of the structure when the middle sunshade net is unfolded;

[0045] Figure 4 for Figure 2 A partial enlarged view of the middle A;

[0046] Figure 5 for Figure 3 A schematic diagram of the structure when a sealed hanging ring is connected to an open hanging ring;

[0047] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0048] Figure 7 for Figure 1 A partial enlarged view of point C in the middle;

[0049] Figure 8 It is a front view of the second embodiment of the present invention;

[0050] Fig. 9 It is a side view of the second embodiment of the present invention;

[0051] Fig.10 for Fig. 9 A partial enlarged view of point D in the middle;

[0052] Fig.11It is a schematic diagram of the structure of the adjustable positioning assembly in the third and fourth embodiments of the present invention.

[0053] Markings in the figure: 1-air filter box; 2-main net part; 3-side net part; 4-outer contour rope; 5-inner woven net; 6-flat top guide box top; 7-sloping top guide box top; 8-closed hanging ring; 9-open hanging ring; 10-traction rope; 11-positioning seat; 12-rivet; 13-closed positioning ring; 14-screw; 15-N-shaped limit seat; 16-adjusting nut; 17-guide rod. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0055] Embodiment 1, as Figure 1 to Figure 2 As shown, a protective device for reducing frost on a three-proof net includes an air filter box 1, and a sunshade net is fixed on the outside of the three-proof net to fully cover the front and sides of the three-proof net; the sunshade net is a black woven net made of polyethylene; the sunshade net includes a main net part 2 and a side net part 3, wherein the main net part 2 is located directly in front of the three-proof net, and the side net part 3 is located on the left and right sides of the three-proof net; the main net part 2 and the side net part 3 are both inclined, and the inclined main net part 2 and the side net part 3 jointly form a heat insulation area in front of the three-proof net. The protective device forms an air layer by laying a black woven sunshade net, and the heat insulation area within the air layer can effectively play a heat preservation effect; it can block sunlight during the day and reduce the heat loss of the ground at night, so that the temperature of the heat insulation area in front of the three-proof net is higher than the surrounding temperature at night, and finally reduces or avoids the frost on the three-proof net.

[0056] like Figure 1 to Figure 2 As shown, the angle between the front net part 2 and the vertical plane after laying is 10-20°; the angle between the side net part 3 and the vertical plane after laying is 10-20°. In order to expand the area of ​​the heat insulation area, the front net part 2 and the side net part 3 are all tilted, and the tilt angle is controlled at 10-20°, which not only expands the heat insulation area, but also does not make the area of ​​the sunshade net too large.

[0057] like Figure 3As shown, the front net part 2 and the side net part 3 are both composed of an outer contour rope 4 and an inner braided net 5; the diameter of the outer contour rope 4 is larger than the diameter of the inner braided net 5; the inner braided net 5 is a high-density braided net, and the mesh aperture of the high-density braided net is 2-3mm. In order to achieve a better thermal insulation effect, the mesh aperture of the high-density braided net is controlled at 2-3mm, which can form an air layer for thermal insulation and isolate a large part of snowflakes.

[0058] like Figure 4 As shown, the air filter case 1 is equipped with a guide box top on the top of its three-proof net, wherein the top of the main net part 2 is flipped to the top of the guide box top; the guide box top is a flat-top guide box top 6, wherein the top of the flat-top guide box top 6 is horizontally arranged and flush with the top of the air filter case 1. In order to achieve full coverage of the top of the air filter case 1, the top of the main net part 2 is flipped to the top of the guide box top.

[0059] like Figures 5 and 6 As shown, a row of closed hanging rings 8 are fixedly installed on the top of the guide box top, and a row of open hanging rings 9 are fixedly installed on the outer contour rope 4 of the main net part 2. The outer contour rope 4 of the main net part 2 is hung on the closed hanging rings 8 through the open hanging rings 9. In order to improve the stability of the main net part 2 after being laid, the main net part 2 is fixed by connecting the open hanging rings 9 with the closed hanging rings 8. At this time, the top of the main net part 2 is not easy to fall off, and its stability after laying is higher.

[0060] like Figure 7 As shown, the main net part 2 and the side net part 3 are connected with a traction rope 10 at the bottom of their respective outer contour ropes 4, and the main net part 2 and the side net part 3 are respectively tied to the positioning assembly riveted to the ground through the traction rope 10; the positioning assembly is a non-adjustable positioning assembly; wherein the non-adjustable positioning assembly includes a positioning seat 11, and the positioning seat 11 is riveted to the ground through multiple rivets 12; a closed positioning ring 13 is fixedly installed above the positioning seat 11, and the traction rope 10 is tied to the closed positioning ring 13. In order to facilitate the fixing of the traction rope 10, the traction rope 10 can be tied to the positioning assembly.

[0061] like Figures 1 to 7 As shown, a protective method for reducing frost on a three-proof net is implemented using the protective device for reducing frost on the three-proof net, and the specific operating steps are as follows:

[0062] S1, laying the main net part 2 of the sunshade net; hanging the outer contour rope 4 at the top of the main net part 2 on the closed hanging ring 8 on the top of the guide box through the open hanging ring 9;

[0063] S2, fix the main net part 2 of the sunshade net; select two positioning components to be riveted to the ground, pull the main net part 2 downward through two traction ropes 10 and make the main net part 2 in an inclined state, and then tie the tightened traction ropes 10 to the two positioning components;

[0064] S3, laying the side net part 3 of the sunshade net; spreading the side net part 3 to both sides with the main net part 2 as the center;

[0065] S4, fix the side net part 3 of the sunshade net; then select two positioning components to be riveted to the ground, pull the side net part 3 downward through two traction ropes 10 and make the side net part 3 tilted, and then tie the tightened traction ropes 10 to the two positioning components;

[0066] S5. Check the coverage of the entire sunshade net. If the sunshade net has fully covered the front and sides of the three-proof net, the heat insulation area in front of the three-proof net is completed, which can effectively reduce or avoid frost on the three-proof net.

[0067] Embodiment 2, as Figures 8 to 10 As shown, the difference between this embodiment and the first embodiment is that: on the basis of the first embodiment, the top of the guide box is replaced with a sloping top guide box top 7, wherein the top of the sloping top guide box top 7 is tilted downward and slightly lower than the top of the air filter box 1. The advantage of the sloping top guide box top 7 is that the sloping top guide box top 7 is tilted and lower than the top of the air filter box 1, so the windward area of ​​the main net part 2 will become smaller, and it will be more stable after laying.

[0068] Embodiment three, as Fig.11 As shown, the difference between this embodiment and the first embodiment is that: on the basis of the first embodiment, the positioning assembly is replaced with an adjustable positioning assembly, wherein the adjustable positioning assembly includes a positioning seat 11, which is riveted to the ground by multiple rivets 12; a closed positioning ring 13 is movably installed above the positioning seat 11, and the traction rope 10 is tied to the closed positioning ring 13; a screw rod 14 is fixed to the bottom of the closed positioning ring 13, and an N-shaped limit seat 15 fixed to the upper surface of the positioning seat 11 is installed below the screw rod 14, wherein the screw rod 14 completely penetrates the N-shaped limit seat 15 and the positioning seat 11, and an adjusting nut 16 installed in cooperation with the screw rod 14 through a thread is installed in the N-shaped limit seat 15; a guide rod 17 parallel to the screw rod 14 is also fixed to the bottom of the closed positioning ring 13, and the guide rod 17 completely penetrates the positioning seat 11. If an adjustable positioning assembly is selected, when the sunshade net becomes loose due to long-term wind blowing, the position of the closed positioning ring 13 can be adjusted by rotating the adjusting nut 16, thereby adjusting the tension of the sunshade net, which is more convenient for later maintenance.

[0069] Embodiment 4, as Fig.11 As shown, the difference between this embodiment and the second embodiment is that: on the basis of the second embodiment, the positioning assembly is replaced with an adjustable positioning assembly, wherein the adjustable positioning assembly includes a positioning seat 11, which is riveted to the ground by multiple rivets 12; a closed positioning ring 13 is movably installed above the positioning seat 11, and the traction rope 10 is tied to the closed positioning ring 13; a screw rod 14 is fixed to the bottom of the closed positioning ring 13, and an N-shaped limit seat 15 fixed to the upper surface of the positioning seat 11 is installed below the screw rod 14, wherein the screw rod 14 completely penetrates the N-shaped limit seat 15 and the positioning seat 11, and an adjusting nut 16 installed in cooperation with the screw rod 14 through a thread is installed in the N-shaped limit seat 15; a guide rod 17 parallel to the screw rod 14 is also fixed to the bottom of the closed positioning ring 13, and the guide rod 17 completely penetrates the positioning seat 11. If an adjustable positioning assembly is selected, when the sunshade net becomes loose due to long-term wind blowing, the position of the closed positioning ring 13 can be adjusted by rotating the adjusting nut 16, thereby adjusting the tension of the sunshade net, which is more convenient for later maintenance.

[0070] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A protective device for reducing frost on a three-proof net, comprising an air filter case (1), wherein a sunshade net is laid and fixed on the outside of the three-proof net of the air filter case (1) to fully cover the front and side surfaces of the three-proof net; Features: The sunshade net is a black woven net; the sunshade net comprises a front net portion (2) and a side net portion (3), wherein the front net portion (2) is located directly in front of the three-defense net, and the side net portion (3) is located on the left and right sides of the three-defense net; The main net part (2) and the side net part (3) are both arranged obliquely, and a heat-insulating area is formed in front of the three-proof net by the inclined main net part (2) and the side net part (3).

2. The protective device for reducing frost on the three-proof net according to claim 1, characterized in that: After being laid, the angle between the main net part (2) and the vertical plane is 10-20°; after being laid, the angle between the side net part (3) and the vertical plane is 10-20°.

3. The protective device for reducing frost on the three-proof net according to claim 2, characterized in that: The main net part (2) and the side net part (3) are both composed of an outer contour rope (4) and an inner braided net (5); wherein the diameter of the outer contour rope (4) is greater than the diameter of the inner braided net (5).

4. The protective device for reducing frost on the three-proof net according to claim 3, characterized in that: The inner braided net (5) is a high-density braided net, and the mesh aperture of the high-density braided net is 2-3 mm.

5. The protective device for reducing frost on the three-proof net according to claim 4, characterized in that: The air filter box (1) is provided with a flow guide box top on the top of the three-protection net, wherein the top of the main net part (2) is flipped over to the top of the flow guide box top.

6. The protective device for reducing frost on the three-proof net according to claim 5, characterized in that: The guide box top comprises a flat-top guide box top (6) and a sloping-top guide box top (7); wherein the top of the flat-top guide box top (6) is arranged horizontally and is flush with the top of the air filter case (1), and wherein the top of the sloping-top guide box top (7) is arranged tilted downward and is slightly lower than the top of the air filter case (1).

7. The protective device for reducing frost on the three-proof net according to claim 6, characterized in that: A row of closed hanging rings (8) are fixedly installed on the top of the guide box, and a row of open hanging rings (9) are fixedly installed on the outer contour rope (4) of the main net part (2), and the outer contour rope (4) of the main net part (2) is hung on the closed hanging rings (8) through the open hanging rings (9).

8. The protective device for reducing frost on the three-proof net according to claim 7, characterized in that: The main net part (2) and the side net part (3) are both connected to a traction rope (10) at the bottom of their respective outer contour ropes (4), and the main net part (2) and the side net part (3) are respectively tied to a positioning component riveted to the ground through the traction rope (10).

9. The protective device for reducing frost on the three-proof net according to claim 8, characterized in that: The positioning assembly includes a non-adjustable positioning assembly and an adjustable positioning assembly; The non-adjustable positioning assembly comprises a positioning seat (11), the positioning seat (11) being riveted to the ground via a plurality of rivets (12); a closed positioning ring (13) is fixedly mounted above the positioning seat (11), and the traction rope (10) is tied to the closed positioning ring (13); The adjustable positioning assembly comprises a positioning seat (11), wherein the positioning seat (11) is riveted to the ground through a plurality of rivets (12); a closed positioning ring (13) is movably mounted above the positioning seat (11), and the traction rope (10) is tied to the closed positioning ring (13); a screw rod (14) is fixed at the bottom of the closed positioning ring (13), and an N-shaped limiting seat (15) fixed to the upper surface of the positioning seat (11) is mounted below the screw rod (14), wherein the screw rod (14) completely penetrates the N-shaped limiting seat (15) and the positioning seat (11), and an adjusting nut (16) is mounted in cooperation with the screw rod (14) through a thread in the N-shaped limiting seat (15); a guide rod (17) parallel to the screw rod (14) is also fixed at the bottom of the closed positioning ring (13), and the guide rod (17) completely penetrates the positioning seat (11).

10. A method for reducing frost on a three-proof net, characterized in that: The method is implemented by using the protective device for reducing frost on the three-proof net according to claim 9, and the specific operating steps are as follows: S1, laying the main net part (2) of the sunshade net; hanging the outer contour rope (4) at the top of the main net part (2) on the closed hanging ring (8) on the top of the guide box through the open hanging ring (9); S2, fix the main net part (2) of the sunshade net; select two positioning components and rivet them on the ground, pull the main net part (2) downward through two traction ropes (10) to make the main net part (2) tilted, and then tie the tightened traction ropes (10) to the two positioning components; S3, laying the side net part (3) of the sunshade net; spreading the side net part (3) to both sides with the main net part (2) as the center; S4, fixing the side net part (3) of the sunshade net; then selecting two positioning components to be riveted to the ground, pulling the side net part (3) downwards through two traction ropes (10) to make the side net part (3) in an inclined state, and then tying the tightened traction ropes (10) to the two positioning components; S5. Check the coverage of the entire sunshade net. If the sunshade net has fully covered the front and sides of the three-proof net, the heat insulation area in front of the three-proof net is completed, which can effectively reduce or avoid frost on the three-proof net.

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