Plant cold-proof device

Abstract

The invention discloses a plant cold-proof device, and belongs to the technical field of cold-proof devices, the plant cold-proof device comprises two wind-proof plates, the bottoms of the two wind-proof plates are hinged, the wind-proof plates are semicircular, and a plurality of second ventilation holes are formed in the outer walls of the wind-proof plates; the fixing mechanism is used for fixing the two windproof plates; the sealing mechanism is mounted in the windproof plate; the driving mechanism is used for driving the sealing mechanism; the connecting mechanism is used for fixing the driving mechanism; the resetting mechanism is used for driving the sealing mechanism to reset; when wind blows, the branches swing, and the driving mechanism drives the sealing mechanism to move. The device has the beneficial effects that the branches are sealed when wind blows, the cold-proof effect of the branches is improved, and when wind stops, the branches can be ventilated through the reset mechanism, so that the influence of long-term sealing on the growth of plants is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of cold protection devices, and in particular to a plant cold protection device. Background Art

[0002] A plant cold protection device is a device or material designed to help plants resist low-temperature damage in cold seasons. It usually includes physical cold protection methods, heating-type cold protection devices, structural cold protection facilities, spraying antifreeze agents for freezing prevention, etc. Among them, common physical cold protection methods include covering with heat-insulating materials, wrapping tree trunks, and building temporary warm greenhouses.

[0003] Currently, existing plant cold protection devices usually use the methods of covering with heat-insulating materials and wrapping tree trunks for cold protection. Mainly, grass, linen, non-woven fabric, plastic film, foam board, etc. are directly covered on the surface of plants or around the roots to reduce heat dissipation and block cold wind, thereby achieving the effect of cold protection;

[0004] However, for plant cold protection devices similar to the above, their operations are relatively cumbersome. When using the method of wrapping with plastic film for cold protection, the air permeability is poor, affecting plant growth. While the methods of wrapping with grass, linen, and non-woven fabric have certain air permeability, continuous air permeability greatly reduces the heat preservation effect, thereby reducing the cold protection effect of plants. Summary of the Invention

[0005] One of the purposes of the present application is to solve the problem that the cold protection device cannot ensure good heat preservation effect while maintaining air permeability for plants, and to provide a plant cold protection device.

[0006] To achieve the above purpose, the technical solution adopted in the present application is: a plant cold protection device, including: two wind-proof plates: the bottoms of the two wind-proof plates are hinged, and the wind-proof plates are semi-circular. A plurality of second ventilation holes are opened on the outer wall of the wind-proof plates; a fixing mechanism: the fixing mechanism is used to fix the two wind-proof plates; a sealing mechanism: the sealing mechanism is installed inside the wind-proof plates; a driving mechanism: the driving mechanism is used to drive the sealing mechanism; a connecting mechanism: the connecting mechanism is used to fix the driving mechanism; a reset mechanism: the reset mechanism is used to drive the sealing mechanism to reset; when the wind blows, the branches swing, and the driving mechanism drives the sealing mechanism to move, so that the sealing mechanism blocks the second ventilation holes. When the wind stops, the reset mechanism drives the sealing mechanism to move to release the blockage of the second ventilation holes.

[0007] Preferably, the fixing mechanism includes four fixing plates. The four fixing plates are respectively fixedly connected to the two sides of the tops of the two wind-proof plates. One ends of the two fixing plates on the same side are rotatably provided with first bolts through threads.

[0008] Preferably, the sealing mechanism includes a swing plate. A swing groove is formed inside the windproof plate. The swing plate is slidably arranged on the inner wall of the swing groove. A first ventilation hole is formed in the outer wall of the swing plate, and the first ventilation hole corresponds to the second ventilation hole.

[0009] Preferably, the sealing mechanism further includes a mounting frame fixedly connected to the outer wall of the windproof plate. A connection port is formed in the outer wall of the windproof plate, and the mounting frame corresponds to the mounting frame. A driving gear and a connecting gear that are meshed with each other are rotatably arranged on the inner walls of both sides of the mounting frame. A driving tooth groove is formed in the outer wall of the swing plate, and the driving tooth groove is meshed with the driving gear.

[0010] Preferably, rotating shafts are rotatably connected to the inner walls of both sides of the mounting frame. A one-way bearing is rotatably arranged on the outer wall of the rotating shaft, and the connecting gear is arranged on the outer wall of the one-way bearing.

[0011] Preferably, the driving mechanism includes connecting rods connected to both ends of the rotating shaft. The bottoms of the four connecting rods are rotatably connected to the same connecting plate. A fixing block is fixedly connected to the bottom of the connecting plate. A rolling groove is formed in the bottom of the fixing block. A rotating ball is rollingly arranged on the inner wall of the rolling groove, and a driving rod is fixedly connected to the bottom of the rotating ball.

[0012] Preferably, the connecting mechanism is fixedly connected to one end of the driving rod. The connecting mechanism includes a connecting block fixedly connected to one end of the driving rod. Hoop brackets are hinged to both ends of the connecting block. A mounting plate is fixedly arranged at one end of the hoop bracket. A threaded hole is formed in one side of the mounting plate, and the same second bolt is threadedly connected to the inner walls of the two threaded holes.

[0013] Preferably, the reset mechanism includes a reset rod rotatably connected to one end of the swing groove. A connection groove adapted to the reset rod is formed at one end of the swing plate. A reset spring is fixedly connected between the swing plate and the swing groove. A sliding plate is fixedly arranged on the inner wall of the connection groove. A sliding groove is formed in the outer wall of the reset rod, and the sliding plate is slidably connected in the sliding groove.

[0014] Preferably, a spiral groove is formed in the outer wall of the reset rod, and the spiral groove is adapted to the sliding plate. A hinge plate is hinged at the intersection of the spiral groove and the sliding groove. A plurality of limiting grooves are formed in the inner wall of the spiral groove, and a limiting plate is inserted into the inner wall of the limiting groove. The limiting plate is fixedly arranged between the limiting plate and the hinge plate. A plurality of limiting blocks are fixedly arranged on the inner wall of the spiral groove. The limiting blocks are hemispherical, and the limiting blocks are made of rubber material.

[0015] Preferably, one end of the connecting rod is provided with a rotating groove, the circumferential inner wall of the rotating groove is equidistantly provided with movable grooves, the inner wall of the movable groove is slidably provided with extrusion balls, a compression spring is fixedly arranged between the extrusion balls and the movable grooves, and a plurality of limiting sliding grooves corresponding to the movable grooves are arranged on the circumferential outer wall of the rotating shaft, and the limiting sliding grooves are arc-shaped.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows:

[0017] (1) When in use, first cover the two wind-proof plates on the tree branches that need to keep warm, and then rotate the first bolt to fix the two wind-proof plates. Subsequently, pull the hoop and clamp the hoop on the main trunk of the tree, and rotate the second bolt to fix the hoop. When the wind blows, the branches shake, the connecting plate is pulled by the driving rod to move, thereby driving the connecting rod to swing. When the connecting rod swings, the rotating shaft is driven to swing, and the connecting gear is driven to rotate in one direction through the one-way bearing. The connecting gear drives the transmission gear to rotate, and then the swing plate is driven to move through the transmission tooth groove, so that the reset rod is inserted into the connecting groove, and the sliding plate moves in the sliding groove, so that the first ventilation hole and the second ventilation hole are staggered, sealing the branch part, which can seal and keep warm the branches in strong wind and prevent the branches from getting cold. When the swing plate cannot move any further, under the elastic force of the compression spring, the extrusion ball is pushed to contract into the movable groove, so that the rotating shaft remains stationary. When the wind stops, under the elastic force of the reset spring, the swing plate can be pushed to reset. At this time, under the limiting action of the hinge plate, the sliding plate slowly moves in the spiral groove, so that the reset rod rotates, and then the first ventilation hole corresponds to the second ventilation hole. At this time, the air permeability of the branches is increased, so as to achieve sealing of the branches in windy weather, increasing the cold protection effect of the branches, and when the wind stops, the branches can be ventilated through the reset mechanism, avoiding affecting the growth of plants due to long-term sealing.

[0018] (2) Through the arc-shaped limiting sliding groove, the extrusion ball can slide a certain distance in the limiting sliding groove, thereby preventing the branches from shaking slightly and sealing the branches, and further avoiding sealing the branches in gentle wind. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the first perspective of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the second perspective of the present invention.

[0021] Figure 3 It is a partial side sectional structural schematic diagram of the sealing mechanism of the present invention.

[0022] Figure 4 It is a partial three-dimensional structural schematic diagram of the driving mechanism of the present invention.

[0023] Figure 5 This is a partial three-dimensional structural schematic diagram of the spiral groove and the reset rod of the present invention.

[0024] Figure 6 This is a partial side sectional structural schematic diagram of the spiral groove and the limit block of the present invention.

[0025] Figure 7 This is a partial side sectional structural schematic diagram of the swing plate and the connecting groove of the present invention.

[0026] Figure 8 This is a partial three-dimensional structural schematic diagram of the connecting mechanism of the present invention.

[0027] Figure 9 For the present invention Figure 4 The enlarged structural schematic diagram at position A in it.

[0028] Figure 10 This is a partial side sectional structural schematic diagram of the rotating shaft and the one-way bearing of the present invention;

[0029] Figure 11 This is a partial side sectional structural schematic diagram of the extrusion spring and the extrusion ball of the present invention.

[0030] In the figure: 1, windproof plate; 2, fixing mechanism; 201, fixing plate; 202, first bolt; 3, connecting mechanism; 301, connecting block; 302, hoop; 303, mounting plate; 304, second bolt; 305, threaded hole; 4, driving mechanism; 401, connecting rod; 402, connecting plate; 403, fixing block; 404, rotating ball; 405, driving rod; 5, sealing mechanism; 501, swing plate; 502, swing groove; 503, first ventilation hole; 504, second ventilation hole; 505, mounting bracket; 506, transmission tooth groove; 507, transmission gear; 508, connecting gear; 510, rotating shaft; 511, one-way bearing; 512, rotating groove; 513, movable groove; 514, extrusion spring; 515, extrusion ball; 516, limit sliding groove; 6, reset mechanism; 601, reset spring; 602, reset rod; 603, spiral groove; 604, sliding groove; 605, sliding plate; 606, hinge plate; 607, limit groove; 608, limit plate; 609, limit block; 610, connecting groove. Detailed implementation manners

[0031] Next, in combination with the specific implementation manners, the present application will be further described. It should be noted that, on the premise of no conflict, any combination can be formed between the following described embodiments or technical features to form a new embodiment.

[0032] In the description of the present application, it should be noted that for the orientation terms, such as the terms "center", "horizontal", "vertical", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence.

[0034] One of the preferred embodiments of the present application is, as Figures 1 to 11 shown, a plant cold protection device, including: two wind protection plates 1: the bottoms of the two wind protection plates 1 are hinged, and the wind protection plates 1 are semicircular. A plurality of second ventilation holes 504 are provided on the outer wall of the wind protection plates 1;

[0035] A fixing mechanism 2: the fixing mechanism 2 is used to fix the two wind protection plates 1; a sealing mechanism 5: the sealing mechanism 5 is installed inside the wind protection plates 1; a driving mechanism 4: the driving mechanism 4 is used to drive the sealing mechanism 5; a connecting mechanism 3: the connecting mechanism 3 is used to fix the driving mechanism 4; a reset mechanism 6: the reset mechanism 6 is used to drive the sealing mechanism 5 to reset; when the wind blows, the branches swing, and the driving mechanism 4 drives the sealing mechanism 5 to move, so that the sealing mechanism 5 blocks the second ventilation holes 504. When the wind stops, the reset mechanism 6 drives the sealing mechanism 5 to move to release the blockage of the second ventilation holes 504.

[0036] Referring to Figure 1 , the fixing mechanism 2 includes four fixing plates 201. The four fixing plates 201 are respectively fixedly connected to the two sides of the tops of the two wind protection plates 1. One ends of the two fixing plates 201 on the same side are rotatably provided with first bolts 202 through threads. Through the fixing plates 201 and the first bolts 202, the two wind protection plates 1 can be quickly fixed so that they can be sleeved on the plant branches.

[0037] Referring to Figure 3 and Figure 4The sealing mechanism 5 includes a swing plate 501, a swing groove 502 is provided inside the windproof plate 1, the swing plate 501 is slidably arranged on the inner wall of the swing groove 502, and a first ventilation hole 503 is provided on the outer wall of the swing plate 501, and the first ventilation hole 503 corresponds to the second ventilation hole 504. The first ventilation hole 503 and the second ventilation hole 504 correspond and stagger, so that the branches and trunks are ventilated and sealed; the sealing mechanism 5 also includes a mounting frame 505 fixedly connected to the outer wall of the windproof plate 1, and the outer wall of the windproof plate 1 A connecting port is provided on the wall, and the mounting frame 505 corresponds to the mounting frame 505. The inner walls on both sides of the mounting frame 505 are rotatably provided with meshing transmission gears 507 and connecting gears 508. A transmission tooth groove 506 is provided on the outer wall of the swing plate 501. The transmission tooth groove 506 meshes with the transmission gear 507. The transmission gear 507 is driven to rotate through the connecting gear 508, and then the swing plate 501 is driven to move through the transmission tooth groove 506, so that the first ventilation hole 503 and the second ventilation hole 504 are staggered.

[0038] Reference Figure 10 The inner walls on both sides of the mounting frame 505 are rotatably connected with a rotating shaft 510, and the outer wall of the rotating shaft 510 is rotatably provided with a one-way bearing 511, and the connecting gear 508 is provided on the outer wall of the one-way bearing 511. Through the one-way bearing 511, the connecting gear 508 can rotate in only one direction, thereby making the swing plate 501 move in only one direction.

[0039] Reference Figure 2 and Figure 4 The driving mechanism 4 includes connecting rods 401 connected to both ends of the rotating shaft 510. The bottoms of the four connecting rods 401 are rotatably connected to the same connecting plate 402. The bottom of the connecting plate 402 is fixedly connected to a fixed block 403. A rolling groove is provided at the bottom of the fixed block 403. A rotating ball 404 is rollingly provided on the inner wall of the rolling groove. The bottom of the rotating ball 404 is fixedly connected to a driving rod 405. The driving rod 405 drives the connecting plate 402 to move, thereby driving the connecting rod 401 to swing, and then causing the connecting gear 508 to rotate.

[0040] Reference Figure 2 and Figure 8 The connecting mechanism 3 is fixedly connected to one end of the driving rod 405, and the connecting mechanism 3 includes a connecting block 301 fixedly connected to one end of the driving rod 405. Both ends of the connecting block 301 are hinged with clamps 302, and one end of the clamp 302 is fixedly provided with a mounting plate 303. A threaded hole 305 is opened on one side of the mounting plate 303. The inner walls of the two threaded holes 305 are threadedly connected with the same second bolt 304. Through the clamp 302, the mounting plate 303 and the second bolt 304, it is convenient to quickly fix it to the trunk of the plant.

[0041] Reference Figure 3 , Figure 5 ,Figure 6 and Figure 7 The reset mechanism 6 includes a reset rod 602 rotatably connected to one end of the swing groove 502. A connection groove 610 adapted to the reset rod 602 is provided at one end of the swing plate 501. A reset spring 601 is fixedly connected between the swing plate 501 and the swing groove 502. A sliding plate 605 is fixedly arranged on the inner wall of the connection groove 610. A chute 604 is provided on the outer wall of the reset rod 602. The sliding plate 605 is slidably connected in the chute 604. The swing plate 501 can be driven to reset by the reset rod 602, the connection groove 610 and the reset spring 601. When the swing plate 501 moves driven by the driving mechanism 4, it quickly moves to one end of the reset rod 602. A spiral groove 603 is provided on the outer wall of the reset rod 602. The spiral groove 603 is adapted to the sliding plate 605. An articulated plate 606 is hinged at the intersection of the spiral groove 603 and the chute 604. A plurality of limiting grooves 607 are provided on the inner wall of the spiral groove 603. A limiting plate 608 is inserted into the inner wall of the limiting groove 607. The limiting plate 608 is fixedly arranged with the articulated plate 606. A plurality of limiting blocks 609 are fixedly arranged on the inner wall of the spiral groove 603. The limiting blocks 609 are hemispherical and the limiting blocks 609 are made of rubber material. Through the spiral groove 603, the sliding plate 605 can be preliminarily limited after the swing plate 501 moves, and the friction between the sliding plate 605 and the spiral groove 603 is increased by the rubber material limiting blocks 609, so as to limit the moved swing plate 501. When the swing plate is reset, the sliding plate 605 can slowly move in the spiral groove 603. The sliding plate 605 can be limited by the limiting plate 608 and the articulated plate 606, so that the sliding plate 605 moves in the spiral groove 603.

[0042] Referring to Figure 11 , a rotating groove 512 is provided at one end of the connecting rod 401. The circumferential inner wall of the rotating groove 512 is equidistantly provided with movable grooves 513. An extrusion ball 515 is slidably arranged on the inner wall of the movable groove 513. An extrusion spring 514 is fixedly arranged between the extrusion ball 515 and the movable groove 513. A plurality of limiting sliding grooves 516 corresponding to the movable grooves 513 are provided on the circumferential outer wall of the rotating shaft 510. The limiting sliding grooves 516 are arc-shaped. Through the extrusion ball 515 and the extrusion spring 514, when the swing plate 501 cannot move, the extrusion ball 515 contracts into the movable groove 513, so that the connecting rod 401 cannot drive the rotating shaft 510 to rotate, and the arc-shaped limiting sliding grooves 516 enable the extrusion ball 515 to slide a certain distance in the limiting sliding grooves 516, so as to avoid the slight shaking of the branch and seal the branch, and further avoid the sealing of the branch in the gentle breeze.

[0043] Working principle: When in use, first cover the two wind-proof plates 1 on the tree branches that need to be protected from cold, and then rotate the first bolt 202 to fix the two wind-proof plates 1. Subsequently, pull the hoop 302 and clamp the hoop 302 on the main trunk of the tree, and rotate the second bolt 304 to fix the hoop 302. When the wind blows, the branches shake, and the connecting plate 402 is pulled to move through the driving rod 405, thereby driving the connecting rod 401 to swing. When the connecting rod 401 swings, the rotating shaft 510 is driven to swing, and the connecting gear 508 is driven to rotate in one direction through the one-way bearing 511. The connecting gear 508 drives the transmission gear 507 to rotate, and then drives the swing plate 501 to move through the transmission tooth groove 506, so that the reset rod 602 is inserted into the connecting groove 610, and the sliding plate 605 moves in the sliding groove 604, so that the first ventilation hole 503 is staggered from the second ventilation hole 504, sealing the branch part, which can seal and keep warm the branches in strong winds and protect the branches from cold. When the swing plate 501 can no longer move, under the elastic force of the compression spring 514, the compression ball 515 is pushed to contract into the movable groove 513, so that the rotating shaft 510 remains stationary. When the wind stops, under the elastic force of the reset spring 601, the swing plate 501 can be pushed to reset. At this time, under the limiting action of the hinge plate 606, the sliding plate 605 slowly moves in the spiral groove 603, so that the reset rod 602 rotates, and then the first ventilation hole 503 corresponds to the second ventilation hole 504. At this time, the air permeability of the branches is increased, so as to achieve sealing of the branches when the wind blows and improve the cold protection effect of the branches. When the wind stops, the reset mechanism 6 can make the branches breathable, avoiding affecting the growth of plants due to long-term sealing.

[0044] The above describes the basic principle, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A plant cold protection device, characterized in that, Comprising: Two windshields (1): The bottoms of the two windshields (1) are hinged, and the windshields (1) are semi-circular. A plurality of second ventilation holes (504) are provided on the outer wall of the windshields (1); Fixing mechanism (2): The fixing mechanism (2) is used to fix the two windshields (1); Sealing mechanism (5): The sealing mechanism (5) is installed inside the windshields (1); Driving mechanism (4): The driving mechanism (4) is used to drive the sealing mechanism (5); Connecting mechanism (3): The connecting mechanism (3) is used to fix the driving mechanism (4); Reset mechanism (6): The reset mechanism (6) is used to drive the sealing mechanism (5) to reset; When the wind blows, the branches swing, and the driving mechanism (4) drives the sealing mechanism (5) to move, so that the sealing mechanism (5) blocks the second ventilation holes (504). When the wind stops, the reset mechanism (6) drives the sealing mechanism (5) to move to release the blockage of the second ventilation holes (504).

2. The plant cold protection device according to claim 1, characterized in that: The fixing mechanism (2) includes four fixing plates (201). The four fixing plates (201) are respectively fixedly connected to both sides of the tops of the two windshields (1). One ends of the two fixing plates (201) on the same side are rotatably provided with first bolts (202) through threads.

3. The plant cold protection device according to claim 1, characterized in that: The sealing mechanism (5) includes a swing plate (501). A swing groove (502) is provided inside the windshields (1). The swing plate (501) is slidably arranged on the inner wall of the swing groove (502). A first ventilation hole (503) is provided on the outer wall of the swing plate (501), and the first ventilation hole (503) corresponds to the second ventilation hole (504).

4. The plant cold protection device according to claim 3, characterized in that: The sealing mechanism (5) further includes a mounting bracket (505) fixedly connected to the outer wall of the windshields (1). A connection port is provided on the outer wall of the windshields (1), which corresponds to the mounting bracket (505). Meshing transmission gears (507) and connection gears (508) are rotatably arranged on both inner walls of the mounting bracket (505). A transmission tooth groove (506) is provided on the outer wall of the swing plate (501), and the transmission tooth groove (506) meshes with the transmission gear (507).

5. The plant cold protection device according to claim 4, characterized in that: Both inner walls of the mounting bracket (505) are rotatably connected with a rotating shaft (510). A one-way bearing (511) is rotatably arranged on the outer wall of the rotating shaft (510), and the connection gear (508) is arranged on the outer wall of the one-way bearing (511).

6. The plant cold protection device according to claim 5, characterized in that: The driving mechanism (4) includes connecting rods (401) connected to both ends of the rotating shaft (510). The bottoms of the four connecting rods (401) are rotatably connected to the same connecting plate (402). A fixing block (403) is fixedly connected to the bottom of the connecting plate (402). A rolling groove is provided at the bottom of the fixing block (403), and a rotating ball (404) is rollingly arranged on the inner wall of the rolling groove. A driving rod (405) is fixedly connected to the bottom of the rotating ball (404).

7. The plant cold protection device according to claim 6, characterized in that: The connecting mechanism (3) is fixedly connected to one end of the driving rod (405). The connecting mechanism (3) includes a connecting block (301) fixedly connected to one end of the driving rod (405). Hoop clamps (302) are hinged to both ends of the connecting block (301). A mounting plate (303) is fixedly arranged at one end of the hoop clamp (302). A threaded hole (305) is formed in one side of the mounting plate (303). The inner walls of the two threaded holes (305) are threadedly connected with the same second bolt (304).

8. The plant cold protection device according to claim 7, characterized in that: The reset mechanism (6) includes a reset rod (602) rotatably connected to one end of the swing groove (502). A connecting groove (610) adapted to the reset rod (602) is formed at one end of the swing plate (501). A reset spring (601) is fixedly connected between the swing plate (501) and the swing groove (502). A sliding plate (605) is fixedly arranged on the inner wall of the connecting groove (610). A sliding groove (604) is formed in the outer wall of the reset rod (602). The sliding plate (605) is slidably connected in the sliding groove (604).

9. The plant cold protection device according to claim 8, characterized in that: A spiral groove (603) is formed in the outer wall of the reset rod (602). The spiral groove (603) is adapted to the sliding plate (605). A hinge plate (606) is hinged at the intersection of the spiral groove (603) and the sliding groove (604). A plurality of limiting grooves (607) are formed in the inner wall of the spiral groove (603). A limiting plate (608) is inserted into the inner wall of the limiting groove (607). The limiting plate (608) is fixedly arranged with the hinge plate (606). A plurality of limiting blocks (609) are fixedly arranged on the inner wall of the spiral groove (603). The limiting blocks (609) are hemispherical, and the limiting blocks (609) are made of rubber material.

10. The plant cold protection device according to claim 9, wherein: A rotating groove (512) is formed at one end of the connecting rod (401). A plurality of activity grooves (513) are equidistantly formed in the circumferential inner wall of the rotating groove (512). An extrusion ball (515) is slidably arranged on the inner wall of the activity groove (513). An extrusion spring (514) is fixedly connected between the extrusion ball (515) and the activity groove (513). A plurality of limiting sliding grooves (516) corresponding to the activity grooves (513) are formed in the circumferential outer wall of the rotating shaft (510). The limiting sliding grooves (516) are arc-shaped.

Images