CN216362756U

CN216362756U - Fixed plant model device in wind tunnel

Info

Publication number: CN216362756U
Application number: CN202123314601.4U
Authority: CN
Inventors: 邱晓娜; 付贵全; 徐先英; 满多清; 张裕年; 王强强; 杨雪梅; 尚雯
Original assignee: Gansu Desert Control Research Institute
Current assignee: Gansu Desert Control Research Institute
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-04-26
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses a plant model fixing device in a wind tunnel, which comprises a fixing component, wherein the fixing component comprises two plant clamps and a straight cylinder, the plant clamps are positioned at the top of the straight cylinder, and the bottom end of the straight cylinder is fixedly connected with a magnetic block; the lifting assembly comprises a first sliding rod and a second sliding rod, the first sliding rod and the second sliding rod are respectively and fixedly connected with a plurality of first connecting rods, a support is arranged between the first connecting rods, and the straight cylinder is positioned in the support; the supporting component comprises two frames which are symmetrically arranged, a first sliding hole and a second sliding hole which are parallel to each other are arranged in the frames, a first sliding rod is arranged in the first sliding hole in a penetrating mode and is connected with the first sliding hole in a sliding mode, a second sliding rod is arranged in the second sliding hole in a penetrating mode and is connected with the second sliding hole in a sliding mode, a plurality of reinforcing rods are fixedly connected between the two frames, and idler wheels are arranged at the bottom ends of the frames. The device has simple structure and convenient use, can be repeatedly used for many times, and meets the requirement of a wind tunnel experiment on fixing a plant model.

Description

Fixed plant model device in wind tunnel

Technical Field

The utility model relates to the technical field of shelter forest research, in particular to a device for fixing a plant model in a wind tunnel.

Background

The plant sand control is an efficient, rapid and durable desertification control measure. The research on the plant desertification control effect mainly adopts wind tunnel experiments, field observation and numerical simulation methods. However, the field observation research is influenced by factors such as soil characteristics, small terrain, vegetation change during observation, soil surface condition and the like, vegetation cannot be isolated, and the research result has high specificity, so that a general conclusion is difficult to draw. As a supplementary method for field observation and research, a wind tunnel test can simplify a complex system, is an effective means for researching the transport relationship between vegetation and wind sand under a control condition, and is an important method for solving the problem of specific wind erosion.

How to fix the plant model in the wind tunnel is a precondition for accurately developing the research on the transportation relation between vegetation and wind sand, and the current commonly used methods include the following 3 methods: firstly, according to research contents, calculating two-dimensional coordinates of the height and the space of a plant model on a board with a certain area; folding the lower half part of the plant model into an L shape; thirdly, fixing the plant model on the wood board by using an air nail gun according to the coordinates in the first step; fourthly, manually lifting the wood board for fixing the plant model into the wind tunnel; fifthly, in order to ensure that the wood plate for fixing the plant model is closely contacted with the bottom of the wind tunnel and prevent the wood plate for fixing the plant model from being lifted by strong wind, a strong double faced adhesive tape is needed to be used between the wood plate for fixing the plant model and the bottom of the wind tunnel; after the experiment, the wood plate for fixing the plant model is lifted out of the wind tunnel, and the residues of the double faced adhesive tape at the bottoms of the wood plate for fixing the plant model and the wind tunnel are cleaned. The second method comprises the following steps: firstly, according to research contents, calculating two-dimensional coordinates of the height and the space of a plant model on a board with a certain area; secondly, according to the designed space two-dimensional coordinate, punching holes on the wood board by using a puncher, wherein the diameter of each hole is equal to the diameter of a stem at the lower part of the plant model, and inserting the plant model into the holes; lifting the punched board into a wind tunnel; fourthly, strong double faced adhesive tape is needed to be used between the punched wood board and the bottom of the wind tunnel to ensure that the punched wood board is closely contacted with the bottom of the wind tunnel and prevent the punched wood board from being lifted by strong wind; fifthly, after the experiment is finished, the punched wood board needs to be lifted out of the wind tunnel, and the residues at the bottoms of the punched wood board and the wind tunnel are cleaned. The third method comprises the following steps: firstly, according to research contents, calculating a two-dimensional coordinate of the height and the space of a plant model on a foam board with a certain area; vertically inserting the plant model into the foam wood board according to the designed space two-dimensional coordinate; the subsequent steps are the same as those of the third step.

The prior methods have the following common disadvantages: the method is time-consuming (the procedure is complicated), labor-consuming (the wind tunnel space is small, the height of a common wind tunnel is 1.2m, the width of the common wind tunnel is 1.2m, the personnel can not easily enter and exit the wind tunnel), material-consuming (the wood board and the foam board can not be recycled for a long time) and difficult to clean up the residues of the double faced adhesive tape. Secondly, the second method has the following disadvantages: firstly, the needed punched wood board is thick, otherwise, the plant model can not keep the lower part stable under the action of wind; secondly, under the condition that the punching diameter of the wood board is not consistent with the diameter of the plant model stem, the lower part of the plant model shakes under the action of wind power, and the experimental result is obviously influenced. The third method also has the following disadvantages: because the plant model is inserted into the foam board, the lower part of the plant model can shake under the action of strong wind, and the experiment result is obviously influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a device for fixing a plant model in a wind tunnel, which is used for solving the problems in the prior art, is time-saving and labor-saving when the plant model is installed, can be used for multiple times, can keep the position of the plant model stable in a wind tunnel experiment, and cannot influence the experiment result.

In order to achieve the purpose, the utility model provides the following scheme: the utility model provides a device for fixing a plant model in a wind tunnel, which comprises:

the fixing assembly comprises two plant clamps and a straight cylinder, the plant clamps are positioned at the top of the straight cylinder, and the bottom end of the straight cylinder is fixedly connected with a magnetic block;

the lifting assembly comprises a first sliding rod and a second sliding rod, the first sliding rod and the second sliding rod are respectively and fixedly connected with a plurality of first connecting rods, a support is arranged between the first connecting rods, and the straight cylinder is positioned in the support;

the supporting component comprises two symmetrically arranged frames, a first sliding hole and a second sliding hole which are parallel to each other are arranged in the frames, a first sliding rod penetrates through the first sliding hole and is connected with the first sliding hole in a sliding mode, a second sliding rod penetrates through the second sliding hole and is connected with the second sliding hole in a sliding mode, a plurality of reinforcing rods are fixedly connected between the frames, and idler wheels are arranged at the bottom ends of the frames.

According to the technical scheme, the improved plant clamp comprises a support, and is characterized in that two stand columns are fixedly connected to the top end of the support, two stand column top ends are fixedly connected with fixing blocks respectively, a first through hole and a second through hole are formed in the fixing blocks, the first through hole corresponds to one of the stand columns, the second through hole corresponds to one of the stand columns, a polished rod and a threaded rod are arranged in the first through hole in a penetrating mode, the threaded rod is arranged in the second through hole in a penetrating mode, the threaded rod is connected with the second through hole in a sliding mode, a third through hole and a threaded hole are formed in the plant clamp, the two plant clamps are arranged in a mutually reverse threaded mode, the threaded rod is arranged in the threaded hole in a penetrating mode, the polished rod is arranged in the third through hole in a penetrating mode, and two ends of the threaded rod are fixedly connected with rotating blocks respectively.

According to a further optimization scheme, the support comprises a plurality of supporting rods, the supporting rods are sequentially fixedly connected end to end, the supporting rods are fixedly connected with the stand columns, and the supporting rods are fixedly connected with the first connecting rods.

According to the further optimization scheme, the plurality of supporting rods are fixedly connected with straight cylinder fixing rods respectively, the straight cylinder fixing rods are fixedly connected with the straight cylinders, the magnetic blocks and the straight cylinders are sleeved with sheaths, and the straight cylinder fixing rods penetrate through the sheaths.

According to the further optimization scheme, the frame comprises a plurality of reinforcing beams, the reinforcing beams are sequentially and fixedly connected end to end, a first sliding plate and a second sliding plate are fixedly connected to the reinforcing beams, the first sliding plate is provided with a first sliding hole, and the second sliding plate is provided with a second sliding hole.

According to the further optimization scheme, the bottom ends of the reinforcing beams are fixedly connected with a plurality of supporting legs respectively, and the supporting legs are rotatably connected with the rollers.

According to the further optimization scheme, a third sliding plate is fixedly connected to the bottom end of the reinforcing beam, a third sliding hole is formed in the third sliding plate, the third sliding hole is parallel to the first sliding hole and the second sliding hole, two ends of the first sliding rod are fixedly connected with suspension rods respectively, one end, far away from the first sliding rod, of each suspension rod is fixedly connected with a third sliding rod, the third sliding rod penetrates through the third sliding hole, the third sliding rod is rotatably connected with a stop block, the stop block is provided with an inclined plane end, and the inclined plane end can abut against the roller.

According to the further optimization scheme, a fourth through hole is formed in the stop block, the third slide bar penetrates through the fourth through hole and is in sliding connection with the stop block through the fourth through hole, and the two ends of the third slide bar are fixedly connected with the stop block.

The utility model discloses the following technical effects: the device is provided with a fixing component, the fixing component is used for fixing the plant model and comprises two plant clamps and a straight cylinder, the straight cylinder and the plant clamps are used for fixing the plant model, the plant model is inserted into the straight cylinder and is fixed by the plant clamps; the lifting assembly is used for lifting or descending the fixing assembly and comprises a first sliding rod and a second sliding rod, and the first sliding rod and the second sliding rod drive the fixing assembly to move through a first connecting rod and a support; the supporting component comprises a frame, a first sliding hole and a second sliding hole which are parallel to each other are arranged in the frame, a first sliding rod slides in the first sliding hole, a second sliding rod slides in the second sliding hole, the first sliding rod and the reinforcing rod are held by hands, a straight cylinder and a magnetic block can be driven to move towards the oblique upper side, the magnetic block is made to leave the wind tunnel floor, the first sliding rod and the reinforcing rod are loosened, under the action of gravity and the suction force of the magnetic block, the straight cylinder and the magnetic block move downwards, finally the magnetic block is attached to the wind tunnel floor, and the plant model is fixed. The device has simple structure and convenient use, can be repeatedly used for many times, and meets the requirement of a wind tunnel experiment on fixing a plant model.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural diagram of a fixed plant model device in a wind tunnel according to the present invention;

FIG. 2 is a front view of the present invention;

FIG. 3 is a top view of the present invention;

wherein, 1, the plant clip; 2. a straight cylinder; 3. a magnetic block; 4. a first slide bar; 5. a second slide bar; 6. a first link; 7. stopping the block; 8. a first slide hole; 9. a second slide hole; 10. a reinforcing bar; 11. a roller; 12. a column; 13. a fixed block; 14. a polish rod; 15. a threaded rod; 16. rotating the block; 17. a strut; 18. a straight cylinder fixing rod; 19. a reinforcing beam; 20. a support leg; 21. a third slide plate; 22. a third slide hole; 23. a suspension rod; 24. a third slide bar; 25. a blocking block; 26. a first slide plate; 27. a second slide plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Referring to fig. 1-2, the present invention provides a device for fixing a plant model in a wind tunnel, comprising:

the fixing assembly comprises two plant clamps 1 and a straight cylinder 2, the plant clamps 1 are positioned at the top of the straight cylinder 2, and the bottom end of the straight cylinder 2 is fixedly connected with a magnetic block 3; insert plant model in the straight section of thick bamboo 2 to fix with plant clamp 1, magnetic block 3 can adsorb on the floor of wind-tunnel, prevents that plant model from being blown away when carrying out the wind-tunnel experiment.

The lifting assembly comprises a first sliding rod 4 and a second sliding rod 5, the first sliding rod 4 and the second sliding rod 5 are respectively and fixedly connected with a plurality of first connecting rods 6, a support is arranged between the first connecting rods 6, and the straight cylinder 2 is positioned in the support; the first slide bar 4 and the second slide bar 5 drive the bracket to move through the first connecting rod 6, so as to drive the straight cylinder 2 in the bracket to move.

The supporting assembly comprises two symmetrically arranged frames, a first sliding hole 8 and a second sliding hole 9 which are parallel to each other are arranged in the frames, a first sliding rod 4 penetrates through the first sliding hole 8 and is in sliding connection with the first sliding hole 8, a second sliding rod 5 penetrates through the second sliding hole 9 and is in sliding connection with the second sliding hole 9, a plurality of reinforcing rods 10 are fixedly connected between the two frames, and rollers 11 are arranged at the bottom ends of the frames; the two frames are connected by a reinforcing bar 10, the first slide bar 4 being slidable in a first slide hole 8 and the second slide bar 5 being slidable in a second slide hole 9.

In the embodiment, when the device is used, a plant model is inserted into the straight cylinder 2, then the plant model is fixed by the plant clamp 1, the first sliding rod 4 and the reinforcing rod 10 are held by one hand, the highest point of the first sliding rod 4 in the first sliding hole 8 is pushed into the wind tunnel through the roller 11, the first sliding rod 4 and the reinforcing rod 10 are loosened, the straight cylinder 2 moves towards the oblique lower side under the action of gravity and the suction force of the magnetic block 3 to drive the support to move towards the oblique lower side, and the support drives the first sliding rod 4 and the second sliding rod 5 to move in the first sliding hole 8 and the second sliding hole 9 through the first connecting rod 6, so that the magnetic block 3 is adsorbed on the floor of the wind tunnel, and the plant model is fixed. After the experiment is finished, the first sliding rod 4 and the reinforcing rod 10 are held by one hand, the first sliding rod 4 is pulled obliquely upwards, the first sliding rod 4 slides in the first sliding hole 8, the first sliding rod 4 drives the first connecting rod 6 to move, the first connecting rod 6 pulls the support to move, and the first sliding hole 8 and the second sliding hole 9 are parallel to each other, so that the support drives the first connecting rod 6, the second sliding rod 5 is driven to move in the second sliding hole 9, the support drives the straight cylinder 2 to move obliquely upwards, the magnetic block 3 is lifted and separated from the floor of the wind tunnel, and the device can be conveniently taken out of the wind tunnel.

According to the further optimization scheme, the top ends of the support are fixedly connected with two upright posts 12, the top ends of the two upright posts 12 are respectively and fixedly connected with a fixed block 13, the fixed block 13 is provided with a first through hole and a second through hole, the two first through holes are correspondingly arranged, the two second through holes are correspondingly arranged, a polished rod 14 penetrates through the two first through holes, threaded rods 15 penetrate through the two second through holes, the threaded rods 15 are slidably connected with the second through holes, the plant clamp 1 is provided with a third through hole and threaded holes, threads in the two threaded holes of the two plant clamps 1 are opposite to each other, the threaded rods 15 penetrate through the two threaded holes, the polished rods 14 penetrate through the two third through holes, and two ends of the threaded rods 15 are respectively and fixedly connected with a rotating block 16; when the plant model needs to be clamped, the plant model is inserted into the straight cylinder 2, the rotating block 16 is rotated, the threaded rod 15 is rotated, and the threads in the two threaded holes of the two plant clamps 1 are opposite to each other, so that the two plant clamps 1 can move towards the middle to clamp the plant model, and the polished rod 14 penetrates through the third threaded hole of the plant clamp 1 to play a role in auxiliary support for the plant clamp 1; when the plant model needs to be taken down, the rotating block 16 is rotated in the opposite direction, so that the plant clamp 1 moves in the opposite direction, and the plant clamp 1 can release the plant model.

According to a further optimized scheme, the support comprises a plurality of supporting rods 17, the supporting rods 17 are sequentially and fixedly connected end to end, the supporting rods 17 are fixedly connected with the upright post 12, and the supporting rods 17 are fixedly connected with the first connecting rod 6; the support rod 17 is fixedly connected end to enable the support to be firmer.

According to a further optimized scheme, a plurality of supporting rods 17 are fixedly connected with a straight cylinder fixing rod 18 respectively, the straight cylinder fixing rod 18 is fixedly connected with a straight cylinder 2, a sheath is sleeved outside the magnetic block 3 and the straight cylinder 2, and the straight cylinder fixing rod 18 penetrates through the sheath; the straight cylinder 2 is fixedly connected with the supporting rod 17 through the straight cylinder fixing rod 18, when the supporting rod 17 moves, the straight cylinder 2 can be driven to move through the straight cylinder fixing rod 18, the magnetic block 3 and the straight cylinder 2 are sleeved by the protective sleeve, and the floor of the wind tunnel can be protected from abrasion.

According to a further optimized scheme, the framework comprises a plurality of reinforcing beams 19, the plurality of reinforcing beams 19 are sequentially and fixedly connected end to end, the reinforcing beams 19 are fixedly connected with a first sliding plate 26 and a second sliding plate 27, the first sliding plate 26 is provided with a first sliding hole 8, and the second sliding plate 27 is provided with a second sliding hole 9; the frame is firmer, the first slide hole 8 is arranged on the first slide plate 26, and the second slide hole 9 is arranged on the second slide plate 27.

In a further optimized scheme, a plurality of support legs 20 are respectively fixedly connected to the bottom ends of the reinforcing beams 19, and the support legs 20 are rotatably connected with the rollers 11; the roller 11 is connected to the reinforcing beam 19 by means of legs 20, which facilitates the movement of the device.

According to a further optimized scheme, a third sliding plate 21 is fixedly connected to the bottom end of the reinforcing beam 19, a third sliding hole 22 is formed in the third sliding plate 21, the third sliding hole 22 is parallel to the first sliding hole 8 and the second sliding hole 9, two ends of the first sliding rod 4 are fixedly connected with a suspension rod 23 respectively, one end, far away from the first sliding rod 4, of the suspension rod 23 is fixedly connected with a third sliding rod 24, the third sliding rod 24 penetrates through the third sliding hole 22, the third sliding rod 24 is rotatably connected with a stop block 7, and the stop block 7 is provided with an inclined plane end; in this embodiment, the inclined end can abut against the roller 11, the first slide bar 4 is fixedly connected with the third slide bar 24 through the suspension rod 23, the third slide hole 22 is parallel to the first slide hole 8, when the first slide bar 4 moves, the third slide bar 24 also moves in the third slide hole 22, and the stop 7 moves at the same time, when a wind tunnel experiment needs to be performed, after the first slide bar 4 is loosened, the third slide bar 24 also slides down obliquely, the stop 7 also moves downward obliquely, and the angle of the stop 7 is adjusted, so that the inclined end of the stop 7 abuts against the roller 11, and the device can be prevented from moving during the experiment, which affects the experiment effect, when the experiment is finished, the first slide bar 4 is lifted, the third slide bar 24 is also lifted, because the stop 7 is rotatably connected with the third slide bar 24, and the stop 7 can conveniently separate from the roller 11.

According to a further optimized scheme, a fourth through hole is formed in the stop block 7, a third slide bar 24 penetrates through the fourth through hole, the third slide bar 24 is connected with the stop block 7 in a sliding mode through the fourth through hole, and two ends of the third slide bar 24 are fixedly connected with stop blocks 25; the stop 7 is prevented from disengaging the third slide 24 by the stop 25.

When the device is used, a plant model is inserted into a straight cylinder 2, a rotating block 16 is rotated, a threaded rod 15 drives two plant clamps 1 to move towards the middle, the plant model is clamped tightly, a first sliding rod 4 and a reinforcing rod 10 are held by one hand, the first sliding rod 4 is positioned at the highest point in a first sliding hole 8, a marker pen and a ruler are used for calibrating the space two-dimensional coordinate of the plant model set by an experimental scheme in a wind tunnel, the device is pushed to the well-set position in the wind tunnel through a roller 11, the first sliding rod 4 and the reinforcing rod 10 are loosened, the plant model, the straight cylinder 2 and a magnetic block 3 move downwards under the action of gravity and the suction force of the magnetic block 3, a supporting rod 17, a first connecting rod 6, a first sliding rod 4 and a second sliding rod 5 move obliquely downwards under the guiding action of the first sliding hole 8 and a second sliding hole 9, finally the magnetic block 3 is adsorbed on the floor of the wind tunnel, a sheath sleeves the magnetic block 3 and the straight cylinder 2, the wind tunnel floor is protected from being abraded, after the first sliding rod 4 is loosened, the third sliding rod 24 can also slide downwards obliquely, the stop block 7 can also move downwards obliquely, the angle of the stop block 7 is adjusted, the inclined end of the stop block 7 is abutted to the roller 11, and the device can be prevented from moving during an experiment. After the experiment, hold first slide bar 4 and stiffener 10 with one hand, mention first slide bar 4, upwards stimulate first slide bar 4 to the slant, make first slide bar 4 slide at first slide opening 8, first slide bar 4 drives first connecting rod 6 motion, finally drive straight section of thick bamboo 2 upwards to the slant move, make magnetic block 3 break away from the wind-tunnel floor, when first slide bar 4 is lifted, third slide bar 24 also can be mentioned, because stop 7 rotates with third slide bar 24 to be connected, stop 7 can be convenient break away from gyro wheel 11, with this device take out the wind-tunnel can, finally, clear away the position of preceding mark in the wind-tunnel with the rag that dips in the alcohol. The device can control the whole size to be 30-40cm during actual manufacturing, and operators can operate the device to put in or take out the wind tunnel by one hand.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.

Claims

1. A device for fixing a plant model in a wind tunnel is characterized by comprising:

the fixing assembly comprises two plant clamps (1) and a straight cylinder (2), the plant clamps (1) are positioned at the top of the straight cylinder (2), and the bottom end of the straight cylinder (2) is fixedly connected with a magnetic block (3);

the lifting assembly comprises a first sliding rod (4) and a second sliding rod (5), the first sliding rod (4) and the second sliding rod (5) are respectively and fixedly connected with a plurality of first connecting rods (6), a support is arranged between the first connecting rods (6), and the straight cylinder (2) is positioned in the support;

the supporting component, the supporting component includes the frame that two symmetries set up, be equipped with first slide opening (8) and second slide opening (9) that are parallel to each other in the frame, first slide bar (4) wear to establish in first slide opening (8) and with first slide opening (8) sliding connection, second slide bar (5) wear to establish in second slide opening (9) and with second slide opening (9) sliding connection, two a plurality of stiffeners (10) of fixedly connected with between the frame, the frame bottom is equipped with gyro wheel (11).

2. The device for fixing plant models in wind tunnels according to claim 1, characterized in that: the top ends of the brackets are fixedly connected with two upright posts (12), the top ends of the two upright posts (12) are respectively and fixedly connected with a fixed block (13), a first through hole and a second through hole are arranged on the fixing block (13), the two first through holes are correspondingly arranged, the two second through holes are correspondingly arranged, a polished rod (14) penetrates through the two first through holes, a threaded rod (15) penetrates through the two second through holes, the threaded rod (15) is connected with the second through hole in a sliding way, a third through hole and a threaded hole are formed in the plant clamp (1), threads in the two threaded holes of the two plant clamps (1) are opposite to each other, the threaded rod (15) penetrates through the two threaded holes, the polished rod (14) penetrates through the two third through holes, and the two ends of the threaded rod (15) are fixedly connected with rotating blocks (16) respectively.

3. The device for fixing plant models in wind tunnels according to claim 2, characterized in that: the support includes a plurality of branch (17), and is a plurality of head and the tail fixed connection in proper order between branch (17), branch (17) with stand (12) fixed connection, branch (17) with first connecting rod (6) fixed connection.

4. The device for fixing plant models in wind tunnels according to claim 3, wherein: the supporting rods (17) are fixedly connected with straight cylinder fixing rods (18) respectively, the straight cylinder fixing rods (18) are fixedly connected with the straight cylinders (2), the magnetic block (3) and the straight cylinders (2) are sleeved with sheaths, and the straight cylinder fixing rods (18) are arranged in the sheaths in a penetrating mode.

5. The device for fixing plant models in wind tunnels according to claim 1, characterized in that: the frame comprises a plurality of reinforcing beams (19), the reinforcing beams (19) are sequentially fixedly connected end to end, a first sliding plate (26) and a second sliding plate (27) are fixedly connected to the reinforcing beams (19), the first sliding plate (26) is provided with a first sliding hole (8), and the second sliding plate (27) is provided with a second sliding hole (9).

6. The device for fixing plant models in wind tunnels according to claim 5, wherein: the bottom end of the reinforcing beam (19) is fixedly connected with a plurality of supporting legs (20), and the supporting legs (20) are rotatably connected with the rollers (11).

7. The device for fixing plant models in wind tunnels according to claim 6, wherein: the bottom end of the reinforcing beam (19) is fixedly connected with a third sliding plate (21), the third sliding plate (21) is provided with a third sliding hole (22), the third sliding hole (22) is parallel to the first sliding hole (8) and the second sliding hole (9), two ends of the first sliding rod (4) are fixedly connected with suspension rods (23) respectively, one end, far away from the first sliding rod (4), of each suspension rod (23) is fixedly connected with a third sliding rod (24), the third sliding rod (24) penetrates through the third sliding hole (22), the third sliding rod (24) is rotatably connected with a stop block (7), and the stop block (7) is provided with an inclined plane end.

8. The device for fixing plant models in wind tunnels according to claim 7, wherein: the stop block (7) is provided with a fourth through hole, the third sliding rod (24) penetrates through the fourth through hole, the third sliding rod (24) is connected with the stop block (7) in a sliding mode through the fourth through hole, and the two ends of the third sliding rod (24) are fixedly connected with stop blocks (25).