Simulated rainfall equipment

Abstract

The invention provides rainfall simulation equipment which comprises a driving assembly, a push-pull assembly, a support and a plurality of injectors, the driving assembly is connected with the push-pull assembly, each injector comprises a piston rod and a needle cylinder arranged on the piston rod in a sleeving mode, each piston rod is connected to the push-pull assembly, and each needle cylinder is connected to the support. According to the invention, the piston rod of each injector is connected to the push-and-pull assembly, and the needle cylinder of each injector is connected to the bracket, so that the driving assembly can drive each piston rod to move along each needle cylinder simultaneously through the push-and-pull assembly, the water yield of each injector in unit time is the same, and the experiment requirement is met. For example, in order to observe the growth conditions of different plants under the same rainfall, different potted plants can be placed below the injectors, and the growth conditions of the potted plants can be observed after rainfall of the rainfall simulation equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of simulated rainfall experiments, and in particular relates to a simulated rainfall device. Background Art

[0002] In the fields of environmental science, agricultural research and ecological protection, simulating rainfall is an important means to study plant growth, soil erosion, water resource management and other aspects. The main working principle of the existing rainfall simulation equipment is to use a water pump to pump water from the water tank to the sprinkler, and then the water falls from the various outlets of the sprinkler to form rainfall. Due to the different water pressures at the locations of the outlets, the existing rainfall simulation equipment has an obvious defect, that is, the water output per unit time at each outlet is different, which cannot meet the experimental requirements. Summary of the invention

[0003] Therefore, the present invention provides a rainfall simulation device, which can solve the technical problem that the water output per unit time of each water outlet of the existing rainfall simulation device is different and cannot meet the experimental requirements.

[0004] In order to solve the above problems, the present invention provides a simulated rainfall device, including a driving assembly, a push-pull assembly, a bracket and a plurality of syringes, the driving assembly is connected to the push-pull assembly, each of the syringes includes a piston rod and a syringe sleeved on the piston rod, each of the piston rods is connected to the push-pull assembly, and each of the syringes is connected to the bracket.

[0005] In some embodiments, each of the piston rods can be detachably connected to the push-pull assembly, and each of the syringes can be detachably connected to the bracket.

[0006] In some embodiments, each syringe has a tube edge at the end away from the liquid outlet, the bracket includes a fixing assembly, the fixing assembly includes a first fixing plate, the first fixing plate is configured with a plurality of first notches distributed at intervals, each syringe is respectively clamped in each first notch, and each tube edge is hooked on the first fixing plate.

[0007] In some embodiments, the fixing assembly further includes a crossbeam and a plurality of clamping fittings, wherein the crossbeam is fixed on the first fixing plate and is located below the first fixing plate, the width of the crossbeam is smaller than the width of the first fixing plate, each of the clamping fittings is located on the outside of the crossbeam, and each of the clamping fittings has a clamping state and a release state. When each of the clamping fittings is in the clamping state, each of the clamping fittings respectively cooperates with the crossbeam to clamp each of the syringes, and when each of the clamping fittings is in the release state, each of the clamping fittings releases the clamping of each of the syringes.

[0008] In some embodiments, a plurality of spaced-apart connecting members are provided on the crossbeam, each of the connecting members is provided with an elastic member, each of the clamping fittings is slidably connected to each of the connecting members, the elastic member is clamped between the clamping fitting and one end of the connecting member away from the crossbeam, and the elastic member cooperates with an external force to switch the clamping fitting between the clamping state and the released state.

[0009] In some embodiments, each of the clamping fittings can rotate relative to each of the connecting members. When each of the clamping fittings is in the clamping state, each of the clamping fittings is located below the first fixed plate. When each of the clamping fittings is in a released state, each of the clamping fittings rotates to abut against the first fixed plate.

[0010] In some embodiments, the bracket further includes a supporting component, wherein the supporting component is connected to the fixing component and supports the fixing component, and the supporting component is capable of adjusting the height of the fixing component.

[0011] In some embodiments, the support assembly includes a support column, a screw rod and a nut, wherein the support column is configured with a socket extending along its height direction, one end of the screw rod is inserted into the socket, and the other end of the screw rod is connected to the fixing assembly, the nut is threadedly connected to the screw rod, and the nut is located between the support column and the fixing assembly.

[0012] In some embodiments, the driving assembly includes a motor and a screw, the output shaft of the motor is connected to the screw, the screw passes through the push-pull assembly, and the screw is threadedly connected to the push-pull assembly. When the motor drives the screw to rotate, the push-pull assembly can move along the screw.

[0013] In some embodiments, the push-pull assembly includes a first push-pull plate and a second push-pull plate fixed on the first push-pull plate, the second push-pull plate is located below the first push-pull plate, and a gap is formed between the second push-pull plate and the first push-pull plate, and the second push-pull plate is configured with a plurality of second notches distributed at intervals, each of the second notches is connected to the gap, each of the piston rods is respectively clamped in each of the second notches, and the pressing end of each of the piston rods is in the gap and hooked on the second push-pull plate.

[0014] The rainfall simulation device provided by the present invention has the following beneficial effects:

[0015] Since the piston rods of the syringes of the present application are connected to the push-pull assembly, and the syringes of the syringes are connected to the bracket, the driving assembly can drive the piston rods to move along the syringes at the same time through the push-pull assembly, so that the water output of each syringe per unit time is the same, and accurate simulation of rainfall per unit area is achieved, thereby meeting the experimental requirements. This implementation requirement can be, for example, to observe the growth of different plants under the same rainfall. In this case, different potted plants can be placed under each syringe, and the growth of each potted plant can be observed after the rainfall simulated by the rainfall equipment. Furthermore, each syringe can individually inhale a mixed solution with different components, volumes or concentrations, thereby meeting the requirements of diversified batch experiments for repeatability, reliability and accuracy. This implementation requirement is suitable for exposure growth experiments and comparative studies under different rainfall conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0017] Figure 1 A schematic diagram of the structure of a rainfall simulation device according to an embodiment of the present invention;

[0018] Figure 2 An exploded schematic diagram of a rainfall simulation device according to an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of a connecting piece, an elastic piece and a clamping fitting of a rainfall simulation device according to an embodiment of the present invention;

[0020] Figure 4 Schematic diagram of a collection bottle of a rainfall simulation device according to an embodiment of the present invention.

[0021] The reference numerals are as follows:

[0022] 1. Driving assembly; 11. Motor; 12. Screw; 2. Push-pull assembly; 21. First push-pull plate; 22. Second push-pull plate; 3. Syringe; 31. Piston rod; 32. Syringe; 4. Fixing assembly; 41. First fixing plate; 42. Crossbeam; 43. Clamping fitting; 44. Connecting piece; 45. Elastic piece; 46. Second fixing plate; 5. Supporting assembly; 51. Supporting column; 52. Screw; 53. Nut; 6. Limiting beam; 7. Top plate; 8. Bottom plate; 9. Collecting bottle; 91. Bottle body; 92. Bottle stopper; 93. Splash-proof component; 10. Controller. DETAILED DESCRIPTION

[0023] 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, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0024] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0025] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0026] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0027] See also Figures 1 to 4As shown, according to an embodiment of the present invention, a rainfall simulation device is provided, including a driving component 1, a push-pull component 2, a bracket and a plurality of syringes 3, the driving component 1 is connected to the push-pull component 2, each syringe 3 includes a piston rod 31 and a syringe 32 mounted on the piston rod 31, each piston rod 31 is connected to the push-pull component 2, and each syringe 32 is connected to the bracket.

[0028] In this technical solution, since the piston rod 31 of each syringe 3 of the present application is connected to the push-pull assembly 2, and the syringe 32 of each syringe 3 is connected to the bracket, the driving assembly 1 can drive each piston rod 31 to move along each syringe 32 at the same time through the push-pull assembly 2, so that the water output of each syringe 3 per unit time is the same, and accurate simulation of rainfall per unit area is achieved, thereby meeting the experimental requirements. This implementation requirement can be, for example, to observe the growth of different plants under the same rainfall. In this way, different potted plants can be placed under each syringe 3, and the growth of each potted plant can be observed after the rainfall simulated by the rainfall device. Furthermore, the rainfall simulated by each syringe 3 is uniform and consistent, which can also improve the reliability and repeatability of the experiment.

[0029] It should be noted that, since the water spilled from each water outlet comes from the same water tank, the existing rainfall simulation equipment has another obvious defect, that is, the water droplets spilled from each water outlet contain the same components, concentrations or contents of other mixtures, and it is impossible to achieve that water droplets of different components are spilled from water outlets in different areas, thereby failing to simulate the actual situation of different rainwater components in rainfall in different areas of the entire rainfall area. However, each syringe 3 of the present application can individually inhale a mixed liquid mixed with different components, concentrations or volumes, so the rainfall simulation equipment of the present application can achieve that syringes 3 at different positions in the rainfall area where all syringes 3 are located drip out water droplets of different components, thereby also being able to simulate the actual rainfall situation. It should be noted that the mixed liquid is water mixed with trace pollutants, such as heavy metals, organic micropollutants, etc.

[0030] As a specific implementation, each piston rod 31 can be detachably connected to the push-pull assembly 2, and each syringe 32 can be detachably connected to the bracket, so that each syringe 3 can be detached from the simulated rainfall device. After calculating in advance the amount of solution that each syringe 3 needs to absorb for simulating rainfall, a quantitative solution is configured, and then each syringe 3 is manually operated to absorb the required amount of solution, so that the configured quantitative solution can be absorbed cleanly without waste. Of course, when the driving assembly 1 pulls back each piston rod 31 through the push-pull assembly 2, each syringe 3 can also absorb the solution, but this method is not as flexible as the manual method, and it is difficult to absorb the configured solution cleanly. Therefore, the present application is more inclined to manually operate each syringe 3 to absorb the solution. Further, each syringe 3 can be detached from the simulated rainfall device, which also allows the simulated rainfall device of the present application to be replaced with syringes 3 of different models, so that different rainfall amounts and rainfall durations can be simulated.

[0031] See also Figure 1 and Figure 2 As shown, each syringe 32 has a tube edge at the end away from the liquid outlet, the bracket includes a fixing component 4, the fixing component 4 includes a first fixing plate 41, and the first fixing plate 41 is configured with a plurality of first notches distributed at intervals. Each syringe 32 is respectively clamped in each first notch, and each tube edge is hooked on the first fixing plate 41.

[0032] In this embodiment, by constructing a plurality of first notches distributed at intervals on the first fixing plate 41, each syringe 32 is respectively clamped in each first notch, and the barrel edge of each syringe 32 is hooked on the first fixing plate 41. Not only can the syringe 32 of each syringe 3 be detachably assembled on the first fixing plate 41, but it is also more convenient to disassemble and assemble the syringe 32 of each syringe 3 relative to the first fixing plate 41.

[0033] See also Figure 1 and Figure 2 As shown, the fixing assembly 4 also includes a crossbeam 42 and a plurality of clamping fittings 43. The crossbeam 42 is fixed on the first fixing plate 41 and is located below the first fixing plate 41. The width of the crossbeam 42 is smaller than the width of the first fixing plate 41. Each clamping fitting 43 is located on the outside of the crossbeam 42. Each clamping fitting 43 has a clamping state and a release state. When each clamping fitting 43 is in the clamping state, each clamping fitting 43 cooperates with the crossbeam 42 to clamp each syringe 32. When each clamping fitting 43 is in the release state, each clamping fitting 43 releases the clamping of each syringe 32.

[0034] In this technical solution, the crossbeam 42 and the plurality of clamping fittings 43 are provided to clamp the syringe 32 of each syringe 3, so that the fixing of the syringe 32 of each syringe 3 is more stable. In the process of the simulated rainfall device working, the syringe 32 of each syringe 3 will not easily shake or change position, thereby ensuring the accuracy and reliability of the experiment. At the same time, each clamping fitting 43 also has a release state for releasing the clamping of each syringe 32, so the provision of each clamping fitting 43 will not affect the disassembly and assembly of the syringe 32 of each syringe 3 relative to the first fixing plate 41.

[0035] See also Figures 1 to 3 As shown, a plurality of spaced-apart connecting members 44 are provided on the cross beam 42, and an elastic member 45 is provided on each connecting member 44. Each clamping fitting 43 is slidably connected to each connecting member 44, and the elastic member 45 is clamped between the clamping fitting 43 and one end of the connecting member 44 away from the cross beam 42. The elastic member 45 cooperates with an external force to switch the clamping fitting 43 between a clamped state and a released state.

[0036] In this embodiment, since the elastic member 45 is clamped between the clamping fitting 43 and the end of the connecting member 44 away from the cross beam 42, the elastic member 45 will apply a reverse force to the clamping fitting 43, so that the clamping fitting 43 and the cross beam 42 clamp the syringe 32 of the syringe 3 from both sides, and the clamping fitting 43 is in a clamping state. When the clamping fitting 43 is manually pulled to slide relative to the connecting member 44, the clamping fitting 43 can be moved away from the syringe 32 of the syringe 3, and the clamping fitting 43 is switched to a released state. That is, the present application can realize the switching of the clamping fitting 43 between the clamping state and the released state by adding a simple structure such as a connecting member 44 and an elastic member 45, and using the elastic member 45 and external force to cooperate.

[0037] See also Figure 1 and Figure 3 As shown, each clamping fitting 43 can rotate relative to each connecting member 44. When each clamping fitting 43 is in a clamping state, each clamping fitting 43 is located below the first fixed plate 41. When each clamping fitting 43 is in a released state, each clamping fitting 43 rotates to abut against the first fixed plate 41.

[0038] In this technical solution, since the width of the cross beam 42 is smaller than the width of the first fixing plate 41 and the cross beam 42 is located below the first fixing plate 41, when the clamping fitting 43 is in the clamping state, the clamping fitting 43 is also located below the first fixing plate 41. Therefore, when the syringe 3 is removed from the simulated rainfall device, under the action of the elastic member 45, the clamping fitting 43 will move along the connecting member 44 and enter the space formed by the bottom surface of the first fixing plate 41 and the side surface of the cross beam 42. In the process of installing the syringe 3 on the simulated rainfall device, the clamping fitting 43 needs to be taken out from the space formed by the bottom surface of the first fixing plate 41 and the side surface of the cross beam 42, which is very inconvenient. However, when the clamping fitting 43 can still rotate relative to the connecting member 44, if the syringe 3 needs to be removed from the simulated rainfall device, the clamping fitting 43 can be rotated to abut against the first fixed plate 41, so that the clamping fitting 43 is also switched to the released state, and after the syringe 3 is removed, since the clamping fitting 43 abuts against the first fixed plate 41, the clamping fitting 43 will not enter the space formed by the bottom surface of the first fixed plate 41 and the side of the crossbeam 42, so that no inconvenience will be caused in the subsequent installation of the syringe 3. Among them, the clamping fitting 43 can be a stopper, the connecting member 44 can be a bolt, and the elastic member 45 can be a spring. The stopper is configured with a through hole, the diameter of the through hole is larger than the diameter of the rod of the bolt, the rod of the bolt passes through the through hole of the stopper, the stopper can slide along the bolt and can also rotate relative to the bolt, the spring is sleeved on the rod of the bolt and is clamped between the end of the stopper and the bolt.

[0039] It should be noted that the fixing assembly 4 also includes a second fixing plate 46, which is fixed on the cross beam 42 and is located below the cross beam 42. A plurality of third notches are configured on the second fixing plate 46, each third notch corresponds to the position of each first notch, and the syringe 32 of each syringe 3 is also respectively clamped in each third notch, so as to fix the syringe 32 of each syringe 3 more stably. Among them, the first fixing plate 41, the cross beam 42 and the second fixing plate 46 are fixed together by screws, and each first notch is distributed on the front and rear sides of the first fixing plate 41, and each third notch is distributed on the front and rear sides of the second fixing plate 46.

[0040] As a specific implementation, the bracket further includes a support component 5 , which is connected to the fixing component 4 and supports the fixing component 4 . The support component 5 can adjust the height of the fixing component 4 .

[0041] In this embodiment, the support component 5 can adjust the height of the fixed component 4, which is equivalent to the height of each syringe 3 being adjustable, so that the simulated rainfall equipment of the present application can adjust the dripping position and dripping height of each syringe 3 according to experimental requirements.

[0042] See also Figure 1 and Figure 2 As shown, the support assembly 5 includes a support column 51, a screw rod 52 and a nut 53. The support column 51 is constructed with a socket extending along its height direction. One end of the screw rod 52 is inserted into the socket, and the other end of the screw rod 52 is connected to the fixing assembly 4. The nut 53 is threadedly connected to the screw rod 52, and the nut 53 is located between the support column 51 and the fixing assembly 4.

[0043] In this technical solution, by screwing the nut 53, adjusting the length of the screw rod 52 inserted into the insertion hole, and then making the nut 53 sit on the top of the support column 51, the height of the support assembly 5 is adjusted, and then the dripping height of each syringe 3 is adjusted. It can be understood that the distance that the nut 53 moves along the screw rod 52 can actually represent the length of the screw rod 52 inserted into or out of the insertion hole. The method of threading the nut 53 on the screw rod 52 can be used to perform refined height adjustment, so that the dripping height adjustment of each syringe 3 is more accurate.

[0044] It should be noted that a base plate 8 is also provided below the support assembly 5, the support column 51 is fixed on the base plate 8, and the top of the screw 52 is connected to the second fixed plate 46. A total of four groups of support assemblies 5 are provided, and two groups of support assemblies 5 are respectively distributed on the left and right sides of the fixed assembly 4 to maintain the support stability of the fixed assembly 4. A plurality of collecting bottles 9 are placed on the base plate 8, and the number of collecting bottles 9 is the same as the number of syringes 3, and the position distribution of each collecting bottle 9 corresponds to the position of each syringe 3, and the water droplets dripped from each syringe 3 enter each collecting bottle 9 respectively. Plants can be planted in each collecting bottle 9, and the growth of plants can also be recorded during the process of simulating rainfall. The collecting bottle 9 includes a bottle body 91, a bottle stopper 92 and a splash-proof component 93. The splash-proof component 93 can be a tube with a small diameter and open ends. The tube passes through the bottle stopper 92, and the water droplets dripped from the syringe 3 enter the bottle body 91 through the tube. Since the diameter of the tube is very small, it is difficult for the water dripping into the bottle body 91 to splash out from the tube, thereby achieving a splash-proof effect. Among them, each syringe 3 can be divided into two rows, each row has twelve, and each collecting bottle 9 can also be divided into two rows, each row has twelve. Further, the number of syringes 3 and collecting bottles 9 can also be adjusted according to experimental requirements, such as increasing the number of syringes 3 to four rows, a total of forty-eight, and increasing the number of collecting bottles 9 to four rows, a total of forty-eight.

[0045] See also Figure 1 and Figure 2 As shown, the driving assembly 1 includes a motor 11 and a screw 12. The output shaft of the motor 11 is connected to the screw 12. The screw 12 passes through the push-pull assembly 2, and the screw 12 is threadedly connected to the push-pull assembly 2. When the motor 11 drives the screw 12 to rotate, the push-pull assembly 2 can move along the screw 12.

[0046] In this embodiment, when the motor 11 is started and rotated forward, the motor 11 will drive the lead screw 12 to rotate forward synchronously, and the push-pull assembly 2 will move downward along the lead screw 12, so that the push-pull assembly 2 simultaneously pushes each piston rod 31 to move along each syringe 32, and each syringe 3 drips water to simulate rainfall. When the motor 11 is started and reversed, the motor 11 will drive the lead screw 12 to reverse synchronously, and the push-pull assembly 2 will move upward along the lead screw 12, so that the push-pull assembly 2 simultaneously pulls back each piston rod 31, and each syringe 3 simultaneously resets or simultaneously absorbs the solution configured for each. Preferably, the motor 11 is a stepping motor, and the stepping accuracy of the stepping motor can reach 0.01 mm, which can ensure high accuracy of rainfall simulation. Among them, the volume of syringe 3 can be 5mL, and the dripping rate can be controlled to 0.01mL / min, meeting the needs of high-precision experiments; the volume of syringe 3 can also be 10mL, and the dripping rate can also be controlled from 0.01mL / min to 5mL / min, thereby meeting the experimental needs of simulating various rainfall amounts such as light rain, moderate rain, and heavy rain.

[0047] Furthermore, in order to realize that the push-pull assembly 2 does not rotate synchronously with the lead screw 12 but moves up and down along the lead screw 12 during the rotation of the lead screw 12, a limit beam 6 can be provided on the outside of the push-pull assembly 2, so that one side of the push-pull assembly 2 is in contact with the limit beam 6. Due to the limitation of the limit beam 6, the push-pull assembly 2 does not rotate synchronously with the lead screw 12, but can only move up and down along the lead screw 12. Furthermore, a slide groove can also be constructed on the limit beam 6, so that one side of the push-pull assembly 2 extends into the slide groove, so that the push-pull assembly 2 moves up and down along the lead screw 12 more smoothly under the limitation and guidance of the slide groove.

[0048] See also Figure 1 and Figure 2 As shown, the push-pull assembly 2 includes a first push-pull plate 21 and a second push-pull plate 22 fixed on the first push-pull plate 21, the second push-pull plate 22 is located below the first push-pull plate 21, and a gap is formed between the second push-pull plate 22 and the first push-pull plate 21, and a plurality of second notches distributed at intervals are constructed on the second push-pull plate 22, each second notch is connected to the gap, each piston rod 31 is respectively clamped in each second notch, and the pressing end of each piston rod 31 is in the gap and hooked on the second push-pull plate 22.

[0049] In this technical solution, the first push-pull plate 21 and the second push-pull plate 22 can be fixed together by using multiple screws, and multiple gaskets can be placed between the first push-pull plate 21 and the second push-pull plate 22 so that a gap is formed when the first push-pull plate 21 and the second push-pull plate 22 are fixed together. Since each piston rod 31 is respectively stuck in each second notch and the pressing end of each piston rod 31 is in the gap and hooked on the second push-pull plate 22, if the first push-pull plate 21 and the second push-pull plate 22 move downward together, the first push-pull plate 21 will press against the pressing end of each piston rod 31 and move downward, and each syringe 3 drips water to achieve simulated rainfall; if the first push-pull plate 21 and the second push-pull plate 22 move upward together, since the pressing end of each piston rod 31 is hooked on the second push-pull plate 22, the second push-pull plate 22 will pull each piston rod 31 to move upward, thereby achieving the reset of each syringe 3. By fixing the first push-pull plate 21 and the second push-pull plate 22 together with a gap formed therebetween, and constructing a plurality of second notches connected to the gap on the second push-pull plate 22, it is possible to achieve the push-pull assembly 2 to carry the piston rods 31 up and down while ensuring that the piston rods 31 are detachably connected to the push-pull assembly 2. It can be understood that the first push-pull plate 21 and the second push-pull plate 22 are both located above the fixed assembly 4, and the second notches are distributed on the front and rear sides of the second push-pull plate 22.

[0050] The number of the limiting beams 6 can be four, and two limiting beams 6 are fixedly arranged on the left and right sides of the first fixed plate 41, and the first push-pull plate 21 and the second push-pull plate 22 are clamped between the limiting beams 6 on the left and right sides, and the first push-pull plate 21 and the second push-pull plate 22 can slide along the limiting beams 6 on the left and right sides. The first push-pull plate 21 and the second push-pull plate 22 can be respectively constructed with threaded holes, and the first push-pull plate 21 and the second push-pull plate 22 are respectively threadedly connected to the lead screw 12, and the end of the lead screw 12 away from the stepping motor can be rotatably connected to the first fixed plate 41, and when the stepping motor drives the lead screw 12 to rotate, the first push-pull plate 21 and the second push-pull plate 22 can be moved up and down along the lead screw 12. A sleeve can also be provided through the first push-pull plate 21 and the second push-pull plate 22, and an internal thread is provided in the sleeve, and the sleeve is threadedly connected to the lead screw 12, so that the first push-pull plate 21 and the second push-pull plate 22 can also be moved up and down along the lead screw 12. In order to ensure the stability of the first push-pull plate 21 and the second push-pull plate 22 moving up and down along the lead screw 12, guide rods can also be set on both sides of the lead screw 12, and the bottoms of the two guide rods penetrate the first push-pull plate 21 and the second push-pull plate 22 respectively and are fixed on the first fixed plate 41. A top plate 7 is fixed on the top of the limiting beam 6, and the top plate 7 is located above the first push-pull plate 21 and the second push-pull plate 22. The stepper motor is fixed on the top plate 7. The lead screw 12 penetrates the top plate 7 and is connected to the output shaft of the stepper motor. The tops of the two guide rods are fixed on the top plate 7. A controller 10 is also fixed on the top plate 7. The controller 10 is connected to the stepper motor through a cable. The controller 10 sets the required rainfall intensity and time. The controller 10 calculates the required advancement speed of the stepper motor according to the set parameters, thereby controlling the dripping frequency of each syringe 3.

[0051] It should also be noted that the drive assembly 1 can also be a cylinder or a hydraulic cylinder, and the telescopic end of the cylinder or the hydraulic cylinder is connected to the first push-pull plate 21. When the cylinder or the hydraulic cylinder is telescopic, the first push-pull plate 21 and the second push-pull plate 22 can also be moved up and down. Each syringe 3, each collection bottle 9 and other parts in contact with water are made of glass (glass parts are strictly cleaned and disinfected) to avoid the use of plastic or metal materials to release trace pollutants and affect the purity and accuracy of the experimental results. The bracket is made of high-strength materials, such as aluminum or organic glass, to ensure the stability and durability of the bracket.

[0052] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A rainfall simulation device, characterized in that: The invention comprises a driving assembly (1), a push-pull assembly (2), a bracket and a plurality of syringes (3); the driving assembly (1) is connected to the push-pull assembly (2); each syringe (3) comprises a piston rod (31) and a syringe (32) sleeved on the piston rod (31); each piston rod (31) is connected to the push-pull assembly (2); and each syringe (32) is connected to the bracket.

2. The rainfall simulation device according to claim 1, characterized in that: Each piston rod (31) is detachably connected to the push-pull assembly (2), and each syringe (32) is detachably connected to the bracket.

3. The rainfall simulation device according to claim 2, characterized in that: Each of the syringes (32) has a tube edge at one end away from the liquid outlet, the bracket comprises a fixing assembly (4), the fixing assembly (4) comprises a first fixing plate (41), the first fixing plate (41) is provided with a plurality of first notches distributed at intervals, each of the syringes (32) is respectively clamped in each of the first notches, and each of the tube edges is hooked on the first fixing plate (41).

4. The rainfall simulation device according to claim 3, characterized in that: The fixing assembly (4) further comprises a crossbeam (42) and a plurality of clamping fittings (43); the crossbeam (42) is fixed on the first fixing plate (41) and is located below the first fixing plate (41); the width of the crossbeam (42) is smaller than the width of the first fixing plate (41); each of the clamping fittings (43) is located on the outer side of the crossbeam (42); each of the clamping fittings (43) has a clamping state and a releasing state; when each of the clamping fittings (43) is in the clamping state, each of the clamping fittings (43) respectively cooperates with the crossbeam (42) to clamp each of the syringes (32); when each of the clamping fittings (43) is in the releasing state, each of the clamping fittings (43) releases the clamping of each of the syringes (32).

5. The rainfall simulation device according to claim 4, characterized in that: The cross beam (42) is provided with a plurality of spaced-apart connecting members (44), each of the connecting members (44) is provided with an elastic member (45), each of the clamping fittings (43) is slidably connected to each of the connecting members (44), the elastic member (45) is clamped between the clamping fitting (43) and one end of the connecting member (44) away from the cross beam (42), and the elastic member (45) cooperates with an external force to switch the clamping fitting (43) between the clamping state and the released state.

6. The rainfall simulation device according to claim 5, characterized in that: Each of the clamping fittings (43) is capable of rotating relative to each of the connecting members (44). When each of the clamping fittings (43) is in the clamping state, each of the clamping fittings (43) is located below the first fixing plate (41). When each of the clamping fittings (43) is in a released state, each of the clamping fittings (43) rotates to abut against the first fixing plate (41).

7. The rainfall simulation device according to claim 3, characterized in that: The bracket further comprises a supporting component (5), wherein the supporting component (5) is connected to the fixing component (4) and supports the fixing component (4), and the supporting component (5) is capable of adjusting the height of the fixing component (4).

8. The rainfall simulation device according to claim 7, characterized in that: The support assembly (5) comprises a support column (51), a screw rod (52) and a nut (53); a socket extending in a height direction of the support column (51) is configured therein; one end of the screw rod (52) is inserted into the socket; the other end of the screw rod (52) is connected to the fixing assembly (4); the nut (53) is threadedly connected to the screw rod (52), and the nut (53) is located between the support column (51) and the fixing assembly (4).

9. The rainfall simulation device according to claim 1, characterized in that: The driving assembly (1) comprises a motor (11) and a lead screw (12); the output shaft of the motor (11) is connected to the lead screw (12); the lead screw (12) passes through the push-pull assembly (2); and the lead screw (12) is threadedly connected to the push-pull assembly (2); when the motor (11) drives the lead screw (12) to rotate, the push-pull assembly (2) can move along the lead screw (12).

10. The rainfall simulation device according to claim 1, characterized in that: The push-pull assembly (2) comprises a first push-pull plate (21) and a second push-pull plate (22) fixed on the first push-pull plate (21); the second push-pull plate (22) is located below the first push-pull plate (21), and a gap is formed between the second push-pull plate (22) and the first push-pull plate (21); a plurality of second notches arranged at intervals are constructed on the second push-pull plate (22); each of the second notches is connected to the gap; each of the piston rods (31) is respectively clamped in each of the second notches, and a pressing end of each of the piston rods (31) is located in the gap and hooked on the second push-pull plate (22).

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