Water droplet bouncing experiment system

Abstract

The present invention relates to the technical field of water droplet experiment devices. Disclosed is a water droplet bouncing experiment system. The water droplet bouncing experiment system comprises: a support, used for fixing a cable; and a liquid dripping unit, comprising a liquid storage tank arranged on the support, a balance tank arranged at the top of the liquid storage tank, and a water drip pipe arranged at the bottom of the liquid storage tank. The liquid storage tank is used for storing water. The water drip pipe is connected to the liquid storage tank and is used for dripping liquid onto the cable. A partition member is slidably mounted in the balance tank. By adjusting the movement of the partition member, the water drip pipe is controlled to achieve water backflow or to drip a certain amount of water at a constant pressing force. By controlling the partition member in the balance tank to be lowered, the distance between the partition member and a water surface remains constant in a liquid dripping process, so that equal volumes of water can be pressed out by a constant force, and the backflow of the water in the water drip pipe can be promoted under the action of pressure, thereby preventing freezing caused by retention.

Description

Water droplet bouncing experiment system TECHNICAL FIELD

[0001] The present application relates to the technical field of water droplet experiment device, in particular to a water droplet bouncing experiment system. BACKGROUND

[0002] Freezing rain is the most serious icing form of power transmission cable, and a short time of freezing rain can quickly form ice glaze on the surface of the conductor, which is continuously wrapped to form a large number of ice ridges, and finally leads to excessive weight of the icing, resulting in cable dancing and collapse of the line tower.

[0003] The room-temperature dynamics of water droplet bouncing on superhydrophobic surfaces has been widely studied, which mainly includes three stages: diffusion, contraction and rebound. Water droplets are easy to bounce on superhydrophobic surfaces because the trapped air layer in the superhydrophobic substrate structure reduces the contact area between the water droplet and the underlying substrate. The temperature of superhydrophobic conductors when exerting the anti-icing effect is often very low, and the low-temperature and high-humidity environment can easily cause the anti-icing effect of the superhydrophobic structure to fail, thereby causing the bouncing of the impact liquid droplets on the superhydrophobic surface to fail, which means that the superhydrophobic conductors fail to prevent icing in the case of freezing rain. Therefore, it is particularly important to study the bouncing behavior of water droplets on superhydrophobic surfaces under outdoor icing conditions, i.e. low temperature and high humidity.

[0004] In the study of the bouncing behavior of water droplets on superhydrophobic surfaces, a plurality of control experiments need to be performed, wherein the volume of water droplets dropped in each group needs to be kept consistent to reduce experimental errors. It is worth noting that the common method is to apply a squeezing force F to make the water in the bottle drop out, and when the bottle is full of water, the squeezing force F1 applied to make the water flow out of the water outlet, and when the bottle is almost empty of water, the squeezing force F2 applied to make the water flow out of the water outlet. The squeezing force F1 and the squeezing force F2 are not the same, that is, the squeezing force F is constantly changing as the volume of water in the bottle decreases, and this squeezing force F is difficult to control. Therefore, the traditional method of applying a variable squeezing force F to make the water drop out is difficult to control, which may result in different volumes of water dropping out and experimental errors.

[0005] Moreover, since it is necessary to simulate the low-temperature outdoor environment, if the water in the water droplet pipe is retained for a long time, it may cause the water to freeze in the water droplet pipe, affecting the experiment. SUMMARY

[0006] This section is intended to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification of the present application to avoid obscuring the purpose of this section, the abstract and the title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0007] In view of the above and / or problems existing in the prior art, the present application is proposed.

[0008] Therefore, the problem to be solved by the present application is how to control the dripping of a constant amount of water and how to place the water in the water dripping pipe to freeze.

[0009] To solve the above technical problems, the present application provides the following technical scheme: a water droplet bouncing experiment system, comprising a support for fixing a cable; a dripping unit comprising a liquid storage tank arranged on the support, a balance tank arranged on the top of the liquid storage tank, and a water dripping pipe arranged at the bottom of the liquid storage tank; the liquid storage tank is used for storing water, the water dripping pipe is connected to the liquid storage tank, and the water dripping pipe is used for dripping water to the cable; a partition is slidably arranged in the balance tank, and the partition is adjusted to control the water dripping pipe to return water or to drip a constant amount of water under constant extrusion pressure.

[0010] As a preferred scheme of the water droplet bouncing experiment system of the present application, wherein: the partition separates the interior of the balance tank into a connecting cavity and a mixing cavity, the connecting cavity is connected to the liquid storage tank through a first pipeline, and the mixing cavity is connected to the liquid storage tank through a second pipeline.

[0011] As a preferred scheme of the water droplet bouncing experiment system of the present application, wherein: the partition comprises a partition disc; a rotating column is rotatably arranged in the balance tank, an installation hole is arranged on the partition disc, the rotating column is inserted into the installation hole, a helical groove is arranged on the circumferential wall of the rotating column, a protrusion is arranged on the inner circumferential wall of the installation hole, the protrusion is adapted to move along the contour direction of the helical groove, and the protrusion is interference-fitted with the helical groove.

[0012] As a preferred scheme of the water droplet bouncing experiment system of the present application, wherein: a limiting disc is arranged at the bottom of the rotating column, a plurality of ratchet grooves are arranged at the bottom of the limiting disc, the plurality of ratchet grooves are uniformly arranged around the circumferential direction of the limiting disc, an annular ratchet block is elastically arranged at the top of the liquid storage tank, and the annular ratchet block is adapted to be clamped with the ratchet grooves.

[0013] As a preferred scheme of the water droplet bouncing experiment system of the present application, wherein: the partition further comprises a floating safety disc, the floating safety disc is arranged on the side of the partition disc away from the liquid storage tank, and the floating safety disc is elastically connected with the partition disc.

[0014] As a preferred scheme of the water drop bouncing experiment system, the water drop pipe comprises a cooling part and a liquid outlet part, the cooling part is in a screw shape, and the liquid outlet part is connected with the cooling part; the cooling part is connected with the liquid storage tank through a third pipeline, and the water in the liquid storage tank is sequentially dropped through the third pipeline, the cooling part and the liquid outlet part; the cooling part is used for cooling the water flowing into the cooling part.

[0015] As a preferred scheme of the water drop bouncing experiment system, the water drop pipe comprises a cooling part and a liquid outlet part, the cooling part is in a screw shape, and the liquid outlet part is connected with the cooling part; the cooling part is connected with the liquid storage tank through a third pipeline, and the water in the liquid storage tank is sequentially dropped through the third pipeline, the cooling part and the liquid outlet part; the cooling part is used for cooling the water flowing into the cooling part.

[0016] As a preferred scheme of the water drop bouncing experiment system, the water drop pipe comprises a cooling part and a liquid outlet part, the cooling part is in a screw shape, and the liquid outlet part is connected with the cooling part; the cooling part is connected with the liquid storage tank through a third pipeline, and the water in the liquid storage tank is sequentially dropped through the third pipeline, the cooling part and the liquid outlet part; the cooling part is used for cooling the water flowing into the cooling part.

[0017] As a preferred scheme of the water drop bouncing experiment system, the water drop pipe comprises a cooling part and a liquid outlet part, the cooling part is in a screw shape, and the liquid outlet part is connected with the cooling part; the cooling part is connected with the liquid storage tank through a third pipeline, and the water in the liquid storage tank is sequentially dropped through the third pipeline, the cooling part and the liquid outlet part; the cooling part is used for cooling the water flowing into the cooling part.

[0018] As a preferred scheme of the water drop bouncing experiment system, the water drop pipe comprises a cooling part and a liquid outlet part, the cooling part is in a screw shape, and the liquid outlet part is connected with the cooling part; the cooling part is connected with the liquid storage tank through a third pipeline, and the water in the liquid storage tank is sequentially dropped through the third pipeline, the cooling part and the liquid outlet part; the cooling part is used for cooling the water flowing into the cooling part.

[0019] The application has the advantages that the distance between the partition and the water surface is constant during the water dropping process, so that the same volume of water can be squeezed out by using a constant force, and the water in the water drop pipe can be returned by using the pressure effect, so that the water stagnation is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without any creative labor. Among them:

[0021] Fig. 1 is a use scenario diagram of a water droplet bouncing experiment system.

[0022] Fig. 2 is a structural diagram of a water droplet unit of the water droplet bouncing experiment system.

[0023] Fig. 3 is a sectional view of the water droplet unit of the water droplet bouncing experiment system.

[0024] Fig. 4 is a structural diagram of a partition of the water droplet bouncing experiment system.

[0025] Fig. 5 is a schematic diagram of the relationship between the components of the water droplet bouncing experiment system. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific details set forth herein, and the present application can be practiced in other manners apparent to those skilled in the art without departing from the spirit and scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0028] Secondly, the "one embodiment" or "embodiment" referred to herein can include specific features, structures or characteristics included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor does it mean an embodiment that is separate or selectively excluded from other embodiments.

[0029] Embodiment 1

[0030] Referring to Figs. 1-5, the first embodiment of the present application provides a water droplet bouncing experiment system, which includes a support 100 and a droplet unit 200; the support 100 is used to fix the cable and install the droplet unit 200, and the droplet unit 200 is used to drip liquid onto the surface of the cable.

[0031] It is worth noting that the experimental environment of the present water droplet bouncing experiment system is a simulated outdoor cold environment.

[0032] Specifically, the drip unit 200 comprises a liquid storage tank 201 arranged on the support 100, a balance tank 202 arranged on the top of the liquid storage tank 201, and a drip pipe 203 arranged on the bottom of the liquid storage tank 201; the liquid storage tank 201 is used for storing water, the drip pipe 203 is communicated with the liquid storage tank 201, and the water in the liquid storage tank 201 can flow into the drip pipe 203, the drip pipe 203 is used for dripping water to the cable; the balance tank 202 is also communicated with the liquid storage tank 201, a partition 204 is slidably arranged in the balance tank 202, the partition 204 can slide along the length direction of the balance tank 202, and the movement of the partition 204 is adjusted to control the backflow of the drip pipe 203, so as to avoid the water retention in the drip pipe 203 to cause freezing, or to drip a constant amount of water with a constant extrusion force, so as to ensure that the volume of water dripping under a group of experiments is the same, and the experimental error is reduced.

[0033] Preferably, the partition 204 divides the inner part of the balance tank 202 into a connecting cavity 202a and a mixing cavity 202b, the connecting cavity 202a is located below the mixing cavity 202b, the connecting cavity 202a is communicated with the liquid storage tank 201 through a first pipeline 205, and the mixing cavity 202b is communicated with the liquid storage tank 201 through a second pipeline 206. In use, the cavity space of the connecting cavity 202a is continuously reduced with the decrease of the water level in the liquid storage tank 201, while the cavity space of the mixing cavity 202b is continuously increased with the decrease of the water level in the liquid storage tank 201; and the connecting cavity 202a and the mixing cavity 202b cannot be connected to the liquid storage tank 201 at the same time.

[0034] Preferably, the partition 204 comprises a partition disc 204a, the material of the partition disc 204a is rubber; a rotating column 202c is rotatably arranged in the balance tank 202, the rotating column 202c is coaxially arranged with the balance tank 202, the partition disc 204a is provided with a mounting hole 204a-1, the rotating column 202c is inserted into the mounting hole 204a-1, the circumferential wall of the rotating column 202c is provided with a spiral groove 202c-1, the inner circumferential wall of the mounting hole 204a-1 is provided with a protrusion 204a-2, when the rotating column 202c rotates, the protrusion 204a-2 can move along the contour direction of the spiral groove 202c-1, and the protrusion 204a-2 is interference-fitted with the spiral groove 202c-1, so as to avoid air leakage at the spiral groove 202c-1.

[0035] Preferably, the bottom of the rotating column 202c is provided with a limiting disc 202d, the bottom of the limiting disc 202d is provided with a plurality of ratchet grooves 202d-1, the plurality of ratchet grooves 202d-1 are evenly arranged around the circumferential direction of the limiting disc 202d, the top of the liquid storage tank 201 is elastically mounted with an annular ratchet block 201a, the annular ratchet block 201a is suitable for being clamped with the ratchet grooves 202d-1. When the rotating column 202c rotates and the partition 204 moves downward, the limiting disc 202d can rotate, the annular ratchet block 201a is pressed and moves up and down, at this time, the annular ratchet block 201a does not hinder the rotation of the limiting disc 202d; but the annular ratchet block 201a will hinder the reverse rotation of the limiting disc 202d, that is, limit the upward movement of the partition 204.

[0036] Preferably, the liquid drop unit 200 further comprises an air pump 208, the air pump 208 is connected with the mixing cavity 202b through a fourth pipeline 209, the air pump 208 can intermittently inject a certain amount of gas into the mixing cavity 202b, and drive the partition disc 204a to move downward intermittently by a fixed distance; the fourth pipeline 209 is provided with a fourth electromagnetic valve 209a, the fourth electromagnetic valve 209a is used for controlling the opening and closing of the fourth pipeline 209; the air pump 208 is used for driving the partition disc 204a to move towards the liquid storage tank 201, that is, by intermittently injecting a certain amount of gas into the mixing cavity 202b, forcing the partition disc 204a to move downward, so that the distance between the partition disc 204a and the water liquid level in the liquid storage tank 201 is constant.

[0037] Preferably, the partition 204 further comprises a floating safety disc 204b, the floating safety disc 204b is arranged on the side of the partition disc 204a away from the liquid storage tank 201, and the floating safety disc 204b is elastically connected with the partition disc 204a. When the air pump 208 intermittently injects a certain amount of gas into the mixing cavity 202b, the pushing force of the gas needs to overcome the upward elastic force of the floating safety disc 204b to push the floating safety disc 204b and the partition disc 204a to move downward, which plays a safety role.

[0038] Preferably, the liquid storage tank 201 is provided with a heat preservation pipe for heat preservation of the water liquid in the liquid storage tank 201, so that the temperature of the water liquid in the liquid storage tank 201 is maintained at 0° or above, avoiding the water liquid from freezing in the liquid storage tank 201; the water dripping pipe 203 comprises a cooling portion 203a and a liquid outlet portion 203b, the cooling portion 203a is in a screw shape, so that the water liquid in the cooling portion 203a is easier to cool down, the liquid outlet portion 203b is in communication with the cooling portion 203a, the cooling portion 203a is in communication with the liquid storage tank 201 through a third pipeline 207, the third pipeline 207 is provided with a third electromagnetic valve 207a for controlling the opening and closing of the third pipeline 207; the water liquid in the liquid storage tank 201 drips out through the third pipeline 207, the cooling portion 203a and the liquid outlet portion 203b in sequence; the cooling portion 203a is used for cooling the water liquid flowing into the cooling portion 203a.

[0039] Preferably, the control module 400 is further provided with a control program, the control program comprises the following steps: controlling the first electromagnetic valve 205a, the second electromagnetic valve 206a, the third electromagnetic valve 207a and the fourth electromagnetic valve 209a to switch the water dripping pipe 203 to drip water or to drip water at a constant extrusion pressure.

[0040] It is worth mentioning that when the water liquid in the liquid storage tank 201 reaches the maximum height, the hydrostatic pressure of the bottom of the liquid storage tank 201 is also the maximum. This hydrostatic pressure decreases with the decrease of the water liquid in the liquid storage tank 201, and the extrusion pressure applied to the liquid storage tank 201 needs to increase to extrude the remaining water liquid. If the hydrostatic pressure is kept relatively constant, the water liquid can be extruded by a relatively constant extrusion pressure. The distance between the separation disc 204a and the water liquid surface in the liquid storage tank 201 remains relatively stable as the separation disc 204a descends with the water liquid surface in the liquid storage tank 201, forcing the pressure in the liquid storage tank 201 to remain stable, and also keeping the hydrostatic pressure stable.

[0041] Further, the first pipeline 205 is provided with a first electromagnetic valve 205a for controlling the opening and closing of the first pipeline 205, the second pipeline 206 is provided with a second electromagnetic valve 206a for controlling the opening and closing of the second pipeline 206; by switching the opening or closing of the first electromagnetic valve 205a, the second electromagnetic valve 206a, the third electromagnetic valve 207a and the fourth electromagnetic valve 209a, the water dripping pipe 203 is switched to drip water or to drip water at a constant extrusion pressure.

[0042] Further, the control module 400 is further provided with a control program, the control program comprises the following steps: controlling the first electromagnetic valve 205a, the second electromagnetic valve 206a, the third electromagnetic valve 207a and the fourth electromagnetic valve 209a to switch the water dripping pipe 203 to drip water or to drip water at a constant extrusion pressure.

[0043] In order to facilitate understanding of the technical scheme of the present application, the working process thereof is briefly described as follows:

[0044] Dripping stage:

[0045] Step one: the first electromagnetic valve 205a and the third electromagnetic valve 207a are turned on, and the second electromagnetic valve 206a and the fourth electromagnetic valve 209a are turned off; the air cylinder 301 drives the extrusion column 302 to extrude the liquid tank 201 at a constant extrusion pressure, and the water in the liquid tank 201 flows into the cooling part 203a and drips out from the liquid outlet 203b;

[0046] Step two: the first electromagnetic valve 205a is turned on, and the second electromagnetic valve 206a, the third electromagnetic valve 207a and the fourth electromagnetic valve 209a are turned off; the air pump 208 injects a certain amount of gas into the mixing chamber 202b, and the thrust of the gas overcomes the elastic force of the floating safety disc 204b to push the floating safety disc 204b and the separation disc 204a to move downward, so that the separation disc 204a keeps a relatively constant page with the water in the liquid tank 201;

[0047] Step three: repeat the first step to drip water;

[0048] Water return stage:

[0049] Step one: the second electromagnetic valve 206a is turned on, and the first electromagnetic valve 205a, the third electromagnetic valve 207a and the fourth electromagnetic valve 209a are turned off; the air cylinder 301 drives the extrusion column 302 to extrude the liquid tank 201, and the gas in the liquid tank 201 enters the mixing chamber 202b, and then the second electromagnetic valve 206a is turned off;

[0050] It is worth noting that the pressure of the gas in the liquid tank 201 entering the mixing chamber 202b cannot overcome the elastic force of the floating safety disc 204b, so the separation disc 204a cannot be pushed to move downward at this time;

[0051] Step two: the third electromagnetic valve 207a is turned on, and the first electromagnetic valve 205a, the second electromagnetic valve 206a and the fourth electromagnetic valve 209a are turned off; at this time, the water in the dripping pipe 203 is returned to the liquid tank 201 under the action of atmospheric pressure.

[0052] The entire water return stage is inserted between step one and step two of the dripping stage to prevent the water in the dripping pipe 203 from freezing.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A water droplet bounce experiment system, characterized in that: The utility model relates to a cable liquid dripping device, which comprises a support (100) for fixing a cable, a liquid storage tank (201) arranged on the support (100), a balance tank (202) arranged on the top of the liquid storage tank (201), and a dripping pipe (203) arranged at the bottom of the liquid storage tank (201). The liquid storage tank (201) is used for storing water, the dripping pipe (203) is connected with the liquid storage tank (201), and the dripping pipe (203) is used for dripping water to the cable. The balance tank (202) is divided into a connecting cavity (202a) and a mixing cavity (202b) by the partition piece (204), the connecting cavity (202a) is connected with the liquid storage tank (201) through a first pipeline (205), and the mixing cavity (202b) is connected with the liquid storage tank (201) through a second pipeline (206).

2. The water droplet bounce experiment system of claim 1, wherein: The partition piece (204) comprises a partition disc (204a), the balance tank (202) is rotatably arranged with a rotating column (202c), the partition disc (204a) is provided with a mounting hole (204a-1), the rotating column (202c) is inserted into the mounting hole (204a-1), the circumferential wall of the rotating column (202c) is provided with a spiral groove (202c-1), the inner circumferential wall of the mounting hole (204a-1) is provided with a protrusion (204a-2), the protrusion (204a-2) is suitable for moving along the contour direction of the spiral groove (202c-1), and the protrusion (204a-2) is in interference fit with the spiral groove (202c-1).

3. The water droplet bounce experiment system of claim 2, wherein: The bottom of the rotating column (202c) is provided with a limiting disc (202d), the bottom of the limiting disc (202d) is provided with a plurality of ratchet grooves (202d-1), the plurality of ratchet grooves (202d-1) are evenly arranged around the circumferential direction of the limiting disc (202d), the top of the liquid storage tank (201) is elastically arranged with an annular ratchet block (201a), and the annular ratchet block (201a) is suitable for being clamped with the ratchet grooves (202d-1).

4. The water droplet bounce experiment system of claim 3, wherein: The partition piece (204) further comprises a floating safety disc (204b), the floating safety disc (204b) is arranged on the side of the partition disc (204a) away from the liquid storage tank (201), and the floating safety disc (204b) is elastically connected with the partition disc (204a).

5. The water droplet bounce experiment system of claim 4, wherein: ​ 6. The water droplet bounce experiment system of claim 5, wherein: The drip pipe (203) comprises a cooling part (203a) and a liquid outlet part (203b), the cooling part (203a) is in the shape of a thread, and the liquid outlet part (203b) is in communication with the cooling part (203a); the cooling part (203a) is in communication with the liquid storage tank (201) through a third pipeline (207), and the water in the liquid storage tank (201) drips out through the third pipeline (207), the cooling part (203a) and the liquid outlet part (203b) in sequence; the cooling part (203a) is used for cooling the water flowing into the cooling part (203a).

7. The water droplet bounce experiment system of claim 6, wherein: The drip unit (200) further comprises an air pump (208) in communication with the mixing cavity (202b) through a fourth pipeline (209), and a fourth electromagnetic valve (209a) is arranged on the fourth pipeline (209); the air pump (208) is used to drive the separation disc (204a) to move towards the liquid storage tank (201), and the distance between the separation disc (204a) and the water surface in the liquid storage tank (201) is constant.

8. The water droplet bounce experiment system of claim 7, wherein: Further comprising a pressing unit (300) comprising a pneumatic cylinder (301), the pneumatic cylinder (301) is arranged on the support (100), and the output end of the pneumatic cylinder (301) presses the liquid storage tank (201) with constant pressing force.

9. The water droplet bouncing experiment system of claim 6 or 7, wherein: The first pipeline (205) is provided with a first electromagnetic valve (205a), the second pipeline (206) is provided with a second electromagnetic valve (206a), and the third pipeline (207) is provided with a third electromagnetic valve (207a); by switching the opening or closing of the first electromagnetic valve (205a), the second electromagnetic valve (206a), the third electromagnetic valve (207a) and the fourth electromagnetic valve (209a), the drip pipe (203) can be switched to return water or drip water with constant pressing force.

10. The water droplet bounce experiment system of claim 8, wherein: Comprise, a control module (400) electrically connected with the air pump (208); a monitoring module (500) electrically connected with the control module (400) and used for shooting and capturing the bouncing process of water droplets falling on the cable; a heat preservation pipe arranged on the liquid storage tank (201) and used for heat preservation of the water in the liquid storage tank (201); an anti-icing cover (700) covering the drip unit (200).

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