Controllable hanging drop experiment device

Abstract

The utility model discloses a controllable hanging drop experimental device, and relates to the technical field of liquid fuel single drop preparation, evaporation and combustion characteristic tests. Comprising a constant-volume combustion bomb, a pipeline system, a liquid storage tank, a support and a micro-control throttle valve. The pressure balance in the liquid storage tank and the constant-volume combustion bomb cavity is kept through the balance pipeline, so that the liquid column static pressure generated by the height difference between the liquid storage tank and the constant-volume combustion bomb is utilized to push the liquid to flow slowly; the flow speed and the flow of liquid can be accurately controlled by adjusting rotation of a motor in the micro-control throttle valve, so that preparation of target liquid drops is realized; a drop hanging part, an ignition part and an electric stove wire heating disc are arranged in the constant-volume combustion bomb, and experiments such as preparation, ignition and evaporation of liquid drops can be completed respectively. The device can realize experiments of droplet preparation, ignition, evaporation and the like under multiple working conditions, and the droplet hanging process has controllability, so that the accuracy and efficiency of the experiments are improved, and the device is a set of droplet hanging device capable of further realizing automation and intellectualization.

Description

Technical Field

[0001] This utility model relates to the field of liquid fuel single droplet preparation, evaporation and combustion characteristic testing technology, and in particular to a controllable droplet experimental device. Background Technology

[0002] The evaporation and combustion process of fuel droplets, as the core unit of spray combustion technology, is crucial for in-depth exploration and understanding of spray combustion phenomena and their underlying mechanisms. Detailed research on the evaporation and combustion characteristics of individual droplets is not only the foundation for constructing theoretical models of spray combustion but also a necessary step in promoting the efficient utilization and optimized design of liquid fuels in various application fields. The droplet-binding device integrates experimental functions such as droplet preparation, droplet combustion, and high-temperature heating evaporation. This experimental setup can be used to study the evaporation and combustion characteristics of different liquid fuels. The formation of droplets of a specified diameter during the experiment is a key aspect. Traditional experimental methods involve the experimenter manually and slowly pushing the syringe to bind the droplets. When the constant-volume combustion chamber is under vacuum or positive pressure, the large pressure difference makes it difficult to control the flow rate of the fluid inside the tube, which not only hinders droplet formation but also increases safety risks during the experiment. Summary of the Invention

[0003] The purpose of this invention is to provide a controllable dripping experimental device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A controllable dripping experimental device includes: a constant-volume combustion bomb as the core component of the experimental device, a support set on the upper surface of the constant-volume combustion bomb, a micro-controlled throttling valve installed on the first platform of the support, a liquid storage tank installed on the second layer of the support, and a pipeline system connecting the constant-volume combustion bomb, the liquid storage tank, and the micro-controlled throttling valve.

[0006] Furthermore, the constant-volume incendiary bomb includes a front end cap, a first fastener, a bomb body, a drip-hanging component, a rear end cap, an ignition component, an electric heating element heating plate, a liquid collection bowl, and a viewing window.

[0007] The projectile body is the outer wall structure of a constant volume incendiary projectile, and the front end cover and the rear end cover are disposed at the front and rear of the outer wall structure, respectively; the front end cover is clamped and installed with the viewing window glass by a first fastener;

[0008] The drip-hanging component is located in the middle of the top surface of the constant-volume incendiary bomb, and the liquid collection bowl is placed directly below the drip-hanging component;

[0009] The two ignition components are symmetrically arranged on the side of the constant volume combustion bomb; the heating plate of the heating element is placed below the ignition components, and the heating plate of the heating element is coaxially arranged with the two ignition components.

[0010] Furthermore, the drip-hanging component includes metal fiber filaments, a needle tube, a flange, a threaded connector, a lower connector, a sealing ring, a threaded cap, and an upper connector. The metal fiber filament has a smooth surface roughness of no more than Ra at its shaft end, and a spherical bottom end located at the center of the ignition component. The metal fiber filament passes through the needle tube and is positioned along the center of the ignition component. The bottom end of the needle tube is a goose-shaped tube, and the end of the goose-shaped tube is welded or threaded to the lower connector. The drip-hanging component is installed at the center of the top surface of the constant-volume incendiary bomb via a flange and a second fastener.

[0011] The threaded connector has an internal thread at the bottom and an external thread at the top, with the external thread length being greater than the internal thread length of the threaded sleeve. The lower part of the threaded connector is threadedly connected to the flange, and the upper part of the threaded connector is threadedly connected to the threaded sleeve.

[0012] The lower connector has four small holes on its top boss that mate with the bottom convex round platform of the upper connector. The lower part of the platform is conical, and the diameter of the small end hole is the same as the diameter of the needle tube. A sealing ring is provided between the lower connector and the upper connector. The inner diameter of the sealing ring is the same as the outer diameter of the boss of the upper and lower connectors, and the outer diameter is the same as the inner diameter of the threaded sleeve.

[0013] Furthermore, the micro-controlled throttle valve includes a motor, a pinion, a gear, and a valve body. The motor has the function of variable frequency forward and reverse rotation, and its output shaft end is provided with a pinion, which meshes with the gear. The valve body has the function of regulating flow rate, and its end is provided with a gear. The valve body is a valve structure, and the shaft connected to the gear is the valve stem. The flow rate of the valve body is adjusted by rotating the valve stem through the forward and reverse rotation of the gear.

[0014] Furthermore, the storage tank is a flat-topped cylindrical container with a visible liquid level gauge marked with graduation lines on the cylindrical body. The liquid outlet connector of the storage tank is located at the center of the bottom end cap, and the inside of the liquid outlet connector is equipped with an anti-vortex sleeve with full through holes. The support ring plate is located on the outside of the shell, and the top of the shell is equipped with a flat-topped cover. The flat-topped cover is equipped with an injection pipe connector, a balance pipe connector, and a vent valve connector. The injection pipe connector is located at the center of the flat-topped cover and extends inward. The extended pipe is a bend, and the end of the bend fits against the inner wall of the shell. The fit against the inner wall is a beveled cut structure.

[0015] Furthermore, the piping system includes a solenoid valve, an injection / extraction pipeline, a balancing pipeline, a liquid injection pipeline, a discharge pipeline, and a bypass pipeline; the storage tank is connected to both the balancing pipeline and the liquid injection pipeline; the balancing pipeline connects the storage tank and the constant-volume combustion bomb, maintaining pressure balance between the two chambers; a bypass pipeline is installed on the connecting pipeline between the storage tank and the constant-volume combustion bomb, with a glass tube at its end for detecting the bubble content in the fluid; a discharge pipeline is installed on the constant-volume combustion bomb; the injection / extraction pipeline is located on the balancing pipeline; solenoid valves are installed on the balancing pipeline, between the storage tank and the bypass pipeline, between the bypass pipeline and the constant-volume combustion bomb, on the bypass pipeline, on the liquid injection pipeline, and on the discharge pipeline, and the flow of fluid in the pipeline is controlled by the solenoid valves.

[0016] Furthermore, the support structure is equipped with two platforms, and the height of the support structure is not less than 1 meter.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This invention connects the constant-volume incendiary bomb and the storage tank via a balancing pipeline, maintaining pressure balance within the two containers. The storage tank is placed on the second layer of the support so that the liquid inside the tank has a certain liquid column height relative to the constant-volume incendiary bomb. The fluid will slowly flow downwards under a certain hydrostatic pressure.

[0019] 2. This utility model incorporates a micro-controlled throttle valve, in which the motor has a variable frequency forward and reverse rotation function, driving the small gear to rotate in both directions and at different speeds. Under a fixed transmission ratio, the large gear adjusts the opening degree of the throttle valve at a smaller speed, thereby enabling more precise control of the liquid flow rate.

[0020] 3. This utility model is equipped with a threaded connector, and the height of the needle can be adjusted by changing the height of the threaded connector during the needle installation process; at the same time, the orientation of the needle can be determined by the cooperation of the upper and lower connector bosses. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an embodiment of the controllable dripping experimental device of this utility model;

[0022] Figure 2 This is a half-sectional schematic diagram of a constant-volume combustion bomb in a controllable dripping experimental device according to the present invention;

[0023] Figure 3 This is an exploded view and a partially enlarged schematic diagram of the drop-hanging component in a controllable drop-hanging experimental device according to this utility model;

[0024] Figure 4 This is a schematic diagram of a micro-controlled throttling valve in a controllable dripping experimental device according to the present invention;

[0025] Figure 5 This is a schematic diagram of the support frame in a controllable dripping experimental device according to the present invention;

[0026] Figure 6 This is a schematic diagram of the liquid storage tank in a controllable dripping experimental device according to the present invention;

[0027] Figure 7 This is a schematic diagram of the heating plate of the electric heating wire in a controllable dripping experimental device according to this utility model;

[0028] Figure 8 This is a schematic diagram of a threaded joint in a controllable dripping experimental device according to the present invention;

[0029] In the diagram: 1. Constant-volume incendiary bomb; 2. Piping system; 3. Storage tank; 4. Support; 5. Micro-controlled throttle valve; 11. Front end cap; 12. First fastener; 13. Projectile body; 14. Drip hanging component; 15. Rear end cap; 16. Ignition component; 17. Heating element; 18. Collection bowl; 19. Viewing window; 141. Metal fiber filament; 142. Needle; 143. Flange; 144. Second fastener; 145. Threaded connector; 146. Lower connector; 147. 148. Sealing ring; 149. Threaded cap; 211-216. Upper connector; 211-216. Solenoid valve; 22. Gas injection line; 23. Balance line; 24. Liquid injection line; 25. Discharge line; 26. Bypass line; 31. Liquid outlet connector; 32. Housing; 33. Support ring plate; 34. Liquid injection pipe connector; 35. Balance pipe connector; 36. Vent valve pipe connector; 37. Visual level gauge; 51. Motor; 52. Pinion; 53. Gear; 54. Valve body. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] The following is in conjunction with the appendix Figures 1-8 This application will be described in further detail.

[0032] A controllable dripping experimental device includes: a constant volume combustion bomb 1 as the core component of the experimental device, a support 4 disposed on the upper surface of the constant volume combustion bomb 1, a micro-controlled throttling valve 5 installed on the first platform of the support 4, a liquid storage tank 3 installed on the second layer of the support 4, and a pipeline system 2 connecting the constant volume combustion bomb 1, the liquid storage tank 3, and the micro-controlled throttling valve 5.

[0033] The constant-volume incendiary bomb 1 includes a front end cover 11, a first fastener 12, a bomb body 13, a drip-hanging component 14, a rear end cover 15, an ignition component 16, an electric heating element heating plate 17, a liquid collection bowl 18, and a viewing window 19.

[0034] The projectile body 13 is the outer wall structure of the constant volume incendiary bomb 1. The front end cover 11 and the rear end cover 15 are disposed at the front and rear of the outer wall structure, respectively. The front end cover 11 is clamped and installed with the viewing window glass 19 by the first fastener 12.

[0035] The drip-hanging component 14 is disposed in the middle of the top surface of the constant volume incendiary bomb 1, and the liquid collection bowl 18 is placed directly below the drip-hanging component 14;

[0036] The two ignition components 16 are symmetrically arranged on the side of the constant volume combustion bomb 1; the electric heating wire heating plate 17 is placed below the ignition components 16, and the electric heating wire heating plate 17 is coaxially arranged with the two ignition components 16.

[0037] The drip-hanging component 14 includes a metal fiber filament 141, a needle tube 142, a flange 143, a threaded connector 145, a lower connector 146, a sealing ring 147, a threaded cap 148, and an upper connector 149. The bottom end of the metal fiber filament 141 is spherical and located at the center of the ignition component 16. The metal fiber filament 141 passes through the needle tube 142 and is arranged along the center of the ignition component 16. The bottom end of the needle tube 142 is a goose-shaped tube, and the end of the goose-shaped tube is welded or threaded to the lower connector 146. The drip-hanging component 14 is installed on the middle of the top surface of the constant volume incendiary bomb 1 through the flange 143 and the second fastener 144.

[0038] The threaded connector 145 has an internal thread at the bottom and an external thread at the top. The length of the external thread is greater than the length of the internal thread of the threaded sleeve 148. The lower part of the threaded connector 145 is threadedly connected to the flange 143, and the upper part of the threaded connector 145 is threadedly connected to the threaded sleeve 148.

[0039] The lower connector 146 has four small holes on its top boss that mate with the bottom convex round platform of the upper connector 149. Its lower part is conical, and the diameter of the small end hole is the same as the diameter of the needle tube. A sealing ring 147 is provided between the lower connector 146 and the upper connector 149. The inner diameter of the sealing ring 147 is the same as the outer diameter of the boss of the upper and lower connectors, and the outer diameter is the same as the inner diameter of the threaded sleeve 148.

[0040] The micro-controlled throttle valve 5 includes a motor 51, a pinion 52, a gear 53, and a valve body 54. The motor 51 has the function of variable frequency forward and reverse rotation, and a pinion 52 is provided at the end of its output shaft. The pinion 52 meshes with the gear 53. The valve body 54 has the function of regulating flow rate, and a gear 53 is provided at its end.

[0041] The storage tank 3 is a cylindrical container with a flat top cover. A visual level gauge 37 with graduation lines is installed on the shell 32 of the storage tank 3. The liquid outlet connector 31 of the storage tank 3 is located at the center of the bottom end cap. The liquid outlet connector 31 is provided with an anti-vortex sleeve with full through holes inside. The support ring plate 33 is located on the outside of the shell 32. The top of the shell 32 is provided with a flat top cover. The flat top cover is provided with an injection pipe connector 34, a balance pipe connector 35 and a vent valve pipe connector 36. The injection pipe connector 34 is located at the center of the flat top cover and extends inward. The extended pipe is a bend. The end of the bend fits against the inner wall of the shell 32. The fit against the inner wall is a beveled structure.

[0042] The pipeline system 2 includes a solenoid valve, an injection / extraction pipeline 22, a balancing pipeline 23, a liquid injection pipeline 24, a discharge pipeline 25, and a bypass pipeline 26. The liquid storage tank 3 is connected to the balancing pipeline 23 and the liquid injection pipeline 24. The balancing pipeline 23 connects the liquid storage tank 3 and the constant-volume combustion bomb 1, and maintains pressure balance between the two chambers of the liquid storage tank 3 and the constant-volume combustion bomb 1. A bypass pipeline 26 is installed on the connecting pipeline between the liquid storage tank 3 and the constant-volume combustion bomb 1, and a glass tube is installed at its end to detect the bubble content in the fluid. The constant-volume combustion bomb 1 is equipped with a discharge pipeline 25. The injection / extraction pipeline 22 is installed on the balancing pipeline 23. Solenoid valves are installed on the balancing pipeline 23, between the liquid storage tank 3 and the bypass pipeline 26, between the bypass pipeline 26 and the constant-volume combustion bomb 1, on the bypass pipeline 26, on the liquid injection pipeline 24, and on the discharge pipeline 25. The flow of fluid in the pipeline is controlled by the solenoid valves.

[0043] The support 4 is provided with two-layer platforms, and the height of the support 4 is not less than 1 meter. Example

[0044] This embodiment discloses a controllable dripping experimental device. (See reference...) Figure 1 , 5 As shown, this apparatus uses a constant-volume combustion bomb 1 as the experimental container. The preparation, evaporation, and combustion of the droplets can be observed through the viewing window 19. A support 4 is placed on top of the constant-volume combustion bomb 1, with its center aligned with the droplet-hanging component 14. The support 4 is supported by four angle steels and has two platforms. The first platform houses the micro-controlled throttling valve 5, and the second platform houses the liquid storage tank 3. The liquid storage tank 3 is connected to the droplet-hanging component 14 via a pipeline. From top to bottom, the pipeline includes a solenoid valve 212, the micro-controlled throttling valve 5, a bypass pipeline 26, and a solenoid valve 213. At the beginning of droplet preparation, solenoid valve 212 is opened and solenoid valve 213 is closed. The content of air bubbles in the fluid is observed through the bypass pipeline 26. When no air bubbles appear, the bypass pipeline is closed, and solenoid valve 213 is opened. The flow rate and velocity of the liquid are adjusted through the micro-controlled throttling valve 5 to form the target droplet.

[0045] For reference Figure 2 , 7As shown in Figure 8, the main functional components of the incendiary bomb 2, arranged from top to bottom, are a drop-hanging component 14, an ignition component 16, an electric heating wire heating plate 17, and a liquid collection bowl 18. The drop-hanging component 14 primarily prepares the droplets. The ignition component 16 ignites the droplets at room temperature by energizing two spark plugs. The electric heating wire heating plate 17 heats the ambient temperature to the experimental temperature. The liquid collection bowl 18 collects the dripping liquid to prevent it from contaminating the chamber environment. (See reference...) Figure 3 As shown, the metal fiber filament 141 should have a smooth surface with a roughness of no more than Ra1.6 to ensure that its rod does not retain liquid. The bottom end is spherical to better catch the droplets. The bottom spherical end should be aligned with the center of the two ignition components 16 and the heating plate 17 of the electric furnace wire. The bottom end of the needle tube 142 should be set as a goose-shaped tube so that the absence of liquid at the needle tube outlet will not affect the combustion effect of the droplets. The threaded connector 145 has an internal thread at the bottom and an external thread at the top. The length of the upper external thread should be greater than the length of the internal thread of the threaded sleeve 148 to ensure the sealing effect of the sealing ring 147. The lower internal thread fills the inner hole to ensure sufficient thread length for adjusting the height of the needle tube 142. The top boss of the lower connector 146 has four small holes that cooperate with the bottom convex round platform of the upper connector 149. The position of the lower connector and the needle tube can be adjusted by rotating the upper connector 149.

[0046] For reference Figure 4 As shown, the micro-controlled throttle valve 5 is driven by the motor 51 to drive the pinion 52 to achieve forward and reverse rotation and speed change. The meshing of the large and small gears has a large transmission ratio, which makes the large gear 53 rotate more slowly to achieve the opening degree inside the micro-controlled valve body, thereby more accurately controlling the flow rate and speed of the fluid in the pipeline.

[0047] For reference Figure 1 , 6 As shown, a liquid outlet connector 31 is located at the center of the elliptical end cap at the bottom of the storage tank 3. The inside of the liquid outlet connector 31 is fitted with a sleeve with numerous through holes to prevent eddies and air bubbles from being introduced during fluid flow. The inner extension of the injection pipe connector 34 is a bent pipe, with its end fitting snugly against the inner wall of the cylinder. The end has a slanted cut to allow the liquid to flow downwards along the cylinder wall, preventing air bubbles from forming during injection. The vent valve connector 36 connects to the vent line and needs to be opened during injection and venting. The balance pipe connector 35 connects to the balance line 23 and is opened during inflation or vacuuming to maintain pressure balance between the two containers. The visual level gauge 37 is marked with graduations, allowing real-time monitoring of the liquid level in the storage tank.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A controllable hanging drop experimental device, characterized in that, It includes: The constant volume combustion bomb (1) is the core component of the experimental device, the bracket (4) is arranged on the upper surface of the constant volume combustion bomb (1), the micro-control throttle valve (5) is installed on the first layer platform of the bracket (4), the liquid storage tank (3) is installed on the second layer of the bracket (4), and the pipeline system (2) is communicated with the constant volume combustion bomb (1), the liquid storage tank (3) and the micro-control throttle valve (5).

2. The controllable hanging-drop laboratory device according to claim 1, characterized in that: The constant volume combustion bomb (1) includes a front end cover (11), a first fastener (12), a bomb body (13), a hanging drop component (14), a rear end cover (15), an ignition component (16), an electric furnace wire heating disc (17), a liquid collecting bowl (18) and a window glass (19); The bomb body (13) is the outer wall structure of the constant volume combustion bomb (1), the front end cover (11) and the rear end cover (15) are arranged at the front and rear parts of the outer wall structure; the front end cover (11) clamps and installs the window glass (19) through the first fastener (12); The hanging drop component (14) is arranged in the middle of the top surface of the constant volume combustion bomb (1), and the liquid collecting bowl (18) is placed at a position directly below the hanging drop component (14); The two ignition components (16) are symmetrically arranged on the side parts of the constant volume combustion bomb (1); the electric furnace wire heating disc (17) is placed below the ignition component (16), and the electric furnace wire heating disc (17) and the two ignition components (16) are coaxially arranged.

3. The controllable hanging-drop laboratory device according to claim 2, characterized in that: The hanging drop component (14) includes a metal fiber wire (141), a needle tube (142), a flange (143), a threaded joint (145), a lower joint (146), a sealing sleeve ring (147), a threaded sleeve cover (148) and an upper joint (149); the bottom end of the metal fiber wire (141) is spherical and located at the center position of the ignition component (16); the metal fiber wire (141) is arranged along the center of the ignition component (16) through the needle tube (142); the bottom end of the needle tube (142) is a goose-shaped tube, and the end part of the goose-shaped tube is welded or threadedly connected with the lower joint (146); the hanging drop component (14) is installed in the middle of the top surface of the constant volume combustion bomb (1) through the flange (143) and the second fastener (144); The lower part of the threaded joint (145) is internally threaded, the upper part is externally threaded, and the length of the external thread is greater than the length of the internal thread of the threaded sleeve cover (148); the lower part of the threaded joint (145) is threadedly connected with the flange (143), and the upper part of the threaded joint (145) is threadedly connected with the threaded sleeve cover (148); The top boss of the lower joint (146) is provided with four small holes matched with the bottom convex circular table of the upper joint (149), and the lower part is conical, and the small end hole diameter is consistent with the needle tube diameter; the sealing sleeve ring (147) is arranged between the lower joint (146) and the upper joint (149), the inner diameter of the sealing sleeve ring (147) is consistent with the outer diameter of the boss of the upper and lower joints, and the outer diameter is consistent with the inner diameter of the threaded sleeve cover (148).

4. The controllable hanging-drop laboratory device of claim 1, wherein: The micro-control throttle valve (5) comprises a motor (51), a pinion (52), a gear wheel (53) and a valve body (54); the motor (51) has the function of variable frequency rotation in two directions, and the output shaft end of the motor (51) is provided with the pinion (52), and the pinion (52) is engaged with the gear wheel (53); the valve body (54) has the function of adjusting flow, and the end is provided with the gear wheel (53).

5. The controllable hanging-drop laboratory device of claim 1, wherein: The liquid storage tank (3) is a flat top cover cylindrical container, the shell (32) of the liquid storage tank (3) is provided with a visual liquid level meter (37) and is marked with a scale line; the liquid outlet joint (31) of the liquid storage tank (3) is arranged at the center position of the bottom head, and the liquid outlet joint (31) is provided with an anti-vortex sleeve with full through holes inside; the support ring plate (33) is arranged outside the shell (32), and the top of the shell (32) is provided with a flat top cover; the flat top cover is provided with a liquid filling pipe joint (34), a balance pipe joint (35) and a vent valve pipe joint (36), the liquid filling pipe joint (34) is arranged at the center of the flat top cover and extends inward, the extended pipe is a bent pipe, the end of the bent pipe is attached to the inner wall of the shell (32), and the attachment is a bevel structure.

6. The controllable hanging-drop laboratory device of claim 1, wherein: The pipeline system (2) comprises a solenoid valve, a suction and injection gas pipeline (22), a balance pipeline (23), a liquid injection pipeline (24), a discharge pipeline (25) and a bypass pipeline (26); the liquid storage tank (3) is connected with the balance pipeline (23) and the liquid injection pipeline (24) respectively; the balance pipeline (23) communicates the liquid storage tank (3) with the constant volume combustion bomb (1), and keeps the pressure balance between the two cavities of the liquid storage tank (3) and the constant volume combustion bomb (1); the bypass pipeline (26) is arranged on the communication pipeline between the liquid storage tank (3) and the constant volume combustion bomb (1), and a section of glass tube is arranged at the end of the bypass pipeline (26) to detect the bubble content in the fluid; the constant volume combustion bomb (1) is provided with a discharge pipeline (25); the suction and injection gas pipeline (22) is arranged on the balance pipeline (23); solenoid valves are arranged on the balance pipeline (23), between the liquid storage tank (3) and the bypass pipeline (26), between the bypass pipeline (26) and the constant volume combustion bomb (1), on the bypass pipeline (26), on the liquid injection pipeline (24) and on the discharge pipeline (25), and the flow of fluid in the pipeline is controlled by the solenoid valves.

7. The controllable hanging-drop laboratory device of claim 1, wherein: The support (4) is provided with two layers of platforms.

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