An auxiliary measuring device for underwater explosion visualization experiment

Abstract

The application discloses an underwater explosion visualized experiment auxiliary measuring device, which comprises an observation cylinder, a positioning bottom cylinder and a pulley set. The observation cylinder is located in the middle of the positioning bottom cylinder and comprises a top plate, a support plate and a suspended plate. The top plate is supported by the top ends of two vertically and parallel arranged support plates and is bonded by UV glue. The suspended plate is vertically bonded on the two sides of the support plate and the top plate by UV glue. The positioning bottom cylinder comprises a positioning long plate and a positioning short plate. The positioning long plate is arranged at the two ends of the cylinder surface of the positioning bottom cylinder, and the positioning short plate is arranged at the bottom of the cylinder. The pulley set comprises a front wheel, a rear wheel, a bottom wheel and a three-hole plate. The front wheel, the rear wheel and the bottom wheel are fixed on the three-hole plate through bearings and support rods. The three-hole plate is bonded on the two sides of the positioning bottom cylinder by UV glue. The device is used in combination with a high-pressure spark bubble preparation device to fix the bubble preparation position, improve the repeatability of the experiment and reduce the error caused by the experiment device.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of underwater explosion experiment measurement, and particularly relates to an underwater explosion visual experiment auxiliary measurement device. BACKGROUND

[0002] At present, new level ships all need to be subjected to underwater explosion resistance test, which shows the importance of underwater explosion. The underwater explosion experiment is not simple, and both the bubble needs to be fully observed and recorded and the test repeatability needs to be ensured to eliminate the influence of the experimental device on the result as much as possible.

[0003] The existing experimental water tank is a water tank with the same thickness from top to bottom. In order to ensure sufficient space for observing the underwater explosion of the bubble, a larger volume needs to be set, which is very bulky and occupies a large space. In addition, two electrodes of a high-voltage spark bubble preparation device are often fixed by using adhesive tape, which leads to an undesirable bubble generation position, and the specific explosion position is not recorded, so the test repeatability is poor. SUMMARY

[0004] The underwater explosion visual experiment auxiliary measurement device is provided.

[0005] The underwater explosion visual experiment auxiliary measurement device is provided.

[0006] The underwater explosion visual experiment auxiliary measurement device comprises an observation cylinder, a positioning bottom cylinder and a pulley block. The observation cylinder is located in the middle of the positioning bottom cylinder and comprises a top plate, a support plate and a suspended plate. The top plate is supported by the top ends of two vertically and parallel arranged support plates and is bonded by UV glue. The suspended plate is vertically bonded to the two sides of the support plate and the top plate by UV glue. The positioning bottom cylinder comprises a positioning long plate and a positioning short plate. The positioning long plates are arranged at both ends of the cylinder surface of the positioning bottom cylinder, and the positioning short plate is arranged at the bottom of the cylinder. The pulley block comprises a front wheel, a rear wheel, a bottom wheel and a three-hole plate. The front wheel, the rear wheel and the bottom wheel are fixed on the three-hole plate through bearings and support rods. The three-hole plate is bonded to the two sides of the positioning bottom cylinder by UV glue.

[0007] Further, each of the positioning long plates at both ends of the positioning bottom cylinder is provided with a circular hole channel. The circular hole channel is an inclined straight channel in the positioning long plate. The outer opening of the circular hole channel is higher than the inner opening. The inner opening is aligned with the copper wire insertion hole arranged on the support plate of the observation cylinder. The other support plate is provided with a guide pipe.

[0008] Further, the front wheel, the rear wheel and the bottom wheel of the pulley block are of the same size and can rotate freely. A groove is arranged in the middle of the front wheel, the rear wheel and the bottom wheel. The upper end of the groove of the front wheel and the rear wheel is tangent to the extended line of the axis of the circular hole channel.

[0009] The underwater explosion visual experiment auxiliary measurement device has the following advantages.

[0010] 1. The application is used in combination with high-voltage spark bubble production device, realizes the fixation of bubble production position, improves the repeatability of test and reduces the error caused by test device.

[0011] 2. By using negative pressure principle, the bubble produced by explosion can be observed and measured in the observation cylinder, unnecessary volume is reduced, there is no shielding of other test equipment, and it is more convenient for camera shooting and recording.

[0012] 3. By setting round hole channel, copper wire into hole and guide pipe, the direction is determined when the electrode is inserted each time, the distance of electrode insertion each time can be recorded by setting pulley block after the direction is determined, the fixation of bubble production position is realized, the repeatability of test is improved, and the error caused by test device is reduced.

[0013] 4. The setting of suspended plate makes some other experimental operations more convenient, for example, after shooting and recording bubble, calibration work is often needed, the space below the suspended plate is enough to insert calibration plate to calibrate. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 Fig. 1 is a structural schematic view of underwater explosion visualization experiment auxiliary measuring device of the application;

[0015] Figure 2 Fig. 2 is a top view of positioning bottom cylinder of the application;

[0016] Figure 3 Fig. 3 is a connection structure diagram of pulley block of the application;

[0017] Figure 4 Fig. 4 is a structural schematic view of observation cylinder of the application;

[0018] Figure 5 Fig. 5 is a structural schematic view of guide pipe of the application. DETAILED DESCRIPTION

[0019] The application will be further described below in combination with the drawings.

[0020] As Figure 1 and 2As shown, an underwater explosion visualization experimental auxiliary measurement device includes an observation cylinder, a positioning base cylinder 8, and a pulley system. The top plate 10 of the observation cylinder is located above the positioning base cylinder 8, and the observation cylinder is fixed in position by a positioning short plate 2 and a positioning long plate 7. In the actual experiment, water is first added to the positioning base cylinder 8 until the water level is flush with the outside of the circular hole channel 3. Then, a flexible hose is inserted into the observation cylinder from below the suspension plate 11 and above the water surface to pump out the air. After the water level in the observation cylinder rises, the water level in the positioning base cylinder 8 will drop, keeping the water level line always below the outside of the circular hole channel 3. The water addition and air venting operations are repeated until the observation cylinder is full of water and there is no more air.

[0021] like Figures 3 to 5 As shown, the pulley system is used to fix the copper wire in a fixed position. In the actual experiment, the scale lines on the rear wheel 5, bottom wheel 6 and front wheel 4 are first recorded on the three-hole plate 9. Then, the copper wire is passed around the rear wheel 5, bottom wheel 6 and front wheel 4 in sequence. Finally, it is inserted into the observation cylinder through the round hole channel on the positioning plate 7, the copper wire insertion hole 12 on the support plate 1 and the guide tube 13. The copper wire on the other side is inserted through the same operation. After they are successfully connected together inside the cylinder, the scale lines on the rear wheel 5, bottom wheel 6 and front wheel 4 on both sides are recorded on the three-hole plate 9 for the purpose of repeating the subsequent experiment.

[0022] In actual measurement, an underwater explosion is performed by using a high-voltage electric spark bubble generator. At the same time, the phenomena in the cylinder are recorded and observed using a high-speed camera and other measurement methods. After the measurement is completed, the scale lines on the rear wheel 5, bottom wheel 6 and front wheel 4 are realigned with the scale lines recorded on the three-hole plate 9. The copper wire is then inserted into the same position again, and the test can be repeated.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An auxiliary measurement device for underwater explosion visualization experiments, characterized in that: The system includes an observation cylinder, a positioning base cylinder (8), and a pulley assembly. The observation cylinder is located in the middle of the positioning base cylinder (8) and includes a top plate (10), a support plate (1), and a suspended plate (11). The top plate (10) is supported by the tops of two vertically parallel support plates (1) and is bonded with UV adhesive. The suspended plate (11) is vertically bonded to both sides of the support plate (1) and the top plate (10) with UV adhesive. The positioning base cylinder (8) includes a positioning long plate (7) and a positioning short plate (2). The positioning long plate (7) is provided at both ends of the cylinder surface of the positioning base cylinder, and the positioning short plate (2) is provided at the bottom of the cylinder. The pulley assembly includes a front wheel (4). The rear wheel (5), bottom wheel (6) and three-hole plate (9) are fixed to the three-hole plate (9) by bearings and support rods. The three-hole plate (9) is glued to both sides of the positioning base cylinder (8) with UV glue. There are scale lines on the rear wheel (5), bottom wheel (6) and front wheel (4). The top plate (10) of the observation cylinder is located above the positioning base cylinder (8). In the actual experiment, water is added to the positioning base cylinder (8) until the water level is level with the outside of the round hole channel (3). Then a hose is inserted from below the suspension plate (11) into the observation cylinder and above the water level to pump out the air.

2. The underwater explosion visualization experimental auxiliary measurement device according to claim 1, characterized in that: The positioning base cylinder (8) has a circular hole channel (3) on each of the positioning plates (7) at both ends. The circular hole channel (3) is an inclined straight channel inside the positioning plate (7). The outer opening of the circular hole channel (3) is higher than the inner opening. The inner opening is aligned with the copper wire insertion hole (12) on the support plate (1) of the observation cylinder. The inner side of the other support plate (1) is provided with a guide tube (13).

3. The underwater explosion visualization experimental auxiliary measurement device according to claim 1, characterized in that: The front wheel (4), rear wheel (5) and bottom wheel (6) of the pulley group are of the same size and can rotate freely. They have a groove in the middle, and the upper end of the groove of the front wheel (4) and the rear wheel (5) is tangent to the extension line of the axis of the circular hole channel.

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