Underwater bubble curtain generating device

Abstract

The utility model discloses an underwater bubble curtain generating device which comprises two sets of bubble curtain generating pipes arranged in parallel and two sets of supporting frames arranged in parallel, a plurality of sets of bubble holes are evenly formed in the surfaces of the bubble curtain generating pipes, and the bubble holes are located in the same straight line. The arrangement direction of the bubble curtain generating pipes is the same as that of the supporting frame, the bubble curtain generating pipes are arranged above the supporting frame, and the two sets of bubble curtain generating pipes are symmetrical along the central axis in the arrangement direction. Hose connectors used for being externally connected with hoses are formed in one ends of the two sets of bubble curtain generating pipes, and the bubble curtain generating pipes are connected with an air compressor through the hose connectors and the external hoses in sequence. The spraying direction of the air outlet holes can be changed, bubbles of the double rows of air outlet holes are converged, and the problem that the air outlet amount of a single row of bubble holes is too low due to insufficient supply of an air compressor caused by too long laid pipelines is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of bubble curtain generating equipment, in particular to an underwater bubble curtain generating device. Background Technique

[0002] The underwater bubble curtain generating device is a commonly used device for simulating the attenuation effect experiment of underwater explosion shock waves. The existing devices have the following problems:

[0003] (1) Affected by the power of the air compressor, if the laying distance of the bubble curtain generating pipe is too long, the air output of the air outlet holes will be uneven, and the air output of some air outlet holes will be lower than expected, affecting the progress of the attenuation effect experiment of underwater explosion shock waves;

[0004] (2) When the bubble curtain generating pipe is directly laid underwater, it is easily affected by sediment, which easily causes the air outlet holes of the generating pipe to be blocked, affecting the formation of the bubble curtain. The air output of the blocked air outlet holes becomes smaller, destroying the overall uniformity of the bubble curtain and reducing the attenuation ability of the underwater shock wave;

[0005] (3) Affected by hydrological conditions, the generated bubble curtain will diffuse due to water flow factors, resulting in gaps between the air outlet holes and being unable to effectively "intercept" the underwater shock wave;

[0006] (4) The rising process of the bubble curtain belongs to a gas-liquid two-phase flow and conforms to the motion characteristics of a bubble plume. Therefore, the bubble curtain will generate lateral vibration during the rising stage, resulting in lateral divergence of the bubble curtain, reducing the bubble density of the bubble curtain, and increasing the pores between bubbles, affecting the attenuation effect of the bubble curtain. Content of the Utility Model

[0007] The utility model aims to solve at least one of the technical problems in the related technologies to some extent. For this reason, an object of the utility model is to provide an underwater bubble curtain generating device, which changes the jet direction of the air outlet holes, converges the double-row exhaust air bubbles, makes up for the problem of too low air output of a single exhaust air bubble hole caused by insufficient supply of the air compressor due to too long pipeline laying, and is beneficial to increasing the bubble density and improving the problem of the water flow "scattering" the bubble curtain.

[0008] An underwater bubble curtain generating device proposed according to the present utility model includes two groups of bubble curtain generating pipes arranged in parallel and two groups of supports arranged in parallel. The surface of the bubble curtain generating pipe is evenly provided with multiple groups of bubble holes, and the bubble holes are located on the same straight line. The arrangement direction of the bubble curtain generating pipes is the same as the arrangement direction of the supports. The bubble curtain generating pipes are arranged above the supports. The two groups of bubble curtain generating pipes are symmetric about the central axis in the arrangement direction. One end of each of the two groups of bubble curtain generating pipes is provided with a hose interface for connecting an external hose, and the bubble curtain generating pipes are sequentially connected to an air compressor through the hose interfaces and external hoses.

[0009] Preferably, bearing seats are connected to both sides of the two groups of bubble curtain generating pipes. The lower ends of the bearing seats are fixed to the supports through fixing plates. Gears are installed on the same side of the two groups of bubble curtain generating pipes, and the two groups of bubble curtain generating pipes are connected by gear meshing.

[0010] Preferably, limiting and fixing members for preventing the bubble curtain generating pipes from rotating are installed on both sides of the two groups of bubble curtain generating pipes.

[0011] Preferably, the limiting and fixing members include four groups of fixing rings. The four groups of fixing rings are respectively arranged on both sides of the two groups of bubble curtain generating pipes. The two groups of fixing rings on the same side are connected by connecting rods. Threaded holes for connecting fixing bolts are provided on the side walls of the fixing rings, and the fixing rings are fixed to the side walls of the bubble curtain generating pipes by tightening the fixing bolts.

[0012] Preferably, multiple groups of fixing holes for connecting with the fixing plates are evenly provided on the upper surface of the support along the length direction. The fixing plates and the fixing holes are fixed by screws, and the fixing positions of the fixing plates can be adjusted according to the positions of the fixing holes.

[0013] Preferably, a sliding groove is provided on the fixing plate along the direction perpendicular to the arrangement direction of the support. The lower end of the bearing seat is fixed to the sliding groove by screws.

[0014] The beneficial effects in the present utility model are as follows:

[0015] (1) Change the spraying direction of the air outlet holes to make the bubbles of the double-row air bubble holes converge, and make up for the problem of too low air output of the single-row air bubble holes caused by insufficient supply of the air compressor due to too long pipeline laying.

[0016] (2) Raise the bubble curtain generating pipes through the supports to effectively improve the problem of sediment clogging the air outlet holes.

[0017] (3) By using the Coanda effect, the lateral divergence of the bubble curtain during the rising process can be effectively improved, which is beneficial to increasing the bubble density and can solve the problem of the water flow "scattering" the bubble curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In the drawings:

[0019] Figure 1 is a schematic structural diagram of an underwater bubble curtain generating device proposed by the present utility model;

[0020] Figure 2 is a schematic structural diagram of the bearing seat part proposed by the present utility model;

[0021] Figure 3 is a schematic structural diagram of the gear part proposed by the present utility model;

[0022] Figure 4 is a schematic structural diagram of the limit fixing part proposed by the present utility model;

[0023] Figure 5 is an effect diagram of the underwater bubble curtain generating device proposed by the present utility model generating a bubble curtain.

[0024] In the figure: 1 - bubble curtain generating pipe, 2 - bubble holes, 3 - fixing plate, 4 - hose interface, 5 - bearing seat, 6 - fixing holes, 7 - support frame, 8 - gear, 9 - limit fixing part, 91 - fixing ring, 92 - fixing bolt, 93 - connecting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Referring to Figure 1 , an underwater bubble curtain generating device includes two groups of parallel bubble curtain generating pipes 1 and two groups of parallel support frames 7. A plurality of groups of bubble holes 2 are evenly formed on the surface of the bubble curtain generating pipe 1 and the bubble holes 2 are located on the same straight line. The arrangement direction of the bubble curtain generating pipe 1 is the same as that of the support frame 7. The bubble curtain generating pipe 1 is arranged above the support frame 7. The two groups of bubble curtain generating pipes 1 are symmetric about the central axis in the arrangement direction. One end of each of the two groups of bubble curtain generating pipes 1 is provided with a hose interface 4 for connecting to an external hose. The bubble curtain generating pipe 1 is sequentially connected to an air compressor through the hose interface 4 and the external hose.

[0026] Referring to Figure 1 , Figure 2 and Figure 3 , bearing seats 5 are connected to both sides of the two groups of bubble curtain generating pipes 1. The lower end of the bearing seat 5 is fixed to the support frame 7 through a fixing plate 3. Gears 8 are installed on the same side of the two groups of bubble curtain generating pipes 1. The two groups of bubble curtain generating pipes 1 are meshed and connected through the gears 8.

[0027] The upper surface of the support frame 7 is evenly provided with multiple groups of fixing holes 6 for connecting with the fixing plate 3 along the length direction. The fixing plate 3 and the fixing holes 6 are fixed by screws, and the fixing position of the fixing plate 3 can be adjusted according to the position of the fixing holes 6.

[0028] The fixing plate 3 is provided with a sliding groove along the direction perpendicular to the arrangement of the support frame 7, and the lower end of the bearing seat 5 is fixed to the sliding groove by screws.

[0029] Refer to Figure 1 and Figure 4 As shown in, on both sides of the two groups of bubble curtain generating pipes 1, there are installed limiting and fixing parts 9 to prevent the bubble curtain generating pipes 1 from rotating.

[0030] The limiting and fixing part 9 includes four groups of fixing rings 91. The four groups of fixing rings 91 are respectively arranged on both sides of the two groups of bubble curtain generating pipes 1. The two groups of fixing rings 91 on the same side are connected by a connecting rod 93. The side wall of the fixing ring 91 is provided with a threaded hole for connecting a fixing bolt 92, and the fixing ring 91 is fixed to the side wall of the bubble curtain generating pipe 1 by tightening the fixing bolt 92.

[0031] Working principle:

[0032] Assemble the bubble curtain generating pipes 1, the fixing plate 3, the bearing seat 5, the support frame 7, the gear 8 and the limiting and fixing parts 9 as required. After assembly, rotate the bubble curtain generating pipes 1 inward to a predetermined position. Since the two groups of bubble curtain generating pipes 1 are meshed by the gear 8, the two groups of bubble curtain generating pipes 1 will rotate to the predetermined position simultaneously. Tighten the fixing bolt 92 in the fixing part 9 to fix the bubble curtain generating pipes 1. Connect an external hose to the hose interface and connect it to an air compressor. Open the air compressor, and the bubbles ejected through the converging double exhaust bubble holes 2 will increase the bubble density in this area, forming an effective bubble curtain to attenuate the underwater shock wave.

[0033] As Figure 5 shown, according to the Coanda effect in the gas-liquid two-phase flow, when a fluid approaches another fluid, there will be a tendency to deflect towards the other fluid, and this effect will effectively separate the gas-liquid two-phase. According to this effect, a small spacing is adopted between the double exhaust bubble curtain generating pipes 1. The bubbles ejected by them will tend to converge with each other under the influence of the Coanda effect, thereby reducing the lateral oscillation of the bubble curtain and making it keep a tendency to move closer to the center to a great extent during the rising process. At the same time, the influence of the water flow on the bubble curtain can be reduced.

Claims

1. An underwater bubble curtain generating device, characterized in that: The invention comprises two groups of bubble curtain generating tubes (1) arranged in parallel and two groups of supporting frames (7) arranged in parallel. The surface of the bubble curtain generating tubes (1) is evenly provided with a plurality of groups of bubble holes (2) and the bubble holes (2) are located on the same straight line. The arrangement direction of the bubble curtain generating tubes (1) is the same as the arrangement direction of the supporting frames (7). The bubble curtain generating tubes (1) are arranged above the supporting frames (7). The two groups of bubble curtain generating tubes (1) are symmetrical along the central axis in the arrangement direction. One end of the two groups of bubble curtain generating tubes (1) is provided with a hose interface (4) for an external hose. The bubble curtain generating tubes (1) are connected to an air compressor via the hose interface (4) and the external hose in sequence.

2. An underwater bubble curtain generating device according to claim 1, characterized in that: Both sides of the two groups of bubble curtain generating tubes (1) are connected with bearing seats (5), and the lower ends of the bearing seats (5) are fixed to the support frame (7) via a fixing plate (3). Gears (8) are installed on the same side of the two groups of bubble curtain generating tubes (1), and the two groups of bubble curtain generating tubes (1) are meshedly connected via the gears (8).

3. An underwater bubble curtain generating device according to claim 2, characterized in that: Position limiting fixing members (9) for preventing the bubble curtain generating tubes (1) from rotating are installed on both sides of the two groups of bubble curtain generating tubes (1).

4. An underwater bubble curtain generating device according to claim 3, characterized in that: The position-limiting fixing member (9) comprises four groups of fixing rings (91), and the four groups of fixing rings (91) are respectively arranged on both sides of the two groups of bubble curtain generating tubes (1). The two groups of fixing rings (91) located on the same side are connected by a connecting rod (93). The side wall of the fixing ring (91) is provided with a threaded hole for connecting a fixing bolt (92). The fixing ring (91) is fixed to the side wall of the bubble curtain generating tube (1) by tightening the fixing bolt (92).

5. An underwater bubble curtain generating device according to claim 2, characterized in that: The support frame (7) has a plurality of groups of fixing holes (6) evenly arranged on its surface along the length direction for connection with the fixing plate (3); the fixing plate (3) and the fixing holes (6) are fixed by screws; and the fixing position of the fixing plate (3) can be adjusted according to the position of the fixing holes (6).

6. An underwater bubble curtain generating device according to claim 2, characterized in that: The fixing plate (3) is provided with a slide groove in a direction perpendicular to the supporting frame (7), and the lower end of the bearing seat (5) is fixed to the slide groove by means of screws.

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