Air shield dam air supply pipeline connecting structure

Abstract

This utility model relates to the technical field of water conservancy and hydropower facilities, and discloses a connection structure for an air supply pipeline of an air shield dam. It includes a base plate, a fastening bolt installed in the middle of the base plate, and a lower airbag and an upper airbag sequentially installed from bottom to top around the outer periphery of the fastening bolt. A shield plate is installed on the top of the base plate. A connecting air supply device is installed between the upper and lower airbags, and a bottom air supply device is installed at the bottom of the lower airbag. A hose assembly is installed at the other end of the bottom air supply device. The connecting air supply device includes a pressure plate that passes through the upper and lower airbags sequentially from bottom to top. An air nozzle is threadedly connected to the outer periphery of the pressure plate. In this utility model, the internal cavities of the upper and lower airbags are connected through the air nozzle and the pressure plate. Therefore, during the inflation of the lower airbag, airflow can enter the upper airbag through the pressure plate, allowing for simultaneous inflation and deflation / contraction.

Description

Technical Field

[0001] This utility model relates to the field of water conservancy and hydropower facilities technology, and in particular to a connection structure for the air supply pipeline of an air shield dam. Background Technology

[0002] The air-shield dam absorbs the essence of traditional movable dams while eliminating their shortcomings. It not only has the advantages of simple structure, short construction and installation cycle, outstanding flood control and flood season crossing capacity, safe and reliable operation, and continuous controllability of water passage height and operating status, but also has stronger cleaning and silt removal capabilities, water blocking and passage capacity, short filling and drainage time, simple operation and management, ultra-long service life, high comprehensive benefits, strong earthquake resistance, high adaptability to foundations, and excellent landscape effect.

[0003] According to the "Design Specification for Pneumatic Shield Gate System" and comparisons with actual engineering cases, when the water-retaining height of the pneumatic shield dam is greater than 4m, double-layer airbag support should be used to minimize the internal air pressure of the airbags and ensure the safety redundancy of the airbags. For shield plates with high water-retaining height, double airbags stacked one on top of the other are used for support. The current mainstream design of the double airbag supply and exhaust pipeline in China is as follows: the lower airbag is connected to the inflation and deflation system through a bottom air nozzle, and the upper airbag has an air nozzle on the upstream side of the airbag anchoring end, connected to a separate inflation and deflation pipeline set up on the water-facing side. That is, two airbags and two sets of pipelines, with the upper and lower airbags independently anchored.

[0004] However, the above structure causes the upper and lower airbags to shift relative to each other during inflation and deflation due to the deviation of the rotation axis and the asynchronous inflation and deformation of the airbags. Because the airbags are subjected to extremely high pressure, the relative displacement produces a loud noise and a large tearing force on the outer layer of the rubber. Over time, this will damage the airbag walls at the contact points between the two airbags, thereby shortening the service life of the airbags. To address this problem, an air shield dam air supply pipeline connection structure is proposed. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a connection structure for the air supply pipeline of an air shield dam, which aims to improve the problem in the prior art that the airbag is prone to tearing force due to asynchronous inflation during the inflation process, which affects its service life.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A gas supply pipeline connection structure for an air shield dam includes a base plate, a fastening bolt installed in the middle of the base plate, a lower airbag and an upper airbag installed sequentially from bottom to top on the outer periphery of the fastening bolt, a shield plate installed on the top of the base plate, a connecting gas supply device installed between the upper airbag and the lower airbag, a bottom gas supply device installed at the bottom of the lower airbag, and a hose assembly installed at the other end of the bottom gas supply device.

[0008] The connecting gas transmission device includes a pressure plate, which passes through the upper air bladder and the lower air bladder from bottom to top, and the outer circumference of the pressure plate is threaded with an air nozzle.

[0009] As a further description of the above technical solution:

[0010] The bottom air supply device includes a second air nozzle, which is slidably connected to the middle of the lower wall of the lower airbag, and a second pressure plate is threadedly connected to the outer periphery of the second air nozzle.

[0011] As a further description of the above technical solution:

[0012] The hose assembly includes two connecting nuts, one of which is threaded to the outer periphery of the second air nozzle, and a composite hose is rotatably connected to the middle of the connecting nut, and the other end of the composite hose is rotatably connected to the other connecting nut.

[0013] As a further description of the above technical solution:

[0014] One of the connecting nuts has a gas supply pipe threaded into its center;

[0015] As a further description of the above technical solution:

[0016] A safety restraint band is installed in the middle of the fastening bolt, and the other end of the safety restraint band is connected to the shield plate;

[0017] As a further description of the above technical solution:

[0018] The upper airbag and the lower airbag are in contact with the shield plate and the base plate, respectively.

[0019] This utility model has the following beneficial effects:

[0020] 1. In this utility model, the internal cavities of the upper and lower airbags are first connected by the air nozzle and the pressure plate, so that during the inflation of the lower airbag, the airflow can enter the upper airbag through the pressure plate, thus allowing for simultaneous inflation and deflation or deflation and contraction. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a gas supply pipeline connection structure for an air shield dam proposed in this utility model.

[0022] Figure 2 This is a schematic diagram of the pressure plate of the air supply pipeline connection structure of the air shield dam proposed in this utility model;

[0023] Figure 3 This is a schematic diagram of the air nozzle of the air supply pipeline connection structure for an air shield dam proposed in this utility model;

[0024] Figure 4 This is a schematic diagram of the pressure plate 2 of the air supply pipeline connection structure of the air shield dam proposed in this utility model;

[0025] Figure 5 This is a schematic diagram of the air nozzle 2 of the air supply pipeline connection structure for an air shield dam proposed in this utility model;

[0026] Figure 6 This is a schematic diagram of the composite flexible hose for connecting the air supply pipeline of an air shield dam, as proposed in this utility model.

[0027] Legend:

[0028] 1. Connecting gas delivery device; 101. Gas nozzle one; 102. Pressure plate one; 2. Bottom gas delivery device; 201. Pressure plate two; 202. Gas nozzle two; 3. Hose assembly; 301. Connecting nut; 302. Composite hose; 4. Upper airbag; 5. Lower airbag; 6. Fastening bolt; 7. Gas delivery pipeline; 8. Shield plate; 9. Base plate; 10. Safety restraint belt. Detailed Implementation

[0029] 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.

[0030] Reference Figures 1-3An embodiment of this utility model provides: a gas supply pipeline connection structure for an air shield dam, including a base plate 9, a fastening bolt 6 installed in the middle of the base plate 9, a lower airbag 5 and an upper airbag 4 installed sequentially from bottom to top on the outer periphery of the fastening bolt 6, a shield plate 8 installed on the top of the base plate 9, the upper airbag 4 and the lower airbag 5 respectively contacting the shield plate 8 and the base plate 9, a connecting gas supply device 1 installed between the upper airbag 4 and the lower airbag 5, a bottom gas supply device 2 installed at the bottom of the lower airbag 5, a hose assembly 3 installed at the other end of the bottom gas supply device 2, the connecting gas supply device 1 including a pressure plate 102, the pressure plate 102 passing through the upper airbag 4 and the lower airbag 5 sequentially from bottom to top, and an air nozzle 101 threadedly connected to the outer periphery of the pressure plate 102. Firstly, the pressure plate 102 penetrates the side where the upper airbag 4 and lower airbag 5 fit together, allowing the protrusion of the pressure plate 102 to clamp the upper airbag 4 and lower airbag 5 together with the air nozzle 101, thus forming an airflow channel. This connects the internal cavities of the upper airbag 4 and lower airbag 5 into a whole, allowing the high-pressure gas entering the lower airbag 5 to enter the upper airbag 4. During exhaust, the high-pressure gas in the upper airbag 4 can also be discharged into the lower airbag 5 and then discharged through the bottom air delivery device 2. Its simple structure not only improves the normal operation rate of the inflation and deflation pipeline, but also ensures that the upper airbag 4 and lower airbag 5 are anchored at the same position, so that their rotation axes are the same when they inflate and collapse. The relative displacement of the upper airbag 4 and lower airbag 5 during inflation and collapse is minimal, and no large tensile stress is generated between them, thus avoiding damage to the contact parts of the upper airbag 4 and lower airbag 5 and improving their service life.

[0031] Reference Figure 4 and Figure 5 The bottom air supply device 2 includes a second air nozzle 202, which is slidably connected to the middle of the lower wall of the lower airbag 5. A pressure plate 201 is threadedly connected to the outer periphery of the second air nozzle 202. The pressure plate 201 enables the second air nozzle 202 to be installed at the bottom of the lower airbag 5, making the second air nozzle 202 the only channel for high-pressure gas to enter and exit, thereby ensuring the synchronous inflation of the upper airbag 4 and the lower airbag 5.

[0032] Reference Figure 1 and Figure 6 The hose assembly 3 includes two connecting nuts 301. One connecting nut 301 is threaded onto the outer periphery of the second air nozzle 202. A composite hose 302 is rotatably connected to the middle of the connecting nut 301, and the other end of the composite hose 302 is rotatably connected to the other connecting nut 301. A gas delivery pipe 7 is threaded onto the middle of one of the connecting nuts 301. The composite hose 302, made of rubber and metal mesh, can maintain its flexibility under high-pressure conditions, thereby improving the service life of the composite hose 302 under high-pressure gas impact. This allows high-pressure gas generated by an external air compressor to be smoothly delivered into the lower air chamber 5 through the connection of the gas delivery pipe 7 via the hose assembly 3.

[0033] Reference Figure 1 A safety restraint band 10 is installed in the middle of the fastening bolt 6, and the other end of the safety restraint band 10 is connected to the shield plate 8. The safety restraint band 10 can limit the maximum deployment angle of the shield plate 8, prevent the shield plate 8 from being displaced due to force rebound, and ensure stability.

[0034] Working principle: First, the upper airbag 4 and lower airbag 5 are stacked and anchored in the same position by fastening bolts 6. High-pressure gas input from the air compressor first enters the composite hose 302 through the air supply pipe 7, and then enters the lower airbag 5 through the second air nozzle 202. At the same time, the airflow enters the upper airbag 4 through the first pressure plate 102, thus achieving the simultaneous inflation of the upper airbag 4 and lower airbag 5. When dam collapse is required, the high-pressure gas flows in the opposite direction and is finally discharged through the external exhaust valve, thereby extending the service life of the upper airbag 4 and lower airbag 5.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas supply pipeline connection structure for a gas shield dam, comprising a base plate (9), characterized in that: A fastening bolt (6) is installed in the middle of the base plate (9). A lower airbag (5) and an upper airbag (4) are installed on the outer periphery of the fastening bolt (6) from bottom to top. A shield plate (8) is installed on the top of the base plate (9). A connecting air supply device (1) is installed between the upper airbag (4) and the lower airbag (5). A bottom air supply device (2) is installed at the bottom of the lower airbag (5). A hose assembly (3) is installed at the other end of the bottom air supply device (2). The gas transmission device (1) includes a pressure plate (102), which passes through the upper air bag (4) and the lower air bag (5) from bottom to top. The outer periphery of the pressure plate (102) is threaded with an air nozzle (101).

2. The air supply pipeline connection structure for a gas shield dam according to claim 1, characterized in that: The bottom air supply device (2) includes a second air nozzle (202), which is slidably connected to the middle of the lower wall of the lower air bag (5), and the outer periphery of the second air nozzle (202) is threadedly connected to a second pressure plate (201).

3. The air supply pipeline connection structure for a gas shield dam according to claim 2, characterized in that: The hose assembly (3) includes two connecting nuts (301), one of which is threaded to the outer periphery of the second air nozzle (202), and the middle of the connecting nut (301) is rotatably connected to the composite hose (302), and the other end of the composite hose (302) is rotatably connected to the other connecting nut (301).

4. The air supply pipeline connection structure for a gas shield dam according to claim 3, characterized in that: One of the connecting nuts (301) has a gas supply pipe (7) threaded in the middle.

5. The air supply pipeline connection structure for a gas shield dam according to claim 1, characterized in that: A safety restraint band (10) is installed in the middle of the fastening bolt (6), and the other end of the safety restraint band (10) is connected to the shield plate (8).

6. The air supply pipeline connection structure for a gas shield dam according to claim 1, characterized in that: The upper airbag (4) and the lower airbag (5) are in contact with the shield plate (8) and the bottom plate (9), respectively.

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