Underwater blasting shock wave weakening device

Abstract

The utility model relates to the technical field of underwater blasting, and discloses an underwater blasting shock wave weakening device which comprises two bubble generating pipes which are symmetrically arranged, a plurality of bubble holes are formed in the bubble generating pipes in the length direction of the bubble generating pipes, and bases are arranged at the bottoms of the two bubble generating pipes. Supporting rods are connected to the two ends of the sides, close to the bubble generating pipe, of the two bases, a splicing assembly is connected to one ends of the two bases, a splicing shaft is fixedly connected to the inner sides of the ends, away from the splicing assembly, of the two bases, and the splicing shaft and the splicing assembly are arranged in a matched mode. According to the underwater blasting shock wave weakening device, by arranging the splicing shafts and the splicing assemblies, when the two groups of mutually spliced bubble generating pipes can settle to uneven water bottoms with pits, stones and the like, the splicing positions can be overturned to a certain degree through the splicing shafts, so that the end part of the weakening device is prevented from tilting; and the uniformity of bubble generation is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater blasting, in particular to an underwater blasting shock wave weakening device. Background Art

[0002] Underwater blasting refers to blasting operations carried out in water, on the bottom of water or in temporary media. Commonly used methods include exposed blasting, drilling blasting and chamber blasting.

[0003] Since the blasting shock will damage the organisms and buildings in the water during underwater blasting, it is necessary to install a weakening device to weaken the blasting shock wave during blasting. At present, bubble curtains are widely used in underwater blasting projects as an effective method to reduce underwater shock waves. The working principle of the bubble curtain is to reduce the peak pressure of the underwater shock wave by setting up a bubble curtain generated in the blasting area and the protected area. Specifically, the high-pressure airflow is continuously ejected through a guide steel pipe covered with small holes to form a rising and dense curtain-like bubble in the water, thereby forming an underwater bubble wall. When the underwater shock wave passes through this bubble curtain wall, due to the compressible nature of the gas, the kinetic energy of the shock wave crest is converted into the internal energy of the compressed bubble. After the shock wave crest passes, the internal energy stored in the compressed bubble is gradually released during the expansion of the bubble, thereby achieving effective control and attenuation of the underwater shock wave, playing an important protective role.

[0004] For example, the patent with announcement number CN218916112U announces an underwater blasting shock wave weakening device, including a base, two steel pipes are fixedly connected to the top of the base, and the outer wall of the steel pipe is penetrated with a plurality of air outlets along its length direction, and the left and right ends of the base are respectively fixedly connected with a first connecting plate and a second connecting plate, and the top of the first connecting plate is penetrated with a positioning hole; by arranging the first connecting plate, the positioning hole, the arc groove, the second connecting plate, the first screw, the second screw, and the nut lamp, the two adjacent devices can be locked and fixed at a desired angle, and the bottom end of the steel pipe of the device on one side will be located directly below the top end of the steel pipe of the device on the other side, that is, there is an intersection in the top view projection of the steel pipes of the two devices, so that the bubble curtains generated by the two devices can overlap each other, thereby avoiding gaps in the bubble curtains to ensure the weakening effect of the device on underwater shock waves.

[0005] However, the protective device in the above technology still has the following problems:

[0006] Although the bubble curtains generated between two devices are overlapped with each other to ensure the weakening effect of the devices on the underwater blasting shock wave, when the bubble tube sinks to the bottom, there may be stones, potholes, etc. at the bottom, resulting in the sunken bubble tube being unable to maintain its original shape, which may cause the bubble tube to tilt, with different heights at both ends, making the bubbles emerging from the connection of the two bubble tubes uneven, or the bubble holes tilting to one side, resulting in the bubbles being unable to rise evenly when emerging, so that the formed bubble curtain is not uniform, affecting the weakening effect on the shock wave. Summary of the Utility Model

[0007] Aiming at the deficiencies of the prior art, the present utility model provides an underwater blasting shock wave weakening device, such as: it can ensure that the bubble holes of the installed bubble generating tubes are vertically upward, making the formed bubble curtain more uniform and improving the weakening effect on the shock wave.

[0008] To achieve the above object, the present utility model provides the following technical solution: An underwater blasting shock wave weakening device includes two symmetrically arranged bubble generating tubes. The bubble generating tubes are provided with a plurality of bubble holes along their length directions. The bottoms of the two bubble generating tubes are both provided with bases. At both ends of one side of the two bases close to the bubble generating tubes, support rods are fixedly connected. Through holes are respectively formed in the side walls of the four support rods away from the bases. Installation components are connected to both ends of the two bubble generating tubes. The four installation components are respectively connected to the corresponding through holes. A plurality of fixed crossbars are fixedly connected between the two bases. One end of the two bases is connected with a splicing component. A splicing shaft is fixedly connected to the inner side of the other end of the two bases away from the splicing component. The splicing shaft is matched with the splicing component.

[0009] Further, the splicing component includes a splicing seat and a fixing plate. At both ends of one side of the splicing seat, they are respectively fixedly connected to one end of the two bases. An installation groove parallel to the splicing shaft is formed on the upper surface of the splicing seat. The installation groove is matched with the splicing shaft. The fixing plate is located above the installation groove and is detachably connected to the splicing seat through a plurality of bolts.

[0010] Further, the installation component includes a fixing block and an insertion rod. The fixing block is fixedly connected to and communicates with one end of the bubble generating tube. The side of the fixing block away from the bubble generating tube is fixedly connected to and communicates with the insertion rod. The end of the insertion rod away from the fixing block passes through the through hole and is connected with a communication component.

[0011] Further, the communication component includes a threaded rod, a connection cap and an externally threaded tube. A threaded hole is formed in the side of the insertion rod away from the fixing block. The threaded rod is threadedly connected to the threaded hole. The end of the threaded rod away from the insertion rod is fixedly connected to and communicates with the connection cap. The end of the connection cap away from the threaded rod is fixedly connected to and communicates with the externally threaded tube. The inner hole of the externally threaded tube passes through the connection cap, the threaded rod, the insertion rod and the fixing block and communicates with the bubble generating tube.

[0012] Further, the length of the insertion rod is not greater than the depth of the connection hole, the length of the threaded rod is less than the depth of the threaded hole, and both sides of the support rod are abutted against the fixed block and the connection cap respectively.

[0013] Further, counterweight blocks are fixedly connected to both ends of the bubble generating tube on the side far away from a plurality of bubble holes.

[0014] Further, the two bases are arranged in an eight-character shape, and the splicing shaft is located inside the direction of the larger opening.

[0015] Compared with the prior art, the present utility model has the following beneficial effects:

[0016] For this underwater blasting shock wave attenuation device, by setting the splicing shaft and the splicing assembly, when the two mutually spliced bubble generating tubes sink to an uneven underwater bottom with pits, stones, etc., they can be flipped to a certain extent at the splicing position through the splicing shaft, so as to avoid the end of the attenuation device from tilting up, affecting the uniformity of bubble generation, and ensuring that there is no bubble gap at the splicing position after flipping, and ensuring the continuity of the bubble curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall external connection structure of the present utility model;

[0018] Figure 2 is based on Figure 1 explosion schematic diagram of the connection structure;

[0019] Figure 3 is based on Figure 1 explosion schematic diagram of the connection structure at one end thereof;

[0020] Figure 4 is an explosion schematic diagram of the connection structure of the installation component of the present utility model;

[0021] Figure 5 is a partial sectional schematic diagram of the connection structure of the installation component of the present utility model;

[0022] Figure 6 is a schematic diagram of the splicing structure of two sets of devices of the present utility model.

[0023] In the figure: 1, bubble generating tube; 2, base; 3, support rod; 4, fixed cross bar; 5, splicing shaft; 6, splicing seat; 7, fixing plate; 8, fixed block; 9, insertion rod; 10, threaded rod; 11, connection cap; 12, counterweight block; 13, external threaded tube; 101, bubble hole; 301, connection hole; 601, installation groove; 901, threaded hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0025] Please refer to Figure 1 - Figure 5 , an underwater blasting shock wave weakening device, which includes two symmetrically arranged bubble generating tubes 1. The bubble generating tubes 1 are provided with a plurality of bubble holes 101 along their length directions. The bottoms of the two bubble generating tubes 1 are both provided with bases 2. Both ends of the two bases 2 close to one side of the bubble generating tubes 1 are fixedly connected with support rods 3. Connecting holes 301 are respectively formed through the side walls of the four support rods 3 away from one end of the bases 2. Both ends of the two bubble generating tubes 1 are connected with installation components, and the four installation components are respectively connected with the corresponding connecting holes 301. A plurality of fixed cross bars 4 are fixedly connected between the two bases 2. One end of the two bases 2 is connected with a splicing component, and a splicing shaft 5 is fixedly connected to the inner side of the two bases 2 away from the splicing component end. The splicing shaft 5 is matched with the splicing component.

[0026] As Figure 1 - Figure 5 shown, an underwater blasting shock wave weakening device in the present utility model is similar in structure to the existing underwater blasting shock wave weakening devices. For example, an underwater blasting shock wave weakening device disclosed in the patent with the publication number of CN218916112U. The main improvement point of the present utility model is to make the generated bubble curtain more uniform and improve the weakening effect on the shock wave. As Figures 1 to 5 shown, when the underwater blasting shock wave weakening device in the present utility model is in use, the two bubble generating tubes 1 are respectively installed on the support rods 3 at both ends of the two bases 2 to form a section of weakening device. Subsequently, the splicing shaft 5 at the end of the two bases 2 is connected with the splicing component at the end of other weakening devices. By connecting end to end, a series of weakening devices are formed. When the weakening device is installed on the bottom of the water, in an uneven bottom of the water, between two connected weakening devices, the splicing shaft 5 can be flipped in the splicing component, so as to fit on the bottom of the water, avoid the base 2 of the weakening device from tilting up and being driven to shift by the underwater undercurrent, improve the stability of the weakening device installed on the bottom of the water, improve the stability of the formation of the bubble curtain, and improve the weakening effect on the shock wave.

[0027] As Figure 1 - Figure 5As shown, the splicing component includes a splicing base 6 and a fixing plate 7. The two ends of one side of the splicing base 6 are respectively fixedly connected to one end of the two bases 2. An installation groove 601 parallel to the splicing shaft 5 is formed on the upper surface of the splicing base 6. The installation groove 601 is arranged to match the splicing shaft 5. The fixing plate 7 is located above the installation groove 601 and is detachably connected to the splicing base 6 through a plurality of bolts. When splicing two weakening devices, the fixing plate 7 of one weakening device is detached from the splicing base 6. Then, the splicing shaft 5 of the other weakening device is installed in the installation groove 601 of the splicing base 6. Subsequently, the detached fixing plate 7 is reinstalled onto the splicing base 6, so as to seal the splicing shaft 5 in the installation groove 601, completing the installation connection between the two weakening devices. At the same time, the splicing shaft 5 can rotate in the installation groove 601, enabling the two weakening devices to change the angle according to the underwater terrain.

[0028] As Figure 1 - Figure 5 As shown, the installation component includes a fixing block 8 and a plug rod 9. The fixing block 8 is fixedly connected and communicated with one end of the air bubble generating pipe 1. The side of the fixing block 8 away from the air bubble generating pipe 1 is fixedly connected and communicated with the plug rod 9. The end of the plug rod 9 away from the fixing block 8 passes through the connection hole 301 and is connected with a communicating component. When installing the air bubble generating pipe 1 on the base 2, the plug rod 9 fixed to the end of the air bubble generating pipe 1 is inserted into the connection hole 301 of the support rod 3, thus completing the installation connection between the air bubble generating pipe 1 and the base 2. Subsequently, by using the connection between the communicating component and the plug rod 9, the connection between the air bubble generating pipe 1 and the support rod 3 will not fall off. At the same time, through the communicating component, two adjacent air bubble generating pipes 1 can also be communicated with each other, facilitating the connection with the air compressor on the water surface for air conduction.

[0029] As Figure 1 - Figure 4As shown in the figure, the connecting component includes a threaded rod 10, a connecting cap 11 and an external threaded pipe 13. A threaded hole 901 is formed through one side of the inserting rod 9 away from the fixed block 8. The threaded rod 10 is threadedly connected to the threaded hole 901. One end of the threaded rod 10 away from the inserting rod 9 is fixedly connected and communicated with the connecting cap 11. One end of the connecting cap 11 away from the threaded rod 10 is fixedly connected and communicated with the external threaded pipe 13. The inner hole of the external threaded pipe 13 passes through the connecting cap 11, the threaded rod 10, the inserting rod 9 and the fixed block 8 and is communicated with the bubble generating pipe 1. When using the connecting component to connect with the inserting rod 9, by rotating the connecting cap 11, the threaded rod 10 is driven to rotate and screwed into the threaded hole 901 of the inserting rod 9, so as to install the bubble generating pipe 1 on the support rod 3. The diameter of the connecting cap 11 needs to be greater than the diameter of the connecting hole 301 on the support rod 3. Cooperating with the fixed block 8 and the inserting rod 9, the bubble generating pipe 1 is installed on the support rod 3. After the installation of the bubble generating pipe 1 is completed, a hose with threaded joints at both ends can be used to connect the ends of multiple spliced bubble generating pipes 1 end to end, so as to connect multiple bubble generating pipes 1 to each other and communicate with an air compressor or other inflating device on the water surface at one end to conduct air.

[0030] As Figure 1 - Figure 5 shown in the figure, the length of the inserting rod 9 is not greater than the depth of the connecting hole 301, the length of the threaded rod 10 is less than the depth of the threaded hole 901, and both sides of the support rod 3 are respectively abutted against the fixed block 8 and the connecting cap 11. When the two bases 2 are installed at the bottom of the water and the bottom of the water tilts to one side, causing the two bases 2 to tilt to one side. At this time, according to the tilt angle, the threaded rod 10 can be unscrewed from the threaded hole 901 through the connecting cap 11, and then the inserting rod 9 is rotated in the connecting hole 301 to adjust the bubble holes 101 of the bubble generating pipe 1 upward. Then, the connecting cap 11 is rotated again to drive the threaded rod 10 to be screwed into the threaded hole 901 of the inserting rod 9, and the connecting cap 11 is abutted against the side surface of the support rod 3, cooperating with the other side of the support rod 3 abutted against the fixed block 8, so as to fix the position of the bubble generating pipe 1, making the bubble holes 101 always face upward, so that the subsequent generated bubble curtain is more uniform and stable.

[0031] As Figure 1 - Figure 5 shown in the figure, counterweight blocks 12 are fixedly connected to both ends of the bubble generating pipe 1 on the side away from a plurality of bubble holes 101. By adding two counterweight blocks 12 on the back side of the bubble holes 101, when adjusting the bubble holes 101 upward at the bottom of the water, the counterweight blocks 12 are used to make the bubble holes 101 adjust upward more quickly and accurately, avoiding the situation that the up and down directions cannot be judged at the bottom of the water and cannot be adjusted.

[0032] As Figure 1 - Figure 5As shown, the two bases 2 are arranged in a V shape, and the splicing shaft 5 is located inside the larger opening direction. The two bases 2 are fixed in a V shape, so that when the two sections of the weakening device are spliced together, there is a certain amount of overlap in the positions of the bubble holes 101. When the two spliced sections of the weakening device have a certain flipping angle at the bottom of the water, the bubble curtain will not be interrupted, ensuring the continuity of the bubble curtain.

[0033] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. An underwater blasting shock wave attenuation device, comprising two symmetrically arranged bubble generating tubes (1), and a plurality of bubble holes (101) are arranged along the length direction of the bubble generating tube (1), and it is characterized in that: The bottoms of the two bubble generating tubes (1) are each provided with a base (2). At both ends of one side of the two bases (2) close to the bubble generating tubes (1), support rods (3) are fixedly connected. Through holes (301) are formed in the side walls of the four support rods (3) at the ends away from the bases (2). Installation components are connected to both ends of the two bubble generating tubes (1), and the four installation components are respectively connected to the corresponding through holes (301). A number of fixed crossbars (4) are fixedly connected between the two bases (2). One end of the two bases (2) is connected with a splicing component, and a splicing shaft (5) is fixedly connected to the inner side of the two bases (2) at the end away from the splicing component. The splicing shaft (5) is arranged to match the splicing component.

2. The underwater blasting shock wave attenuation device according to claim 1, wherein: The splicing component includes a splicing base (6) and a fixing plate (7). At both ends of one side of the splicing base (6), they are respectively fixedly connected to one end of the two bases (2). An installation groove (601) parallel to the splicing shaft (5) is formed in the upper surface of the splicing base (6), and the installation groove (601) is arranged to match the splicing shaft (5). The fixing plate (7) is located above the installation groove (601) and is detachably connected to the splicing base (6) by a plurality of bolts.

3. An underwater blasting shock wave attenuation device according to claim 1 or 2, characterized in that: The installation component includes a fixing block (8) and a plug rod (9). The fixing block (8) is fixedly connected to and communicates with one end of the bubble generating tube (1). On the side of the fixing block (8) away from the bubble generating tube (1), the plug rod (9) is fixedly connected to and communicates with it. The end of the plug rod (9) away from the fixing block (8) passes through the through hole (301) and is connected with a communicating component.

4. The underwater blasting shock wave attenuation device according to claim 3, wherein: The communicating component includes a threaded rod (10), a connecting cap (11) and an externally threaded tube (13). A threaded hole (901) is formed in the side of the plug rod (9) away from the fixing block (8). The threaded rod (10) is threadedly connected to the threaded hole (901). The end of the threaded rod (10) away from the plug rod (9) is fixedly connected to and communicates with the connecting cap (11). The end of the connecting cap (11) away from the threaded rod (10) is fixedly connected to and communicates with the externally threaded tube (13). The inner hole of the externally threaded tube (13) passes through the connecting cap (11), the threaded rod (10), the plug rod (9) and the fixing block (8) to communicate with the bubble generating tube (1).

5. An underwater blasting shock wave attenuation device according to claim 4, characterized in that: The length of the plug rod (9) is not greater than the depth of the through hole (301), the length of the threaded rod (10) is less than the depth of the threaded hole (901), and both sides of the support rod (3) are respectively abutted against the fixing block (8) and the connecting cap (11).

6. An underwater blasting shock wave attenuation device according to claim 1, 2, 4 or 5, characterized in that: Counterweight blocks (12) are fixedly connected to both ends of the bubble generating tube (1) on the side away from a number of bubble holes (101).

7. An underwater blasting shock wave attenuation device according to claim 1, 2, 4 or 5, characterized in that: The two bases (2) are arranged in a V-shaped layout, and the splicing shaft (5) is located inside the larger opening direction.

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