Underwater gas explosion positioning and sealing integrated cover

Abstract

The utility model discloses an underwater gas explosion positioning and sealing integrated cover, which belongs to the technical field of underwater liquid oxygen blasting rocks and comprises a main cover, a central pentahedral column is fixedly mounted in the center of the top of the main cover, and a telescopic component is mounted in the central pentahedral column. The top end of the telescopic assembly is in lap joint with four sets of buckles extending to the outside of the center pentahedral column from the four vertical faces of the center pentahedral column correspondingly, communicating grooves for the buckles to move are formed in the four vertical faces of the center pentahedral column correspondingly, and fixing pieces for providing rotary supporting for the bottom ends of the four sets of buckles are detachably installed on the top of the main cover. According to the underwater gas explosion fracturing device, the problems that in the prior art, during underwater gas explosion operation, a fracturing device is difficult to position and fix, meanwhile, the sealing effect of a gas explosion hole opening is poor, the fracturing device is not prone to being damaged, and the fracturing device is not prone to being damaged due to the fact that the gas explosion hole opening is not good in sealing effect are solved. And the gas explosion operation efficiency and the gas explosion effect are greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater liquid oxygen blasting rock, in particular to an underwater air explosion positioning and sealing integrated cover. Background Technique

[0002] Underwater blasting is an important part of engineering blasting. Underwater blasting is widely used in engineering construction fields such as port and wharf construction, shipyard construction, waterway dredging, water conservancy and hydropower, road and bridge, and underwater pipeline laying. When operating underwater liquid oxygen blasting rock, after the underwater air explosion cracker is loaded into the blast hole, due to the overall specific gravity of the cracker being much smaller than that of the water body, the cracker has a certain upward buoyancy in the blast hole. The deeper the underwater air explosion blast hole is and the longer the length of the cracker is, the greater the upward buoyancy will be, resulting in difficulty in positioning and effectively fixing the cracker during underwater liquid oxygen blasting operations. At the same time, the working principle of underwater liquid oxygen blasting is mainly that the gas expands rapidly instantaneously to do work, and the length of the hole plugging section at the hole mouth is generally short (usually 1 - 2 meters). When ignition and detonation occur, part of the high-pressure gas in the blast hole is extremely easy to leak from the hole mouth, causing the pressure in the hole to drop rapidly, seriously affecting the expansion and rock-breaking effect of the air explosion.

[0003] In the prior art, it is relatively difficult to position and fix the cracker during underwater air explosion operations, and at the same time, the sealing effect of the air explosion hole mouth is also relatively poor. There is a large room for improvement in the air explosion operation efficiency and air explosion effect. Therefore, those skilled in the art have provided an underwater air explosion positioning and sealing integrated cover to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to provide an underwater air explosion positioning and sealing integrated cover to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: an underwater air explosion positioning and sealing integrated cover, including a main cover. A central pentagonal column is fixedly installed at the center of the top of the main cover. A telescopic component is installed inside the central pentagonal column. The top of the telescopic component is lapped with four buckle components that respectively extend from four vertical surfaces of the central pentagonal column to the outside thereof. Communication grooves for the movement of the buckle components are opened on four of the vertical surfaces of the central pentagonal column.

[0006] A fixing part for providing rotational support for the bottom ends of the four buckle components is detachably installed on the top of the main cover. Internal threads are provided inside the top end of the central pentagonal column. A U-shaped opening is provided on the outer ring of the main cover near the side surface of the central pentagonal column without a communication groove.

[0007] Preferably: The telescopic component includes a movable plate that is slidably installed up and down inside the central pentagonal column. A spring is installed between the bottom of the movable plate and the main cover. The top of the movable plate is in contact with the surfaces of the four buckle components.

[0008] Preferably, a plurality of limiting rods arranged at equal circumferential intervals around the central axis are fixedly installed on the inner wall of the central pentagonal column, and the movable plate is slidably installed up and down on the plurality of limiting rods.

[0009] Preferably, the buckle includes a wedge-shaped fork whose bottom end is rotatably connected to the fixing member. A rod is installed on the wedge-shaped fork and passes through a set of communication grooves. The rod abuts against the surface of the movable plate.

[0010] Preferably, the fixing member includes three Y-shaped fixed shaft groups located between two wedge-shaped forks. Both ends of the Y-shaped fixed shaft group are rotatably connected to the wedge-shaped forks on both sides of it. On one side of two of the wedge-shaped forks away from the Y-shaped fixed shaft group, a rectangular fixed shaft group is rotatably connected. The Y-shaped fixed shaft group and the rectangular fixed shaft group are both fixedly installed on the top of the main cover.

[0011] Preferably, the Y-shaped fixed shaft group and the rectangular fixed shaft group are both detachably installed on the top of the main cover through small bolts. The wedge-shaped fork and the rod are welded. The bottom end of the central pentagonal column is welded to the main cover.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, the overall device can form a good airtightness with the wall of the blast hole, and the device also has a certain rigidity. During air explosion, it can cooperate with the plugging material to play a better sealing role for the hole opening. The assembly between each component is convenient, which is beneficial to actual production and operation. The underwater air explosion positioning and sealing integrated cover is connected to the external structure through internal threads, which is convenient to deliver it to the actual position where it needs to be used. A plurality of wedge-shaped forks and rods supported and reset by spring force, the tip of the wedge-shaped fork forms close contact and clamping with the rock wall of the blast hole respectively, which is convenient for positioning and fixing the fracturer. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0015] Figure 2 is a top view of the overall structure of the present utility model;

[0016] Figure 3 is a cross-sectional view of the overall structure of the present utility model.

[0017] In the figure: 1. Main cover; 2. Central pentagonal column; 3. Communication groove; 4. Internal thread; 5. U-shaped opening; 6. Movable plate; 7. Spring; 8. Limiting rod; 9. Wedge-shaped fork; 10. Rod; 11. Y-shaped fixed shaft group; 12. Rectangular fixed shaft group; 13. Small bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0019] Please refer to Figures 1 to 3 , in the embodiment of the present utility model, the underwater air explosion positioning and sealing integrated cover includes a main cover 1. A central pentagonal column 2 is fixedly installed at the center of the top of the main cover 1. A telescopic component is installed inside the central pentagonal column 2. The top of the telescopic component is lapped with four groups of buckle components that extend from the four vertical surfaces of the central pentagonal column 2 to the outside. Communication grooves 3 for the movement of the buckle components are provided on four of the vertical surfaces of the central pentagonal column 2. A fixing component for providing rotational support for the bottom ends of the four groups of buckle components is detachably installed on the top of the main cover 1. An internal thread 4 is provided inside the top end of the central pentagonal column 2. A U-shaped opening 5 is provided on the outer ring of the main cover 1 near the side of the central pentagonal column 2 without the communication groove 3.

[0020] The main cover 1 is a metal disc, preferably a metal with a low price such as steel. The main cover 1 is circular, with a diameter of 105 - 110 mm and a thickness of 5 - 10 mm. The main functions of the main cover 1 are, firstly, to serve as the main body of the integrated cover and install and fix other accessories; secondly, to form a good airtightness with the blast hole wall (generally slightly smaller than the blast hole diameter and larger than the diameter of the fracturer), and it also has a certain rigidity. During air explosion, it can cooperate with the plugging material to better seal the hole mouth. The size of the U-shaped opening 5 is 15 - 17 mm and is used to engage with the protruding cylinder on the upper part of the underwater fracturer.

[0021] The outer surface of the central pentagonal column 2 is a pentagonal metal column with equal side lengths. The outer diameter of the pentagonal column is 40 - 45 mm, and there is a circular hole inside. A telescopic component is provided in the circular hole. The internal thread 4 in the upper part of the circular hole is used for threaded connection with the push rod end of the upper connecting piece. The push rod is a slender rod and can be made of materials such as bamboo, PVC, and PE. The diameter of the rod should be smaller than the blast hole diameter, and the length can be connected in sections to meet the working depth requirements of pushing the fracturer during underwater air explosion. A metal screw is installed at one end of the push rod, and through the screw, it can be threadedly connected with the upper part of the circular hole of the central pentagonal column 2.

[0022] In one embodiment, the telescopic component includes a movable plate 6 slidably mounted up and down inside the central pentahedral column 2. A spring 7 is installed between the bottom of the movable plate 6 and the main cover 1. The top of the movable plate 6 abuts against the surfaces of four sets of buckle components, facilitating the downward pressing of the buckle components to drive the spring 7 to expand and contract. Further, a plurality of limiting rods 8 are fixedly installed on the inner wall of the central pentahedral column 2 and arranged at equal circumferential intervals around its central axis. The movable plate 6 is slidably mounted up and down on the plurality of limiting rods 8, facilitating the improvement of the stability of the up and down movement of the movable plate 6. Specifically, the buckle component includes a wedge-shaped fork 9 whose bottom end is rotatably connected to a fixing member. A rod 10 is installed on the wedge-shaped fork 9 and penetrates through a set of communication slots 3. The rod 10 abuts against the surface of the movable plate 6.

[0023] The spring 7 is circular, with a diameter of about 150 mm to 200 mm. The length of the spring 7 after compression is 150 to 200 mm, and the length after extension is 400 to 500 mm, having a certain tensile force. The wedge-shaped fork 9 is a wedge-shaped metal part, with a width of 150 to 200 mm and a length of 250 to 300 mm, having a certain stiffness. The end of the wedge-shaped fork 9 is sharp, and the bottom of the wedge-shaped fork 9 is cylindrical. The wedge-shaped fork 9 can freely rotate a certain angle around the fixing member. A nearly L-shaped rod 10 is welded to the middle of each wedge-shaped fork 9. The rod 10 is an L-shaped metal part. The shorter end of the L-shaped rod 10 is integrally connected to the middle of the wedge-shaped fork 9. After the longer end passes through the strip-shaped hole of the central pentahedral column 2, it is placed above the central spring 7 and the movable plate 6. Under the telescopic linkage of the central spring 7 and the movable plate 6, the L-shaped rod 10 moves up and down accordingly, thereby driving the wedge-shaped fork 9 to tilt and open outward or to close and erect inward.

[0024] Correspondingly, the fixing member includes three Y-shaped fixed shaft groups 11 located between two adjacent wedge-shaped forks 9. Both ends of the Y-shaped fixed shaft group 11 are rotatably connected to the wedge-shaped forks 9 on both sides thereof. On the side of two of the wedge-shaped forks 9 away from the Y-shaped fixed shaft group 11, a rectangular fixed shaft group 12 is rotatably connected. Both the Y-shaped fixed shaft group 11 and the rectangular fixed shaft group 12 are fixedly installed on the top of the main cover 1 to ensure that the wedge-shaped fork 9 can rotate but cannot be displaced. Among them, both the Y-shaped fixed shaft group 11 and the rectangular fixed shaft group 12 are detachably installed on the top of the main cover 1 through small bolts 13. The said wedge-shaped fork 9 is welded to the rod 10, and the bottom end of the central pentahedral column 2 is welded to the main cover 1. The assembly and disassembly of each component are relatively convenient.

[0025] Working principle and usage method:

[0026] First step: During underwater liquid oxygen gas explosion operation, the protruding pipe column at the top of the cracker is clamped in the U-shaped opening 5 of the positioning and sealing integrated cover, and then the cracker is bonded to the integrated cover with quick gel.

[0027] Second step: The assembled cracker is sent into the underwater blast hole through a sleeve.

[0028] Step 3: Connect the screw at the end of the push rod to the internal thread 4 at the top of the five-sided column 2 in the center of the integrated cover. By manually rotating the push rod, the screw rotates downward to press down the four gear rods 10. The gear rods 10 move downward to compress the center spring 7, and the other end of the gear rods 10 drives the wedge-shaped gear fork 9 to be retracted in linkage.

[0029] Step 4: After the fracturing device is pushed to the designed depth of the underwater blasthole by the pushing rod, the pushing rod end bolt is gradually disconnected from the internal thread on the central five-sided column 2 of the integrated cover by rotating the pushing rod in the opposite direction, and the pressure above the stopper rod 10 is gradually released. Under the tension of the central spring 7, the stopper rod 10 rises, and the four wedge-shaped stopper forks 9 are linked to expand outward, so that the tips of the wedge-shaped stopper forks 9 are respectively in close contact and clamped with the rock wall of the blasthole.

[0030] Step 5: Retract the push rod. Since the specific gravity of the fracturing device in the hole is less than that of the water body, the fracturing device has a certain upward buoyancy. Under the action of buoyancy, the fork clamp between the tip of the wedge-shaped fork 9 and the rock wall of the blasthole becomes more and more firm, and finally the fork is stuck in place, which plays a better role in positioning the fracturing device.

[0031] Step 6: Use medium sand and gravel to complete the underwater hole plugging and further seal the hole.

[0032] Step 7: The gas explosion filling operation is completed. When detonated, the blast hole fracturing device generates a large amount of gas, produces a high temperature, and instantly forms a high pressure in the hole. Since the integrated cover steel plate has a certain sealing effect on the blast hole, under the combined sealing effect of the blockage, the leakage of the pressure in the blast hole is greatly reduced, which makes the pressure in the blast hole effectively act on the surrounding rocks, causing the rocks to crack and move.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An underwater gas explosion positioning and sealing integrated cover, comprising a main cover (1), characterized in that: A central five-sided column (2) is fixedly mounted at the top center of the main cover (1), a telescopic assembly is mounted inside the central five-sided column (2), and four groups of clips are overlapped at the top of the telescopic assembly, extending from four vertical surfaces of the central five-sided column (2) to the outside thereof, and four vertical surfaces of the central five-sided column (2) are provided with connecting grooves (3) for the clips to move; The top of the main cover (1) is detachably provided with a fixing member that provides rotational support for the bottom ends of the four groups of snap-fit ​​parts, the top of the central five-sided column (2) is internally provided with an internal thread (4), and the outer ring of the main cover (1) is provided with a U-shaped opening (5) close to the side of the central five-sided column (2) without the connecting groove (3).

2. The underwater gas explosion positioning and sealing integrated cover according to claim 1, characterized in that: The telescopic assembly comprises a movable plate (6) which is slidably mounted inside the central five-sided column (2) up and down, a spring (7) is installed between the bottom of the movable plate (6) and the main cover (1), and the top of the movable plate (6) is in contact with the surfaces of the four groups of snap fasteners.

3. The underwater gas explosion positioning and sealing integrated cover according to claim 2 is characterized in that: The inner wall of the central five-sided column (2) is fixedly mounted with a plurality of groups of limit rods (8) which are arranged equidistantly in a circle around the central axis, and the movable plate (6) is slidably mounted on the plurality of groups of limit rods (8) up and down.

4. The underwater gas explosion positioning and sealing integrated cover according to claim 3 is characterized in that: The buckle comprises a wedge-shaped fork (9) whose bottom end is rotatably connected to the fixing member, and a shift rod (10) penetrating a group of connecting grooves (3) is mounted on the wedge-shaped fork (9), and the shift rod (10) abuts against the surface of the movable plate (6).

5. The underwater gas explosion positioning and sealing integrated cover according to claim 4 is characterized in that: The fixing member comprises three groups of Y-shaped fixed shaft groups (11) located between two pairs of wedge-shaped forks (9), both ends of the Y-shaped fixed shaft groups (11) are rotatably connected to the wedge-shaped forks (9) on both sides thereof, wherein the two groups of wedge-shaped forks (9) are rotatably connected to a rectangular fixed shaft group (12) on one side away from the Y-shaped fixed shaft group (11), and both the Y-shaped fixed shaft group (11) and the rectangular fixed shaft group (12) are fixedly mounted on the top of the main cover (1).

6. The underwater gas explosion positioning and sealing integrated cover according to claim 5, characterized in that: The Y-shaped fixed shaft group (11) and the rectangular fixed shaft group (12) are both detachably mounted on the top of the main cover (1) by means of small bolts (13); the wedge-shaped shift fork (9) is welded to the shift rod (10); and the bottom end of the central five-sided column (2) is welded to the main cover (1).

Images