Explosive deepwater explosive power target and deepwater explosive power testing method

Abstract

The invention relates to an explosive deepwater explosion power target and a deepwater explosion power testing method, which are characterized in that a deepwater explosion environment is simulated in a pressurized environment of a pressure container; the thickness of the test target plate is adjusted through the plate thickness adjusting ring so as to adapt to explosion tests of explosives with different masses, and it is guaranteed that the test target plate can deform to a certain degree without being damaged; the pressurizing air pipe is used for conveying air into the target and pressurizing to ensure that the internal pressure of the target is the same, and then the hydrostatic pressure and the explosive underwater explosion load are decoupled to the structure response to obtain the dynamic response of the real explosive deep-water explosion load to the structure so as to evaluate the explosive deep-water explosion power.

Description

Technical Field

[0001] The invention relates to the technical field of blasting test, in particular to an explosive deep-water explosion power target and a deep-water explosion power test method. Background Art

[0002] The ideal way to evaluate the destructive power of deep-water explosions of explosives is to conduct relevant tests in actual deep-sea environments. However, actual deep-sea environment explosion tests have high requirements on sea conditions and other conditions, and the tests are difficult to implement and expensive.

[0003] Pressurized vessels can be used as ideal sites for simulating deep-sea environments in laboratories. By adjusting test conditions and laying out wall absorbing layers, the test scope of deep-water explosions can be effectively increased, and can be adapted to the power measurement of special charges with equivalent amounts of explosives.

[0004] At present, the deep-water explosion power test of explosives still mainly uses the output energy of explosives as its measurement indicator, which cannot reflect the effective utilization rate of energy and its destructive ability to deep-water targets.

[0005] If you want to test energy utilization and target destructive capability, the test and evaluation method widely used in shallow water, which uses the damage and dynamic response of underwater explosions to structures to characterize the destructive power of explosives, is not applicable in deep water. This is because when explosives explode in deep water, the explosion impact load and hydrostatic pressure are coupled with each other when acting on the structure, making it difficult to decouple and distinguish. Therefore, the results of the current deep-water explosion test of structures cannot characterize the destructive capability of the real charge on the target in deep-water explosions. Summary of the invention

[0006] In view of the shortcomings in the above-mentioned existing production technology, the applicant provides a rationally structured deep-water explosion power target of explosives and a deep-water explosion power testing method, which tests the explosion power of deep-water explosives by observing the degree of target destruction; during the test, the hydrostatic pressure and the underwater explosion impact load can be decoupled, thereby measuring the true and accurate explosion power.

[0007] The technical solution adopted by the present invention is as follows:

[0008] A deepwater explosion power target of explosives simulates a deepwater explosion environment under a pressurized environment in a pressure vessel, comprising a test target plate and a safety test space located on the side of the test target plate away from the explosion. A plurality of laser sensors are arranged in the safety test space, and the laser sensors are used to sense the degree of deformation of the test target plate.

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

[0010] The pressurized environment is a sealable pressure tank, and the air pressure in the tank can be relieved.

[0011] The target is a pre-assembled accessory. During the explosion test, the target and explosives are placed in a pressure tank.

[0012] An air cavity is reserved at the mouth of the pressure tank; the pressure tank is equipped with a pressurized air pipe, the output end of the air pipe is connected to a float, and the float is fixed at the air cavity in the preparation stage.

[0013] The test target plate is clamped and limited by the flange assembly, and a plate thickness adjustment ring for compensating for assembly clearance and a sealing ring for achieving watertight connection are arranged between the test target plate and the flange assembly.

[0014] The flange assembly is connected to a closed cylinder on the side facing away from the explosion. The laser sensor is installed at the bottom of the cylinder with a reserved distance from the test target plate. The rear end cover of the target is connected to a pressurized air pipe. Specifically, the bottom of the closed cylinder is connected to a pressurized air pipe, which is connected to a reserved air cavity at the mouth of the pressure tank. The air pressure inside the target cylinder is the same as the pressure of the reserved air cavity.

[0015] A protective shell is arranged at the bottom of the cylinder body, the laser sensor is located in the protective shell, and a buffer backing is filled between the protective shell.

[0016] A method for testing deepwater explosion power using an explosive deepwater explosion power target comprises the following steps:

[0017] Assemble the target model,

[0018] Lift the target model into the pressure tank and fill the pressure tank with water.

[0019] Blasting explosives, the target model is located below the explosives and bears the blasting force of the explosives. The pressurized air pipe connected to the rear end cover of the target model is connected to the reserved air cavity at the mouth of the pressure tank to ensure that the pressure inside and outside the target cylinder is consistent, thereby realizing the decoupling of the hydrostatic pressure and the underwater explosion load of the explosive on the structural response.

[0020] The laser sensor's perception data is acquired and analyzed to obtain the actual deep-water explosion power data of the explosives.

[0021] As a further improvement of the above technical solution:

[0022] During the decoupled analysis, the hydrostatic pressure is decoupled from the blast load.

[0023] The beneficial effects of the present invention are as follows:

[0024] The invention provides technical means and research basis for measuring and evaluating the deep-water explosion power of explosives.

[0025] The target model of the invention has reliable strength and can bear the rigidity and strength of structural deformation and explosion load.

[0026] The laser sensor of the present invention can work normally under high environmental pressure and impact conditions. The laser sensor is equipped with a protective structure, and a buffer mounting backing is used to fill and protect the space between the protective shell and the sensor.

[0027] The present invention utilizes a plate thickness adjustment ring to adjust the thickness of a test target plate so as to adapt to explosion tests of explosives of different masses and ensure that the test target plate can produce a certain degree of deformation without being damaged.

[0028] The present invention utilizes the stored gas of an external air compressor or a high-pressure gas tank to pressurize the air cavity through the pressurizing valve of the pressure tank. The pressurized air pipe connects the inside of the target and the air cavity to ensure that the pressure inside and outside the target are the same, thereby achieving the decoupling of the hydrostatic pressure and the underwater explosion load of the explosive on the structural response, obtaining the dynamic response of the real deep-water explosion load of the explosive on the structure, and evaluating the deep-water explosion power of the explosive. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a cross-sectional view of the target model of the present invention.

[0030] Figure 2 It is the front view of the target model of the present invention.

[0031] Figure 3 It is a schematic diagram of the preparation state of the present invention before the target model is released.

[0032] Figure 4 It is a schematic diagram of the state of the present invention when the target model has been placed.

[0033] Figure 5 It is a line graph of the displacement variables of the output data of the three laser sensors obtained after one experiment.

[0034] Among them: 1. Upper flange; 2. Test target plate; 3. Plate thickness adjustment ring; 4. Sealing ring; 5. Lower flange; 6. Lower flange reinforcement ribs; 7. Cylindrical cylinder; 8. Rear end cover; 9. Rear end cover reinforcement ribs; 10. Watertight joint; 11. Protective shell; 12. Buffer backing; 13. Laser sensor; 14. Measuring wire; 15. Pressurized air pipe; 16. Pressure tank; 17. Laying rope; 18. Cover; 19. Watertight joint of pressure tank; 20. Float; 21. Release hole; 22. Explosives; 23. Detonating wire; 24. Detonator; 25. Measuring system and computer; 26. Observation platform; 27. Observation window. DETAILED DESCRIPTION

[0035] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0036] like Figure 1-Figure 5As shown, the deepwater explosion power target of the explosive 22 of this embodiment simulates the deepwater explosion environment in a shallow water pressurized environment, including a test target plate 2 and a safety test space located on the side of the test target plate 2 away from the explosion. A plurality of laser sensors 13 are arranged in the safety test space, and the laser sensors 13 are used to sense the deformation degree of the test target plate 2.

[0037] The pressurized environment is a closable pressure tank 16, and the gas pressure in the tank can be relieved.

[0038] The target is a pre-assembled accessory. During the explosion test, the target and the explosive 22 are placed in the pressure tank 16.

[0039] An air cavity is reserved at the mouth of the pressure tank 16; the pressure tank 16 is equipped with a pressurized air pipe 15, the output end of the air pipe is connected to a float 20, and the float 20 is temporarily stored in the air cavity during the preparation stage.

[0040] The test target plate 2 is clamped and limited by the flange assembly, and a plate thickness adjustment ring 3 for compensating the assembly gap and a sealing ring 4 for achieving a watertight connection are arranged between the test target plate 2 and the flange assembly.

[0041] The flange assembly is connected to a closed cylinder on the side facing away from the explosion, and the laser sensor 13 is installed at the bottom of the cylinder with a reserved distance from the test target plate 2.

[0042] A protective shell 11 is disposed at the bottom of the cylinder, and a laser sensor 13 is located inside the protective shell 11 , with a buffer backing 12 filled between the protective shell 11 .

[0043] The target rear end cover 8 is connected to the pressurized air pipe 15 .

[0044] The method of using the explosive deep-water explosion power target to test the deep-water explosion power of this embodiment includes the following steps:

[0045] Assemble the target model,

[0046] The target model is hoisted into the pressure tank 16, and water is poured into the pressure tank 16.

[0047] The target model is located below the explosive 22 and bears the explosive load of the explosive 22.

[0048] The target rear end cover 8 is connected to the pressurized air pipe 15 and communicates with the reserved air cavity at the mouth of the pressure tank 16 to ensure that the pressure inside and outside the explosion target cylinder is consistent, thereby achieving the decoupling of the hydrostatic pressure and the underwater explosion load of the explosive on the structural response.

[0049] The sensing data of the laser sensor 13 is acquired and analyzed to obtain the actual explosion power data of the explosive 22 .

[0050] The specific structure of the present invention is as follows:

[0051] The present invention uses the test target as a "standard reference object" for evaluating the deep-water explosion power of the explosive 22, and uses the deformation of a simple circular plate structure to describe the working ability of the explosive 22 on the structure, so as to characterize the power of the deep-water explosion of the explosive 22.

[0052] The target model used in the present invention comprises an upper flange 1 and a lower flange 5, wherein a test target plate 2 is sandwiched between the upper flange 1 and the lower flange 5. The test target plate 2 and the lower flange 5 are sealed by a sealing ring 4, and a plate thickness adjustment ring 3 is also arranged on the test target plate 2.

[0053] The side of the lower flange 5 facing away from the upper flange 1 is connected with a cylindrical body 7, and the other end of the cylindrical body 7 is closed by a rear end cover 8. In order to improve the strength, a lower flange reinforcement rib 6 is provided on the lower flange 5, and a rear end cover reinforcement rib 9 is provided on the rear end cover 8. The space formed by the cylindrical body 7 is used to install a laser sensor 13. The number of laser sensors 13 is not less than 3, which are used to measure the displacement of the circular target plate at different radial positions. In order to prevent the laser sensor 13 from being damaged during the test, a protective shell 11 is provided on the rear end cover 8, and the laser sensor 13 is located in the protective shell 11, and a buffer backing 12 is provided between the laser and the protective shell 11 to prevent the laser sensor 13 from being damaged due to explosion.

[0054] The assembled target model is deployed. The entire target model is suspended above the mouth of the pressure tank 16 by the deployment rope 17 connected to the cover 18, and enters the pressure tank 16 from the mouth of the pressure tank 16, close to the hanging position of the explosive 22 suspended by the detonation line 23, so that the test target plate 2 can just withstand the explosion load below the explosive 22. The pressure tank 16 has an air cavity near the mouth. The air cavity is pressurized by an external air compressor or a high-pressure gas tank to apply pressure to the water in the pressure tank, thereby simulating a deep-water environment. The float 20 carried by the pressure air pipe is deployed in the air cavity. The rear end cover 8 of the target is connected to the pressurized air pipe 15, and the air pipe is connected to the reserved air cavity at the mouth of the pressure tank 16 to achieve consistent pressure inside and outside the target cylinder.

[0055] During the test, the detonating wire 23 receives a signal from the detonator 24 outside the discharge port to detonate the explosive 22. The experimental data received by the laser sensor 13 is passed through the watertight joint 10 and the pressure tank watertight joint 19 through the wire to the outside of the pressure tank 16 and connected to the measurement system and the computer 25.

[0056] After the explosive 22 is detonated, the measuring instrument obtains the displacement of the target model target plate at different positions, and processes and analyzes the measured data to evaluate the deep-water explosion power of different explosives 22.

[0057] The specific steps of the deep water explosion power test method are as follows:

[0058] Target model assembly stage:

[0059] The lower flange 5 is mounted on the cylindrical body 7 by welding, and the lower flange reinforcement rib 6 is connected between the lower flange 5 and the cylindrical body 7 by welding. The rear end cover 8 is mounted on the end surface of the other end of the cylindrical body 7 by welding, and the rear end cover reinforcement rib 9 is welded to the rear end cover 8. Thus, a cylindrical test data acquisition space is obtained.

[0060] Before installing the laser sensor 13 , the measuring wire 14 is passed through the watertight joint 10 to pass through the target model. The laser sensor 13 is fixed in the protective shell 11 through the protective shell 11 and the buffer backing 12 . The protective shell 11 is fixed to the rear end cover 8 by bolts.

[0061] The test target plate 2 is connected between the upper flange 1 and the lower flange 5 by bolts. The test target plate 2 is also equipped with a plate thickness adjustment ring 3 and a sealing ring 4 to achieve sealed installation. The plate thickness adjustment ring 3 is essentially a gasket. When a thinner test target plate 2 is used, a thicker plate thickness adjustment ring 3 is used to compensate for the installation gap; when a thicker test target plate 2 is used, a thinner plate thickness adjustment ring 3 is used to compensate for the installation gap.

[0062] Model deployment phase:

[0063] Use the laying rope 17 to hang the target model on the cover 18 of the pressure tank 16, and then pass the measuring wire 14 through the watertight joint 10 of the pressure tank 16 and out from the inside of the cover 18 of the pressure tank 16, so as to ensure that the measuring wire 14 is outside the pressure tank 16. At the same time, tie the float 20 to the pressurized air pipe 15 connected to the rear end cover 8 of the target at a position not less than 600mm near the tail end of the air pipe. The length of the pressurized air pipe 15 is not less than 25m. The float 20 connected to the end of the pressure air pipe is laid in the air cavity of the pressure tank 16;

[0064] The pressure tank 16 cover 18 and the target model are hoisted together by a laboratory crane, and after the target model is placed in the pressure tank 16, the pressure tank 16 is closed. The detonating wire 23 is passed through the discharge hole 21 of the cover 18 and pulled to a safe position, and the detonating wire 23 outside the pressure tank 16 is short-circuited; the measuring wire 14 of the laser sensor 13 is connected to the external measurement system and the computer 25. After the lead work is completed, the discharge hole 21 is sealed, and then water is poured into the pressure tank 16 until the water level reaches the position of the discharge hole 21.

[0065] Simulating the explosion stage in deep water environment:

[0066] After the water injection is completed, the observation model is confirmed to be in the tank layout state by using the observation window 27 on the observation platform 26; and the measurement system and the computer 25 are confirmed to be working properly;

[0067] After placing the explosive 22 to the test required position using the detonating wire 23, the charge hole 21 is closed, and the air compressor or the gas storage of the high-pressure gas tank is used to pressurize the pressure tank 16 through the pressure valve. Due to the connection of the pressurized gas pipe 15, the air cavity is pressurized while the inside of the target model is also pressurized;

[0068] When the pressure reaches the test requirement, the measurement system and computer 25 are started, and the detonation line 23 is connected to the detonator 24 to detonate the explosive 22, completing the power test data collection and storage;

[0069] The laser sensor 13 senses the displacement of the test target plate 2 at different radii under the requirements of the deep-water explosion power test of the explosive 22, and the measuring point includes the center position of the test target plate 2; the energy calculation is performed through the deformation model of the test target plate 2, and then the deep-water explosion power of the explosive 22 is evaluated. Since the energy calculation belongs to the subsequent steps, only the relevant content of the test device is proposed in this scheme, so the specific calculation is not repeated.

[0070] After the test is completed, the pressure tank 16 is depressurized through the pressure relief valve of the pressure tank 16. After the pressure relief is completed, the water level outside the pressure tank 16 is lowered to a safe position, and then the cover 18 is opened, the model is hoisted out, and the test target plate 2 is replaced to carry out the next working condition or shot test.

[0071] Compared with the prior art, the most significant difference of the present invention is that the sensor senses the deformation of the test target plate 2 instead of the way in which the sensor senses the explosion load in the prior art; the pressure vessel pressurization method is adopted to simulate the deep-water high-pressure environment, and the pressure inside the target is pressurized to balance the hydrostatic pressure of the external water area, so as to achieve the decoupling of the structural response of the hydrostatic pressure and the explosion load, and obtain the dynamic response of the deep-water explosion load of the real explosive 22 to the structure. And the replaceable test target plate 2 and the plate thickness adjustment ring 3 are used to be applicable to explosives 22 of various specifications and qualities. Therefore, the present invention simultaneously solves the three technical problems of not being able to reflect the effective utilization rate of energy, the difficulty in decoupling and distinguishing the explosion impact load and the hydrostatic pressure, and the narrow adaptability, and has outstanding substantial characteristics and significant progress.

[0072] The above description is an explanation of the present invention, not a limitation of the present invention. The scope of the present invention is defined in the claims. Any form of modification may be made within the scope of protection of the present invention.

Claims

1. A target for the deep-water explosion power of explosives, characterized in that: In a pressurized environment of a pressure vessel, a deep-water explosion environment is simulated, comprising a test target plate (2) and a safety test space located on the side of the test target plate (2) away from the explosion, wherein a plurality of laser sensors (13) are arranged in the safety test space, and the laser sensors (13) are used to sense the degree of deformation of the test target plate (2).

2. The explosive deepwater blasting power target as claimed in claim 1, characterized in that: The pressurized environment is a closable pressure tank (16), and the gas pressure in the tank can be relieved.

3. The deep water explosive power target of explosives as claimed in claim 2, characterized in that: The target is a pre-assembled accessory. During the explosion test, the target and the explosive (22) are placed in the pressure tank (16).

4. The deep water explosive power target of explosives as claimed in claim 2, characterized in that: An air cavity is reserved at the mouth of the pressure tank (16); the pressure tank (16) is equipped with a pressurized air pipe (15), the output end of the air pipe is connected with a floating ball (20), and the floating ball (20) is fixed at the air cavity in the preparation stage.

5. The deep water explosive power target of explosives as claimed in claim 1, characterized in that: The test target plate (2) is clamped and limited by a flange assembly, and a plate thickness adjustment ring (3) for compensating for assembly clearance and a sealing ring (4) for achieving a watertight connection are provided between the test target plate (2) and the flange assembly.

6. The deep water explosive power target of explosives as claimed in claim 5, characterized in that: The flange assembly is connected to a closed cylinder on the side facing away from the explosion, and a laser sensor (13) is installed at the bottom of the cylinder, with a reserved distance between the laser sensor and the test target plate (2).

7. The deep water explosive power target of explosives as claimed in claim 6, characterized in that: The bottom of the cylinder is connected to a pressurized air pipe (15), which is connected to a reserved air cavity at the mouth of a pressure tank (16), and the air pressure inside the target cylinder is the same as the pressure of the reserved air cavity.

8. The explosive deepwater explosion power target as claimed in claim 6, characterized in that: A protective shell (11) is arranged at the bottom of the cylinder, and the laser sensor (13) is located inside the protective shell (11), and a buffer backing (12) is filled between the protective shell (11).

9. A method for testing deep-water explosion power using the explosive deep-water explosion power target according to claim 1, characterized in that: The steps include: Assemble the target model, The target model is hoisted into the pressure tank (16), and water is injected into the pressure tank (16) to increase the pressure. The explosive (22) is blasted, and the target model is located below the explosive (22), bearing the explosive load of the explosive (22), acquiring the sensing data of the laser sensor (13), and decoupling analysis to obtain the actual deep-water explosion power data of the explosive (22).

10. The method for deep water explosion power testing according to claim 9, characterized in that: During the decoupled analysis, the hydrostatic pressure is decoupled from the blast load.

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