Explosion impact amplification device

Abstract

The present invention relates to an explosion impact amplification device, which comprises an impact base, an upper bracket, an impact platform, a double rocker assembly, a pressurizing mechanism and a lifting mechanism. The double rocker assembly is fixed on the impact base, and the double rocker assembly can contact or separate from the impact platform; the pressurizing mechanism and the impact platform are both arranged above the impact base, and the pressurizing mechanism is connected to the impact platform; the impact base is also provided with an upper bracket, and the upper bracket is fixed with a lifting mechanism, and the lifting mechanism can be connected or disconnected from the impact platform. The present invention can amplify the impact effect, and when the same impact strength is required, the use of the present device can appropriately reduce the required explosive equivalent.

Description

Technical Field

[0001] The invention belongs to the field of explosion impact, and in particular relates to an explosion impact amplification device and an application method thereof. Background Art

[0002] In the design of ships and ancillary equipment, due to the randomness and explosiveness of explosion loads, the impact resistance of the hull and internal equipment often requires explosion tests in real ships in addition to simulation calculations. Explosion impact test is a relatively extreme working condition. This test is usually conducted on ships or test platforms in rivers and seas. It requires a large amount of explosives and related personnel, and the test cost is high. Therefore, in a test, on the one hand, there are many types of tests, and a certain number of tests must be accumulated before they can be conducted. On the other hand, too many types of experiments lead to too large a test platform, which requires a large amount of explosives. Overall, the number of tests is small and may not meet the test requirements; the cost of a single test is high. Summary of the invention

[0003] Purpose of the invention: The present invention provides an explosion shock amplification device, which can be placed under experimental equipment that requires a larger shock. Its purpose is to be able to play a shock amplification role when an explosion shock occurs, so as to reduce the explosive equivalent and reduce costs, or to play a shock amplification role in a relatively small shock environment on a laboratory bench in a laboratory to achieve the required test effect.

[0004] Technical solution:

[0005] An explosion impact amplification device comprises an impact base, an upper bracket, an impact platform, a double rocker assembly, a pressurizing mechanism and a lifting mechanism. The double rocker assembly is fixed on the impact base, and the double rocker assembly can contact or separate from the impact platform; the pressurizing mechanism and the impact platform are both arranged above the impact base, and the pressurizing mechanism is connected to the impact platform; an upper bracket is also arranged on the impact base, and a lifting mechanism is fixed on the upper bracket, and the lifting mechanism can be connected to or disconnected from the impact platform.

[0006] The double rocker assembly includes a T-rod, a connecting rod and an elbow rod, which are hinged in sequence. The T-rod is hinged on the impact base, and the elbow rod 6 is also hinged on the impact base. The lower vertical side of the T-rod is hinged to the connecting rod, and the horizontal side of the T-rod can contact or separate from the impact platform. The end of the elbow rod is connected to an unlocking mass block.

[0007] The elbow rod is an η-shaped structure, with the short side of the elbow rod tilted inward, the end of the short side is hinged to the connecting rod, the bottom of the short side is fixedly hinged to the impact base, the end of the long side of the elbow rod is connected to the unlocking mass block, and the bottom of the long side touches the impact base.

[0008] The rocker mechanisms on the left and right sides of the impact platform are connected by a synchronous pull rod.

[0009] When the connecting rod is perpendicular to the lower vertical side of the T-bar, the relationship between the mass of the unlocking mass block and the mass of the impact platform is:

[0010]

[0011] Where: m is the mass of the unlocked mass block, in kg; M is the mass of the impact platform, in kg; a is the explosion impact acceleration, in m / s 2 ; g is the acceleration due to gravity, unit is m / s 2 ; F is the spring force of the pressure spring, N; L 1 is the distance between the impact platform and the first hinge, in m; L 2 is the distance from the first hinge to the second hinge in the double rocker mechanism, in meters; L 3 L is the distance from the fifth hinge to the fourth hinge in the double rocker mechanism, in m; 4 is the distance between the unlocked mass block and the fourth hinge, in m; α is the angle between the short side and the vertical line, in degrees.

[0012] The pressurizing mechanism is a pressurizing spring, one end of which is fixedly arranged on the top of the guide rod, and the other end of the pressurizing spring is connected to the impact platform.

[0013] The guide rod is fixedly arranged on the impact base, and passes through a guide hole arranged on the impact platform.

[0014] The lifting mechanism is symmetrically arranged on the upper bracket, and the two lifting mechanisms are connected by a chain. The lifting mechanism includes a lifting screw, an electromagnet and a sprocket. The lower end of the lifting screw is connected with an electromagnet, and the electromagnet can be adsorbed or disconnected from the impact platform. The lifting screw is threadedly connected to the sprocket, and the sprocket is fixedly arranged on the upper bracket, and the sprocket is meshed with the chain.

[0015] A height adjustment block is installed on the impact base.

[0016] An application method of an explosion impact amplification device, wherein a tested device is installed on an impact platform of the explosion impact amplification device, the explosion impact amplification device is placed on the explosion impact platform, the impact platform is pulled up by a lifting device and supported by a T-bar, the electromagnet is powered off and no longer adsorbs the impact platform, an explosion device is placed under the explosion impact platform, after the explosion device explodes, the explosion impact platform pushes the explosion impact amplification device to impact upward, so that the impact base impacts upward instantly, and at the same time, the unlocking mass block also impacts upward instantly, unlocking the support of the toggle rod on the T-bar, and the impact platform accelerates downward under the action of its own weight and the elastic potential energy of the spring, and collides with the upward impact base at high speed.

[0017] Advantages and effects:

[0018] Through the implementation of the present invention, the equipment to be tested is installed on the impact platform of the device. When the explosion impact occurs, the impact base impacts upward, and the impact platform carrying the test equipment impacts downward under the action of potential energy. The two collide with each other to produce an amplified impact effect. When the same impact intensity is required, the explosive equivalent required when using the device can be appropriately reduced. The device can also achieve an amplified impact effect on the impact test platform in the laboratory. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is the state at the moment of explosion impact of the present invention;

[0021] Figure 3 It is a schematic diagram of the connection of the double rocker structure;

[0022] Figure 4 It is a schematic diagram of an elbow lever;

[0023] Figure 5 This is a top view of the impact platform;

[0024] Figure 6 A state diagram is used for the present invention;

[0025] Figure 7 Schematic diagram of the relationship between the mass of the unlocking mass block and the mass of the impact platform;

[0026] Markings in the figure: 1. Pressure spring, 2. Guide rod, 3. Impact platform, 31. Guide hole, 4. T-bar, 41. Lower vertical side, 42. Horizontal side, 43. Upper vertical side, 44. First hinge, 45. Second hinge, 46. Third hinge, 47. Sixth hinge, 5. Connecting rod, 6. Elbow rod, 61. Short side, 62. Long side, 63. Fourth hinge, 64. Fifth hinge, 7. Unlocking mass block, 8. Impact base, 9. Upper bracket, 10. Synchronous pull rod, 11. Height adjustment block, 12. Lifting screw, 13. Electromagnet, 14. Sprocket, 15. Chain, 16. Test equipment, 17. Explosion impact amplification device, 18. Explosion impact platform, 19. Explosion device. DETAILED DESCRIPTION

[0027] The present invention provides an explosion impact amplification device. To make the purpose, technical solution and effect of the present invention clearer and more specific, the present invention is further described in detail below.

[0028] like Figure 1-2As shown, an explosion impact amplification device includes an impact base 8, an upper bracket 9, an impact platform 3, a double rocker assembly, a pressurizing mechanism and a lifting mechanism. The double rocker assembly is fixed on the impact base 8, and one end of the double rocker assembly can contact or separate from the impact platform 3; the pressurizing mechanism and the impact platform 3 are both arranged above the impact base 8, and the pressurizing mechanism can be adsorbed on or separated from the impact platform 3; an upper bracket 9 is also arranged on the impact base 8, and a lifting mechanism is fixed on the upper bracket 9, and the lifting mechanism can be connected to or disconnected from the impact platform 3.

[0029] like Figure 3 and Figure 5 As shown, each double rocker assembly includes a T-bar 4, a connecting rod 5 and an elbow rod 6, wherein the vertical side 41 of the T-bar 4, the connecting rod 5, the short side 61 of the elbow rod 6 and the relatively fixed impact base 8 constitute a double rocker mechanism, the T-bar 4, the connecting rod 5 and the elbow rod 6 are hinged in sequence, the vertical side 41 and the short side 61 are two rockers of the double rocker mechanism, the T-bar 4 and the connecting rod 5 form a revolving pair at the second hinge 45, and the connecting rod 5 and the elbow rod 6 form another revolving pair at the fifth hinge 64 The lower vertical side 41 of the T-bar 4 is hinged with the connecting rod 5, the horizontal side 42 of the T-bar 4 can contact or separate with the impact platform 3, the end of the elbow rod 6 is connected with the unlocking mass block 7, the T-bar 4 is hinged on the impact base 8 with the first hinge 44, and the elbow rod 6 is hinged on the impact base 8 with the fourth hinge 63. The horizontal sides 42 of the T-bar 4 of the four double rocker assemblies can contact or disconnect with the lower surface of the four corners of the impact platform 3, and can jointly support and lift or release the impact platform 3 at the same time. When the elbow rod 6 swings around the fourth hinge 63, the T-bar 4 is pulled by the connecting rod 5 to swing around the first hinge 44.

[0030] like Figure 3 and Figure 4 As shown, the elbow rod 6 is an n-shaped structure, and the short side 61 of the elbow rod 6 is inward. Figure 1 As shown in the downward tilted setting, the end of the short side 61 is hinged to the connecting rod 5 by the fifth hinge 64, the bottom of the short side 61 is fixedly hinged to the impact base 8 by the fourth hinge 63, the end of the long side 62 of the toggle rod 6 is connected to the unlocking mass block 7, and the bottom of the long side 62 touches the side wall of the impact base 8.

[0031] like Figure 1 As shown, the fifth hinge 64 is slightly lower than the line connecting the fourth hinge 63 and the second hinge 45. At this time, the T-bar 4 intends to rotate clockwise around the first hinge 44 under the downward force of the impact platform 3, and the T-bar 4 intends to push the elbow rod 6 to rotate clockwise around the fourth hinge 63 through the connecting rod 5. However, under the action of the unlocking mass block 7, the bottom of the long side of the elbow rod 6 abuts against the impact base 8, and the elbow rod 6 cannot move and is restricted from rotating. That is, the double rocker assembly is at the dead point position at this time. At this time, the impact platform 3 is held up by the horizontal sides 42 of the T-bar 4 on both sides and maintained at the highest position, so that the impact platform 3 has both its own gravity potential energy and the spring potential energy of the pressurizing mechanism.

[0032] The unlocking mass block 7 is used to maintain the position of each rod when the initial double rocker assembly is in the dead point position, and is used when an impact occurs, such as Figure 2 As shown, the unlocked mass block 7 moves upward by means of impact inertia, and its speed is higher than the upward speed of the impact base 8. At this time, the upward movement of the unlocked mass block 7 drives the toggle rod 6 to swing counterclockwise around the fourth hinge 63, and the T rod 4 is slightly rotated counterclockwise around the first hinge 44 through the connecting rod 5. After the impact platform 3 moves slightly upward, the fifth hinge 64 passes above the connection line of the fourth hinge 63 and the second hinge 45, thereby unlocking the support of the toggle rod 6 for the T rod 4, that is, at this time, the toggle rod 6 can rotate counterclockwise around the fourth hinge 63, and the T rod 4 can rotate clockwise around the first hinge 44, and the horizontal side 42 of the T rod 4 can no longer support the impact platform 3, so the impact platform 3 pushes the horizontal side 42 of the T rod 4 to swing downward, and the impact platform 3 moves downward instantly under the action of gravity potential energy and the potential energy of the pressure spring 1, and collides with the upward impact base 8. Due to the impact of opposite motion, the impact load amplification function is realized.

[0033] like Figure 7 As shown, when the connecting rod 5 is perpendicular to the lower vertical side 41 of the T-bar, the mass of the unlocking mass block 7 and the mass of the impact platform 3 are related by:

[0034]

[0035] Where: m is the mass of the unlocking mass block 7, in kg; M is the mass of the impact platform 3, in kg; a is the explosion impact acceleration, in m / s 2 ; g is the acceleration due to gravity, unit is m / s 2 ; F is the spring force of the pressure spring 1, N; L 1 is the distance between the impact platform 3 and the first hinge 44, in m; L 2 L is the distance from the first hinge 44 to the second hinge 45 in the double rocker mechanism, in m; 3 L is the distance from the fifth hinge 64 to the fourth hinge 63 in the double rocker mechanism, in m; 4 is the distance between the unlocking mass block 7 and the fourth hinge 63, in m; α is the angle between the short side 61 and the vertical line, in degrees.

[0036] like Figure 1 and Figure 5 As shown, Figure 5 This is a top view of the present invention, which is symmetrical about the A-A axis. Figure 5 The lifting mechanism and the upper bracket 9 are removed. The synchronous pull rod 10 is located on both sides of the impact platform 3.

[0037] Impact platform 3 Figure 1The rocker mechanisms on the left and right sides are connected by a synchronous pull rod 10. That is, the upper vertical edge 43 of the T rod 4 on the left side of the impact platform 3 is hinged to one end of the synchronous pull rod 10 through the third hinge 46, and the other end of the synchronous pull rod 10 is hinged to the lower vertical edge 41 of the T rod 4 on the right side of the impact platform 3 through the sixth hinge 47. The synchronous pull rod 10 synchronizes the rocker mechanisms on the left and right sides of the impact platform 3, so that the two T rods 4 can synchronously hold or release the impact platform 3. The T rod 4 on the right side of the impact platform 3 may not be provided with an upper vertical edge 43.

[0038] The pressurizing mechanism is a pressurizing spring 1, one end of which is fixedly arranged on the top of the guide rod 2, and the other end of the pressurizing spring 1 is connected to the impact platform 3. When the impact platform 3 is at the lowest position, the pressurizing spring 1 is in a natural state. When the impact platform 3 is pulled up by the lifting mechanism and supported by the T-bar 4, the impact platform 3 is at the highest position, and the pressurizing spring 1 is compressed to store potential energy. When the T-bar 4 releases the impact platform 3, the pressurizing spring 1 releases potential energy, pushing the impact platform 3 to accelerate downward impact, that is, in addition to the downward gravity potential energy that causes the impact platform 3 to impact downward, there is also elastic potential energy that causes it to accelerate downward impact.

[0039] The guide rod 2 is fixedly arranged on the striking base 8, and the guide rod 2 passes through the guide hole 31 arranged on the striking platform 3. The guide rod 2 limits the striking platform 3 to move up and down along the axial direction of the guide rod 2.

[0040] The lifting mechanisms are symmetrically arranged on the upper bracket 9, and the two lifting mechanisms are connected by a chain 15. The chain 15 enables the two lifting screw rods 12 to rise and fall synchronously through a sprocket wheel 14.

[0041] The lifting mechanism includes a lifting screw 12, an electromagnet 13 and a sprocket 14. The lower end of the lifting screw 12 is connected to the electromagnet 13, and the electromagnet 13 can be adsorbed or disconnected from the impact platform 3. The lifting screw 12 is threadedly connected to the sprocket 14, and the sprocket 14 is fixedly set on the upper bracket 9, and the sprocket 14 is meshed with the chain 15.

[0042] The two sprockets can be rotated synchronously by electric or manual means, and the nut can lift the lifting screw 12. During lifting, the electromagnet 13 is energized to attract the impact platform 3 and rotate the sprocket 14. Due to the transmission effect of the chain 15, the two lifting mechanisms move synchronously, that is, the lifting screw 12 is driven upward synchronously. When the impact platform 3 is supported by the T-bar 4, the electromagnet 13 is powered off, so that the lifting mechanism and the impact platform 3 are separated from the adsorption, and the impact is ready.

[0043] A height adjustment block 11 is installed on the impact base 8. The height adjustment block 11 is an iron block of different thicknesses, fixedly installed on the impact base 8, and is used to adjust the distance between the bottom surface of the impact platform 3 and the upper surface of the height adjustment block 11, thereby adjusting the impact force. A waveform generator or damper can also be installed.

[0044] An application method of an explosion impact amplification device, such as Figure 1 , Figure 2 and Figure 6 As shown, the tested device 16 is installed on the impact platform 3 of the explosion impact amplification device 17, and then the explosion impact amplification device 17 is placed on the explosion impact table 18. The impact platform 3 is pulled up by the lifting device and supported by the T rod 4. The electromagnet 13 is powered off and no longer absorbs the impact platform 3. The explosion device 19 is placed under the explosion impact table 18. After the explosion device 19 explodes, the explosion impact table 18 pushes the explosion impact amplification device 17 to impact upward, so the impact base 8 instantly impacts upward, and the unlocking mass block 7 also instantly impacts upward, unlocking the support of the toggle rod 6 to the T rod 4. Under the action of its own weight and the elastic potential energy of the spring 1, the impact platform 3 accelerates downward and collides with the upward impact base 8 at high speed. That is, the impact amplification effect is achieved.

[0045] Specifically for impact preparation, such as Figure 6 As shown, the explosion impact amplification device 17 is installed on the explosion impact platform 18, the explosion device 19 is installed under the explosion impact platform 18, the tested equipment 16 is installed on the impact platform 3, the electromagnet 13 is energized to attract the impact platform 3, and the sprocket 14 is rotated. Due to the transmission effect of the chain 15, the two lifting mechanisms move synchronously, that is, the lifting screw 12 is synchronously driven to move upward, and the impact platform 3 is driven to move upward, so that the impact platform 3 is supported by the horizontal side 42 of the T rod 4, and the electromagnet 13 is powered off to cancel the suction force of the lifting magnet 13. At this time, Figure 1 As shown, the fifth hinge 64 between the connecting rod 5 and the elbow rod 6 is slightly lower than the line connecting the fourth hinge 63 and the second hinge 45. Under the action of the unlocking mass block 7, the bottom of the long side of the elbow rod 6 abuts against the impact base 8, and the elbow rod 6 cannot rotate clockwise, that is, the double rocker assembly is at the dead point position. At this time, the impact platform 3 is held up at the highest position by the horizontal sides 42 of the T rod 4 on both sides. The pressure spring 1 is compressed and stores potential energy, so that the impact platform 3 has both its own gravity potential energy and the spring potential energy of the pressure mechanism. According to the height of the height adjustment block 11 adjusted according to the object to be measured, the impact height is determined, that is, the impact force is determined, and a damper can be installed as needed.

[0046] like Figure 2 and Figure 6As shown, when the explosion impact occurs, the impact base 8 of the explosion impact amplifying device 17 is installed on the explosion impact platform 18, and the explosion device 19 is placed under the explosion impact platform 18. The explosion device 19 explodes, and the explosive force pushes the explosion impact platform 18 to impact upward, and the explosion impact platform 18 pushes the impact base 8 to impact upward. At the moment of impact, due to the very large impact force, the toggle rod 6 where the unlocking mass block 7 is located is rotatably installed at the fixed fourth hinge 63. The unlocking mass block 7 can move upward instantly due to the impact inertia, driving the toggle rod 6 to swing counterclockwise around the fixed fourth hinge 63, thereby connecting The rod 5 drives the T-bar 4 to swing slightly counterclockwise around the fixed first hinge 44. After the T-bar 4 swings slightly counterclockwise and the horizontal side 42 of the T-bar 4 is slightly lifted, the fifth hinge 64 is above the connection line of the fourth hinge 63 and the second hinge 45, and the unlocking elbow rod 6 releases the support of the connecting rod 5 on the T-bar 4. At this time, the dead point position of the double rocker assembly is released, and the impact platform 3 is pressed down instantly under the action of the potential energy of gravity and the potential energy of the pressure spring 1, pushing the T-bar 4 to rotate clockwise around the first hinge 44, and pulling the other side of the T-bar 4 to rotate counterclockwise around the fixed hinge through the synchronous pull rod 10 and the sixth hinge 47. Figure 2 As shown, the impact platform 3 falls down instantly and collides with the impact base 8 which is rushing upward. Since the impact is in opposite directions, the impact load amplification function is achieved.

Claims

1. An explosion impact amplification device, characterized in that: The device comprises an impact base (8), an upper bracket (9), an impact platform (3), a double rocker assembly, a pressurizing mechanism and a lifting mechanism; the double rocker assembly is fixed on the impact base (8), and the double rocker assembly can be in contact with or separated from the impact platform (3); the pressurizing mechanism and the impact platform (3) are both arranged above the impact base (8), and the pressurizing mechanism is connected to the impact platform (3); the impact base (8) is also provided with an upper bracket (9), and the lifting mechanism is fixed on the upper bracket (9), and the lifting mechanism can be connected to or disconnected from the impact platform (3); The double rocker assembly comprises a T-rod (4), a connecting rod (5) and an elbow rod (6), wherein the T-rod (4), the connecting rod (5) and the elbow rod (6) are hinged in sequence, the T-rod (4) is hinged on the impact base (8), the elbow rod 6 is also hinged on the impact base (8), the lower vertical side (41) of the T-rod (4) is hinged on the connecting rod (5), the horizontal side (42) of the T-rod (4) can contact or separate from the impact platform (3), and the end of the elbow rod (6) is connected to an unlocking mass block (7); The elbow rod (6) is an n-shaped structure, the short side (61) of the elbow rod (6) is tilted inwardly, the end of the short side (61) is hinged to the connecting rod (5), the bottom of the short side (61) is fixedly hinged to the impact base (8), the end of the long side (62) of the elbow rod (6) is connected to the unlocking mass block (7), and the bottom of the long side (62) touches the impact base (8); The rocker mechanisms on the left and right sides of the impact platform (3) are connected via a synchronous pull rod (10); The T-rod (4) and the connecting rod (5) form a revolving pair at the second hinge (45), and the connecting rod (5) and the elbow rod (6) form another revolving pair at the fifth hinge (64); the T-rod (4) is hinged to the impact base (8) by the first hinge (44), and the elbow rod (6) is hinged to the impact base (8) by the fourth hinge (63); When the connecting rod (5) is perpendicular to the lower vertical side (41) of the T-bar, the mass of the unlocking mass block (7) and the mass of the impact platform (3) are related by: ； Where: m is the mass of the unlocking mass block (7), in kg; M is the mass of the impact platform (3), kg; a is the explosion impact acceleration, in m / s 2 ; g is the acceleration due to gravity, in m / s 2 ; F is the spring force of the pressure spring (1), in N; L1 is the distance between the impact platform (3) and the first hinge (44), in m; L2 is the distance from the first hinge (44) to the second hinge (45) in the double rocker mechanism, in m; L3 is the distance from the fifth hinge (64) to the fourth hinge (63) in the double rocker mechanism, in m; L4 is the distance between the unlocking mass block (7) and the fourth hinge (63), in m; α is the angle between the short side (61) and the vertical line, degrees; The pressurizing mechanism is a pressurizing spring (1), one end of which is fixedly arranged on the top of the guide rod (2), and the other end of which is connected to the impact platform (3).

2. The explosion impact amplification device according to claim 1, characterized in that: The guide rod (2) is fixedly arranged on the impact base (8), and the guide rod (2) passes through a guide hole (31) arranged on the impact platform (3).

3. The explosion impact amplification device according to claim 1, characterized in that: The lifting mechanisms are symmetrically arranged on the upper bracket (9), and the two lifting mechanisms are connected by a chain (15). The lifting mechanisms include a lifting screw (12), an electromagnet (13) and a sprocket (14). The lower end of the lifting screw (12) is connected to the electromagnet (13), and the electromagnet (13) can be adsorbed or disconnected from the impact release platform (3). The lifting screw (12) is threadedly connected to the sprocket (14), and the sprocket (14) is fixedly arranged on the upper bracket (9), and the sprocket (14) is meshed with the chain (15).

4. The explosion impact amplification device according to claim 1, characterized in that: A height adjustment block (11) is mounted on the impact base (8).

5. An application method of the explosion impact amplification device according to claim 1, characterized in that: The tested device (16) is installed on the impact platform (3) of the explosion impact amplification device (17). The explosion impact amplification device (17) is placed on the explosion impact table (18). The impact platform (3) is pulled up by the lifting device and supported by the T rod (4). The electromagnet (13) is powered off and no longer absorbs the impact platform (3). An explosion device (19) is placed under the explosion impact table (18). After the explosion device (19) explodes, the explosion impact table (18) pushes the explosion impact amplification device (17) to impact upward, so that the impact base (8) instantly impacts upward. At the same time, the unlocking mass block (7) also instantly impacts upward, unlocking the support of the toggle rod (6) on the T rod (4). Under the action of its own weight and the elastic potential energy of the spring (1), the impact platform (3) accelerates downward and collides with the upward impact base (8) at high speed.

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