A variable-caliber impact friction damping anti-collision barrel

Abstract

A variable-caliber impact friction damping anti-collision barrel belongs to the field of traffic safety facilities, including an inner ring support fixed base cylinder, a middle ring movable steel cylinder, an outer ring movable steel cylinder, a soft energy dissipation protection cushion layer, etc. The outer ring of the inner ring support fixed base cylinder is provided with a middle ring movable steel cylinder, the outer ring of the middle ring movable steel cylinder is provided with an outer ring movable steel cylinder, and the outer layer of the outer ring movable steel cylinder is provided with a soft energy dissipation protection cushion layer. The outer wall of the inner ring support fixed base cylinder is fixedly provided with a plurality of inner ring base cylinder fixed connection boxes, a first variable-caliber impact friction damping medium is provided in the inner ring base cylinder fixed connection box, a plurality of middle ring steel cylinder fixed damping columns are provided, the outer wall of the middle ring movable steel cylinder is fixedly connected with a plurality of middle ring steel cylinder fixed connection boxes, and a second variable-caliber impact friction damping medium is provided on the middle ring steel cylinder fixed connection box. The anti-collision barrel of the present invention can effectively prevent collision and reduce collision damage.

Description

Technical Field

[0001] The invention belongs to the field of traffic safety facilities, and in particular relates to a variable-caliber impact friction damping anti-collision barrel. Background Art

[0002] Crash barrels are a very common road traffic safety device, mainly installed in places where cars are prone to collide with fixed facilities on highways and urban roads. For example, at road bends, entrances and exits of roads and elevated roads, they can play a role in isolation, warning and collision prevention. They can buffer accidental collisions with vehicles, effectively reduce the impact force, and greatly reduce the damage to vehicles and people. Therefore, it can significantly reduce the damage to vehicles and personnel. The reflective material on its surface can be affixed with an indication label as needed. The plastic anti-collision barrel can be filled with water or yellow sand. After being filled with water and yellow sand, it will have the ability to buffer the impact force. The plastic anti-collision barrel has a good buffering effect on traffic impact force after being filled with water or yellow sand, but when it is not needed, the water and yellow sand can be poured out and it can be easily and flexibly moved away. The anti-collision barrel is made of materials with good elasticity, high strength and strong performance. Reflective materials will be affixed to the surface. When the light shines on it, a reflective effect can be achieved. It is clearly visible day and night. In some more dangerous areas, such as road turns, exits and entrances, and highways with faster speeds, it has been widely used in places where there are safety risks. On the one hand, the reflective material set on the anti-collision barrel can effectively play the role of traffic prompts. On the other hand, when a vehicle collides with the anti-collision barrel, a anti-collision barrel with buffering performance is set, which can greatly buffer the huge impact force generated by the collision, thereby greatly reducing the severity of traffic collision accidents. Heavy consequences, and the existing crash barrels are generally made of plastic and other materials, which are not strong enough and have poor buffering performance. At the same time, the current crash barrels are generally light in weight, and are easily moved under the action of external force impact, and are easy to scratch passing vehicles and pedestrians, causing great safety hazards and easily causing secondary injuries. Under the action of huge impact force, due to its insufficient strength in design, weak impact resistance and poor buffering performance, the existing crash barrels are generally prone to deformation of the crash barrel structure. Crash barrels are very necessary traffic safety infrastructure. my country's highways have been developed since the 1980s, and they play an important role in the development of the national economy and society. Crash barrels are very important safety protection facilities for highways. Crash barrels can effectively play a role of prevention, warning and safety protection, and can effectively reduce the losses caused by accidents, effectively reduce the probability of vehicle damage caused by accidental collisions, reduce the probability of property losses and casualties, and protect people's lives and property from infringement to the greatest extent. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the present invention provides a variable-caliber impact friction damping anti-collision barrel, the outer ring movable steel cylinder can drive the outer ring steel cylinder fixed damping column and the second variable-caliber impact friction damping medium to have mutual friction energy consumption, the variable-caliber structural design of the second variable-caliber impact friction damping medium and the second fixed connection box with a built-in buffer and reserved forward space are more conducive to friction and extrusion with the outer ring steel cylinder fixed damping column, and at the same time, the energy consumption efficiency is higher, the middle ring movable steel cylinder can drive the middle ring steel cylinder fixed damping column and the first variable-caliber impact friction damping medium to have friction energy consumption, the variable-caliber structural design of the first variable-caliber impact friction damping medium and the first fixed connection box with a built-in buffer and reserved forward space are more conducive to friction and extrusion with the middle ring steel cylinder fixed damping column.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The variable-caliber impact friction damping anti-collision barrel mainly includes an inner ring supporting fixed base barrel, a middle ring movable steel barrel, an outer ring movable steel barrel, a soft energy-absorbing protective cushion layer, a reinforced filling foundation layer, a middle ring steel barrel fixed damping column, an inner ring base barrel fixed connecting box, a first variable-caliber impact friction damping medium, a first large-volume anti-collision weight-added shock-absorbing cavity, an outer ring steel barrel fixed damping column, a middle ring steel barrel fixed connecting box, a second variable-caliber impact friction damping medium, a second large-volume anti-collision weight-added shock-absorbing cavity, a barrel cover, a barrel base, high-strength gripping fixed steel nails, a first fixed connecting box with a built-in buffer reserved forward space, and a second fixed connecting box with a built-in buffer reserved forward space, etc. In the structure of the variable-caliber impact friction damping anti-collision barrel, A middle ring movable steel cylinder is arranged on the outer ring of the inner ring supporting fixed base cylinder, an outer ring movable steel cylinder is arranged on the outer ring of the middle ring movable steel cylinder, a soft energy-absorbing protective cushion layer is arranged on the outer layer of the outer ring movable steel cylinder, a barrel cover plate is arranged above the anti-collision barrel structure, a barrel base is arranged below the anti-collision barrel structure, the barrel cover plate and the barrel base are both fixedly connected to the inner ring supporting fixed base cylinder, in the anti-collision barrel located on special sections or special positions, a number of high-strength gripping steel nails and ground fixation are arranged below the barrel base, a reinforced filling foundation layer is arranged in the area surrounded by the inner ring supporting fixed base cylinder, the barrel cover plate and the barrel base, a number of inner ring base cylinder fixed connection boxes are arranged and fixedly connected to the outer wall of the inner ring supporting fixed base cylinder, and the inner ring base cylinder is fixed A first variable-caliber impact friction damping medium is arranged in the connecting box, and the first variable-caliber impact friction damping medium is provided with a wide-mouth end and a small-mouth end, the small-mouth end is arranged at a position adjacent to the outer wall of the inner ring support fixed base cylinder, and the wide-mouth end is arranged at a position away from the outer wall of the inner ring support fixed base cylinder, and a plurality of middle-ring steel cylinder fixed damping columns are arranged, one end of which is fixedly connected to the inner wall of the middle-ring movable steel cylinder, and the other end is arranged in the inner-ring base cylinder fixed connecting box, and the area between this end and the outer wall of the inner-ring support fixed base cylinder is reserved for forward movement of the first fixed connecting box built-in buffer, and at the same time, a first large-volume anti-collision weight-increasing shock-absorbing cavity is arranged between the inner-ring support fixed base cylinder and the middle-ring movable steel cylinder, and a plurality of middle-ring steel cylinder fixed connecting boxes are arranged It is fixedly connected to the outer wall of the middle circle movable steel cylinder, and a second variable-caliber impact friction damping medium is arranged in the middle circle steel cylinder fixed connection box. The second variable-caliber impact friction damping medium is provided with a wide-mouth end and a small-mouth end. The small-mouth end is arranged at a position adjacent to the outer wall of the middle circle movable steel cylinder, and the wide-mouth end is arranged at a position away from the outer wall of the middle circle movable steel cylinder. A plurality of outer circle steel cylinder fixed damping columns are arranged, one end of which is fixedly connected to the inner wall of the outer circle movable steel cylinder, and the other end is arranged in the middle circle steel cylinder fixed connection box, and the area between this end and the outer wall of the middle circle movable steel cylinder is reserved for forward space for the built-in buffer of the second fixed connection box. At the same time, a second large-volume anti-collision weight-increasing shock-absorbing cavity is arranged between the middle circle movable steel cylinder and the outer circle movable steel cylinder.

[0006] The materials used for the inner ring supporting fixed base cylinder, the middle ring movable steel cylinder and the outer ring movable steel cylinder are low yield point steel materials determined according to design requirements.

[0007] The soft energy-absorbing protective cushion is made of polyurethane material.

[0008] The middle circle steel cylinder fixed damping column, the first variable-caliber impact friction damping medium, the outer circle steel cylinder fixed damping column, and the second variable-caliber impact friction damping medium are made of rubber material.

[0009] The reinforced filling base layer is filled with sand and gravel.

[0010] The barrel cover plate and the barrel bottom are fixedly connected to the inner ring supporting fixed base cylinder and are not fixedly connected to the middle ring movable steel cylinder and the outer ring movable steel cylinder.

[0011] The diameter of the middle steel cylinder fixed damping column is set between the wide mouth diameter and the small mouth diameter of the first variable-caliber impact friction damping medium, and the diameter of the outer steel cylinder fixed damping column is set between the wide mouth diameter and the small mouth diameter of the second variable-caliber impact friction damping medium.

[0012] When in use, the variable-caliber impact friction damping crash bucket of the present invention injects sand into the first large-volume crash-proof weight-added shock-absorbing cavity and the second large-volume crash-proof weight-added shock-absorbing cavity, and the amount of sand is determined according to the actual road speed and the special road section or special position where the crash bucket is located.

[0013] The beneficial effects of the present invention are:

[0014] The variable-caliber impact friction damping crash bucket of the present invention is suitable for being set up on roads with fast vehicle speeds or special sections or special positions where accidental collisions are prone to occur. When in use, the present invention injects sand into the large-volume anti-collision weight-added shock-absorbing cavity. The amount of sand injected is determined according to the actual road speed and the special section or special position where the crash bucket is located to achieve an ideal anti-collision and shock-absorbing effect. When an accidental collision occurs, the soft energy-absorbing protective cushion layer can firstly reduce shock and collision energy consumption, and can buffer the instantaneous impact force while reducing the vibration response of the vehicle body and the crash bucket. Secondly, the inner ring supporting fixed base cylinder, the middle ring movable steel cylinder and the outer ring movable steel cylinder can coordinate with each other, and the outer ring movable steel cylinder It can drive the outer ring steel cylinder fixed damping column and the second variable-caliber impact friction damping medium to consume mutual friction energy. The variable-caliber structural design of the second variable-caliber impact friction damping medium and the second fixed connecting box with a built-in buffer and reserved forward space are more conducive to the friction and extrusion with the outer ring steel cylinder fixed damping column, and at the same time, the energy consumption efficiency is higher. The middle ring movable steel cylinder can drive the middle ring steel cylinder fixed damping column and the first variable-caliber impact friction damping medium to consume friction energy. The variable-caliber structural design of the first variable-caliber impact friction damping medium and the first fixed connecting box with a built-in buffer and reserved forward space are more conducive to the friction and extrusion with the middle ring steel cylinder fixed damping column. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of a front view or a side view of a variable-caliber impact friction damping anti-collision barrel of the present invention;

[0016] Figure 2 It is a schematic diagram of a front view or a side view of a variable-caliber impact friction damping anti-collision barrel with high-strength gripping fixing steel nails of the present invention;

[0017] Figure 3 It is a top view schematic diagram of the variable-caliber impact friction damping anti-collision barrel of the present invention;

[0018] Figure 4 for Figure 1 AA cross-sectional diagram of ;

[0019] Figure 5 for Figure 4 An enlarged schematic diagram of the middle circle movable steel cylinder, outer circle movable steel cylinder, outer circle steel cylinder fixed damping column, middle circle steel cylinder fixed connecting box, second variable-caliber impact friction damping medium and second fixed connecting box built-in buffer reserved forward space setting in area A.

[0020] In the figure: 1 is the inner ring supporting fixed base cylinder; 2 is the middle ring movable steel cylinder; 3 is the outer ring movable steel cylinder; 4 is the soft energy absorption protective cushion layer; 5 is the reinforced filling base layer; 6 is the middle ring steel cylinder fixed damping column; 7 is the inner ring base cylinder fixed connection box; 8 is the first variable-caliber impact friction damping medium; 9 is the first large-volume anti-collision weight-added shock-absorbing cavity; 10 is the outer ring steel cylinder fixed damping column; 11 is the middle ring steel cylinder fixed connection box; 12 is the second variable-caliber impact friction damping medium; 13 is the second large-volume anti-collision weight-added shock-absorbing cavity; 14 is the barrel cover; 15 is the barrel base; 16 is the high-strength grip fixed steel nail; 17 is the first fixed connection box built-in buffer reserved forward space; 18 is the second fixed connection box built-in buffer reserved forward space. DETAILED DESCRIPTION

[0021] In order to further illustrate the present invention, the present invention is described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be construed as limiting the protection scope of the present invention.

[0022] A variable caliber impact friction damping anti-collision barrel, such as Figure 1~Figure 5As shown, it mainly includes an inner ring supporting fixed base cylinder 1, a middle ring movable steel cylinder 2, an outer ring movable steel cylinder 3, a soft energy absorption protective cushion layer 4, a reinforced filling foundation layer 5, a middle ring steel cylinder fixed damping column 6, an inner ring base cylinder fixed connecting box 7, a first variable-caliber impact friction damping medium 8, a first large-volume anti-collision weight-increasing shock-absorbing cavity 9, an outer ring steel cylinder fixed damping column 10, a middle ring steel cylinder fixed connecting box 11, a second variable-caliber impact friction damping medium 12, a second large-volume anti-collision weight-increasing shock-absorbing cavity 13, a barrel cover 14, a barrel base 15, high-strength gripping fixed steel nails 16, a first fixed connecting box built-in buffer reserved forward space 17, and a second fixed connecting box built-in buffer reserved forward space 18, etc., and the variable-caliber impact friction damping In the structure of the crash bucket, a middle ring movable steel cylinder 2 is arranged on the outer ring of the inner ring supporting fixed base cylinder 1, an outer ring movable steel cylinder 3 is arranged on the outer ring of the middle ring movable steel cylinder 2, a soft energy-absorbing protective cushion layer 4 is arranged on the outer layer of the outer ring movable steel cylinder 3, a barrel cover plate 14 is arranged above the crash bucket structure, and a barrel base 15 is arranged below the crash bucket structure. The barrel cover plate 14 and the barrel base 15 are both fixedly connected to the inner ring supporting fixed base cylinder 1. In the crash bucket located on a special road section or a special position, a plurality of high-strength gripping fixing steel nails 16 are arranged below the barrel base 15 and fixed to the ground, a reinforcement filling foundation layer 5 is arranged in the area surrounded by the inner ring supporting fixed base cylinder 1, the barrel cover plate 14 and the barrel base 15, and a plurality of inner ring base cylinder fixing layers 14 and 15 are arranged. The fixed connection box 7 is fixedly connected to the outer wall of the inner ring support fixed base tube 1, and a first variable-caliber impact friction damping medium 8 is arranged on one side of the inner ring base tube fixed connection box 7. The first variable-caliber impact friction damping medium 8 is a right-angled triangle. The first variable-caliber impact friction damping medium 8 is arranged on the opposite sides of a group of inner ring base tube fixed connection boxes 7. The first variable-caliber impact friction damping medium 8 is provided with a wide-mouth end and a small-mouth end. The small-mouth end is arranged at a position adjacent to the outer wall of the inner ring support fixed base tube 1, and the wide-mouth end is arranged at a position away from the outer wall of the inner ring support fixed base tube 1. One end thereof is fixedly connected to the inner wall of the middle ring movable steel tube 2, and the other end is arranged in the inner ring base tube fixed connection box 7. A plurality of middle ring steel tube fixed damping media are arranged. Column 6, each of the middle circle steel cylinder fixed damping columns 6 is inserted into a first variable-caliber impact friction damping medium 8 relative to a group of inner circle base cylinder fixed connecting boxes 7, and the area between this end and the outer wall of the inner circle support fixed base cylinder 1 is a forward space 17 reserved for the built-in buffer of the first fixed connecting box, and at the same time, a first large-volume anti-collision weight-added shock-absorbing cavity 9 is arranged between the inner circle support fixed base cylinder 1 and the middle circle movable steel cylinder 2, and a plurality of middle circle steel cylinder fixed connecting boxes 11 are arranged and fixedly connected to the outer wall of the middle circle movable steel cylinder 2, and a second variable-caliber impact friction damping medium 12 is arranged in the middle circle steel cylinder fixed connecting box 11, and the second variable-caliber impact friction damping medium 12 is arranged in the same manner as the first variable-caliber impact friction damping medium 8.The second variable-caliber impact friction damping medium 12 is provided with a wide-mouth end and a small-mouth end. The small-mouth end is arranged at a position adjacent to the outer wall of the middle circle movable steel cylinder 2, and the wide-mouth end is arranged at a position away from the outer wall of the middle circle movable steel cylinder 2. A plurality of outer ring steel cylinder fixed damping columns 10 are arranged, one end of which is fixedly connected to the inner wall of the outer ring movable steel cylinder 3, and the other end is arranged in the middle ring steel cylinder fixed connection box 11, and the area between this end and the outer wall of the middle circle movable steel cylinder 2 is a forward space reserved for the built-in buffer of the second fixed connection box 18. At the same time, a second large-volume anti-collision weight-added shock-absorbing cavity 13 is arranged between the middle circle movable steel cylinder 2 and the outer ring movable steel cylinder 3.

[0023] The materials used for the inner ring supporting fixed base cylinder 1, the middle ring movable steel cylinder 2 and the outer ring movable steel cylinder 3 are low yield point steel materials determined according to design requirements.

[0024] The soft energy dissipation protection cushion layer 4 is made of polyurethane material.

[0025] The middle ring steel cylinder fixed damping column 6, the first variable-caliber impact friction damping medium 8, the outer ring steel cylinder fixed damping column 10, and the second variable-caliber impact friction damping medium 12 are made of rubber material.

[0026] The reinforcement filling base layer 5 is filled with sand and gravel.

[0027] The barrel cover plate 14 and the barrel base 15 are both fixedly connected to the inner ring supporting fixed base cylinder 1 and are not fixedly connected to the middle ring movable steel cylinder 2 and the outer ring movable steel cylinder 3.

[0028] The diameter of the middle steel cylinder fixed damping column 6 is set between the wide mouth diameter and the small mouth diameter of the first variable-caliber impact friction damping medium 8, and the diameter of the outer steel cylinder fixed damping column 10 is set between the wide mouth diameter and the small mouth diameter of the second variable-caliber impact friction damping medium 12.

[0029] When in use, the variable-caliber impact friction damping anti-collision barrel of the present invention injects sand into the first large-volume anti-collision weight-added shock-absorbing cavity 9 and the second large-volume anti-collision weight-added shock-absorbing cavity 13, and the amount of sand is determined according to the actual road speed, the special section or special position where the anti-collision barrel is located.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A variable-caliber impact friction damping anti-collision barrel, Features: The invention comprises an inner ring support fixed base cylinder (1), a middle ring movable steel cylinder (2), an outer ring movable steel cylinder (3), a soft energy absorption protective cushion layer (4), a reinforced filling foundation layer (5), a middle ring steel cylinder fixed damping column (6), an inner ring base cylinder fixed connection box (7), a first variable-caliber impact friction damping medium (8), a first large-volume anti-collision weight-increasing shock-absorbing cavity (9), an outer ring steel cylinder fixed damping column (10), a middle ring steel cylinder fixed connection box (11), a second variable-caliber impact friction damping medium (12), a second large-volume anti-collision weight-increasing shock-absorbing cavity (13), a barrel cover plate (14), a barrel base (15), high-strength gripping fixed steel nails (16), a first fixed connection box built-in buffer reserved forward space (17) and a second fixed connection box built-in buffer reserved forward space A middle ring movable steel cylinder (2) is arranged on the outer ring of the inner ring supporting fixed base cylinder (1), an outer ring movable steel cylinder (3) is arranged on the outer ring of the middle ring movable steel cylinder (2), a soft energy-absorbing protective cushion layer (4) is arranged on the outer layer of the outer ring movable steel cylinder (3), a barrel cover plate (14) is arranged above the anti-collision barrel, a barrel base (15) is arranged below the anti-collision barrel, the barrel cover plate (14) and the barrel base (15) are both fixedly connected to the inner ring supporting fixed base cylinder (1), a reinforcement filling base layer (5) is arranged in the area surrounded by the inner ring supporting fixed base cylinder (1), the barrel cover plate (14) and the barrel base (15), a plurality of inner ring base cylinder fixed connection boxes (7) are fixedly arranged on the outer wall of the inner ring supporting fixed base cylinder (1), and a plurality of inner ring base cylinder fixed connection boxes (7) are arranged on the inner ring base cylinder fixed connection boxes ( 7) is provided with a first variable-caliber impact friction damping medium (8), the first variable-caliber impact friction damping medium (8) is provided with a wide-mouth end and a small-mouth end, the small-mouth end is provided at a position adjacent to the outer wall of the inner ring support fixed base cylinder (1), and the wide-mouth end is provided at a position away from the outer wall of the inner ring support fixed base cylinder (1), a plurality of middle ring steel cylinder fixed damping columns (6) are provided, one end of which is fixedly connected to the inner wall of the middle ring movable steel cylinder (2), and the other end is provided in the inner ring base cylinder fixed connection box (7), and the area between this end and the outer wall of the inner ring support fixed base cylinder (1) is a first fixed connection box built-in buffer reserved forward space (17), and at the same time a first large-volume anti-collision weight-added shock-absorbing cavity (9) is provided between the inner ring support fixed base cylinder (1) and the middle ring movable steel cylinder (2), The outer wall of the middle ring movable steel cylinder (2) is fixedly connected to a plurality of middle ring steel cylinder fixed connection boxes (11), and a second variable-caliber impact friction damping medium (12) is provided on the middle ring steel cylinder fixed connection box (11). The second variable-caliber impact friction damping medium (12) is provided with a wide-mouth end and a small-mouth end, the small-mouth end is provided at a position adjacent to the outer wall of the middle ring movable steel cylinder (2), and the wide-mouth end is provided at a position away from the outer wall of the middle ring movable steel cylinder (2). A plurality of outer ring steel cylinder fixed damping columns (10) are provided, one end of which is fixedly connected to the inner wall of the outer ring movable steel cylinder (3), and the other end is provided in the middle ring steel cylinder fixed connection box (11), and the area between this end and the outer wall of the middle ring movable steel cylinder (2) is a forward space (18) reserved for the built-in buffer of the second fixed connection box.At the same time, a second large-volume anti-collision weight-increasing shock-absorbing cavity (13) is arranged between the middle ring movable steel cylinder (2) and the outer ring movable steel cylinder (3); A plurality of high-strength ground-gripping fixing steel nails (16) are provided below the barrel base (15); The inner ring supporting fixed base cylinder (1), the middle ring movable steel cylinder (2) and the outer ring movable steel cylinder (3) are made of low yield point steel.

2. The variable-caliber impact friction damping anti-collision barrel as claimed in claim 1, Features: The soft energy-absorbing protective cushion layer (4) is made of polyurethane material.

3. The variable-caliber impact friction damping anti-collision barrel as described in claim 1, Features: The middle steel cylinder fixed damping column (6), the first variable-caliber impact friction damping medium (8), the outer steel cylinder fixed damping column (10), and the second variable-caliber impact friction damping medium (12) are made of rubber material.

4. The variable-caliber impact friction damping anti-collision barrel as claimed in claim 1, Features: The reinforcement filling base layer (5) is filled with sand and gravel.

5. The variable-caliber impact friction damping anti-collision barrel as described in claim 1, Features: The barrel cover plate (14) and the barrel base (15) are both fixedly connected to the inner ring supporting fixed base cylinder (1) and are not fixedly connected to the middle ring movable steel cylinder (2) and the outer ring movable steel cylinder (3).

6. The variable-caliber impact friction damping anti-collision barrel as claimed in claim 1, Features: The diameter of the middle steel cylinder fixed damping column (6) is set between the diameter of the wide mouth end and the diameter of the small mouth end of the first variable-caliber impact friction damping medium (8), and the diameter of the outer steel cylinder fixed damping column (10) is set between the diameter of the wide mouth end and the diameter of the small mouth end of the second variable-caliber impact friction damping medium (12).

7. The variable-caliber impact friction damping anti-collision barrel as claimed in claim 1, Features: The first large-volume anti-collision weight-added shock-absorbing cavity (9) and the second large-volume anti-collision weight-added shock-absorbing cavity (13) are filled with sand.

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