Composite bulletproof armor bullet hole repairing device and application method thereof

Abstract

The invention belongs to the technical field of armor protection, and particularly relates to a composite bulletproof armor bullet hole repairing device and an application method thereof. The bullet hole repairing device comprises hard spherical particles, an adhesive, an isolating layer, an outer wrapping layer and a restraining cover. During storage, the isolating layer isolates the hard spherical particles from the adhesive; when the bullet hole repairing device is used, the bullet hole can be repaired by pulling out the isolating layer. The method is used for rapidly repairing the ceramic armor through the repairing device after the ceramic armor gets bullets, so that the bulletproof capability of a certain degree is recovered in a short time.

Description

Technical Field

[0001] The invention belongs to the technical field of armor protection, and in particular relates to a composite bulletproof armor bullet hole repairing device and an application method thereof. Background Art

[0002] Ceramic bulletproof armor is mainly used in the fields of armored vehicle armor and individual soldier shields. Its main function is to resist projectile strikes. However, after being hit by a bullet, the bullet will cause local structural damage to the ceramic bulletproof armor, including penetration holes and surrounding cracks. Although this structural damage is local, it will cause serious damage to the bullet resistance of the entire ceramic armor, and even lose the ability to resist bullets again. Generally, the armor that has been hit can only be replaced as a whole. However, in actual combat, due to weight restrictions, armored vehicles or individual soldiers generally find it difficult to carry replacement armor of the same weight.

[0003] Existing structural repair technologies are not suitable for repairing armor. Mechanical repair technologies, including bolts and rivets, require holes to be opened in the original structure, which will weaken the bulletproof ability of ceramic bulletproof armor. The patch repair technology used in the aerospace field can currently only be used to repair fiber-reinforced composite structural parts. Ceramic materials are hard and brittle, and the shape of bullet holes is irregular. In addition, repairing ceramic armor requires strong operability, fast repair speed, and light weight of repair materials. At present, no public technology that can meet the above requirements has been found. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The technical problem to be solved by the present invention is: how to provide a composite bulletproof armor bullet hole repair device and an application method thereof.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention provides a composite bulletproof armor bullet hole repair device, characterized in that the bullet hole repair device comprises: hard spherical particles, an adhesive, an isolation layer, an outer layer, and a restraining cover;

[0008] The hard spherical particles include at least two hard spherical particles of different diameters, and the hard spherical particles are perfect spheres; when stored, the hard spherical particles are arranged in an independent internal cabin;

[0009] The adhesive, when stored, is disposed in another independent internal compartment;

[0010] The isolation layer separates the spherical particles and the adhesive into two independent internal compartments when stored, and the isolation layer is configured to be withdrawn when used, thereby merging the two internal compartments of the spherical particles and the adhesive into one compartment;

[0011] The outer layer is made of plastic material and is arranged outside two independent internal chambers of the spherical particles and the adhesive. The outer layer is arranged to fully mix the spherical particles and the adhesive through extrusion deformation; the inner surface of the outer layer has a coating so as not to stick to the adhesive;

[0012] The restraining cover is circular and is arranged on the end surfaces of both ends of the outer cladding.

[0013] When the diameter of the bullet hole to be repaired is within 30mm, the device contains two hard spherical particles of different diameters;

[0014] When the diameter of the bullet hole to be repaired is between 30mm and 50mm, the device contains three hard spherical particles with different diameters;

[0015] For bullet holes larger than 50mm, the device contains four hard spherical particles of different diameters.

[0016] The diameter ratio of the hard spherical particles with different diameters is in the range of 1:0.05 to 1:0.3.

[0017] The quantity ratio of the hard spherical particles with different diameters is 1:1 to 1:4.

[0018] The hard spherical particles and the material of the armored object to be repaired belong to the same material system, including engineering ceramics, metal materials and a combination of the two.

[0019] The overall shape of the device is a cylinder, the ratio of its diameter to the diameter of the repaired bullet hole is 1:1 to 1.5:1, and the ratio of its height to the depth of the repaired bullet hole is 1:1 to 1.2:1.

[0020] The outer covering of the device can be folded into a cylindrical ring surface before being unfolded, and becomes a square after being unfolded.

[0021] The thickness ratio of the internal compartment where the hard spherical particles are located to the internal compartment where the adhesive is located is 2:1 to 4:1.

[0022] In addition, the present invention also provides an application method of the composite bulletproof armor bullet hole repairing device. The application method is for non-penetrating bullet holes, specifically: the initial state of the device is a cylinder, a restraining cover (5) is opened from one end of the device with a cylindrical shape, an isolation layer (4) is pulled out, and the restraining cover (5) is covered again, hard spherical particles of different diameters and an extrusion adhesive (3) are mixed evenly, the restraining cover (5) is opened again, an outer coating (6) is unfolded, the mixed material is squeezed into the bullet hole, and the outer coating (6) is covered around the bullet hole, and cured at room temperature for 24 hours.

[0023] In addition, the present invention also provides an application method of the composite bulletproof armor bullet hole repair device. The application method is for penetrating bullet holes, specifically comprising: preparing two bullet hole repair devices, which are divided into a bullet hole repair device A and a bullet hole repair device B; firstly, using the bullet hole repair device B to repair the bullet hole from the back of the armor; opening a restraining cover (5) from one end of the bullet hole repair device B having a cylindrical shape; pulling out an isolation layer (4); and then covering the restraining cover (5); uniformly mixing hard spherical particles of different diameters and an extrusion adhesive (3); and then opening the restraining cover (5); unfolding an outer layer (6); extruding the mixed material into the bullet hole; and covering the outer layer (6) around the bullet hole;

[0024] Then, a bullet hole repair device A is used to repair the bullet hole from the bullet-facing side of the armor, a restraining cover (5) is opened from one end of the bullet hole repair device A having a cylindrical shape, an isolation layer (4) is pulled out, and the restraining cover (5) is covered again, hard spherical particles of different diameters and an extrusion adhesive (3) are mixed evenly, and the restraining cover (5) is opened again, an outer layer (6) is unfolded, the mixed material is squeezed into the bullet hole, and the outer layer (6) is covered around the bullet hole; and the mixture is cured at room temperature for 24 hours.

[0025] (III) Beneficial effects

[0026] Compared with the prior art, the present invention provides a lightweight and portable device that allows combatants to quickly repair bullet holes in ceramic armor after being hit by bullets, thereby quickly restoring the armor's bulletproof capability to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a cross-sectional view of the bullet hole repair device structure.

[0028] Figure 2 This is a schematic diagram of how to use the bullet hole repair device.

[0029] Figure 3 This is a schematic diagram of using a bullet hole repair device to repair a non-penetrating bullet hole, see Example 1 for details.

[0030] Figure 4 This is a schematic diagram of using two bullet hole repairing devices to repair penetrating bullet holes. For details, see Example 2.

[0031] Among them: 1-first hard spherical particles, 2-second hard spherical particles, 3-adhesive, 4-isolation layer, 5-constraint cover, 6-outer cladding. DETAILED DESCRIPTION

[0032] In order to make the purpose, content, and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0033] Example 1

[0034] Repair the silicon carbide ceramic and aluminum alloy composite armor plate (to prevent and form non-penetrating bullet holes) after being hit by a single 7.62mm caliber ordinary bullet. The bullet hole repair device used includes hard spherical particles, adhesive, isolation layer, outer layer, and restraint cover. The device contains two hard spherical particles of different diameters. The first hard spherical particles and the second hard spherical particles are both made of silicon carbide, with diameters of 2.4mm and 0.2mm respectively, and the quantity ratio is 1:3. The overall shape of the bullet hole repair device is a cylinder, and the ratio of its diameter to the diameter of the repaired bullet hole is 1.2:1, and the ratio of its height to the depth of the repaired bullet hole is 1:1. The outer layer of the device can be folded into a cylindrical surface before it is unfolded, and it is a square after unfolding. The thickness ratio of the hard spherical particle cabin and the adhesive cabin is 3:1. The adhesive material is epoxy resin for ceramic composite materials.

[0035] The specific steps are as follows: open the restraint cover, pull out the isolation layer, cover the restraint cover, extrude and mix evenly, unfold the outer layer after opening the cover, extrude the mixed material into the bullet hole, and cover the outer layer around the bullet hole, and cure at room temperature for 24 hours.

[0036] The armor after being repaired by bullet impact was tested with a V50 value of 672 m / s using a 7.62 mm caliber ordinary bullet.

[0037] The silicon carbide ceramic and aluminum alloy composite armor plate, which can defend against 7.62mm caliber ordinary bullets (firing speed 825m / s), was subjected to a V50 test, and the V50 value was 862m / s.

[0038] The repaired armor reaches 78% of the v50 value of the good condition armor.

[0039] Example 2

[0040] The silicon carbide ceramic and aluminum alloy composite armor plates (forming through bullet holes after being penetrated) after being hit by a single 7.62mm caliber armor-piercing incendiary bullet were repaired. The bullet hole repair device A used includes hard spherical particles, adhesives, isolation layers, outer layers, and restraint covers. The device contains two hard spherical particles of different diameters. The first hard spherical particles and the second hard spherical particles are both made of silicon carbide, with diameters of 2.4mm and 0.2mm respectively, and the quantity ratio is 1:3. The overall shape of the bullet hole repair device is a cylinder, and the ratio of its diameter to the diameter of the repaired bullet hole is 1.2:1, and the ratio of its height to the depth of the repaired bullet hole is 1:1. The outer layer of the device can be folded into a cylindrical surface before it is unfolded, and it is a square after unfolding. The thickness ratio of the hard spherical particle cabin and the adhesive cabin is 3:1. The adhesive material is epoxy resin for ceramic composite materials.

[0041] The bullet hole repair device B used contains two hard spherical particles of different diameters. The first hard spherical particle and the second hard spherical particle are both made of 7A52 aluminum alloy, with diameters of 2 mm and 0.5 mm respectively, and the quantity ratio is 1:2. The rest of the structure is the same as that of device 1. The adhesive material is epoxy resin for aluminum alloy.

[0042] The specific steps are as follows: first, use the bullet hole repair device B to repair the bullet hole from the back of the armor, open the restraint cover, pull out the isolation layer, cover the restraint cover, extrude and mix evenly, open the cover and unfold the outer layer, extrude the mixed material into the bullet hole, and cover the area around the bullet hole with the outer layer; then, use the bullet hole repair device A to repair the bullet hole from the bullet-facing side of the armor, open the restraint cover, pull out the isolation layer, cover the restraint cover, extrude and mix evenly, open the cover and unfold the outer layer, extrude the mixed material into the bullet hole, and cover the area around the bullet hole with the outer layer, and cure at room temperature for 24 hours.

[0043] The repaired armor was subjected to a V50 test using a 7.62mm caliber ordinary bullet, and the V50 value was 605m / s.

[0044] The silicon carbide ceramic and aluminum alloy composite armor plate, which can defend against 7.62mm caliber ordinary bullets (firing speed 825m / s), was subjected to a V50 test, and the V50 value was 862m / s.

[0045] The repaired armor reaches 70% of the v50 value of the good condition armor.

[0046] Comparative Example 1 (hard spherical particles with three different diameter ratios)

[0047] The silicon carbide ceramic and aluminum alloy composite armor plate in Example 1 that can defend against 7.62 mm caliber ordinary bullets (firing speed 825 m / s) is subjected to a V50 test, and the V50 value is 862 m / s.

[0048] The silicon carbide ceramic and aluminum alloy composite armor plate (to prevent and form non-penetrating bullet holes) after being hit by a single 7.62mm caliber ordinary bullet is repaired. The bullet hole repair device used includes hard spherical particles, adhesive, isolation layer, outer layer, and restraint cover.

[0049] The device contains two hard spherical particles of different diameters, the first hard spherical particles and the second hard spherical particles are both made of silicon carbide, the diameter ratio is in the range of 1:0.05-1:0.6, see the table below, and the quantity ratio is 1:3. The rest of the structure is the same as that of Example 1.

[0050] The specific steps are the same as those in Example 1.

[0051] The armor after being repaired by bullet impact was subjected to V50 test using 7.62mm caliber ordinary bullets. The V50 values ​​are shown in the table below.

[0052] The repaired armor reaches 70% to 78% of the v50 value of the intact armor, among which the bulletproof performance is the best among the three when the hard spherical particle diameter ratio is 1:0.17.

[0053] Bulletproof ability test:

[0054]

[0055] Comparative Example 2 (Ratio of the number of hard spherical particles with different diameters)

[0056] The silicon carbide ceramic and aluminum alloy composite armor plate in Example 1 that can defend against 7.62 mm caliber ordinary bullets (firing speed 825 m / s) is subjected to a V50 test, and the V50 value is 862 m / s.

[0057] The silicon carbide ceramic and aluminum alloy composite armor plate (to prevent and form non-penetrating bullet holes) after being hit by a single 7.62mm caliber ordinary bullet is repaired. The bullet hole repair device used includes hard spherical particles, adhesive, isolation layer, outer layer, and restraint cover.

[0058] The device contains two hard spherical particles of different diameters. The first hard spherical particles and the second hard spherical particles are both made of silicon carbide, with diameters of 2.4 mm and 0.2 mm respectively. The quantity ratio is in the range of 1.2:1-1:5 as shown in the table below. The rest of the structure is the same as Example 1.

[0059] The specific steps are the same as those in Example 1.

[0060] The armor after being repaired by bullet impact was subjected to V50 test using 7.62mm caliber ordinary bullets. The V50 values ​​are shown in the table below.

[0061] The repaired armor reaches 70% to 78% of the v50 value of the intact armor, among which the V50 ratio before / after repair reaches 72% when the ratio of the number of hard spherical particles is 1.2:1, the V50 ratio before / after repair reaches 77% when the ratio of the number of hard spherical particles is 1:2, and the V50 ratio before / after repair reaches 78% when the ratio of the number of hard spherical particles increases to 1:5. After exceeding 1:3, the change in the ratio has no significant effect on the bulletproof performance.

[0062] Bulletproof ability test:

[0063]

[0064] Comparative Example 3 (the ratio of the overall diameter of the device to the diameter of the repaired bullet hole is 1:1 to 1.5:1, and the ratio of its height to the depth of the repaired bullet hole is 1:1 to 1.2:1)

[0065] The silicon carbide ceramic and aluminum alloy composite armor plate in Example 1 that can defend against 7.62 mm caliber ordinary bullets (firing speed 825 m / s) is subjected to a V50 test, and the V50 value is 862 m / s.

[0066] Repair the silicon carbide ceramic and aluminum alloy composite armor plate (to prevent and form non-penetrating bullet holes) after being hit by a single 7.62mm caliber ordinary bullet. The bullet hole repair device used includes hard spherical particles, adhesive, isolation layer, outer layer, and restraint cover. The overall shape of the bullet hole repair device is a cylinder, and the ratio of its diameter to the diameter of the repaired bullet hole is in the range of 1:1 to 1.5:1, and the ratio of its height to the depth of the repaired bullet hole is in the range of 1:1 to 1.2:1. The specific parameters are shown in the table below.

[0067] The device contains two hard spherical particles with different diameters, and the first hard spherical particles and the second hard spherical particles are both made of silicon carbide. The other parameters are the same as those in Example 1.

[0068] The specific steps are the same as those in Example 1.

[0069] The armor after being repaired by bullet impact was subjected to V50 test using 7.62mm caliber ordinary bullets. The V50 values ​​are shown in the table below.

[0070] The armor after repair is in good condition and the v50 value of the armor is between 69-78%. When the height ratio remains unchanged at 1:1.1 and the diameter ratio is 1:1, the V50 ratio before / after repair is 69%. When the diameter ratio is 1:1.3, the V50 ratio before / after repair reaches 77%. When the diameter ratio is 1:1.6, the V50 ratio before / after repair reaches 78%. The results show that after exceeding 1:1.3, the increase in diameter ratio does not significantly increase the bulletproof performance.

[0071] When the diameter ratio remains unchanged at 1:3 and the height ratio is 1:1, the V50 ratio before / after repair is 72%. When the height ratio is 1:1.3, the V50 ratio before / after repair reaches 78%. When the diameter ratio is 1:1.5, the V50 ratio before / after repair reaches 78%. The results show that after exceeding 1:1.3, the increase in height ratio has no significant effect on the increase in ballistic performance.

[0072] Bulletproof ability test:

[0073]

[0074]

[0075] Comparative Example 4 (Thickness ratio of hard spherical particle cabin to adhesive cabin 2:1 to 4:1)

[0076] The silicon carbide ceramic and aluminum alloy composite armor plate in Example 1 that can defend against 7.62 mm caliber ordinary bullets (firing speed 825 m / s) is subjected to a V50 test, and the V50 value is 862 m / s.

[0077] The silicon carbide ceramic and aluminum alloy composite armor plates (to prevent and form non-penetrating bullet holes) after being hit by a single 7.62mm caliber ordinary bullet are repaired. The bullet hole repair device used includes hard spherical particles, adhesives, isolation layers, outer layers, and restraint covers. The device contains two hard spherical particles of different diameters, and the first hard spherical particles and the second hard spherical particles are both made of silicon carbide. The thickness ratio of the hard spherical particle cabin and the adhesive cabin varies in the range of 2:1 to 4:1, see the table below. The remaining parameters are the same as in Example 1.

[0078] The specific steps are the same as those in Example 1.

[0079] The armor after being repaired by bullet impact was subjected to V50 test using 7.62mm caliber ordinary bullets. The V50 values ​​are shown in the table below.

[0080] The repaired armor reaches 69-78% of the V50 value of the intact armor. When the height ratio is 1:1.1 and the diameter ratio is 1:1, the V50 ratio before and after repair is 69%. When the diameter ratio is 1:1.3, the V50 ratio before and after repair reaches 77%. When the diameter ratio is 1:1.6, the V50 ratio before and after repair reaches 78%. The results show that after exceeding 1:1.3, the increase in diameter ratio does not significantly increase the anti-ballistic performance. When the thickness ratio is 3:1, the V50 ratio before and after repair is the best.

[0081] Bulletproof ability test:

[0082]

[0083]

[0084] 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 technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A composite bulletproof armor bullet hole repair device, characterized in that: The bullet hole repair device comprises: hard spherical particles, an adhesive, an isolation layer, an outer layer, and a restraining cover; The hard spherical particles include at least two hard spherical particles of different diameters, and the hard spherical particles are perfect spheres; when stored, the hard spherical particles are arranged in an independent internal cabin; The adhesive, when stored, is disposed in another independent internal compartment; The isolation layer separates the spherical particles and the adhesive into two independent internal compartments when stored, and the isolation layer is configured to be withdrawn when used, thereby merging the two internal compartments of the spherical particles and the adhesive into one compartment; The outer cladding is made of plastic material and is arranged outside two independent internal chambers of the spherical particles and the adhesive. The outer cladding is arranged to fully mix the spherical particles and the adhesive through extrusion deformation; the inner surface of the outer cladding has a coating so as not to stick to the adhesive; The restraining cover is circular and is arranged on the end surfaces of both ends of the outer cladding.

2. The bullet hole repairing device for composite bulletproof armor according to claim 1, characterized in that: When the diameter of the bullet hole to be repaired is within 30mm, the device contains two hard spherical particles of different diameters; When the diameter of the bullet hole to be repaired is between 30mm and 50mm, the device contains three hard spherical particles with different diameters; For bullet holes larger than 50mm, the device contains four hard spherical particles of different diameters.

3. The bullet hole repairing device for composite bulletproof armor according to claim 1, characterized in that: The diameter ratio of the hard spherical particles with different diameters is in the range of 1:0.05 to 1:0.

3.

4. The bullet hole repairing device for composite bulletproof armor according to claim 1, characterized in that: The quantity ratio of the hard spherical particles with different diameters is 1:1 to 1:

4.

5. The bullet hole repairing device for composite bulletproof armor according to claim 1, characterized in that: The hard spherical particles and the material of the armored object to be repaired belong to the same material system, including engineering ceramics, metal materials and a combination of the two.

6. The bullet hole repairing device for composite bulletproof armor according to claim 1, characterized in that: The overall shape of the device is a cylinder, the ratio of its diameter to the diameter of the repaired bullet hole is 1:1 to 1.5:1, and the ratio of its height to the depth of the repaired bullet hole is 1:1 to 1.2:

1.

7. The bullet hole repairing device for composite bulletproof armor according to claim 6, characterized in that: The outer covering of the device can be folded into a cylindrical ring surface before being unfolded, and becomes a square after being unfolded.

8. The bullet hole repairing device for composite bulletproof armor according to claim 6, characterized in that: The thickness ratio of the internal compartment where the hard spherical particles are located to the internal compartment where the adhesive is located is 2:1 to 4:

1.

9. An application method of the bullet hole repairing device for composite bulletproof armor according to any one of claims 1 to 8, characterized in that: The application method is aimed at non-penetrating bullet holes, specifically: the initial state of the device is a cylinder, a restraining cover (5) is opened from one end of the device with a cylindrical shape, the isolation layer (4) is pulled out, and the restraining cover (5) is covered again, hard spherical particles of different diameters and an extrusion adhesive (3) are mixed evenly, the restraining cover (5) is opened again, the outer coating (6) is unfolded, the mixed material is squeezed into the bullet hole, and the outer coating (6) is covered around the bullet hole, and cured at room temperature for 24 hours.

10. An application method of the bullet hole repairing device for composite bulletproof armor according to any one of claims 1 to 8, characterized in that: The application method is aimed at penetrating bullet holes, specifically comprising: preparing two bullet hole repair devices, namely a bullet hole repair device A and a bullet hole repair device B; firstly using the bullet hole repair device B to repair the bullet hole from the back of the armor; opening a restraining cover (5) from one end of the bullet hole repair device B having a cylindrical shape; pulling out an isolation layer (4); then covering the restraining cover (5); uniformly mixing hard spherical particles of different diameters and an extrusion adhesive (3); then opening the restraining cover (5); unfolding an outer layer (6); extruding the mixed material into the bullet hole; and covering the outer layer (6) around the bullet hole; Then, a bullet hole repair device A is used to repair the bullet hole from the bullet-facing side of the armor, a restraining cover (5) is opened from one end of the bullet hole repair device A having a cylindrical shape, an isolation layer (4) is pulled out, and the restraining cover (5) is covered again, hard spherical particles of different diameters and an extrusion adhesive (3) are mixed evenly, and the restraining cover (5) is opened again, an outer layer (6) is unfolded, the mixed material is squeezed into the bullet hole, and the outer layer (6) is covered around the bullet hole; and the mixture is cured at room temperature for 24 hours.

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