Drag light device

Abstract

The tracer device comprises a shell, a center hole and a main charging groove which is communicated with one side of the center hole in the circumferential direction and is wound outside the center hole are formed in the shell, a hole opening in one axial end of the center hole is an ignition opening, and black powder is filled in the ignition opening; ignition powder pressed on the black powder and transition powder pressed on the ignition powder are arranged in the center hole, and a double-base emission tablet is further arranged in the ignition opening; the rotating direction of the main charging groove is opposite to the rotating direction of the shell during flying, and the main charging groove is filled with main charging powder and transition powder pressed on the main charging powder. After the cannonball is shot out, the stable and reliable tracer effect is achieved, and the main problems that a traditional tracer device is generally unreliable in ignition performance, scattered in the flying process and broken in fire are solved.

Description

Technical Field

[0001] The invention relates to the field of tracer devices, in particular to a tracer device. Background Art

[0002] The tracer device is installed at the bottom of the shell. When the shell is fired, the high temperature and high pressure environment in the barrel is used to ignite the tracer device at the same time. After the shell leaves the barrel, it can continue to emit light, indicating the flight trajectory of the shell and used to correct the trajectory. The current common tracer device is to press the ignition powder and transition powder along the direction of the shell's flight, and the main charge is pressed along the curved surface of the shell's rotation direction. There are the following problems: 1. The ignition sequence of the traditional tracer device is pilot charge, transition charge, and main charge. The pilot charge pressing surface is a flat structure and is not easy to ignite when receiving ignition.

[0003] 2. The center hole of the traditional tracer device has no powder blocking structure. Under high overload, the powder layer in the center hole is easily thrown out, causing sparks and misfire.

[0004] 3. In the traditional tracer device structure, the rotation direction of the main charge slot is consistent with the rotation direction of the shell. When the shell rotates at high speed, the burning surface of the main charge is easily peeled off, causing sparks and misfire.

[0005] 4. In the traditional tracer device structure, the main charge is filled separately in the main charge slot, which is prone to misfire during the combustion process.

[0006] 5. The traditional tracer device has a countersunk hole on the bottom plane. During installation, a pin-type wrench needs to be inserted into the countersunk hole to install the knob. The installation is not easy to operate, the rotation force is insufficient, and there is a risk of inadequate installation. Summary of the invention

[0007] The present invention provides a tracer device to solve the problems existing in the tracer device of the prior art.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is: A tracer device comprises a housing (6), wherein the housing (6) has a central hole inside and a main charge groove spirally extending from one side of the central hole to the outside of the central hole, and the starting end of the main charge groove is connected to the corresponding side of the central hole, the hole opening at one axial end of the central hole serves as an ignition port, black powder (2) is loaded in the ignition port, the central hole contains an ignition charge (3) pressed on the black powder (2) and a transition charge (4.1) pressed on the ignition charge (3), the ignition port also contains a double-base propellant tablet (1) closely attached to the black powder (2), and the black powder (1) is pressed against the ignition charge (3) by the double-base propellant tablet (1); The rotation direction of the main charge groove is opposite to that of the shell in flight. The main charge groove is filled with main charge (5) and transition charge (4.2) pressed on the main charge (5), thereby making the rotation direction of the main charge (5) opposite to that of the shell in flight.

[0009] Furthermore, the side of the black powder (1) in contact with the double-base propellant tablet (1) is configured as an uneven rough surface.

[0010] Furthermore, a powder-blocking convex ring (10) is provided on the circumferential inner wall of the ignition port, and the black powder (1) is located inside the powder-blocking convex ring (10).

[0011] Furthermore, it also includes a casting rubber (7) and a sealing gasket (8), wherein the casting rubber (7) is applied on the transition charge (4.1) in the center hole and on the transition charge (4.2) in the main charge groove, and the sealing gasket (8) is pressed on the casting rubber (7).

[0012] Furthermore, a wrench groove (9) is provided on the circumferential outer wall of the housing (6).

[0013] Furthermore, the circumferential outer wall of the shell (6) is provided with a thread having a rotation direction opposite to that of the shell during flight.

[0014] Furthermore, the ignition charge (3) is obtained by uniformly mixing two types of magnesium powder, barium nitrate and barium peroxide in a weight ratio of 3:2:4 and then granulating with phenolic resin. The two types of magnesium powder are FM4 and FM5 respectively, and the usage ratio of the two types of magnesium powder is 1:1.

[0015] Furthermore, the transitional charge (4) is prepared by mixing the ignition charge (3) and the main charge (5) in a weight ratio of 1:1.

[0016] Furthermore, the main charge (5) is prepared by mixing magnesium powder, polyvinyl chloride, strontium nitrate and iron oxide in a weight ratio of 30:8:50:5 and then granulating with a binder.

[0017] The tracer device of the present invention has an ignition sequence of black powder, ignition powder, transition powder and main charge. Black powder is easier to ignite, which improves the ignition reliability. In addition, a concave-convex structure is arranged on the black powder pressing powder surface, which increases the fire-receiving area of ​​the black powder and further improves the ignition reliability.

[0018] The tracer device of the present invention adds a powder-blocking convex ring at the ignition port of the tracer device housing, which reduces the impact of the gunpowder pressure in the gun barrel on the ignition powder surface and can prevent the central powder column of the ignition hole from being thrown out at high overload when it is fired.

[0019] The tracer device of the present invention changes the combustion rotation direction of the main charge, making the combustion direction opposite to the rotation direction of the shell during flight. During the rotation of the shell, the combustion surface will be eroded instead of peeled off, making it difficult for the combustion surface to be thrown out.

[0020] The tracer device of the present invention spreads a layer of transitional charge on the upper layer of the main charge. Since the flammability of the transitional charge is higher than that of the main charge, the main charge is driven to burn continuously by the transitional charge, and the fire is not easily interrupted.

[0021] The tracer device of the present invention has a spanner groove arranged on the circumferential side of the shell, which makes it easier to install by clamping with a spanner, and the installation is more convenient and reliable.

[0022] The tracer device of the present invention is used at the bottom of the shell, and plays a stable and reliable tracer role after the shell is fired. The main problems of the conventional tracer device, such as unreliable ignition, scattered sparks and misfire during flight, are solved, and the assembly convenience of the tracer device is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front cross-sectional view of the structure of an embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram of the structure of the central drug column in an embodiment of the present invention.

[0025] Figure 3 It is a top view of the shell structure of an embodiment of the present invention.

[0026] Figure 4 It is a front cross-sectional view of the shell structure of an embodiment of the present invention. DETAILED DESCRIPTION

[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, this embodiment discloses a tracer device, comprising a cylindrical housing 6 with a vertical axis. A coaxial center hole 6.1 is provided at the center of the housing 6, and a main charge groove 6.2 is spirally wound around the center hole 6.1 from one side of the center hole 6.1. The main charge groove 6.2 is connected to the corresponding side of the center hole 6.1 at the beginning of the corresponding side of the center hole. The rotation direction of the main charge groove 6.2 is opposite to the rotation direction of the shell in flight. Wrench grooves 9 are provided on the two symmetrical sides of the lower part of the circumferential outer wall of the housing 6, and the circumferential outer wall of the housing 6 has a thread with a rotation direction opposite to that of the shell in flight.

[0029] The axial lower end opening of the center hole 6.1 is the ignition port, and a charge retaining convex ring 10 is provided on the upper part of the circumferential inner wall of the ignition port. Black powder 2 is loaded in the charge retaining convex ring 10 in the ignition port. Ignition charge 3 is loaded in the center hole 6.1 above the charge retaining convex ring 10, and the ignition charge 3 is pressed on the top surface of the black powder 2. Transition charge 4.1 is loaded in the center hole 6.1 above the ignition charge 3, and the transition charge 4.1 is pressed on the top surface of the ignition charge 3. Double-base propellant tablets 1 are loaded in the ignition port below the charge retaining convex ring 10, and the double-base propellant tablets 1 are tightly attached to the bottom surface of the black powder 2, and the bottom surface of the black powder 2 is set to an uneven rough surface. The main charge groove 6.2 is loaded with the main charge 5 and the transition charge 4.2 pressed on the top surface of the main charge 5.

[0030] The shell 6 is also provided with a casting rubber 7 and a sealing gasket 8. The casting rubber 7 is applied to the top surface of the transition charge 4.1 in the center hole and the top surface of the transition charge 4.2 in the main charge groove. The sealing gasket 8 is pressed on the casting rubber 7, and the sealing gasket 8 seals the inside of the shell 6.

[0031] When assembling the product of this embodiment, firstly, the black powder 2, the ignition charge 3 and a part of the transition charge 4.1 are loaded into the center hole 6.1 of the shell 6 through the top of the center hole 6.1, and compacted with a certain pressure by a press; then the main charge 5 and another part of the transition charge 4.2 are loaded into the main charge groove 6.2, and compacted with a certain pressure; then the double-base propellant tablet 1 is bonded to the bottom surface of the black powder 2 in the ignition port with acetone nitrocellulose glue; finally, the casting glue 7 is applied to the top surfaces of the transition charge 4.1 and the transition charge 4.2, and then the sealing gasket 8 is pasted on the casting glue 7.

[0032] In this embodiment, the double-base propellant tablet 1 is a double-base sheet propellant for mortar propelling charge, which has high flammability. When in use, it is bonded to the bottom surface of the black powder 2 at the ignition port with acetone nitrocellulose to improve the ignition reliability of the product.

[0033] In this embodiment, the black powder 2 has high flammability and is used to receive the flame of the propellant in the gunpowder cartridge of the artillery shell and ignite the ignition powder 3. When the black powder 2 is pressed, the bottom surface of the black powder 2 is roughened, and the uneven rough surface increases the fire-receiving area. A plastic film is added to the base to assist in the hemp making, thereby enhancing the ignition reliability of the black powder 2.

[0034] In this embodiment, the ignition charge 3 is obtained by mixing two specifications of magnesium powder, barium nitrate and barium peroxide in a weight ratio of 3:2:4 and then granulating with phenolic resin. The two specifications of magnesium powder are FM4 and FM5, and the usage ratio of the two specifications of magnesium powder is 1:1. The content of barium peroxide is relatively high, so that the agent has a higher combustion speed and combustion heat.

[0035] The transition charge 4 is made by mixing the ignition charge 3 and the main charge 5 in a weight ratio of 1:1, and plays a transitional role in the combustion sequence to prevent the occurrence of a burning interruption when the ignition charge 3 ignites the main charge 5.

[0036] In this embodiment, the main charge 5 is made of magnesium powder, polyvinyl chloride, strontium nitrate, and iron oxide in a weight ratio of 30:8:50:5, and then granulated using a binder configured with two resins, 711 resin and 3051 resin. The raw materials of each component are dried before the main charge 5 is configured, and no drying is required after granulation. After being naturally placed for 2 hours, the medicine is pressed. After the medicine is pressed into the shell, it is cured in the shell. The core formed by curing has higher strength and can adapt to the high overload when the shell is fired.

[0037] In this embodiment, the shell 6 is cylindrical, and the circumferential outer wall is connected to the tail fuze device using a special M26×1 thread. The thread direction is left-handed, which is opposite to the rotation direction of the shell during flight, ensuring that the tracer device will not fall off during firing. A center hole 6.1 is provided at the center of the shell, and black powder 2, ignition powder 3, and transition powder 4 are contained in the center hole 6.1. A main charge groove 6.2 is provided on one side of the center hole along the center to the outside. When ignited, the agent in the center hole 6.1 transfers the combustion to the main charge 5 and transition powder 4.2 in the main charge groove 6.2. The uppermost transition powder 4.2 in the main charge groove 6.2 enhances the combustion reliability of the main charge 5. The combustion direction of the agent in the main charge groove 6.2 is counterclockwise, which is opposite to the rotation direction of the shell. During the rotation of the shell, the combustion surface will produce erosion instead of peeling, so that the combustion surface is not easy to be thrown out. A powder-blocking convex ring 10 is arranged in the ignition port of the center hole 6.1, which reduces the impact of the gunpowder pressure in the barrel on the ignition powder surface and can prevent the center powder column of the ignition hole 6.1 from being thrown out by high overload.

[0038] In this embodiment, the casting glue 7 has high strength and heat resistance, and is used to bond the sealing gasket. It can maintain the integrity of the structure during the combustion of the transition medicine and the basic medicine in the shell. With the assistance of the sealing gasket, it avoids the occurrence of fire jumps on the combustion surface, ensuring the stable combustion of the basic medicine to meet the product luminous time requirements.

[0039] In this embodiment, the sealing gasket 8 is made of asbestos, which has high heat resistance and certain plasticity. When assembled in the tail of the projectile, it can fully cooperate and contact with the bottom structural parts of the projectile body under the action of pressure, so that the tracer device will not be displaced under high overload in the barrel, and the structural integrity can be maintained during the combustion of transition charge and basic charge.

[0040] In this embodiment, the spanner groove 9 is easier to install by clamping with a spanner than the spanner hole, and the installation is more convenient and reliable.

[0041] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and such combinations should also be regarded as the contents disclosed in the present disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0042] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A tracer device, comprising a housing (6), the housing (6) having a central hole inside, and a main charge groove spirally extending from one side of the central hole to the outside of the central hole, and the starting end of the main charge groove is connected to the corresponding side of the central hole, characterized in that: The hole opening at one axial end of the center hole serves as an ignition port, and black powder (2) is loaded into the ignition port. The center hole is loaded with an ignition charge (3) pressed on the black powder (2) and a transition charge (4.1) pressed on the ignition charge (3). The ignition port is also loaded with a double-base propellant tablet (1) closely attached to the black powder (2), and the black powder (1) is pressed against the ignition charge (3) through the double-base propellant tablet (1); The rotation direction of the main charge groove is opposite to that of the shell in flight. The main charge groove is filled with main charge (5) and transition charge (4.2) pressed on the main charge (5), thereby making the rotation direction of the main charge (5) opposite to that of the shell in flight.

2. A tracer device according to claim 1, characterized in that: The side of the black powder (1) in contact with the double-base propellant tablet (1) is configured as an uneven rough surface.

3. A tracer device according to claim 1, characterized in that: A powder-blocking convex ring (10) is provided on the circumferential inner wall of the ignition port, and the black powder (1) is located inside the powder-blocking convex ring (10).

4. A tracer device according to claim 1, characterized in that: It also includes a casting rubber (7) and a sealing gasket (8), wherein the casting rubber (7) is applied on the transition charge (4.1) in the center hole and on the transition charge (4.2) in the main charge groove, and the sealing gasket (8) is pressed on the casting rubber (7).

5. A tracer device according to claim 1, characterized in that: A wrench groove (9) is provided on the circumferential outer wall of the housing (6).

6. A tracer device according to claim 1, characterized in that: The circumferential outer wall of the housing (6) is provided with a thread having a rotation direction opposite to that of the shell during flight.

7. A tracer device according to any one of claims 1 to 6, characterized in that: The ignition charge (3) is obtained by uniformly mixing two types of magnesium powder, barium nitrate and barium peroxide in a weight ratio of 3:2:4 and then granulating with phenolic resin. The two types of magnesium powder are FM4 and FM5 respectively, and the usage ratio of the two types of magnesium powder is 1:

1.

8. A tracer device according to any one of claims 1 to 6, characterized in that: The transitional charge (4) is prepared by mixing the ignition charge (3) and the main charge (5) in a weight ratio of 1:

1.

9. A tracer device according to any one of claims 1 to 6, characterized in that: The main charge (5) is made by mixing magnesium powder, polyvinyl chloride, strontium nitrate and iron oxide in a weight ratio of 30:8:50:5 and then granulating with a binder.

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