Gun barrel dehumidification and grease spraying maintenance device

Through the dehumidification and grease spraying maintenance device of the cannon bore, the combination of air machine and heating device is used to solve the problem of moisture and rifle corrosion of the cannon bore, and the dehumidification and uniform application of protective grease in the cannon bore are achieved, which improves the maintenance quality of the cannon.

CN116465253BActive Publication Date: 2025-08-22CHINESE PEOPLES LIBERATION ARMY UNIT 69246
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202310324440.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-03-29
Publication Date
2025-08-22
Estimated Expiration
2043-03-29

AI Technical Summary

Technical Problem

After the artillery has been stopped for a long time or the fire has been completed, the moisture and rifle in the barrel cause rust, and the existing methods of applying oil cannons cannot be effectively solved.

Method used

The dehumidification and grease injection maintenance device of the cannon chamber is adopted, and the air machine is used to provide high-pressure airflow and heating device. By combining jet and oil injection, water vapor is rapidly evaporated and protective oil is heated to achieve dehumidification and application of the cannon chamber.

Benefits of technology

Effectively prevent rust of the gun chamber, ensure that protective grease is evenly applied to all parts of the gun chamber, and improve the artillery maintenance efficiency and protective effect.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN116465253B_ABST
    Figure CN116465253B_ABST
Patent Text Reader

Abstract

The present invention discloses a maintenance device for dehumidifying and grease spraying a gun barrel, relating to the field of protective devices for armored equipment components. The technical solution of the present invention comprises a pressurizing device, an air pipe, an oil pipe, a heat exchange container, and a heating device. One end of the air pipe is connected to the pressurizing device, and the other end of the air pipe is provided with an air gun. The air pipe includes a heat exchange section, which is located within the heat exchange container. The heat exchange container is equipped with protective oil and a heating device. An air inlet connected to the pressurizing device is provided at the top of the heat exchange container. One end of the oil pipe is connected to the bottom of the heat exchange container, and the other end of the oil pipe is provided with an oil spray gun. An air machine is used to simultaneously provide power for air jet and oil spraying, while the heat exchange container is used to heat the protective oil and the gas ejected externally. The overall solution is highly integrated, cleverly utilizing the relationship between air jet and oil spraying to achieve the effect of multiple functions in multiple parts at the same time.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The invention relates to the field of armor equipment component protection devices, in particular to a gun barrel dehumidification grease spraying maintenance device. Background Art

[0002] When a gun is stored for an extended period of time and after firing, or after the barrel has been cleaned, it is necessary to apply grease to the barrel. Firstly, in cold climates, moisture can accumulate in the barrel, and applying grease can trap moisture between the grease and the barrel wall, causing rust. Secondly, after the barrel has been cleaned with a barrel cleaner, the rifling lines prevent the grease from being wiped clean, which contains H2O. Applying grease can trap the grease underneath the grease, causing rust. Secondly, because the barrel has rifling lines, applying grease with a brush, which is dipped in viscous grease, prevents the grease from being effectively applied to the rifling lines, leaving the unapplied metal surfaces susceptible to corrosion. Summary of the Invention

[0003] In order to solve the above technical problems, the present invention provides a gun barrel dehumidification and grease spraying maintenance device, which uses an air machine to simultaneously provide power for air jet and oil injection, and uses a heat exchange container to heat the protective oil on the one hand and heat the gas sprayed out on the other hand. The overall solution is highly integrated and cleverly utilizes the relationship between air jet and oil injection to achieve the effect of multiple functions in multiple parts at the same time.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a gun barrel dehumidification grease spraying maintenance device, including a pressurizing device, an air pipe, an oil pipe, a heat exchange container and a heating device;

[0005] One end of the air pipe is connected to the pressurizing device, and the other end of the air pipe is provided with an air jet gun. The air pipe includes a heat exchange section, and the heat exchange section is located in the heat exchange container;

[0006] The heat exchange container is equipped with protective oil and a heating device. An air inlet connected to the pressurizing device is provided on the top of the heat exchange container. One end of the oil pipe is connected to the bottom of the heat exchange container, and an oil spray gun is provided at the other end of the oil pipe.

[0007] When in use, the heating device is started to heat the protective oil in the heat exchange container. Since the heat exchange section is located in the heat exchange container, the air passing through the heat exchange section will also be heated while the protective oil is heated.

[0008] The air compressor generates high-pressure airflow, part of which flows out through the air pipe. Due to the presence of the heat exchange section, the gas can be heated, so the gas ejected through the jet gun is high-speed hot air. The high-speed hot air can quickly evaporate the water vapor in the barrel. After the water vapor is completely evaporated, the oil spray gun is started, and another part of the high-pressure gas of the air compressor enters the heat exchange container through the air inlet. The air pressure in the heat exchange container rises, which can increase the boiling point of the protective oil and make it higher in temperature. On the other hand, the protective oil can be sprayed out from the oil pipe from the oil spray gun. The oil spray operation can be completed by aiming the oil spray gun at the barrel.

[0009] Preferably, the pressurizing device is an air compressor, which can quickly provide high-pressure airflow.

[0010] Preferably, the air compressor is provided with an output pipe, which is connected to the air pipe and the air inlet respectively, so as to supply air to the air pipe and the heat exchange container.

[0011] Preferably, a pressure gauge is provided at the end of the output pipe to detect the air pressure in the heat exchange container.

[0012] Preferably, the heat exchange section is a spiral structure or an S-shaped structure, so that the high-speed gas can have more time for heat exchange with the protective oil.

[0013] The heating device includes a temperature sensor, a heating resistor, and a regulating device for controlling the power of the heating resistor. The heating resistor is spirally arranged within the heat exchange container. The heating resistor heats the protective oil inside the container, and the temperature sensor can monitor the internal temperature in real time. The regulating device can reduce the power of the heating resistor after the temperature reaches the standard to avoid excessive heating. The spirally arranged heating resistor can provide a longer heating resistor for faster heating.

[0014] Preferably, the heat exchange container is a sealed device with a removable lid, so that a high pressure state can be formed inside to increase the temperature of the protective oil. Moreover, the increased pressure in the sealed space after heating can also provide power for the protective oil to be sprayed out from the oil spray gun.

[0015] Preferably, it also includes a stabilizing cylinder, the inner cavity of the stabilizing cylinder is for the nozzle of the oil spray gun or the air jet gun to pass through, and a number of centering limit frames are distributed on the periphery of the stabilizing cylinder, and the centering limit frame includes a sliding ring, a first rocker arm, a second rocker arm and a tension spring, the sliding ring is arranged on the outer shell of the stabilizing cylinder, and the sliding ring slides axially relative to the stabilizing cylinder, the stabilizing cylinder is provided with a fixed seat, and the fixed seat is fixed in the axial position relative to the stabilizing cylinder, and a spring is arranged on the outside of the stabilizing cylinder, one end of the spring is connected to the sliding ring, and the spring pushes the sliding ring to one side of the fixed seat, one end of the first rocker arm is hinged to the sliding ring, the other end of the second rocker arm is provided with a pulley, and the other end of the second rocker arm is hinged to the fixed seat, and the middle parts of the first rocker arm and the second rocker arm are hinged.

[0016] The first and second swing arms are hinged to the sliding ring and fixed seat, respectively, and a spring causes the sliding ring to slide toward the fixed seat. Therefore, when no external force is applied, the other ends of the first and second swing arms lean outward. Pulleys are provided at the other ends of the first and second swing arms, allowing them to easily push inward after contacting the inner wall of the gun barrel. Several pairs of new limit brackets allow the stabilizing barrel to be centrally positioned within the gun barrel. Once positioned, the air gun is inserted through the stabilizing barrel and extended to the front end. The air gun is then turned on to remove moisture from the interior, and then the oil gun is used to spray oil into the interior.

[0017] Preferably, the front section of the stabilizing cylinder is provided with a small-diameter section, the outer portion of the small-diameter section is rotatably engaged with a rotating cylinder, the sliding ring and the fixing seat are provided on the rotating cylinder, and the rotating cylinder is spline-engaged with the sliding ring; the front end of the small-diameter section is fixed with a limiting frame, and at least one camera is distributed on the periphery of the front end of the stabilizing cylinder, and the camera is provided on the limiting frame. The camera can observe the internal situation. The cooperation between the small-diameter section and the limiting frame can limit the axial position of the rotating cylinder so that the rotating cylinder can only rotate in a circular motion. When using a camera to observe the interior, if the camera coverage angle makes it impossible to view part of the interior, the angle can be adjusted by rotating the stabilizing cylinder. Similarly, the angle of the jet gun or the oil spray gun can be adjusted by rotating the stabilizing cylinder to provide more comprehensive coverage of the interior of the gun body.

[0018] Preferably, the front cover of the camera is provided with a transparent protective plate, and the front end of the rotating drum is provided with an external frame, which extends to one side of the transparent protective plate. The external frame is hingedly connected to a scraper, and the hinge of the scraper is provided with a torsion spring, which abuts the scraper against the outer surface of the transparent protective plate. The transparent protective plate can prevent oil stains from obscuring the camera's field of view. By providing the scraper on the outer surface of the transparent protective plate, the scraper does not rotate relative to the rotating drum. Therefore, when the stabilizing drum is rotated by the spray gun, the camera and the transparent protective plate can be driven to rotate. That is, the scraper rotates relative to the camera and the transparent protective plate, thereby achieving the purpose of clearing oil stains on the transparent protective plate.

[0019] Advantages of the present invention:

[0020] The present invention utilizes an air machine to provide power for both air jet and oil injection, and utilizes a heat exchange container to heat the protective oil on the one hand and the gas ejected outward on the other hand. The overall solution is highly integrated and cleverly utilizes the relationship between air jet and oil injection to achieve the effect of multiple functions in multiple parts at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only two of the drawings of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is a schematic diagram of an embodiment of the present invention;

[0023] Figure 2 is a schematic diagram of a stabilizing cylinder according to an embodiment of the present invention;

[0024] Among them, 1. Pressurizing device; 2. Heat exchange container; 3. Output pipe; 4. Pressure gauge; 5. Heat exchange section; 6. Heating resistor wire; 7. Temperature sensor; 8. Adjustment device; 9. Air pipe; 10. Oil pipe; 11. Air jet gun; 12. Oil spray gun; 13. Air inlet; 14. Stabilizing cylinder; 15. Rotating cylinder; 16. Sliding ring; 17. Spring; 18. Second rocker arm; 19. First rocker arm; 20. Pulley; 21. Camera; 22. External frame; 23. Scraper; 24. Fastening bolts. DETAILED DESCRIPTION

[0025] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0026] Example

[0027] like Figure 1 As shown, the gun barrel dehumidification and grease spraying maintenance device includes a pressurizing device 1, an air pipe 9, an oil pipe 10, a heat exchange container 2 and a heating device;

[0028] One end of the air pipe 9 is connected to the pressurizing device 1, and the other end of the air pipe 9 is provided with an air jet gun 11. The air pipe 9 includes a heat exchange section 5, and the heat exchange section 5 is located in the heat exchange container 2;

[0029] The heat exchange container 2 is equipped with protective oil and a heating device. The protective oil is protective oil specially used for artillery. An air inlet 13 connected to the pressurizing device 1 is provided at the top of the heat exchange container 2. One end of the oil pipe 10 is connected to the bottom of the heat exchange container 2, and an oil spray gun 12 is provided at the other end of the oil pipe 10.

[0030] When in use, the heating device is started to heat the protective oil in the heat exchange container 2. Since the heat exchange section 5 is located in the heat exchange container 2, the air passing through the heat exchange section 5 will also be heated while the protective oil is heated.

[0031] The air compressor generates a high-pressure air flow, part of which flows out through the air pipe 9. Due to the presence of the heat exchange section 5, the gas can be heated. Therefore, the gas ejected through the jet gun 11 is high-speed hot air. The high-speed hot air can quickly evaporate the water vapor in the barrel. After the water vapor is completely evaporated, the oil spray gun 12 is started, and another part of the high-pressure gas of the air compressor enters the heat exchange container 2 through the air inlet 13. The air pressure in the heat exchange container 2 rises. On the one hand, the boiling point of the protective oil can be increased to make it higher in temperature. On the other hand, the protective oil can be ejected from the oil pipe 10 from the oil spray gun 12. The oil spraying operation can be completed by aiming the oil spray gun 12 at the barrel.

[0032] The pressurizing device 1 is an air compressor, which can quickly provide high-pressure airflow.

[0033] The air compressor is provided with an output pipe 3 , which is connected to the air pipe 9 and the air inlet 13 , respectively, so as to supply air to the air pipe 9 and the heat exchange container 2 .

[0034] A pressure gauge 4 is provided at the end of the output pipe 3 to detect the air pressure in the heat exchange container 2.

[0035] The heat exchange section 5 is a spiral structure or an S-shaped structure so that the high-speed gas can have more time for heat exchange with the protective oil.

[0036] The heating device includes a heating resistor 6 and a temperature sensor 7. The internal protective oil is heated by the heating resistor 6, and the internal temperature can be monitored in real time by the temperature sensor 7. As required, the temperature of the protective oil is actually controlled at 100 degrees Celsius, while the temperature of the high-pressure gas is controlled within 130 degrees Celsius. That is, the temperature of the high-pressure gas is higher than that of the protective oil. To achieve this effect, the portion located at the top of the heat exchange container 2 is wound with the heating resistor 6 (as another practical embodiment, not shown in the figure). Because it is located at the top of the heat exchange container 2, it does not come into excessive contact with the protective oil. Instead, it mainly heats the high-pressure airflow. That is, the high-pressure airflow is heated by the protective oil on the one hand and by the heating resistor 6 on the other hand, so that the temperature of the high-pressure airflow is higher than that of the protective oil.

[0037] The system also includes a regulating device 8 for controlling the power of the heating resistor 6. This allows the power of the heating resistor 6 to be reduced after the temperature reaches a specified value, thereby preventing excessive heating. The regulating device 8 is electrically connected to the temperature sensor 7 and the pressure gauge 4. When any parameter of the temperature sensor 7 or the pressure gauge 4 reaches a specified value, the power of the resistor 6 is stopped or reduced, thereby preventing a continued increase in temperature and pressure.

[0038] The heating resistance wire 6 is spirally arranged in the heat exchange container 2. A longer heating resistance wire 6 can be provided to allow for faster heating.

[0039] The heat exchange container 2 is a sealed device with a removable lid. This creates a high pressure inside, raising the temperature of the protective oil. Furthermore, the increased pressure in the sealed space after heating also provides the power for spraying the protective oil from the oil spray gun 12. The heat exchange container 2 is a pressure cooker, with a lid secured by hooks on the outside. To prevent excessive internal pressure, a pressure relief valve is provided at the top of the heat exchange container 2.

[0040] In this embodiment, the air inlet 13 , the heat exchange section 5 , the heating resistor 6 and the oil pipe 10 all enter the interior of the heat exchange container 2 from the top.

[0041] Combine Figure 2As shown, it also includes a stabilizing cylinder 14, the inner cavity of the stabilizing cylinder 14 is for the nozzle of the oil spray gun 12 or the air jet gun 11 to pass through, and a number of centering limit frames are distributed on the periphery of the stabilizing cylinder 14, the centering limit frame includes a sliding ring 16, a first rocker arm 19, a second rocker arm 18 and a tension spring, the sliding ring 16 is outer-mounted on the stabilizing cylinder 14, the sliding ring 16 slides axially relative to the stabilizing cylinder 14, the stabilizing cylinder 14 is provided with a fixed seat, and the fixed seat is fixed in the axial position relative to the stabilizing cylinder 14, the outside of the stabilizing cylinder 14 is provided with a spring 17, one end of the spring 17 is connected to the sliding ring 16, and the spring 17 pushes the sliding ring 16 toward one side of the fixed seat, one end of the first rocker arm 19 is hinged to the sliding ring 16, the other end of the second rocker arm 18 is provided with a pulley 20, the other end of the second rocker arm 18 is hinged to the fixed seat, and the middle parts of the first rocker arm 19 and the second rocker arm 18 are hinged.

[0042] A fastening bolt 24 is radially provided on the side wall of the stabilizing cylinder 14, and the front end of the fastening bolt 24 extends to the interior of the stabilizing cylinder 14. When the nozzle at the front end of the spray gun is fitted into the stabilizing cylinder 14, the fastening bolt 24 can be pressed against the nozzle at the front end of the spray gun to lock the relative position of the nozzle of the spray gun and the stabilizing cylinder 14, so as to control the stabilizing cylinder to enter and exit the barrel through the spray gun.

[0043] The nozzle of the spray gun in this embodiment is a hollow heat-resistant glass fiber reinforced plastic tube to ensure that it has the necessary strength, is lighter in weight, and has a length of at least 7 meters.

[0044] The first and second rocker arms 19 and 18 are hinged to the sliding ring 16 and the fixed seat, respectively, and the spring 17 causes the sliding ring 16 to slide toward the fixed seat. Therefore, when no external force is applied, the other ends of the first and second rocker arms 19 and 18 abut outward. Because pulleys 20 are provided at the other ends of the first and second rocker arms 19 and 18, they can be easily pushed inward after contacting the inner wall of the gun barrel. Using several pairs of new limit brackets, the stabilizing tube 14 can be centrally placed within the gun barrel. Once the position is determined, the spray gun 11 is first inserted through the stabilizing tube 14 and extended to the front end of the stabilizing tube 14. The spray gun 11 is then turned on to remove moisture from the interior. Then, the oil spray gun 12 is used to spray oil into the interior.

[0045] At least one camera 21 is located around the front of the stabilizer tube 14 to monitor the internal situation. However, according to common knowledge, in order to view the camera feed in real time, a quick-connect connector, such as a USB connector, or an output module is required to connect to the camera circuitry, allowing viewing on a mobile phone or computer.

[0046] The front section of the stabilizing barrel 14 is provided with a small-diameter section. The outer portion of the small-diameter section is rotatably engaged with the rotating barrel 15. The front end of the small-diameter section is fixed to a limit bracket. The camera 21 is mounted on the limit bracket. The sliding ring 16 and the fixing seat are mounted on the rotating barrel 15. The rotating barrel 15 and the sliding ring 16 are spline-engaged. The cooperation between the small-diameter section and the limit bracket can axially limit the rotating barrel 15, so that the rotating barrel 15 can only rotate in a circular manner. When using the camera 21 to observe the interior, if the camera 21's coverage angle makes it impossible to see part of the interior, the angle can be adjusted by rotating the stabilizing barrel 14. Similarly, the angle of the air jet 11 or the oil spray gun 12 can be adjusted by rotating the stabilizing barrel 14, thereby providing more comprehensive coverage of the interior of the gun barrel.

[0047] The front of the camera 21 is covered with a transparent protective plate. The front end of the rotating drum 15 is provided with an external frame 22, which extends to one side of the transparent protective plate. The external frame 22 is hingedly connected to a scraper 23. The hinge of the scraper 23 is provided with a torsion spring, which abuts the scraper 23 against the outer surface of the transparent protective plate. The transparent protective plate prevents oil stains from obscuring the camera 21's field of view. By providing the scraper 23 on the outer surface of the transparent protective plate, the scraper 23 does not rotate relative to the rotating drum 15. Therefore, when the stabilizing drum 14 is rotated by the spray gun, the camera 21 and the transparent protective plate can be rotated. That is, the scraper rotates relative to the camera 21 and the transparent protective plate, thereby clearing the oil stains on the transparent protective plate.

[0048] Advantages of the present invention:

[0049] The present invention utilizes an air machine to simultaneously provide power for air jet and oil injection, and utilizes the heat exchange container 2 to heat the protective oil on the one hand and heat the gas ejected outward on the other hand. The overall solution is highly integrated and cleverly utilizes the relationship between air jet and oil injection to achieve the effect of multiple functions in multiple places at the same time.

[0050] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A gun barrel dehumidification and grease spraying maintenance device, characterized in that: It comprises a pressurizing device (1), an air pipe (9), an oil pipe (10), a heat exchange container (2) and a heating device; One end of the air pipe (9) is in communication with the pressurizing device (1), and an air jet gun (11) is provided at the other end of the air pipe (9). The air pipe (9) includes a heat exchange section (5), and the heat exchange section (5) is located in the heat exchange container (2); The heat exchange container (2) is equipped with protective oil and a heating device. An air inlet (13) connected to the pressurizing device (1) is provided at the top of the heat exchange container (2). One end of the oil pipe (10) is connected to the bottom of the heat exchange container (2). An oil spray gun (12) is provided at the other end of the oil pipe (10). The invention also includes a stabilizing cylinder (14), the inner cavity of which is provided for the nozzle of the oil spray gun (12) or the air jet gun (11) to pass through, and a plurality of centering limit frames are distributed on the periphery of the stabilizing cylinder (14), the centering limit frames include a sliding ring (16), a first rocker (19), a second rocker (18) and a tension spring, the outer shell of the stabilizing cylinder (14) is provided with the sliding ring (16), the sliding ring (16) is axially slidably matched with the stabilizing cylinder (14), and the stabilizing cylinder (14) is provided with a fixed seat, and the fixed seat is relative to the stabilizing cylinder (14). The axial position of the fixed cylinder (14) is fixed. A spring (17) is sleeved on the outside of the stabilizing cylinder (14). One end of the spring (17) is connected to the sliding ring (16). The spring (17) pushes the sliding ring (16) toward one side of the fixed seat. One end of the first rocker (19) is hinged to the sliding ring (16). The other end of the second rocker (18) is provided with a pulley (20). The other end of the second rocker (18) is hinged to the fixed seat. The middle parts of the first rocker (19) and the second rocker (18) are hinged. The front section of the stabilizing cylinder (14) is provided with a small-diameter section, the outside of the small-diameter section is rotatably matched with a rotating cylinder (15), the sliding ring (16) and the fixing seat are provided on the rotating cylinder (15), and the rotating cylinder (15) and the sliding ring (16) are spline-matched; the front end of the small-diameter section is fixed with a limiting frame, and at least one camera (21) is distributed on the periphery of the front end of the stabilizing cylinder (14), and the camera (21) is provided on the limiting frame.

2. The gun barrel dehumidification and grease spraying maintenance device according to claim 1 is characterized in that: The pressurizing device (1) is an air compressor.

3. The gun barrel dehumidification and grease spraying maintenance device according to claim 2, characterized in that: The air compressor is provided with an output pipe (3) extending outwards, and the output pipe (3) is respectively connected to the air pipe (9) and the air inlet (13).

4. The gun barrel dehumidification and grease spraying maintenance device according to claim 3 is characterized in that: A pressure gauge (4) is provided at the end of the output pipe (3).

5. The gun barrel dehumidification and grease spraying maintenance device according to claim 1 is characterized in that: The heat exchange section (5) is a spiral structure or an S-shaped structure.

6. The gun barrel dehumidification and grease spraying maintenance device according to claim 1, characterized in that: The heating device comprises a temperature sensor (7), a heating resistance wire (6), and a regulating device (8) for controlling the power of the heating resistance wire (6); the heating resistance wire (6) is spirally arranged in the heat exchange container (2).

7. The gun barrel dehumidification and grease spraying maintenance device according to claim 1, characterized in that: The heat exchange container (2) is a sealing device with a removable cover.

8. The gun barrel dehumidification and grease spraying maintenance device according to claim 1, characterized in that: The front cover of the camera (21) is provided with a transparent protective plate, the front end of the rotating drum (15) is provided with an outer frame (22), the outer frame (22) extends to one side of the transparent protective plate, the outer frame (22) is hinged with a scraper (23), and a torsion spring is provided at the hinge of the scraper (23), and the torsion spring presses the scraper (23) against the outer surface of the transparent protective plate.

Citation Information

Patent Citations

  • Dehumidifying and grease spraying maintenance device for artillery bore

    CN219914166U