Shock wave eliminating ventilating duct

Abstract

The invention discloses a shock wave eliminating ventilating duct, and relates to the technical field of shock wave elimination, the shock wave eliminating ventilating duct comprises a ventilating pipe assembly and a control assembly, the ventilating pipe assembly comprises a first ventilating pipe, a second ventilating pipe, an inner pipe and foamed aluminum, the first ventilating pipe is communicated with the second ventilating pipe, and the inner part of the first ventilating pipe is slidably connected with the outer wall of the inner pipe; foamed aluminum is arranged on the inner walls of the second ventilation pipe and the inner pipe respectively; the control assembly comprises a fixed pipe and a movable rod, one end of the fixed pipe is fixedly connected with the inner end wall of the first ventilation pipe, and the movable rod is slidably connected with the inner wall of the other end of the fixed pipe and fixedly connected with the inner pipe. The movable rod drives the inner pipe to slide to the position of the second ventilation pipe on the inner wall of the first ventilation pipe, the connecting part of the second ventilation pipe and the first ventilation pipe is shielded, and therefore the first ventilation pipe and the second ventilation pipe are separated, shock waves generated by explosion are prevented from spreading along the pipeline, damage to equipment arranged on the pipeline is avoided, and the protection effect is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of shock wave elimination, in particular to a shock wave elimination ventilation duct. Background Art

[0002] In the underground protection project of the position project, explosion-proof rooms are usually set up. The explosion-proof rooms can mainly divide the rooms in the protection project into two categories: air supply rooms and exhaust rooms. The air supply room is a place where personnel live and work, such as the combat command room, office, lounge, conference room, etc., which has high requirements for air hygiene standards and needs to be supplied with fresh air or air with a certain temperature and humidity after air conditioning. The exhaust room refers to a room that continuously produces odor or harmful substances, such as toilets, kitchens, reservoirs, washrooms, sewage pump rooms, battery rooms, etc. In order to prevent the harmful gases generated in the exhaust room from spreading to other rooms, the air used in the air supply room can be discharged to the outside of the project in an orderly manner through these exhaust rooms. The ventilation and air conditioning system of the protection project is composed of an air intake system, an exhaust system, an air conditioning air supply system, and a return air system. The air intake system transports fresh air from the outside of the project to the inside of the project to meet the breathing needs of personnel and equipment.

[0003] At present, the fans, gas filters or air conditioners in the existing air supply rooms and exhaust rooms are directly connected through pipes. When encountering explosives outside the protective project, the shock wave generated by the explosion will propagate along the pipe, causing damage to the equipment installed on the pipe and affecting its use. Therefore, it is necessary to eliminate the shock wave inside the pipe and improve the protection of the equipment installed on the pipe. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the fans, gas filters or air conditioners in the existing air supply rooms and exhaust rooms are directly connected through pipes. When encountering explosives outside the protective project, the shock wave generated by the explosion will propagate along the pipes, causing damage to the equipment installed on the pipes and affecting their use.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a shock wave elimination ventilation duct, which includes a ventilation pipe assembly and a control assembly, the ventilation pipe assembly includes a first ventilation pipe, a second ventilation pipe, an inner pipe and foam aluminum, the first ventilation pipe is connected to the second ventilation pipe, the first ventilation pipe is slidably connected to the outer wall of the inner pipe, and the second ventilation pipe and the inner wall of the inner pipe are respectively provided with foam aluminum; the control assembly includes a fixed pipe and a movable rod, one end of the fixed pipe is fixedly connected to the inner end wall of the first ventilation pipe, the inner wall of the other end of the fixed pipe is slidably connected to the movable rod, and the movable rod is fixedly connected to the inner pipe.

[0006] As a preferred solution of the shock wave elimination ventilation duct described in the present invention, the control component also includes a control part, which includes a hollow ring, an air intake pipe, a fixed cylinder, a limit shaft, a first piston head and a fixed column, one end of the fixed column is fixedly connected to the movable rod, the other end of the fixed column is fixedly connected to the first piston head, the first piston head is slidably connected to the inner wall of the fixed tube, the fixed column is provided with a socket, the hollow ring is fixedly connected to the top of the fixed tube, one end of the air intake pipe is connected to the hollow ring, the fixed tube is fixedly connected to the fixed cylinder, the fixed cylinder is provided with a first through hole, the inner wall of the fixed cylinder is slidably connected to the limit shaft, the limit shaft is arranged corresponding to the socket, the inside of the limit shaft is hollow, and the limit shaft is provided with a second through hole.

[0007] As a preferred solution of the shock wave elimination ventilation duct described in the present invention, the control component also includes a locking piece, and the locking piece includes a first fixed ring, a second fixed ring, a limiting cylinder and a movable tube, the first fixed ring and the second fixed ring are respectively fixedly connected to the inner wall of the fixed cylinder, the limiting shaft is fixedly connected to the limiting cylinder, and the inner wall of the limiting cylinder is slidably connected to the movable tube.

[0008] As a preferred solution of the shock wave eliminating ventilation duct described in the present invention, the control component also includes a driving part, which includes a motor, a screw, a fixed shaft and a second piston head. The motor is connected to one end of the screw, the screw is threadedly connected to the fixed shaft, an inner cavity is arranged inside the fixed shaft, the outer wall of the fixed shaft is fixedly connected to the limiting shaft, the end of the screw away from the motor is fixedly connected to the second piston head, and the second piston head is slidably connected to the inner wall of the inner cavity.

[0009] As a preferred solution of the shock wave elimination ventilation duct of the present invention, the inner cavity is connected to the limiting cylinder through a third through hole.

[0010] As a preferred solution of the shock wave elimination ventilation duct described in the present invention, a spring is arranged inside the limiting cylinder, one end of the spring is fixedly connected to the third piston head, the third piston head is slidably connected to the inner wall of the limiting cylinder, and the third piston head is fixedly connected to the movable tube.

[0011] As a preferred solution of the shock wave elimination ventilation duct of the present invention, the limiting shaft is fixedly connected to a sliding rod, and the sliding rod passes through a fixing tube.

[0012] As a preferred solution of the shock wave elimination ventilation duct of the present invention, the motor is fixedly connected to the motor base, and the motor base is fixedly connected to the fixing cylinder.

[0013] As a preferred solution of the shock wave elimination ventilation duct described in the present invention, wherein: the inner wall of the first fixing ring is fixedly connected to the first sealing ring, and the inner wall of the first sealing ring is slidably connected to the limiting shaft; the inner wall of the second fixing ring is fixedly connected to the second sealing ring, and the inner wall of the second sealing ring is slidably connected to the limiting shaft.

[0014] As a preferred solution of the shock wave elimination ventilation duct of the present invention, an air outlet is provided on the fixed pipe.

[0015] Beneficial effects of the present invention: The present invention controls the movable rod to slide and retract on the inner wall of the fixed pipe. The movable rod drives the inner pipe to slide on the inner wall of the first ventilation pipe to the position of the second ventilation pipe, and the connecting part between the second ventilation pipe and the first ventilation pipe is blocked, thereby isolating the first ventilation pipe and the second ventilation pipe, avoiding the shock wave generated by the explosion from propagating along the pipe and causing damage to the equipment installed on the pipe, thereby playing a protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the present disclosure.

[0017] Figure 2 Schematic diagram of the control component structure in the embodiment of the present disclosure.

[0018] Figure 3 It is a cross-sectional view of a fixed pipe in an embodiment of the present disclosure.

[0019] Figure 4 It is a schematic diagram of the fixed column structure in the embodiment of the present disclosure.

[0020] Figure 5 It is a cross-sectional view of the fixing cylinder in the embodiment of the present disclosure.

[0021] Figure 6 In the embodiment of the present disclosure Figure 5 Enlarged schematic diagram at point A in the middle.

[0022] Figure 7 It is a cross-sectional view of the limited axis in the embodiment of the present disclosure.

[0023] Figure 8 It is a cross-sectional view of the limiting cylinder in the embodiment of the present disclosure.

[0024] Figure markings: ventilation pipe assembly 1, first ventilation pipe 11, second ventilation pipe 12, inner pipe 13, foam aluminum 14, control assembly 2, fixed pipe 21, air outlet 211, movable rod 22, control member 23, hollow ring 231, air inlet pipe 232, fixed cylinder 233, first through hole 2331, limiting shaft 234, second through hole 2341, first piston head 235, fixed column 236, jack 2361, locking member 24, first fixing ring 241, first sealing ring 2411, second fixing ring 242, second sealing ring 2421, limiting cylinder 243, spring 2431, third piston head 2432, movable pipe 244, driving member 25, motor 251, motor seat 2511, screw rod 252, fixed shaft 253, inner cavity 2531, third through hole 2532, second piston head 254. Implementation

[0025] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings. Example

[0026] Reference Figure 1 and Figure 2 This embodiment provides a shock wave elimination ventilation duct, which includes a ventilation pipe assembly 1 and a control assembly 2. The ventilation pipe assembly 1 includes a first ventilation pipe 11, a second ventilation pipe 12, an inner pipe 13 and foam aluminum 14. The first ventilation pipe 11 is connected to the second ventilation pipe 12. The first ventilation pipe 11 is slidably connected to the outer wall of the inner pipe 13. The inner walls of the second ventilation pipe 12 and the inner pipe 13 are respectively provided with foam aluminum 14.

[0027] In this embodiment, the foamed aluminum 14 on the inner wall of the second ventilation pipe 12 and the inner pipe 13 can play a wave-breaking role on the impact force generated by the explosion, and the inner pipe 13 can slide inside the first ventilation pipe 11. When the protection project receives an early warning, the inner pipe 13 slides to the position of the second ventilation pipe 12, shielding the connection between the second ventilation pipe 12 and the first ventilation pipe 11, thereby isolating the first ventilation pipe 11 and the second ventilation pipe 12, and the foamed aluminum 14 on the inner wall of the inner pipe 13 can play a wave-breaking role on the impact force generated by the explosion, preventing the shock wave generated by the explosion from propagating along the pipeline and causing damage to the equipment installed on the pipeline, thereby playing a protective role.

[0028] The control assembly 2 includes a fixed tube 21 and a movable rod 22 . One end of the fixed tube 21 is fixedly connected to the inner end wall of the first ventilation tube 11 , and the inner wall of the other end of the fixed tube 21 is slidably connected to the movable rod 22 . The movable rod 22 is fixedly connected to the inner tube 13 .

[0029] Preferably in this embodiment, the movable rod 22 can slide and retract on the inner wall of the fixed tube 21. When the movable rod 22 moves, it can drive the inner tube 13 to slide on the inner wall of the first ventilation tube 11. The fixed tube 21 and the movable rod 22 are provided in only one group, which is conducive to more stable sliding of the inner tube 13.

[0030] When in use, by controlling the movable rod 22 to slide and retract on the inner wall of the fixed tube 21, the movable rod 22 drives the inner tube 13 to slide on the inner wall of the first ventilation tube 11 to the position of the second ventilation tube 12, and the connecting part of the second ventilation tube 12 and the first ventilation tube 11 is blocked, thereby separating the first ventilation tube 11 from the second ventilation tube 12, and the foam aluminum 14 on the inner wall of the inner tube 13 can play a wave-breaking role in the impact force generated by the explosion, avoiding the shock wave generated by the explosion from propagating along the pipeline and causing damage to the equipment installed on the pipeline, thus playing a protective role. Normally, the inner tube 13 is Figure 1The middle position can be ventilated normally at this time. If there is no time to close the first ventilation pipe 11 in case of an emergency, the second ventilation pipe 12 and the foamed aluminum 14 on the inner wall of the inner pipe 13 can play a wave-absorbing role on the impact force generated by the explosion. Example

[0031] Reference Figures 1 to 8 This embodiment is based on the previous embodiment, and differs from the previous embodiment in that.

[0032] Reference Figures 2 to 5 The control assembly 2 also includes a control member 23, which includes a hollow ring 231, an air intake pipe 232, a fixed cylinder 233, a limiting shaft 234, a first piston head 235 and a fixed column 236, one end of the fixed column 236 is fixedly connected to the movable rod 22, and the other end of the fixed column 236 is fixedly connected to the first piston head 235, and the first piston head 235 is slidably connected to the inner wall of the fixed pipe 21, and a socket 2361 is provided on the fixed column 236, the hollow ring 231 is fixedly connected to the top of the fixed pipe 21, one end of the air intake pipe 232 is connected to the hollow ring 231, and the fixed pipe 21 is fixedly connected to the fixed cylinder 233, and the fixed cylinder 233 is provided with a first through hole 2331, and the inner wall of the fixed cylinder 233 is slidably connected to the limiting shaft 234, and the limiting shaft 234 is arranged corresponding to the socket 2361, the limiting shaft 234 is hollow inside, and the limiting shaft 234 is provided with a second through hole 2341.

[0033] In this embodiment, the fixed column 236 can connect the first piston head 235 and the movable rod 22, so that the fixed column 236, the first piston head 235 and the movable rod 22 form a whole, and the first piston head 235 can drive the fixed column 236 and the movable rod 22 to move when sliding on the inner wall of the fixed tube 21. The size of the socket 2361 is larger than the limit shaft 234. When the limit shaft 234 is inserted into the socket 2361, the position of the fixed column 236 can be locked. At this time, the fixed column 236, the first piston head 235 and the movable rod 22 cannot move. The intake pipe 232 is connected to the inside of the hollow ring 231, the inside of the fixed cylinder 233 is connected to the inside of the hollow ring 231 through the first through hole 2331, the inside of the limit shaft 234 is connected to the inside of the fixed cylinder 233 through the second through hole 2341, and the inside of the limit shaft 234 is connected to the fixed tube 21.

[0034] First, control the limit shaft 234 to be inserted into the socket 2361. At this time, the fixed column 236, the first piston head 235 and the movable rod 22 cannot move. Then connect the existing air pump with the intake pipe 232, and pump the gas into the intake pipe 232. Then the gas passes through the hollow ring 231, the first through hole 2331, the fixed cylinder 233, the second through hole 2341 and the limit shaft 234 in turn into the interior of the fixed tube 21. When in use, the control limit shaft 234 is pulled out from the socket 2361, and under the action of the air pressure above the first piston head 235 inside the fixed tube 21, the first piston head 235 is quickly pushed downward, and the first piston head 235 can drive the fixed column 236 and the movable rod 22 to move downward when sliding on the inner wall of the fixed tube 21, and the movable rod 22 retracts into the fixed tube 21, and the movable rod 22 drives the inner tube 13 to slide on the inner wall of the first ventilation pipe 11 to the position of the second ventilation pipe 12, and the connecting part of the second ventilation pipe 12 and the first ventilation pipe 11 is blocked, thereby separating the first ventilation pipe 11 from the second ventilation pipe 12, and the foam aluminum 14 on the inner wall of the inner tube 13 can play a wave-breaking role in the impact force generated by the explosion, thereby preventing the shock wave generated by the explosion from propagating along the pipeline and causing damage to the equipment installed on the pipeline, thereby playing a protective role.

[0035] Reference Figure 5 The control component 2 also includes a locking piece 24, which includes a first fixing ring 241, a second fixing ring 242, a limiting cylinder 243 and a movable tube 244. The first fixing ring 241 and the second fixing ring 242 are respectively fixedly connected to the inner wall of the fixing cylinder 233, the limiting shaft 234 is fixedly connected to the limiting cylinder 243, and the inner wall of the limiting cylinder 243 is slidably connected to the movable tube 244.

[0036] In this embodiment, the first fixing ring 241 and the second fixing ring 242 can limit the limiting shaft 234, thereby improving the stability of the limiting shaft 234 when it moves. Figure 5 The left side of the second fixing ring 242, at this time the limit shaft 234 cannot move Figure 5 The right side of the second fixing ring 242 slides to prevent the limiting shaft 234 from being pulled out of the insertion hole 2361 to avoid false triggering.

[0037] Reference Figures 5 to 7 The control component 2 also includes a driving member 25, which includes a motor 251, a screw rod 252, a fixed shaft 253 and a second piston head 254. The motor 251 is connected to one end of the screw rod 252, the screw rod 252 is threadedly connected to the fixed shaft 253, an inner cavity 2531 is arranged inside the fixed shaft 253, the outer wall of the fixed shaft 253 is fixedly connected to the limiting shaft 234, the end of the screw rod 252 away from the motor 251 is fixedly connected to the second piston head 254, and the second piston head 254 is slidably connected to the inner wall of the inner cavity 2531.

[0038] In this embodiment, the motor 251 is preferably capable of driving the screw rod 252 to rotate when working, and the screw rod 252 can drive the fixed shaft 253 to move through the action of the thread, and the fixed shaft 253 drives the limiting shaft 234 to move, so that the limiting shaft 234 is inserted into or pulled out of the insertion hole 2361. When the second piston head 254 is close to the position of the limiting cylinder 243, the second piston head 254 compresses the gas inside the inner cavity 2531 and presses the gas into the limiting cylinder 243, and at this time the movable tube 244 extends out.

[0039] Reference Figure 7 The inner cavity 2531 is connected to the limiting cylinder 243 through the third through hole 2532.

[0040] Preferably, in this embodiment, when the second piston head 254 is close to the position of the limiting cylinder 243, the second piston head 254 compresses the air pressure inside the inner cavity 2531, and the air enters the limiting cylinder 243 through the third through hole 2532. The air in the limiting cylinder 243 can also enter the inner cavity 2531 through the third through hole 2532.

[0041] Reference Figure 5 and Figure 8 A spring 2431 is arranged inside the limiting cylinder 243 , one end of the spring 2431 is fixedly connected to the third piston head 2432 , the third piston head 2432 is slidably connected to the inner wall of the limiting cylinder 243 , and the third piston head 2432 is fixedly connected to the movable tube 244 .

[0042] In this embodiment, preferably, when the second piston head 254 is close to the position of the limiting cylinder 243, the second piston head 254 compresses the gas inside the inner cavity 2531, and the gas enters the limiting cylinder 243 through the third through hole 2532. Due to the tension of the spring 2431, the movable tube 244 does not immediately extend from the limiting cylinder 243. Only when the air pressure inside the inner cavity 2531 is greater than the tension of the spring 2431, the movable tube 244 will extend from the limiting cylinder 243, and the movable tube 244 will be stuck in the Figure 5 The left side of the second fixing ring 242, at this time the limit shaft 234 cannot move Figure 5 The right side of the second fixing ring 242 slides to prevent the limiting shaft 234 from being pulled out of the insertion hole 2361 to avoid false triggering.

[0043] Reference Figure 5 and Figure 6 The limiting shaft 234 is fixedly connected to the sliding rod 26 , and the sliding rod 26 passes through the fixing tube 233 .

[0044] In this embodiment, preferably, when the limiting shaft 234 moves, it drives the sliding rod 26 to move, and the sliding rod 26 slides through the fixed tube 233. The sliding rod 26 can limit the limiting shaft 234 to prevent relative rotation between the limiting shaft 234 and the fixed tube 233.

[0045] Reference Figure 6 The motor 251 is fixedly connected to the motor base 2511 , and the motor base 2511 is fixedly connected to the fixing cylinder 233 .

[0046] In this embodiment, preferably, the motor base 2511 can fix the motor 251 .

[0047] Reference Figure 5 The inner wall of the first fixing ring 241 is fixedly connected to the first sealing ring 2411 , and the inner wall of the first sealing ring 2411 is slidably connected to the limiting shaft 234 ; the inner wall of the second fixing ring 242 is fixedly connected to the second sealing ring 2421 , and the inner wall of the second sealing ring 2421 is slidably connected to the limiting shaft 234 .

[0048] Preferably, in this embodiment, the first sealing ring 2411 and the second sealing ring 2421 can seal the outer wall of the limiting shaft 234 .

[0049] Reference Figure 2 The fixed tube 21 is provided with an air outlet 211 .

[0050] Preferably in this embodiment, when the first piston head 235 moves downward on the inner wall xi of the fixed tube 21, the first piston head 235 drives the fixed column 236 and the movable rod 22 to move downward, and the movable rod 22 retracts into the fixed tube 21. The air outlet 211 can release the gas below the first piston head 235 in the fixed tube 21, so that the first piston head 235 moves downward more quickly, speeding up the speed of isolating the first ventilation pipe 11 and the second ventilation pipe 12, and improving the protection capability of the equipment installed on the pipeline.

[0051] First, pre-set, start the motor 251, the motor 251 drives the screw rod 252 to rotate forward, the screw rod 252 drives the fixed shaft 253 to move, the fixed shaft 253 drives the limit shaft 234 to move, and a part of the limit shaft 234 is inserted into the jack 2361. At this time, the second through hole 2341 is located on the right side of the second fixing ring 242, and the second piston head 254 is also close to the position of the limit cylinder 243. The second piston head 254 compresses the gas inside the inner cavity 2531, and the gas enters the limit cylinder 243 through the third through hole 2532. At this time, due to the tension of the spring 2431, the gas enters the limit cylinder 243. The movable tube 244 does not immediately extend from the limiting tube 243 due to the force. At this time, the motor 251 can be turned off first. Since the limiting shaft 234 is inserted into the socket 2361, the fixed column 236, the first piston head 235 and the movable rod 22 cannot move. Then the existing air pump is connected to the air inlet pipe 232, and the gas can be pumped into the air inlet pipe 232. Then the gas passes through the hollow ring 231, the first through hole 2331, the fixed tube 233, the second through hole 2341 and the limiting shaft 234 in turn into the fixed tube 21. When the air pressure reaches a predetermined value, the air inlet pipe 232 is closed.

[0052] The motor 251 is started again, the motor 251 drives the screw rod 252 to rotate forward, the screw rod 252 drives the fixed shaft 253 to move, the fixed shaft 253 drives the limit shaft 234 to move, and the limit shaft 234 is inserted into the insertion hole 2361. At this time, the second through hole 2341 is located at Figure 5 The first sealing ring 2411 and the second sealing ring 2421 can seal the outer wall of the limiting shaft 234, preventing the air in the second through hole 2341 from entering the fixed cylinder 233 on the right side of the second fixing ring 242, resulting in a decrease in the air pressure above the first piston head 235 inside the fixed tube 21; at this time, the second piston head 254 is closer to the position of the limiting cylinder 243, and the second piston head 254 compresses the gas inside the inner cavity 2531 and presses the gas into the limiting cylinder 243. The air pressure inside the inner cavity 2531 is greater than the pulling force of the spring 2431, and the movable tube 244 extends out at this time; the movable tube 244 is located at Figure 5 The left side of the second fixing ring 242, at this time the limit shaft 234 cannot move Figure 5 The right side of the second fixing ring 242 slides to prevent the limiting shaft 234 from being pulled out of the insertion hole 2361, thereby avoiding false triggering and completing the pre-setting.

[0053] When in use, the motor 251 is started, and the motor 251 drives the screw rod 252 to rotate in the opposite direction. At this time, the second piston head 254 is away from the position of the limit cylinder 243, and the air pressure inside the inner cavity 2531 is less than the tension of the spring 2431. At this time, the movable tube 244 is retracted, and the movable tube 244 releases the lock on the position of the limit shaft 234, and the movable tube 244 can continue to move forward. Figure 5The second fixing ring 242 in the middle slides on the right side until the limiting shaft 234 is pulled out from the socket 2361, and the first piston head 235 is quickly pushed downward under the action of the air pressure above the first piston head 235 inside the fixed tube 21. When the first piston head 235 slides on the inner wall of the fixed tube 21, it can drive the fixing column 236 and the movable rod 22 to move downward rapidly, and the movable rod 22 retracts into the fixed tube 21. The movable rod 22 drives the inner tube 13 to slide on the inner wall of the first ventilation pipe 11 to the position of the second ventilation pipe 12, and the connecting part of the second ventilation pipe 12 and the first ventilation pipe 11 is blocked, thereby separating the first ventilation pipe 11 from the second ventilation pipe 12, and the foam aluminum 14 on the inner wall of the inner tube 13 can play a wave-breaking role in the impact force generated by the explosion, thereby preventing the shock wave generated by the explosion from propagating along the pipeline and causing damage to the equipment installed on the pipeline, thereby playing a protective role.

[0054] By introducing gas into the fixed tube 21 in advance, a micro motor can be used to stimulate the movable rod 22 to retract into the fixed tube 21 during use. The micro motor only needs a very small battery to meet the power supply requirement, and the connecting part between the second ventilation tube 12 and the first ventilation tube 11 is blocked, thereby separating the first ventilation tube 11 and the second ventilation tube 12. This can not only increase the speed of separating the second ventilation tube 12 from the first ventilation tube 11 and improve the protection capability, but also reduce the arrangement of pipelines, making it exist as an independent unit, reducing the arrangement of pipelines during use, and reducing dependence on the surrounding environment. After completing the pre-setting, it can still be used normally when the external power supply is cut off, meeting the extreme environment in wartime.

Claims

1. A shock wave elimination ventilation duct, characterized in that: include A ventilation pipe assembly (1), the ventilation pipe assembly (1) comprising a first ventilation pipe (11), a second ventilation pipe (12), an inner pipe (13) and foamed aluminum (14), the first ventilation pipe (11) being connected to the second ventilation pipe (12), the interior of the first ventilation pipe (11) being slidably connected to the outer wall of the inner pipe (13), and the inner walls of the second ventilation pipe (12) and the inner pipe (13) being respectively provided with foamed aluminum (14); A control assembly (2), the control assembly (2) comprising a fixed tube (21) and a movable rod (22), one end of the fixed tube (21) being fixedly connected to the inner end wall of the first ventilation tube (11), the inner wall of the other end of the fixed tube (21) being slidably connected to the movable rod (22), and the movable rod (22) being fixedly connected to the inner tube (13).

2. The shock wave elimination ventilation duct according to claim 1, characterized in that: The control assembly (2) further comprises a control member (23), the control member (23) comprising a hollow ring (231), an air inlet pipe (232), a fixed tube (233), a limit shaft (234), a first piston head (235) and a fixed column (236), one end of the fixed column (236) being fixedly connected to the movable rod (22), the other end of the fixed column (236) being fixedly connected to the first piston head (235), the first piston head (235) being slidably connected to the inner wall of the fixed tube (21), and a plug is provided on the fixed column (236). The hollow ring (231) is fixedly connected to the top of the fixed tube (21); one end of the air inlet pipe (232) is connected to the hollow ring (231); the fixed tube (21) is fixedly connected to the fixed cylinder (233); the fixed cylinder (233) is provided with a first through hole (2331); the inner wall of the fixed cylinder (233) is slidably connected to the limiting shaft (234); the limiting shaft (234) is provided corresponding to the insertion hole (2361); the limiting shaft (234) is hollow inside; and the limiting shaft (234) is provided with a second through hole (2341).

3. The shock wave elimination ventilation duct according to claim 2, characterized in that: The control assembly (2) further comprises a locking member (24), the locking member (24) comprising a first fixing ring (241), a second fixing ring (242), a limiting cylinder (243) and a movable tube (244), the first fixing ring (241) and the second fixing ring (242) being respectively fixedly connected to the inner wall of the fixing cylinder (233), the limiting shaft (234) being fixedly connected to the limiting cylinder (243), and the inner wall of the limiting cylinder (243) being slidably connected to the movable tube (244).

4. The shock wave elimination ventilation duct according to claim 3, characterized in that: The control assembly (2) further comprises a driving member (25), the driving member (25) comprising a motor (251), a screw rod (252), a fixed shaft (253) and a second piston head (254), the motor (251) being connected to one end of the screw rod (252), the screw rod (252) being threadedly connected to the fixed shaft (253), an inner cavity (2531) being provided inside the fixed shaft (253), an outer wall of the fixed shaft (253) being fixedly connected to the limit shaft (234), an end of the screw rod (252) away from the motor (251) being fixedly connected to the second piston head (254), and the second piston head (254) being slidably connected to the inner wall of the inner cavity (2531).

5. The shock wave absorbing ventilation duct according to claim 4, characterized in that: The inner cavity (2531) is connected to the limiting cylinder (243) via the third through hole (2532).

6. The shock wave absorbing ventilation duct according to claim 4, characterized in that: A spring (2431) is arranged inside the limiting cylinder (243), one end of the spring (2431) is fixedly connected to the third piston head (2432), the third piston head (2432) is slidably connected to the inner wall of the limiting cylinder (243), and the third piston head (2432) is fixedly connected to the movable tube (244).

7. The shock wave absorbing ventilation duct according to claim 2, characterized in that: The limiting shaft (234) is fixedly connected to the sliding rod (26), and the sliding rod (26) passes through the fixing tube (233).

8. The shock wave absorbing ventilation duct according to claim 4, characterized in that: The motor (251) is fixedly connected to the motor base (2511), and the motor base (2511) is fixedly connected to the fixing cylinder (233).

9. The shock wave elimination ventilation duct according to claim 3, characterized in that: The inner wall of the first fixing ring (241) is fixedly connected to the first sealing ring (2411), and the inner wall of the first sealing ring (2411) is slidably connected to the limiting shaft (234); The inner wall of the second fixing ring (242) is fixedly connected to the second sealing ring (2421), and the inner wall of the second sealing ring (2421) is slidably connected to the limiting shaft (234).

10. The shock wave absorbing ventilation duct according to claim 3, characterized in that: The fixed tube (21) is provided with an air outlet hole (211).

Images