An automatic ventilation system for underground pipe gallery

Abstract

This invention discloses an automatic ventilation system for underground utility tunnels, belonging to the field of ventilation technology. It includes a ventilation emergency mechanism comprising a ventilation duct, an electric cylinder, a sleeve plate, a motor, and blades. The electric cylinder is fixedly installed at the top of the inner wall of the ventilation duct, and its output end is fixedly connected to the sleeve plate. The motor is fixedly installed on the inner wall of the sleeve plate. Blades are fixedly installed on the output end of the motor. By setting up this ventilation emergency mechanism, in the event of a fire, the motor and blades move out of the ventilation duct to the right, causing the inclined slide to automatically tilt and open, and the climbing ladder to automatically drop vertically and open, thus creating an emergency aerial safety passage. This combination of ventilation and emergency use offers higher safety, thereby solving the problem that automatic ventilation systems for underground utility tunnels are difficult to use in emergency situations to create a safe passage and quickly evacuate personnel, resulting in poor emergency safety.

Description

Technical Field

[0001] This invention relates to the field of ventilation technology, and more specifically to an automatic ventilation system for underground utility tunnels. Background Technology

[0002] Excessive humidity in utility tunnels can easily breed mold and corrode metal pipelines, while insufficient oxygen content can affect the safety of maintenance personnel. The ventilation system maintains the oxygen volume fraction at or above the normal level by exchanging air, while removing water vapor to keep the environment dry. Therefore, the automatic ventilation system of underground utility tunnels is particularly important.

[0003] In existing publicly available literature, patent publication number CN113203149A discloses a pipe gallery ventilation system and method. This technology involves setting up an air chamber at the exhaust vent and an exhaust fan connected to the air chamber. The air chamber is equipped with exhaust valves corresponding to all compartments within the fire compartment, except for the gas chamber and sewage chamber. This invention significantly reduces the number of fans and the area of ​​the air inlet and exhaust vents, substantially reduces the footprint and height of the ventilation shaft, significantly reduces the investment costs of civil engineering and equipment, and improves the utilization rate of fans and other equipment. However, this device still has the following problems.

[0004] During the automatic ventilation process of underground utility tunnels, the ventilation fans are usually installed at a high position, with one end inside the tunnel and the other end extending to the outdoor ground area. This makes it difficult for the automatic ventilation system to form a safe passage in case of a fire in the underground utility tunnel, and it is difficult to quickly evacuate the underground utility tunnel operators. As a result, the emergency use safety of the automatic ventilation system of underground utility tunnels is poor. Summary of the Invention

[0005] To achieve the above objectives, the present invention provides the following technical solution: an automatic ventilation system for underground utility tunnels, comprising a ventilation base, one end of which is fixedly connected to a ventilation cylinder, and an emergency ventilation mechanism installed on the inner wall of the ventilation cylinder, the emergency ventilation mechanism comprising:

[0006] An electric cylinder is fixedly installed on the top of the inner wall of the ventilation duct. A sleeve plate is fixedly connected to the output end of the electric cylinder, and a motor is fixedly installed on the inner wall of the sleeve plate.

[0007] The blade is fixedly mounted on the output end of the motor, which is used to drive the blade to rotate.

[0008] A separation strip is fixedly located on one side of the sleeve plate, and the separation strip is slidably connected to the ventilation duct. An inclined slide is slidably installed on the outer wall of the separation strip near its bottom end.

[0009] A linkage bar is fixed on the other side of the sleeve plate and located below the electric cylinder. The upper surface of the linkage bar is in sliding contact with a support bar, and a ladder is fixedly connected to the outer wall of the support bar.

[0010] A drop-limiting component is installed on the outer wall of the ladder, and the drop-limiting component is used to limit the vertical drop position of the ladder;

[0011] An inclined drop assembly is installed on one side of the inclined slide, and the inclined drop assembly is used to limit the inclined drop position of the inclined slide.

[0012] Preferably, the sleeve plate is slidably connected to the ventilation cylinder, and a gap is provided between the blade and the ventilation cylinder.

[0013] Preferably, the ladder and the ventilation seat are slidably connected, and there is a gap between the linkage bar and the electric cylinder.

[0014] Preferably, the drop-limiting assembly includes:

[0015] A limiting plate is slidably installed on the outer wall of the ladder, and the limiting plate is fixedly connected to the ventilation seat;

[0016] Multiple support pillars are fixedly connected to the inner wall of the ladder, and the multiple support pillars are arranged sequentially from top to bottom;

[0017] A rubber pad is located above the limiting plate, and a support frame is fixedly connected to the upper surface of the rubber pad. Both the rubber pad and the support frame are fixedly connected to the ladder.

[0018] Preferably, the rubber pad is made of silicone material, and the upper surface of the support frame is higher than the upper surface of the limiting plate.

[0019] Preferably, the tilting and falling assembly includes:

[0020] An inclined block is fixedly located on one side of the inclined slide, and an inclined guide post is fixedly connected to the bottom end of the inclined block;

[0021] A sleeve plate is slidably installed on the outer wall of the inclined guide column, and the sleeve plate is fixedly connected to the ventilation cylinder;

[0022] A cushioning pad is fixedly connected to the lower surface of the inclined slide. Multiple ventilation grooves are provided on one side of the inner wall of the inclined slide, and the separation strip is inserted into one of the ventilation grooves.

[0023] A wireless controller is installed on one side of the ladder. The wireless controller is fixedly connected to the ventilation seat. The electric cylinder and the motor are both electrically connected to the wireless controller.

[0024] Preferably, the plurality of the ventilation grooves are arranged at an angle from top to bottom, and the cushioning pad is made of silicone material.

[0025] Preferably, two connecting blocks are fixed to the upper surface of the support frame, and a support shaft is fixedly installed between the two connecting blocks;

[0026] The outer wall of the support shaft is rotatably connected to a sleeve ladder, the inner wall of the sleeve ladder is fixedly installed with multiple gripping rods, and an electromagnet is fixedly installed on one inclined surface of the sleeve ladder.

[0027] A support plate is provided on one side of the electromagnet, and the support plate is fixedly connected to the ventilation seat. The connecting ladder slides along the support plate.

[0028] Preferably, the two connecting blocks are symmetrically arranged about the support axis, and the plurality of gripping rods are arranged obliquely from top to bottom.

[0029] Preferably, the electromagnet is used to tilt the counterweight connecting the ladder, and the outer wall of the connecting ladder and the outer wall of the support plate are both smooth surfaces.

[0030] The present invention has the following advantages:

[0031] 1. This invention, by setting up a ventilation emergency mechanism, allows for remote operation by back-end management personnel in the event of a fire. The wireless controller activates the electric cylinder, which pushes the sleeve plate to the right while simultaneously shutting off the motor. This causes the motor and blades to move out of the ventilation duct to the right. The sleeve plate then moves the separation bar to the right in sync, completely separating it from the inclined slide. The inclined slide then automatically tilts and falls to open. The movement of the sleeve plate to the right also causes the linkage bar to move to the right, separating it from the support bar. The support bar then causes the ladder to automatically fall vertically to open, creating an aerial safety passage for the rapid evacuation of underground pipe gallery operators. The combination of ventilation and emergency use provides superior safety.

[0032] 2. This invention, by setting a limiting fall assembly, allows the ladder to move vertically downward along the ventilation seat and the inner wall of the limiting plate under the action of gravity. The support frame moves the rubber pad downward to contact the upper surface of the limiting plate, thus limiting the fall of the ladder. At the same time, the support frame moves the connecting block and the support shaft vertically downward, allowing the connecting ladder to move vertically downward into the gap of the ventilation seat. Under the action of the connecting ladder itself and the counterweight of the electromagnet, the connecting ladder rotates clockwise along the support shaft. The electromagnet contacts the bottom horizontal surface of the inner wall of the ventilation seat and magnetically attracts and fixes it, which can form a safe climbing channel in an emergency and quickly evacuate personnel.

[0033] 3. This invention utilizes an inclined drop assembly. After the separating strip separates from the inclined slide, the inclined slide, under the action of gravity, causes the inclined block and inclined guide column to tilt and move downwards. The inclined guide column moves along the inner wall of the sleeve plate, and the inclined slide also causes the buffer pad to move down to the outdoor ground. At the same time, the lower surface of the inclined block contacts the bottom surface of the inner wall of the sleeve plate, and the sleeve plate provides limiting support for the inclined block. This can quickly form a high-altitude safety passage in an emergency, ensuring the smooth and safe evacuation of underground utility tunnel operators. The emergency use safety of the underground utility tunnel automatic ventilation system is also superior. Attached Figure Description

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0035] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0036] Figure 1 This is a schematic diagram of the main structure of the underground utility tunnel automatic ventilation system of the present invention;

[0037] Figure 2 This is a schematic diagram of the vertical cross-section of the automatic ventilation system for underground utility tunnels according to the present invention, viewed from below.

[0038] Figure 3 This is a schematic diagram of a partial section of the structure at the connection between the sleeve plate and the separator strip in this invention.

[0039] Figure 4 This is a partial structural diagram of the vertical cross-section at the connection between the limiting plate and the ventilation seat of the present invention;

[0040] Figure 5 This is a schematic diagram of a partial section of the structure at the connection between the ladder and the support column of the present invention;

[0041] Figure 6 This is a partial structural diagram of the vertical cross-section at the connection between the ventilation duct and the sleeve plate of the present invention;

[0042] Figure 7 This is a partial structural diagram of the connection between the separating strip and the inclined slide of the present invention;

[0043] Figure 8 For the present invention Figure 1 Enlarged structural diagram at point A in the middle;

[0044] Figure 9 This is a partial bottom view of the connection between the ladder and the electromagnet in this invention.

[0045] In the diagram: 1. Ventilation seat; 2. Electric cylinder; 3. Sleeve plate; 4. Motor; 5. Blade; 6. Separator bar; 7. Inclined slide; 8. Linkage bar; 9. Support bar; 10. Ladder; 11. Limiting plate; 12. Support column; 13. Rubber pad; 14. Support frame; 15. Inclined block; 16. Inclined guide post; 17. Sleeve plate; 18. Buffer pad; 19. Ventilation groove; 20. Wireless controller; 21. Connecting block; 22. Support shaft; 23. Sleeve ladder; 24. Holding rod; 25. Electromagnet; 26. Support plate; 27. Ventilation duct. Detailed Implementation

[0046] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] like Figure 1 - Figure 9 The diagram shows an automatic ventilation system for an underground utility tunnel. This system includes an emergency ventilation mechanism, a limiting drop assembly, and a tilting drop assembly. The arrangement of these mechanisms and components allows the motor 4 and blades 5 to move to the right from the ventilation duct 27, completely separating the separating bar 6 from the inclined slide 7, causing the inclined slide 7 to automatically tilt and drop open, and separating the linkage bar 8 from the support bar 9, causing the support bar 9 to drive the climbing ladder 10 to automatically drop vertically and open. This can create an aerial safety passage for emergency evacuation of underground utility tunnel operators. The combination of ventilation and emergency use provides superior safety. The specific structural settings of each mechanism and component are as follows.

[0048] In this embodiment, as Figure 1 - Figure 7As shown, the inner wall of the ventilation duct 27 is equipped with a ventilation emergency mechanism, which includes: an electric cylinder 2, fixedly installed at the top of the inner wall of the ventilation duct 27, with a sleeve plate 3 fixedly connected to the output end of the electric cylinder 2, and a motor 4 fixedly installed on the inner wall of the sleeve plate 3; blades 5, fixedly installed on the output end of the motor 4, which drives the blades 5 to rotate; a separating strip 6, fixedly located on one side of the sleeve plate 3, and slidably connected to the ventilation duct 27, with a sloping slide 7 slidably installed on the outer wall of the separating strip 6 near its bottom end; a linkage strip 8, fixed on the other side of the sleeve plate 3 and located below the electric cylinder 2, with a support strip 9 slidably contacting the upper surface of the linkage strip 8, and a climbing ladder 10 fixedly connected to the outer wall of the support strip 9; a limiting fall assembly, installed on the outer wall of the climbing ladder 10, which limits the vertical fall position of the climbing ladder 10; and a tilting fall assembly, installed on one side of the sloping slide 7, which limits the tilting fall position of the sloping slide 7. The sleeve 3 is slidably connected to the ventilation duct 27, and there is a gap between the blade 5 and the ventilation duct 27. The ladder 10 is slidably connected to the ventilation seat 1, and there is a gap between the linkage bar 8 and the electric cylinder 2.

[0049] In operation, the output of the electric cylinder 2 pushes the sleeve 3 to the right, which in turn drives the motor 4 to move to the right. The motor 4 then drives the blade 5 to move to the right. Simultaneously, the sleeve 3 causes the separation bar 6 to no longer contact the inclined slide 7, ensuring that the inclined slide 7 automatically tilts and falls to open under gravity. At the same time, the rightward movement of the sleeve 3 also causes the linkage bar 8 to move to the right, so that the linkage bar 8 no longer supports the support bar 9. The climbing ladder 10 then automatically begins to fall vertically to open under its own weight. The limiting falling component is used to limit the vertical falling position of the climbing ladder 10, and the tilting falling component is used to limit the tilting falling position of the inclined slide 7. This completes the synchronous downward movement and assembly of the inclined slide 7 and the climbing ladder 10.

[0050] In this embodiment, as Figure 4 - Figure 5 As shown, the drop-limiting assembly includes: a limiting plate 11, slidably mounted on the outer wall of the ladder 10, and fixedly connected to the ventilation seat 1; multiple support columns 12, all fixedly connected to the inner wall of the ladder 10, arranged sequentially from top to bottom; and a rubber pad 13 located above the limiting plate 11, with a support frame 14 fixedly connected to the upper surface of the rubber pad 13. Both the rubber pad 13 and the support frame 14 are fixedly connected to the ladder 10. The rubber pad 13 is made of silicone material, and the upper surface of the support frame 14 is higher than the upper surface of the limiting plate 11.

[0051] During use, the ladder 10 moves vertically downwards synchronously under the action of gravity, which ensures that the ladder 10 moves vertically downwards along the inner wall of the limiting plate 11. In addition, the support frame 14 moves the rubber pad 13 vertically downwards. The lower surface of the rubber pad 13 contacts the upper surface of the limiting plate 11, which plays a certain role in buffering and limiting. In this way, the ladder 10 is limited to the designated vertical downward position, ensuring that the ladder 10 can move down and unfold.

[0052] In this embodiment, as Figure 6 - Figure 7 As shown, the inclined drop assembly includes: an inclined block 15, fixedly located on one side of the inclined slide 7, with an inclined guide post 16 fixedly connected to the bottom end of the inclined block 15; a sleeve plate 17, slidably mounted on the outer wall of the inclined guide post 16, and fixedly connected to the ventilation duct 27; a buffer pad 18, fixedly connected to the lower surface of the inclined slide 7, with multiple ventilation slots 19 opened on one side of the inner wall of the inclined slide 7, and a separation strip 6 inserted into one of the ventilation slots 19; and a wireless controller 20, installed on one side of the climbing ladder 10, fixedly connected to the ventilation seat 1, with the electric cylinder 2 and motor 4 both electrically connected to the wireless controller 20. The multiple ventilation slots 19 are arranged inclinedly from top to bottom, and the buffer pad 18 is made of silicone.

[0053] The inclined slide 7, under its own weight, will cause the inclined block 15 to tilt and move downward, ensuring that the inclined guide post 16 tilts and moves downward along the inner wall of the sleeve plate 17. In addition, the inclined slide 7 will cause the buffer pad 18 to move downward, and the buffer pad 18 will contact the outdoor ground. In this way, the sleeve plate 17 can provide limiting support for the lower surface of the inclined block 15, ensuring that the inclined slide 7 can quickly move downward and spread along the inclined path using its own weight, thus improving the efficiency of emergency response.

[0054] In this embodiment, as Figure 8 - Figure 9 As shown, two connecting blocks 21 are fixed to the upper surface of the support frame 14, and a support shaft 22 is fixedly installed between the two connecting blocks 21. A connecting ladder 23 is rotatably connected to the outer wall of the support shaft 22, and multiple gripping rods 24 are fixedly installed on the inner wall of the connecting ladder 23. An electromagnet 25 is fixedly installed on one inclined surface of the connecting ladder 23. A support plate 26 is provided on one side of the electromagnet 25, and the support plate 26 is fixedly connected to the ventilation seat 1. The connecting ladder 23 slides along the support plate 26. The two connecting blocks 21 are symmetrically arranged about the support shaft 22, and the multiple gripping rods 24 are arranged in an inclined manner from top to bottom. The electromagnet 25 is used to tilt the counterweight of the connecting ladder 23. The outer walls of the connecting ladder 23 and the outer walls of the support plate 26 are both smooth surfaces.

[0055] In use, the connecting block 21 drives the support shaft 22 to move vertically downward, causing the connecting ladder 23 to move vertically downward along the left side of the support plate 26. The connecting ladder 23 enters the gap inside the ventilation seat 1. Due to the lack of support from the ventilation seat 1, the connecting ladder 23 rotates clockwise along the outer wall of the support shaft 22, causing the lower surface of the electromagnet 25 to contact the horizontal surface at the bottom of the inner wall of the ventilation seat 1 and be magnetically fixed, thus completing the horizontal laying of the connecting ladder 23.

[0056] The usage process of the underground utility tunnel automatic ventilation system of the present invention is as follows:

[0057] First, when using this invention for ventilation, the outer wall of the ventilation seat 1 is fixed to the ventilation opening of the pipe gallery, and the outer wall of the ventilation seat 1 is sealed with sealant. Simultaneously, the ventilation seat 1 and the ventilation cylinder 27 are placed horizontally, with the left side of the ventilation seat 1 inside the pipe gallery and the right end of the ventilation cylinder 27 outside. The wireless controller 20 is remotely activated via a backend computer. The wireless controller 20 starts the motor 4, which drives the blades 5 to rotate. This allows humid air in the underground pipe gallery to enter the ventilation cylinder 27 through the ventilation seat 1 and be output to the outside through the ventilation cylinder 27. Furthermore, the multiple ventilation slots 19 on the inclined slide 7 ensure unobstructed ventilation, thus completing the automatic ventilation operation of the underground pipe gallery.

[0058] Secondly, when the present invention is used for emergency ventilation, in the event of a fire, the back-end management personnel can remotely activate the electric cylinder 2 via the back-end computer. The output end of the electric cylinder 2 pushes the sleeve plate 3 to the right, and the wireless controller 20 shuts down the motor 4. In this way, the sleeve plate 3 drives the motor 4 to move to the right, and the motor 4 drives the blade 5 to move to the right. Thus, the motor 4 and the blade 5 move to the right from inside the ventilation duct 27. At the same time, the sleeve plate 3 drives the separation bar 6 to slide to the right along the inner wall of the ventilation duct 27. The separation bar 6 no longer contacts the inclined slide 7, so the separation bar 6 and the inclined slide 7 are completely separated. At this time, the separation bar 6 moves to the outside position of the ventilation duct 27, and the inclined slide 7 automatically tilts and falls to open under the action of gravity.

[0059] At the same time, as the sleeve plate 3 moves to the right, it will drive the linkage bar 8 to move to the right. The linkage bar 8 moves to the right and separates from the lower surface of the support bar 9. Thus, the linkage bar 8 no longer supports the support bar 9, and the support bar 9 drives the ladder 10 to move down. Under the action of its own gravity, the ladder 10 begins to automatically fall vertically downward and open.

[0060] Meanwhile, when the present invention limits the fall, the ladder 10 drives multiple support columns 12 to move vertically downward synchronously under the action of gravity, and the ladder 10 moves vertically downward along the ventilation seat 1, the ladder 10 moves vertically downward along the inner wall of the limiting plate 11, and the ladder 10 drives the support frame 14 to move vertically downward, the support frame 14 drives the rubber pad 13 to move vertically downward, and the lower surface of the rubber pad 13 contacts the upper surface of the limiting plate 11, thereby limiting the vertical fall position of the ladder 10.

[0061] Simultaneously, the support frame 14 drives the two connecting blocks 21 to move vertically downwards, the connecting blocks 21 drive the support shaft 22 to move vertically downwards, and the support shaft 22 drives the connecting ladder 23 to move vertically downwards. The connecting ladder 23 moves vertically downwards along the left side of the support plate 26, and at the same time, the connecting ladder 23 moves vertically downwards along the left side of the ventilation seat 1. In this way, the connecting ladder 23 enters the gap inside the ventilation seat 1. Due to the lack of support from the ventilation seat 1, the connecting ladder 23, under the action of its own weight and the counterweight of the electromagnet 25, rotates clockwise along the outer wall of the support shaft 22. The connecting ladder 23 drives multiple gripping rods 24 to rotate clockwise, which in turn drives the electromagnet 25 to rotate clockwise. The lower surface of the electromagnet 25 contacts the horizontal surface at the bottom of the inner wall of the ventilation seat 1, thereby activating the electromagnet 25 via the wireless controller 20. This allows the electromagnet 25 to be magnetically fixed to the horizontal surface at the bottom of the inner wall of the ventilation seat 1. In this way, the connecting ladder 23 is horizontally laid and fixed on the inner wall of the ventilation seat 1, and the magnetic force generated by the electromagnet 25 can cover the weight of the person. The electromagnet 25 is a 2400GS type electromagnet, which improves the firmness of the magnetic attraction.

[0062] Simultaneously, during the limited descent of the present invention, after the separation strip 6 is used to separate the inclined slide 7, the inclined slide 7, under its own weight, will cause the inclined block 15 to tilt and move downwards. The inclined block 15 will cause the inclined guide post 16 to tilt and move downwards. The inclined guide post 16 will tilt and move downwards along the inner wall of the sleeve plate 17, and the ventilation tube 27 will support the sleeve plate 17, increasing the stability of the sleeve plate 17. As a result, the inclined slide 7 will cause the buffer pad 18 to move downwards. The buffer pad 18 will contact the outdoor ground, and the lower surface of the inclined block 15 will contact the bottom surface of the inner wall of the sleeve plate 17. In this way, the sleeve plate 17 can provide limited support for the lower surface of the inclined block 15. This ensures that the upper surface of the sleeve plate 17 no longer obstructs the rightward movement path of the blade 5.

[0063] Finally, during evacuation, the ladder 10 descends and opens, and the connecting ladder 23 unfolds horizontally on the inner wall of the ventilation seat 1. The connecting plate 17 also moves downwards and unfolds outdoors. Simultaneously, the interior of the ventilation seat 1 and the ventilation cylinder 27 provides ample space, preventing obstruction by the motor 4 and blades 5. Personnel trapped in the pipe gallery by fire can climb the ladder 10, using both hands and feet to climb the support pillar 12, then climb the gripping bar 24 to enter the ventilation seat 1, pass through the ventilation seat 1 to enter the ventilation cylinder 27, and finally slide smoothly down the inner wall of the inclined slide 7, achieving a safe escape. This system provides both ventilation and an emergency safe evacuation route, allowing for emergency evacuation even when the ventilation seat 1 and ventilation cylinder 27 are in a high position.

[0064] All contents not described in detail in the specification are existing technologies known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited; conventional equipment can be used. Electrical control components not mentioned in this technical solution are not shown in the figures because they are existing technologies, and will not be described here.

[0065] The present invention has been described in detail above with general descriptions and specific embodiments. However, modifications or improvements can be made to the present invention, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An automatic ventilation system for underground pipe gallery, comprising a ventilation seat (1), one end of which is fixedly connected with a ventilation cylinder (27), characterized in that: The ventilation duct (27) is equipped with a ventilation emergency mechanism on its inner wall, the ventilation emergency mechanism including: An electric cylinder (2) is fixedly installed on the top of the inner wall of the ventilation duct (27). The output end of the electric cylinder (2) is fixedly connected to a sleeve plate (3), and a motor (4) is fixedly installed on the inner wall of the sleeve plate (3). The blade (5) is fixedly installed on the output end of the motor (4), which is used to drive the blade (5) to rotate; Separation strip (6) is fixedly located on one side of sleeve plate (3), and the separation strip (6) is slidably connected to ventilation tube (27). An inclined slide (7) is slidably installed on the outer wall of the separation strip (6) near its bottom end. Linkage bar (8) is fixed on the other side of sleeve plate (3) and located below electric cylinder (2). The upper surface of linkage bar (8) is in sliding contact with support bar (9). The outer wall of support bar (9) is fixedly connected with ladder (10). A drop-limiting assembly is installed on the outer wall of the ladder (10), and the drop-limiting assembly is used to limit the vertical drop position of the ladder (10); An inclined drop assembly is installed on one side of the inclined slide (7), and the inclined drop assembly is used to limit the inclined drop position of the inclined slide (7).

2. The underground pipe rack automated ventilation system of claim 1, wherein: The sleeve (3) is slidably connected to the ventilation cylinder (27), and there is a gap between the blade (5) and the ventilation cylinder (27).

3. The underground pipe rack automated ventilation system of claim 1, wherein: The ladder (10) is slidably connected to the ventilation seat (1), and there is a gap between the linkage bar (8) and the electric cylinder (2).

4. The underground tunnel automated ventilation system of claim 1, wherein: The drop-limiting component includes: A limiting plate (11) is slidably installed on the outer wall of the ladder (10), and the limiting plate (11) is fixedly connected to the ventilation seat (1); Multiple support pillars (12) are fixedly connected to the inner wall of the ladder (10), and the multiple support pillars (12) are arranged sequentially from top to bottom; A rubber pad (13) is located above the limiting plate (11). A support frame (14) is fixedly connected to the upper surface of the rubber pad (13). Both the rubber pad (13) and the support frame (14) are fixedly connected to the ladder (10).

5. The underground tunnel automated ventilation system of claim 4, wherein: The rubber pad (13) is made of silicone material, and the upper surface of the support frame (14) is higher than the upper surface of the limiting plate (11).

6. The underground tunnel automated ventilation system of claim 1, wherein: The tilting and falling assembly includes: An inclined block (15) is fixedly located on one side of the inclined slide (7), and an inclined guide post (16) is fixedly connected to the bottom end of the inclined block (15). A sleeve plate (17) is slidably installed on the outer wall of the inclined guide post (16), and the sleeve plate (17) is fixedly connected to the ventilation cylinder (27); A buffer pad (18) is fixedly connected to the lower surface of the inclined slide (7). A plurality of ventilation grooves (19) are provided on one side of the inner wall of the inclined slide (7). The separation strip (6) is inserted into one of the ventilation grooves (19). The wireless controller (20) is installed on one side of the ladder (10). The wireless controller (20) is fixedly connected to the ventilation seat (1). The electric cylinder (2) and the motor (4) are both electrically connected to the wireless controller (20).

7. The underground tunnel automated ventilation system of claim 6, wherein: The multiple air-permeable grooves (19) are arranged at an angle from top to bottom, and the cushioning pad (18) is made of silicone.

8. The automatic ventilation system for underground utility tunnels as described in claim 4, characterized in that: Two connecting blocks (21) are fixed on the upper surface of the support frame (14), and a support shaft (22) is fixedly installed between the two connecting blocks (21). The outer wall of the support shaft (22) is rotatably connected to a connecting ladder (23), and a plurality of grip rods (24) are fixedly installed on the inner wall of the connecting ladder (23). An electromagnet (25) is fixedly installed on one inclined surface of the connecting ladder (23). The electromagnet (25) has a support plate (26) on one side, the support plate (26) is fixedly connected to the ventilation seat (1), and the connecting ladder (23) slides along the support plate (26).

9. The automatic ventilation system for underground utility tunnels as described in claim 8, characterized in that: The two connecting blocks (21) are symmetrically arranged about the support shaft (22), and the multiple gripping rods (24) are arranged obliquely from top to bottom.

10. The automatic ventilation system for underground utility tunnels as described in claim 8, characterized in that: The electromagnet (25) is used to tilt the counterweight to connect the ladder (23), and the outer wall of the connecting ladder (23) and the outer wall of the support plate (26) are both smooth surfaces.

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