A tunnel ventilation duct connection device

Abstract

A tunnel ventilation duct connection device includes a connecting cylinder extending through both ends, with connecting assemblies movably connected to both ends of the connecting cylinder. The connecting cylinder includes a cylinder body and fixing plates on the outer rings of its two ends, with slots provided on opposite sides of the fixing plates. The connecting assembly includes a connecting pipe with an outer diameter smaller than the outer diameter of the cylinder body and a sealing ring at one end. The outer ring of the sealing ring has a locking block that engages with the slot. An anti-backflow ring is also fitted around the outer ring of the connecting pipe. This device simplifies the installation and disassembly process of the ventilation duct system, reduces the working time and labor intensity of personnel, thereby improving work efficiency; it also enhances the durability of the device, ensuring effective operation even under harsh environmental conditions; the anti-backflow ring helps reduce air leakage during ventilation; and the cylinder body, being made of flexible material, expands with changes in wind pressure, thus reducing wind resistance.

Description

Technical Field

[0001] This utility model relates to the field of tunnel ventilation, specifically a tunnel ventilation duct connection device. Background Technology

[0002] Currently, most tunnel ventilation ducts are connected using flanges, which are bolted to tightly connect the ventilation duct to the flanges of other equipment. However, flange connections require a long installation time and skilled operators, are complex to install, and are prone to problems such as loose bolts and inadequate sealing, leading to air leaks. Furthermore, due to environmental factors and the influence of the medium, flange connections are susceptible to corrosion and rust, affecting their service life and connection quality. Additionally, corrosion and rust on the flanges compromise the sealing effect, potentially requiring significant adjustments to the entire ventilation system. The complexity of flange connection installation increases the complexity and cost of construction and maintenance. Utility Model Content

[0003] To address the technical problems of existing ventilation duct connection devices, such as complex installation, poor sealing performance, and easy air leakage, as described in the background, this utility model provides a tunnel ventilation duct connection device.

[0004] The technical solution of this utility model is as follows:

[0005] A tunnel ventilation duct connection device includes a connecting cylinder with two through ends, and connecting components are movably connected to both ends of the connecting cylinder; the connecting cylinder includes a cylinder body and fixing plates on the outer rings of its two ends, and grooves are provided on the opposite sides of the two fixing plates.

[0006] The connecting assembly includes a connecting pipe with an outer diameter smaller than that of the cylinder and a sealing ring at one end. The outer ring of the sealing ring is provided with a locking block that engages with the slot. The outer ring of the connecting pipe is also fitted with an anti-windback ring.

[0007] After passing one end of the ventilation duct through the connecting pipe, fold it outwards to the connection point between the sealing ring and the connecting pipe. Then, put an anti-backflow ring on the outer ring of the connecting pipe to prevent backflow and secure the ventilation duct. Subsequently, snap the sealing ring and the duct body together using the locking blocks and grooves. This simplifies the installation and disassembly process of the ventilation duct system, reduces the working time and labor intensity of the staff, and thus improves work efficiency.

[0008] Furthermore, the outer diameter of the sealing ring is larger than the inner diameter of the cylinder. This ensures that the sealing ring can completely cover the openings at both ends of the cylinder, preventing air leakage.

[0009] Preferably, at least one side wall of the slot is provided with a groove, and one side of the locking block is provided with a protrusion that can engage with the groove by rotation. After the locking block is inserted into the slot, it is rotated to engage the protrusion with the groove, which simplifies the installation and disassembly process of the ventilation duct system and improves work efficiency.

[0010] To further enhance the connection stability between the sealing ring and the cylinder, the grooves are arranged in a circumferential array around the cylinder axis.

[0011] More preferably, the windproof return ring is configured to elastically fit tightly against the outer ring of the connecting pipe. The tight fit between the windproof return ring and the outer ring of the connecting pipe can press the air duct and the connecting pipe together, effectively preventing air leakage. At the same time, its elasticity allows it to adapt to air ducts of different thicknesses and to remain tightly fitted against the outer ring of the connecting pipe when the connecting pipe undergoes different deformations.

[0012] In a preferred embodiment, the windproof return ring is made of hydrogenated nitrile rubber. Hydrogenated nitrile rubber is a special elastomer with outstanding resistance to extreme temperatures, chemical resistance, and abrasion resistance.

[0013] Furthermore, the cylinder body is made of PVC plastic polyester fabric, which not only has good mechanical strength, wear resistance, and tear resistance, but is also lightweight, flexible, and easy to handle and install.

[0014] Preferably, the fixing plate and sealing ring are made of carbon steel, which gives them high strength, corrosion resistance and weldability, while also having low manufacturing cost and good machinability.

[0015] Preferably, the connecting pipe is made of stainless steel, which has good wear resistance, excellent chemical resistance, good resistance to alkali metals and acids, and is tough, lightweight, and easy to install and construct.

[0016] The beneficial effects of the tunnel ventilation duct connection device of this utility model through the above design are:

[0017] 1) After inserting the clip into the slot, rotate it to make the protrusion engage with the groove, which realizes the quick installation between the connecting cylinder and the connecting component, simplifies the installation and disassembly process of the air duct system, reduces the working time and labor intensity of the staff, and thus improves work efficiency.

[0018] 2) The materials of the connecting components have high durability and strength, which increases the durability of this utility model, extends its service life, reduces maintenance costs, and ensures that it can still operate effectively under harsh environmental conditions.

[0019] 3) The windproof backflow ring helps reduce air leakage during ventilation, and the cylinder is made of flexible material that can expand with changes in wind pressure, thereby reducing wind resistance. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1 This is a structural diagram of the tunnel ventilation duct connection device in the embodiment;

[0022] Figure 2 This is a connection diagram of the tunnel ventilation duct connection device in the embodiment;

[0023] Figure 3 This is a structural diagram of the connection components in the embodiment;

[0024] The components represented by the various reference numerals in the diagram are:

[0025] 1. Cylinder body; 2. Fixing plate; 201. Groove; 3. Connecting assembly; 301. Sealing ring; 302. Locking block; 303. Connecting pipe; 304. Anti-windback ring. Detailed Implementation

[0026] Exemplary embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0027] Example

[0028] Combination Figures 1 to 3 This embodiment provides a tunnel ventilation duct connection device, including a connecting cylinder with two through ends, and connecting components 3 are movably connected to both ends of the connecting cylinder.

[0029] In this embodiment, the connecting cylinder includes a cylinder body 1 and fixing plates 2 on the outer rings of its two ends.

[0030] Furthermore, the cylinder body 1 is made of PVC plastic polyester duct cloth, which not only has good mechanical strength, wear resistance, and tear resistance, but is also lightweight, flexible, and easy to handle and install.

[0031] Specifically, the fixing plate 2 is a square plate with a side length that is not less than the outer diameter of the connecting cylinder and not more than 1.5 times the outer diameter of the connecting cylinder, ensuring that there is enough space on the fixing plate 2 to set the slot 201, while avoiding waste and increased installation difficulty due to excessive size.

[0032] In this embodiment, the connecting component 3 includes a connecting pipe 303 with an outer diameter smaller than that of the cylinder 1 and a sealing ring 301 at one end.

[0033] In practice, the length of the cylinder 1 is twice the length of the connecting pipe 303, and no more than three times the length of the connecting pipe 303. This ensures that the cylinder 1 can cover the connecting pipes 303 at both ends, avoiding increased installation difficulty due to excessive length of the cylinder 1.

[0034] Preferably, the connecting pipe 303 is made of stainless steel, which has good wear resistance, excellent chemical resistance, good resistance to alkali metals and acids, and is tough, lightweight, and easy to install and construct.

[0035] Furthermore, the outer diameter of the sealing ring 301 is larger than the inner diameter of the cylinder 1. This ensures that the sealing ring 301 can completely cover the openings at both ends of the cylinder 1, preventing air leakage.

[0036] In practice, the outer diameter of the sealing ring 301 is larger than the outer diameter of the connecting pipe 303, and its inner diameter matches the inner diameter of the connecting pipe 303, which facilitates processing and manufacturing, and at the same time increases the fit between the sealing ring 301 and the air duct and the connecting pipe 303.

[0037] Preferably, the fixing plate 2 and the sealing ring 301 are made of carbon steel, which gives them high strength, corrosion resistance and weldability, while also having low manufacturing cost and good machinability.

[0038] In this embodiment, each of the two fixing plates 2 is provided with a groove 201 on the opposite side, and the outer ring of the sealing ring 301 is provided with a locking block 302 that engages with the groove 201.

[0039] Preferably, at least one side wall of the slot 201 is provided with a groove, and one side of the locking block 302 is provided with a protrusion that can be engaged with the groove by rotation. After the locking block 302 is inserted into the slot 201, it is rotated to make the protrusion engage with the groove, which simplifies the installation and disassembly process of the air duct system and improves work efficiency.

[0040] To further enhance the connection stability between the sealing ring 301 and the cylinder 1, the groove 201 is arranged in a circumferential array around the axis of the cylinder 1.

[0041] Preferably, there are 8 slots 201 and 8 locking blocks 302 to ensure that the fixing plate 2 and the sealing ring 301 have a sufficiently stable connection strength, while avoiding excessive slots 201 that would increase unnecessary operations during production and affect production efficiency.

[0042] In this embodiment, the outer ring of the connecting pipe 303 is also fitted with a windproof backflow ring 304.

[0043] More preferably, the windproof return ring 304 is configured to elastically fit tightly against the outer ring of the connecting pipe 303. The tight fit between the windproof return ring 304 and the outer ring of the connecting pipe 303 can press the air duct and the connecting pipe 303 together, effectively preventing air leakage. At the same time, its elasticity allows it to adapt to air ducts of different thicknesses and to remain tightly fitted against the outer ring of the connecting pipe 303 when the connecting pipe 303 undergoes different deformations.

[0044] In a preferred embodiment, the windproof return ring 304 is made of hydrogenated nitrile butadiene rubber. Hydrogenated nitrile butadiene rubber is a special elastomer with outstanding resistance to extreme temperatures, chemical resistance, and abrasion resistance.

[0045] The installation method of this utility model is as follows: Pass one end of the air duct through the connecting pipe 303 and fold it outwards to the connection point between the sealing ring 301 and the connecting pipe 303. Then, place the anti-backflow ring 304 on the outer ring of the connecting pipe 303, which has already been connected to the air duct, and press the air duct and connecting pipe 303 together to prevent backflow and fix the air duct. Wire can be wrapped around the outer ring of the connecting pipe 303 to further strengthen the fixation of the air duct. After initially fixing the air duct, assemble the connecting component 33 with the cylinder body 11. Align the locking block 302 with the slot 201 and insert it. Then, rotate the sealing ring 301 until the protrusion on the side of the locking block 302 engages with the groove on the side of the slot 201, tightening the connecting component 3 onto the fixing plate 2. After engagement, wooden wedges can be inserted into the gap between the locking block 302 and the slot 201 for further reinforcement.

[0046] Through the above design, this utility model allows the locking block 302 to be inserted into the slot 201 and then rotated to make the protrusion engage with the groove, enabling the connecting component 3 to be tightened onto the fixing plate 2. This achieves rapid installation between the connecting cylinder and the connecting component 3, simplifies the installation and disassembly process of the ventilation duct system, reduces the working time and labor intensity of personnel, and thus improves work efficiency. The material of the connecting component 3 has high durability and strength, increasing the durability of this utility model, extending its service life, reducing maintenance costs, and ensuring its effective operation under harsh environmental conditions. The windproof backflow ring 304 helps reduce air leakage during ventilation, and the cylinder 1 is made of flexible material that can expand with changes in wind pressure, thereby reducing wind resistance.

Claims

1. A tunnel fan duct connection apparatus, characterized by, The utility model relates to a wind -proof and backflow -proof connecting tube, which comprises a connecting tube with two ends through, and a connecting assembly (3) movably connected to the two ends of the connecting tube. The connecting tube comprises a tube body (1) and two fixed plates (2) at the outer ends of the tube body (1), and the two fixed plates (2) are provided with notches (201) on the sides away from each other. The connecting assembly (3) comprises a connecting pipe (303) with an outer diameter smaller than that of the tube body (1) and a sealing ring (301) at one end of the connecting pipe (303), and the outer ring of the sealing ring (301) is provided with a clamping block (302) capable of being clamped and matched with the notches (201). The outer ring of the connecting pipe (303) is further provided with a wind -proof backflow ring (304).

2. A tunnel fan duct connection according to claim 1, characterised in that The outer diameter of the sealing ring (301) is greater than the inner diameter of the tube body (1).

3. A tunnel fan duct connection according to claim 1, wherein, At least one side wall of the notches (201) is provided with a groove, and one side of the clamping block (302) is provided with a protrusion capable of being clamped and matched with the groove through rotation.

4. A tunnel fan duct connection according to claim 1, wherein, The notches (201) are circumferentially arrayed around the axis of the tube body (1).

5. A tunnel fan duct connection according to claim 1, wherein, The wind -proof backflow ring (304) is elastically close to the outer ring of the connecting pipe (303).

6. A tunnel fan duct connection according to claim 5, wherein, The material of the wind -proof backflow ring (304) is hydrogenated butyronitrile rubber.

7. A tunnel fan duct connection according to claim 1, wherein, The material of the tube body (1) is PVC plastic polyester wind tube cloth.

8. A tunnel fan duct connection according to claim 1, wherein, The fixed plate (2) and the sealing ring (301) are made of carbon steel.

9. A tunnel fan duct connection according to claim 1, wherein, The material of the connecting pipe (303) is stainless steel.

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