Ventilation pipe adjusting device suitable for blasting excavation of tunnel
By using a flexible flexible ventilation pipe with a sliding track and a limiting structure inside the tunnel, the problem of easy damage to ventilation pipes in blasting excavation tunnels was solved, enabling the adjustment and protection of the ventilation pipe's position and ensuring stable ventilation within the tunnel.
Patent Information
- Application Number
- CN202520178802.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-05
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-02-05
AI Technical Summary
Traditional fixed ventilation ducts are easily damaged during tunnel excavation by blasting, resulting in reduced wind speed, air volume and air pressure, which affects the ventilation and exhaust effect.
The ventilation pipe adopts a telescopic flexible hose structure, combined with a slide rail and a limiting structure. The position of the air outlet is fixed by a pull rope and a ground anchor block, which can realize the position adjustment of the ventilation pipe and avoid damage from blast shock waves and flying rocks.
It effectively protects ventilation ducts from blasting damage, ensures stable wind speed and air volume, reduces construction costs, simplifies construction steps, and improves ventilation quality inside tunnels.
Smart Images
Figure CN223806183U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of tunnel construction, especially a ventilation pipe adjusting device suitable for blasting excavation tunnel. BACKGROUND
[0002] In the process of hard geological stratum long tunnel excavation, often need to combine the blasting method to excavate the tunnel face, in order to ensure the health of construction personnel and the construction environment meets the requirements, after the tunnel blasting, the ventilation pipe is used to blow the tunnel face, so that the toxic gases such as carbon oxide, sulfur oxide, cyanide and nitrogen oxide in the air after blasting are blown out. In order to ensure that the toxic and harmful gases and dust near the excavation interface are blown out and meet the requirements, the distance between the outlet of the tunnel ventilation pipe and the tunnel face is only 10m. If the traditional fixed ventilation pipe is used, the ventilation pipe is easily damaged due to the blasting, which reduces the wind speed, wind volume and wind pressure, and affects the blowing and exhaust effect. SUMMARY
[0003] Therefore, the utility model aims at providing a ventilation pipe adjusting device suitable for blasting excavation tunnel, which can adjust the position of the ventilation pipe according to the needs, prevent the ventilation pipe from being damaged during the blasting of the tunnel face, and blow the tunnel face after blasting.
[0004] To achieve the above purpose, the technical scheme of the utility model is as follows:
[0005] A ventilation pipe adjusting device suitable for blasting excavation tunnel, comprising a slide arranged in the tunnel along the extension direction of the tunnel, the ventilation pipe in the tunnel is a flexible hose structure, the front part of the ventilation pipe is connected to the slide, and the outlet of the ventilation pipe is provided with a limiting structure for fixing the position of the outlet.
[0006] Further, the limiting structure comprises a pulling rope arranged at the outlet position of the ventilation pipe, and a ground anchor block arranged at the distal end of the pulling rope, the ground anchor block is placed on the ground of the tunnel, and the pulling rope is tightly fixed to the outlet of the ventilation pipe.
[0007] Further, the length of the slide is at least 40m, and the distance from the front end of the slide to the tunnel face is 8-12m.
[0008] Further, the slide is a steel wire rope slide, two embedded rings are installed on the top of the initial support of the tunnel, one end of the slide is connected with one of the embedded rings, a plurality of fixed rings are arranged at equal intervals at the front part of the ventilation pipe, and a plurality of sliding rings of the same number are arranged at the corresponding positions of the slide, and the plurality of fixed rings are connected with the corresponding sliding rings through the suspension ropes.
[0009] Compared with the prior art, the ventilation pipe adjusting device suitable for blasting excavation tunnel has the following advantages:
[0010] The utility model discloses easy installation and operation, and the flexible hose structure is adopted to the ventilation pipe, and its front part can slide and compress in the tunnel, realizes the adjustment of ventilation pipe position, solves the problem that the ventilation pipe is damaged by the blast shock wave and the flying stone impact when the tunnel is excavated by blasting method, and is favorable to the protection of ventilation pipe product. BRIEF DESCRIPTION OF DRAWINGS
[0011] The drawings that form part of the utility model are used to provide further understanding of the utility model, and the illustrative embodiment of the utility model and its explanation are used to explain the utility model, and do not constitute undue limitation on the utility model.
[0012] Figure 1 A ventilation pipe adjusting device suitable for blasting tunnel excavation of the utility model embodiment is shown in the schematic view.
[0013] Figure 2 The ventilation pipe outlet position is adjusted to the safe distance position by the adjusting device when the tunnel face is blasted, and the schematic view is shown.
[0014] Mark explanation:
[0015] 1-preburied ring;2-ramp;3-suspension rope;4-sliding ring;5-pulling rope;6-ground anchor block;7-tunnel face;8-ventilation pipe;9-tunnel;10-fixed ring. DETAILED DESCRIPTION
[0016] The utility model will be described in detail below with reference to the drawings and in combination with the embodiments.
[0017] As Figure 1 shown, a ventilation pipe adjusting device suitable for blasting tunnel excavation, including the ramp 2 that is arranged in the tunnel 9 along the tunnel extension direction, and the length of the ramp 2 is at least 40m, and the distance from the front end (the end close to the tunnel face) to the tunnel face 7 is 8-12m.The ventilation pipe 8 in the tunnel 9 adopts the flexible hose structure, such as the cloth ventilation pipe with the internal setting tendon ring, and the front part of the ventilation pipe 8 is slidably connected with the ramp 2.In order to ensure that the outlet position of the ventilation pipe 8 is stable after stretching, the pulling rope 5 is arranged at the outlet of the ventilation pipe 8, and the ground anchor block 6 is arranged at the far end of the pulling rope 5, and the ground anchor block 6 is placed on the tunnel ground, and the ground anchor block 6 can be moved artificially.The pulling rope 5 and the ground anchor block 6 constitute the limiting structure for fixing the outlet position of the ventilation pipe 8.
[0018] In this invention, the ventilation pipe 8 is arranged in the upper space of the tunnel 9. The slide 2 is preferably a wire rope slide and is located directly above the ventilation pipe 8. The slide 2 is suspended from the top of the tunnel's initial support, and the front of the ventilation pipe is suspended on the slide 2. Specifically, two pre-embedded rings 1 are installed at the top of the tunnel's initial support, and each end of the slide 2 is connected to a pre-embedded ring 1. That is, the slide 2 is suspended in the tunnel through the two pre-embedded rings 1. Several sliding rings 4 are slidably arranged on the slide 2, and several fixing rings 10 are correspondingly and equally spaced on the front of the ventilation pipe 8. The fixing rings 10 are respectively connected to the corresponding sliding rings 4 by suspension ropes 3. Since the ventilation pipe 8 is a telescopic flexible hose structure, the front of the ventilation pipe 8 can be manually compressed and stretched along the slide 2.
[0019] When ventilation ducts are needed to blow air near the tunnel face, ventilation duct 8 is in an extended state, such as... Figure 1 As shown, the distance between the air outlet and the tunnel face 7 is 8-12m. If the distance is 10m, the ground anchor block 6 is moved manually to the tunnel ground in front of the air outlet of the ventilation pipe, and the pulling rope 5 is kept taut. This fixes the position of the air outlet of the ventilation pipe, and the air blowing operation can be carried out near the tunnel face 7.
[0020] When blasting is required at tunnel face 7, workers manually pull the pull rope 5 backward while simultaneously moving the ground anchor block 6, compressing the front of the ventilation pipe 8 backward. Figure 2 As shown, the distance from the ventilation pipe outlet to the tunnel face 7 is 30m. Place the ground anchor block 6 on the tunnel floor behind the ventilation pipe outlet and ensure that the pull rope 5 is taut. This fixes the position of the ventilation pipe outlet, allowing blasting operations to be carried out on the tunnel face 7. Since the distance from the ventilation pipe to the tunnel face 7 is 30m, it prevents the ventilation pipe from being damaged by the blast shock wave and flying rocks.
[0021] This utility model has advantages such as convenient construction, reliable and safe structure, low safety risk, effective guarantee of finished duct quality, and cost savings in construction. Details are as follows:
[0022] (I) Safe and reliable structure: Steel wire rope is used as a slide and pre-embedded ring as a load-bearing device for ventilation pipe. The structure is simple and the stress is stable. The fabric ventilation pipe is lightweight and personnel can easily adjust the position of the ventilation pipe by pulling the rope.
[0023] (ii) Cost savings: By adjusting the position of the ventilation pipe outlet through this device, the ventilation pipe can be pulled away from the tunnel face during blasting and excavation to avoid damage, thus saving on ventilation pipe material costs and secondary repair costs. In addition, the adjustment device can be reused, effectively reducing cost input and construction costs.
[0024] (III) Convenient construction: the utility model is made into a complete set of devices by using conventional materials in the construction site, which simplifies the construction steps, reduces the risk of damage to the ventilation pipe, saves the engineering cost, and can be completely operated by one person when the ventilation pipe is pulled, which is simple and effective and ensures the ventilation quality of the tunnel hole closed space.
[0025] The above merely describes preferred embodiments of the utility model and is not intended to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A ventilation tube regulating device suitable for use in the blasting excavation of a tunnel, characterised in that: The chute (2) is arranged in the tunnel (9) along the tunnel extension direction, the ventilation pipe (8) in the tunnel (9) is a telescopic hose structure, the front part of the ventilation pipe (8) is slidably connected to the chute (2), and the outlet of the ventilation pipe (8) is provided with a limiting structure for fixing the position of the outlet.
2. A ventilation tube regulating device for use in the blasting excavation of a tunnel according to claim 1, characterized in that: The limiting structure comprises a pulling rope (5) arranged at the outlet position of the ventilation pipe (8) and a ground anchor block (6) arranged at the far end of the pulling rope (5), the ground anchor block (6) is placed on the tunnel ground, and the pulling rope (5) is taut to fix the outlet of the ventilation pipe (8).
3. A ventilation tube regulating device for use in the blasting excavation of a tunnel according to claim 1, characterized in that: The length of the chute (2) is at least 40 m, and the distance from the front end of the chute (2) to the tunnel face (7) is 8-12 m.
4. A ventilation tube regulating device for use in the blasting excavation of a tunnel according to claim 1, characterized in that: The chute (2) is a steel wire rope chute, two embedded rings (1) are mounted on the top of the initial support of the tunnel, the chute (2) is connected to one embedded ring (1) at each end, a plurality of fixed rings (10) are arranged at the front part of the ventilation pipe (8) at equal intervals, and the same number of sliding rings (4) are correspondingly arranged on the chute (2), and the plurality of fixed rings (10) are respectively connected to the corresponding sliding rings (4) through suspension ropes (3).