Ventilation system for tunnel construction

Abstract

The application provides a ventilation system for tunnel construction, comprising a ventilation box, a plurality of air supply pipes and a moving base; a plurality of air inlets and air outlets are formed in the ventilation box; the plurality of air supply pipes are arranged at intervals along the direction of tunnel construction, the air supply pipe adjacent to the ventilation box is communicated with the inside of the ventilation box, and the two adjacent air supply pipes are communicated with each other; the moving base is arranged on the inner side of the tunnel, and a blower is arranged on the moving base and communicated with the air supply pipe far away from the ventilation box. Each air supply pipe is connected with a coil assembly, which is used for winding or bending the air supply pipe to reduce the length of the air supply pipe along the construction direction; according to the construction progress, a certain amount of air supply pipe is released, and the action range of the blower can be changed by reasonably selecting the position of the moving base. The ventilation system for tunnel construction can adjust the propagation range of the airflow formed by the ventilation system, so as to ensure the sufficient oxygen content of the tunnel in each stage of the tunnel construction, thereby improving the safety in the tunnel construction process.

Description

Technical Field

[0001] This application belongs to the field of ventilation technology for construction tunnels, and specifically relates to a ventilation system for tunnel construction. Background Technology

[0002] Tunnel construction is the process of building passages underground or in mountains through engineering techniques such as excavation, support, and lining. During the construction process, in order to ensure the oxygen content in the tunnel, a ventilation system is usually installed in the tunnel, in conjunction with natural ventilation structures such as shafts and air ducts, to meet the oxygen supply for workers in the tunnel, as well as to dilute and disperse harmful gases and hazardous substances in a timely manner.

[0003] The common ventilation system in the existing technology uses axial flow fans to apply thrust to the air in the tunnel, so that the gas forms an airflow that flows in a predetermined direction; however, when applied to long-distance tunnel construction scenarios, the propagation path of the airflow generated by the fan is limited, so as the construction progresses, the oxygen concentration in the tunnel becomes more and more scarce in the later stages of the project. Utility Model Content

[0004] This application provides a ventilation system for tunnel construction, which aims to adjust the propagation range of the airflow formed by the ventilation system to ensure sufficient oxygen content in the tunnel at each stage of tunnel construction, thereby improving the safety of the tunnel construction process.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A ventilation system for tunnel construction is provided, comprising:

[0007] A ventilation box is used to be installed on the top of the tunnel entrance; the ventilation box has several air inlets facing outwards from the tunnel and air outlets facing inwards from the tunnel.

[0008] Multiple air supply pipes are arranged along the tunnel construction direction inside the ventilation box; adjacent air supply pipes are interconnected, and the air supply pipe adjacent to the ventilation box is connected to the ventilation box; each air supply pipe is connected to a coil assembly, which is used to wind or bend the air supply pipe to shorten the length of the air supply pipe facing the inside of the tunnel; and

[0009] A movable base is used to be installed inside the tunnel and to be fixed to the tunnel wall or bottom; a blower is installed on the movable base, and the blower is connected to the air supply pipe away from the ventilation box;

[0010] When the blower is started, the gas in the ventilation box enters the blower through multiple air supply pipes and is discharged into the tunnel.

[0011] In one possible implementation, the coil assembly includes:

[0012] Top plate, used to be fixedly installed on the top surface inside the tunnel;

[0013] A base plate, disposed below the top plate, and detachably connected to the top plate via multiple connecting rods, forms a ductwork space between the top plate and the base plate; the air supply duct is disposed within the ductwork space; and

[0014] Multiple levers are arranged within the duct space; the multiple levers are spaced apart along the length of the air supply duct and alternately arranged on both sides of the width of the air supply duct; each lever is connected to the top plate or the bottom plate through an elastic reset member, the elastic reset member being used to drive the lever to move toward the air supply duct, so that the air supply duct bends along its own width direction to form a wave-shaped structure.

[0015] In one possible implementation, the lever extends through the base plate and outwards, and a guide rod is fixedly provided on the lower side of the base plate and slidably connected to the extended end of the lever;

[0016] The elastic reset component is a spring sleeved on the guide rod, and the two ends of the spring are respectively connected to one end of the guide rod and the extended end of the lever;

[0017] When the air supply pipe is in a straight state, the spring is in an elastically compressed state to facilitate the movement of the lever; when the air supply pipe is in a bent state, the spring is in an elastically compressed state or a non-deformed state.

[0018] In one possible implementation, the connecting rod is a screw fixedly mounted on the top plate, the connecting rod passes through the bottom plate and extends outward, and the extended portion is threadedly connected to a mating nut, the mating nut being used to abut against the lower side of the bottom plate to restrict the relative movement of the top plate and the bottom plate.

[0019] In one possible implementation, two adjacent air supply pipes are connected by a pipe connector;

[0020] The outer side of the connector is provided with a positioning ring, and the base plate is provided with an elastic clip for engaging with the positioning ring.

[0021] When the elastic clip engages with the positioning ring, the air supply pipe inside the corresponding pipe space is fixed in a bent state.

[0022] In one possible implementation, the blower and the air supply pipe are connected by an L-shaped connector, so that when the air supply pipe is at the center of the tunnel's top surface, both the blower and the movable base can be positioned on the side of the tunnel.

[0023] In one possible implementation, the movable seat includes:

[0024] A support platform is provided for installation on the bottom surface of the tunnel, and the blower is installed on top of the support platform with a gap between it and the top surface of the tunnel.

[0025] A sliding arm is disposed on the upper side of the blower and is used to slide in connection with the top surface of the tunnel.

[0026] In one possible implementation, the ventilation system further includes:

[0027] A plurality of guide rails are arranged along the tunnel construction direction on the tunnel top surface. The sliding arm is slidably connected to the guide rails and is adapted to slide from any one of the guide rails to the adjacent guide rail.

[0028] In one possible implementation, the support platform further includes:

[0029] A positioning sleeve is slidably fitted onto the support platform in the vertical direction; the positioning sleeve has an alignment plate for facing the inner side of the tunnel, the alignment plate has a through hole, and a fixing pile for inserting into the inner side of the tunnel is inserted into the through hole.

[0030] In one possible implementation, each of the air inlets is connected to an air guide;

[0031] The air guide is fixedly installed on the outer side of the ventilation box; in the direction of the air inlet away from the inner cavity of the ventilation box, the inner diameter of the air guide gradually increases to form a funnel-shaped structure.

[0032] The air guide component is equipped with a filter screen, which is used to intercept impurities in the air.

[0033] In this embodiment, a blower generates suction, creating an airflow that enters the ventilation box from the air inlet and then passes through multiple air supply pipes. The airflow is then discharged into the tunnel through the blower to achieve tunnel ventilation. During tunnel construction, the coil assembly can adjust the length of the corresponding air supply pipe along the construction direction to ensure orderly gas delivery. As construction progresses and the tunnel goes deeper, the position of the blower can be changed synchronously by altering the position of the movable base, thereby changing the blower's operating range and ensuring ventilation and oxygen supply deep within the tunnel.

[0034] The ventilation system for tunnel construction provided in this embodiment, compared with the prior art, can adjust the propagation range of the airflow formed by the ventilation system to ensure sufficient oxygen content in the tunnel at each stage of tunnel construction, thereby improving the safety of the tunnel construction process. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a three-dimensional structural diagram of a ventilation system for tunnel construction provided in an embodiment of this application;

[0037] Figure 2 This is a three-dimensional structural diagram of the vent box and air guide used in the embodiments of this application from an explosion perspective;

[0038] Figure 3 This is a cross-sectional view of the ventilation box used in the embodiments of this application;

[0039] Figure 4 This is a three-dimensional structural diagram of the air guide and filter screen used in the embodiments of this application in a combined state;

[0040] Figure 5 This is a three-dimensional structural diagram of the air supply duct and connecting pipe used in the embodiments of this application under an explosive state;

[0041] Figure 6 This is a partially enlarged schematic diagram of the base plate and connecting pipe used in the embodiments of this application under an explosive state;

[0042] Figure 7 This is a three-dimensional structural diagram of the movable base, blower, and connector used in the embodiments of this application in an assembled state;

[0043] Figure 8 This is a three-dimensional structural diagram of the positioning sleeve and fixing pile used in the embodiments of this application under an explosive state;

[0044] Figure 9 This is a three-dimensional structural diagram of the air supply duct and base plate used in the embodiments of this application in a combined state;

[0045] Figure 10 This is an exploded view of the coil assembly used in the embodiments of this application;

[0046] Figure 11This is a three-dimensional structural diagram of the base plate and lever used in the embodiments of this application in a combined state;

[0047] Explanation of reference numerals in the attached drawings: 1. Ventilation box; 11. Air inlet; 12. Air outlet; 2. Air supply duct; 3. Movable seat; 31. Support platform; 32. Sliding arm; 4. Coil assembly; 41. Top plate; 411. Connecting rod; 412. Connecting nut; 42. Base plate; 421. Guide rod; 422. Elastic clip; 43. Lever; 431. Elastic reset component; 5. Blower; 6. Connector; 61. Positioning ring; 7. Connecting component; 8. Guide rail; 9. Positioning sleeve; 91. Alignment plate; 911. Through hole; 912. Fixing post; 10. Air guide component; 101. Filter screen. Detailed Implementation

[0048] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0049] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0050] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0052] Please refer to the following: Figures 1 to 11 The ventilation system for tunnel construction provided in this application will now be described. The ventilation system for tunnel construction proposed in this application includes a ventilation box 1, multiple air supply pipes 2, and a movable base 3.

[0053] A venting box 1 is installed at the top of the tunnel entrance, typically at the center of the tunnel's inner ceiling, to ensure it aligns with the main airflow path at the tunnel entrance. The venting box 1 has several air inlets 11 facing outwards from the tunnel; in this embodiment, there are three air inlets 11 arranged horizontally side-by-side. Furthermore, the venting box 1 also has a single air outlet 12 facing inwards from the tunnel, used to expel gas from inside the venting box 1.

[0054] Multiple air supply pipes 2 are arranged along the tunnel construction direction inside the ventilation box 1. The sum of the lengths of the multiple air supply pipes 2 is usually greater than the preset depth of the tunnel. Every two adjacent air supply pipes 2 are interconnected, and the air supply pipes 2 adjacent to the ventilation box 1 are connected to the ventilation box 1 to achieve the technical purpose of exhausting the gas inside the ventilation box 1 into the tunnel.

[0055] Each air supply pipe 2 is connected to a coil assembly 4, which is used to fix it to the top surface inside the tunnel and to roll up or bend the corresponding air supply pipe 2 to shorten the length of the air supply pipe 2 toward the inside of the tunnel, thereby achieving its stable installation on the upper side of the tunnel.

[0056] The movable seat 3 is used to be installed inside the tunnel and fixed to the inner wall or bottom of the tunnel to prevent it from moving relative to the tunnel. The movable seat 3 is equipped with a blower 5, which is connected to the air supply pipe 2 away from the ventilation box 1 to achieve the technical purpose of applying suction to the inside of the air supply pipe 2. Specifically, when the blower 5 is started, the gas in the ventilation box 1 enters the blower 5 through multiple air supply pipes 2 and is discharged into the tunnel.

[0057] In this embodiment, the blower 5 generates suction, forming an airflow that enters the ventilation box 1 from the air inlet 11 and then passes through multiple air supply pipes 2. The airflow is discharged into the tunnel through the blower 5 to achieve tunnel ventilation. During tunnel construction, the coil assembly 4 can adjust the length of the corresponding air supply pipe 2 along the construction direction to ensure orderly gas delivery. As construction progresses and the tunnel goes deeper, the position of the blower 5 can be changed synchronously by changing the position of the movable seat 3, thereby changing the working range of the blower 5 and ensuring ventilation and oxygen supply deep within the tunnel.

[0058] The ventilation system for tunnel construction provided in this embodiment, compared with the prior art, can adjust the propagation range of the airflow formed by the ventilation system to ensure sufficient oxygen content in the tunnel at each stage of tunnel construction, thereby improving the safety of the tunnel construction process.

[0059] In some embodiments, such as Figures 9 to 11 As shown, the coil assembly 4 includes a top plate 41, a bottom plate 42, and multiple levers 43.

[0060] The top plate 41 is used to be fixedly installed on the top surface inside the tunnel. Usually, a sinking groove is set on the top surface inside the tunnel, and the top plate 41 is fixedly embedded in the sinking groove.

[0061] The base plate 42 is located below the top plate 41 and is connected to the top plate 41 via multiple connecting rods 411. During use, the top plate 41 and the base plate 42 can be separated by removing the connecting rods 411, thus achieving a detachable connection between the top plate 41 and the base plate 42. After the top plate 41 and the base plate 42 are connected, a pipe passage space is formed between the top plate 41 and the base plate 42, and the corresponding air supply pipe 2 is located inside the pipe passage space.

[0062] Multiple levers 43 are arranged side by side in the horizontal direction within the pipe passage space. Specifically, the multiple levers 43 are arranged at intervals along the length of the air supply pipe 2 and are alternately arranged on both sides of the width of the air supply pipe 2.

[0063] Each lever 43 is connected to the top plate 41 or the bottom plate 42 via an elastic reset member 431 (in this application, for ease of adjustment, the lever 43 is connected to the bottom plate 42 via an elastic reset member 431).

[0064] In actual use, the elastic reset member 431 is used to drive the lever 43 to move toward the air supply pipe 2, so that the air supply pipe 2 bends along its own width direction to form a wave-shaped structure, thereby reducing its overall length in the tunnel depth direction.

[0065] In some embodiments, such as Figures 9 to 11 As shown, the lever 43 passes through the base plate 42 and extends outward, and a guide rod 421 is fixedly provided on the lower side of the base plate 42 and slidably connected to the extended end of the lever 43; specifically, a slider is fixedly connected to the extended part of the lever 43, and the guide rod 421 and the slider are slidably connected.

[0066] The elastic reset element 431 is a spring sleeved on the guide rod 421, and the two ends of the spring are respectively connected to one end of the guide rod 421 and the extended end of the lever 43.

[0067] When the air supply pipe 2 is in a straight state, the spring is in an elastic compression state, which is suitable for driving the lever 43 to move and press the air supply pipe 2 into a bent state; when the air supply pipe 2 is in a bent state, the spring is in an elastic compression state or a non-deformation state.

[0068] It should be noted that the air supply duct 2 adopts an overall elastic structure with a relatively rigid inner wall to reduce the deformation of the air supply duct 2 during ventilation, thereby ensuring that the air supply duct 2 can be stably in a bending state.

[0069] In some embodiments, such as Figure 10As shown, the connecting rod 411 is a screw fixedly mounted on the top plate 41. The connecting rod 411 passes through the bottom plate 42 and extends out, and the extended part is threadedly connected to the mating nut 412.

[0070] By adopting the above technical solution, the mating nut 412 is used to abut against the lower side of the base plate 42 to restrict the relative movement of the top plate 41 and the base plate 42.

[0071] In some embodiments, such as Figure 5 , Figure 6 and Figure 11 As shown, two adjacent air supply pipes 2 are connected by a connector 6. Specifically, the end of the air supply pipe 2 has a mating plate extending radially outward. The connector 6 is made of rubber and is fitted on the outside of the two overlapping mating plates to ensure the fit of the two mating plates and the connection between the two air supply pipes 2.

[0072] The outer side of the connector 6 is provided with a positioning ring 61, the axial direction of which is parallel to the axial direction of the connector 6; the base plate 42 is provided with an elastic clip 422 for engaging in the positioning ring 61. Normally, the elastic clip 422 is hinged to the lower side of the base plate 42 in the vertical direction.

[0073] By adopting the above technical solution, construction personnel can snap the elastic clip 422 into the positioning ring 61 so that the air supply pipe 2 inside the corresponding pipe space is fixed in a bent state, thereby avoiding the impact caused by the straightening of other air supply pipes 2 inside due to traction.

[0074] In some embodiments, such as Figure 1 and Figure 7 As shown, the blower 5 and the air supply pipe 2 are connected by an L-shaped connector 7 so that when the air supply pipe 2 is at the center of the tunnel ceiling, both the blower 5 and the movable base 3 can be set on the side of the tunnel to avoid affecting the movement of personnel and the handling of equipment in the tunnel.

[0075] In some embodiments, such as Figure 7 As shown, the movable seat 3 includes a support platform 31 and a sliding arm 32.

[0076] The support platform 31 is used to fix it to the bottom surface of the tunnel. The aforementioned blower 5 is set on the top of the support platform 31 and has a gap between it and the top surface of the tunnel.

[0077] The sliding arm 32 is located on the upper side of the blower 5 and is used to fill the aforementioned gap, and is slidably connected to the top surface inside the tunnel.

[0078] In some embodiments, such as Figure 1 As shown, the ventilation system also includes several guide rails 8; such as Figure 1As shown, one guide rail 8 is provided and fixed to the inner top surface of the tunnel by a sunken installation structure. When there are multiple guide rails 8, the multiple guide rails 8 are arranged along the tunnel construction direction and on the inner top surface of the tunnel.

[0079] Based on the foregoing, the sliding arm 32 is slidably connected to the guide rail 8 and is adapted to slide from any one of the guide rails 8 to the adjacent guide rail 8 to ensure that construction personnel can push the movable seat 3.

[0080] In some embodiments, such as Figure 7 and Figure 8 As shown, the support platform 31 also includes a positioning sleeve 9, which slides on the support platform 31 in the vertical direction to find the weak point on the inner side of the tunnel.

[0081] The positioning sleeve 9 has an alignment plate 91 facing the inner side of the tunnel. The alignment plate 91 has a through hole 911, and a fixing pile 912 for inserting into the weak point of the inner side of the tunnel is inserted into the through hole 911 to limit the position of the support platform 31.

[0082] In some embodiments, such as Figures 2 to 4 As shown, each air inlet 11 is connected to an air guide 10; specifically, the air guide 10 is fixedly installed on the outer side of the ventilation box 1 and is connected to the corresponding air inlet 11.

[0083] In the direction of the air inlet 11 away from the inner cavity of the ventilation box 1, the inner diameter of the air guide 10 gradually increases to form a funnel-shaped structure, thereby ensuring the smooth flow of gas entering the ventilation box 1.

[0084] Furthermore, a filter 101 is fixedly installed inside the air guide 10. The filter 101 is used to intercept impurities in the air, thereby preventing impurities from affecting ventilation.

[0085] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A ventilation system for tunnel construction, characterized in that, include: A ventilation box is used to be installed on the top of the tunnel entrance; the ventilation box has several air inlets facing outwards from the tunnel and air outlets facing inwards from the tunnel. Multiple air supply pipes are arranged along the tunnel construction direction inside the ventilation box; two adjacent air supply pipes are interconnected, and the air supply pipe adjacent to the ventilation box is connected to the ventilation box; each air supply pipe is connected to a coil assembly, which is used to wind or bend the air supply pipe to shorten the length of the air supply pipe toward the inside of the tunnel. as well as A movable base is used to be installed inside the tunnel and to be fixed to the tunnel wall or bottom; a blower is installed on the movable base, and the blower is connected to the air supply pipe away from the ventilation box; When the blower is started, the gas in the ventilation box enters the blower through multiple air supply pipes and is discharged into the tunnel.

2. The ventilation system for tunnel construction as described in claim 1, characterized in that, The coil assembly includes: Top plate, used to be fixedly installed on the top surface inside the tunnel; A base plate, disposed below the top plate, and detachably connected to the top plate via multiple connecting rods, forms a ductwork space between the top plate and the base plate; the air supply duct is disposed within the ductwork space; and Multiple levers are arranged within the duct space; the multiple levers are spaced apart along the length of the air supply duct and alternately arranged on both sides of the width of the air supply duct; each lever is connected to the top plate or the bottom plate through an elastic reset member, the elastic reset member being used to drive the lever to move toward the air supply duct, so that the air supply duct bends along its own width direction to form a wave-shaped structure.

3. The ventilation system for tunnel construction as described in claim 2, characterized in that, The lever passes through the base plate and extends outwards, and a guide rod is fixedly provided on the lower side of the base plate and slidably connected to the extended end of the lever; The elastic reset component is a spring sleeved on the guide rod, and the two ends of the spring are respectively connected to one end of the guide rod and the extended end of the lever; When the air supply pipe is in a straight state, the spring is in an elastically compressed state to facilitate the movement of the lever; when the air supply pipe is in a bent state, the spring is in an elastically compressed state or a non-deformed state.

4. The ventilation system for tunnel construction as described in claim 2, characterized in that, The connecting rod is a screw fixedly mounted on the top plate. The connecting rod passes through the bottom plate and extends outwards, and the extended part is threadedly connected to a mating nut. The mating nut is used to abut against the lower side of the bottom plate to limit the relative movement of the top plate and the bottom plate.

5. The ventilation system for tunnel construction as described in any one of claims 2-4, characterized in that, The two adjacent air supply pipes are connected by a pipe connector; The outer side of the connector is provided with a positioning ring, and the base plate is provided with an elastic clip for engaging with the positioning ring. When the elastic clip engages with the positioning ring, the air supply pipe inside the corresponding pipe space is fixed in a bent state.

6. The ventilation system for tunnel construction as described in claim 1, characterized in that, The blower and the air supply pipe are connected by an L-shaped connector, so that when the air supply pipe is at the center of the tunnel ceiling, both the blower and the movable base can be set on the side of the tunnel.

7. The ventilation system for tunnel construction as described in claim 1 or 6, characterized in that, The movable seat includes: A support platform is provided for installation on the bottom surface of the tunnel, and the blower is installed on top of the support platform with a gap between it and the top surface of the tunnel. A sliding arm is disposed on the upper side of the blower and is used to slide in connection with the top surface of the tunnel.

8. The ventilation system for tunnel construction as described in claim 7, characterized in that, The ventilation system also includes: A plurality of guide rails are arranged along the tunnel construction direction on the tunnel top surface. The sliding arm is slidably connected to the guide rails and is adapted to slide from any one of the guide rails to the adjacent guide rail.

9. The ventilation system for tunnel construction as described in claim 7, characterized in that, The support platform also includes: A positioning sleeve is slidably fitted onto the support platform in the vertical direction; the positioning sleeve has an alignment plate for facing the inner side of the tunnel, the alignment plate has a through hole, and a fixing pile for inserting into the inner side of the tunnel is inserted into the through hole.

10. The ventilation system for tunnel construction as described in claim 1, characterized in that, Each of the air inlets is connected to an air guide; The air guide is fixedly installed on the outer side of the ventilation box; in the direction of the air inlet away from the inner cavity of the ventilation box, the inner diameter of the air guide gradually increases to form a funnel-shaped structure. The air guide component is equipped with a filter screen, which is used to intercept impurities in the air.

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