Rapid contraction device for tunnel wind zone

Abstract

The utility model discloses a tunnel wind zone rapid contraction device which comprises a steel rope parallel to a tunnel and arranged at the top of the tunnel, the top of the steel rope is fixedly connected with the inner top of the tunnel through anchor bars, the anchor bars are arranged at equal intervals, and a wind zone safe contraction distance is arranged between the adjacent anchor bars at one end, close to a tunnel face, of the steel rope. The ends of the wind belts are connected with the steel ropes through fixing assemblies walking along the steel ropes, and the middles of the wind belts are connected with the steel ropes through movable sliding buckles arranged at equal intervals. The effect of improving the use safety of the wind belt and the intelligence of wind belt state switching is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of contraction devices, in particular to a tunnel wind belt rapid contraction device. Background Art

[0002] During tunnel construction, the task of the tunnel wind belt is ventilation. First, it provides sufficient fresh air for the personnel in the tunnel to meet their oxygen needs; second, it dilutes and removes toxic and harmful gases and dust underground in the tunnel to reach the specified concentration; third, it creates good climatic conditions for underground tunnels. With the increasing requirements for environment and health, the distance between the wind belt opening and the working face is getting closer and closer, generally 20m-30m. This also makes it extremely easy to damage the wind belt during tunnel excavation and blasting, and then the wind belt needs to be replaced or repaired, which greatly affects the progress of the project construction and increases the construction cost. Summary of the invention

[0003] The technical problem to be solved by the utility model is that the wind belt is easily damaged during the tunnel construction process.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a tunnel wind belt rapid retraction device, including a steel rope parallel to the tunnel and arranged at the top of the tunnel, the top of the steel rope is fixedly connected to the top of the tunnel by anchor bars, the anchor bars are arranged equidistantly, and a wind belt safety retraction distance is set between adjacent anchor bars at one end of the steel rope close to the tunnel face, the end of the wind belt is connected to the steel rope by a fixed component running along the steel rope, and the middle part of the wind belt is connected to the steel rope by movable sliding buckles arranged equidistantly.

[0005] Preferably, the fixing assembly includes a rectangular mounting frame sleeved on the steel rope, the mounting frame is provided with a driving wheel and a locking wheel for clamping the steel rope, the driving wheel is connected to the output shaft of the driving motor, and the side walls of the locking wheel are respectively provided with a serrated locking block and a smooth sliding block.

[0006] Preferably, the driving wheel and the locking wheel are arranged perpendicular to the steel rope, an arc-shaped groove is provided in the middle of the driving wheel, and a friction belt is obliquely arranged on the inner wall of the arc-shaped groove.

[0007] Preferably, the driving wheel is rotatably connected to the driving frame, the driving frame is vertically slidably connected to the mounting frame, a spring is connected between the top of the driving frame and the inner top of the mounting frame, and the spring is sleeved on the mounting frame.

[0008] Preferably, the locking wheel is rotatably connected to the locking frame, the locking frame is vertically slidably connected to the guide rod at the bottom of the mounting frame, the bottom surface of the locking frame contacts the nut on the guide rod, an adjusting bolt is threadedly connected to one side of the locking frame, the adjusting bolt radially passes through the mounting shaft of the locking wheel, the locking wheel is fixed on the mounting shaft, and the locking block and the sliding block are located on opposite side walls of the locking wheel.

[0009] Preferably, the movable slider is elliptical and is mounted on the steel rope, and the inner wall of the movable slider is smooth.

[0010] 1. The utility model provides a rapid retraction device for a tunnel wind belt, which adopts a fixed component and a movable slide buckle to connect with the wind belt and a steel rope. When the wind belt needs to be put away, the fixed component is loosened and controlled to drive the wind belt to retract, and then the fixed component is used to fix it, and the movable slide buckle is used to realize the rapid retraction and recovery of the wind belt.

[0011] 2. A driving wheel is arranged in the fixed component, and the driving wheel is driven to rotate by a driving motor. A DC power supply is arranged on the mounting frame. By controlling the forward or reverse rotation of the driving motor, the fixed component drives the end of the wind belt to move, and the automatic switching of the working state and the retracted state of the wind belt is realized.

[0012] 3. By adjusting the contact surface between the locking wheel and the steel rope, switching between the locking block and the sliding block, the locking block cooperates with the steel rope to achieve locking of the fixed component on the steel rope, and the sliding block cooperates with the steel rope to achieve sliding of the fixed component on the steel rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 It is a front view of the embodiment of the utility model in working state.

[0015] Figure 2 It is a front view of the embodiment of the utility model in a retracted state.

[0016] Figure 3 It is a structural schematic diagram of the fixing assembly in the embodiment of the utility model.

[0017] Figure 4 It is a schematic diagram of the structure of the movable slider in the embodiment of the utility model.

[0018] Figure 5 It is an enlarged view of the fixing component in the embodiment of the utility model.

[0019] In the figure: 1. anchor bar; 2. steel rope; 3. movable slide buckle; 4. fixing assembly; 41. mounting frame; 42. driving frame; 43. driving wheel; 44. driving motor; 45. spring; 46. locking frame; 47. locking wheel; 471. locking block; 472. sliding block; 48. adjusting bolt; 5. air belt. DETAILED DESCRIPTION

[0020] like Figure 1-5The utility model provides a tunnel wind belt rapid retraction device, comprising a steel rope 2 parallel to the tunnel and arranged at the top of the tunnel, the top of the steel rope 2 is fixedly connected to the top of the tunnel through anchor bars 1, the anchor bars 1 are arranged at equal intervals, and a wind belt 5 safety retraction distance is arranged between adjacent anchor bars 1 at one end of the steel rope 2 close to the tunnel face, the end of the wind belt 5 is connected to the steel rope 2 through a fixing component 4 running along the steel rope 2, and the middle of the wind belt 5 is connected to the steel rope 2 through movable sliding buckles 3 arranged at equal intervals.

[0021] The wind belt 5 is connected to the steel rope 2 through the fixing assembly 4 and the movable sliding buckles 3 arranged at equal intervals. The steel rope 2 is provided with 50m between the adjacent anchor bars 1 at one end close to the tunnel face. The anchor bars 1 and the steel rope 2 are welded to ensure the stability of the steel rope 2.

[0022] When switching the working state and the retracted state of the wind belt 5, first loosen the fixing component 4, and then push the end of the wind belt 5 to move along the steel rope 2 to retract the wind belt 5. After the end of the wind belt 5 moves to the set position, lock the fixing component 4 on the steel rope 2 to prevent the fixing component 4 from axial movement on the steel rope 2.

[0023] like Figure 5 The fixing assembly 4 comprises a rectangular mounting frame 41 sleeved on the steel rope 2, a driving wheel 43 and a locking wheel 47 for clamping the steel rope 2 are arranged in the mounting frame 41, the driving wheel 43 is connected to the output shaft of the driving motor 44, and the side walls of the locking wheel 47 are respectively provided with a locking block 471 with serrations and a smooth sliding block 472.

[0024] The mounting frame 41 includes a horizontal plate at the top and guide rods connecting the two ends of the bottom surface of the horizontal plate. The guide rods are made of hollow pipes. The driving motor 44 can be powered by a DC power supply or by external wires. The power supply wires pass through the movable slider 3 and are equidistantly supported by the movable slider 3. The movable slider 3 can still support the power supply wires when the wind belt 5 is contracted and relaxed.

[0025] When the wind belt 5 is in the working state and the retracted state, the locking block 471 of the locking wheel 47 contacts with the steel rope 2, bites on the steel rope 2, and cooperates with the driving wheel 43 to clamp the steel rope 2, and the fixed component 4 cannot move relative to the steel rope 2; during the switching process of the wind belt 5, the sliding block 472 of the locking wheel 47 contacts with the steel rope 2, and when the driving wheel 43 rotates, it can drive the fixed component 4 to move on the steel rope 2.

[0026] As a preferred embodiment of the utility model, in order to increase the friction between the driving wheel 43 and the steel rope 2 and avoid slipping during the rotation of the driving wheel 43, the driving wheel 43 and the locking wheel 47 are arranged perpendicular to the steel rope 2, and an arc groove is arranged in the middle of the driving wheel 43, and a friction belt is arranged obliquely on the inner wall of the arc groove. Due to the strength requirements, the steel rope 2 is in the form of a twisted steel rope, and the friction belt on the driving wheel 43 can provide sufficient friction.

[0027] like Figure 5 As shown, to ensure that the driving wheel 43 is in close contact with the steel rope 2. The driving wheel 43 is rotatably connected to the driving frame 42, and the driving frame 42 is vertically slidably connected to the mounting frame 41. A spring 45 is connected between the top of the driving frame 42 and the top of the mounting frame 41, and the spring 45 is sleeved on the mounting frame 41. When the driving wheel 43 rotates, sufficient pressure is required to ensure that the dynamic friction force can support the driving wheel 43 to move on the steel rope 2. After the driving wheel 43 stops rotating, sufficient static friction force is required to prevent the fixing component 4 from moving on the steel rope 2.

[0028] like Figure 5 The locking wheel 47 is rotatably connected to the locking frame 46, and the locking frame 46 is vertically slidably connected to the guide rod at the bottom of the mounting frame 41. The bottom surface of the locking frame 46 contacts the nut on the guide rod. An adjusting bolt 48 is threadedly connected to one side of the locking frame 46. The adjusting bolt 48 radially passes through the mounting shaft of the locking wheel 47. The locking wheel 47 is fixed on the mounting shaft. The locking block 471 and the sliding block 472 are located on the opposite side walls of the locking wheel 47.

[0029] When adjusting the locking wheel 47, the adjusting bolt 48 is unscrewed from the locking frame 46, and the nut on the guide rod is rotated to loosen the locking wheel 47, so that the locking wheel 47 is separated from the steel rope 2, and then the locking wheel 47 is rotated half a circle so that the locking block 471 or the sliding block 472 of the locking wheel 47 contacts the steel rope 2, and then the locking frame 46 and the adjusting bolt 48 are locked to adjust the state of the locking wheel 47.

[0030] like Figure 4 The movable slider 3 is oval and is mounted on the steel rope 2, and the inner wall of the movable slider 3 is smooth. The movable slider 3 includes two oval connecting rings, and the connecting ring at the bottom is used to insert the power supply wire of the driving motor 44.

Claims

1. A tunnel wind belt rapid contraction device, characterized in that: It comprises a steel rope (2) parallel to the tunnel and arranged at the top of the tunnel, the top of the steel rope (2) is fixedly connected to the top of the tunnel through anchor bars (1), the anchor bars (1) are arranged at equal intervals, a wind belt (5) safety retraction distance is arranged between adjacent anchor bars (1) at one end of the steel rope (2) close to the tunnel face, the end of the wind belt (5) is connected to the steel rope (2) through a fixed component (4) running along the steel rope (2), and the middle of the wind belt (5) is connected to the steel rope (2) through movable sliding buckles (3) arranged at equal intervals; The fixing assembly (4) comprises a rectangular mounting frame (41) sleeved on the steel rope (2), a driving wheel (43) and a locking wheel (47) for clamping the steel rope (2) being arranged inside the mounting frame (41), the driving wheel (43) being connected to the output shaft of the driving motor (44), and a locking block (471) with saw teeth and a smooth sliding block (472) being arranged on the side walls of the locking wheel (47).

2. A tunnel wind belt rapid retraction device as claimed in claim 1, characterized in that: The driving wheel (43) and the locking wheel (47) are both arranged perpendicular to the steel rope (2); an arc-shaped groove is provided in the middle of the driving wheel (43); and a friction belt is obliquely arranged on the inner wall of the arc-shaped groove.

3. A tunnel wind belt rapid contraction device as claimed in claim 2, characterized in that: The driving wheel (43) is rotatably connected to the driving frame (42), the driving frame (42) is vertically slidably connected to the mounting frame (41), a spring (45) is connected between the top of the driving frame (42) and the inner top of the mounting frame (41), and the spring (45) is sleeved on the mounting frame (41).

4. A tunnel wind belt rapid contraction device as claimed in claim 1, characterized in that: The locking wheel (47) is rotatably connected to the locking frame (46), the locking frame (46) is vertically slidably connected to the guide rod at the bottom of the mounting frame (41), the bottom surface of the locking frame (46) contacts the nut on the guide rod, one side of the locking frame (46) is threadedly connected to an adjusting bolt (48), the adjusting bolt (48) radially passes through the mounting shaft of the locking wheel (47), the locking wheel (47) is fixed on the mounting shaft, and the locking block (471) and the sliding block (472) are located on opposite side walls of the locking wheel (47).

5. A tunnel wind belt rapid contraction device as claimed in claim 1, characterized in that: The movable sliding buckle (3) is elliptical and is sleeved on the steel rope (2); the inner wall of the movable sliding buckle (3) is smooth.

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