Air flow reverser for driving working face

Abstract

The air flow reverser is of a shell structure, an air inlet is formed in the side, away from the head-on side of the working face, of the air flow reverser, an air outlet is formed in the side, close to the head-on side of the working face, of the air flow reverser, and an adjusting opening is formed in the side, facing the side wall of a roadway, of the air flow reverser. An air inlet of the air flow reverser is communicated with the roadway air duct, an air outlet of the air flow reverser is used for directly sending part of fresh air out of the air flow reverser and blowing the fresh air to the working face, and an adjusting opening of the air flow reverser is used for conveying the other part of fresh air to the side, away from the air flow reverser, of the roadway and blowing the fresh air to the working face. Dust is pressed on the head of the working face and is forced to be sucked away under the action of negative pressure; the device is suitable for conveying fresh air from one side of a roadway to a working face when the dust removal fan stops working, gas is prevented from exceeding the limit, fresh air can be conveyed from the two sides of the roadway to the working face when the dust removal fan normally works, and then dust collection work is completed in a matched mode.

Description

Technical Field

[0001] The utility model belongs to the field of underground engineering excavation construction, in particular to an air flow reversing device used for an excavation working face. Background Art

[0002] To control dust at the tunneling face, it's necessary to control or restrict the incoming airflow. This control or targeted flow directs dust to the dust collection equipment for dust removal. In this case, the fresh air needs to be diverted. When the dust collection fan is stopped, the airflow must be directed completely straight ahead to prevent gas accumulation at the face.

[0003] Existing wall-mounted ducts have openings on the side of the hanging duct, which can achieve lateral diversion. Although lateral diversion is effective for dust removal, the lateral diversion cannot be synchronized with the tunneling process, resulting in a very long dust removal duct. In addition, the layout of the dust removal fan cannot be synchronized with the tunneling machine, which affects production efficiency. Therefore, the lateral airflow formed by the opening on the side of the hanging duct only has a positive effect when the dust removal fan is working. When the dust removal fan stops working, the lateral airflow can easily cause airflow chaos and lead to safety hazards. In addition, the lateral airflow control of the wall-mounted duct requires manual control, which has problems such as complex construction technology and the inability to adapt and convert the airflow in time, which in turn affects production and poses safety hazards. Summary of the Invention

[0004] The purpose of the utility model is to provide an airflow reversing device for an excavation working face, which is suitable for delivering fresh air from one side of the tunnel to the working face when the dust removal fan stops working, and can also deliver fresh air from both sides of the tunnel to the working face when the dust removal fan is working normally, thereby cooperating to complete the dust collection work.

[0005] The utility model adopts the following technical solution: an air flow diverter for an excavation working face, the air flow diverter is a shell structure, an air inlet is provided on the side away from the front of the working face, an air outlet is provided on the side close to the front of the working face, and an adjustment port is provided on the side facing the side wall of the tunnel;

[0006] The air inlet of the air flow reversing device is connected to the tunnel air duct. Its air outlet is used to directly send part of the fresh air out of the air flow reversing device and blow it toward the working face. Its regulating port is used to transport the other part of the fresh air to the side of the tunnel away from the air flow reversing device and blow it toward the working face. In this way, the dust on the working face is pressurized from both sides of the tunnel, pressing the dust against the working face and forcing the dust to be sucked away under the action of negative pressure.

[0007] An adjustment mechanism is provided in the airflow reversing device, which is used to adjust the air volume of the fresh air passing through the adjustment port, and then adjust the air volume on both sides of the alley.

[0008] Furthermore, an air flow reversing device is provided on one side of the alley, and an air distribution box is provided on the other side of the alley. The regulating port of the air flow reversing device is connected to the air distribution box through a connecting air duct. The connecting air duct is used to transport the fresh air in the air flow reversing device to the air distribution box, and then blow the fresh air toward the working face through the air distribution box, so as to pressurize the dust on the working face from both sides of the alley, forcing the dust to be sucked away.

[0009] Furthermore, the regulating mechanism includes:

[0010] The turning door plate is arranged near the regulating port, and one side thereof is fixedly connected to the rotating shaft sleeved on the air flow reversing housing;

[0011] a connecting plate, one end of which is fixedly connected to the lower end of the rotating shaft;

[0012] The hydraulic cylinder is located at the bottom of the airflow reversing device, with its fixed end fixed at the bottom of the airflow reversing device and its movable end hinged to the other end of the connecting plate, and is used to pull the other end of the connecting plate to move left and right, thereby rotating the rotating shaft and rotating the steering door panel.

[0013] Furthermore, the regulating mechanism further comprises:

[0014] The left side of the positioning slide rests against the movable end of the hydraulic cylinder; the right side is fixedly connected to the left end of the screw rod, and the right end of the screw rod is fixed to the bottom of the airflow reversing device. The positioning slide is used to rest against the movable end of the hydraulic cylinder, thereby limiting the hydraulic cylinder so that the steering door panel remains at a certain opening.

[0015] Furthermore, two symmetrically arranged ear rods are fixedly connected to the lower side of the positioning slide;

[0016] The regulatory body also includes:

[0017] The bottom rail is fixed at the bottom of the inner cavity of the airflow reversing device. It is a strip-shaped rectangular frame with strip grooves on both longer sides. The two strip grooves are used for the two ear rods of the positioning slide to extend into, so that the positioning slide moves back and forth along the direction of the strip groove under the drive of the screw rod.

[0018] Furthermore, the lower side of the air flow diverter is fixed on the top of the tunnel boring machine and away from the working surface.

[0019] The beneficial effects of the utility model are:

[0020] The utility model is suitable for delivering fresh air from one side of the lane to the working face when the dust removal fan stops working and avoids gas exceeding the limit. It can also deliver fresh air from both sides of the lane to the working face when the dust removal fan is working normally, thereby cooperating to complete the dust collection work.

[0021] The utility model can adjust the fresh air quantity passing through the regulating port by setting the regulating mechanism, thereby adjusting when the dust removal fan stops working or works normally, and balancing the air flow and the air flow direction;

[0022] The utility model can move forward synchronously with the tunnel boring machine, thereby obtaining power supply from the tunnel boring machine to realize automatic control; it can ensure that the effectiveness of ventilation and dust removal in the area where the tunnel boring machine is located will not be affected by the movement of the tunnel boring working face; the balance of air flow matching ensures that the dust on the tunnel boring head will not escape to a distance far from the working face;

[0023] The utility model is installed on the tunnel boring machine, and realizes the synchronous advancement of the fresh air flow and the tunnel boring machine. It can not only overcome the distance limitation between the fresh air outlet and the head direction stipulated by the safety regulations that the existing technology cannot meet, but also obtain power supply to realize automatic control; the adjustment mechanism can also be linked with the dust removal fan to improve the dust removal efficiency and avoid the safety hazards caused by human errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural diagram of the utility model;

[0025] Figure 2 It is a structural diagram of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the adjustment mechanism of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the adjustment mechanism of the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the adjustment mechanism of the utility model;

[0029] Figure 6 This is a schematic diagram of the installation position of the utility model;

[0030] Figure 7 This is a schematic diagram of the installation position of the utility model.

[0031] Among them: 100, airflow reversing device; 102, air inlet; 103, air outlet; 104, air duct; 106, steering door panel; 107, rotating shaft; 108, connecting plate; 109, screw rod; 110, positioning slide; 111, hydraulic cylinder; 112, ear rod; 113, bottom rail; 114, strip groove; 115, air distribution box; 200, tunnel boring machine. DETAILED DESCRIPTION

[0032] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more. The "direction" in the present invention is based on the position of the present invention in the direction of the present invention. Figure 1 Description of the direction of the state.

[0034] The utility model discloses a wind flow reversing device for excavation working face, such as Figure 1 and 2 As shown, the air flow reversing device 100 is a shell structure, an air inlet 102 is provided on the side of the air flow reversing device 100 away from the working surface, an air outlet 103 is provided on the side of the air flow reversing device 100 close to the working surface, and an adjustment port is provided on the side of the air flow reversing device 100 facing the side wall of the tunnel.

[0035] The air inlet 102 of the air flow reversing device 100 is connected to the wind duct of the tunnel, and the air outlet 103 of the air flow reversing device 100 is used to directly send a part of the fresh air out of the air flow reversing device 100 and blow it toward the working face. The regulating port of the air flow reversing device 100 is used to transport another part of the fresh air to the side of the tunnel away from the air flow reversing device 100 and blow it toward the working face, thereby pressurizing the dust on the working face from both sides of the tunnel, suppressing the dust in front of the working face and forcing the dust to be sucked away under the action of negative pressure; an adjusting mechanism is provided in the air flow reversing device 100, and the adjusting mechanism is used to adjust the air volume of the fresh air passing through the regulating port, thereby adjusting the air volume on both sides of the tunnel.

[0036] like Figure 6 and 7 As shown, the lower side of the airflow reversing device 100 is fixed to the top of the tunnel boring machine 200, away from the working face. The airflow reversing device 100 is installed on one side of the roadway, and a distribution air box 115 is installed on the other side of the roadway. The regulating port of the airflow reversing device 100 is connected to the distribution air box 115 via a connecting air duct 104. The connecting air duct 104 is used to transport the fresh air in the airflow reversing device 100 to the distribution air box 115. The distribution air box 115 then blows the fresh air toward the working face, thereby pressurizing the dust on the working face from both sides of the roadway and forcing the dust to be sucked away.

[0037] like Figure 3-5 As shown, the adjustment mechanism includes: a steering door plate 106 , a connecting plate 108 , and a hydraulic cylinder 111 .

[0038] The steering door plate 106 is arranged close to the adjustment port, and one side of the steering door plate 106 is fixedly connected to the rotating shaft 107 mounted on the shell of the airflow reversing device 100; one end of the connecting plate 108 is fixedly connected to the lower end of the rotating shaft 107; the hydraulic cylinder 111 is located at the bottom of the airflow reversing device 100, and the fixed end of the hydraulic cylinder 111 is fixed to the bottom of the airflow reversing device 100. The movable end of the hydraulic cylinder 111 is hinged to the other end of the connecting plate 108. The hydraulic cylinder 111 is used to pull the other end of the connecting plate 108 to move left and right, thereby causing the rotating shaft 107 to rotate, and then rotating the steering door plate 106.

[0039] The adjustment mechanism also includes: a positioning slide 110, the left side of the positioning slide 110 is against the movable end of the hydraulic cylinder 111; the right side of the positioning slide 110 is fixedly connected to the left end of the screw rod 109, and the right end of the screw rod 109 is fixed to the bottom of the airflow reversing device 100. The positioning slide 110 is used to press against the movable end of the hydraulic cylinder 111, thereby limiting the hydraulic cylinder 111 so that the steering door panel 106 is maintained at a certain opening.

[0040] Two symmetrically arranged ear rods 112 are fixedly connected to the lower side of the positioning slide 110; the adjustment mechanism also includes: a bottom rail 113, the bottom of the bottom rail 113 is fixed to the bottom of the inner cavity of the airflow reversing device 100, the bottom rail 113 is a strip-shaped rectangular frame, and the longer sides of the bottom rail 113 are provided with strip grooves 114, and the two strip grooves 114 are used for the two ear rods 112 of the positioning slide 110 to extend into, so that the positioning slide 110 can move back and forth along the direction of the strip groove 114 under the drive of the screw rod 109.

[0041] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wind flow diverter for a tunneling working face, characterized in that: The airflow reversing device (100) is a shell structure, with an air inlet (102) provided on the side away from the front of the working surface, an air outlet (103) provided on the side close to the front of the working surface, and an adjustment port provided on the side facing the side wall of the tunnel; The air inlet (102) of the air flow reversing device (100) is connected to the tunnel wind tube, and the air outlet (103) thereof is used to directly send a portion of the fresh air out of the air flow reversing device (100) and blow it toward the working surface, and the regulating port is used to transport the other portion of the fresh air to the side of the tunnel away from the air flow reversing device (100) and blow it toward the working surface, thereby pressurizing the dust on the working surface from both sides of the tunnel, pressing the dust against the working surface and forcing the dust to be sucked away under the action of negative pressure; The airflow reversing device (100) is provided with an adjusting mechanism, and the adjusting mechanism is used to adjust the air volume of the fresh air passing through the adjusting port, thereby adjusting the air volume on both sides of the lane.

2. The air flow diverter for a tunneling working face according to claim 1, characterized in that: The wind flow reversing device (100) is arranged on one side of the lane, and a wind distribution box (115) is arranged on the other side of the lane. The regulating port of the wind flow reversing device (100) is connected to the wind distribution box (115) via a connecting air duct (104). The connecting air duct (104) is used to transport the fresh air in the wind flow reversing device (100) to the wind distribution box (115), and then the fresh air is blown toward the working surface through the wind distribution box (115), so as to pressurize the dust on the working surface from both sides of the lane, forcing the dust to be sucked away.

3. The air flow diverter for a tunneling working face according to claim 2, characterized in that: The regulating mechanism comprises: A turning door plate (106) is provided near the regulating port, one side of which is fixedly connected to a rotating shaft (107) sleeved on the housing of the airflow reversing device (100); a connecting plate (108), one end of which is fixedly connected to the lower end of the rotating shaft (107); The hydraulic cylinder (111) is located at the bottom of the wind flow reversing device (100), with its fixed end fixed to the bottom of the wind flow reversing device (100) and its movable end hinged to the other end of the connecting plate (108) for pulling the other end of the connecting plate (108) to move left and right, thereby rotating the rotating shaft (107) and rotating the steering door panel (106).

4. The air flow diverter for a tunneling working face according to claim 3, characterized in that: The regulating mechanism further comprises: The bottom rail (113) is fixed at the bottom of the inner cavity of the airflow reversing device (100) and is a strip-shaped rectangular frame. The two longer sides of the bottom rail (113) are provided with strip-shaped grooves (114). The two strip-shaped grooves (114) are used for the two symmetrically arranged ear rods (112) fixedly connected to the lower side of the positioning slide (110) to extend therein, thereby allowing the positioning slide (110) to move back and forth along the direction of the strip-shaped grooves (114) under the drive of the screw rod (109).

5. The air flow diverter for a tunneling working face according to claim 1, characterized in that: The lower side of the wind flow reversing device (100) is fixed on the top of the roadheader (200) and on a side away from the working surface.

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