Roadway tunneling support forepoling protection mechanism

Abstract

The utility model relates to the technical field of roadway tunneling supports, and discloses a roadway tunneling support forepoling protection mechanism which comprises a first protection net frame, two symmetrical fixing blocks are arranged at one end of the first protection net frame, protection mechanisms are arranged on the faces, close to each other, of the two fixing blocks, and a second protection net frame is arranged at the bottom of the first protection net frame. Adjusting mechanisms for adjusting the position of the second protective net frame are arranged at the two ends of the second protective net frame, a driving device for driving the adjusting mechanisms is arranged at one end of one fixing block, and each adjusting mechanism comprises two symmetrical mounting blocks fixed to the bottom of the first protective net frame. When the motor runs, the first bevel gear can drive the first lead screw to rotate, the first sliding block can drive the second protection net frame to move, the length of the second protection net frame can be adjusted, and then the effect of automatically adjusting the length area of the first protection net frame is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel excavation supports, in particular to a forward exploration protection mechanism for a tunnel excavation support. Background Art

[0002] At present, the support methods for the tunnel section of underground coal mines are generally "U"-shaped sheds, trapezoidal sheds, anchor nets or anchor belt nets. The existing technology uses artificial construction to advance the top protection, or uses temporary support devices and airborne temporary support methods to protect the top.

[0003] However, the traditional tunnel excavation support forward protection mechanism has a relatively fixed support area when in use and cannot be adjusted according to actual conditions. When a longer support area is required, the staff will set up multiple support devices, but this operation is relatively costly and wastes resources. Therefore, it is urgent to solve this problem. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a forward exploration protection mechanism for a tunnel excavation support.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A tunnel excavation support forward protection mechanism comprises a first protection grid, one end of which is provided with two symmetrical fixing blocks, and a protection mechanism is provided on the mutually adjacent sides of the two fixing blocks, a second protection grid is provided at the bottom of the first protection grid, and both ends of the second protection grid are provided with adjustment mechanisms for adjusting the position thereof, and one end of one of the fixing blocks is provided with a driving device for driving the adjustment mechanism;

[0007] The adjustment mechanism includes two symmetrical mounting blocks fixed to the bottom of the first protective grid, one end of one of the mounting blocks close to the fixed block is rotatably connected to the first screw rod, and the other end of the mounting block close to the fixed block is fixed to the first guide rod, the outer walls of the first screw rod and the first guide rod are provided with an adaptive first slider, the two first sliders are fixed to the same second protective grid on one side close to each other, and the two sides of the end of the second protective grid close to the fixed block are respectively fixed to the two first sliders in a one-to-one correspondence, and a second telescopic support column is provided at the bottom of the fixed block. When the first screw rod rotates, it will drive the second protective grid to adjust the length to increase the protection area.

[0008] As a further solution of the utility model, a first telescopic support column is provided at the bottom of the second telescopic support column, and jacks are hinged on both sides of the bottom of the first protective grid, and the other end of the jack is hinged to the outer wall of one end of two of the first telescopic support columns, and a driving device is provided on the outer wall of one end of one of the fixed blocks.

[0009] As a further solution of the utility model, the driving device includes a protective cover fixed on one side of the outer wall of one end of the fixed block, a motor is installed on one side of the inner wall of the protective cover, the output shaft of the motor is connected to a bidirectional screw, and a second bevel gear is fixed on the outer wall of the bidirectional screw close to the motor.

[0010] As a further solution of the utility model, one end of the first screw rod passes through one end of one of the fixing blocks and is fixed with a first bevel gear, and the first bevel gear is meshed with the second bevel gear, and a protective mechanism is provided on the sides of the two fixing blocks close to each other.

[0011] As a further solution of the present invention, the protective mechanism includes a second guide rod arranged on the outer wall of one end of another fixed block, the outer walls of the bidirectional screw rod and the second guide rod are both sleeved with a second slider, and the same telescopic protective net is installed on the side close to each other of the two second sliders, and protective net sub-plates are provided on both sides of the inner wall of the telescopic protective net, and third sliders are fixed at both ends of the protective net sub-plate, and four third sliders are respectively adapted to the bidirectional screw rod and the second guide rod. When the protective net sub-plate is fully unfolded, it can prevent falling impurities and hard objects from damaging the bracket.

[0012] As a further solution of the present invention, two fixed beams are fixed to the mutually adjacent sides of the four first telescopic support columns, and the two fixed beams correspond to the four first telescopic support columns in pairs.

[0013] As a further solution of the utility model, guardrails are provided on both side outer walls of the first protective grid, and one end of the first protective grid is rotatably connected to one end of one of the fixed blocks.

[0014] The beneficial effects of the utility model are:

[0015] The utility model: by providing an adjustment mechanism, when the motor is running, the first bevel gear will drive the first screw rod to rotate, and the first slider will drive the second protection grid to move, and the second protection grid will be adjusted in length, thereby achieving the effect of automatically adjusting the length and area of ​​the first protection grid.

[0016] The utility model: by providing a protection mechanism, when the bidirectional screw rod rotates, the bidirectional screw rod will drive two third sliding blocks adapted thereto to move away from each other. When the protection net sub-plate is fully unfolded, it can prevent falling impurities and hard objects from damaging the bracket, thereby achieving the effect of protecting the bracket. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional structural schematic diagram of a forward detection protection mechanism of a tunnel excavation support proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the first partial structure of a forward protection mechanism for a tunnel excavation support proposed by the utility model;

[0019] Figure 3 A second partial structural schematic diagram of a forward exploration protection mechanism of a tunnel excavation support proposed by the utility model;

[0020] Figure 4 A third partial structural schematic diagram of a forward exploration protection mechanism of a tunnel excavation support proposed by the utility model;

[0021] Figure 5 A tunnel excavation support forward protection mechanism proposed by the utility model Figure 4 A in the figure is a schematic diagram of the enlarged structure.

[0022] In the figure: 1. first protective grid; 2. fixed beam; 3. first telescopic support column; 4. guardrail; 5. telescopic protective net; 6. fixed block; 7. jack; 8. second protective grid; 9. first screw rod; 10. first slider; 11. first guide rod; 12. mounting block; 13. protective net sub-plate; 14. second slider; 15. bidirectional screw rod; 16. protective cover; 17. third slider; 18. motor; 19. first bevel gear; 20. second bevel gear; 21. second guide rod; 22. second telescopic support column. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] Reference Figure 1-Figure 5 A tunnel excavation support forward protection mechanism comprises a first protection grid frame 1, one end of the first protection grid frame 1 is provided with two symmetrical fixing blocks 6, and the two fixing blocks 6 are provided with a protection mechanism on the side close to each other, and a second protection grid frame 8 is provided at the bottom of the first protection grid frame 1, and the two ends of the second protection grid frame 8 are provided with an adjustment mechanism for adjusting the position thereof, and one end of one of the fixing blocks 6 is provided with a driving device for driving the adjustment mechanism;

[0026] The adjustment mechanism includes two symmetrical mounting blocks 12 fixed to the bottom of the first protective grid 1, one end of one mounting block 12 close to the fixed block 6 is rotatably connected to the first screw rod 9, and the other end of the mounting block 12 close to the fixed block 6 is fixed to the first guide rod 11, the outer walls of the first screw rod 9 and the first guide rod 11 are both composed of an adaptive first slider 10, and the same second protective grid 8 is fixed on one side of the two first sliders 10 close to each other, and the two sides of the end of the second protective grid 8 close to the fixed block 6 are respectively fixed to the two first sliders 10 one by one, and a second telescopic support column 22 is provided at the bottom of the fixed block 6. When the first screw rod 9 rotates, it will drive the second protective grid 8 to adjust its length to increase the protection area.

[0027] In this embodiment, a first telescopic support column 3 is provided at the bottom of the second telescopic support column 22, and jacks 7 are hinged on both sides of the bottom of the first protective grid 1. The other end of the jack 7 is hinged to the outer wall of one end of two of the first telescopic support columns 3, and a driving device is provided on the outer wall of one end of one of the fixed blocks 6.

[0028] In this embodiment, the driving device includes a protective cover 16 fixed to one side of the outer wall of one end of the fixed block 6, a motor 18 is installed on one side of the inner wall of the protective cover 16, the output shaft of the motor 18 is connected to a bidirectional screw rod 15, and a second bevel gear 20 is fixed to the outer wall of the bidirectional screw rod 15 on one side close to the motor 18.

[0029] In this embodiment, one end of the first screw rod 9 passes through one end of one of the fixing blocks 6 to fix a first bevel gear 19, and the first bevel gear 19 is meshed with the second bevel gear 20. A protective mechanism is provided on the surfaces of the two fixing blocks 6 that are close to each other.

[0030] In this embodiment, the protective mechanism includes a second guide rod 21 provided on the outer wall of one end of the other fixed block 6, the outer walls of the bidirectional screw rod 15 and the second guide rod 21 are both sleeved with a second slider 14, and the two second sliders 14 are installed with the same telescopic protective net 5 on the side close to each other, and protective net sub-plates 13 are provided on both sides of the inner wall of the telescopic protective net 5. Third sliders 17 are fixed at both ends of the protective net sub-plate 13, and the four third sliders 17 are respectively adapted to the bidirectional screw rod 15 and the second guide rod 21. When the protective net sub-plate 13 is fully unfolded, it can prevent the falling of impurities and hard objects from damaging the bracket.

[0031] In this embodiment, two fixed beams 2 are fixed to the mutually adjacent sides of the four first telescopic support columns 3 , and the two fixed beams 2 correspond to the four first telescopic support columns 3 in pairs.

[0032] In this embodiment, guardrails 4 are provided on both side outer walls of the first protective grid 1 , and one end of the first protective grid 1 is rotatably connected to one end of one of the fixing blocks 6 .

[0033] Working principle: When in use, when a large area needs to be protected, the motor 18 is run, and the motor 18 drives the bidirectional screw 15 to rotate, and the bidirectional screw 15 drives the second bevel gear 20 to rotate, and the second bevel gear 20 drives the first bevel gear 19 to rotate, and the first bevel gear 19 drives the first screw 9 to rotate, and the first screw 9 moves the first slider 10 adapted thereto, and the first slider 10 drives the second protection grid 8 to move, and the second protection grid 8 drives another first slider 10 to slide in the first guide rod 11 When the two-way screw rod 15 rotates, the two-way screw rod 15 will drive the two third sliders 17 adapted thereto to move away from each other. At this time, the third slider 17 will drive the corresponding protection net sub-plates 13 to move away from each other. At this time, the protection net sub-plate 13 will drive the other two third sliders 17 corresponding thereto to move away from each other. When the protection net sub-plate 13 is fully unfolded, it can prevent the falling of impurities and hard objects from damaging the bracket, thereby achieving the effect of protecting the bracket.

[0034] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0035] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0037] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. 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 tunnel excavation support forward protection mechanism, comprising a first protection grid (1), characterized in that: One end of the first protection grid (1) is provided with two symmetrical fixing blocks (6), and a protection mechanism is provided on the mutually adjacent sides of the two fixing blocks (6); a second protection grid (8) is provided at the bottom of the first protection grid (1), and adjustment mechanisms for adjusting the position of the second protection grid (8) are provided at both ends, and a driving device for driving the adjustment mechanism is provided at one end of one of the fixing blocks (6); The adjustment mechanism comprises two symmetrical mounting blocks (12) fixed at the bottom of the first protective grid (1), one end of the mounting block (12) close to the fixed block (6) is rotatably connected to a first screw rod (9), and the other end of the mounting block (12) close to the fixed block (6) is fixed to a first guide rod (11), the outer walls of the first screw rod (9) and the first guide rod (11) are both provided with an adaptive first slider (10), the two first sliders (10) are fixed to the same second protective grid (8) on their mutually close sides, and the two sides of the end of the second protective grid (8) close to the fixed block (6) are respectively fixed to the two first sliders (10) in a one-to-one correspondence, and the bottom of the fixed block (6) is provided with a second telescopic support column (22).

2. The tunnel excavation support forward protection mechanism according to claim 1 is characterized in that: A first telescopic support column (3) is provided at the bottom of the second telescopic support column (22), and jacks (7) are hinged on both sides of the bottom of the first protective grid (1), and the other end of the jack (7) is hinged to the outer wall of one end of two of the first telescopic support columns (3), and a driving device is provided on the outer wall of one end of one of the fixed blocks (6).

3. The tunnel excavation support forward protection mechanism according to claim 2 is characterized in that: The driving device comprises a protective cover (16) fixed to one side of the outer wall of one end of a fixed block (6); a motor (18) is installed on one side of the inner wall of the protective cover (16); an output shaft of the motor (18) is connected to a bidirectional screw rod (15); and a second bevel gear (20) is fixed to the outer wall of the bidirectional screw rod (15) on a side close to the motor (18).

4. The tunnel excavation support forward protection mechanism according to claim 3 is characterized in that: One end of the first screw rod (9) passes through one end of one of the fixed blocks (6) and is fixed with a first bevel gear (19), and the first bevel gear (19) is meshed with the second bevel gear (20), and a protective mechanism is provided on the sides of the two fixed blocks (6) that are close to each other.

5. The tunnel excavation support forward protection mechanism according to claim 4 is characterized in that: The protection mechanism comprises a second guide rod (21) arranged on the outer wall of one end of another fixed block (6); the outer walls of the bidirectional screw rod (15) and the second guide rod (21) are both sleeved with a second slider (14); the two second sliders (14) are installed with the same telescopic protection net (5) on the sides close to each other; the inner walls of the telescopic protection net (5) are provided with protection net sub-plates (13); the two ends of the protection net sub-plates (13) are fixed with third sliders (17), and the four third sliders (17) are respectively adapted to the bidirectional screw rod (15) and the second guide rod (21).

6. The tunnel excavation support forward protection mechanism according to claim 2 is characterized in that: Two fixed beams (2) are fixed to the mutually adjacent sides of the four first telescopic support columns (3), and the two fixed beams (2) correspond to the four first telescopic support columns (3) in pairs.

7. The tunnel excavation support forward protection mechanism according to claim 1 is characterized in that: Guardrails (4) are provided on both side outer walls of the first protective net frame (1), and one end of the first protective net frame (1) is rotatably connected to one end of one of the fixed blocks (6).

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