Side-pressure-resistant non-pressure air door

Abstract

The utility model discloses a side-pressure-resistant non-pressure air door which is perpendicular to the extending direction of a roadway and is installed between two surrounding rocks in the roadway, and the sides, close to a roadway opening, of the two surrounding rocks are air door installation faces. A plurality of sets of embedded parts are arranged in rock bodies of the surrounding rocks on the two sides, each set of embedded parts is fixedly connected with a horizontally-arranged round pipe, and each round pipe is located on the outer side of the air door installation face. The left side and the right side of a door frame of the non-pressure air door are fixedly connected with a plurality of pieces of round steel, and each piece of round steel is horizontally arranged. The round steels are coaxially mounted in the round pipe in a one-to-one correspondence manner; the inner side surface of the non-pressure air door is tightly attached to the air door mounting surface; when the non-pressure air door is extruded by the stress of surrounding rock, all the round pipes move in the direction close to the door frame along with a surrounding rock body, and the round pipes and the round steel are kept coaxial all the time. The problems that when an existing fixed non-pressure air door is affected by surrounding rock stress, the non-pressure air door is extruded and deformed, and consequently the non-pressure air door is not tightly closed, and air leaks are solved.

Description

[Technical field]

[0001] The utility model belongs to the technical field of non-pressure air doors for mines, and in particular relates to a side pressure resistant non-pressure air door. [Background technology]

[0002] With the extension of mining activities, the stress of the surrounding rock of the tunnel is also increasing. The existing unpressurized air door is installed in the middle of the surrounding rock on both sides and is fixedly connected to the rock mass. When it is affected by the stress of the surrounding rock, the door frame will be squeezed frequently, causing the two doors to deform, misalign, and not close tightly, resulting in serious air leakage of the unpressurized air door, requiring frequent maintenance, which is time-consuming and labor-intensive, and the ventilation system is difficult to manage. [Contents of the utility model]

[0003] The utility model aims to provide a lateral pressure resistant non-pressure damper to solve the problem that the existing fixed non-pressure damper will be squeezed and deformed when affected by the surrounding rock stress, resulting in the non-pressure damper not closing tightly and leaking air.

[0004] The utility model adopts the following technical scheme: a lateral pressure-resistant non-pressure air door, which is perpendicular to the extension direction of the tunnel and installed between two surrounding rocks in the tunnel, and the side of the two surrounding rocks close to the tunnel entrance is the air door installation surface;

[0005] Multiple groups of embedded parts are arranged in the rock bodies of the surrounding rocks on both sides, and each group of embedded parts is fixedly connected with a horizontally arranged round tube, and each round tube is located outside the damper installation surface;

[0006] The left and right sides of the door frame of the pressure-free damper are fixedly connected with multiple round steels, each of which is horizontally arranged; each round steel is coaxially installed in the round tube in a one-to-one correspondence, and the inner side surface of the pressure-free damper is closely fitted with the damper installation surface;

[0007] Among them, when the pressure-free air door is squeezed by the stress of the surrounding rock, each circular tube moves toward the door frame following the surrounding rock mass and always maintains a coaxial relationship with the round steel.

[0008] Furthermore, the distance between the round tube and the adjacent door frame is L1=15 cm, the length of the round tube is L2=5 cm, and the length of the round steel is L3≥20 cm.

[0009] Furthermore, each embedded part is two symmetrically arranged L-shaped steel bars embedded in the surrounding rock mass.

[0010] Furthermore, three round steels are respectively arranged on the door frames on both sides of the pressure-free damper.

[0011] The beneficial effects of the utility model are as follows: round steel is arranged in the door frame, round tubes are pre-buried in the surrounding rock mass, and the pressure-free damper is fixed by coaxial installation of the round steel and the round tube, thereby replacing the fixed connection method of the original pressure-free damper door frame. Since the round tube and the surrounding rock mass can be regarded as a whole, the influence of the surrounding rock stress can be effectively reduced through this coaxial installation method, so that the damper can be used normally even when affected by the surrounding rock stress, and there will be no air leakage caused by poor closure. The maintenance is simple and convenient, which extends the service life of the damper and ensures the reliable operation of the ventilation system.

Brief Description of the Drawings

[0012] Figure 1 This is a structural schematic diagram of a lateral pressure-resistant non-pressure damper of the utility model;

[0013] Figure 2 for Figure 1 Bottom view of

[0014] Among them, 1. embedded parts, 2. round tubes, 3. round steel, 4. non-pressure damper, 5. door frame, 6. surrounding rock, 7. damper installation surface. [Specific implementation method]

[0015] The utility model is described in detail below with reference to the accompanying drawings and specific implementation modes.

[0016] The utility model provides a side pressure resistant non-pressure damper, such as Figure 1 and Figure 2 As shown, a pressure-free damper 4 is installed between two surrounding rocks 6 in the tunnel in a direction perpendicular to the extension of the tunnel, and one side of the two surrounding rocks 6 close to the tunnel opening is a damper installation surface 7.

[0017] A plurality of groups of embedded parts 1 are arranged from top to bottom in the rock bodies of the surrounding rocks 6 on both sides, and each group of embedded parts 1 is fixedly connected to a horizontally arranged round tube 2, and each round tube 2 is installed on the outer side of the damper installation surface.

[0018] The left and right sides of the door frame 5 of the pressure-free damper 4 are fixedly connected with a plurality of round steels 3, which are arranged horizontally from top to bottom. The process of installing the pressure-free damper is to coaxially install each of the round steels 3 in each of the round tubes 2 one by one. After the installation is completed, it is necessary to ensure that the inner side surface of the pressure-free damper 4 is tightly fitted with the damper installation surface to prevent air leakage.

[0019] Among them, when the pressure-free damper 4 is squeezed by the inward stress of the surrounding rocks 6 on both sides, each of the circular tubes 2 moves toward the door frame 5 following the surrounding rock mass. During this process, the round steel 3 is always located in the circular tube 2, and the two maintain a coaxial relationship, which can ensure the normal use of the pressure-free damper.

[0020] In some embodiments, the distance between one end of the round tube 2 close to the door frame and the outer edge of the adjacent door frame 5 is L1=15 cm, the length of the round tube 2 is L2=5 cm, and the length of the round steel is L3≥20 cm. L1 is the movable distance margin of the round tube 2. The length setting requirement of the round steel is to ensure that the round steel does not separate from the round tube during the movement of the round tube 2.

[0021] In some embodiments, each of the embedded parts 1 is two symmetrically arranged L-shaped steel bars embedded in the surrounding rock 5.

[0022] In some embodiments, three round steels 3 are respectively arranged on the door frames 5 on both sides of the non-pressure damper 4 .

[0023] In actual use, the original damper needs to use construction materials of about 1,200 yuan and 5 workers for each maintenance, and needs to be repaired twice a month on average; the improved damper now does not need construction materials for maintenance and requires 2 workers. The utility model sets round steel in the door frame, embeds round tubes in the surrounding rock mass, and fixes the pressure-free damper by coaxial installation of the round steel and the round tube, replacing the original fixed connection method of the pressure-free damper door frame. Since the round tube and the surrounding rock mass can be regarded as a whole, the coaxial installation method can effectively reduce the influence of the surrounding rock stress, so that the damper can be used normally when affected by the surrounding rock stress, and there will be no leakage caused by loose closure. The maintenance is simple and convenient, which prolongs the service life of the damper and ensures the reliable operation of the ventilation system. It solves the problem that the existing fixed pressure-free damper will be squeezed and deformed when affected by the surrounding rock stress, resulting in air leakage caused by loose closure of the pressure-free damper.

Claims

1. A non-pressure damper for resisting lateral pressure, characterized in that: A non-pressure damper (4) is installed between two surrounding rocks (6) in the tunnel in a direction perpendicular to the tunnel extension, and the side of the two surrounding rocks (6) close to the tunnel opening is a damper installation surface; A plurality of groups of embedded parts (1) are arranged in the rock bodies of the surrounding rocks (6) on both sides, each group of embedded parts (1) is fixedly connected to a horizontally arranged circular tube (2), and each circular tube (2) is located outside the damper installation surface; A plurality of round steels (3) are fixedly connected to the left and right sides of the door frame (5) of the pressure-free damper (4), and each round steel (3) is arranged horizontally; each of the round steels (3) is coaxially installed in the circular tube (2) in a one-to-one correspondence, and the inner side surface of the pressure-free damper (4) is tightly fitted with the damper installation surface; When the pressure-free damper (4) is squeezed by the stress of the surrounding rock (6), each of the circular tubes (2) moves along with the surrounding rock mass toward the door frame (5) and always maintains a coaxial relationship with the circular steel (3).

2. The lateral pressure-resistant non-pressure damper according to claim 1, characterized in that: The distance between the circular tube (2) and the adjacent door frame (5) is L1=15 cm, the length of the circular tube (2) is L2=5 cm, and the length of the round steel is L3≥20 cm.

3. A lateral pressure-resistant non-pressure damper as claimed in claim 1 or 2, characterized in that: Each of the embedded parts (1) is two symmetrically arranged L-shaped steel bars embedded in the rock mass of the surrounding rock (6).

4. The lateral pressure-resistant non-pressure damper according to claim 1 or 2, characterized in that: Three round steels (3) are respectively arranged on the door frames (5) on both sides of the pressure-free damper (4).

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