Anti-reflux device for air door

Abstract

The utility model belongs to the technical field of coal mine tunnel ventilation, and particularly relates to an air door anti-backflow device. Comprising a door-shaped support, a blocking skin and a blocking rod. The door-shaped support can stretch across the rubber belt conveyor to be fixed above the rubber belt conveyor. The top edge of the blocking skin is connected with a cross beam of the door-shaped support, and the blocking skin seals a hole of the door-shaped support on one side. The blocking leather is divided into an upper section and a lower section, the lower half blocking leather is divided into a plurality of strips in the width direction, the blocking rod is connected to the lower end of the upper half blocking leather, and the two ends of the blocking rod are blocked on the door-shaped support. According to the air door anti-backflow device, a linkage structure of the gravity self-resetting stop lever and the sectional type stop leather is adopted, the strip can be lifted in a self-adaptive mode when coal flow passes through, and the stop lever is automatically closed through gravity after the coal flow stops; the stop lever is in limiting lap joint with the door-shaped bracket, so that the stop leather is effectively prevented from being opened in the reverse coal discharging direction, and a reverse airflow channel is blocked; the structure is simple, reliability is high, and working efficiency is high; various consequences caused by air leakage of the air door can be effectively prevented.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine roadway ventilation technology, specifically relating to a backflow prevention device for air doors. Background Technology

[0002] In the process of coal mining, ventilation facilities are built to regulate airflow and direction. At the same time, in order to meet the needs of coal production, belt conveyor penetration holes need to be left in the ventilation facilities. If the penetration holes are not sealed properly, airflow turbulence will occur, resulting in a variety of adverse consequences such as reduced air volume, accumulation of harmful gases, and increased complexity of the ventilation system. To prevent airflow turbulence, backflow prevention devices need to be installed. Utility Model Content

[0003] This invention aims to solve the problem of turbulent airflow caused by inadequate sealing of the wall penetration opening when a through-wall belt conveyor is installed in a coal mine ventilation system.

[0004] This utility model provides the following technical solution: a damper anti-backflow device, including a gate-shaped bracket, a baffle, and a baffle bar; the gate-shaped bracket can span across the belt conveyor and be fixed above the belt conveyor; the top edge of the baffle is connected to the crossbeam of the gate-shaped bracket, and the baffle closes the opening of the gate-shaped bracket on one side; the baffle is divided into upper and lower sections, the lower half of the baffle is divided into several strips along the width direction, and the baffle bar is connected to the lower end of the upper half of the baffle, with both ends of the baffle bar stopping at the gate-shaped bracket.

[0005] Furthermore, each strip is connected to the stop bar by a pull rope.

[0006] Furthermore, the baffle is connected to the crossbeam of the portal frame by bolts.

[0007] Furthermore, the stop bar is connected to the stop skin by bolts.

[0008] Furthermore, the gantry bracket is fixed to the idler frame of the belt conveyor by the clamp at the bottom of the column. The clamp has a through-hole opening that opens downwards. The clamp is tightened by bolts to clamp and fix it to the frame.

[0009] Compared with the prior art, the advantages of this utility model are:

[0010] This utility model provides an anti-backflow device for an air door, which adopts a gravity self-resetting baffle and a segmented baffle linkage structure. When the coal flow passes through, the strip can adaptively rise, and after the coal flow stops, the baffle automatically closes by gravity. The limiting overlap between the baffle and the gate-type bracket effectively prevents the baffle from opening in the opposite direction of coal discharge, blocking the reverse airflow channel. The structure is simple, reliable, and efficient. It can effectively prevent various consequences caused by air leakage from the air door. Attached Figure Description

[0011] Figure 1A schematic diagram of a backflow prevention device for dampers;

[0012] Figure 2 for Figure 1 Side view.

[0013] In the diagram: 1-Gate-shaped bracket; 2-Blocking skin; 2.1-Strip; 3-Blocking bar; 4-Pull rope; 5-Clamping seat. Detailed Implementation

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] like Figure 1 , Figure 2 As shown: A backflow prevention device for an airlock includes a gantry bracket 1, a baffle 2, and a baffle bar 3. The gantry bracket 1 is fixed above the belt conveyor, spanning across it. The top edge of the baffle 2 is connected to the crossbeam of the gantry bracket 1, and the baffle 2 closes the opening of the gantry bracket 1 on one side. The baffle 2 is divided into upper and lower sections. The lower section is divided into several strips 2.1 along its width. The strips 2.1 are raised adaptively according to the height of the coal pile on the belt conveyor. The baffle bar 3 is connected to the lower end of the upper section. Both ends of the baffle bar 3 stop at the gantry bracket 1 to prevent the baffle 2 from opening in the reverse direction.

[0016] When the coal and gangue are transported out by the belt conveyor, the baffle 2 is pushed open to allow coal to be discharged. After the coal is discharged, the baffle 2 falls back due to the gravity of the baffle rod 3. At the same time, there is an overlap between the baffle rod 3 and the gantry support 1 to prevent the baffle 2 from falling back to the opposite direction of coal discharge and causing airflow turbulence.

[0017] Each strip 2.1 is connected to the stop bar 3 by a pull rope 4. The pull rope 4 pulls the strip 2.1 on the side in the direction of lifting, so that the strip 2.1 cannot be lifted in the opposite direction.

[0018] The retaining plate 2 is connected to the crossbeam of the portal frame 1 by bolts. The retaining rod 3 is connected to the retaining plate 2 by bolts; the retaining plate 2 can be replaced separately after it wears out.

[0019] The portal frame 1 is fixed to the idler frame of the belt conveyor by the clamp 5 at the bottom of the column. The clamp 5 has a through-hole that opens downwards. The clamp 5 is tightened by bolts to clamp and fix it to the frame.

[0020] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A backflow prevention device for a damper, characterized in that: It includes a portal frame (1), a baffle (2) and a baffle (3); the portal frame (1) can span the belt conveyor and be fixed above the belt conveyor; the top edge of the baffle (2) is connected to the crossbeam of the portal frame (1), and the baffle (2) closes the opening of the portal frame (1) on one side; the baffle (2) is divided into upper and lower sections, the lower half of the baffle is divided into several strips (2.1) along the width direction, and the baffle (3) is connected to the lower end of the upper half of the baffle, and the two ends of the baffle (3) stop at the portal frame (1).

2. The backflow prevention device for a damper according to claim 1, characterized in that: Each of the strips (2.1) is connected to the stop bar (3) by a pull rope (4).

3. The backflow prevention device for a damper according to claim 1, characterized in that: The baffle (2) is connected to the crossbeam of the portal frame (1) by bolts.

4. The backflow prevention device for a damper according to claim 1, characterized in that: The stop bar (3) is connected to the stop skin (2) by bolts.

5. A damper anti-backflow device according to any one of claims 1 to 4, characterized in that: The portal frame (1) is fixed to the roller frame of the belt conveyor by the clamp (5) at the bottom of the column. The clamp (5) has a through-hole that opens downwards. The clamp (5) is tightened by bolts to clamp and fix it to the frame.

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