Mining air door mechanical locking device capable of automatically releasing locking

Abstract

The utility model relates to the technical field of mining equipment, in particular to a mining air door mechanical locking device capable of automatically releasing locking, which comprises a shell, a single-acting cylinder, a pulley block, a steel wire rope, a counter weight, a check block, an air pipe and the like. Mechanical locking is adopted for the mining non-pressure air door and the air door locking device, and a check block of the locking device is controlled by a single-acting air cylinder. When compressed air is injected into the air cylinder, the check blocks can limit simultaneous opening of the air doors on the two sides. When no compressed air is injected into the air cylinder, the check blocks do not work, and the air doors on the two sides can be opened simultaneously.

Description

TECHNICAL FIELD

[0001] The utility model relates to mining equipment technical field, especially a kind of mine air door mechanical locking device that can automatically release locking. BACKGROUND

[0002] Current market mining air door mechanical locking device mostly cannot release locking when circuit failure, air path failure occurs, leading to unable to open two air doors simultaneously, hinder personnel escape, underground traffic and emergency ventilation needs.

[0003] Therefore, the present application designs a kind of mine air door mechanical locking device that can automatically release locking to solve the above problems. SUMMARY

[0004] The utility model provides a kind of mine air door mechanical locking device that can automatically release locking to make up for the deficiency in prior art.

[0005] A kind of mine air door mechanical locking device that can automatically release locking, including the shell installed between two pressureless air doors in roadway wall, it is characterized in that:

[0006] Two counterweights of connecting dynamic pulley are provided on the shell, fixed pulley is provided above the shell, steel wire rope passes through fixed pulley and dynamic pulley, one end of steel wire rope is connected with air door, single-acting cylinder is provided between two fixed pulleys, the push rod end of single-acting cylinder is connected with stop block, and stop block is located between two counterweights.

[0007] Further, in order to better realize the utility model, the single-acting cylinder is fixed to the roadway wall by expansion bolts, and the push rod front end is installed with the stop block that can rotate by 90 degrees.

[0008] Further, in order to better realize the utility model, the single-acting cylinder is connected with mine compressed air source through air pipe.

[0009] Further, in order to better realize the utility model, the steel wire rope is provided with two, and the pulley block formed by fixed pulley and dynamic pulley is connected with two pressureless air doors and counterweight A, counterweight B respectively.

[0010] Further, in order to better realize the utility model, the stop block limits the displacement of one of the counterweights when the single-acting cylinder is inflated, and releases the constraint on the counterweight when the cylinder loses pressure.

[0011] The utility model has the advantages that:

[0012] The utility model is a pure mechanical structure through single-acting cylinder and counterweight linkage, which can automatically unlock double air doors when air path fails, and meets the response requirements of escape passage in Coal Mine Safety Regulations. BRIEF DESCRIPTION OF DRAWINGS

[0013] Fig. 1 This is a schematic diagram of the structure of this utility model when both dampers are closed;

[0014] Fig. 2 This is a schematic diagram of the structure of the right-side damper of this utility model when it is open;

[0015] Fig. 3 This is a schematic diagram of the structure of this utility model when both dampers can be opened in the event of a gas circuit failure.

[0016] In the picture,

[0017] 1. Housing, 2. Movable pulley, 3. Counterweight, 4. Fixed pulley, 5. Single-acting cylinder, 6. Stop block, 7. Wire rope, 8. Air pipe, 9. Compressed air. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] Figs. 1-3 In one specific embodiment of this utility model, the locking device is fixed to the roadway wall between two pressureless air doors with expansion bolts. A stop block is installed at the front end of the single-acting cylinder push rod, so that the stop block can only move up and down with the push rod, but can rotate freely 90 degrees left and right. The air pipe is connected to the compressed air source in the mine to provide power to the single-acting cylinder. The steel wire ropes on both sides are respectively connected to the two pressureless air doors.

[0021] like Fig. 2 As shown, under normal conditions, when the right-side damper is open, the counterweight B, pulled by the wire rope, rises and pushes the stop block to rotate 90 degrees counterclockwise. At this time, due to the single-acting cylinder being inflated, the push rod restricts the stop block from moving up and down and presses down on the top of the counterweight A, preventing the counterweight A from rising. Consequently, the left-side damper is pulled taut by the wire rope and cannot be opened. Only when the right-side damper closes, the counterweight B falls back to the bottom, and the stop block can rotate freely left and right, can the left-side damper be opened. The same logic applies when the left-side damper is opened.

[0022] like Fig. 3As shown, when the downhole gas circuit and the electric circuit fail, the single-acting air cylinder cannot be inflated, the push rod thrust is 0, the counterweight A and the counterweight B can be lifted at the same time, and the air doors on both sides can be opened at the same time, thereby avoiding affecting personnel escape and vehicle passing.

[0023] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting, and other modifications or equivalent replacements of the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A mechanical locking device for mine ventilation doors that can automatically release the lock, comprising a housing (1) installed on the roadway wall between two pressureless ventilation doors, characterized in that: The housing (1) is provided with two counterweights (3) connected to the movable pulley (2). A fixed pulley (4) is provided above the housing (1). A wire rope (7) passes over the fixed pulley (4) and the movable pulley (2). One end of the wire rope (7) is connected to the damper. A single-acting cylinder (5) is provided between the two fixed pulleys (4). A stop block (6) is connected to the end of the push rod of the single-acting cylinder (5). The stop block (6) is located between the two counterweights (3).

2. The mine ventilation door mechanical interlocking device with automatic unlocking capability according to claim 1, characterized in that: The single-acting cylinder (5) is fixed to the roadway wall by expansion bolts, and a stop block (6) that can rotate 90 degrees is installed at the front end of its push rod.

3. The mine ventilation door mechanical interlocking device with automatic unlocking capability according to claim 1, characterized in that: The single-acting cylinder (5) is connected to the mine compressed air source via an air pipe (8).

4. The mine ventilation door mechanical interlocking device with automatic unlocking capability according to claim 1, characterized in that: The steel wire rope is provided in two parts, which are connected to the two pressureless air doors and counterweights A and B respectively by a pulley group consisting of a fixed pulley (4) and a movable pulley (2).

5. The mine ventilation door mechanical interlocking device with automatic unlocking capability according to claim 1, characterized in that: The stop (6) restricts the displacement of one of the counterweights (3) when the single-acting cylinder (5) is inflated, and releases the constraint on the counterweight when the cylinder is depressurized.

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