Unbalanced clamp-type locking device for coal mine air doors

Abstract

The present invention relates to an unbalanced clamp-type locking device for a coal mine air door. To fill the gap in the prior art, the unbalanced clamp-type locking device for a coal mine air door comprises an A air door, a B air door and an air door locking device, the locking device comprises a clamp-shaped circular ring and two counterweight guide rods, the clamp-shaped circular ring comprises a pair of clamp pressure rings, the clamp pressure ring comprises two semicircular rings, the two semicircular rings are connected by a connecting steel plate, the semicircular rings are opposite to each other, forming two pairs of circular rings, and the two counterweight guide rods are respectively arranged directly below the two pairs of circular rings. When one of the air doors is opened, the counterweight guide rod connected thereto moves upward, squeezes into the corresponding circular ring, and opens the pair of circular rings. The two clamp pressures rotate around the hinge shaft, and the other pair of circular rings are brought together, which can prevent the other counterweight guide rod from moving upward and prevent the other air door from opening. The present invention can effectively avoid the airflow short circuit caused by the simultaneous opening of two air doors, and is widely applicable to mine tunnels.

Description

Technical Field

[0001] The invention relates to an unbalanced clamp type locking device for a coal mine air door. Background Art

[0002] In coal mining operations, the normal operation of the ventilation system is crucial. First, a normal ventilation system and stable wind flow can ensure the oxygen needed for normal breathing of underground personnel; second, a normal ventilation system can discharge harmful gases produced underground to ensure production; finally, a normal ventilation system can adjust the climatic conditions underground and create a good working environment. Since coal mines have undergone years of mining and construction, many tunnels and work places that require wind are arranged underground. In the daily safety management of mines, in order to maintain the stability of the ventilation system, it is necessary to build a variety of ventilation facilities, such as closed walls, board-tight walls, dampers, and adjustable wind windows, to ensure that the underground ventilation system is reliable and effective. Among them, the role of mine dampers is to ensure safe production in mines, ensure the stability of the ventilation system, and reduce ineffective air leakage. The wind flow in the partition tunnel is opened by manpower, and it is closed automatically by relying on spring tension and wind flow pressure difference. It is often set in pedestrian tunnels or tunnels with less traffic. If two dampers are opened at the same time, it will cause an air short circuit and damage the ventilation system, causing the airflow that should have followed the prescribed route to not follow the original route. This will cause no wind or light wind in some areas underground, causing gas to exceed the limit or accumulate, which may lead to accidents.

[0003] The path of wind flow underground is scattered. The wind flow is calculated according to the actual situation, and its flow direction and air volume are changed. The adjustment method is to block or adjust the wind flow by building temporary or permanent ventilation facilities. The site selection for underground air gate construction is mostly selected in a position where the tunnel wall is relatively straight, the curvature is relatively small, and the distance between the two air gates is appropriate. Therefore, the coal mine air gates are mostly connected by air gate ropes to achieve the interlocking requirements between the two air gates. In daily use and operation, the air gates are opened at a small angle at the same time due to the air flow pressure difference and the workers' misoperation, causing the air flow route to change, the ventilation system to be disordered, and potential hidden dangers to the safe production of coal mines, making it necessary to solve the problem of air gate locking.

[0004] Most of the existing damper interlocking devices use complex electrical mechanisms and must use mining intrinsically safe electrical appliances, which are complex in structure, high in cost and unsafe. Summary of the invention

[0005] The technical problem to be solved by the present invention is how to fill the above-mentioned gap in the prior art and provide an unbalanced clamp-type locking device for a coal mine air door with a purely mechanical structure.

[0006] In order to solve the above technical problems, the unbalanced clamp-type locking device of the coal mine air door includes an A air door, a B air door and an air door locking device, and is characterized in that: the air door locking device is a purely mechanical structure, which includes two intermediate fixed pulleys, two side fixed pulleys, two air door ropes and a locking device, the locking device includes a clamp-shaped circular ring and two counterweight guide rods, the clamp-shaped circular ring includes a pair of clamp pressure rings, the clamp pressure ring includes two semicircular rings, the two semicircular rings are connected by a connecting steel plate, the inner sides of the two connecting steel plates of the pair of clamp pressure rings are respectively fixed with articulated tubes, the axes of the articulated tubes on the inner sides of the two connecting steel plates coincide, are staggered with each other, and are hinged together through the same hinge shaft, the semicircular rings at both ends of the two connecting steel plates are opposite to each other, forming two pairs of circular rings, and the locking device is fixed to the counterweight through a connecting steel plate. The two side fixed pulleys are respectively fixed on the side walls of the supporting tunnel, and the two counterweight guide rods are cylindrical with conical tops. One end of the two damper ropes is respectively fixed on the top of the two counterweight guide rods, and the other end is respectively tied to the damper A and the damper B after crossing the middle fixed pulley and the corresponding side fixed pulley. The two counterweight guide rods are respectively arranged directly below the two pairs of circular rings. When one of the dampers is opened, the counterweight guide rod connected to it moves upward and squeezes into the corresponding pair of circular rings to open the pair of circular rings. The two clamps rotate around the hinge shaft, and the other pair of circular rings are closed together, which can prevent the other counterweight guide rod from moving upward and prevent the other damper from opening. A limit pin is provided at the lower end of each counterweight guide rod.

[0007] With this design, when the door on one side is opened, the locking device is driven by the damper rope to instantly lock the other end, making the other damper locked and unable to be opened; when this door is closed, the damper rope is automatically reset under the action of the counterweight guide rod, and the limit pin can effectively prevent the counterweight guide rod from falling out.

[0008] As an optimization, a sliding sleeve rod is connected in series to the corresponding position of the damper rope connected to the B damper, and a through hole is opened on the matching narrow wall or door frame for installing the B damper, and a sliding sleeve tube is arranged in the through hole, and the sliding sleeve rod is inserted in the sliding sleeve tube and can move in the sliding sleeve tube under the drive of the damper rope. The contact surface between the sliding sleeve rod and the sliding sleeve tube is preferably a smooth metal surface with airtight sealing. Such a design has good airtight effect and long service life.

[0009] The unbalanced clamp-type locking device for coal mine air doors of the present invention effectively avoids the safety hazard of airflow short circuit caused by the simultaneous opening of two air doors, ensures the stability of the underground ventilation system of the coal mine, and effectively improves the disaster prevention and resistance capabilities of the mine; at the same time, since the device is a purely mechanical structure, it does not require electricity, is safe and energy-saving, and is widely applicable to underground tunnels of various coal mines. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The unbalanced clamp type locking device for coal mine air door of the present invention is further described below in conjunction with the accompanying drawings:

[0011] Figure 1 It is a structural schematic diagram of the first embodiment of the unbalanced clamp-type locking device for the air door of a coal mine;

[0012] Figure 2 It is a top view of the first embodiment of the unbalanced clamp-type locking device for the air door of a coal mine;

[0013] Figure 3 This is a schematic diagram of the locking device structure of the unbalanced clamp-type locking device for the air door of a coal mine;

[0014] Figure 4 It is a top view of the locking device of the unbalanced clamp-type locking device of the coal mine air door.

[0015] In the figure: 1 is air door A, 2 is air door B, 3 is middle fixed pulley, 4 is side fixed pulley, 5 is air door rope, 6 is counterweight guide rod, 7 is clamp pressure ring, 71 is semicircular ring, 72 is connecting steel plate, 73 is articulated tube, 8 is articulated shaft, 9 is tunnel side wall, 10 is limit pin, 11 is sliding sleeve rod, and 12 is sliding sleeve tube. DETAILED DESCRIPTION

[0016] Implementation method 1: Figure 1As shown, the unbalanced clamp-type locking device of the coal mine air door comprises an A air door 1, a B air door 2 and an air door locking device, the air door locking device is a purely mechanical structure, which comprises two intermediate fixed pulleys 3, two side fixed pulleys 4, two air door ropes 5 and a locking device, the locking device comprises a clamp-shaped circular ring and two counterweight guide rods 6, the clamp-shaped circular ring comprises a pair of clamp pressure rings 7, the clamp pressure ring 7 comprises two semicircular rings 71, the two semicircular rings 71 are connected by a connecting steel plate 72, the inner sides of the two connecting steel plates 72 of the pair of clamp pressure rings 7 are respectively fixed with hinged tubes 73, the axes of the hinged tubes 73 on the inner sides of the two connecting steel plates 72 coincide, are interlaced with each other, and are hinged together through the same hinge shaft 8, the semicircular rings 71 at both ends of the two connecting steel plates 72 are opposite to each other to form two pairs of circular rings, and the locking device is fixed to the matching lane through a connecting steel plate 72 The two side fixed pulleys 4 are respectively fixed on the side walls 9 of the supporting tunnel adjacent to the A damper 1 and the B damper 2. The two counterweight guide rods 6 are cylindrical with a conical top. One end of the two damper ropes 5 are respectively fixed on the top of the two counterweight guide rods 6, and the other ends are respectively tied to the A damper 1 and the B damper 2 after crossing the middle fixed pulley 3 and the corresponding side fixed pulley 4. The two counterweight guide rods 6 are respectively arranged directly below the two pairs of circular rings. When one of the dampers is opened, the counterweight guide rod 6 connected to it moves upward and squeezes into the corresponding pair of circular rings to open the pair of circular rings. The two clamping rings 7 rotate around the hinge shaft 8, and the other pair of circular rings are closed together, which can prevent the other counterweight guide rod 6 from moving upward and prevent the other damper from opening. A limit pin 10 is provided at the lower end of each counterweight guide rod 6.

[0017] A sliding sleeve rod 11 is connected in series at the corresponding position of the damper rope connected to the B damper. A through hole is opened on the matching narrow wall or door frame for installing the B damper 2. A sliding sleeve tube 12 is arranged in the through hole. The sliding sleeve rod 11 is inserted into the sliding sleeve tube 12 and can move in the sliding sleeve tube 12 driven by the damper rope 5.

Claims

1. An unbalanced clamp-type locking device for a coal mine air door, comprising an A air door, a B air door and an air door locking device, characterized in that: The damper locking device is a purely mechanical structure, which includes two intermediate fixed pulleys, two side fixed pulleys, two damper ropes and a locking device. The locking device includes a clamp-shaped circular ring and two counterweight guide rods. The clamp-shaped circular ring includes a pair of clamp pressure rings, and the clamp pressure ring includes two semicircular rings. The two semicircular rings are connected by a connecting steel plate. The inner sides of the two connecting steel plates of the pair of clamp pressure rings are respectively fixed with articulated tubes. The axes of the articulated tubes on the inner sides of the two connecting steel plates coincide, are staggered with each other, and are hinged together through the same hinge axis. The semicircular rings at both ends of the two connecting steel plates are opposite to each other to form two pairs of circular rings. The locking device is fixed to the side wall of the matching lane through a connecting steel plate, and the two intermediate fixed pulleys are fixed above the locking device. The two side fixed pulleys are respectively fixed on the side walls of the supporting tunnel adjacent to the A air door and the B air door. The two counterweight guide rods are cylindrical with a conical top. One end of the two air door ropes is respectively fixed on the top of the two counterweight guide rods, and the other end is respectively tied to the A air door and the B air door after crossing the middle fixed pulley and the corresponding side fixed pulley. The two counterweight guide rods are respectively arranged directly below the two pairs of circular rings. When one of the air doors is opened, the counterweight guide rod connected to it moves upward and squeezes into the corresponding pair of circular rings to open the pair of circular rings. The two clamps rotate around the hinge shaft, and the other pair of circular rings are closed together, which can prevent the other counterweight guide rod from moving upward and prevent the other air door from opening. A limit pin is provided at the lower end of each counterweight guide rod.

2. The unbalanced clamp type locking device for coal mine air door according to claim 1 is characterized in that: A sliding sleeve rod is serially connected to the corresponding position of the damper rope connected to the B damper. A through hole is opened on the matching narrow wall or door frame for installing the B damper. A sliding sleeve tube is arranged in the through hole. The sliding sleeve rod is inserted into the sliding sleeve tube and can move in the sliding sleeve tube under the drive of the damper rope.

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