Mine dirty air isolation air door

Abstract

A mine dirty air isolation air door comprises a door frame and a door body, the door body is hinged to the door frame through a torsion spring, and a fixing device used for blocking the door body and preventing the door body from rebounding is arranged in front of the door body. The fixing device is arranged on the top of the rod sleeve which can drive the fixing device to move downwards when bearing pressure and can drive the fixing device to rebound after the pressure is relieved. The two rod sleeves are arranged in front of the door body in parallel front and back; the fixing device comprises a first fixing device arranged on the front rod sleeve and a second fixing device arranged on the rear rod sleeve; the first fixing device is used for fixing the door body to a first fixing point position at the end of the front rod sleeve, the second fixing device is used for fixing the door body to a second fixing point position at the end of the rear rod sleeve, and the opening degree of the door body when the door body is located at the first fixing point position is larger than that of the door body when the door body is located at the second fixing point position. The problem that a common air door cannot be automatically closed after a transport vehicle passes through is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mine operation, in particular to a non-powered mine dirty air isolation damper. Background Art

[0002] The safety and reliability of air dampers are crucial in coal mining operations. Mine dampers are primarily used to control the size and direction of airflow, ensuring that air circulation within the mine meets safety standards. Some dampers need to be constantly open to ensure the flow of fresh air, while others need to remain closed to isolate contaminated air.

[0003] In some mines, since the dampers that isolate polluted air are often located in key traffic locations, trackless transport vehicles need to open their doors to pass through. If they are not closed in time, it will cause a short circuit in the airflow and affect the ventilation. In the existing technology, electric dampers are usually used to solve this problem. However, due to the extremely high safety requirements of the mine environment, the automatic control device required for the electric dampers is relatively complex. If a circuit failure occurs, the damper may not work properly or even cause an electrical fire. Therefore, explosion-proof devices must be used, which are relatively expensive. In comparison, ordinary dampers are much cheaper, but they need to be manually controlled to close, and usually require people on the vehicle to get off the vehicle to operate, which affects the vehicle's traffic efficiency. In another case, after the damper is opened, it is often not closed in time due to negligence, causing air leakage, affecting the ventilation effect and safety of the mine. Utility Model Content

[0004] The utility model provides a mine polluted air isolation damper, which aims to solve the problem that ordinary dampers cannot be automatically closed after a transport vehicle passes through.

[0005] The technical solution of this utility model is as follows:

[0006] A mine dirty air isolation damper, comprising a door frame and a door body, wherein the door body is hinged to the door frame by a torsion spring, and a fixing device is provided in front of the door body for blocking the door body and preventing it from rebounding; the fixing device is arranged at the top of a rod sleeve which can drive the fixing device to move downward when under pressure, and drive the fixing device to rebound after the pressure is released; there are two rod sleeves which are arranged in parallel front and back in front of the door body; the fixing device comprises a first fixing device provided on the front rod sleeve and a second fixing device provided on the rear rod sleeve; the first fixing device is used to fix the door body at a first fixing point at the front end of the rod sleeve, and the second fixing device is used to fix the door body at a second fixing point at the rear end of the rod sleeve, and the opening of the door body when it is at the first fixing point is greater than the opening when it is at the second fixing point.

[0007] Specifically, the rod sleeve is slidably connected to the upper part of the rod body fixed on the ground; the top of the rod body is provided with a guide groove, and a spring is installed in the guide groove.

[0008] Furthermore, it also includes a limit plate for limiting the upper limit position of the rod sleeve.

[0009] Specifically, the fixing device is a fixing block provided with an inclined surface.

[0010] Furthermore, the first fixing device is a fixing block with a groove on the top, and the bottom surface of the door body is provided with a fixing hole that matches the fixing block.

[0011] Compared with the prior art, the present invention has the following positive effects:

[0012] (1) The utility model adopts a torsion spring to hinge the door body to the door frame. By setting a driving cross bar that can drive the fixing device to move downward when under pressure and can drive the fixing device to rebound after the pressure is released, the damper can automatically close after the transport vehicle passes without the need for a complex control circuit, thereby improving the vehicle traffic efficiency and effectively avoiding the problem of the door body failing to close in time due to negligence.

[0013] (2) The utility model forms a dual-point fixing mechanism for the door body by setting two driving cross bars arranged in front and behind the door body, ensuring that the air door can be automatically closed after the rear wheel of the vehicle passes.

[0014] (3) The driving cross bar of the present invention is fixed to the ground through a rod body, and a rod sleeve is provided on the rod body, which can effectively prevent dust from entering the gap between the rod body and the rod sleeve, thereby avoiding the problem of rebound failure and significantly improving the reliability of the device.

[0015] (4) The present invention provides a guide groove at the top of the rod body to ensure that the elastic component can smoothly extend and retract up and down without tilting, thereby further enhancing the stability and reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a mine dirty air isolation damper of the utility model;

[0017] Figure 2 This is a schematic structural diagram of the cooperation between the fixing hole and the second fixing device in an embodiment of the present utility model;

[0018] Figure 3 This is a schematic diagram of the top view of the door body and the fixing block in the embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the driving cross bar in an embodiment of the present utility model;

[0020] Figure 5 This is a schematic structural diagram of the cooperation between the fixing hole and the first fixing device in an embodiment of the present utility model;

[0021] Figure 6 This is a schematic diagram of the limiting plate structure in an embodiment of the present utility model.

[0022] Explanation of the accompanying drawings: 110, door frame; 120, door body; 121, fixing hole; 200, driving cross bar; 210, first fixing device; 211, second fixing device; 220, rod sleeve; 230, rod body; 231, guide groove; 240, spring; 250, limit plate. DETAILED DESCRIPTION

[0023] The technical solutions and technical effects of the present invention are described in detail below with reference to the accompanying drawings. Obviously, the embodiments described are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] like Figure 1 、 Figure 2 and Figure 3 A mine dirty air isolation damper includes a door frame 110 and a door body 120 hingedly connected by a torsion spring, and a fixing device disposed in front of the damper to block the door body 120 from rebounding. The fixing device is disposed on the top of a driving crossbar 200 that can drive the fixing device downward when under pressure and drive the fixing device to rebound when the pressure is released.

[0025] like Figure 4 The driving cross bar 200 includes a rod body 230 fixed to the ground and a rod sleeve 220 vertically slidably connected to the outside of the top of the rod body 230. The fixing device is arranged on the top surface of the rod sleeve 220. A guide groove 231 for accommodating an elastic component is provided at a position corresponding to the fixing device on the rod body 230, and the guide groove 231 can limit the extension and contraction direction of the elastic component. The rod sleeve 220 can move downward along the rod body 230 after being subjected to pressure. After the pressure is released, the rod sleeve 220 returns to its initial position under the action of the elastic component. The rod sleeve 220 can prevent dust from entering the gap between the rod body 230 and the rod sleeve 220 to cause rebound failure, thereby further improving the stability and reliability of the device.

[0026] like Figure 1 As a preferred embodiment of the present invention, there are two driving cross bars 200, which are arranged in parallel in front of the damper. Figure 4 and Figure 5, the fixing device is arranged on the top surface of the rod sleeve 220. The fixing device includes a first fixing device 210 arranged on the front driving cross bar 200 and a second fixing device 211 arranged on the rear driving cross bar 200. The first fixing device 210 is used to fix the door body 120 at a first fixed point at the end of the driving cross bar 200, and the second fixing device 211 is used to fix the door body 120 at a second fixed point at the end of the driving cross bar 200. The opening of the door body 120 when it is at the first fixed point is greater than the opening when it is at the second fixed point. Through the dual-point fixing mechanism, the damper can be controlled to automatically close after the rear wheels of the transport vehicle pass by without hindering the passage of the transport vehicle.

[0027] As a preferred example of the present invention, Figure 5 , the first fixing device 210 is a fixing block with a groove on the top. Figure 3 The second fixing device 211 is a fixing block. The top of the fixing block is inclined, with the side facing the opening direction of the door body 120. The bottom surface of the door body 120 is provided with a fixing hole 121 for cooperating with the first fixing device 210 to limit the maximum opening angle of the damper, preventing the damper from hitting the wall and being damaged due to excessive opening angle.

[0028] When the door body 120 is pushed to open, the door body 120 contacts the second fixing device 211, which pushes the inclined surface to drive the rod sleeve 220 downward. When the door body 120 passes the fixing block and reaches the outside of the fixing block, the force applied by the door body 120 on the fixing block disappears. Under the action of the elastic component, the rod sleeve 220 drives the fixing block to return to its original position. The upright side of the fixing block blocks the door body 120, thus completing the fixation of the door body 120. Continuing to push the door body 120, the door body 120 contacts the first fixing device 210, which pushes the inclined surface to drive the rod sleeve 220 downward. When the outer protrusion of the fixing hole 121 enters the groove at the top of the first fixing device 210, the right side wall of the fixing hole 121 no longer contacts the inclined surface of the first fixing device 210, thus completing the fixation of the door body 120.

[0029] like Figure 5 and Figure 6 As a preferred embodiment of the present invention, the outer sides of the fixing devices at both ends of the driving crossbar 200 are provided with limit plates 250 for limiting the upper limit of the rod sleeve 220. The limit plates 250 include a horizontal plate arranged at the top of the upward movement path of the rod sleeve 220, and the horizontal plate is fixed to the ground on both sides of the rod body 230 through the front and rear connecting plates.

[0030] As a preferred example of the present invention, the elastic component connecting the rod sleeve 220 and the rod body 230 is a spring 240 .

[0031] During use, a staff member first manually opens the damper and pushes the door body 120 to secure it to the first fixed point. When the vehicle travels from rear to front, the front wheels first pass over the rear drive crossbar 200 and then over the front drive crossbar 200. At this point, only the first fixing device 210 on the rod sleeve 220 of the front drive crossbar 200 is active; the second fixing device 211 on the rod sleeve 220 of the rear drive crossbar 200 is inactive. When the front wheels pass over the front drive crossbar 200, the rod sleeve 220 of the front drive crossbar 200 drives the first fixing device 210 to release its grip on the door body 120. Under the action of the torsion spring, the door body 120 gradually rotates until it contacts the inner second fixing device 211 and is secured to the second fixed point. Next, the rear wheels of the transport vehicle pass over the rear drive crossbar 200, releasing the second fixing device 211 from securing the door body 120. The damper gradually closes under the action of the torsion spring without hindering the passage of transport vehicles.

[0032] When the vehicle travels from front to back, the front wheels of the transport vehicle first pass over the front drive crossbar 200 and then over the rear drive crossbar 200. At this point, the second fixing device 211 on the rod sleeve 220 of the rear drive crossbar 200 is inoperative. The front wheels of the transport vehicle press over the front drive crossbar 200, releasing the first fixing device 210 from securing the door body 120. The door body 120 gradually rotates to the second fixing point under the action of the torsion spring. At this point, the first fixing device 210 is inoperative. After the rear wheels of the transport vehicle press over the rear drive crossbar 200, the second fixing device 211 releases its grip on the door body 120. The door body 120 gradually closes under the action of the torsion spring without hindering the passage of the transport vehicle.

[0033] It should be noted that it is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. The scope of the present invention is defined by the claims rather than the above description.

Claims

1. A mine dirty air isolation damper, comprising a door frame (110) and a door body (120), wherein the door body (120) is hinged to the door frame (110) via a torsion spring, and is characterized in that: A fixing device for blocking the door body (120) and preventing it from rebounding is provided in front of the door body (120); the fixing device is arranged on the top of a rod sleeve (220) that can drive the fixing device to move downward when under pressure and can drive the fixing device to rebound after the pressure is released; the rod sleeves (220) are two and are arranged in parallel in front of the door body (120); the fixing device includes a first fixing device (210) arranged on the front rod sleeve (220) and a second fixing device (211) arranged on the rear rod sleeve (220); the first fixing device (210) is used to fix the door body (120) at a first fixing point at the end of the rod sleeve (220) at the front, and the second fixing device (211) is used to fix the door body (120) at a second fixing point at the end of the rod sleeve (220) at the rear, and the opening degree of the door body (120) when it is at the first fixing point is greater than the opening degree when it is at the second fixing point.

2. The mine dirty air isolation damper according to claim 1, characterized in that: The rod sleeve (220) is slidably connected to the upper part of a rod body (230) fixed on the ground; a guide groove (231) is provided on the top of the rod body (230), and a spring (240) is installed in the guide groove (231).

3. The mine dirty air isolation damper according to claim 2, characterized in that: It also includes a limiting plate (250) for limiting the upward movement of the rod sleeve (220).

4. The mine dirty air isolation damper according to claim 1, characterized in that: The fixing device is a fixing block provided with an inclined surface.

5. The mine dirty air isolation damper according to claim 1, characterized in that: The first fixing device (210) is a fixing block with a groove on the top, and the bottom surface of the door body (120) is provided with a fixing hole (121) that matches the fixing block.

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