Mine air door with intermediate pressure

Abstract

The utility model discloses an interval pressure type mine air door, including door frame, with the door frame hinged left door and right door and the door latch of spacing left, right door, left door and right door lower part are equipped with the wind door curtain and the short rod of receiving, and the short rod of receiving is fixedly connected with the door board, and the wind door curtain is composed of curtain frame and door curtain, and the short rod of receiving is successively sleeved with the limiting nut, curtain frame and return spring from top to bottom, and the limiting nut is threadedly connected with the short rod of receiving, and the middle part of curtain frame is fixed with a guide column perpendicularly, and the guide column is sleeved with the guide sleeve arranged on the door board, and the middle part of left door and right door is equipped with the cross section of L card seat, and the door latch is arranged in the card seat and presses down the guide column, and the guide column drives the wind door curtain to move down and closes the gap between the door board and the ground. Compared with the prior art, the utility model has wide application range, high strength and good locking effect.

Description

Technical Field

[0001] This utility model pertains to ventilation doors, specifically a type of inter-pressure mine ventilation door. Background Technology

[0002] The function of mine ventilation doors is to open and close mine passages in a timely manner, and to isolate or restrict the airflow passing through the passages to meet the air volume requirements of the actual ventilation locations. They also provide some protection for workers or vehicles traveling within the mine passages. The door frame is usually installed on the wall of the mine passage, and the door panel is installed on the frame. To ensure smooth opening and closing of the door, a 5-15mm gap is usually set between the bottom of the door panel and the ground to avoid interference from the uneven ground surface of the mine passage. To ensure the airtightness of the door, a windproof curtain is generally installed at the bottom of the door panel. However, during actual opening and closing of the door, the windproof curtain will rub against the ground. On the one hand, the windproof curtain is prone to wear, reducing the airtightness of the door; on the other hand, it increases the resistance when opening and closing the door.

[0003] To address the aforementioned issues, some solutions have been proposed in the prior art. For example, patent document CN219139110U discloses a safety air door, which discloses using an adjustment mechanism to control the windshield curtain to move closer to or away from the ground to cover the gap between the door and the ground. However, this method requires external power to drive the adjustment mechanism, making it unsuitable for some special mining environments. Another example is patent document CN223227391U, which discloses a coal mine ventilation air door structure. It discloses using a hand-driven mechanism to control the sealing plate inside the door panel to move closer to or away from the ground to cover the gap between the door panel and the ground. However, this method requires a large rectangular groove inside the door panel, which weakens the door panel's strength. In summary, the existing technology currently lacks an air door that can cover the bottom gap without requiring external power and without affecting the air door's strength. Utility Model Content

[0004] The purpose of this invention is to overcome the problems of existing air doors requiring external power to cover the bottom gap and affecting the strength of the air door, and to provide a pressure-type mine air door with wide applicability, high strength and good locking effect.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a pressure-type mine ventilation door, including a door frame, a left door panel and a right door panel hinged to the door frame, and a door latch that limits the left and right door panels. The lower part of the left and right door panels is provided with a windproof curtain and several horizontally spaced "L"-shaped receiving short rods. The receiving short rods are fixedly connected to the door panels. The windproof curtain is composed of a curtain frame and a curtain. From top to bottom, a limit nut, a curtain frame and a return spring are sequentially sleeved on the receiving short rods. The limit nut is threaded to the receiving short rod. A guide post is vertically fixed in the middle of the curtain frame. The guide post is sleeved with a guide sleeve provided on the door panel. The middle part of the left and right door panels is provided with a "L"-shaped bracket. The door latch is placed in the bracket and presses down the guide post. The guide post drives the windproof curtain to move down and close the gap between the door panel and the ground.

[0006] Optionally, the curtain is a single piece made of rigid material and has a cushioning strip at the bottom.

[0007] Optionally, the curtain consists of multiple overlapping slats made of a soft material.

[0008] The method of using this utility model is as follows: When the damper is closed, take out the latch from the side and place it on the brackets of the left and right door panels. The bottom sides of the latch are in contact with the top of the guide post. The latch presses down on the guide post by its own weight. The guide post is linked to the windproof curtain. The curtain frame compresses the return spring. The windproof curtain moves down to close the gap between the door panel and the ground. The latch locks the left and right door panels, preventing the damper from opening. When the damper needs to be opened, lift the latch and place it aside. The return spring rebounds to the top curtain frame. The windproof curtain moves up to open the gap between the door panel and the ground. The door panel can then rotate smoothly.

[0009] The principle of this utility model is as follows: It combines the control of the windproof curtain with the door locking operation. The locking and unlocking of the door latch is used to link the upward and downward movement of the windproof curtain, forming a "latch-guide post-windproof curtain" linkage structure. This allows the windproof curtain to cover the gap at the bottom of the door panel when the door is closed, and does not interfere with the rotation of the door panel when the door needs to be opened. It achieves the effect of "locking means sealing, unlocking means passage". It does not require external power and does not weaken the strength of the door panel. It has a good range of applications and strength. In addition, through the cooperation of the guide post and the card seat, the locking point of the door is moved from the bottom of the door to the middle. The locking point located in the middle can better lock the door and is convenient to operate.

[0010] Compared with the prior art, the present invention has at least the following advantages: the present invention has a wide range of applications, high strength and good locking effect.

[0011] Does this utility model have the potential for patent authorization? Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; The following components are labeled as follows: door frame 1, left door panel 2, right door panel 3, door latch 4, windproof curtain 5, receiving short rod 6, limit nut 7, return spring 8, guide post 9, guide sleeve 10, and card seat 11. Detailed Implementation

[0013] The specific embodiments of this utility model are described below, but the embodiments are merely illustrative and not limiting.

[0014] refer to Figure 1 In this embodiment, the inter-pressure mine ventilation door includes a door frame 1, a left door panel 2 and a right door panel 3 hinged to the door frame, and a latch 4 limiting the left and right door panels. The lower part of the left and right door panels is provided with a windproof curtain 5 and two horizontally spaced "L"-shaped receiving short rods 6. The receiving short rods are fixedly connected to the door panels. The windproof curtain consists of a curtain frame and a curtain. The curtain frame has a square cross-section, and the back of the curtain frame is tightly attached to the surface of the door panel. The curtain frame has three vertically spaced holes along its horizontal direction. The curtain is made of flame-retardant and anti-static material. From top to bottom, a limiting nut 7, a curtain frame, and a return spring 8 are sequentially fitted onto the short rod. The limiting nut is threaded to the receiving short rod. A guide post 9 is vertically fixed in the middle of the curtain frame. The guide post has a square cross-section and is fitted with a guide sleeve 10 fixed on the door panel. An L-shaped bracket 11 is fixed in the middle of the left and right door panels. The door latch is placed in the bracket and presses down on the guide post. The guide post moves the windproof curtain down to close the gap between the door panel and the ground. The overall weight of the door latch is adapted to the elastic force of the return spring.

[0015] In this embodiment, in order to adapt to the relatively large wind pressure environment, the door curtain is made of a single piece of rigid material, with a cushioning strip at the bottom (to reduce impact and fill in small unevenness in the ground), and the door curtain covers both sides of the curtain frame.

[0016] In this embodiment, in order to adapt to uneven ground and improve the shielding effect, in environments with low wind pressure, the door curtain is composed of multiple overlapping slats. The slats are made of soft material and cover both sides of the curtain frame. Magnetic strips can also be provided on both sides of the slats as needed, and a counterweight strip is provided at the bottom.

[0017] The above description is merely a preferred embodiment of this utility model and is not intended to limit this embodiment in any way. Any person skilled in the art can make many possible variations and modifications to this invention, or modify it into equivalent embodiments, without departing from the scope of the invention's technical solution, using the methods and techniques disclosed above; all such modifications shall still fall within the protection scope of this utility model.

Claims

1. A pressure-type mine ventilation door, comprising a door frame (1), a left door panel (2) and a right door panel (3) hinged to the door frame, and a latch (4) for limiting the left and right door panels, characterized in that: The lower part of the left and right door panels is provided with a windproof curtain (5) and a receiving short rod (6). The receiving short rod is fixedly connected to the door panel. The windproof curtain is composed of a curtain frame and a curtain. From top to bottom, the receiving short rod is fitted with a limit nut (7), a curtain frame and a return spring (8). The limit nut is threadedly connected to the receiving short rod. A guide post (9) is vertically fixed in the middle of the curtain frame. The guide post is fitted with a guide sleeve (10) provided on the door panel. The middle part of the left and right door panels is provided with a "L" shaped card seat (11). The door latch is placed in the card seat and presses down the guide post. The guide post drives the windproof curtain to move down and close the gap between the door panel and the ground.

2. The inter-pressure mine ventilation door according to claim 1, characterized in that: The curtain is a single piece made of rigid material, with a cushioning strip at the bottom.

3. The inter-pressure mine ventilation door according to claim 1, characterized in that: The curtain consists of multiple overlapping slats made of a soft material.

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