Direct pressure mine air door

Abstract

The utility model discloses a straight 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 air door curtain, the short rod of receiving and the guide short rod, and the short rod of receiving and the guide short rod are fixedly connected with the door board, and the air door curtain is composed by 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 guide short rod is located the lower part in the middle part of curtain frame, and the curtain frame is sleeved on the guide short rod, and the door latch both ends are equipped with the counterweight part, and the counterweight part of door latch is respectively sleeved on the guide short rod of left door and right door, and the counterweight part of door latch presses down curtain frame, and the air door curtain moves down and closes the gap between door board and ground. Compared with the prior art, the utility model has good application range and strength.

Description

Technical Field

[0001] This utility model pertains to ventilation doors, specifically a direct-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 ventilation doors requiring external power to cover the bottom gap and affecting the strength of the ventilation door, and to provide a direct-pressure mine ventilation door with better applicability and strength.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a direct-pressure 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, several horizontally spaced "L"-shaped receiving short rods and "L"-shaped guide short rods. The receiving short rods and guide 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 limiting nut, a curtain frame and a return spring are sequentially sleeved on the receiving short rod. The limiting nut is threadedly connected to the receiving short rod. The guide short rod is located below the middle of the curtain frame. The curtain frame is sleeved on the guide short rod. The two ends of the door latch are provided with counterweights. The counterweights at both ends of the door latch are respectively sleeved on the guide short rods of the left and right door panels. The counterweights of the door latch press down on the curtain frame, and the windproof curtain moves down to 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 put the counterweights at both ends of the latch onto the guide rods of the left and right door panels respectively. The counterweights of the latch contact the lower curtain frame, the curtain frame compresses the return spring, the windproof curtain moves down to close the gap between the door panel and the ground, and 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, and the door panel rotates smoothly.

[0009] The principle of this utility model is to combine the control of the windproof curtain with the door locking operation. The locking and unlocking of the door latch is used to link the windproof curtain to move up and down. When the door is closed, the windproof curtain covers the gap at the bottom of the door panel. When the door needs to be opened, it does not interfere with the rotation of the door panel, achieving the effect of "locking is sealing, unlocking is passage". It does not require external power and will not weaken the strength of the door panel. It has a good range of applications and strength.

[0010] Compared with the prior art, the present invention has at least the following advantages: the present invention has a better scope of application and strength. Attached Figure Description

[0011] 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, guide short rod 7, limit nut 8, return spring 9. Detailed Implementation

[0012] The specific embodiments of this utility model are described below, but the embodiments are merely illustrative and not limiting.

[0013] refer to Figure 1 In this embodiment, the direct-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, two horizontally spaced "L"-shaped receiving short rods 6, and an "L"-shaped guide short rod 7. The receiving short rods and guide 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 limit nut 8, a curtain frame, and a return spring 9 are sequentially fitted onto the rod. The limit nut is threadedly connected to the receiving short rod. The guide short rod is located below the middle of the curtain frame. The curtain frame is fitted onto the guide short rod. The bolt has counterweights at both ends with vertical holes. The counterweights at both ends of the bolt move down to avoid the receiving short rod, increasing the downward movement of the bolt. The counterweights at both ends of the bolt are fitted onto the guide short rods of the left and right door panels, respectively. The counterweights of the bolt press down on the curtain frame. The overall weight of the bolt is adapted to the elastic force of the return spring, and the windproof curtain moves down to close the gap between the door panel and the ground.

[0014] In this embodiment, in order to adapt to a relatively high wind pressure environment, the door curtain is made of a single piece of rigid material, such as rigid plastic, and has a cushioning strip at the bottom (to reduce impact and fill in small unevenness in the ground). The door curtain covers both sides of the curtain frame.

[0015] 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 materials, such as rubber. The slats 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.

[0016] 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 direct-pressure 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), a receiving short rod (6) and a guide short rod (7). The receiving short rod and the guide short rod are fixedly connected to the door panel. The windproof curtain is composed of a curtain frame and a curtain. The receiving short rod is fitted with a limit nut (8), a curtain frame and a return spring (9) from top to bottom. The limit nut is threaded to the receiving short rod. The guide short rod is located below the middle of the curtain frame. The curtain frame is fitted on the guide short rod. The door latch is provided with counterweights at both ends. The counterweights at both ends of the door latch are fitted on the guide short rods of the left and right door panels respectively. The counterweights of the door latch press down on the curtain frame, and the windproof curtain moves down to close the gap between the door panel and the ground.

2. The direct-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 direct-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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