Inwardly limited mine explosion-proof door

Abstract

The utility model discloses a kind of inner limit type mining explosion-proof door, including main door frame and the main door leaf hinged therewith, main door leaf is equipped with auxiliary door frame, auxiliary door frame is hinged with auxiliary door leaf, main door leaf and auxiliary door leaf one-way open outward, simple door lock is equipped between main door frame and main door leaf, limit mechanism I is equipped between main door leaf and left and right side wall in explosion-proof chamber, at least one limit mechanism II is equipped between auxiliary door leaf and main door leaf, limit mechanism I is mainly composed of upper slide rail, slide bar, lower slide rail, limit strip, limit seat I and limit seat II, limit mechanism II is mainly composed of limit rod, limit seat III and limit seat IV. Compared with prior art, the utility model has good blast resistance, is safe and simple to use, and can evacuate personnel through auxiliary door leaf when the main fan cannot be normally opened.

Description

Technical Field

[0001] This utility model pertains to mining doors, specifically relating to an inner-limitation type explosion-proof mining door used in explosion-proof chambers. Background Technology

[0002] Explosion-proof mine doors are one of the key pieces of equipment for safe production in coal mines. They are mainly used in mine ventilation systems to effectively block the propagation of blast waves and high-temperature gases in emergencies such as gas or coal dust explosions, protecting miners' lives and underground equipment. Currently, explosion-proof mine doors may be severely deformed after being subjected to impact, rendering them unable to open properly and hindering subsequent rescue efforts.

[0003] To address the aforementioned issues, some technicians have proposed installing auxiliary door systems on explosion-proof doors. For example, patent document CN118223939A discloses a mine explosion-proof door that includes an auxiliary door on the main door. This solution allows for personnel evacuation when the main door cannot be opened normally. However, this solution has several problems: First, the door is mainly inserted laterally into the door frame for reinforcement via electromagnet attraction or inserting rods into slots. Under strong explosive impact, the sealing edges of the door frame, which ensure sealing performance, will be subjected to significant pressure. Due to the limitations of the one-way outward opening structure, stress is concentrated on the hinged side of the door, while the non-hinged side is prone to deformation under impact, potentially causing the door to detach from the door frame and lose its explosion-proof function. Second, opening the auxiliary door relies on the breaking of a baffle, making it cumbersome and passive. Third, the door contains many precision components, requiring improvements in strength, reliability, and maintenance difficulty. Utility Model Content

[0004] The purpose of this utility model is to overcome the problems existing in the existing mine explosion-proof doors and provide an inner-limitation mine explosion-proof door with good explosion-proof performance, safe and simple use, and the ability to evacuate personnel through the auxiliary door when the main door cannot be opened normally.

[0005] The technical solution adopted by this utility model to solve its technical problem is: an internal limit type mine explosion-proof door, including a main door frame and a main door leaf hinged thereto, an auxiliary door frame is provided on the main door leaf, an auxiliary door leaf is hinged on the auxiliary door frame, the main door leaf and the auxiliary door leaf open outwards in one direction, a simple door lock is provided between the main door frame and the main door leaf, a limiting mechanism I is provided between the main door leaf and the left and right side walls in the explosion-proof room, and at least one limiting mechanism II is provided between the auxiliary door leaf and the main door leaf; The limiting mechanism I mainly consists of an upper slide rail, a slide rod, a lower slide rail, a limiting strip, a limiting seat I, and a limiting seat II. The upper slide rail and the lower slide rail are fixed to the side wall. The two ends of the slide rod are slidably connected to the upper slide rail and the lower slide rail. The limiting strip is fixed perpendicularly to the slide rod and is distributed at intervals along its axial direction. The limiting seat I and the limiting seat II are fixed to the side wall and the main door leaf respectively and are distributed at intervals along its vertical direction. The limiting strip, the limiting seat I, and the limiting seat II correspond one to one. The slide rod drives the limiting strip laterally to pass through the limiting seat I and the limiting seat II, and the limiting strip contacts the main door frame. The limiting mechanism II mainly consists of a limiting rod, a limiting seat III, and a limiting seat IV. The limiting seat III and the limiting seat IV are fixed on the main door leaf and the auxiliary door leaf, respectively. The limiting rod is placed in the grooves vertically opened in the limiting seat III and the limiting seat IV, and the limiting rod is in contact with the auxiliary door frame.

[0006] Optionally, the limiting mechanism I further includes positioning seat I and positioning seat II, which are fixed on the side wall and distributed on both sides of the slide rod. The slide rod is magnetically fixed to positioning seat I and positioning seat II.

[0007] Optionally, the limiting seat III is distributed on both sides of the auxiliary door leaf, and the groove it opens is a concave corner groove, which limits the limiting rod in the lateral and longitudinal directions.

[0008] The utility model is used as follows: The main door frame is installed in the entrance and exit of the explosion-proof room by embedding. The auxiliary door is connected to the main door by a limiting rod, limiting seat III, and limiting seat IV. When explosion-proof is required, after personnel enter the explosion-proof room, they close the main door, close the simple door lock, and then push the sliding rod to connect the limiting strip with limiting seat I and limiting seat II. After the impact, push the sliding rod to disengage the limiting strip from limiting seat II, open the simple door lock, and open the main door for evacuation. If the main door is damaged and cannot be opened, remove the limiting rod on the auxiliary door and evacuate personnel through the auxiliary door.

[0009] The principle of this utility model is as follows: An auxiliary door leaf is nested on the main door leaf to serve as an emergency evacuation passage. The two doors are connected as a whole by a limiting mechanism II, which enhances structural stability. The limiting strip contacts the main door frame, and the limiting rod contacts the auxiliary door frame, forming a seal together. Normally, this does not affect the normal opening of the main door leaf. When the main door leaf is damaged and cannot be opened, the limiting rod can be removed to open the auxiliary door leaf for personnel evacuation, making it safe and simple to use. The main door leaf and the auxiliary door leaf are connected as a whole by the limiting mechanism II, allowing the impact force to be transmitted to the entire main door leaf. The main door leaf is directly connected to the inner side wall of the explosion-proof interior through the limiting mechanism I, forming an "inner limiting" structure. The impact force can be transmitted to the side wall of the building structure through the limiting strip and the limiting seat, preventing the door frame seal from bearing all the pressure along the edge, thereby improving the overall explosion-proof performance of the explosion-proof door.

[0010] Compared with the prior art, the present invention has at least the following advantages: the present invention has good explosion-proof performance, is safe and easy to use, and can evacuate people through the auxiliary door when the main door cannot be opened normally. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the rear view structure of this utility model; The following are the detailed markings in the attached drawings: main door frame 1, main door leaf 2, auxiliary door frame 3, auxiliary door leaf 4, upper slide rail 5, slide rod 6, lower slide rail 7, limit bar 8, limit seat I 9, limit seat II 10, limit rod 11, limit seat III 12, limit seat IV 13, positioning seat I 14, positioning seat II 15. 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 internal limit type explosion-proof mine door includes a main door frame 1 and a main door leaf 2 hinged thereto. An auxiliary door frame 3 is provided on the main door leaf, and an auxiliary door leaf 4 is hinged on the auxiliary door frame. Both the main door frame and the auxiliary door frame are provided with sealing edges. The main door leaf and the auxiliary door leaf open outward in one direction and contact the sealing edges for sealing. A simple door lock is provided between the main door frame and the main door leaf. The simple door lock consists of a door bolt and a door frame. The door bolt is inserted into the door frame to complete the locking. Door handles are provided on the main door leaf and the auxiliary door leaf. A limiting mechanism I is provided between the main door leaf and the left and right side walls inside the explosion-proof chamber, and two limiting mechanisms II are provided between the auxiliary door leaf and the main door leaf. The limiting mechanism I mainly consists of an upper slide rail 5, a slide rod 6, a lower slide rail 7, a limiting strip 8, a limiting seat I 9, and a limiting seat II 10. The upper and lower slide rails are horizontally and parallelly fixed to the side wall. The two ends of the slide rod are slidably connected to the upper and lower slide rails. The slide rod can be equipped with pulleys or balls at both ends to improve sliding performance. One end of the limiting strip is vertically fixed to the slide rod and is distributed at intervals along its axial direction. The limiting seats I and II are fixed to the side wall and the main door leaf respectively and are distributed at intervals along their vertical direction. The limiting strip, limiting seat I, and limiting seat II correspond one-to-one. The limiting seats I and II are provided with through holes. To save effort, the slide rod can be equipped with a linear drive device as needed. The linear drive device can be a hand-cranked drive mechanism (manual drive mechanism such as a hand-cranked wheel plus gear and rack mechanism) or an automatic drive mechanism (pneumatic or electric push rod). Under the action of external force, the slide rod drives the limiting strip laterally through the limiting seats I and II, and the limiting strip contacts the main door frame. The limiting mechanism II mainly consists of a limiting rod 11, a limiting seat Ⅲ 12, and a limiting seat Ⅳ 13. The limiting seat Ⅲ and the limiting seat Ⅳ are fixed on the main door leaf and the auxiliary door leaf, respectively. The limiting rod is placed in the grooves that are vertically opened from top to bottom in the limiting seat Ⅲ and the limiting seat Ⅳ, and the limiting rod is in contact with the auxiliary door frame.

[0014] In this embodiment, the limiting mechanism I further includes positioning seat I 14 and positioning seat II 15. Positioning seat I and positioning seat II are fixed on the side wall and distributed on both sides of the slide rod. The slide rod is magnetically fixed to positioning seat I and positioning seat II to prevent the slide rod from causing the limiting strip to fall off and lock or affecting the rotation of the main door leaf.

[0015] In this utility model, the limiting seat Ⅲ is distributed on both sides of the auxiliary door leaf, and the groove opened therein is a concave corner groove, that is, one end of the horizontal through groove is blocked, which limits the limiting rod in the horizontal and vertical directions, so that the limiting rod can be more stably fixed to the main door leaf and the auxiliary door leaf without affecting the normal opening and closing of the main door leaf.

[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 utility model using the disclosed methods and techniques, or modify it into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model; all such modifications shall still fall within the protection scope of this utility model.

Claims

1. An internal-limited explosion-proof mine door, comprising a main door frame (1) and a main door leaf (2) hinged thereto, an auxiliary door frame (3) provided on the main door leaf, an auxiliary door leaf (4) hinged on the auxiliary door frame, the main door leaf and the auxiliary door leaf opening outwards in one direction, and a simple door lock provided between the main door frame and the main door leaf, characterized in that: Limiting mechanism I is provided between the main door leaf and the left and right side walls inside the explosion-proof room, and at least one limiting mechanism II is provided between the auxiliary door leaf and the main door leaf; The limiting mechanism I mainly consists of an upper slide rail (5), a slide rod (6), a lower slide rail (7), a limiting strip (8), a limiting seat I (9), and a limiting seat II (10). The upper slide rail and the lower slide rail are fixed on the side wall. The two ends of the slide rod are slidably connected to the upper slide rail and the lower slide rail. The limiting strip is fixed vertically to the slide rod and is distributed at intervals along its axial direction. The limiting seat I and the limiting seat II are fixed on the side wall and the main door leaf respectively and are distributed at intervals along its vertical direction. The limiting strip, the limiting seat I, and the limiting seat II correspond one to one. The slide rod drives the limiting strip to pass through the limiting seat I and the limiting seat II laterally. The limiting strip contacts the main door frame. The limiting mechanism II is mainly composed of a limiting rod (11), a limiting seat III (12) and a limiting seat IV (13). The limiting seat III and the limiting seat IV are fixed on the main door leaf and the auxiliary door leaf respectively. The limiting rod is placed in the grooves opened vertically in the limiting seat III and the limiting seat IV, and the limiting rod is in contact with the auxiliary door frame.

2. The explosion-proof mine door with internal limit as described in claim 1, characterized in that: The limiting mechanism I also includes positioning seat I (14) and positioning seat II (15). Positioning seat I and positioning seat II are fixed on the side wall and distributed on both sides of the slide rod. The slide rod is magnetically fixed to positioning seat I and positioning seat II.

3. The internal limit explosion-proof door for mines according to claim 1, characterized in that: Limiting seats III are distributed on both sides of the auxiliary door leaf, and the grooves they have are internal corner grooves, which limit the lateral and longitudinal movement of the limiting rod.

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