Automatic locking device for mining safety door

Abstract

The utility model relates to the technical field of mining safety doors, and discloses an automatic locking device for a mining safety door, which comprises a safety door, a movable plate and a fixed plate, the movable plate is fixed to the free side of the safety door, the fixed plate is fixed to the other stand column, and after the safety door is closed, the movable plate is in lap joint with the fixed plate; the movable plate and the fixed plate are connected and fixed together through the locking structure; and the one-way unlocking structure is arranged on the fixing plate, and the connection state of the locking structure is released through the one-way unlocking structure. Compared with the prior art, the one-way unlocking device has the advantages that the one-way unlocking device is simple in structure and control mode, large-scale manufacturing and large-scale arrangement are facilitated, using is more convenient and reliable, the one-way unlocking structure is arranged, mistaken unlocking caused by collision and other phenomena is prevented through one-way rack restraining, and using is more convenient, reliable and safe.

Description

Technical Field

[0001] This utility model relates to the field of mining safety door technology, specifically to an automatic locking device for mining safety doors. Background Technology

[0002] Mine hoisting safety doors are a type of mine safety door, primarily used to prevent personnel, vehicles, and materials from falling into the mine shaft, ensuring the safety of mine operations. Mine hoisting safety doors are designed and operated in various ways, including manual, pneumatic, and electric, to ensure their flexibility and reliability. These safety measures work together to ensure the safe conduct of mine operations.

[0003] However, most existing mine safety doors are controlled by limit switches, which are complex in structure, costly, and uneconomical. Moreover, due to the harsh underground environment of coal mines, they often malfunction unexpectedly, resulting in poor reliability and affecting the normal safe production of the mine. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned technical difficulties and provide an automatic locking device for mine safety doors. Its structure and control method are simple, and it prevents accidental locking caused by collisions through unidirectional rack and pinion constraints.

[0005] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows:

[0006] An automatic locking device for a mine safety door includes a safety door mounted on a column of a lifting platform, and further includes:

[0007] The movable plate and the fixed plate are fixed to the free side of the safety door, and the fixed plate is fixed to another column. After the safety door is closed, the movable plate overlaps the fixed plate.

[0008] The locking structure connects and fixes the movable plate and the fixed plate together.

[0009] A one-way unlocking structure is installed on the fixed plate, which is used to release the locking structure from its connection state.

[0010] As an improvement, the locking structure includes a latch, a pressing block, a fixed magnetic block, a movable magnetic block, a slot, and a return spring. The latch is fixed to the rear side wall of the moving plate and has a through hole in the vertical direction. A slot is formed on the front side wall of the fixed plate corresponding to the latch. The pressing block is movably fitted into the slot and connected to the bottom of the slot through a return spring. The fixed magnetic block and the movable magnetic block are respectively set on the upper and lower sides of the pressing block. The fixed magnetic block is embedded in the lower side wall of the slot, and the movable magnetic block is slidably set in the upper side wall of the slot. After the moving plate overlaps the fixed plate, the latch is inserted into the slot and pushes the pressing block to move. The movable magnetic block passes through the through hole reserved in the latch and is attracted to the fixed magnetic block.

[0011] As an improvement, the one-way unlocking structure includes a handle and a connecting rod; a groove is formed on the rear side wall of the fixed plate, and the handle is slidably mounted on the groove; one end of the connecting rod is connected to the bottom of the handle, and the other end passes through the fixed plate and is connected and fixed together with the side wall of the movable magnetic block; and after the handle slides upward, the movable magnetic block disengages from the fixed magnetic block.

[0012] As an improvement, it also includes a trigger, a one-way rack, a toothed block, and a stop spring; the one-way rack is arranged vertically and fixed to the rear side wall of the fixed plate; the trigger is an L-shaped structure, with one end hinged to the handle and the other end fixed with a toothed block, which is connected to the handle through the stop spring. The toothed block engages with the one-way rack, and the handle cannot slide upward.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] 1. The structure and control method of this utility model are simple, which facilitates mass production and deployment, and makes it more convenient and reliable to use.

[0015] 2. This utility model is equipped with a one-way unlocking structure. Through one-way rack and pinion constraint, it prevents accidental locking caused by collisions and other phenomena, making it more convenient, reliable and safe to use. Attached Figure Description

[0016] Figure 1 This is an installation diagram of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 1 .

[0018] Figure 3 This is a schematic diagram of the structure of this utility model. Figure 2 .

[0019] Figure 4 This is a schematic diagram of the structure of this utility model. Figure 3 .

[0020] Figure 5 This is a cross-sectional schematic diagram of the present invention.

[0021] As shown in the figure: 1. Fixed plate; 2. Moving plate; 3. Locking tongue; 4. Slot; 5. Pressing block; 6. Movable magnetic block; 7. Fixed magnetic block; 8. Handle; 9. Trigger; 10. Return spring; 11. Contact spring; 12. One-way rack; 13. Tooth block; 14. Slide groove; 15. Connecting rod; 16. Lifting platform; 17. Safety door; 18. Column. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

[0023] The present invention will now be described in further detail with reference to the accompanying drawings.

[0024] An automatic locking device for mine safety doors, such as Figure 2 As shown, it includes a movable plate 2, a fixed plate 1, a locking structure, and a one-way unlocking structure, specifically:

[0025] Moving plate 2 and fixed plate 1 as follows Figure 4 As shown, both are vertically arranged plate structures, with the movable plate 2 positioned in front of the fixed plate 1.

[0026] Locking structures, such as Figure 5As shown, the system includes a locking tongue 3, a pressing block 5, a sleeve groove 4, a return spring 10, a fixed magnetic block 7, and a movable magnetic block 6. The locking tongue 3 is fixed to the rear side wall of the moving plate 2 and has a through hole in the vertical direction. A sleeve groove 4 is formed on the front side wall of the fixed plate 1 corresponding to the locking tongue 3. The pressing block 5 is movably sleeved in the sleeve groove 4 and connected to the bottom of the sleeve groove 4 through the return spring 10. The fixed magnetic block 7 and the movable magnetic block 6 are respectively set on the upper and lower sides of the pressing block 5. The fixed magnetic block 7 is embedded in the lower side wall of the sleeve groove 4, and the movable magnetic block 6 is slidably set in the upper side wall of the sleeve groove 4. The locking tongue 3 is inserted into the sleeve groove 4. After the moving plate 2 overlaps the fixed plate 1, the locking tongue 3 is inserted into the sleeve groove 4 and pushes the pressing block 5 to move to the rear. After the through hole aligns with the movable magnetic block 6, the movable magnetic block 6 passes through the through hole and is attracted together with the fixed magnetic block 7. At this time, the moving plate 2 and the fixed plate 1 are connected and fixed together by a locking structure (e.g., Figure 3 (As shown).

[0027] One-way unlocking structure such as Figure 2 , Figure 5 As shown, the assembly includes a handle 8, a trigger 9, a one-way rack 12, a toothed block 13, a contact spring 11, and a connecting rod 15. A pair of vertical grooves 14 are formed on the rear side wall of the fixed plate 1. The handle 8 is a U-shaped rod with its opening facing forward, and its upper end is slidably disposed in the groove 14. One end of the connecting rod 15 is connected to the bottom of the handle 8, and the other end passes through the fixed plate 1 and is connected and fixed together with the side wall of the movable magnetic block 6. The one-way rack 12 is arranged vertically and fixed on the rear side wall of the fixed plate 1 (the one-way rack 12 is disposed between the grooves 14). The trigger 9 is an L-shaped structure and is disposed inside the handle 8. A toothed block 13 is fixed to the front end of its horizontal section, and the bottom of its vertical section is hinged to the handle 8. After the top of the vertical section is connected to the handle 8 through the contact spring 11, the toothed block 13 abuts against the one-way rack 12 and cooperates with the one-way rack 12, preventing the handle 8 from sliding upward (under gravity, the handle 8 drives the movable magnetic block 6 to slide downward).

[0028] In the specific implementation of this embodiment:

[0029] like Figure 1 As shown, four columns 18 are fixed around the lifting platform 16, and a safety door 17 is provided between the two front columns 18. Guardrails are fixed between the other two columns 18. The movable plate 2 is fixed on the free side of the safety door 17, and the fixed plate 1 is fixed on the other column 18 of the two front columns 18.

[0030] After the workers and mine cars enter the lifting platform 16, the safety door 17 closes, and the moving plate 2 overlaps the fixed plate 1. The locking tongue 3 is inserted into the sleeve groove 4 and pushes the pressing block 5 to move to the rear until the perforation is aligned with the movable magnetic block 6. Then the movable magnetic block 6 passes through the perforation and is attracted together with the fixed magnetic block 7. At this time, the moving plate 2 and the fixed plate 1 are connected and fixed together by the locking structure.

[0031] When the lifting platform 16 is raised or lowered, it vibrates, and under the action of the resisting spring 11, the toothed block 13 abuts against the one-way rack 12 and cooperates with the one-way rack 12, so that the handle 8 cannot slide upward. The movable magnetic block 6 passes through the hole and is attracted together with the fixed magnetic block 7.

[0032] After the lifting platform 16 has finished lifting, press the inner trigger 9 of the handle 8, and the toothed block 13 will disengage from the one-way rack 12. Then control the handle 8 to slide upward, and drive the movable magnetic block 6 to disengage from the fixed magnetic block 7. Under the elastic force of the return spring 10, the pressing block 5 pushes out the locking tongue 3, and the locking structure connection state is released.

[0033] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An automatic locking device for a mine safety door, comprising a safety door (17) mounted on a column (18) of a lifting platform (16), characterized in that, Also includes: Movable plate (2) and fixed plate (1); the movable plate (2) is fixed on the free side of the safety door (17), and the fixed plate (1) is fixed on another column (18). After the safety door (17) is closed, the movable plate (2) overlaps on the fixed plate (1); The locking structure connects and fixes the movable plate (2) and the fixed plate (1) together. A one-way unlocking structure is set on the fixed plate (1), and the locking structure connection state is released by the one-way unlocking structure; The one-way unlocking structure includes a handle (8) and a connecting rod (15); a groove (14) is formed on the rear side wall of the fixing plate (1), and the handle (8) is slidably disposed on the groove (14). One end of the connecting rod (15) is connected to the bottom of the handle (8), and the other end passes through the fixing plate (1) and is connected and fixed together with the side wall of the movable magnetic block (6) of the locking structure. The one-way unlocking structure also includes a trigger (9), a one-way rack (12), a toothed block (13), and a stop spring (11); the one-way rack (12) is arranged vertically and fixed on the rear side wall of the fixed plate (1). The trigger (9) is an L-shaped structure, with one end hinged to the handle (8) and the other end fixed with a toothed block (13). After being connected to the handle (8) through the stop spring (11), the toothed block (13) cooperates with the one-way rack (12), and the handle (8) cannot slide upward.

2. The automatic locking device for a mine safety door according to claim 1, characterized in that: The locking structure includes a locking tongue (3), a pressing block (5), a sleeve groove (4), and a return spring (10). The locking tongue (3) is fixed on the rear side wall of the moving plate (2), and a sleeve groove (4) is formed on the front side wall of the fixed plate (1) corresponding to the locking tongue (3). The pressing block (5) is movably sleeved in the sleeve groove (4) and connected to the bottom of the sleeve groove (4) through the return spring (10). After the moving plate (2) overlaps on the fixed plate (1), the locking tongue (3) is inserted into the sleeve groove (4) and pushes the pressing block (5) to move.

3. The automatic locking device for a mine safety door according to claim 2, characterized in that: The locking structure also includes a fixed magnetic block (7) and a movable magnetic block (6); the lock tongue (3) has a pre-reserved through hole, the fixed magnetic block (7) and the movable magnetic block (6) are respectively set on the upper and lower sides of the pressing block (5), and the fixed magnetic block (7) is embedded in the lower side wall of the sleeve groove (4), the movable magnetic block (6) is slidably set in the upper side wall of the sleeve groove (4), the lock tongue (3) is inserted and fitted in the sleeve groove (4), and after the pressing block (5) is pushed to move, the movable magnetic block (6) passes through the pre-reserved through hole of the lock tongue (3) and is attracted together with the fixed magnetic block (7).

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