Linkage locking device
By using the design of the interlocking device's pins, springs, and wire ropes, the mutually exclusive opening states of the large and small doors in the mine ventilation door system are realized, solving the problem that the large and small doors cannot be interlocked in the existing technology, improving safety and reliability, and simplifying the structural design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-24
- Publication Date
- 2026-03-03
AI Technical Summary
In existing mine ventilation door systems, the large and small doors cannot be interlocked, posing a safety hazard. Furthermore, they rely on external energy sources, have complex structures, and are prone to failure.
Design a linkage locking device that uses the linkage of a bolt, spring and wire rope to achieve mutually exclusive opening states of the large and small doors. The mechanical design of the counterweight and spring ensures safety, prevents both doors from opening at the same time, and does not rely on external energy.
The system achieves interlocking between the large and small doors, enhancing security, preventing structural instability caused by simultaneous opening of both doors, improving system reliability, simplifying the structure, and reducing dependence on external energy.
Smart Images
Figure CN223964322U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mine ventilation door technology, and in particular to a linkage locking device. Background Technology
[0002] The opening status of the ventilation door (hereinafter referred to as the main door) with a pedestrian access door (hereinafter referred to as the small door) underground is as follows:
[0003] When the main door opens, the small door opens simultaneously, and when the small door opens, the main door opens simultaneously; the two doors are synchronized, and interlocking cannot be achieved.
[0004] When the main door opens automatically, the side door cannot be locked. A separate mechanical lock needs to be added to the side door or the side door needs to be manually locked.
[0005] The small door was opening when a vehicle passed by and the main door opened automatically, posing a risk of people being squeezed or pinched.
[0006] The equipment is composed of complex counterweights, wire ropes, pulley blocks and other materials. If any of these are missing, the locking function cannot be completed.
[0007] Traditional mechanical locks rely on the self-discipline of personnel;
[0008] It relies on external energy sources such as gas, electricity, and air pumps.
[0009] To address this, this application designs a linkage locking device that locks the main door when the smaller door is opened, thus achieving linkage locking between the large and small doors and ensuring that the two doors (one large and one small) cannot be opened simultaneously, thereby enhancing security. Summary of the Invention
[0010] To overcome the shortcomings of the prior art, this utility model provides a linkage locking device.
[0011] A linkage locking device includes a housing installed between a main door and a side door, characterized in that:
[0012] The outer casing is equipped with latches at its upper and lower ends. The upper latch is used to lock the main door, and the lower latch is used to lock the side door. A spring is installed inside the casing to drive the latches to move, so as to realize the linkage locking of the main door and the side door.
[0013] Furthermore, in order to better realize this utility model, a door latch is provided at the upper end of the outer shell, and the bottom of the door latch is connected to a first lock via a first connecting chain. The first lock is hooked to a second lock, and a counterweight is suspended above the second lock via a first steel wire rope. The first steel wire rope is linked to the door, and the first steel wire rope loosens during the opening of the door.
[0014] Furthermore, in order to better realize this utility model, a small door latch is provided at the lower end of the outer shell, and a fourth latch is connected above the small door latch via a second connecting chain. The fourth latch is hooked to a third latch, and the lower end of a first spring is connected above the third latch. The upper end of the first spring is connected below the second latch.
[0015] Furthermore, in order to better realize this utility model, the lower end of the third latch is connected to the upper end of the second spring and the second steel wire rope, and the lower end of the second spring is connected to the outer shell.
[0016] Furthermore, in order to better realize this utility model, the outer shell uses a nano-coating, which is formed into a uniform and dense protective layer by high-temperature sintering, and the coating thickness is controlled within ±0.1μm.
[0017] Furthermore, in order to better realize this utility model, the latch is made of ABS engineering plastic.
[0018] The beneficial effects of this utility model are:
[0019] This invention employs a mutually exclusive design, achieving physical exclusivity (one open, one closed) between the large and small doors through the linkage of counterweight, spring, and latches. This avoids the safety hazards of traditional independent operation modes (such as structural instability caused by simultaneous opening of both doors). The two latches are positioned in different directions, creating spatial locking redundancy. The bidirectional compression capability of the spring ensures a rapid response of the locking action. The mechanical design does not rely on external energy sources (electricity / gas supply), making it more reliable than programmed locking. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the installation position of this utility model;
[0021] Figure 2 This is a schematic diagram of the structure of this utility model.
[0022] In the picture,
[0023] 1. Door bolt, 2. First connecting chain, 3. First latch, 4. Second latch, 5. Outer shell, 6. First spring, 7. Third latch, 8. Fourth latch, 9. Second spring, 10. First wire rope, 11. Counterweight, 12. Second connecting chain, 13. Small door bolt, 14. Second wire rope. Detailed Implementation
[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0025] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0026] Figures 1-2 In a specific embodiment of this utility model, the interlocking device is installed inside the outer casing 5 between the main gate (main air door) and the side gate (pedestrian door). In the initial state, the main gate is closed, and the counterweight 11 is suspended above the second latch 4 by the first steel wire rope 10, in a suspended state, with the first steel wire rope 10 in a taut state.
[0027] The small door locking mechanism is implemented as follows:
[0028] Door opening triggers locking: When the door is opened, the movement of the door leaf causes the first steel wire rope 10 to slack, losing its tension on the counterweight 11.
[0029] Counterweight sinking linkage: The counterweight 11 moves downward due to gravity, pressing the second latch 4, which drives the first latch 3 and the first connecting chain 2 to move downward synchronously.
[0030] Spring compression and bolt locking: The descent of the first connecting chain 2 forces the door bolt 1 to move downwards, simultaneously compressing the first spring 6. The compression force of the first spring 6 further pushes the third latch 7, causing the fourth latch 8, the second connecting chain 12, and the small door bolt 13 to move downwards. Finally, the small door bolt 13 inserts into the fixed end of the small door, achieving physical locking of the small door.
[0031] The door locking mechanism is implemented as follows:
[0032] In the initial state, the small door is closed, the second steel wire rope 14 is connected to the upper part of the second spring 9, and at this time the second steel wire rope 14 is in an expanded state and the second spring 9 is in a stretched state.
[0033] Small door opening triggers locking: During the opening of the small door, the second steel wire rope 14 changes from taut to slack, and the second spring 9 contracts. When the small door is fully opened, the movement of the door leaf causes the second steel wire rope 14 to slack, and the second spring 9 releases its elastic potential energy from the compressed state instantaneously.
[0034] This embodiment has the following detailed design features:
[0035] Redundancy design: If the first connecting chain 2 or the second connecting chain 12 fails due to wear, the other path can still be locked by the elastic force of springs 6 and 9.
[0036] Adaptive adjustment: The first wire rope 10 and the second wire rope 14 adopt a pre-tightened winding structure, which automatically compensates for slack when the door moves, ensuring the stability of the locking action.
[0037] Extreme environment adaptation: The nano-coating of the outer shell can withstand a temperature range of -40℃ to 120℃ and humid, dusty downhole environments, preventing corrosion.
[0038] Maintenance and debugging
[0039] Post-installation debugging: By adjusting the weight of counterweight 11 and the stiffness of springs 6 and 9, the locking force requirements of different door types can be matched.
[0040] Periodic maintenance: Apply grease to the locking contact surfaces every quarter and check the tension of wire ropes 10 and 14 and the smoothness of displacement of pins 1 and 13.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any other modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, should be covered within the scope of the claims of this utility model.
Claims
1. A linkage locking device, comprising a housing (5) installed between a main door and a side door, characterized in that: The outer shell (5) is provided with pins at its upper and lower ends respectively. The upper pin is used to lock the main door and the lower pin is used to lock the small door. A spring is provided inside the outer shell (5) to drive the pins to move, so as to realize the linkage locking of the main door and the small door.
2. The interlocking device according to claim 1, characterized in that: The upper end of the outer shell (5) is provided with a door latch (1). The bottom of the door latch (1) is connected to the first latch (3) via the first connecting chain (2). The first latch (3) is hooked to the second latch (4). A counterweight (11) is suspended above the second latch (4) via the first steel wire rope (10). The first steel wire rope (10) is linked to the door. During the opening of the door, the first steel wire rope (10) loosens.
3. The interlocking device according to claim 2, characterized in that: The lower end of the outer shell (5) is provided with a small door latch (13). The upper part of the small door latch (13) is connected to the fourth latch (8) via the second connecting chain (12). The fourth latch (8) is hooked to the third latch (7). The upper part of the third latch (7) is connected to the lower end of the first spring (6). The upper end of the first spring (6) is connected to the lower part of the second latch (4).
4. The interlocking device according to claim 3, characterized in that: The lower end of the third latch (7) is connected to the upper end of the second spring (9) and the second wire rope (14). The lower end of the second spring (9) is connected to the outer shell (5).
5. The interlocking device according to claim 1, characterized in that: The outer shell (5) uses a nano-coating, which is formed by high-temperature sintering to form a uniform and dense protective layer. The coating thickness is controlled within ±0.1μm.