A linkage type adjustable safety protection device for mine shaft mouth

Abstract

The utility model discloses a kind of linkage type adjustable safety protection devices for mine shaft mouth, including protective net component, vertical pole, guide piece, tow rope, winch mechanism and control circuit. Protective net component is evenly distributed in wellhead periphery, is formed by net body and multiple vertical poles, net body is bridged between adjacent vertical poles and is fixed in vertical pole length direction. Tow rope is led out from vertical pole top end, is connected to winch mechanism after being backfolded through guide piece, and winch mechanism is driven by motor reel to tighten or loosen tow rope, so that vertical pole is synchronously turned up or turned over, and protective net is unfolded or folded in turn. Hinged structure is equipped with limiting device, to ensure that vertical pole is slightly inclined after turning up, and can be automatically returned under the action of gravity when rope is loosened. Motor is controlled by underground control circuit to start and stop uniformly, to realize the automatic protection of unattended mine shaft mouth, effectively improve operation safety and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mine safety protection technology, and in particular to a linkage-type adjustable safety protection device for mine entrances. Background Technology

[0002] In the daily operations of vertical shaft mines, the cage (mine elevator) undertakes the vertical transportation of personnel, materials, and ore. To ensure the safety of operations in the shaft opening area during cage operation, safety protection facilities are usually required to prevent personnel or equipment from accidentally entering the shaft. However, in some vertical shaft mines, especially older mines or mines with harsh environmental conditions (such as mines in high humidity, high dust, and high cold regions), the shaft opening area often lacks a fixed safety platform or a complete protective structure due to limited space and strong environmental corrosivity.

[0003] Existing safety measures mainly rely on personnel on duty to set up simple barriers or warning lines during cage operation. However, due to human negligence, fatigue, or emergencies, there is a risk of delayed or even ineffective protective responses, which can easily lead to accidents such as personnel falling into the mine. Furthermore, the long-term need for dedicated personnel on duty significantly increases the mine's operation and maintenance costs. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a linkage-type adjustable safety protection device for mine shaft entrances. This device achieves automatic linkage between the cage operation and the shaft entrance warning fence through a mechanical transmission structure, requiring no manual intervention. It features a simple structure and reliable operation. The technical solution adopted is as follows:

[0005] An adjustable, linkage-type safety protection device for mine shaft openings includes a protective net assembly evenly distributed around the shaft opening. The assembly consists of a net body and multiple uprights. The net body spans between adjacent uprights, and both sides of the net body are fixed along the length of each upright. There are at least three uprights, each with its bottom hinged to the ground around the shaft opening. The uprights are laid flat on the ground with their heads facing the center of the shaft opening, allowing the net body to unfold and form a closed protective surface when the uprights are flipped up. The device also includes several guide members corresponding to the number of uprights and traction ropes. The guide members are arranged in a straight line extending outward along the axial direction of the uprights, and the traction ropes extend from the shaft opening. After passing through the guide, the rope folds back and is fixed to the end of the upright. The other end of each traction rope is connected to a winch mechanism located at the wellhead. The winch mechanism can simultaneously tighten or loosen multiple traction ropes. When the traction ropes tighten simultaneously, the upright rises to an upright position, and the protective net opens to form a ring-shaped protective circle. When the traction ropes loosen, the upright falls to the ground under its own weight, and the protective net retracts. The hinge structure is equipped with a limit device to limit the upright from rising to a near-vertical position when the traction ropes tighten, keeping the upright slightly tilted inward and preventing it from continuing to tilt outward. When the traction ropes loosen, the upright can automatically fall to a retracted position under its own weight due to the shift in its center of gravity.

[0006] Furthermore, the hoisting mechanism includes a motor and a drum mounted on the motor output shaft, with the other end of the traction rope wound around the drum.

[0007] Furthermore, the mine shaft is equipped with a control circuit. The motor is controlled to start, stop, and rotate in both directions via this circuit, enabling the synchronous tightening or loosening of multiple traction ropes. This drives the uprights to simultaneously rise to a near-vertical position or fall to a retracted position, causing the protective net to unfold or retract accordingly. This structure automatically unfolds and retracts the protective net when personnel enter or leave the mine, eliminating reliance on manual operation. It is suitable for automatic safety protection at unattended mine entrances, improving operational safety and protection efficiency.

[0008] Furthermore, there are multiple winch mechanisms, the same number as the number of poles, distributed at the wellhead, with one winch mechanism corresponding to one traction rope.

[0009] Furthermore, the motors of the multiple winch mechanisms are centrally controlled by a control circuit installed underground. The control circuit includes a main control unit and multiple output channels electrically connected to each winch mechanism, which are used to send start / stop and forward or reverse commands to each motor simultaneously to ensure that each pole is lifted or overturned synchronously.

[0010] Furthermore, the number of uprights is preferably 4 or 6, evenly distributed around the wellhead to form a continuous protective ring.

[0011] Furthermore, the mesh is preferably made of nylon mesh, flame-retardant nylon mesh, or synthetic fiber mesh, which has lightweight, flexible, and wear-resistant properties, and is suitable for the mining working environment.

[0012] Furthermore, the guide element can be a guide pulley or a guide ring, used to guide the direction of the traction rope and reduce friction.

[0013] Furthermore, the limiting device includes a pin at the bottom of the upright and limiting plates installed on both sides. The limiting plates are provided with limiting stop structures. When the upright is flipped up to a near-vertical position, the pin contacts the limiting plate stop structure to prevent the upright from continuing to flip outward.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This utility model has a reasonable structural design. Through the cooperation of guide components, traction ropes, and hinged uprights, the uprights can be flipped up or down synchronously, allowing the protective net to automatically unfold or retract according to the working state. It has the following beneficial effects:

[0016] Automated protection avoids the instability caused by manual operation;

[0017] The protective netting does not affect the raising and lowering of the cage or the wellhead operations when it is retracted, thus improving work efficiency.

[0018] The pole limiting structure ensures stability after being flipped up and prevents the protection from failing due to external forces;

[0019] It has a simple structure, is easy to manufacture and install, and is highly adaptable, making it suitable for use in various types of mines. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the embodiment of the present invention in the folded state;

[0021] Figure 2 This is a schematic diagram of the present invention in its working state.

[0022] Figure 3 This is a side view of an embodiment of the present invention in its working state;

[0023] Figure 4 This is a schematic diagram of the upright pole being erected in an embodiment of this utility model;

[0024] Figure 5 This is a schematic diagram of the upright pole being laid flat in an embodiment of this utility model.

[0025] Among them, 1. Net body; 2. Upright pole; 201. Hinged structure; 202. Pin shaft; 203. Limiting plate; 3. Wellhead; 4. Guide component; 5. Traction rope; 6. Motor; 7. Drum. Detailed Implementation

[0026] The following will describe the technology of the embodiments of the present utility model clearly and completely with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present utility model. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present utility model can be combined with each other.

[0027] Reference Figures 1-5 This embodiment proposes a linkage-type adjustable safety protection device for mine wellheads, including a protective net assembly. The protective net assembly is evenly arranged around the perimeter of the wellhead 3. The protective net assembly consists of a flexible net body 1 and multiple uprights 2. The net body 1 spans between adjacent uprights 2 and is fixed along the length of each upright 2, so that when the uprights 2 are flipped up, the net body 1 unfolds accordingly to form a closed protective surface. The number of uprights 2 is not less than 3, preferably 4 or 6, and they are evenly distributed on the ground around the wellhead 3. The bottom of each upright 2 is fixed to the ground around the wellhead 3 by a hinge structure 201, and the head of the upright 2 is laid flat on the ground with the center of the wellhead 3 facing the ground, so that it will not interfere with the normal operation of the wellhead 3 when it is retracted.

[0028] The device also includes several guide members 4 corresponding to the number of uprights 2 and traction ropes 5. The guide members 4 are arranged in a straight line extending outward along the axial direction of the uprights 2 to guide the traction ropes 5 and reduce friction. The traction ropes 5 start from the wellhead 3, pass through the guide members 4, fold back and are fixed to the end of the uprights 2 to ensure that the traction force can be evenly transmitted to each upright 2.

[0029] The other end of each traction rope 5 is connected to a winch mechanism located at the wellhead 3. The winch mechanism includes a motor 6 and a drum 7 mounted on the motor's output shaft. The other end of the traction rope 5 is wound around the drum 7. When the motor 6 drives the drum 7 to rotate, multiple traction ropes 5 can be tightened or loosened simultaneously. When the traction ropes 5 are tightened simultaneously, the uprights 2 are simultaneously lifted to an upright position under the action of tension, and the protective net opens to form a ring-shaped protective circle; when the traction ropes 5 are loosened, the uprights 2 fall to the ground under their own weight, and the protective net closes.

[0030] The hinge structure 201 is equipped with a limiting device, which is used to limit the upright 2 from flipping up to a near-vertical position when the traction rope 5 is tightened, so that the upright 2 is kept slightly inward and prevents it from continuing to flip outward; when the traction rope 5 is slack, the upright 2 can automatically flip down to the folded state under its own weight due to the shift of the center of gravity, ensuring that the protective net is successfully folded up.

[0031] It should be noted that the motor 5 is controlled by a control circuit installed underground to start, stop, and rotate in both directions, enabling the synchronous tightening or loosening of multiple traction ropes 5. This drives the uprights 2 to flip up or down simultaneously, causing the protective net to unfold or retract accordingly. The motor has a built-in overload protection function; when the traction ropes are tightened to the preset tension or the uprights are flipped to the limit position, the motor will automatically stop working. The motor uses a gear reduction mechanism with self-locking characteristics, maintaining the drum position without rotation after power failure, thus ensuring continuous tension of the traction ropes and stable unfolding of the protective net.

[0032] Preferably, the number of winch mechanisms is the same as the number of poles 2, which is 4, with one winch mechanism corresponding to one traction rope 5. The motors 6 of the winch mechanisms are centrally controlled by a control circuit installed underground. The control circuit includes a main control unit and multiple output channels electrically connected to each motor 6, which can uniformly send start / stop and forward / reverse commands to each motor 6 to achieve synchronous tightening or loosening of multiple traction ropes.

[0033] Preferably, the mesh body 1 is made of nylon mesh, flame-retardant nylon mesh or synthetic fiber mesh, which has lightweight, flexible and wear-resistant properties and is suitable for the mining operation environment.

[0034] Preferably, the guide member 4 can be a guide pulley or a guide ring, used to guide the direction of the traction rope and reduce friction.

[0035] Preferably, the limiting device includes a pin 202 at the bottom of the upright 2 and limiting plates 203 installed on both sides. The limiting plates 203 are provided with a limiting stop structure. When the upright 2 is flipped up to a near vertical position, the pin 202 contacts the stop structure of the limiting plate 203 to form a mechanical limit.

[0036] This structure can automatically deploy and retract the protective net when underground workers enter or leave the mine, avoiding reliance on manual operation. It is suitable for automatic safety protection at unattended mine entrances, effectively improving operational safety and protection efficiency.

[0037] The working principle of this embodiment:

[0038] The protective net assembly is normally in a retracted state, with the net body 1 and multiple uprights 2 close to the ground. The heads of the uprights 2 face the center of the well opening 3 and are placed flat on the ground around the well opening 3, so as not to affect the normal entry and exit of personnel and equipment.

[0039] When underground workers prepare to enter the mine, the motor 6 is started via the control circuit installed underground, driving the winch mechanism. The drum 7 of the winch mechanism begins to rotate, synchronously tightening the traction rope 5. The traction force acts on the traction rope 5 fixed to the top of the upright 2, causing multiple uprights 2 to flip up synchronously in a plane along their own axes. During the flipping process of the uprights 2, the protective net unfolds along with the uprights, eventually forming a protective ring around the mine entrance. When the uprights 2 are flipped up to near a vertical position, the pin 202 at the bottom of the upright 2 contacts the stop structure on the limit plate 203, achieving mechanical limitation and preventing the uprights 2 from continuing to flip outward. At this time, the overload protection mechanism built into the motor 6 senses that the tension has reached a preset threshold, automatically stopping the winch mechanism. At the same time, the self-locking function of the motor 6 keeps the drum 7 in a fixed position, keeping the traction rope 5 in a taut state, ensuring the stable unfolding of the protective net.

[0040] When the underground workers finish their work and prepare to leave the mine, the control circuit reverses the motor 6, and the winch mechanism releases the tension of the traction rope 5. Due to the hinged structure 201 and its limiting device, the upright 2 remains slightly tilted inward, causing its center of gravity to deviate from the support axis. After the tension of the traction rope 5 is released, the upright 2 automatically flips down to the ground along its original path under its own weight, allowing the protective net to retract and return to an open state, facilitating the entry and exit of subsequent personnel or equipment.

[0041] Under the unified control of the underground control circuit, the entire protective device can automatically deploy and retract the wellhead protection without manual intervention. It is particularly suitable for unattended mine wellhead scenarios, effectively improving operational safety and protection efficiency.

Claims

1. A linkage-type adjustable safety protection device for mine shaft entrances, characterized in that, The system includes a protective net assembly, which comprises a net body and multiple uprights. The net body spans between adjacent uprights, and both sides of the net body are fixed along the length of each upright. The number of uprights is no less than three. The bottom of each upright is fixed to the ground outside the well opening through a hinged structure, and the head of the upright is laid flat on the ground with the center of the well opening facing it. The device also includes several guides and traction ropes corresponding to the number of uprights. The guides are arranged in a straight line extending outward along the axial direction of the uprights. The traction ropes start from the wellhead, pass through the guides, fold back, and are fixed to the end of the uprights. The other end of each traction rope is connected to a winch mechanism located at the wellhead. The winch mechanism is used to simultaneously tighten or loosen multiple traction ropes. The hinge structure is equipped with a limit device.

2. The linkage-type adjustable safety protection device for mine shaft openings according to claim 1, characterized in that, The hoisting mechanism includes a motor and a drum mounted on the motor output shaft, with the other end of the traction rope wound around the drum.

3. The linkage-type adjustable safety protection device for mine shaft openings according to claim 2, characterized in that, The mine shaft is equipped with a control circuit, and the motor is controlled through the underground control circuit.

4. A linkage-type adjustable safety protection device for mine shaft openings according to claim 3, characterized in that, There are multiple winch mechanisms, distributed at the wellhead, with multiple traction ropes corresponding to each winch mechanism.

5. A linkage-type adjustable safety protection device for mine shaft openings according to claim 4, characterized in that, The motors of the multiple winches are centrally controlled by a control circuit installed underground. The control circuit includes a main control unit and multiple output channels electrically connected to each motor.

6. A linkage-type adjustable safety protection device for mine shaft openings according to claim 1, characterized in that, The number of uprights is 4 or 6.

7. A linkage-type adjustable safety protection device for mine shaft openings according to claim 1, characterized in that, The mesh can be made of any one of nylon mesh, flame-retardant nylon mesh, or synthetic fiber mesh.

8. A linkage-type adjustable safety protection device for mine shaft openings according to claim 1, characterized in that, The guide component can be a guide pulley or a guide ring.

9. A linkage-type adjustable safety protection device for mine shaft openings according to claim 1, characterized in that, The limiting device includes a pin at the bottom of the pole and limiting plates installed on both sides, with a limiting stop structure on the limiting plates.

Images