A protection device for the locking of the access barrier of a gangue bin

Abstract

The utility model discloses a kind of gangue warehouse upper mouth guardrail access control locking protection devices, including the belt deviation switch of being installed on fence and the fixing member of being installed on fence door;The vertical roll of belt deviation switch is towards fence door;The bottom of fixing member is equipped with lifting hook;When belt deviation switch is initial state, vertical roll is horizontal state;When belt deviation switch is deviation state, vertical roll is inclined upward and located on lifting hook;The utility model installs belt deviation switch to the fence of gangue warehouse upper mouth, then installs corresponding fixing member on fence door, when operating personnel enters gangue warehouse upper mouth operation, the vertical roll of belt deviation switch is connected with fixing member, belt deviation switch passes inductive signal to the protection switch of rubber belt conveyor at this time, can guarantee that rubber belt conveyor is in stop state, reduce the work risk of operating personnel.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine gangue silo operation protection technology, and particularly relates to a gangue silo upper guardrail gate interlocking protection device. Background Technology

[0002] Coal mine gangue bins are facilities used for storing gangue underground or on the surface of coal mines. They play an important role in storing, buffering, and transferring gangue during coal mine production.

[0003] During coal mine production, due to special reasons, personnel need to enter the upper part of the gangue bin for work. At this time, if the belt conveyor is running, it will bring great safety risks to the workers.

[0004] For example, when workers open the guardrail door of the gangue bin to break rocks, if the belt conveyor is running, the gangue falling from the belt may injure the workers (i.e., falling object risk) or scratch them (i.e., mechanical injury risk). Utility Model Content

[0005] The purpose of this utility model is to provide a gate access control and locking protection device for the top of a gangue silo, so as to reduce the risk to workers when working at the top of the gangue silo.

[0006] The present invention adopts the following technical solution: a protective device for the upper gate of a coal bin, comprising a belt misalignment switch installed on the fence and a fixing component installed on the fence gate; The vertical roller of the belt misalignment switch faces the fence gate; The bottom of the fastener is equipped with a hook; When the belt misalignment switch is in its initial state, the vertical roller is horizontal; when the belt misalignment switch is in the misalignment state, the vertical roller is tilted upward and positioned on the hook.

[0007] The beneficial effects of this utility model are as follows: This utility model installs the belt misalignment switch on the fence at the top of the gangue bin, and then installs the corresponding fixing parts on the fence gate. When the workers enter the top of the gangue bin to work, the vertical roller of the belt misalignment switch is connected to the fixing parts. At this time, the belt misalignment switch transmits the sensing signal to the protection switch of the belt conveyor, which can ensure that the belt conveyor is in a stopped state and reduce the working risks of the workers. Attached Figure Description

[0008] Figure 1 This is a reference diagram showing the initial state of a steel bin upper guardrail gate interlocking protection device according to an embodiment of the present invention; Figure 2 This is a reference diagram showing the activation state of a gate interlocking protection device for the upper opening of a coal bin, according to an embodiment of this utility model. Figure 3 for Figure 2 A magnified view of a portion of the image; Figure 4 This is a schematic diagram showing the connection between a gate access control and a protective switch at the top of a coal bin, according to an embodiment of this utility model.

[0009] Among them: 10. Fence gate; 20. Fixture; 21. Hook; 22. Spring; 30. Belt misalignment switch; 31. Vertical roller; 40. Fence; 50. Mounting parts; 60. Support parts; 70. Protective switch. Detailed Implementation

[0010] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0011] In the upper area of ​​a coal mine gangue silo, when workers need to enter the area above the silo opening for special operations such as maintenance or unblocking, the belt conveyor is in a power-off and stopped state. However, in existing technology, the fence gate at the upper opening of the gangue silo generally lacks an interlocking mechanism with the belt conveyor.

[0012] When operators open the fence gate to enter the hazardous area, if the belt conveyor is not effectively powered off or is accidentally started due to misoperation, it can easily cause personal injury accidents such as mechanical entanglement and falling objects. To ensure the safety of personnel working at the top of the gangue silo, this utility model adds an access control and locking protection device to the fence gate of the gangue silo, realizing the automatic power-off, shutdown, and locking function of the belt conveyor when the gate is opened.

[0013] This utility model discloses a protective device for the upper gate of a coal silo, including a belt misalignment switch 30 installed on the fence 40 and a fixing member 20 installed on the fence gate 10; the vertical roller 31 of the belt misalignment switch 30 faces the fence gate 10; a hook 21 is installed at the bottom of the fixing member 20; wherein, as Figure 1 As shown, when the belt misalignment switch 30 is in its initial state, the vertical roller 31 is in a horizontal state; Figure 2 As shown, when the belt misalignment switch 30 is in the misalignment state, the vertical roller 31 tilts upward and is located on the hook 21.

[0014] This utility model installs the belt misalignment switch 30 on the fence 40 at the top of the gangue bin, and then installs the corresponding fixing part 20 on the fence gate 10. When the operator enters the top of the gangue bin, the vertical roller 31 of the belt misalignment switch 30 is connected to the fixing part 20. At this time, the belt misalignment switch 30 transmits the sensing signal to the protection switch 70 of the belt conveyor, which can ensure that the belt conveyor is in a stopped state and reduce the working risk of the operator.

[0015] This embodiment uses the belt misalignment switch 30 in conjunction with the fixed structure on the fence gate 10 to form a physical interlock, thereby automatically triggering a protection signal when the gate's state changes. The fence 40 is used to define the boundary of the danger zone at the top of the waste bin and serves as the main load-bearing structure supporting the entire device. The vertical roller 31 is a key sensing component of the belt misalignment switch 30. Its axis is set perpendicular to the ground and can rotate around its base after being pushed. After reaching a certain angle, it triggers the internal micro switch, issuing a misalignment alarm or emergency stop signal. The vertical roller 31 is arranged facing the fence gate 10 so that its movement path is directly aligned with the closed position of the gate, allowing for direct contact or cooperation with the gate's side components.

[0016] The fixing component 20 is fixedly installed on the fence gate 10 and moves synchronously with the gate. Specifically, the bottom of the fixing component 20 is provided with a hook 21, which has an upward-facing U-shaped structure and its size is adapted to the top shape of the vertical roller 31, so as to hook the vertical roller. The belt misalignment switch 30 is maintained in the initial state, that is, the vertical roller is kept in a horizontal position, the switch contacts are closed, and the belt conveyor is allowed to start and run normally.

[0017] When workers need to enter the work area and open the fence gate 10, they pull the vertical roller 31 upwards, simultaneously pulling the hook 21 to keep the vertical roller 31 tilted upwards, causing the belt misalignment switch 30 to send a "misalignment" signal to the protection switch 70. Figure 4 As shown, the normally closed terminal of the belt misalignment switch 30 is connected to the emergency stop interface of the protective switch 70 of the belt conveyor. Therefore, when the protective switch 70 receives a "misalignment" signal, the belt conveyor 70 cannot start until the operator finishes work and returns the vertical roller 31 to a horizontal state, at which point the belt conveyor 70 can be started.

[0018] As an alternative implementation, the lateral width of the hook 21 can be designed to be slightly larger than the diameter of the vertical roller 31 to tolerate a certain range of installation deviations or door sway.

[0019] The synergistic effect between the components is reflected in the following: the fence 40 provides a stable support foundation, the belt misalignment switch 30 undertakes the signal sensing and output functions, and the vertical roller 31 serves as the execution endpoint of the mechanical linkage. This structural design achieves intrinsically safe interlocking without the need for additional power supply or control modules.

[0020] like Figure 3 As shown, the fixing member 20 includes a fixing block that is fixedly connected to the fence gate 10. A spring 22 is provided at the bottom of the fixing block, and the spring 22 is connected to the top of the hook 21.

[0021] By introducing a spring as an intermediate connecting element between the fixing block and the hook, the hook has a certain degree of freedom of vertical movement during locking and unlocking, thereby improving the smoothness and reliability of the device's operation. The fixing component 20 is used to stably install the hook 21 onto the fence gate 10 and ensure its consistent position during gate movement. The fixing block is a block-shaped structure made of metal and can be firmly fixed to the fence gate 10 by welding or bolting. Its shape can be cuboid, cylinder, or other geometric shapes suitable for the installation space, as long as it meets the requirements of structural strength and installation stability.

[0022] Spring 22 is located at the bottom of the fixed block, and its function is to provide vertical elastic support for hook 21. One end of spring 22 is connected to the fixed block, and the other end is connected to the top of hook 21, forming a series elastic suspension structure. Spring 22 can be a compression spring or a tension spring. The stiffness coefficient of the spring can be reasonably selected according to the resistance that the vertical roller 31 needs to overcome when entering the hook and the buffer amount required for centering adjustment. A guide sleeve can also be provided on the outside of spring 22 to limit its lateral displacement during compression or tension and improve the coaxiality of movement.

[0023] The hook 21 is a metal component with an upward-opening U-shaped or L-shaped bent structure. Its top is connected to the spring 22, and its bottom is used to accommodate the vertical roller 31 of the belt misalignment switch 30.

[0024] A support member 60 is also provided below the fixed block to support the horizontally positioned vertical roller 31. By adding the support member 60 below the fixed block, the position of the vertical roller 31 in its initial state is limited and auxiliaryly supported, thereby improving the structural stability of the entire locking device under static conditions. The support member 60, as a supplementary component to the structural function of the fixed member 20, is designed to provide physical support for the horizontally positioned vertical roller 31, preventing accidental deflection of the roller due to external vibration, wind disturbance, or slight collisions, which could lead to false triggering. The shape of the support member 60 can be designed as a plate, block, or L-shaped bracket, depending on the actual installation space, as long as it can effectively support the bottom of the horizontally placed vertical roller. In terms of installation, the support member 60 can be fixed to the fence 40 or the lower structure of the fixed block by welding or bolting, ensuring that its spatial position matches the height of the vertical roller 31 when the door is closed, achieving precise support.

[0025] There is no rigid connection between the support member 60 and the vertical roller 31; a surface contact or line contact support relationship is formed only when the vertical roller 31 is in a horizontal state. The support member 60 does not restrict the rotation path of the vertical roller 31, allowing it to move smoothly.

[0026] Furthermore, the position adjustment of the support member 60 is adjustable. In some variant embodiments, fine-tuning of the vertical or horizontal position can be achieved by setting elongated hole mounting holes or adding an adjusting screw structure, so as to adapt to the height and angle tolerance of the vertical roller of different models of belt misalignment switches 30, thereby improving the versatility of the device and the flexibility of on-site assembly. In other optional embodiments, an elastic buffer layer, such as a rubber pad or a polyurethane coating, can also be provided on the surface of the support member 60 to reduce the rigid impact when it contacts the vertical roller 31, extend its service life, and avoid sparks generated by metal-to-metal friction, making it suitable for coal mine operations with high explosion-proof requirements.

[0027] The presence of support member 60 alters the force distribution pattern of vertical roller 31 in a static state, transforming it from a single-point cantilever force to a multi-point supported force, effectively reducing the probability of unexpected actions caused by localized stress concentration or dynamic loads. This structural design is particularly suitable for scenarios with equipment operating vibrations or ground vibrations caused by frequent personnel passage, ensuring the reliable operation of the interlocking protection device in complex industrial environments.

[0028] The fence 40 is equipped with an installation component 50, which includes two spaced-apart clamps, and a belt misalignment switch 30 is installed between the two clamps.

[0029] This embodiment achieves stable fixation and convenient adjustment of the belt misalignment switch 30 by setting an installation component consisting of two spaced clamps on the fence. The installation component 50 serves as the support and connection structure for the belt misalignment switch 30. Its main body consists of a pair of parallel metal clamps, forming an installation space of a certain width between the two clamps. The housing of the belt misalignment switch 30 is embedded in this space and locked in place by transversely inserted fastening bolts or pins.

[0030] The two clamps are fixed to the posts or beams of the fence 40 by welding or bolting, forming a U-shaped frame structure. This ensures the rigidity of the installation components while facilitating on-site assembly and subsequent maintenance. The inner surface of the clamps can be textured with anti-slip material or fitted with a rubber pad to increase friction with the housing of the belt misalignment switch and prevent positional shift due to vibration during equipment operation.

[0031] Mounting component 50 provides a stable mounting base for belt misalignment switch 30. The clamping structure restricts its freedom of movement in three-dimensional space, ensuring that the vertical roller 31 is always within the preset trigger angle range. At the same time, this mounting method allows the position of the switch to be adjusted according to the actual installation height and the opening and closing trajectory of the door, so that the vertical roller can accurately bear the action force of the hook 21 and improve the reliability of the locking response.

Claims

1. A protective device for the upper gate of a coal silo, characterized in that, Includes a belt misalignment switch (30) installed on the fence (40) and a fastener (20) installed on the fence gate (10); The vertical roller (31) of the belt misalignment switch (30) faces the fence gate (10). The bottom of the fastener (20) is equipped with a hook (21); When the belt misalignment switch (30) is in the initial state, the vertical roller (31) is in the horizontal state; when the belt misalignment switch (30) is in the misalignment state, the vertical roller (31) is tilted upward and located on the hook (21).

2. The steel silo top guardrail gate interlocking protection device as described in claim 1, characterized in that, The fastener (20) includes a fixing block that is fixedly connected to the fence gate (10), and a spring (22) is provided at the bottom of the fixing block. The spring (22) is connected to the top of the hook (21).

3. The steel silo top guardrail gate interlocking protection device as described in claim 2, characterized in that, A support member (60) is also provided below the fixed block, which is used to support the horizontal vertical roller (31).

4. A protective device for the upper gate of a coal silo as described in claim 2 or 3, characterized in that, The fence (40) is provided with an installation component (50), which includes two spaced clamps, and the belt misalignment switch (30) is installed between the two clamps.

5. The steel silo top guardrail gate interlocking protection device as described in claim 4, characterized in that, The normally closed end of the belt misalignment switch (30) is connected to the emergency stop interface of the protection switch (70) of the belt conveyor.

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