An explosion-proof and intrinsic safety type device for detecting a flight chain

Abstract

The utility model relates to coal mine safety monitoring technical field especially, relate to a kind of explosion-proof and intrinsic safety type device for scraper chain detection, the device includes shell, lens shield, toughened glass, groove inner sealing gasket, red copper backing plate, pressing plate, machine core bottom plate, machine core vice plate, knurled copper column, rubber shock absorber, anti-explosion camera wiring board, epoxy adapter board, cable entry device, explosion-proof chamber and intrinsic safety circuit board assembly, toughened glass is set in shell front end, it is sealed installation by pressing plate and red copper backing plate, groove is embedded and is provided with sealing gasket;Camera module is fixed in machine core vice plate by damping structure, and is connected with outside by isolation column, cable entry device etc., the device has explosion-proof structure and intrinsic safety circuit, it is applicable to flammable and explosive environment such as coal mine underground, realize the real-time high-definition monitoring of the running state of scraper chain, with compact structure, installation is convenient, strong sealing, high safety level and other advantages.

Description

Technical Field

[0001] This utility model relates to the field of coal mine safety monitoring technology, and in particular to an explosion-proof and intrinsically safe device for detecting scraper chains. Background Technology

[0002] Scraper conveyors, as key equipment in underground coal mine conveying systems, are widely used for the continuous transport of raw coal in mining faces. One of their core components—the scraper chain—can easily lead to conveying interruptions, equipment damage, and even major safety accidents if it experiences chain breakage, chain slippage, severe wear, or loosening during operation. Therefore, real-time monitoring and early warning of the scraper chain's operating status are crucial for ensuring safe production in coal mines.

[0003] In the existing technology, the monitoring of scraper chains in coal mines is still mainly based on manual inspection or simple non-explosion-proof cameras for video monitoring. However, manual inspection is inefficient, has blind spots, and cannot provide real-time warnings; ordinary camera equipment generally has the following problems: (1) the structure does not have explosion-proof or intrinsic safety protection capabilities and cannot operate stably for a long time in the dangerous environment of gas and coal dust explosions; (2) the equipment installation structure is unreasonable, with poor waterproof, dustproof, and shockproof performance, easy to be damaged, and difficult to maintain; (3) the signal output has not been intrinsically safed, and there is a risk of electric sparks or short circuits, which does not meet the requirements of the Coal Mine Safety Regulations for the intrinsic safety of electrical equipment.

[0004] Therefore, there is an urgent need for a scraper chain detection device that has both explosion-proof structure and intrinsically safe circuit protection, and can work stably in complex underground environments. It should not only realize high-definition image acquisition and remote transmission of chain status, but also have excellent sealing, shockproof and dustproof capabilities, thereby improving the level of automated monitoring in coal mines and ensuring the safe and efficient operation of the conveying system. Utility Model Content

[0005] The purpose of this invention is to provide an explosion-proof and intrinsically safe device for detecting scraper chains, so as to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a flameproof and intrinsically safe device for scraper chain detection, comprising a housing, tempered glass, lens cover, copper pad, pressure plate, mechanism base plate, mechanism sub-plate, single-pass knurled copper column, rubber shock absorber, epoxy adapter plate, PCB board isolation column, cable entry device, and explosion-proof terminal block. The housing is an integral metal flameproof structure with an internal flameproof cavity for accommodating a camera module, a data interface module, and a power interface module. An opening is provided at the front end of the housing, and the tempered glass is horizontally positioned at this opening and secured by bolts through the copper pad and pressure plate. The mechanism is fixed to the housing, forming a reliable and sealed explosion-proof structure. The base plate of the mechanism is horizontally fixed to the bottom of the explosion-proof cavity, and the sub-plate of the mechanism is set above it. It is connected to the base plate of the mechanism at intervals by several single-pass knurled copper pillars. The lower end of the single-pass knurled copper pillar is fixed to the base plate of the mechanism by a threaded connection, and the upper end is connected to the sub-plate of the mechanism by an interference fit, forming an immovable rigid support structure. The back of the sub-plate of the mechanism is bonded to an intrinsically safe Ethernet output protection board and processing module by an epoxy adapter plate. The pads on the epoxy adapter plate and the PCB board isolation pillars together form a spatial isolation structure for the intrinsically safe circuit.

[0007] According to the above technical solution, the lens cover is threadedly connected to the front end of the housing and is used to protect the camera assembly.

[0008] According to the above technical solution, the rubber shock absorber is disposed between the base plate of the mechanism and the housing, is vertically installed and has a compression stroke of 2mm, and is used to suppress vibration.

[0009] According to the above technical solution, two cable entry devices are provided on the side wall of the housing.

[0010] According to the above technical solution, the cable introduction device is an explosion-proof double-sealed cable connector, and is fixedly connected to the housing by inner and outer double O-rings and metal nuts.

[0011] According to the above technical solution, the explosion-proof joint surface of the shell meets the welding process requirements of "L≥12mm, ic≤0.25mm" to achieve the explosion-proof performance of the overall device.

[0012] According to the above technical solution, the lens cover is made of stainless steel and has an arc-shaped front end to resist the impact of underground dust.

[0013] Compared with existing technologies, the beneficial effects achieved by this utility model are as follows: This utility model, through a dual-cavity shell design combining an explosion-proof structure and an intrinsically safe circuit spatial isolation structure, significantly improves the intrinsic safety performance and explosion-proof protection capability of the camera equipment in mining environments; the multi-layer sealing structure of tempered glass, copper pads, and pressure plates achieves reliable explosion-proof and pressure-resistant sealing at the front opening, ensuring a clear field of view and stable equipment operation; the use of a threaded + interference fit rigid support structure composed of single-pass knurled copper pillars ensures the camera module remains fixed and stable even in strong vibration environments in mines; the addition of rubber shock absorbers effectively absorbs external vibration transmission from the shell, preventing damage to internal modules; the bonding of the core sub-board and epoxy adapter board, along with the spatial distribution of PCB board isolation pillars, constructs a high-isolation circuit structure that meets intrinsically safe electrical distance requirements, further improving the electrical safety performance of the equipment; in summary, this utility model is suitable for the visual monitoring of the scraper chain's operating status in high-risk explosive environments such as coal mines and tunnels. It has a compact structure, is safe and reliable, and possesses good potential for widespread application. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a front view of an explosion-proof and intrinsically safe device for detecting scraper chains proposed in this utility model;

[0016] Figure 2 This is a cross-sectional view (AA) of an explosion-proof and intrinsically safe device for detecting scraper chains proposed in this utility model.

[0017] Figure 3 This is a BB cross-sectional view of an explosion-proof and intrinsically safe device for detecting scraper chains proposed in this utility model;

[0018] Figure 4 This is a CC cross-sectional view of an explosion-proof and intrinsically safe device for detecting scraper chains proposed in this utility model;

[0019] Figure 5 This is a top view of an explosion-proof and intrinsically safe device for detecting scraper chains proposed in this utility model.

[0020] In the diagram: 1. Housing, 2. Lens hood, 3. Copper pad, 4. Pressure plate, 5. Tempered glass, 6. Mechanism base plate, 7. Single-pass knurled copper column, 8. Mechanism sub-plate, 9. In-slot sealing gasket, 10. PCB board isolation column, 11. Cable entry device, 12. Rubber shock absorber, 13. Epoxy adapter plate, 14. Explosion-proof terminal block, 15. Explosion-proof cavity. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example:

[0023] Reference Figure 1-5 An explosion-proof and intrinsically safe device for scraper chain inspection includes a housing 1, a lens cover 2, a copper pad 3, a pressure plate 4, tempered glass 5, a mechanism base plate 6, a single-pass knurled copper column 7, a mechanism sub-plate 8, a groove sealing gasket 9, a PCB board isolation column 10, a cable entry device 11, a rubber shock absorber 12, an epoxy adapter plate 13, an explosion-proof wiring plate 14, and an explosion-proof cavity 15. The housing 1 is an integral metal explosion-proof structure with an internal explosion-proof cavity 15 for accommodating the camera module and the data / power interface module. The tempered glass 5 is installed at the front opening of the housing 1. The tempered glass 5 is bolted to the housing 1 through the copper pad 3 and the pressure plate 4 to achieve a fixed connection and ensure explosion-proof sealing performance. The lens cover 2 is directly screwed into the front end of the housing 1 to protect the camera assembly from underground dust impact. The tempered glass 5 is horizontally arranged at the front end of the housing 1 to ensure that the global exposure high-definition camera can obtain a clear field of view in low-light environments.

[0024] The base plate 6 of the mechanism is horizontally fixed to the bottom of the housing 1. The sub-plate 8 of the mechanism is set on the top and fixed to the base plate 6 at intervals through a single-pass knurled copper column 7. The single-pass knurled copper column 7 is connected by threads and interference fit at the top and bottom respectively, forming an immovable rigid support. To further suppress vibration, a rubber shock absorber 12 is vertically installed between the base plate 6 of the mechanism and the housing 1, with a compression stroke of 2mm, to ensure that the camera assembly can still work stably without damaging the components in the vibration environment of the mine. The back of the sub-plate 8 of the mechanism is firmly bonded to the intrinsically safe Ethernet output protection board and processing module through an epoxy adapter plate 13. The pads on the epoxy adapter plate 13 and the PCB board isolation column 10 together form a spatial isolation structure for the intrinsically safe desktop circuit. The explosion-proof joint surface adopts the shell welding process that meets the requirements of L≥12mm and ic≤0.25mm to meet the explosion-proof level requirements.

[0025] Two cable entry devices 11, namely explosion-proof double-sealed cable connectors, are located on the side wall of the housing 1. These connectors achieve explosion-proof and dustproof sealing with external power lines and Cat6e Ethernet cables through inner and outer double O-rings and metal nuts. After the wires are introduced, they are fixedly connected to the stud terminals on the explosion-proof terminal block 14. The explosion-proof terminal block 14 is welded to the inside of the housing 1 via studs, ensuring reliable wiring and enabling quick maintenance and replacement. All metal parts are connected using bolts, riveting, or interference fits. Moving parts are limited to the adjustable mounting bracket (not shown in the figure), whose hinge axis allows the camera to rotate ±15° around the horizontal axis to accommodate different monitoring angles. Furthermore, a grooved sealing gasket 9 is provided at the mounting surface of the housing, and effective clamping force is formed through threaded tightening, thus providing dual protection of sealing and explosion-proof.

[0026] In this embodiment, when the device is working, the high-definition camera captures images of the scraper chain running outward through the lens cover 2 inside the explosion-proof cavity 15. The image signal is converted by the intrinsically safe Ethernet output protection board and the epoxy adapter board 13, and then sent out to the ground monitoring system through the cable introduction device 11. The rubber shock absorber 12 and the single-pass knurled copper column 7 work together to effectively suppress vibration interference. The copper pad 3 and the pressure plate 4 ensure that there is a sufficient explosion-proof path between the tempered glass 5 and the shell 1. The explosion-proof wiring board 14 ensures the long-term stability of all electrical connections in high humidity and high dust environments through a double-sealed structure.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An explosion-proof and intrinsically safe device for scraper chain inspection, comprising a housing (1), tempered glass (5), a lens cover (2), a copper pad (3), a pressure plate (4), a mechanism base plate (6), a mechanism sub-plate (8), a single-pass knurled copper column (7), a rubber shock absorber (12), an epoxy adapter plate (13), a PCB board isolation column (10), a cable entry device (11), and an explosion-proof terminal block (14), characterized in that: The housing (1) is an integral metal explosion-proof structure, and an explosion-proof cavity (15) is provided inside it. The explosion-proof cavity (15) is used to accommodate the camera module, the data interface module and the power interface module. The front end of the housing (1) is provided with an opening, the tempered glass (5) is horizontally set at the opening, and is bolted and fastened to the housing (1) through the copper pad (3) and the pressure plate (4) to form a reliable sealed explosion-proof structure; The base plate (6) of the mechanism is horizontally fixed at the bottom of the explosion-proof cavity (15), and the sub-plate (8) of the mechanism is set above it and is connected to the base plate (6) of the mechanism at intervals by a number of single-pass knurled copper columns (7). The lower end of the single-pass knurled copper column (7) is fixed to the base plate (6) of the mechanism by a threaded connection, and the upper end is connected to the sub-plate (8) of the mechanism by an interference fit, forming an immovable rigid support structure. The back of the sub-board (8) of the mechanism is bonded to an intrinsically safe Ethernet output protection board and a processing module via the epoxy adapter board (13). The pads on the epoxy adapter board (13) and the PCB board isolation pillars (10) together form a spatial isolation structure for the intrinsically safe circuit.

2. The explosion-proof and intrinsically safe device for detecting scraper chains according to claim 1, characterized in that: The lens cover (2) is threaded to the front end of the housing (1) and is used to protect the camera assembly.

3. The explosion-proof and intrinsically safe device for detecting scraper chains according to claim 1, characterized in that: The rubber shock absorber (12) is installed between the base plate (6) of the mechanism and the housing (1), and is vertically mounted with a compression stroke of 2mm, in order to suppress vibration.

4. The explosion-proof and intrinsically safe device for detecting scraper chains according to claim 1, characterized in that: Two cable entry devices (11) are provided on the side wall of the housing (1).

5. The explosion-proof and intrinsically safe device for detecting scraper chains according to claim 1, characterized in that: The cable entry device (11) is an explosion-proof double-sealed cable connector, and is fixedly connected to the housing (1) by inner and outer double O-rings and metal nuts.

6. The explosion-proof and intrinsically safe device for detecting scraper chains according to claim 1, characterized in that: The explosion-proof joint surface of the housing (1) meets the welding process requirements of "L≥12mm, ic≤0.25mm" to achieve the explosion-proof performance of the overall device.

7. The explosion-proof and intrinsically safe device for detecting scraper chains according to claim 1, characterized in that: The lens cover (2) is made of stainless steel and has an arc-shaped front end to resist the impact of underground dust.

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