Slip ring explosion-proof structure

Abstract

The invention relates to the technical field of anti-explosion equipment, in particular to a slip ring anti-explosion structure which comprises a slip ring and an anti-explosion shell arranged outside the slip ring. A connecting mechanism is arranged at the joint of the explosion-proof shell and the junction box; the connecting mechanism is provided with an alarm mechanism, the alarm mechanism is used for monitoring a gap value between joint surfaces of the connecting mechanism, and when the gap value does not meet a preset condition, the alarm mechanism gives a safety alarm. The safety and reliability of the slip ring explosion-proof structure are remarkably improved, the structure is simple, and the cost is low; the connection mechanism ensures the tight connection between the explosion-proof housing and the junction box, and the alarm mechanism realizes the intelligent monitoring of the gap between the joint surfaces, can quickly give an alarm when the gap is abnormal, and provides timely safety early warning for operators.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof equipment, in particular to a slip ring explosion-proof structure. Background Art

[0002] In the operation of closed circular coal yards, the storage and handling of coal is one of the core links. Due to the high volatility of coal itself, a large amount of flammable and explosive gases and dust are easily generated in the coal yard, which puts forward strict safety requirements for the operation of equipment in the coal yard. As a key equipment in the coal yard, the stacker-reclaimer is responsible for the storage and extraction of coal. The stability and safety of its operation are directly related to the overall operation efficiency and personnel safety of the coal yard. In order to ensure the safe operation of the stacker-reclaimer in the coal yard, especially for its key functions such as power supply, control, communication, water supply, and gas supply, explosion-proof electrical products must be used. Among them, the slip ring equipment, as a key component connecting the stacker-reclaimer with the external ground system, not only needs to achieve 360° rotation to meet the needs of all-round operation of the equipment, but also must have explosion-proof function to prevent the explosion of flammable and explosive dust caused by electrical sparks or high temperature during rotation and power supply.

[0003] However, the explosion-proof slip rings for stackers and reclaimers in the prior art have certain limitations in design and application. On the one hand, in order to meet the high-power power supply requirements of stackers and reclaimers, the rated current of existing explosion-proof slip rings is generally high, usually above 1000 amperes, and most of these slip rings adopt positive pressure explosion-proof technology. Positive pressure explosion-proof technology relies on access to a fresh and clean air source from the outside of the coal yard, and continuously supplies air to the inside of the slip ring through the air compressor system to keep the internal pressure higher than the external pressure, thereby preventing the invasion of external flammable and explosive dust. However, this technical solution not only requires the additional installation of air compressors, gas tanks, pipelines and their control systems, but also occupies a large area and has complex pipeline layout. It also greatly increases the investment cost and maintenance difficulty of the system, making it extremely inconvenient to use. On the other hand, there are also some explosion-proof slip rings on the market that do not require positive pressure explosion-proof form, but the rated current of these products is often small, and can only meet the power supply requirements of several amperes to tens of amperes, which is far from meeting the high-power and high-reliability operation requirements of stackers and reclaimers in coal yards. Summary of the invention

[0004] The purpose of the present invention is to provide a slip ring explosion-proof structure in order to solve at least one of the above technical problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] A slip ring explosion-proof structure comprises a slip ring and an explosion-proof housing arranged outside the slip ring; a connecting mechanism is arranged at the connection between the explosion-proof housing and a junction box; an alarm mechanism is arranged on the connecting mechanism, and the alarm mechanism is used to monitor the gap value between the joint surfaces of the connecting mechanism. When the gap value does not meet the preset condition, the alarm mechanism issues a safety alarm.

[0007] Furthermore, the connection mechanism includes: a first connection surface and a second connection surface; the gap value between the first connection surface and the second connection surface complies with the GB12476.5-2013 standard.

[0008] Further, the alarm mechanism includes: a sensor, a sensor cable, a sensor control box, and an audible and visual alarm;

[0009] The sensor is used to monitor the gap between the first connection surface and the second connection surface; the sensor is connected to the sensor control box through the sensor cable;

[0010] The sensor control box controls the sound and light alarm to issue a safety alarm according to the data monitored by the sensor.

[0011] Furthermore, the sensor is arranged on the first connecting surface; and the sound and light alarm is arranged in a conspicuous position.

[0012] Furthermore, the gap value is greater than a first threshold value, and the first threshold value is determined according to GB12476.5-2013 standard.

[0013] Further, when the gap value is greater than a second threshold value and lasts for a preset time, the alarm mechanism not only issues a safety alarm, but also sends an alarm signal to a controller of an upstream power supply system, and the controller performs upstream power cut-off of the slip ring explosion-proof structure;

[0014] The second threshold is determined according to GB12476.5-2013 standard, and the second threshold is greater than the first threshold.

[0015] The beneficial effects of the present invention are:

[0016] The present invention effectively improves the explosion-proof safety of the slip ring by adopting a flameproof housing combined with an intelligent alarm mechanism: the flameproof housing meets the national standard requirements for flameproof performance and explosion-resistant performance. When the explosive mixture in the environment invades the interior of the slip ring, no matter what the cause of the explosion is, the internal explosion will not cause the detonation point to cause the explosion of external flammable and explosive objects through the housing; the alarm mechanism of the present invention monitors and warns of abnormal gaps in the connecting mechanism in real time, promptly prevents safety hazards caused by excessive gaps, and automatically cuts off upstream power supply in extreme cases to ensure the safety and stability of the coal yard operating environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a slip ring explosion-proof structure according to an embodiment of the present invention;

[0018] Figure 2 This is a partial schematic diagram of a connecting mechanism according to an embodiment of the present invention. DETAILED DESCRIPTION

[0019] The content of the present invention will now be discussed with reference to exemplary embodiments. It should be understood that the embodiments discussed are only to enable those skilled in the art to better understand and thus implement the content of the present invention, rather than implying any limitation on the scope of the present invention.

[0020] As used herein, the term “including” and variations thereof are to be interpreted as open-ended terms meaning “including, but not limited to.” The term “based on” is to be interpreted as “based, at least in part, on.” The terms “one embodiment” and “an embodiment” are to be interpreted as “at least one embodiment.”

[0021] Figure 1 FIG. 1 is a schematic diagram of the overall structure of a slip ring explosion-proof structure according to an embodiment of the present invention. Figure 1 As shown, according to an embodiment of the present invention, a slip ring explosion-proof structure includes a slip ring 1, and an explosion-proof housing 2 arranged outside the slip ring 1; a connecting mechanism 4 is arranged at the connection between the explosion-proof housing 2 and the junction box 3; an alarm mechanism 5 is arranged on the connecting mechanism 4, and the alarm mechanism 5 is used to monitor the gap value between the joint surfaces of the connecting mechanism 4. When the gap value does not meet the preset conditions, the alarm mechanism 5 issues a safety alarm.

[0022] In this embodiment, an explosion-proof housing 2 is provided outside the slip ring 1. The junction box 3 of the slip ring 1 and the base may cause air or sparks to flow inside and outside. In order to avoid this problem, a connecting mechanism 4 is provided at the connection between the explosion-proof housing 2 and the junction box 3; an alarm mechanism 5 is provided on the connecting mechanism 4. The alarm mechanism 5 monitors the gap value between the joint surfaces of the connecting mechanism 4 in real time. When the gap value does not meet the preset conditions, the alarm mechanism 5 issues a safety alarm. In order to further improve the sealing of the explosion-proof structure of the slip ring, grease is filled at the junction of the rotating shaft and the explosion-proof housing 2 (bearing seal) to prevent dust from entering.

[0023] The explosion-proof structure of the slip ring tightly wraps the slip ring 1 through the explosion-proof housing 2, forming a physical barrier to isolate the potential explosive environment. At the key connection between the explosion-proof housing 2 and the junction box 3, a special connection mechanism 4 is designed, which not only ensures the stability of the structure, but also realizes real-time monitoring of the gap between the joint surfaces of the connection through the built-in alarm mechanism 5. The alarm mechanism 5 uses precision sensors to continuously measure and compare the gap value with the preset safety threshold. Once the gap value is detected to be beyond the safety range, it indicates that the connection may be loose or the sealing is damaged. At this time, the alarm mechanism 5 immediately triggers a safety alarm to remind the operator to check and repair in time, thereby effectively preventing the circulation of air or sparks caused by poor connection and ensuring the explosion-proof performance of the overall system.

[0024] The present invention significantly improves the safety and reliability of the slip ring explosion-proof structure; the connection mechanism ensures the tight connection between the explosion-proof housing and the junction box, and the alarm mechanism realizes the intelligent monitoring of the joint surface gap, which can quickly issue an alarm when the gap is abnormal, providing timely safety warnings for operators. The present invention not only effectively prevents the circulation of air or sparks in and out of the explosion-proof area, but also reduces the safety risks caused by loose connections, which is of great significance for improving the operating stability and safety of industrial equipment in explosive environments.

[0025] Figure 2 FIG. 1 is a partial schematic diagram of a connection mechanism in accordance with an embodiment of the present invention. Figure 2 As shown, according to an embodiment of the present invention, the connection mechanism 4 includes: a first connection surface 41 and a second connection surface 42; the gap value between the first connection surface 41 and the second connection surface 42 complies with the GB12476.5-2013 standard.

[0026] In this embodiment, the connection mechanism 4 includes a first connection surface 41 and a second connection surface 42; the gap value between the first connection surface 41 and the second connection surface 42 complies with the GB12476.5-2013 standard. For specific standards, refer to Table 1.

[0027]

[0028] Table 1

[0029] In this embodiment, the connection mechanism 4 is formed by the first connection surface 41 and the second connection surface 42 being closely matched, and the gap value between the two strictly complies with the GB12476.5-2013 standard, ensuring the high sealing and stability between the explosion-proof housing 2 and the junction box 3. According to the specific standards shown in Table 1, the minimum width W of the joint surface varies from 5mm to 22mm, and the corresponding maximum allowable gap G is adjusted according to the width change, ensuring that the best sealing effect can be achieved at different widths. In particular, when the width of the joint surface is greater than 5mm, the allowable gap value increases by 0.01mm for every increase of 1mm. This flexible adjustment mechanism not only ensures the tightness of the connection, but also takes into account the diversity of practical applications.

[0030] The present invention realizes high-precision and high-reliability connection in the slip ring explosion-proof structure by adopting a connection mechanism that complies with the GB12476.5-2013 standard; the gap value between the first connection surface and the second connection surface is accurately controlled within a safe range, effectively preventing the penetration of air or sparks, thereby greatly improving the safety of the entire explosion-proof system. In addition, this design also fully considers the impact of changes in the width of the joint surface on the gap value, and ensures the best sealing effect under different working conditions through a flexible adjustment mechanism.

[0031] According to one embodiment of the present invention, the alarm mechanism 5 includes: a sensor 51, a sensor cable 52, a sensor control box 53, and an audible and visual alarm 54;

[0032] The sensor 51 is used to monitor the gap between the first connection surface 41 and the second connection surface 42; the sensor 51 is connected to the sensor control box 53 through the sensor cable 52;

[0033] The sensor control box 53 controls the sound and light alarm 54 to sound a safety alarm according to the data monitored by the sensor 51.

[0034] Preferably, the sensor 51 is disposed on the first connecting surface 41; and the sound and light alarm 54 is disposed at a conspicuous position.

[0035] In this embodiment, the design of the alarm mechanism 5 further enhances the safety of the connecting mechanism 4. The alarm mechanism 5 includes: a sensor 51, a sensor cable 52, a sensor control box 53, and an audible and visual alarm 54; the sensor 51 adopts a laser rangefinder sensor, which is buried and installed on the first connecting surface 41, and exists like a "sentinel", always monitoring the gap changes between the second connecting surface 42. This key data is accurately transmitted to the sensor control box 53 through the sensor cable 52, and the latter, like a "commander", quickly makes judgments based on the received data. Once the gap value exceeds the preset safety range, the sensor control box 53 will immediately trigger the audible and visual alarm 54, and send out a striking audible and visual signal to remind the operator to pay attention and take corresponding measures. The audible and visual alarm 54 is deliberately set in a conspicuous position to ensure that the alarm signal can be quickly detected, thereby ensuring the safety of the connecting mechanism 4 and the entire system at the first time.

[0036] The present invention realizes real-time monitoring and intelligent alarm of the gap status of the connecting mechanism, which not only improves the safety of the system, but also greatly simplifies the process of troubleshooting and handling; once the connecting mechanism becomes loose or the gap is abnormal, the alarm mechanism can respond immediately and quickly attract attention through sound and light dual signals, thereby effectively avoiding potential safety risks; the precise monitoring of the sensor is combined with the intelligent judgment of the sensor control box to ensure the accuracy and reliability of the alarm signal, providing a more solid guarantee for the safe operation of industrial equipment in complex environments.

[0037] According to an implementation manner of the present invention, the preset condition is: the gap value is greater than a first threshold value, and the first threshold value is determined according to the GB12476.5-2013 standard.

[0038] Preferably, when the gap value is greater than the second threshold value and lasts for a preset period of time, the alarm mechanism 5 not only issues a safety alarm, but also sends an alarm signal to the controller of the upstream power supply system, and the controller cuts off the upstream power supply of the slip ring explosion-proof structure;

[0039] The second threshold is determined according to GB12476.5-2013 standard, and the second threshold is greater than the first threshold.

[0040] In this embodiment, the first threshold value strictly set according to the GB12476.5-2013 standard is used as a benchmark for judging whether the gap of the connecting mechanism 4 is normal. When the sensor 51 detects that the gap value exceeds the first threshold value, the alarm mechanism 5 will immediately start the sound and light alarm 54 to issue a preliminary safety alarm to attract the attention of the operator. When the gap value further deteriorates, exceeds the second threshold value of a higher level and continues for a preset time (the second threshold value is also set based on the GB12476.5-2013 standard and is higher than the first threshold value), the alarm mechanism 5 will not only continue to issue sound and light alarms, but also send an emergency alarm signal to the controller of the upstream power supply system through a specific communication method. The preset time length is set according to the actual engineering requirements. In this real-time mode, the preset time length is 10s. The controller that receives the emergency alarm signal will respond quickly and perform upstream power-off processing on the slip ring explosion-proof structure to completely cut off potential safety hazards and prevent the situation from further deteriorating.

[0041] The present invention significantly improves the safety protection level of the connection mechanism and the entire system by introducing a dual-threshold alarm mechanism based on the GB12476.5-2013 standard; the primary safety alarm can promptly remind the operator to pay attention to and deal with abnormal situations, while the high-level power-off protection measures can quickly cut off the risk source in extreme cases, effectively preventing safety accidents that may be caused by excessive gaps in the connection mechanism. The present invention not only enhances the stability and reliability of the system, but also greatly reduces maintenance costs and downtime, providing a strong guarantee for the continuous and safe operation of industrial equipment.

[0042] The present invention effectively improves the operating safety of industrial equipment in explosive environments by designing a high-precision, high-reliability slip ring explosion-proof structure. Through a connection mechanism that complies with the GB12476.5-2013 standard and a real-time monitoring alarm mechanism, the present invention achieves precise control of the gap of the connection mechanism and intelligent alarm; when the gap is abnormal, it can not only issue a safety alarm in time, but also automatically cut off the upstream power supply in extreme cases to prevent the situation from deteriorating. The present invention simplifies the system structure through explosion-proofing, reduces production and operation costs, and provides comprehensive protection for the continuous and safe operation of industrial equipment.

[0043] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

[0044] It should be understood that the size of the serial numbers of each step in the content of the invention and the embodiments of the present invention does not absolutely mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

Claims

1. A slip ring explosion-proof structure, comprising a slip ring (1), characterized in that: Also includes: An explosion-proof housing (2) is arranged outside the slip ring (1); a connection mechanism (4) is arranged at the connection between the explosion-proof housing (2) and the junction box (3); an alarm mechanism (5) is arranged on the connection mechanism (4), and the alarm mechanism (5) is used to monitor the gap value between the joint surfaces of the connection mechanism (4); when the gap value does not meet a preset condition, the alarm mechanism (5) issues a safety alarm.

2. The slip ring explosion-proof structure according to claim 1, characterized in that: The connection mechanism (4) comprises: a first connection surface (41) and a second connection surface (42); the gap value between the first connection surface (41) and the second connection surface (42) complies with the GB12476.5-2013 standard.

3. The slip ring explosion-proof structure according to claim 2, characterized in that: The alarm mechanism (5) comprises: a sensor (51), a sensor cable (52), a sensor control box (53), and an audible and visual alarm (54); The sensor (51) is used to monitor the gap between the first connection surface (41) and the second connection surface (42); the sensor (51) is connected to the sensor control box (53) via the sensor cable (52); The sensor control box (53) controls the sound and light alarm (54) to issue a safety alarm according to the data monitored by the sensor (51).

4. The slip ring explosion-proof structure according to claim 3, characterized in that: The sensor (51) is arranged on the first connecting surface (41); and the sound and light alarm (54) is arranged at a conspicuous position.

5. The slip ring explosion-proof structure according to claim 1, characterized in that: The preset condition is that the gap value is greater than a first threshold value, and the first threshold value is determined according to the GB12476.5-2013 standard.

6. The slip ring explosion-proof structure according to claim 5, characterized in that: When the gap value is greater than a second threshold value and lasts for a preset time, the alarm mechanism (5) not only issues a safety alarm, but also sends an alarm signal to a controller of an upstream power supply system, and the controller cuts off the upstream power supply of the slip ring explosion-proof structure; The second threshold is determined according to GB12476.5-2013 standard, and the second threshold is greater than the first threshold.

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