Steel belt deviation monitoring and automatic alarm system

Abstract

The invention discloses a steel belt deviation monitoring and automatic alarm system which comprises a deviation monitoring device and an alarm device. The deviation monitoring devices are arranged on the two sides of a conveying steel belt respectively and comprise limiting wheels and proximity switches. The limiting wheel is arranged on the side edge of the conveying steel belt and spaced from the conveying steel belt by a certain distance, the limiting wheel is driven to rotate, the wheel face of the limiting wheel corresponds to the side edge of the conveying steel belt, and when the conveying steel belt deviates to make contact with the wheel face of the limiting wheel, the limiting wheel is driven to rotate. The proximity switch is arranged on one side of the wheel surface of the limiting wheel; a plurality of grooves are formed in the positions, corresponding to the proximity switches, of the wheel face of the limiting wheel, the grooves are evenly formed in the circumferential direction of the wheel face at intervals to form a periodic signal triggering face, when the limiting wheel rotates, the proximity switches periodically detect the wheel face and the grooves, the frequency of the proximity switches is in positive correlation with the running speed of the conveying steel belt, and triggering deviation is judged through a threshold value. According to the invention, unmanned intelligent monitoring can be realized, the uncertainty of manual inspection is reduced, and the deviation fault discovery time is greatly shortened.

Description

Technical Field

[0001] The present invention relates to the field of intelligent monitoring, and specifically to a steel strip deviation monitoring and automatic alarm system. Background Art

[0002] The steel belt dry slag conveyor in coal-fired power plants uses a roller drive. The conveyor belt is prone to deviation when the roller rotates. Currently, steel belt dry slag conveyors generally lack steel belt deviation monitoring and automatic alarm systems. Regular manual observation of the steel belt position is required, which is prone to missed detection and cannot provide real-time warnings. At the same time, the degree of deviation relies on experience and lacks objective data support. Once the steel belt deviates seriously, it may cause a shutdown accident, affecting the continuous operation of the power plant. Summary of the Invention

[0003] Purpose of the invention: The present invention provides a steel strip deviation monitoring and automatic alarm system, which can realize unmanned intelligent monitoring, reduce the uncertainty of manual inspection, and greatly shorten the time of discovering deviation faults.

[0004] Technical solution: The steel strip deviation monitoring and automatic alarm system provided by the present invention includes a deviation monitoring device and an alarm device.

[0005] The deviation monitoring device is respectively arranged on both sides of the conveyor belt, and includes: a limit wheel and a proximity switch; The limiting wheel is arranged on the side of the conveyor steel belt and is spaced a certain distance therefrom. The limiting wheel is passively rotated, and its wheel surface corresponds to the side of the conveyor steel belt. When the conveyor steel belt deviates and contacts the wheel surface of the limiting wheel, the limiting wheel is driven to rotate; The proximity switch is arranged on one side of the limit wheel surface; The wheel surface of the limit wheel is provided with grooves corresponding to the position of the proximity switch. The grooves are evenly spaced around the wheel surface to form a periodic signal triggering surface. When the limit wheel rotates, the proximity switch periodically detects the wheel surface and the grooves. The frequency is positively correlated with the running speed of the conveyor steel belt, and the deviation is triggered by the threshold value. The deviation monitoring device is connected to the alarm device and triggers an alarm after determining that the vehicle is deviation.

[0006] Furthermore, the deviation monitoring device is provided in multiple groups on both sides of the head, both sides of the tail and both sides of the middle of the conveyor steel belt.

[0007] Furthermore, a rotating shaft is fixed to the casing of the steel belt machine where the conveyor steel belt is located, and the limit switch is arranged on the rotating shaft through a bearing.

[0008] Furthermore, the proximity switch is an inductive proximity switch, and the limiting wheel is a metal wheel.

[0009] Furthermore, the proximity switch is connected to a DCS system, and further connected to an alarm device.

[0010] Beneficial effects: Compared with the prior art, the present invention: 1. Realize unmanned intelligent monitoring, reduce the uncertainty of manual inspections, and greatly shorten the time to discover deviation faults; 2. The number of grooves on the multi-equally divided groove limit wheel directly affects the frequency accuracy of the pulse signal, which is the physical basis of quantitative detection. It forms a periodic signal trigger surface, improves monitoring accuracy, and reduces the degree of false alarms; 3. Use non-contact inductive proximity switch, which is only suitable for metal materials to avoid dust and coal slag impurities in the groove affecting the detection accuracy; 4. Limiting wheels are set at multiple locations of the head, transition section, and tail to cover the entire path of the steel belt deviation area and accurately detect the deviation location area. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a top view of the entire invention; Figure 2 It is a side sectional view of the present invention. DETAILED DESCRIPTION

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] like Figure 1 and 2 The steel strip deviation monitoring and automatic alarm system comprises a deviation monitoring device and an alarm device. The deviation monitoring device is connected to the alarm device and triggers an alarm after determining that the steel strip has deviated.

[0014] The deviation monitoring device is set on both sides of the conveyor steel belt 1, and multiple groups are set on both sides of the head, tail and middle of the conveyor steel belt 1, that is, covering the deviation area of ​​the head, tail and transition section of the steel belt transmission.

[0015] Each deviation monitoring device includes: a limiting wheel 2 and a proximity switch 3.

[0016] A rotating shaft 5 is fixed to the casing of the steel belt machine where the conveyor steel belt 1 is located. The limiting wheel 2 is arranged on the rotating shaft 5 through a bearing 6. The limiting wheel 2 is located on the side of the conveyor steel belt 1 and is spaced a certain distance from it. Its wheel surface corresponds to the side of the conveyor steel belt 1. The rotation of the limiting wheel 2 is passive rotation. When the conveyor steel belt 1 deviates and contacts the wheel surface of the limiting wheel 2, it drives the limiting wheel 2 to rotate.

[0017] The proximity switch 3 is arranged on one side of the wheel surface of the limiting wheel 2, its position is fixed, and detects the distance between it and the wheel surface of the limiting wheel.

[0018] The wheel surface of the limiting wheel 2 is provided with a groove 4 corresponding to the position of the proximity switch 3. The grooves 4 are arranged at uniform intervals around the wheel surface to form a periodic signal triggering surface. In this embodiment, three grooves 4 are arranged at regular intervals around the wheel surface, with a groove width of 22±0.5mm and a depth of 10±0.3mm. The proximity switch and the non-groove area of ​​the limit wheel 2 should maintain a distance of 7±1mm.

[0019] When the limit wheel 2 rotates, the proximity switch 3 periodically detects the wheel surface and the groove 4. That is, by setting the sensing distance of the proximity switch 3 to distinguish the groove 4 from the actual wheel surface, a square wave pulse is generated (the frequency is positively correlated with the running speed of the steel belt when it deviates).

[0020] In order to prevent the dust and coal slag impurities in the groove from affecting the detection accuracy, the proximity switch adopts a non-contact inductive proximity switch, and the limiting wheel 2 is a metal wheel.

[0021] The pulse signal of the proximity switch is connected to the DCS system through electrical connection and the pulse frequency is calculated in real time. When the frequency of any monitoring point reaches the set value, it is determined to be deviation, triggering an alarm, locating the fault section, and entering the subsequent steel belt machine fault chain mechanism.

Claims

1. A steel strip deviation monitoring and automatic alarm system, characterized in that: Including deviation monitoring device and alarm device; The deviation monitoring device is respectively arranged on both sides of the conveyor steel belt (1), and comprises: a limiting wheel (2) and a proximity switch (3); The limiting wheel (2) is arranged on the side of the conveying steel belt (1) and is spaced a certain distance therefrom. The limiting wheel (2) is passively rotated, and its wheel surface corresponds to the side of the conveying steel belt (1). When the conveying steel belt (1) deviates and contacts the wheel surface of the limiting wheel (2), the limiting wheel (2) is driven to rotate. The proximity switch (3) is arranged on one side of the wheel surface of the limiting wheel (2); The wheel surface of the limiting wheel (2) is provided with a groove (4) corresponding to the position of the proximity switch (3), and a plurality of grooves (4) are evenly spaced around the wheel surface to form a periodic signal triggering surface. When the limiting wheel (2) rotates, the proximity switch (3) periodically detects the wheel surface and the groove (4), and the frequency thereof is positively correlated with the running speed of the conveyor steel belt (1), and the deviation is triggered by the threshold value. The deviation monitoring device is connected to the alarm device and triggers an alarm after determining that the vehicle is deviation.

2. The steel strip deviation monitoring and automatic alarm system according to claim 1 is characterized in that: The deviation monitoring devices are arranged in multiple groups on both sides of the head, both sides of the tail and both sides of the middle transition section of the conveyor steel belt (1).

3. The steel strip deviation monitoring and automatic alarm system according to claim 1 is characterized in that: A rotating shaft (5) is fixed to the housing of the steel belt machine where the conveying steel belt (1) is located, and the limiting wheel (2) is arranged on the rotating shaft (5) via a bearing (6).

4. The steel strip deviation monitoring and automatic alarm system according to claim 1 is characterized in that: The proximity switch is an inductive proximity switch, and the limiting wheel (2) is a metal wheel.

5. The steel strip deviation monitoring and automatic alarm system according to claim 1 is characterized in that: The proximity switch is connected to the DCS system and further connected to the alarm device.

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