Safety isolation protection system for mine belt conveyor
By designing a safety isolation and protection system for mine belt conveyors, an infrared grating group and a PLC control unit are used to realize the automatic detection and control of belt conveyors. This solves the problems of high cost, easy corrosion and inconvenient detection of existing protective devices, and achieves efficient safety isolation and simplified maintenance process.
Patent Information
- Application Number
- CN202520285730.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2025-12-16
- Estimated Expiration
- 2035-02-21
AI Technical Summary
In the existing technology, the safety protection device for mining belt conveyors cannot effectively solve the problems of high investment cost, inconvenient installation and disassembly, easy corrosion, inconvenient protection effectiveness testing, short service life in corrosive environments, and inability to integrate the safety isolation and protection device into the belt conveyor control system during the installation and disassembly process.
A safety isolation and protection system for mine belt conveyors is designed using optoelectronic and electrical technologies. It includes a transformer, a power module, a safety protection unit, and an audible and visual display and alarm unit. Multiple infrared grating groups are used for closed detection to effectively isolate and protect unsafe areas on both sides of the belt conveyor. Automatic detection and control are achieved through a PLC control unit, replacing the traditional steel protective fence.
It enables real-time detection and automatic control of unsafe areas of belt conveyors, reducing the labor intensity of workers, saving investment costs, simplifying maintenance procedures, improving work efficiency, and having a long service life in corrosive environments.
Smart Images
Figure CN223673605U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of mine belt conveyor safety isolation protection, and particularly relates to a mine belt conveyor safety isolation protection system. BACKGROUND
[0002] According to the requirements of current safety management and relevant norms, the two sides of the belt conveyor conveying ore, sand, waste rock and the like of a mine must be provided with protective isolation nets, so as to prevent personnel from entering the non-safety area of the belt conveyor during the operation of the belt conveyor and causing personnel injury accidents. The currently adopted protective isolation mode is to install metal material protective nets on the two sides of the belt conveyor. The basic technical requirements of the protective nets are as follows: 1. The protective net frame is made of ∟30 angle steel; 2. The protective net is made of Ø2.5mm steel wire mesh, and the mesh is 10×10mm; 3. The length of the protective net is designed to be 1000-1500mm, so as to facilitate the disassembly and cleaning of the accumulated matters on the ground below the belt conveyor during maintenance; 4. The upper two sides of the protective net take the upper surface of the belt conveyor frame as the reference surface, and the height is designed to be 200mm higher than the upper edge of the belt conveyor; the lower two sides of the protective net take the lower surface of the belt conveyor frame as the reference surface, and the height is designed to be 200mm higher than the lower edge of the return belt of the belt conveyor. The metal material protective isolation net has the shortcomings of high investment cost, inconvenient installation and disassembly, easy rust, inconvenient detection of protective effectiveness, short service life in corrosive environment, and the like. CONTENT OF THE UTILITY MODEL
[0003] The utility model aims at providing a mine belt conveyor safety isolation protection system, so as to solve the problems of high investment cost, inconvenient installation and disassembly, easy rust, inconvenient detection of protective effectiveness, short service life in corrosive environment, and the like of the existing belt conveyor protective isolation net, and the problem that the safety isolation protection device cannot be incorporated into the control system of the belt conveyor. Through the design of photoelectric technology and electrical technology, a protective isolation system which can reliably and effectively isolate and protect the non-safety area of the belt conveyor, overcome the above-mentioned shortcomings, and electrically detect the effectiveness is provided.
[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a mine belt conveyor safety isolation protection system, comprising a transformer, a power module, a safety protection unit, and an audible and visual display and alarm unit.
[0005] The transformer is connected in parallel with the power module, the sound and light display and alarm unit, a belt conveyor PLC control unit is connected in parallel between the transformer and the power module, a safety protection unit is arranged between the belt conveyor PLC control unit and the power module, a first intermediate relay and its one-to-one corresponding first auxiliary contact are connected between the safety protection unit and the belt conveyor PLC control unit, and a second intermediate relay and its one-to-one corresponding second auxiliary contact are connected between the sound and light display and alarm unit input end and the belt conveyor PLC control unit.
[0006] Further, the safety protection unit comprises a plurality of infrared grating groups.
[0007] Further, the sound and light display and alarm unit comprises a plurality of alarm signal lamps and at least one electric siren.
[0008] The system fully utilizes the safety protection unit composed of a plurality of infrared grating groups, can detect the characteristics of the closed area, and arranges a plurality of infrared grating groups on both sides of the belt conveyor for closed isolation protection.
[0009] When the belt conveyor control is in the maintenance state, the PLC control system processes all infrared grating groups on both sides of the belt conveyor through software "open circuit", the control system automatically releases the sound and light alarm function in the maintenance mode, and the maintenance personnel can enter the safety isolation area of the belt conveyor for equipment maintenance, repair and cleaning.
[0010] The utility model adopts electrical technology, automatic detection and control technology to design, not only realizes the on-line protection detection of the safety warning area on both sides of the belt conveyor, but also replaces the original steel protective fence with the new system, saves the investment cost, simplifies the maintenance operation process, reduces the labor intensity of workers and improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 The utility model discloses a system connection schematic diagram.
[0012] In the figure: 1 - transformer; 2 - belt conveyor PLC control unit; 3 - power module; 4 - infrared grating group; Hn - alarm signal lamp; SPK1 - electric siren; K1 - first intermediate relay; K2 - second intermediate relay; K11 - first auxiliary contact; K21 - second auxiliary contact. DETAILED DESCRIPTION
[0013] The structure and monitoring mode of the present application will be further described below in combination with specific embodiments and their accompanying drawings, but the implementation mode of the present application is not limited thereto.
[0014] A mine belt conveyor safety isolation protection system, comprising a transformer 1, a power module 3, a safety protection unit and an audible and visual display and alarm unit; the transformer 1 is connected in parallel with the power module 3 and the audible and visual display and alarm unit in sequence, a belt conveyor PLC control unit 2 is connected in parallel between the transformer 1 and the power module 3, the safety protection unit is arranged between the belt conveyor PLC control unit 2 and the power module 3, a first intermediate relay K1 and its one-to-one corresponding first auxiliary contact K11 are connected between the safety protection unit and the belt conveyor PLC control unit 2, and a second intermediate relay K2 and its one-to-one corresponding second auxiliary contact K21 are connected between the two sides of the input end of the audible and visual display and alarm unit and the belt conveyor PLC control unit 2. The safety protection unit comprises a plurality of infrared grating groups 4. The audible and visual display and alarm unit comprises a plurality of alarm signal lamps Hn and at least one electric siren SPK1.
[0015] REFERENCE Figure 1 The working principle and working process of the present application are further described.
[0016] The transformer 1 and the power module 3 are used for providing AC 220V and DC 24V power supply for the belt conveyor PLC control unit 2, the safety protection unit and the sound and light display and alarm unit, the transformer 1 changes AC 380V at the input end of the well into AC 220V at the output end, and provides working power supply for the belt conveyor control system; the belt conveyor PLC control unit 2 and the input and output ports thereof, the first intermediate relay K1 and the second intermediate relay K2 and the input end of the power module 3 are electrically connected with the output end of the transformer 1 through a miniature circuit breaker and a cable; the power module 3 rectifies the input AC 220V to DC 24V, and provides DC 24V working power supply for the safety protection system infrared grating group 4 through a cable; the safety protection unit is composed of a plurality of infrared grating groups 4, is used for closing, isolating and protecting the non-safety area on both sides of the belt conveyor, and sends a detection signal to the belt conveyor PLC control unit 2, each receiving end and the transmitting end are respectively installed on both sides of the bracket of the infrared grating group 4, the bracket is installed in parallel, the interval is 10m, the grating isolation protection height is 1.4m, and the light emitting direction of the infrared grating group 4 is parallel to the running direction of the belt conveyor; the PLC digital quantity input and output ports in the belt conveyor PLC control unit 2 are respectively electrically connected with the first intermediate relay K1 and the second intermediate relay K2 and the one-to-one corresponding first auxiliary contact K11 and the second auxiliary contact K21, the coil of the first intermediate relay K1 is electrically connected with the output end normally closed contact of the plurality of infrared grating groups 4 through a cable, is used for collecting the electrical signal of the detection feedback of the infrared grating group 4, the second intermediate relay K2 and the one-to-one corresponding second auxiliary contact K21 are electrically connected with the signal lamp and the alarm of the sound and light display and alarm unit, and are used for providing the action and trigger signal to the sound and light display and alarm unit; the sound and light display and alarm unit is composed of a plurality of signal lamps Hn and at least one electric siren SPK1, is used for providing light signal and sound signal to the belt conveyor operator, and the plurality of signal lamps Hn of the sound and light display and alarm unit are installed on both sides of the belt way or the belt corridor, and correspond to the plurality of infrared grating groups 4 on both sides of the belt conveyor one by one.
[0017] Before the belt conveyor is ready for normal operation, the control system control mode is converted to the “automatic” operation mode, the ZK circuit breaker is closed, the belt control system is powered on, the power module 3 is powered on, the AC 220V voltage is converted into the DC 24V voltage, and the working power supply is provided for the infrared grating group 4. The PLC controller performs self-checking and detection, confirmation, analysis and judgment on various conditions before starting of the feedback of various sensors and detection devices of the control system, but when various conditions are met, the system displays normally, no alarm and fault prompt, and the system waits for a starting instruction to prepare for starting operation.
[0018] When the belt is started and runs normally, if a person or an object intrudes into the safety isolation protection area on both sides of the belt, the infrared grating group 4 in the intrusion area is blocked by the person or the object, the corresponding infrared grating group 4 outputs an action, the corresponding first intermediate relay K1 (any one or more of K1) is powered and attracted, the corresponding first auxiliary contact K11 (any one or more of K11) is closed, and the corresponding DI input point of the PLC is connected and acted. After the PLC detects the action information of the DI input point in real time, the belt conveyor is stopped, the changed input information is judged and analyzed, the area of the action signal is determined, and the corresponding output information is sent according to the analysis result through the DO output point, the second intermediate relay K2 (any one or more of K2) corresponding to the output point is triggered and connected, the corresponding second auxiliary contact K21 (any one or more of K21) is closed, the corresponding alarm signal lamp (any one or more of Hn) is turned on, and the electric siren SPK1 is powered and alarmed, thereby realizing the real-time monitoring and interlocking protection of the safety protection isolation area on both sides of the belt.
[0019] When the belt conveyor is maintained or repaired, the control system is switched to the "maintenance" mode, the PLC control unit of the belt conveyor processes all the infrared grating groups 4 on both sides of the belt conveyor through software, the PLC control system does not analyze and process the detection information of the infrared grating group 4 fed back to the PLC input, the control system automatically releases the sound and light alarm function in the maintenance mode, the system does not trigger the alarm signal lamp (any one or more of Hn) and the electric siren SPK1 to alarm, and the maintenance personnel can enter the safety isolation area of the belt conveyor without removing the steel protective fence to maintain, repair and clean the equipment.
[0020] The above only describes the preferred embodiment of the utility model, and is not limited to the utility model. It should be noted that for ordinary skilled persons in the art, other equivalent modifications and improvements can be made under the technical inspiration provided by the utility model, and the purpose of the utility model can be achieved, and all should be regarded as the protection range of the utility model.
Claims
1. A mine belt conveyor safety isolation guard system, characterized by: The transformer (1), the power module (3), the safety protection unit and the sound and light display and alarm unit are included. The transformer (1) is connected with the power module (3) and the sound and light display and alarm unit in parallel, a belt conveyor PLC control unit (2) is connected between the transformer (1) and the power module (3), the safety protection unit is arranged between the belt conveyor PLC control unit (2) and the power module (3), a first intermediate relay (K1) and a one-to-one corresponding first auxiliary contact (K11) are connected between the safety protection unit and the belt conveyor PLC control unit (2), and a second intermediate relay (K2) and a one-to-one corresponding second auxiliary contact (K21) are connected between the two sides of an input end of the sound and light display and alarm unit and the belt conveyor PLC control unit (2).
2. A mine belt conveyor safety isolation guard system according to claim 1, characterised in that: The safety protection unit includes a plurality of infrared grating groups (4).
3. A mine belt conveyor safety isolation guard system according to claim 1, characterised in that: The sound and light display and alarm unit includes a plurality of alarm signal lamps (Hn) and at least one electric siren (SPK1).