Passive conveyor safety protection system with hot standby function

Abstract

The passive conveyor safety protection system with the hot standby function comprises a positioning type optical fiber host, optical fibers and optical fiber type protection devices, the positioning type optical fiber host is provided with two optical fiber channels, the two optical fiber channels are each internally provided with one optical fiber, and the two optical fibers are connected with the optical fiber type protection devices installed on the two sides of a conveyor respectively. The tail ends of the two optical fibers are welded; when the optical fiber type protection device gives an alarm, the driving optical fiber bends and twists in the optical fiber type protection device. The optical fiber protection device has the advantages that the optical fiber protection device and the optical fiber do not need optical fiber welding or plug connection, and optical fiber laying and optical fiber protection device installation do not conflict with each other; real-time broken fiber detection is carried out, and an alarm signal is output in real time when the fiber is broken; the system has a hot standby function, and can still be used when one path is broken.

Description

Technical Field

[0001] The invention belongs to the technical field of conveyors and relates to a passive conveyor safety protection system with a hot standby function. Background Art

[0002] Belt conveyors, also known as rubber belt conveyors, are widely used in various industries such as household appliances, electronics, electrical appliances, machinery, tobacco, injection molding, post and telecommunications, printing, food, etc., for assembly, testing, debugging, packaging and transportation of objects. At present, the sensors used in the online monitoring system of the comprehensive protection status of belt conveyors are all electrical signal sensors, which require address encoders, repeaters, signal terminals and power supply; The existing patent CN112607361A fiber optic passive conveyor integrated protection system uses a grating sensor. Since the scattering loss of the grating sensor itself is large in the initial state, one optical fiber can connect to about 8-15 grating sensors. In practical applications, multiple optical fibers need to be deployed for segmented collection and a large amount of on-site optical fiber splicing work needs to be performed. The workload is huge and not conducive to subsequent replacement and maintenance, and it is impossible to detect fiber cable break accidents. In the fiber break state, all protections fail, posing a huge safety hazard. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings in the prior art and to propose a passive conveyor safety protection system with a hot standby function.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a passive conveyor safety protection system with hot standby function, including a positioning fiber optic host, an optical fiber and a fiber optic protection device. The positioning fiber optic host is provided with two fiber optic channels, and each of the two fiber optic channels is provided with an optical fiber. The two optical fibers are respectively connected to the fiber optic protection devices installed on both sides of the conveyor, and the tail ends of the two optical fibers are fused; when the fiber optic protection device alarms, the optical fiber is driven to bend and twist inside the fiber optic protection device.

[0005] Furthermore, the optical fiber protection device includes a base, a slide rail, a fixed support column, a slider, an open silicone sheath, an action mechanical arm and a shell. A circle of raised side walls is provided on the front of the base, an opening is provided on one side of the raised side wall, and the open silicone sheath is embedded in the opening. A cavity is formed in the raised side wall, and a hollow slide rail is provided on the base in the cavity, and a slider is provided on the hollow slide rail. The slider includes a column, a disk and a groove. The groove is provided at the upper end of the column, and the disk is provided in the middle section of the column; the column between the groove and the disk is arranged in the hollow slide rail, and the column at the lower end of the disk The optical fiber is connected to the action robot arm through the hollow slide rail and is driven by the action robot arm to move on the hollow slide rail. A fiber optic embedding groove that passes through the front and back is provided in the groove portion. One side of the fiber optic embedding groove is a support surface for the action of the slider, and the other side of the fiber optic embedding groove is a support surface for the reset of the slider. Fixed support columns are provided on both sides of the hollow slide rail, and the shell cover is provided on the raised side wall. The optical fiber enters the cavity through the line inlet on the open silicone sheath and passes through the space between the fixed support column and the raised side wall. The optical fiber is engaged in the fiber optic embedding groove and is driven by the slider to move along the hollow slide rail.

[0006] Furthermore, the optical fiber is in a ring shape in the cavity.

[0007] Furthermore, a hollow slide rail is provided on the base in the cavity.

[0008] Furthermore, a plurality of hollow slide rails are provided on the base in the cavity, each hollow slide rail is provided with a matching slider, and fixed support columns are provided on both sides of each hollow slide rail.

[0009] Furthermore, one optical fiber passes through a plurality of optical fiber protection devices.

[0010] Furthermore, the optical fiber is led out from the outlet of the open silicone sheath.

[0011] Furthermore, the positioning type fiber optic host is connected to an external display unit, and data can be exchanged with a third-party system through a communication interface; the positioning type fiber optic host is provided with an output control unit for outputting corresponding types of alarm actions.

[0012] Furthermore, the optical fiber protection device includes a base, a turntable, a fixed support column, an open silicone sheath, and an actuating mechanical arm. A circle of raised side walls is provided on the front of the base, and open wire outlets are provided on both sides of the raised side walls. The open silicone sheaths are embedded in the open wire outlets, and a cavity is formed in the raised side walls. A turntable is arranged on the base in the cavity, and the back side of the turntable passes through the base and is connected to the actuating mechanical arm and driven to rotate by the actuating mechanical arm. There are two support columns on the turntable that can rotate with the turntable, and fixed support columns fixed to the base are respectively provided on both sides of the turntable.

[0013] The beneficial effects of the present invention are as follows: using a single-mode single fiber, alarm node information collection of up to 50 km and 50,000 nodes can be realized; the fiber-optic protection device and the optical fiber do not require fiber fusion splicing or plug connection; the optical fiber laying and the installation of the fiber-optic protection device do not conflict with each other; real-time fiber break detection, real-time output of alarm signals when the fiber is broken; with hot standby function, the system can continue to be used when one fiber is broken. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the invention.

[0015] Figure 2 It is a schematic diagram of the structure of the optical fiber protection device of Example 1.

[0016] Figure 3 It is a schematic diagram of the working structure of the optical fiber protection device of Example 1.

[0017] Figure 4 It is a schematic diagram of the slider structure of Example 1.

[0018] Figure 5 It is a schematic diagram of the structure of the optical fiber protection device of Example 2.

[0019] Figure 6 Schematic diagram of the working structure of the optical fiber protection device of embodiment 2 1 is a base; 2 is a slide rail; 3 is a fixed support column; 4 is a slider; 5 is an open silicone sheath; 6 is an action robot arm; 7 is an optical fiber; 8 is a positioning optical fiber host; 9 is an optical fiber protection device; 10 is a display unit; 11 is an output control unit; 12 is a communication interface; 51 is an outlet of the open silicone sheath; 41 is a slider action support surface; 42 is a slider reset support surface; 43 is a groove; 44 is a disk body; 45 is a column; 71 is a bending part of the optical fiber; 101 is a support column; 104 is a turntable. DETAILED DESCRIPTION

[0020] The following will be combined with the attached embodiment of the present invention Figure 1-6 , the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Example 1 Reference Figure 1-4 A passive conveyor safety protection system with hot standby function includes a positioning optical fiber host 8, an optical fiber 7 and an optical fiber protection device 9. The positioning optical fiber host 8 is provided with two optical fiber channels, each of which is provided with an optical fiber 7. The two optical fibers 7 are respectively connected to the optical fiber protection devices 9 installed on both sides of the conveyor, and the tail ends of the two optical fibers are fused; when the optical fiber protection device 9 alarms, the optical fiber 7 is driven to bend and twist inside the optical fiber protection device 9.

[0022] A passive conveyor safety protection system with a hot standby function, a cavity is provided on the fiber-optic protection device, openings are provided on both sides of the cavity wall, and an open silicone sheath is provided on the opening. The optical fiber enters the cavity through the line inlet on the open silicone sheath and is connected to the bending and torsion structure. When the fiber-optic protection device 9 alarms, the bending and torsion structure is driven by the action robot arm to bend and twist, thereby driving the optical fiber 7 to bend and twist in the fiber-optic protection device 9.

[0023] A passive conveyor safety protection system with hot standby function, the optical fiber protection device includes a base 1, a slide rail 2, a fixed support column 3, a slider 4, an open silicone sheath 5, an action mechanical arm 6 and a shell, a circle of raised side walls are provided on the front of the base, an opening is provided on one side of the raised side wall, the open silicone sheath is fitted in the opening, a cavity is formed in the raised side wall, a hollow slide rail is provided on the base in the cavity, a slider 4 is provided on the hollow slide rail, the slider includes a column 45, a disc 44 and a groove 43, a groove is provided on the upper end of the column, and a disc is provided in the middle of the column; the column between the groove and the disc is arranged in the hollow The column at the lower end of the disk body passes through the hollow slide rail and is connected to the action mechanical arm and is driven by the action mechanical arm to move on the hollow slide rail. A fiber optic embedding groove that runs through the front and back is provided in the groove. One side of the fiber optic embedding groove is a slider action support surface 41, and the other side of the fiber optic embedding groove is a slider reset support surface 42. Fixed support columns are provided on both sides of the hollow slide rail. The shell cover is provided on the raised side wall. The optical fiber enters the cavity through the line inlet on the open silicone sheath and passes through the space between the fixed support column and the raised side wall. The optical fiber is engaged in the fiber optic embedding groove and is driven by the slider to move along the hollow slide rail. The optical fiber runs through the optical fiber protection device. When the optical fiber protection device does not alarm, the light in the optical fiber passes through the optical fiber protection device with extremely low loss. When the optical fiber protection device alarms, the internal mechanism bends and twists the optical fiber so that the light loss is greater than 2dB when passing through the optical fiber protection device.

[0024] A passive conveyor safety protection system with a hot standby function, wherein the optical fiber is in a ring shape in a cavity.

[0025] A passive conveyor safety protection system with a hot standby function, wherein a plurality of hollow slide rails are arranged on a base in a cavity, each hollow slide rail is equipped with a sliding block, and fixed support columns are arranged on both sides of each hollow slide rail.

[0026] A passive conveyor safety protection system with hot standby function, wherein an optical fiber passes through multiple optical fiber protection devices.

[0027] A passive conveyor safety protection system with a hot standby function, wherein an optical fiber is led out from an outlet 51 of an open silicone sheath.

[0028] A passive conveyor safety protection system with hot standby function. The propagation loss of light in optical fiber is mainly absorption loss and scattering loss. Different bending degrees of optical fiber can change the scattering loss. By accurately collecting the optical fiber scattering loss, specific events can be accurately identified. The propagation time of light particles in the optical fiber can accurately scan the scattering loss at different positions of the entire optical fiber to obtain the required positioning information.

[0029] A passive conveyor safety protection system with hot standby function. The fiber optic protection device also includes a fiber optic pull rope switch, a fiber optic deviation switch, a fiber optic chute blockage detector, a fiber optic material flow detector, a fiber optic slip detector, a fiber optic tear detector, etc. It can monitor and output alarms in real time and accurately locate conveyor safety protection information such as conveyor pull rope alarm, deviation alarm, chute blockage alarm, material flow signal, speed slip alarm, longitudinal tear alarm, etc.

[0030] A passive conveyor safety protection system with a hot standby function. The optical fiber protection device composition does not require on-site optical fiber fusion splicing and can quickly complete the installation and replacement of the optical fiber deformation protection device.

[0031] A passive conveyor safety protection system with a hot standby function, wherein an optical fiber 7 can be integrally wound and fixed in a cavity of a base 1 by an open silicone sheath 5 without cutting, and the optical fiber 7 is led out from a line outlet of the open silicone sheath.

[0032] A passive conveyor safety protection system with a hot standby function, wherein a slide rail 2 is arranged in a cavity of a base 1 at an angle of 0-180 degrees.

[0033] A passive conveyor safety protection system with a hot standby function. When the action robot arm 6 of the optical fiber protection device is activated, the internal mechanical structure controls the slider 4 to make a linear displacement along the slide rail 2. The slider action support surface 41 pushes the optical fiber. At the same time, the optical fiber is resisted by the fixed support column 3. The optical fiber bends at the optical fiber bending point 71. The optical fiber scattering loss at this position increases.

[0034] A passive conveyor safety protection system with hot standby function. When the optical fiber protection device is reset, the internal mechanical structure controls the slider 4 to move to the initial position along the slide rail 2, the slider reset support surface 42 pushes the optical fiber back to the initial position, the optical fiber bending part 71 returns to the original state, and the optical fiber scattering loss at this position returns to the initial state.

[0035] A passive conveyor safety protection system with a hot standby function. When a fiber-optic protection device requires multiple alarm signals, the optical fiber passes through multiple sliders in the fiber-optic protection device.

[0036] A passive conveyor safety protection system with hot standby function, wherein the slider 4, the slide rail 2 and the fixed support column 3 in the optical fiber protection device are arranged in a fixed position as shown in FIG. Figure 2-3 As shown, the fiber optic bending degree of the fiber optic protection device is close when in the alarm state, and the fiber optic scattering loss value has good repeatability. In order to prevent the scattering loss from affecting the detection accuracy of the entire optical fiber, a scattering loss of 2dB is preferably used.

[0037] A passive conveyor safety protection system with hot standby function. The positioning fiber optic host sends out a narrowband light wave each time through the optical fiber cable, receives the optical fiber reflected light wave signal at a fixed period, and automatically generates array signals for the entire optical fiber cable in intervals of about 1 meter after signal noise reduction and demodulation. The array signal is the scattering loss of each interval. The scattering loss of the initial state of all optical fiber protection devices on the entire optical fiber and the scattering loss during alarm are calibrated to locate the installation position and alarm signal type of each optical fiber protection device. The positioning fiber optic host controls the output control unit to output the corresponding type of alarm action according to the alarm type. The external display unit can display the alarm position and alarm path, and data can be shared with a third-party system through the communication interface.

[0038] A passive conveyor safety protection system with hot standby function. The timing starts from the narrowband light wave emitted by the positioning fiber optic host and ends when the light wave can no longer be received after the timeout period. The total length of the fiber optic can be calculated by the two time differences and the propagation speed of light in the fiber optic. Total length = speed × time / 2. If the current total length does not match the calibrated length, the fiber is broken. The positioning fiber optic host controls the output unit to output the corresponding type of alarm action according to the alarm type.

[0039] A passive conveyor safety protection system with hot standby function, with 2 independent fiber channels to connect two optical fibers, the tail ends of the two optical fibers are fused together to form a loop to realize the hot standby function. When a fiber breaks and the two channels are disconnected, the positioning fiber host quickly issues a fiber break alarm and displays the fiber break position through an external display unit. The positioning fiber host automatically reallocates the number of device nodes of the two channels, and can obtain the working information of all optical fiber protection devices through independent scanning of the two channels, and can still ensure the normal operation of the system.

[0040] A passive conveyor safety protection system with hot standby function collects and controls switch alarm information through events of optical loss caused by optical fiber bending deformation.

[0041] Example 2 Reference Figure 5-6A passive conveyor safety protection system with hot standby function includes a positioning optical fiber host 8, an optical fiber 7 and an optical fiber protection device 9. The positioning optical fiber host 8 is provided with two optical fiber channels, each of which is provided with an optical fiber 7. The two optical fibers 7 are respectively connected to the optical fiber protection devices 9 installed on both sides of the conveyor, and the tail ends of the two optical fibers are fused; A passive conveyor safety protection system with a hot standby function, the optical fiber protection device includes a base 1, a turntable 104, a fixed support column 3, an open silicone sheath 5, and an action robot arm 6. A circle of raised side walls is provided on the front of the base, and open wire outlets are provided on both sides of the raised side walls. The open silicone sheaths are embedded in the open wire outlets. A cavity is formed in the raised side walls, and a turntable is arranged on the base in the cavity, the back of which passes through the base and is connected to the action robot arm and driven to rotate by the action robot arm. There are two support columns 101 on the turntable that can rotate with the turntable, and fixed support columns fixed to the base are respectively provided on both sides of the turntable.

[0042] A passive conveyor safety protection system with hot standby function, after the optical fiber enters the cavity, it passes through a fixed support column, a support column, another support column, and another fixed support column in sequence, such as Figure 5 and Figure 6 shown.

[0043] A passive conveyor safety protection system with a hot standby function. After entering a cavity, an optical fiber passes through a gap between a fixed support column and another support column, and a gap between another support column and another fixed support column in sequence.

[0044] A passive conveyor safety protection system with hot standby function, the turntable is connected to the action robot arm through a mechanical structure and driven by the action robot arm to rotate and restore to zero position according to a certain stroke, thereby realizing the bending, twisting and resetting of the optical fiber.

[0045] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A passive conveyor safety protection system with hot standby function, comprising a positioning optical fiber host (8), an optical fiber (7) and an optical fiber protection device (9), characterized in that: The positioning optical fiber host (8) is provided with two optical fiber channels, each of which is provided with an optical fiber (7). The two optical fibers (7) are respectively connected to optical fiber type protection devices (9) installed on both sides of the conveyor, and the tail ends of the two optical fibers (7) are fused; when the optical fiber type protection device (9) alarms, the optical fiber (7) is driven to bend and twist inside the optical fiber type protection device (9).

2. According to claim 1, a passive conveyor safety protection system with hot standby function is characterized in that: The optical fiber protection device (9) comprises a base (1), a slide rail (2), a fixed support column (3), a slider (4), an open silicone sheath (5), an action mechanical arm (6) and a shell. The front of the base (1) is provided with a circle of raised side walls, one side of the raised side wall is provided with an opening, the open silicone sheath (5) is fitted into the opening, a cavity is formed in the raised side wall, a hollowed-out slide rail (2) is provided on the base in the cavity, a slider (4) is provided on the hollowed-out slide rail (2), the slider comprises a column (45), a disk (44) and a groove (43), the upper end of the column (45) is provided with the groove (43), the middle section of the column (45) is provided with the disk (44); the column between the groove (43) and the disk (44) is provided in the hollowed-out The column at the lower end of the disk body (44) passes through the hollow slide rail (2) and is connected to the action mechanical arm (6) and is driven by the action mechanical arm to move on the hollow slide rail (2). A fiber optic embedding groove that passes through the front and back is provided in the groove portion. One side of the fiber optic embedding groove is a slider action support surface (41), and the other side of the fiber optic embedding groove is a slider reset support surface (42). Fixed support columns (3) are provided on both sides of the hollow slide rail (2). The housing cover is provided on the raised side wall. The optical fiber (7) enters the cavity through the line inlet on the open silicone sheath and passes through the space between the fixed support column and the raised side wall. The optical fiber (7) is engaged in the fiber optic embedding groove and is driven by the slider (4) to move along the hollow slide rail (2).

3. The passive conveyor safety protection system with hot standby function according to claim 2 is characterized in that: The optical fiber (7) is in a ring shape in the cavity.

4. The passive conveyor safety protection system with hot standby function according to claim 2 is characterized in that: A hollow slide rail (2) is provided on the base in the cavity.

5. The passive conveyor safety protection system with hot standby function according to claim 2 is characterized in that: A plurality of hollow slide rails (2) are provided on the base in the cavity, each hollow slide rail (2) is equipped with a sliding block (4), and each hollow slide rail (2) is provided with fixed support columns (3) on both sides.

6. The passive conveyor safety protection system with hot standby function according to claim 1 is characterized in that: An optical fiber (7) passes through a plurality of optical fiber protection devices (9).

7. The passive conveyor safety protection system with hot standby function according to claim 2 is characterized in that: The optical fiber (7) is led out from the wire outlet (51) of the open silicone sheath.

8. The passive conveyor safety protection system with hot standby function according to claim 1 is characterized in that: The positioning optical fiber host (8) is externally connected to a display unit (10) and can exchange data with a third-party system via a communication interface (12); the positioning optical fiber host is provided with an output control unit (11) for outputting an alarm action of a corresponding type.

9. The passive conveyor safety protection system with hot standby function according to claim 1, characterized in that: The optical fiber protection device (9) comprises a base (1), a rotating disk (104), a fixed support column (3), an open silicone sheath (5), and an action mechanical arm (6). The front of the base is provided with a circle of raised side walls, and open wire outlets are provided on both sides of the raised side walls. The open silicone sheaths are engaged at the open wire outlets. A cavity is formed in the raised side walls. A rotating disk is arranged on the base in the cavity. The back side of the rotating disk passes through the base and is connected to the action mechanical arm. The rotating disk is driven to rotate by the action mechanical arm. The rotating disk has two support columns (101) that can rotate with the rotating disk. A fixed support column fixed to the base is provided on the outside of each side of the rotating disk.

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