Optical fiber passive material flow switch and belt conveyor

Abstract

The utility model discloses an optical fiber passive material flow switch and a belt conveyor, the optical fiber passive material flow switch comprises a housing, a rotating mechanism and a guide wheel, the housing is internally provided with an optical fiber sensor and a pressing sheet, the rotating mechanism comprises a rotating disc, a rotating shaft and a swing arm, and the outer edge of the rotating disc is provided with an arc-shaped groove; the guide wheel is arranged on the arc-shaped groove and is connected with the other end of the pressing sheet; during use, the other end of the swing arm is connected with the contact plate, the contact plate is suspended above a rubber belt of the belt conveyor, when materials pass through the contact plate, the contact plate is stirred to rotate, the swing arm is driven to swing, the rotating shaft and the rotating disc are driven to rotate, the guide wheel on the arc-shaped groove rolls, the pressing piece is pushed to swing, and therefore the optical fiber sensor is triggered to collect action signals. And outputting a corresponding optical signal. Therefore, according to the optical fiber passive material flow switch, the signal detection of the material flow switch is realized by adopting a mode that the optical fiber is used as a medium to directly transmit the switching signal, and the problems of signal crosstalk, electromagnetic interference, current leakage and the like do not exist.

Description

Technical Field

[0001] The utility model relates to the technical field of belt conveyors, in particular to an optical fiber passive material flow switch and a belt conveyor. Background Art

[0002] At present, the comprehensive protection system of the belt conveyor usually sets up multiple protection switches or multiple sensors on site, and uses the protection switches to detect or monitor the working status of the belt conveyor in real time, such as using a material flow switch to detect the situation of the material being transported on the belt. In order to achieve monitoring, the comprehensive protection system also includes a control system and a communication system. The communication system is electrically connected to each protection switch on site, and the signals collected by each protection switch are uploaded to the control system through the communication system. Since most of the existing protection switches are electrically controlled switches, the electronic devices installed on site, including the protection switches, are easily affected by electromagnetic interference on site and are prone to oxidation, which affects the accuracy of signal acquisition and the reliability of signal transmission, thereby affecting the real-time monitoring of the belt conveyor, especially the failure downtime rate of long-distance belt conveyors. Utility Model Content

[0003] In view of the above-mentioned deficiencies, the technical problem to be solved by the utility model is: to provide a fiber optic passive material flow switch and belt conveyor, which adopts the method of directly transmitting the switch signal through the optical fiber as the medium to realize the material flow signal detection, and there is no signal crosstalk and electromagnetic interference, no fear of lightning strikes, no leakage current, temperature and joint oxidation leading to failure and communication quality problems, and has extremely high lifespan and stability, reliability and weather resistance; no power supply is required on site, and there is no problem of power supply over ultra-long distances.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A fiber optic passive material flow switch comprises a shell, in which a fiber optic sensor and a pressure piece are arranged, one end of the pressure piece is fixed on the fiber optic sensor, and the switch also comprises a rotating mechanism and a guide wheel; the rotating mechanism comprises a turntable, a rotating shaft coaxially arranged with the turntable, and a swing arm connected to one end of the rotating shaft, the rotating shaft is rotatably arranged on the shell, the swing arm is located on the outside of the shell, and an arc groove is arranged on the outer edge of the turntable; the guide wheel is arranged on the arc groove, and the guide wheel is connected to the other end of the pressure piece; the swing arm swings, driving the rotating shaft and the turntable to rotate, so that the guide wheel slides on the arc groove to push the pressure piece to swing, so that the fiber optic sensor detects an action signal and outputs a corresponding light signal.

[0006] Preferably, one end of the pressing sheet is provided with two connecting ear plates which are arranged opposite to each other, and the guide wheel is arranged between the two connecting ear plates.

[0007] Preferably, the shell includes a first shell and a second shell that are snapped together, the first shell and the second shell together form a receiving cavity, and the receiving cavity accommodates the optical fiber sensor, the pressing sheet and the turntable.

[0008] Preferably, a support frame is provided in the first shell, and the optical fiber sensor is provided on the support frame.

[0009] Preferably, a long through hole is provided on the second shell, and the rotating shaft is provided in the long through hole.

[0010] Preferably, the outer end of the rotating shaft is fixedly connected to one end of the swing arm by a screw, and a limiting protrusion is provided on the rotating shaft, and the limiting protrusion is located on the outer side of the long through hole.

[0011] Preferably, the inner end of the rotating shaft fixes the rotating disk via a locking nut and a gasket.

[0012] Preferably, a base is provided at the bottom of the shell.

[0013] A belt conveyor comprises an adhesive belt and a contact plate suspended above the adhesive belt, and also comprises the above-mentioned optical fiber passive material flow switch, wherein the swing arm of the optical fiber passive material flow switch is connected to the contact plate.

[0014] After adopting the above technical solution, the beneficial effects of the utility model are:

[0015] The utility model provides a passive fiber optic material flow switch and a belt conveyor, wherein the passive fiber optic material flow switch comprises a housing, a rotating mechanism and a guide wheel, wherein an optical fiber sensor and a pressing piece are arranged in the housing, wherein one end of the pressing piece is fixed on the optical fiber sensor, wherein the rotating mechanism comprises a turntable, a rotating shaft arranged coaxially with the turntable, and a swing arm connected to one end of the rotating shaft, wherein the rotating shaft is rotatably arranged on the housing, the swing arm is located on the outside of the housing, and an arc groove is arranged on the outer edge of the turntable; the guide wheel is arranged on the arc groove, and the guide wheel is connected to the other end of the pressing piece; when actually used, the other end of the swing arm is connected to the contact plate, and the contact plate is suspended on the adhesive belt of the belt conveyor. When the material on the tape passes through the optical fiber passive material flow switch, the material hits the contact plate, and the contact plate is rotated by the wave, which drives the swing arm to swing, and then drives the shaft and turntable connected to it to rotate. After the turntable rotates, the guide wheel located on the arc groove is connected to one end of the pressing piece, so that it rotates on the arc groove. Because the arc shape of the arc groove is special, it pushes the pressing piece to move radially relative to the turntable, so that the pressing piece swings, and the swing of the pressing piece triggers the optical fiber sensor, so that it detects the action signal and outputs the corresponding optical signal. After the optical signal is input into the optical modem, the material flow signal on the belt conveyor is detected. It can be seen that the optical fiber passive material flow switch of the utility model uses optical fiber as the medium to directly transmit the switch signal to realize the material flow signal detection. There is no signal crosstalk and electromagnetic interference, no fear of lightning strikes, no leakage current, temperature and joint oxygen causing failures and communication quality problems, and has extremely high life and stability, reliability, and weather resistance; no power supply is required on site, and there is no problem of ultra-long distance power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the optical fiber passive material flow switch of the utility model when the second housing is removed;

[0017] Figure 2 This is the front view of the optical fiber passive material flow switch in the utility model;

[0018] Figure 3 This is a front view of the optical fiber passive material flow switch of the utility model when the second housing is removed;

[0019] Figure 4 It is a cross-sectional view of the optical fiber passive material flow switch in the utility model;

[0020] Figure 5 It is a structural schematic diagram of the rotating mechanism and the optical fiber sensor in the utility model;

[0021] Figure 6 This is a structural schematic diagram of the rotating mechanism and the optical fiber sensor in the utility model from another angle;

[0022] Figure 7 It is a structural schematic diagram of the utility model applied to a belt conveyor;

[0023] Figure 8 It is a schematic diagram of the working principle of the optical fiber passive material flow switch in the utility model;

[0024] In the figure: 1-shell, 10-first shell, 11-second shell, 110-long through hole, 2-optical fiber sensor, 20-pressing sheet, 3-rotating mechanism, 30-turntable, 31-rotating shaft, 310-limiting protrusion, 32-swing arm, 33-arc groove, 4-support frame, 5-base, 6-locking nut, 7-guide wheel, 100-optical fiber passive material flow switch, 200-belt conveyor, 201-tape, 300-tape conveying direction, 400-contact plate. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside", and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] like Figures 1 to 6 As shown together, according to an embodiment of the first aspect of the utility model, the fiber optic passive material flow switch includes a housing 1, a rotating mechanism 3 and a guide wheel 7; wherein a fiber optic sensor 2 and a pressing plate 20 are arranged in the housing 1, and one end of the pressing plate 20 is fixed on the fiber optic sensor 2; wherein the rotating mechanism 3 includes a turntable 30, a rotating shaft 31 coaxially arranged with the turntable 30, and a swing arm 32 connected to one end of the rotating shaft 31, the rotating shaft 31 is rotatably arranged on the housing 1, the swing arm 32 is located on the outside of the housing 1, and an arc groove 33 is arranged on the outer edge of the turntable 30; wherein the guide wheel 7 is arranged on the arc groove 33, and the guide wheel 7 is connected to the other end of the pressing plate 20.

[0029] When the material pushes the swing arm 32 to swing, the swing arm 32 is connected to the shaft 31, so that it drives the shaft 31 to rotate, and the shaft 31 can rotate in both directions. After the shaft 31 rotates, it drives the turntable 30 connected thereto to rotate. After the turntable 30 rotates, the arc groove 33 thereon also rotates, causing the guide wheel 7 on the arc groove 33 to roll. Since the arc groove 33 provides an arc path for the guide wheel 7, the rolling of the guide wheel 7 is converted into the up and down movement of the swing arm 32, and the swing of the pressing sheet 20 triggers the optical fiber sensor 2, so that it collects the action signal and then outputs the corresponding optical signal. After the optical signal is input into the optical modem, the corresponding material flow signal is output, wherein the optical modem is connected to the optical fiber passive material flow switch of the utility model through an optical fiber. It can be seen that the fiber optic passive material flow switch of the utility model uses optical fiber as the medium to directly transmit the switch signal to realize material flow signal detection. There is no signal crosstalk and electromagnetic interference, no fear of lightning strikes, no leakage current, temperature and joint oxygen causing failures and communication quality problems, and has extremely high lifespan and stability, reliability, and weather resistance. No power supply is required on site, and there is no problem of ultra-long distance power supply.

[0030] That is, the fiber optic passive material flow switch of the utility model directly uses optical fiber and grating to map the mechanical action signal into an optical signal, directly uses optical fiber transmission, and can connect multiple signals in series and distinguish them in one optical fiber, which completely overcomes the shortcomings of electronic signal material flow switches in engineering applications and is particularly suitable for material flow detection and control of long-distance belt conveyors.

[0031] like Figure 1 , Figure 3 and Figure 5 As shown, in some embodiments of the utility model, two connecting ear plates arranged opposite to each other are arranged at one end of the pressing plate 20, and a guide wheel 7 is arranged between the two connecting ear plates. In a preferred embodiment, the two connecting ear plates are arranged as an integral structure with the pressing plate 20, which improves the structural strength and ensures the service life.

[0032] like Figure 4 As shown, in some embodiments of the present invention, the housing 1 includes a first housing 10 and a second housing 11 that are snapped together, and the first housing 10 and the second housing 11 together form a receiving cavity, and the receiving cavity accommodates the optical fiber sensor 2, the pressing piece 20 and the turntable 30.

[0033] like Figure 1 and Figure 4 As shown, a support frame 4 is provided in the first shell 10, and the optical fiber sensor 2 is provided on the support frame 4. The first shell 10 can be circular, and the support frame 4 can be a circular bracket, which is fixed on the inner wall of the first shell 10, which can not only reliably support the optical fiber sensor 2 and ensure the performance of the optical fiber sensor 2, but also optimize the spatial layout, making the installation and assembly operations convenient.

[0034] like Figure 4 As shown, the second housing 11 is provided with a long through hole 110, and a rotating shaft 31 is arranged in the long through hole 110. Under the constraint of the long through hole 110, the rotating shaft 31 is reliably mounted on the second housing 11 and rotates reliably, thereby improving the reliability of the rotating mechanism 3. In addition, a bearing can be arranged on the second housing 11, and the rotating shaft 31 is directly mounted on the bearing.

[0035] like Figure 4 As shown, the outer end of the rotating shaft 31 is fixedly connected to one end of the swing arm 32 by a screw, and a limiting protrusion 310 is provided on the rotating shaft 31, and the limiting protrusion 310 is located on the outer side of the long through hole 110. Under the action of the limiting protrusion 310, the rotating shaft 31 is reliably installed in the long through hole 110 of the second shell 11; at the same time, the inner end of the rotating shaft 31 fixes the turntable 30 by a locking nut 6 and a gasket.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, a base 5 is provided at the bottom of the housing 1, and the optical fiber passive material flow switch of the utility model can be conveniently installed on the bracket of the belt conveyor 200 through the base 5, see Figure 7 .

[0037] like Figure 7 and Figure 8 As shown, according to the embodiment of the second aspect of the utility model, the belt conveyor 200 includes a belt 201 and a contact plate 400 suspended above the belt 201, and also includes the fiber optic passive material flow switch 100 of the first aspect of the utility model. The swing arm 32 of the fiber optic passive material flow switch 100 is connected to the contact plate 400. The swing arm 32 can realize bidirectional triggering. There is no need to consider the positive and reverse installation during installation. The contact plate 400 can reset itself by gravity after being moved.

[0038] When the belt conveyor 200 of the utility model is working, when the adhesive belt 201 carries the material and passes under the optical fiber passive material flow switch 100, Figure 8 In the direction of the middle arrow 300, the raised material will push the contact plate 400 to rotate around the axis, and the contact plate 400 will drive the swing arm 32 to move, and transmit the action signal to the press 20 through the rotating shaft 31, the turntable 30 and the guide wheel 7. After the press 20 moves, the optical fiber sensor 2 is triggered to collect the action signal and convert the action signal into a light signal to obtain a material flow signal.

[0039] In addition, after the passive fiber flow switch 100 is connected to the optical modem by optical fiber, the optical fiber sensor 2 starts to work, and the optical fiber sensor 2 is triggered after the pressing plate 20 swings, and the wavelength of the refraction signal of the internal grating will be offset to a certain extent; and the use of optical fiber switch assemblies with different wavelength specifications can realize the connection and positioning of multiple passive fiber flow switches 100 on one optical fiber core. The optical modem will read this offset and demodulate the optical signal for use by the control system of the belt conveyor 200, or directly issue an alarm signal.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications made within the spirit and principles of the present invention, improvements to an equivalent optical fiber passive material flow switch and a belt conveyor, etc., should be included in the protection scope of the present invention.

Claims

1. An optical fiber passive material flow switch, comprising a housing, an optical fiber sensor and a pressing piece are arranged in the housing, one end of the pressing piece is fixed on the optical fiber sensor, characterized in that: The switch also includes a rotating mechanism and a guide wheel; The rotating mechanism comprises a rotating disk, a rotating shaft coaxially arranged with the rotating disk, and a swing arm connected to one end of the rotating shaft, wherein the rotating shaft is rotatably arranged on the housing, the swing arm is located outside the housing, and an arc groove is arranged on the outer edge of the rotating disk; The guide wheel is arranged on the arc groove, and the guide wheel is connected to the other end of the pressing sheet; The swing arm swings, driving the rotating shaft and the rotating disk to rotate, causing the guide wheel to roll on the arc groove to push the pressing piece to swing, triggering the optical fiber sensor to detect an action signal and output a corresponding optical signal.

2. The optical fiber passive material flow switch according to claim 1, characterized in that: One end of the pressing sheet is provided with two connecting ear plates which are arranged opposite to each other, and the guide wheel is arranged between the two connecting ear plates.

3. The optical fiber passive material flow switch according to claim 1, characterized in that: The housing comprises a first housing and a second housing that are buckled together. The first housing and the second housing together form a housing cavity. The housing cavity contains the optical fiber sensor, the pressing sheet and the turntable.

4. The optical fiber passive material flow switch according to claim 3, characterized in that: A support frame is arranged in the first shell, and the optical fiber sensor is arranged on the support frame.

5. The optical fiber passive material flow switch according to claim 3, characterized in that: The second shell is provided with a long through hole, and the rotating shaft is arranged in the long through hole.

6. The optical fiber passive material flow switch according to claim 5, characterized in that: The outer end of the rotating shaft is fixedly connected to one end of the swing arm through a screw, and a limiting protrusion is provided on the rotating shaft, and the limiting protrusion is located on the outer side of the long through hole.

7. The optical fiber passive material flow switch according to claim 5, characterized in that: The inner end of the rotating shaft fixes the rotating disk via a locking nut and a gasket.

8. The optical fiber passive material flow switch according to claim 1, characterized in that: A base is arranged at the bottom of the shell.

9. A belt conveyor, comprising an adhesive belt and a contact plate suspended above the adhesive belt, characterized in that: It also comprises the fiber optic passive material flow switch according to any one of claims 1 to 8, wherein the swing arm of the fiber optic passive material flow switch is connected to the contact plate.

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