Optical fiber passive tear switch and belt conveyor

Abstract

The utility model discloses an optical fiber passive tear switch and belt conveyor, wherein the optical fiber passive tear switch comprises a housing, a guide wheel, a push rod, a guide cylinder, a compression spring, a guide through hole, a spacing groove and a spacing assembly, an optical fiber sensor and a pressing sheet are arranged in the housing, the push rod is provided with an outer convex inclined plane, and the guide wheel is arranged on the outer convex inclined plane. During use, when materials on the adhesive tape damage the adhesive tape and damage the steel wire rope at the bottom of the adhesive tape, the steel wire rope pulls the limiting assembly, the limiting assembly is separated from the limiting groove, the push rod loses constraining force, the compression spring elastically resets at the moment, the push rod is pushed to move outwards, the guide wheel rolls on the outer convex slope, the pressing piece is driven to act, and the optical fiber sensor is triggered. The optical sensor detects an action signal and outputs a corresponding optical signal. Therefore, the signal detection of the tear switch is realized by adopting a mode of directly transmitting the switch signal by taking the optical fiber as a medium, and the tear switch has extremely long service life, stability, reliability and weather resistance.

Description

Technical Field

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

[0002] At present, all protection switches (sensors) including tear switches in the comprehensive protection system of belt conveyors mostly use power-on switches. For economy, the switch is transmitted to the upper control system through a certain communication system to realize the positioning of multiple switches. However, this solution requires the increase of control power supply, complex system composition, and the installation of electronic devices at the industrial site. The stability is easily affected by the temperature at the site. In addition, it is often affected by strong electromagnetic interference at the site, oxidation of communication cable connectors and other problems, resulting in a decrease in communication quality and even disconnection, which has a great impact on 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 tearing switch and a belt conveyor, which adopts the method of directly transmitting the switch signal through the optical fiber as the medium to realize the signal detection of the tearing switch, and there is no signal crosstalk and electromagnetic interference, no fear of lightning strikes, no failures and communication quality problems caused by leakage current, temperature and joint oxidation, 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 tear switch, comprising a shell, wherein an optical fiber sensor and a pressing piece are arranged in the shell, one end of the pressing piece is arranged on the optical fiber sensor, and the switch further comprises: a guide wheel, wherein the guide wheel is connected to the other end of the pressing piece; a push rod, wherein the push rod is provided with an outer convex inclined surface, and the guide wheel is arranged on the outer convex inclined surface; a guide cylinder, wherein the extension direction of the guide cylinder is the same as the movement direction of the push rod, one end of the guide cylinder is fixed to the inner wall of the shell, and one end of the push rod is arranged in the guide cylinder; a compression spring, wherein the compression spring is sleeved on the outer side of the push rod, one end of the compression spring is arranged at the end of the guide cylinder, and the other end of the compression spring is arranged at the end of the push rod; a guide through hole, wherein the guide through hole is arranged at On the shell, the other end of the push rod is arranged in the guide through hole; a limiting groove, the limiting groove is arranged on the shell, the bottom of the limiting groove is connected with the guide through hole, and the notch of the limiting groove is arranged on the outer wall of the shell; a limiting component, the limiting component is arranged in the limiting groove, one end of the limiting component is against the bottom of the limiting groove, and the other end of the limiting component is externally connected to a steel wire rope; the externally connected steel wire rope pulls the limiting component, and the limiting component disengages from the limiting groove, so that the push rod loses its restraining force, and the compression spring elastically resets, pushing the push rod to move outward, causing the guide wheel to roll on the outer convex inclined surface, pushing the pressing plate to act, triggering the optical fiber sensor, so that it detects the action signal and outputs the corresponding light signal.

[0006] Preferably, the limiting assembly includes a limiting ball and an elastic limiting member, the limiting ball is arranged in the limiting groove, the limiting ball is connected to a steel wire rope, the elastic limiting member is arranged in the limiting groove, and the elastic limiting member is used to limit the limiting ball in the limiting groove.

[0007] Preferably, the elastic limiting member is a limiting spring, and the limiting spring is arranged close to the notch side of the limiting groove.

[0008] Preferably, a frustum is provided on the push rod, and the side surface of the frustum serves as the convex inclined surface.

[0009] Preferably, the center lines of the guide cylinder and the guide through hole coincide with each other.

[0010] Preferably, one end of the shell is provided with an end opening, an end cover is provided at the end opening, and the guide through hole and the limiting groove are provided on the end cover.

[0011] Preferably, a support frame is provided in the housing, and the optical fiber sensor is provided on the support frame.

[0012] Preferably, the top of the shell is provided with a top opening, and a top cover is provided at the top opening.

[0013] Preferably, a base is provided at the bottom of the shell.

[0014] A belt conveyor comprises an adhesive belt and a steel wire rope arranged at the bottom of the adhesive belt, and also comprises the above-mentioned optical fiber passive tearing switch, wherein the steel wire rope is connected to the limit assembly of the optical fiber passive tearing switch.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are:

[0016] The optical fiber passive tear switch and belt conveyor of the utility model include a housing, a guide wheel, a push rod, a guide cylinder, a compression spring, a guide through hole, a limit groove and a limit assembly. An optical fiber sensor and a pressing piece are arranged in the housing. One end of the pressing piece is arranged on the optical fiber sensor, and the other end of the pressing piece is connected to the guide wheel. The push rod is provided with an outer convex inclined surface, and the guide wheel is arranged on the outer convex inclined surface. The two ends of the push rod are respectively arranged in the guide cylinder and the guide through hole. The outer side of the push rod is provided with a compression spring, and the two ends of the compression spring are respectively against the guide cylinder and the push rod. The limit assembly is arranged in the limit groove, one end of the limit assembly is against the bottom of the limit groove, and the other end of the limit assembly is externally connected to a steel wire rope. In actual use, a steel wire rope is arranged at the bottom of the belt of the belt conveyor, and one end of the steel wire rope is connected to the limit assembly. When the material on the tape destroys the tape and the steel wire rope at the bottom of the tape, the steel wire rope pulls the limit assembly to disengage the limit assembly from the limit groove, freeing the outer end of the push rod, that is, the push rod loses its restraining force. At this time, the compression spring elastically resets, pushing the push rod to move outward, causing the guide wheel to roll on the outer convex inclined surface to push the pressing action, triggering the optical fiber sensor, so that the optical fiber sensor detects the action signal and outputs the corresponding light signal. It can be seen that the optical fiber passive tear switch of the utility model uses optical fiber as a medium to directly transmit the switch signal to realize the signal detection of the tear switch. There is no signal crosstalk and electromagnetic interference, no fear of lightning strikes, no leakage current, temperature and connector oxidation leading to 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

[0017] Figure 1 It is a schematic diagram of the structure of the optical fiber passive tearing switch of the utility model when the top cover is removed;

[0018] Figure 2 This is the front view of the optical fiber passive tearing switch in the utility model;

[0019] Figure 3 It is a cross-sectional view of the optical fiber passive tearing switch in the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the optical fiber sensor and the push rod in the utility model;

[0021] Figure 5 It is a schematic diagram of the structure of the optical fiber sensor and the push rod in the utility model from another angle;

[0022] Figure 6 It is a schematic diagram of the optical fiber passive tear switch in the utility model when it is applied to a belt conveyor;

[0023] In the figure: 1-housing, 2-optical fiber sensor, 20-pressing sheet, 30-push rod, 300-convex inclined surface, 31-compression spring, 32-limiting ball, 33-guide cylinder, 34-elastic limiting member, 4-end cover, 40-limiting groove, 41-guide through hole, 5-top cover, 6-guide wheel, 7-base, 8-support frame, 9-limiting assembly, 100-optical fiber passive tear switch, 200-wire rope, 400-tape. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] like Figures 1 to 5 As shown together, according to the embodiment of the first aspect of the utility model, the optical fiber passive tear switch includes a housing 1 , in which an optical fiber sensor 2 and a pressing piece 20 are arranged, and one end of the pressing piece 20 is arranged on the optical fiber sensor 2 .

[0028] The utility model further includes a guide wheel 6, a push rod 30, a guide cylinder 33, a compression spring 31, a guide through hole 41, a limit groove 40 and a limit assembly 9; wherein the push rod 30 is provided with an outer convex inclined surface 300, the guide wheel 6 is provided on the outer convex inclined surface 300, and the guide wheel 6 is connected to the other end of the pressing piece 20, and the guide wheel 6 can roll on the outer convex inclined surface 300 to push the pressing piece 20 to swing, thereby triggering the optical fiber sensor 2. In a preferred embodiment, a frustum is provided on the push rod 30, and the side of the frustum is used as the outer convex inclined surface 300. The outer convex inclined surface 300 formed by this structure can make the guide wheel 6 reliably roll on the frustum.

[0029] One end of the guide cylinder 33 is fixed on the inner wall of the housing 1, specifically, it can be fixed by screws. The extension direction of the guide cylinder 33 is the same as the moving direction of the push rod 30, and one end of the push rod 30 is arranged in the guide cylinder 33; the housing 1 is provided with a guide through hole 41, and the other end of the push rod 30 is arranged in the guide through hole 41; in a preferred embodiment, the center lines of the guide cylinder 33 and the guide through hole 41 coincide, so that the push rod 30 can reliably move back and forth between the guide cylinder 33 and the guide through hole 41. At the same time, the outer side of the push rod 30 is sleeved with a compression spring 31, specifically, one end of the compression spring 31 abuts against the end of the guide cylinder 33, and the other end of the compression spring 31 abuts against the end of the push rod 30. When the outer end of the push rod 30 is abutted, the compression spring 31 is in a compressed state, and the pressing piece 20 is in a natural state.

[0030] The limiting groove 40 is provided on the housing 1, the bottom of the limiting groove 40 is connected to the guide through hole 41, and the notch of the limiting groove 40 is provided on the outer wall of the housing 1; the limiting assembly 9 of the utility model is provided in the limiting groove 40, one end of the limiting assembly 9 is against the bottom of the limiting groove 40, and the other end of the limiting assembly 9 is externally connected to the wire rope 200. Under normal conditions, the external wire rope 200 will not pull the limiting assembly 9, and the limiting assembly 9 is provided in the limiting groove 40 and against the outer end of the push rod 30.

[0031] like Figure 6As shown, in actual use, a steel wire rope 200 is provided at the bottom of the belt 400 of the belt conveyor, and one end of the steel wire rope 200 is connected to the limit assembly 9. When the material on the belt 400 destroys the belt 400 and the steel wire rope 200 at the bottom of the belt 400, the steel wire rope 200 pulls the limit assembly 9, so that the limit assembly 9 is separated from the limit groove 40, and the outer end of the push rod 30 is free, that is, the push rod 30 loses the restraining force. At this time, the compression spring 31 is elastically reset, pushing the push rod 30 to move outward, and the guide wheel 6 rolls on the convex inclined surface 300 to push the pressing sheet 20 to move, thereby triggering the optical fiber sensor 2, so that the optical fiber sensor 2 detects the action signal and outputs the corresponding light signal. It can be seen that the fiber optic passive tearing switch of the utility model adopts the method of directly transmitting the switch signal through the optical fiber as the medium to realize the signal detection of the tearing switch. There is no signal crosstalk and electromagnetic interference, no fear of lightning strikes, no failures and communication quality problems caused by leakage current, temperature and connector oxidation, and it 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.

[0032] In addition, the optical fiber passive tearing switch of the utility model can use optical fiber switch assemblies with different wavelength specifications to connect and position multiple optical fiber sensors 2 on one optical fiber core.

[0033] like Figure 3 , Figure 4 and Figure 5 As shown, in some embodiments of the utility model, the limiting assembly 9 includes a limiting ball 32 and an elastic limiting member 34, the limiting ball 32 is arranged in the limiting groove 40, the limiting ball 32 is externally connected to the wire rope 200, the elastic limiting member 34 is arranged in the limiting groove 40, and the elastic limiting member 34 is used to limit the ball 32 in the limiting groove 40. In a preferred embodiment, the elastic limiting member 34 is a limiting spring, the limiting spring is arranged near the notch side of the limiting groove 40, the limiting spring can be arranged in the installation groove arranged on the inner wall of the limiting groove 40, and the position is adjusted so that the limiting spring is sleeved on the outside of the limiting ball 32, or the limiting spring is blocked on the outside of the limiting ball 32, so that the limiting ball 32 is kept in the limit in the normal state. When the wire rope 200 pulls the limiting ball 32, the limiting spring is elastically deformed, so that the limiting ball 32 is separated from the limiting groove 40. Of course, the elastic limiting member 34 is not limited to the elastic springs listed above.

[0034] like Figure 1 and Figure 3 As shown, in some embodiments of the utility model, one end of the housing 1 is provided with an end opening, an end cover 4 is provided at the end opening, and a guide through hole 41 and a limit groove 40 are provided on the end cover 4; the top of the housing 1 is provided with a top opening, and a top cover 5 is provided at the top opening. The end cover 4 and the top cover 5 are respectively connected to the housing 1 by fasteners.

[0035] A support frame 8 is arranged in the shell 1 of the utility model, and an optical fiber sensor 2 is arranged on the support frame 8, so that the space in the shell 1 is reasonably arranged; a base 7 is arranged at the bottom of the shell 1, and the optical fiber passive tear switch of the utility model can be conveniently installed on the bracket of the belt conveyor through the base 7.

[0036] like Figure 6 As shown, according to an embodiment of the second aspect of the utility model, the belt conveyor includes a belt 400 and a steel wire rope 200 arranged at the bottom of the belt 400, and also includes the fiber optic passive tear switch 100 of the first aspect of the utility model, and the steel wire rope 200 is connected to the limiting assembly 9 of the fiber optic passive tear switch 100, specifically, the steel wire rope 200 is connected to the limiting ball 32.

[0037] When the belt conveyor of the utility model is working, when an emergency occurs at the transportation site of the adhesive belt 400, the wire rope 200 located at the bottom of the adhesive belt 400 is pulled, and the wire rope 200 pulls the limiting ball 32. The limiting ball 32 overcomes the elastic spring and disengages from the limiting groove 40, so that the outer end of the push rod 30 in the guide through hole 41 loses external force. At the same time, the compression spring 31 in the compressed state is reset, which pushes the push rod 30 to move outward. The guide wheel 6 is connected to one end of the pressing plate 20, so that it rolls on the convex inclined surface 300 of the moving push rod 30. Because the convex inclined surface 300 has an inclination, the guide roller rolls and pushes the pressing plate 20 to move upward, that is, the pressing plate 20 is actuated, and the optical fiber sensor 2 is triggered to collect the action signal, and then outputs the corresponding light signal.

[0038] In addition, the optical fiber passive tear switch 100 of the utility model is connected to the optical modem via an optical fiber. When the optical signal is transmitted to the optical modem, the optical modem obtains a corresponding action signal based on the optical signal, thereby detecting a fault in the wire rope 200. This action signal can be used in the control system or alarm system of the belt conveyor.

[0039] 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 tearing switch and a belt conveyor, etc., should be included in the protection scope of the present invention.

Claims

1. An optical fiber passive tear switch, comprising a housing, an optical fiber sensor and a pressing piece are arranged in the housing, one end of the pressing piece is arranged on the optical fiber sensor, characterized in that: The switch also includes: A guide wheel connected to the other end of the pressing sheet; A push rod, wherein the push rod is provided with an outer convex inclined surface, and the guide wheel is provided on the outer convex inclined surface; A guide cylinder, wherein the extension direction of the guide cylinder is the same as the moving direction of the push rod, one end of the guide cylinder is fixed to the inner wall of the shell, and one end of the push rod is arranged in the guide cylinder; A compression spring, wherein the compression spring is sleeved on the outside of the push rod, one end of the compression spring is arranged at the end of the guide cylinder, and the other end of the compression spring is arranged at the end of the push rod; A guide through hole, wherein the guide through hole is arranged on the housing, and the other end of the push rod is arranged in the guide through hole; A limiting groove, wherein the limiting groove is arranged on the housing, the bottom of the limiting groove is communicated with the guide through hole, and the notch of the limiting groove is arranged on the outer wall of the housing; A limiting component, wherein the limiting component is arranged in the limiting groove, one end of the limiting component is against the bottom of the limiting groove, and the other end of the limiting component is externally connected to a steel wire rope; The external steel wire rope pulls the limit assembly, and the limit assembly disengages from the limit groove, causing the push rod to lose its restraining force. The compression spring elastically resets, pushing the push rod to move outward, causing the guide wheel to roll on the convex inclined surface, pushing the pressing plate to move, triggering the optical fiber sensor, causing it to detect the action signal and output a corresponding light signal.

2. The optical fiber passive tearing switch according to claim 1, characterized in that: The limiting assembly includes a limiting ball and an elastic limiting member, the limiting ball is arranged in the limiting groove, the limiting ball is externally connected to a steel wire rope, the elastic limiting member is arranged in the limiting groove, and the elastic limiting member is used to limit the limiting ball in the limiting groove.

3. The optical fiber passive tearing switch according to claim 2, characterized in that: The elastic limiting member is a limiting spring, and the limiting spring is arranged close to the notch side of the limiting groove.

4. The optical fiber passive tearing switch according to claim 1, characterized in that: The push rod is provided with a frustum, and the side surface of the frustum serves as the convex inclined surface.

5. The optical fiber passive tearing switch according to claim 1, characterized in that: The center lines of the guide cylinder and the guide through hole coincide with each other.

6. The optical fiber passive tearing switch according to claim 1, characterized in that: An end opening is provided at one end of the shell, an end cover is provided at the end opening, and the guide through hole and the limiting groove are provided on the end cover.

7. The optical fiber passive tearing switch according to claim 1, characterized in that: A support frame is arranged in the shell, and the optical fiber sensor is arranged on the support frame.

8. The optical fiber passive tearing switch according to claim 1, characterized in that: The top of the shell is provided with a top opening, and a top cover is provided at the top opening.

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

10. A belt conveyor, comprising an adhesive belt and a steel wire rope arranged at the bottom of the adhesive belt, characterized in that: It also includes the optical fiber passive tearing switch according to any one of claims 1 to 9, wherein the steel wire rope is connected to the limit assembly of the optical fiber passive tearing switch.

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