阅读说明：本技术 一种跑偏开关 (Off tracking switch ) 是由 张媛 韩雷 孙雷 吴承瑞 贾传宝 岳彦博 于 2021-01-08 设计创作，主要内容包括：一种跑偏开关,解决现有技术中存在信号延迟、干扰因素强、信号传输不稳定的问题,涉及带式输送机皮带监测领域。具体包括壳体、光纤微动开关、受力机构；壳体内设有触发异形块和光纤微动开关；触发异形块通过转轴安装于壳体内部,且转轴的外端延伸至壳体外并设有转动连接板；触发异形块受转动连接板带动而旋转,使触发异形块的凸起面挤压光纤微动开关从而产生信号。与现有技术相比本发明的有益效果是：利用光纤作为传输介质,实现长距离带式输送机的沿线跑偏功能及定位定点功能,无需提供电源,避免了电磁干扰及信号不稳定,节省了电缆及其架设装置,大幅减少现场检修人员的工作强度及故障点的排查难度。(A deviation switch solves the problems of signal delay, strong interference factors and unstable signal transmission in the prior art, and relates to the field of belt monitoring of belt conveyors. The device specifically comprises a shell, an optical fiber microswitch and a stress mechanism; a trigger special-shaped block and an optical fiber microswitch are arranged in the shell; the trigger special-shaped block is arranged in the shell through a rotating shaft, and the outer end of the rotating shaft extends out of the shell and is provided with a rotating connecting plate; the trigger special-shaped block is driven by the rotating connecting plate to rotate, so that the convex surface of the trigger special-shaped block extrudes the optical fiber microswitch to generate a signal. Compared with the prior art, the invention has the beneficial effects that: the optical fiber is used as a transmission medium, the function of off tracking along the line and the function of positioning and fixing the point of the long-distance belt conveyor are realized, a power supply is not needed, electromagnetic interference and signal instability are avoided, cables and erecting devices thereof are saved, and the working strength of field maintainers and the difficulty of troubleshooting of fault points are greatly reduced.)

1. A deviation switch is characterized in that: comprises a shell (9), an optical fiber microswitch (3) and a stress mechanism;

the stress mechanism comprises a rotary roller (1), a rotary connecting plate (2), a trigger special-shaped block (4) and a rotary shaft (10); the rotating shaft (10) is arranged inside the shell (9); the trigger special-shaped block (4) is fixed on the rotating shaft (10); one end of the rotating shaft (10) extends out of the shell (9) and is connected with the rotating connecting plate (2); the rotary roller (1) is fixedly connected with the rotary connecting plate (2);

the trigger special-shaped block (4) is of an irregular structure of the outline;

the rotary roller (1) is inclined by stress to drive the trigger special-shaped block (4) to extrude the optical fiber microswitch (3), so that the optical fiber microswitch (3) is deformed to generate a signal.

2. The off tracking switch of claim 1, wherein: the trigger special-shaped block (4) is of a cam structure; the cam structure comprises a circular arc section profile taking the rotation center of the special-shaped block as a circle center and a profile with vector variation; the distance from the axis of the trigger special-shaped block (4) to the optical fiber microswitch (2) is less than the distance from the axis of the trigger special-shaped block (4) to the outermost end of the profile of the special-shaped block with radial variation.

3. The off tracking switch of claim 1, wherein: the optical fiber microswitch (3) comprises an optical fiber and a trigger switch, the optical fiber and the trigger switch are combined into a whole and are arranged on a microswitch base (7), and the microswitch base (7) is arranged in the shell (9).

4. The off tracking switch of claim 1, wherein: a spring (5) is arranged between the shell (9) and the trigger special-shaped block (4); one end of the spring (5) is connected with the trigger special-shaped block (4), and the other end of the spring (5) is connected with the shell (9).

5. The off tracking switch of claim 1, wherein: the optical fiber microswitch (3) is arranged above or below the trigger special-shaped block (4).

6. The off tracking switch of claim 1, wherein: be equipped with the trompil on triggering dysmorphism piece (4), trigger dysmorphism piece (4) and cup joint on pivot (10) and fix through mounting (6) through the trompil.

Technical Field

The invention relates to the field of protection and monitoring of belt conveyors, in particular to a deviation switch.

Background

The belt conveyor has the advantages of strong conveying capacity, long conveying distance, continuous work, high stability and the like, and is widely applied to production systems of coal mines, metallurgy, ports, cement and the like. With the development of the productivity level and the scientific technology in China, the belt conveyor develops towards the directions of intellectualization, long distance, large transportation volume and the like, and the safe and stable operation of the belt conveyor is very important.

In the transportation process of the belt conveyor, the deviation of the conveying belt can occur due to uneven blanking or other reasons, and the materials can be scattered or even other safety accidents can be caused when the deviation is serious. The existing deviation detection method is that a deviation of a trigger special-shaped block is caused by a deviation of a deviation conveyor belt touching a vertical roll of a sensor, a contact of an electrical element is touched, a switching value signal is output after the contact is switched on, and the start and stop of a belt conveyor are controlled.

Specifically, the invention relates to a resettable two-stage deviation switch installation method of a belt conveyor, which can refer to Chinese authorized invention patents, and the patent numbers are as follows: CN108263805A, as known from the literature, this detection method requires cabling and connection to a centralized control room to realize signal acquisition and use of electrical components. And each switching value deviation switch needs to be connected independently, so that the circuit and the control system thereof are relatively complex, and the cost of the laid cable is relatively increased. Secondly, because the existing belt conveyor mostly adopts a frequency conversion type driving mode, the harmonic wave of a power grid is larger, the problem of signal interference is very serious, the transmission rate and the stability of signals during long-distance transmission are seriously restricted, and the fault display is also inaccurate.

Disclosure of Invention

The invention provides a deviation switch, which can avoid interference of power grid harmonics by triggering a deviation signal through an optical fiber microswitch and realize deviation early warning and positioning functions.

In order to achieve the purpose, the invention provides the following technical scheme: a deviation switch comprises a shell, an optical fiber microswitch and a stress mechanism; the stress mechanism comprises a rotating roller, a rotating connecting plate, a trigger special-shaped block and a rotating shaft; the rotating shaft is arranged in the shell; the trigger special-shaped block is fixed on the rotating shaft; one end of the rotating shaft extends out of the shell and is connected with the rotating connecting plate; the rotary roller is fixedly connected with the rotary connecting plate; the trigger special-shaped block is of an irregular structure of the outline; the rotating roller is inclined through stress to drive the trigger special-shaped block to extrude the optical fiber micro switch, so that the optical fiber micro switch is deformed to generate a signal.

As an optimization, the trigger special-shaped block is of a cam structure; the cam structure comprises a circular arc section profile taking the rotation center of the special-shaped block as a circle center and a profile with vector variation; the distance from the axis of the trigger special-shaped block to the optical fiber microswitch is less than the distance from the axis of the trigger special-shaped block to the outermost end of the profile of the special-shaped block with the radial variation.

Preferably, the optical fiber microswitch comprises an optical fiber and a trigger switch, the optical fiber and the trigger switch are combined into a whole and are arranged on a microswitch base, and the microswitch base is arranged in the shell.

As optimization, a spring is arranged between the shell and the trigger special-shaped block; one end of the spring is connected with the trigger special-shaped block, and the other end of the spring is connected with the shell.

Preferably, the optical fiber microswitch is arranged above or below the trigger special-shaped block.

As an optimization, be equipped with the trompil on triggering the dysmorphism piece, trigger the dysmorphism piece and cup joint in the pivot through the trompil and fix through the mounting.

Compared with the prior art, the invention has the following beneficial effects: the invention drives the force bearing mechanism to incline by the deviation of the conveying belt of the belt conveyor, triggers the special-shaped block to trigger the optical fiber microswitch under the driving of the force bearing mechanism, and monitors the inclination degree of the force bearing mechanism by the optical fiber microswitch so as to judge the deviation condition of the conveying belt. By adopting the mode, firstly, the problem of electromagnetic interference is avoided, signals are not influenced by power grid harmonic waves in the transmission process, and the stability of signal transmission is improved; compared with the traditional deviation switch, the long-distance signal transmission and control can be realized without providing a power supply; and thirdly, the laying of cables and the erection of a circuit system are reduced, and the working strength of field maintainers and the difficulty of troubleshooting of fault points are greatly reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic left side view of the inventive structure.

Fig. 3 is a schematic diagram of the working principle of embodiment 1 of the present invention.

The automatic feeding device comprises a roller 1, a rotating connecting plate 2, an optical fiber microswitch 3, a trigger special-shaped block 4, a spring 5, a fixing piece 6, a microswitch base 7, a roller fastening bolt 8, a shell 9, a rotating shaft 10 and a conveying belt 11.

Detailed Description

Example 1:

a deviation switch comprises a shell 9, an optical fiber microswitch 3 and a stress mechanism; the stress mechanism comprises a rotary roller 1, a rotary connecting plate 2, a trigger special-shaped block 4 and a rotary shaft 10; the rotating shaft 10 is arranged inside the shell 9; the trigger special-shaped block 4 is fixed on the rotating shaft 10; one end of the rotating shaft 10 extends out of the shell 9 and is connected with the rotating connecting plate 2; the rotary roller 1 is fixedly connected with the rotary connecting plate 2; the trigger special-shaped block 4 is of an irregular structure; the rotating roller 1 is inclined through stress to drive the trigger special-shaped block 4 to extrude the optical fiber micro switch 3, so that the optical fiber micro switch 3 deforms to generate a signal.

The optical fiber micro switch 3 mainly utilizes the wavelength change rule of the optical fiber, the change of the optical fiber wavelength is determined according to the change of the strain force, namely, a corresponding wavelength section is arranged on the optical fiber micro switch 3, namely, the numerical value of the wavelength section corresponds to the optical curvature change of the optical fiber micro switch 3 caused by the extrusion of the trigger special-shaped block 4.

The trigger special-shaped block 4 is of a cam structure; the cam structure comprises a circular arc section profile taking the rotation center of the special-shaped block as a circle center and a profile with vector variation; the distance from the axis of the trigger special-shaped block 4 to the optical fiber microswitch 2 is less than the distance from the axis of the trigger special-shaped block 4 to the outermost end of the profile of the special-shaped block with the sagittal diameter change.

The optical fiber microswitch 3 comprises an optical fiber and a trigger switch, the optical fiber and the trigger switch are combined into a whole and are arranged on a microswitch base 7, and the microswitch base 7 is arranged in the shell 9.

A spring 5 is arranged between the shell 9 and the trigger special-shaped block 4; one end of the spring 5 is connected with the trigger special-shaped block 4, and the other end of the spring 5 is connected with the shell 9.

The optical fiber micro switch 3 is arranged above the trigger special-shaped block 4.

The trigger special-shaped block 4 is provided with a hole, and the trigger special-shaped block 4 is sleeved on the rotating shaft 10 through the hole and is fixed through the fixing piece 6.

The working principle is as follows:

as shown in fig. 3, the length, type and arrangement of the belt conveyor are determined, and the belt conveyor is respectively arranged at the head, the tail, the convex arc section and the concave arc section of the belt conveyor and at the middle position of the belt conveyor, and is symmetrically arranged at two sides of the belt conveyor in pairs, so that the rotating roller 1 is perpendicular to the belt edge plane of the conveying belt 11.

When the conveying belt 11 deviates, the rotating roller 1 in the device can rotate outwards due to the deviation of the conveying belt 11 to drive the connecting plate 2 and the trigger special-shaped block 4 to rotate, the optical fiber microswitch 3 can receive a trigger signal for triggering the special-shaped block 4, the deviation measurement is sensed and calculated according to the change of the strain force and is transmitted to the control system, an instruction is given, and the safety protection of the belt conveyor is realized. The maintainer can be according to control system's fault point location display function, finds the off tracking fault point fast, takes necessary maintenance measure, and the off tracking troubleshooting completion when the conveyer belt resets the back, and commentaries on classics roller 1 in this device, rotation connecting plate 2 and trigger dysmorphism piece 4 utilize the reaction force of spring 5 to reset.

Example 2:

embodiment 2 is different from embodiment 1 in that the optical fiber microswitch 3 is provided below the trigger profile block 4.

The working principle is the same as that of embodiment 1, and therefore, the description thereof is omitted.