Longitudinal tear detector

Abstract

The utility model relates to the technical field of conveyor belt detection, in particular to a longitudinal tear detector. Comprising two side vertical plates, mounting plates are arranged on the outer sides of the side vertical plates, the two side vertical plates are located at the two ends of the rotating shaft respectively and rotationally connected with the rotating shaft, a detection frame is arranged on the rotating shaft, at least one end of the rotating shaft is provided with a rotating arm, and tension springs enabling the detection frame to be in a normal working state are arranged between the rotating arms and the side vertical plates. A limiting switch is arranged on one side of the side vertical plate, a trigger strip parallel to the axis of the rotating shaft is arranged on one side of the detection frame, and when the detection frame is in a normal working state, the trigger strip triggers the limiting switch, and at the moment, the trigger strip, the limiting switch and the rotating shaft are located on the same straight line. The problem of forward and reverse directions does not need to be considered during installation.

Description

Technical Field

[0001] The utility model relates to the technical field of conveyor belt detection technology, in particular to a longitudinal tear detector. Background Art

[0002] When a belt conveyor transports materials, it may be punctured by the materials. If not discovered and disposed of in time, it will cause the consequence of large-area tearing of the belt. The patent with the application number 202321266118.X discloses a mechanical conveyor belt tear upper and lower double detection device. The upper belt detector includes an intermediate rod, and both ends of the intermediate rod are installed in pedestal bearings. An upper detection rod is fixed on the upper side of the intermediate rod, and the upper detection rod is close to the lower surface of the upper belt; a counterweight plate is connected to the lower side of the intermediate rod through a connecting plate; the upper belt detector also includes an upper mounting seat, the horizontal part of the upper mounting seat fixes the pedestal bearing, and the vertical part is detachably fixed to the channel steel of the conveyor frame; at least one end of the intermediate rod is installed with a ratchet wheel, a trigger head protruding from its periphery is fixed on the ratchet wheel, and a proximity switch is arranged beside the trigger head; the proximity switch is connected to the conveyor controller by a cable; the ratchet wheel is also provided with a reverse prevention component, and the sharp angle of the reverse prevention component is clamped on the ratchet wheel through a tension spring. The trigger head on the upper belt detector is located on one side of the proximity switch, resulting in that the upper detection rod can only make the trigger head trigger the proximity switch when rotating in the correct direction, and cannot make the trigger head trigger the proximity switch when rotating in the other direction. Therefore, when installing the upper belt detector, attention needs to be paid to the forward and reverse directions. If the direction is wrong, it will not work. Summary of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a longitudinal tear detector in view of the above-mentioned existing technical deficiencies.

[0004] To solve the above technical problem, the technical solution adopted by the utility model is: a longitudinal tear detector, including two side plates, mounting plates are arranged on the outer sides of the side plates, and further including a rotating shaft. The two side plates are respectively located at both ends of the rotating shaft and are rotationally connected thereto. A detection frame is arranged on the rotating shaft. At least one end of the rotating shaft is provided with a rotating arm. A tension spring capable of enabling the detection frame to be in a normal working state is arranged between the rotating arm and the side plate. A limit switch is arranged on one side of the side plate. A trigger bar parallel to the axis of the rotating shaft is arranged on one side of the detection frame. When the detection frame is in a normal working state, the trigger bar triggers the limit switch, and at this time, the trigger bar, the limit switch and the rotating shaft are on the same straight line.

[0005] To further optimize the above technical solution, the limit switch is located on the outer side of the side plate, and an arc-shaped extending channel is arranged on the side plate, and the trigger bar extends out from the channel.

[0006] To further optimize this technical solution, a receiving plate is provided on one side of the rotating shaft, and a counterweight for balancing the receiving plate is provided on the other side of the rotating shaft.

[0007] To further optimize this technical solution, when the detection frame is in the normal working state, it is in a vertical state, and when the detection frame is in the normal working state, the receiving plate is in a horizontal state.

[0008] To further optimize this technical solution, an anti-resetting device is further provided on the outer side of the side vertical plate. The anti-resetting device includes a cylinder body provided with a blind hole, a top rod is slidably connected to the blind hole, and a pressure spring is provided between the top rod and the bottom surface of the blind hole. When the detection frame is in the normal working state, the end of the top rod away from the cylinder body contacts the side of the trigger strip away from the limit switch.

[0009] Compared with the prior art, the present utility model has the following advantages: 1. When the detection frame rotates clockwise and counterclockwise, the trigger strip will disengage from the limit switch, so there is no need to consider the issue of the forward and reverse directions when installing this device; 2. A receiving plate and a counterweight are respectively provided on both sides of the rotating shaft. When there is a certain amount of material falling on the receiving plate due to a hole in the belt, the trigger strip will disengage from the limit switch. Description of the Drawings

[0010] Figure 1 It is a structural schematic diagram of a longitudinal tearing detector.

[0011] In the figure: 1. Side vertical plate; 11. Mounting plate; 2. Rotating shaft; 3. Counterweight; 4. Detection frame; 5. Limit switch; 6. Trigger strip; 7. Rotating arm; 8. Tension spring; 9. Receiving plate; 10. Anti-resetting device. Detailed Embodiments

[0012] To make the purpose, technical solution and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present utility model. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present utility model.

[0013] Detailed Embodiments: In combination with Figure 1As shown in the figure, a longitudinal tearing detector includes two side plates 1. An installation plate 11 is arranged on the outer side of the side plate 1. The detector further includes a rotating shaft 2. The two side plates 1 are respectively located at both ends of the rotating shaft 2 and are rotatably connected thereto. A detection frame 4 is arranged on the rotating shaft 2. The upper part of the detection frame 4 is close to the bottom surface of the belt but does not contact it. At least one end of the rotating shaft 2 is provided with a rotating arm 7. A tension spring 8 capable of enabling the detection frame 4 to be in a normal working state is arranged between the rotating arm 7 and the side plate 1. A limit switch 5 is arranged on one side of the side plate 1. The limit switch 5 is electrically connected to a controller. A trigger bar 6 parallel to the axis of the rotating shaft 2 is arranged on one side of the detection frame 4. The cross section of the trigger bar 6 is preferably rectangular. When the detection frame 4 is in a normal working state, the trigger bar 6 triggers the limit switch 5 and at this time the trigger bar 6, the limit switch 5 and the rotating shaft 2 are on the same straight line, and the operation of the belt conveyor will not be stopped at this time. During use, the axis of the rotating shaft 2 is perpendicular to the running direction of the belt and parallel to the width direction of the belt. When the belt is punctured, the puncture object touches the detection frame 4 and causes it to rotate a certain angle around the rotating shaft 2, so that the trigger bar 6 disengages from the limit switch 5. At this time, the controller will give an alarm and stop the operation of the conveyor belt. Since the trigger bar 6 will disengage from the limit switch 5 when the detection frame 4 rotates clockwise and counterclockwise, there is no need to consider the issue of the positive and negative directions when installing this device.

[0014] Preferably, the limit switch 5 is located on the outer side of the side plate 1. An arc-shaped extending channel is arranged on the side plate 1. The trigger bar 6 extends out from this channel.

[0015] Preferably, a receiving tray 9 is arranged on one side of the rotating shaft 2, and a counterweight 3 for balancing the receiving tray 9 is arranged on the other side of the rotating shaft 2. The torques generated by the receiving tray 9 and the counterweight 3 on the rotating shaft 2 are equal in magnitude. The volume of the counterweight 3 is small and its upper surface is not easy to retain materials. When the belt is punctured but the puncture object exposes less downward, it will not collide with the upper part of the detection frame 4. When the puncture object falls from the head of the conveyor belt, a hole will be left on the belt and the material will fall from this hole. When the material falling into the receiving tray 9 reaches a certain amount, the torque generated by it is large enough to cause the rotating shaft 2 and the detection frame 4 to rotate, so that the trigger bar 6 disengages from the limit switch 5. At this time, the controller will give an alarm and stop the operation of the conveyor belt.

[0016] Preferably, when the detection frame 4 is in a normal working state, it is in a vertical state, and when the detection frame 4 is in a normal working state, the receiving tray 9 is in a horizontal state, so that the torque generated by the gravity of the material in the receiving tray 9 is maximized.

[0017] Preferably, an anti-resetting device 10 is further provided on the outer side of the side vertical plate 1. The anti-resetting device 10 includes a cylinder body provided with a blind hole, and a push rod is slidably connected to the blind hole. A compression spring is provided between the push rod and the bottom surface of the blind hole. When the detection frame 4 is in a normal working state, one end of the push rod away from the cylinder body contacts the side of the trigger strip 6 away from the limit switch 5. When the trigger strip 6 is displaced, the push rod extends, so that the trigger strip 6 cannot return to its original position by itself. Only when the push rod is pressed back (a push piece can be provided on one side of the push rod to facilitate pressing back the push rod) can the trigger strip 6 return to its original position.

[0018] The above embodiments are only descriptions of the preferred implementation schemes of the present invention, and do not limit the protection scope of the present invention. Without departing from the design spirit of the present invention, any deformation and improvement made by those of ordinary skill in the art to the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. A longitudinal tear detector, comprising two side plates (1), wherein a mounting plate (11) is arranged on the outer side of the side plates (1), characterized in that: The invention also comprises a rotating shaft (2), wherein the two side plates (1) are respectively located at two ends of the rotating shaft (2) and are rotatably connected thereto, a detection frame (4) is arranged on the rotating shaft (2), a rotating arm (7) is arranged at at least one end of the rotating shaft (2), a tension spring (8) is arranged between the rotating arm (7) and the side plate (1) and is capable of putting the detection frame (4) in a normal working state, a limit switch (5) is arranged on one side of the side plate (1), and a trigger bar (6) parallel to the axis of the rotating shaft (2) is arranged on one side of the detection frame (4), and when the detection frame (4) is in a normal working state, the trigger bar (6) triggers the limit switch (5) and at this time, the trigger bar (6), the limit switch (5) and the rotating shaft (2) are on the same straight line.

2. A longitudinal tear detector according to claim 1, characterized in that: The limit switch (5) is located on the outside of the side plate (1); a channel extending in an arc shape is provided on the side plate (1), and the trigger bar (6) extends from the channel.

3. A longitudinal tear detector according to claim 1, characterized in that: A receiving plate (9) is arranged on one side of the rotating shaft (2), and a counterweight (3) for balancing the receiving plate (9) is arranged on the other side of the rotating shaft (2).

4. A longitudinal tear detector according to claim 3, characterized in that: When the detection frame (4) is in a normal working state, it is in a vertical state; when the detection frame (4) is in a normal working state, the receiving plate (9) is in a horizontal state.

5. A longitudinal tear detector according to claim 2, characterized in that: An anti-reset device (10) is also provided on the outer side of the side stand (1), the anti-reset device (10) comprising a cylinder provided with a blind hole, a push rod being slidably connected to the blind hole, a pressure spring being provided between the push rod and the bottom surface of the blind hole, and when the detection frame (4) is in a normal working state, an end of the push rod away from the cylinder contacts a side of the trigger bar (6) away from the limit switch (5).

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