Tearing detector

Abstract

The utility model relates to the technical field of safety switches, in particular to a tear detector. Comprising two supports and further comprises a detection rod, connecting rods are arranged on the two sides of the detection rod, positioning pieces are arranged on the outer sides of the connecting rods, the connecting rods are connected with rotating shafts perpendicular to the connecting rods, the two rotating shafts are rotationally connected with the two supports respectively, and the outer end of one rotating shaft is connected with an angle sensor. The support is provided with a positioning device which can act with the positioning piece to prevent the detection rod from rotating automatically, the two ends of the material receiving disc are connected with the two rotating shafts respectively, the two ends of the material receiving disc are end face plates connected with the inner sides of the rotating shafts, and an inclined bottom plate is arranged between the two end face plates. A front baffle extending upwards is arranged at the lower end of the bottom plate. The device can detect the condition that the belt is punctured and leaks materials.

Description

Technical Field

[0001] This utility model relates to the field of safety switch technology, and in particular to a tear detector. Background Technology

[0002] A tear detector is a device used to detect whether a conveyor belt is torn, in order to avoid greater losses caused by large-area tearing. Patent application number 202322382295.0 discloses a longitudinal tear detector, including a bottom sensing rope and detectors located on both sides of the conveyor belt. The bottom sensing rope connects the detectors on both sides and forms a sensing area. A sensing rope mounting frame extends downwards from below each detector. Each sensing rope mounting frame has a sliding groove and a sliding component for connecting the bottom sensing rope and adjusting the position of the sensing area. The sliding component has a fixing mechanism. One of the sensing rope mounting frames has a tensioning component that can adjust the length of the bottom sensing rope within the sensing area. Because it uses a sensing rope to monitor whether the belt is torn, it can only detect a tear when an object puncturing the belt touches the sensing rope. It cannot detect situations where the belt is punctured and leaking material (e.g., the object puncturing the belt has already fallen or been pushed back by a roller, leaving a hole in the belt). Utility Model Content

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

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: a tear detector, including two supports and a detection rod, with connecting rods on both sides of the detection rod, a positioning plate on the outer side of the connecting rod, and a rotating shaft perpendicular to the connecting rod. The two rotating shafts are rotatably connected to the two supports respectively, and an angle sensor is connected to the outer end of one of the rotating shafts. The support is provided with a positioning device that can act with the positioning plate to prevent the detection rod from rotating on its own. The two ends of the receiving tray are respectively connected to the two rotating shafts. The two ends of the receiving tray are end panels connected to the inner side of the rotating shafts. An inclined base plate is provided between the two end panels, and an upwardly extending front baffle is provided at the lower end of the base plate.

[0005] To further optimize this technical solution, a rear baffle extending downward is provided at the higher end of the base plate.

[0006] To further optimize this technical solution, the positioning device includes a housing, a through hole at the top of the housing, a pressure head slidably connected to the through hole, a blocking plate at the bottom of the pressure head that cannot pass through the through hole, a spring between the blocking plate and the bottom of the housing, a reset piece on one side of the blocking plate that extends from one side of the housing, an arc-shaped lower side of the positioning piece, and an arc-shaped top of the pressure head that matches the lower side of the positioning piece.

[0007] To further optimize this technical solution, an upper anti-detachment rod is provided at the lower end of the blocking plate, and a lower anti-detachment rod is provided at the bottom of the housing.

[0008] To further optimize this technical solution, a hollow section is provided on one side of the support, and the positioning piece extends outward through the hollow section.

[0009] Compared with the prior art, the present invention has the following advantages: the two ends of the detection rod are connected to the rotating shaft through the connecting rod, and the two ends of the receiving tray are also connected to the rotating shaft. An angle sensor is connected to the rotating shaft. When the object that punctures the belt touches the detection rod or when there is enough material in the receiving tray, the rotating shaft can be rotated and detected by the angle sensor, thereby detecting the situation of the belt being punctured and leaking material. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a tear detector.

[0011] Figure 2 for Figure 1 A magnified view of point I in the middle.

[0012] Figure 3 This is a schematic diagram of the positioning device.

[0013] Figure 4 This is a schematic diagram of the material receiving tray.

[0014] In the diagram: 1. Support; 11. Hollowed-out section; 2. Angle sensor; 3. Detection rod; 31. Connecting rod; 311. Positioning plate; 4. Rotating shaft; 5. Receiving tray; 51. End panel; 52. Front baffle; 53. Base plate; 54. Rear baffle; 6. Positioning device; 61. Pressure head; 62. Blocking plate; 63. Upper anti-detachment rod; 64. Spring; 65. Reset plate. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0016] Detailed implementation method: combined with Figure 1-4 As shown, a tear detector includes two supports 1 for connecting to the frame of a belt conveyor, and a detection rod 3. Connecting rods 31 are provided on both sides of the detection rod 3. The upper part of the detection rod 3 is concave to fit the bottom surface of the upper belt. Under normal circumstances, the detection rod 3 does not contact the upper belt, and there is a certain gap between them. A positioning piece 311 is provided on the outer side of the connecting rod 31. A rotating shaft 4 perpendicular to the connecting rod 31 is connected to the connecting rod 31. The two rotating shafts 4 are rotatably connected to the two supports 1 respectively. An angle sensor 2 is connected to the outer end of one of the rotating shafts 4. The supports 1 are provided with features that interact with the positioning piece 311 to prevent the detection rod 3 from self-destructing. The positioning device 6 for rotating conveyors has a receiving tray 5 with two ends connected to two rotating shafts 4 respectively. The two ends of the receiving tray 5 are end panels 51 connected to the inner side of the rotating shafts 4. An inclined base plate 53 is provided between the two end panels 51. Preferably, the axis of the rotating shaft 4 passes through the center of the base plate 53. A front baffle 52 extending upward is provided at the lower end of the base plate 53. The receiving tray 5 can receive the material that leaks from the hole punctured in the belt, and the material will gather towards the lower side of the base plate 53, thereby generating a greater torque. When enough material gathers, the rotating shaft 4 will rotate. The angle sensor 2 can detect the rotation and send the rotation signal to the controller of the belt conveyor.

[0017] Furthermore, a rear baffle 54 extending downward is provided at the higher end of the base plate 53, which can balance the torque generated by the front baffle 52.

[0018] Specifically, the positioning device 6 includes a housing with a through hole at the top. A pressure head 61 is slidably connected to this through hole. A blocking plate 62, preventing passage through the through hole, is located at the lower part of the pressure head 61. A compressed spring 64 is positioned between the blocking plate 62 and the bottom of the housing. A reset plate 65 extends from one side of the blocking plate 62. The lower side of the positioning plate 311 is arc-shaped, and the top of the pressure head 61 is arc-shaped to mate with the lower side of the positioning plate 311. The center of this arc is on the axis of the rotating shaft 4. Both the top of the pressure head 61 and the lower side of the positioning plate 311 have a certain degree of roughness, creating friction between them and preventing the rotating shaft 4 from rotating on its own. Preferably, the sum of the torques generated by the empty receiving tray 5 on the rotating shaft is zero. In this case, the minimum force required to move the positioning plate 311 relative to the pressure head 61 can be smaller, and the rotating shaft 4 can rotate even with less material in the receiving tray 5.

[0019] Furthermore, an upper anti-detachment rod 63 is provided at the lower end of the blocking plate 62, and a lower anti-detachment rod is provided at the bottom of the housing. The two ends of the spring 64 are respectively sleeved on the outside of the two anti-detachment rods, so that the spring 64 is not easy to shift or fall off.

[0020] Furthermore, a hollow portion 11 is provided on one side of the support 1, the positioning piece 311 extends outward through the hollow portion 11, and the positioning device 6 is provided on the outside of the support 1.

[0021] Working Principle: The tear detector of this application is installed on a belt conveyor between the upper and lower belts. When an object that punctures the belt and moves with it hits the detection rod 3, it causes the rotating shaft 4 to rotate. When sufficient material accumulates in the receiving tray 5, it also causes the rotating shaft 4 to rotate. The angle sensor 2 detects this rotation and sends the rotation signal to the belt conveyor controller. After the rotating shaft 4 rotates a certain angle, the positioning plate 311 disengages from the pressure head 61, and the pressure head 61 extends upwards a certain length until the blocking plate 62 contacts the housing. At this point, the detection rod 3 cannot reset itself. Pressing down on the reset plate 65 retracts the pressure head 61, allowing the detection rod 3 to return to its original position.

Claims

1. A tear detector comprising two supports (1), characterised in that: It also includes a detection rod (3), on both sides of the detection rod (3) are provided connecting rods (31), and on the outer side of the connecting rod (31) are provided positioning plates (311). The connecting rod (31) is connected to a rotating shaft (4) perpendicular to it. The two rotating shafts (4) are rotatably connected to two supports (1) respectively. An angle sensor (2) is connected to the outer end of one of the rotating shafts (4). The support (1) is provided with a positioning device (6) that can work with the positioning plate (311) to prevent the detection rod (3) from rotating by itself. The two ends of the receiving tray (5) are connected to the two rotating shafts (4) respectively. The two ends of the receiving tray (5) are end panels (51) connected to the inner side of the rotating shafts (4). An inclined bottom plate (53) is provided between the two end panels (51). The lower end of the bottom plate (53) is provided with an upwardly extending front baffle (52).

2. A tear detector according to claim 1, characterised in that: The higher end of the base plate (53) is provided with a downwardly extending rear baffle (54).

3. A tear detector according to claim 1, characterized in that: The positioning device (6) includes a housing, the top of which is provided with a through hole, and the pressure head (61) is slidably connected to the through hole. The lower part of the pressure head (61) is provided with a blocking plate (62) that cannot pass through the through hole. A spring (64) is provided between the blocking plate (62) and the bottom of the housing. A reset piece (65) is provided on one side of the blocking plate (62). The reset piece (65) extends from one side of the housing. The lower side of the positioning piece (311) is arc-shaped, and the top of the pressure head (61) is arc-shaped to cooperate with the lower side of the positioning piece (311).

4. A tear detector according to claim 3, characterised in that: The lower end of the baffle plate (62) is provided with an upper anti-detachment rod (63), and the bottom of the housing is provided with a lower anti-detachment rod.

5. A tear detector according to any one of claims 1-4, characterized in that: The support (1) has a hollow part (11) on one side, and the positioning piece (311) extends outward through the hollow part (11).

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