Emergency stop mechanism of conveying belt

Abstract

The utility model discloses a scram mechanism of conveyer belt, including the casing, be equipped with speed sensor, solid-state relay, spacing subassembly and tumbler in the casing, the signal input end of speed sensor is electrically connected with tumbler, the signal output end of speed sensor is connected with the signal input end of solid-state relay, and the signal output end of speed sensor is connected with the signal input end of solid-state relay. The two ends of the rotating arm are connected with pull ropes, the ends, away from the rotating arm, of the pull ropes are connected with servo electric cylinders, the servo electric cylinders are provided with first tension sensor signal receivers, and the pull ropes are provided with tension sensors and rope tightening assemblies. According to the sudden stop mechanism, the pull rope is tightened, the sudden stop mechanism rapidly achieves sudden stop of the conveying belt through small changes of the pull force of the pull rope, the reaction speed is high, meanwhile, when one side of the pull rope is broken, the pull rope on the other side immediately and rapidly makes a response through changes of the pull force, sudden stop of the conveying belt is achieved, and reliability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic control equipment for conveyor belts, in particular to an emergency stop mechanism for conveyor belts. Background Art

[0002] Conveyors are material handling machines that continuously transport materials along a certain route, also known as continuous conveyors. Conveyors have large conveying capacity and long transport distances, and are widely used. In production, electrical protection devices are installed to ensure the safe and reliable operation of conveyors. One of them is an explosion-proof pull-rope switch arranged along the entire length of the conveyor. The existing explosion-proof pull-rope switch includes a housing, a rotating arm, a pull rope and other components. The rotating arm is arranged on the housing, and the two ends of the rotating arm are connected to the pull rope. If the staff finds an abnormality at any position of the conveyor, they can pull the pull rope nearby, and then the rotating arm moves, the switch moves, and the conveyor stops.

[0003] The pull rope of the existing explosion-proof pull rope switch is loose and cannot be tightened. Once tightened, the explosion-proof pull rope switch will be activated. When the staff pulls the pull rope, the pull rope needs to be tightened so that the explosion-proof pull rope switch can be activated. The reaction speed is slow and the reliability is poor. Therefore, we propose an emergency stop mechanism for the conveyor belt. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an emergency stop mechanism for a conveyor belt.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An emergency stop mechanism for a conveyor belt, comprising a shell, in which a speed sensor, a solid-state relay, a limit assembly and a rotating arm are arranged, the solid-state relay is connected to a control circuit of the conveyor belt, a signal input end of the speed sensor is electrically connected to the rotating arm, a signal output end of the speed sensor is connected to a signal input end of the solid-state relay, both ends of the rotating arm are connected to a pull rope, one end of the pull rope away from the rotating arm is connected to a servo electric cylinder, a first tension sensor signal receiver is arranged on the servo electric cylinder, and a tension sensor and a rope tightening assembly are arranged on the pull rope;

[0007] The rope tightening assembly includes a connecting rod, a cavity and an elastic member, the connecting rod is connected to the pull rope, a fixing plate is provided in the middle of the connecting rod, the connecting rod is arranged inside the cavity, a baffle is provided at one end of the cavity, the elastic member is installed between the baffle and the fixing plate, a scale line is provided at one end of the connecting rod, an external thread is provided at the other end of the connecting rod, an internal thread is provided at the end of the cavity away from the baffle, and the internal thread cooperates with the external thread.

[0008] Furthermore, the limit assembly includes a baffle rod, a slider, a linear guide rail, a motor and a second tension sensor signal receiver, one end of the baffle rod is connected to the rotating arm, and the other end of the baffle rod is connected to the slider, the slider drives the baffle rod to perform linear reciprocating motion along the linear guide rail, the motor drives the slider to slide, and the second tension sensor signal receiver is arranged on one side of the motor.

[0009] Furthermore, a status indicator light is provided on the housing, and the status indicator light is connected to the solid-state relay.

[0010] Furthermore, a wiring chamber is provided at the upper portion of the inner cavity of the shell, and the wiring chamber is used to place signal lines of the solid-state relay and the control circuit of the conveyor belt.

[0011] Furthermore, the elastic member is a spring, and the shape of the cavity is cylindrical.

[0012] Furthermore, a signal output terminal of the second tension sensor signal receiver is electrically connected to a signal input terminal of the motor.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The utility model provides an emergency stop mechanism for a conveyor belt, which is provided with a speed sensor, a solid-state relay, a limit assembly and a rotating arm. A pull rope is connected to both ends of the rotating arm, and a servo electric cylinder is connected to one end of the pull rope away from the rotating arm. A first tension sensor signal receiver is provided on the servo electric cylinder, and a tension sensor and a tight rope assembly are provided on the pull rope. The limit assembly can limit the rotating arm, and the pull rope is tightened by the tight rope assembly. The tight rope assembly can set the tension on the pull rope to a fixed value, and the tension sensor can detect a slight change in the tension on the pull rope. When the tension on the pull rope changes, the tension sensor can detect the change, and the tension sensor will immediately transmit a signal to the first tension sensor signal receiver, and then to the servo electric cylinder. The servo electric cylinder pulls the pull rope, and at this time the limit assembly no longer limits the rotating arm, and the rotating arm rotates under the pulling of the pull rope. The speed sensor can detect that the rotating arm has a rotation speed, and the speed sensor transmits a signal to the solid-state relay, which is triggered, thereby cutting off the control circuit of the conveyor belt and stopping the conveyor belt. The device responds quickly to slight changes in the tension of the rope and quickly stops the conveyor belt. At the same time, when the rope on one side breaks, the rope on the other side of the swing arm can also respond quickly and brake quickly, which improves reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the emergency stop mechanism of the conveyor belt of the embodiment of the utility model;

[0016] Figure 2 It is a rear view schematic diagram of the emergency stop mechanism of the conveyor belt of the embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the limit assembly of an embodiment of the utility model;

[0018] Figure 4 It is a schematic structural diagram of a tightening rope assembly according to an embodiment of the utility model.

[0019] Explanation of the accompanying drawings: 1. Housing, 2. Solid-state relay, 3. Speed ​​sensor, 4. Swivel arm, 5. Wiring chamber, 6. Wiring terminal, 7. Pull rope, 8. Tight rope assembly, 81. Connecting rod, 82. Spring, 83. Cavity, 84. Fixed plate, 85. Baffle, 86. Scale line, 9. Tension sensor, 10. Servo electric cylinder, 11. First tension sensor signal receiver, 12. Baffle rod, 13. Slider, 14. Linear guide, 15. Motor, 16. Second tension sensor signal receiver. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0021] See also Figure 1 to Figure 2The utility model provides an emergency stop mechanism for a conveyor belt, comprising a housing 1, in which a speed sensor 3, a solid-state relay 2, a limit assembly and a rotating arm 4 are arranged, the solid-state relay 2 is connected to the control circuit of the conveyor belt, the signal input end of the speed sensor 3 is electrically connected to the rotating arm 4, the signal output end of the speed sensor 3 is connected to the signal input end of the solid-state relay 2, the two ends of the rotating arm 4 are connected to a pull rope 7, the end of the pull rope 7 away from the rotating arm 4 is connected to a servo electric cylinder 10, the servo electric cylinder 10 is provided with a first tension sensor signal receiver 11, and the pull rope 7 is provided with a tension sensor 9 and a tight rope assembly 8. The limit assembly can limit the rotating arm 4, the pull rope 7 is tightened by the tight rope assembly 8, the tight rope assembly 8 can set the tension on the pull rope 7 to a fixed value, and the tension sensor 9 can detect a small change in the tension on the pull rope 7. When the tension on the pull rope 7 changes, the tension sensor 9 can detect this change, and the tension sensor 9 will immediately transmit the signal to the first tension sensor signal receiver 11, and then to the servo electric cylinder 10. The servo electric cylinder 10 pulls the pull rope 7. At this time, the limit component no longer limits the swing arm 4. The swing arm 4 rotates under the pull of the pull rope 7. The speed sensor 3 can detect that the swing arm 4 has a rotation speed. The speed sensor 3 transmits the signal to the solid-state relay 2, and the solid-state relay 2 is triggered, thereby cutting off the control circuit of the conveyor belt and stopping the conveyor belt. The device responds quickly to the slight change of the tension of the pull rope 7 and quickly realizes the emergency stop of the conveyor belt. At the same time, when the pull rope 7 on one side breaks, the pull rope 7 on the other side of the swing arm 4 can also respond quickly and quickly realize braking, thereby improving reliability.

[0022] See also Figure 1 and Figure 3The limit assembly is arranged on the right inner wall of the inner cavity of the housing 1, and the limit assembly includes a stopper 12, a slider 13, a linear guide 14, a motor 15 and a second tension sensor signal receiver 16. The stopper 12 may be in a circular, rectangular or polygonal shape, and as a preferred embodiment, the stopper 12 is in a rectangular shape. One end of the stopper 12 limits the rotating arm 4 to prevent the rotating arm 4 from rotating when the pull rope 7 is tightened, thereby triggering the brake. The other end of the baffle rod 12 is fixedly connected to the slider 13, and the slider 13 drives the baffle rod 12 to perform linear reciprocating motion along the linear guide 14. The linear guide 14 is installed on the housing 1. The motor 15 preferably adopts a servo motor. The servo motor drives the slider 13 to move along the linear guide 14 by driving the ball screw. The second tension sensor signal receiver 16 is arranged on one side of the motor 15. The signal output end of the second tension sensor signal receiver 16 is electrically connected to the signal input end of the servo motor. At the same time, the second tension sensor signal receiver 16 can receive the signal of the tension sensor 9 set on the pull rope 7, and then transmit the signal to the motor 15, so as to control the movement of the baffle rod 12 through the motor 15. When in use, the second tension sensor signal receiver 16 receives the signal from the tension sensor 9 arranged on the pull rope 7, and then transmits the signal to the motor 15. The motor 15 drives the ball screw to drive the slider 13 to move along the linear guide 14 toward the inside of the shell 1. At the same time, the slider 13 drives the baffle rod 12 to move together. At this time, the baffle rod 12 no longer limits the rotating arm 4, and the rotating arm 4 rotates under the pull of the pull rope 7.

[0023] See also Figure 4The tightening rope assembly 8 includes a connecting rod 81, a cavity 83 and an elastic member. The connecting rod 81 is connected to the pull rope 7. A fixing plate 84 is provided in the middle of the connecting rod 81. The connecting rod 81 is installed inside the cavity 83. The shape of the cavity 83 can be cylindrical, rectangular or polygonal. As a preferred embodiment, the shape of the cavity 83 is cylindrical. A baffle 85 is provided at one end of the cavity 83. The elastic member is a spring 82 or other elastic member. As a preferred embodiment, the elastic member is a spring 82, which is installed between the baffle 85 and the fixing plate 84. A scale line 86 is provided at one end of the connecting rod 81, and the tightening degree of the pull rope 7 can be judged by the scale line 86. The other end of the connecting rod 81 is provided with an external thread, and the end of the cavity 83 away from the baffle 85 is provided with an internal thread. The internal thread and the external thread cooperate with each other, and the cavity 83 can move left and right through the thread. The tightening rope assembly 8 can adjust the tightness of the drawstring 7. When in use, the cavity 83 is rotated, and the cavity 83 moves to the right. The baffle 85 in the cavity 83 compresses the spring 82. The compression of the spring 82 will give a reaction force to the fixing plate 84, and then the drawstring 7 will be tightened. The tightness of the drawstring 7 can be determined according to the scale line 86 exposed from the shell 1 on the connecting rod 81. The cavity 83 moves to the left, and the drawstring 7 will be loosened. In addition, when the ambient temperature changes greatly, the tightening rope assembly 8 needs to be adjusted in time to keep the drawstring 7 at the required tension.

[0024] The rotating arm 4 is arranged in the middle and lower part of the housing 1. The rotating arm 4 rotates clockwise. When the rotating arm 4 rotates, the speed sensor 3 can detect the speed of the rotating arm 4, and then transmit the signal to the solid-state relay 2 to trigger the brake. The housing 1 is also provided with a status indicator light, which is connected to the solid-state relay 2. The status indicator light can show whether the solid-state relay 2 is triggered. The upper part of the inner cavity of the housing 1 is also provided with a wiring room 5. The wiring room 5 is used to place the signal line of the solid-state relay 2 and the control circuit of the conveyor belt. The wiring terminal 6 of the wiring room 5 extends through the housing 1 to the outside of the housing 1. Through the wiring terminal 6, the solid-state relay 2 is connected in series to the control circuit of the equipment, which is used to directly disconnect the power supply of the control circuit in an emergency, so as to quickly stop the equipment to avoid danger.

[0025] Working principle: The tension on the pull rope 7 is adjusted by the rope tightening assembly 8, and the tension is set to a fixed value. The tension sensor 9 can detect slight changes in the tension on the pull rope 7. When the tension on the pull rope 7 changes, the tension sensor 9 transmits a signal to the first tension sensor signal receiver 11 and the second tension sensor signal receiver 16. The first tension sensor signal receiver 11 transmits the signal to the servo electric cylinder 10, and the second tension sensor signal receiver 16 transmits the signal to the servo motor. The servo motor immediately drives the slider 13 to drive the baffle rod 12 to move toward the inside of the housing 1. At this time, the baffle rod 12 no longer limits the rotating arm 4. At the same time, the servo electric cylinder 10 will pull the pull rope 7, and the pull rope 7 drives the rotating arm 4 to rotate. The speed sensor 3 detects that the rotating arm 4 has a rotation speed. The speed sensor 3 transmits a signal to the solid-state relay 2, which is triggered, thereby cutting off the control circuit of the conveyor belt and stopping the conveyor belt.

[0026] Specifically, when the pull rope 7 on one side breaks, the tension of the pull rope 7 on the other side of the swing arm 4 changes, and the tension sensor 9 transmits a signal to the first tension sensor signal receiver 11 and the second tension sensor signal receiver 16. The first tension sensor signal receiver 11 transmits a signal to the servo electric cylinder 10, and the second tension sensor signal receiver 16 transmits a signal to the servo motor. The servo motor immediately drives the slider 13 to drive the blocking rod 12 to move toward the inside of the shell 1. At this time, the blocking rod 12 no longer limits the swing arm 4. At the same time, the servo electric cylinder 10 will pull the pull rope 7, and the pull rope 7 drives the swing arm 4 to rotate. The speed sensor 3 detects that the swing arm 4 has a rotation speed, and the speed sensor 3 transmits a signal to the solid-state relay 2. The solid-state relay 2 is triggered, thereby cutting off the control circuit of the conveyor belt and stopping the conveyor belt.

[0027] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An emergency stop mechanism for a conveyor belt, characterized in that: The invention comprises a housing (1), wherein a speed sensor (3), a solid-state relay (2), a limit assembly and a rotating arm (4) are arranged in the housing (1), wherein the solid-state relay (2) is connected to a control circuit of a conveyor belt, a signal input end of the speed sensor (3) is electrically connected to the rotating arm (4), a signal output end of the speed sensor (3) is connected to a signal input end of the solid-state relay (2), a pull rope (7) is connected to both ends of the rotating arm (4), an end of the pull rope (7) away from the rotating arm (4) is connected to a servo electric cylinder (10), a first tension sensor signal receiver (11) is arranged on the servo electric cylinder (10), and a tension sensor (9) and a rope tightening assembly (8) are arranged on the pull rope (7); The tightening rope assembly (8) includes a connecting rod (81), a cavity (83) and an elastic member, wherein the connecting rod (81) is connected to the pull rope (7), a fixing plate (84) is provided in the middle of the connecting rod (81), the connecting rod (81) is arranged inside the cavity (83), a baffle (85) is provided at one end of the cavity (83), the elastic member is installed between the baffle (85) and the fixing plate (84), a scale line (86) is provided at one end of the connecting rod (81), an external thread is provided at the other end of the connecting rod (81), and an internal thread is provided at one end of the cavity (83) away from the baffle (85), and the internal thread cooperates with the external thread.

2. The emergency stop mechanism of a conveyor belt according to claim 1, characterized in that: The limit assembly comprises a baffle rod (12), a slider (13), a linear guide rail (14), a motor (15) and a second tension sensor signal receiver (16); one end of the baffle rod (12) is connected to the rotating arm (4), and the other end of the baffle rod (12) is connected to the slider (13); the slider (13) drives the baffle rod (12) to perform linear reciprocating motion along the linear guide rail (14); the motor (15) drives the slider (13) to slide; and the second tension sensor signal receiver (16) is arranged on one side of the motor (15).

3. The emergency stop mechanism of a conveyor belt according to claim 1, characterized in that: The housing (1) is provided with a status indicator light, and the status indicator light is connected to the solid-state relay (2).

4. The emergency stop mechanism of a conveyor belt according to claim 1, characterized in that: A wiring chamber (5) is provided at the upper part of the inner cavity of the housing (1), and the wiring chamber (5) is used to place signal lines of a solid-state relay (2) and a control circuit of a conveyor belt.

5. The emergency stop mechanism of a conveyor belt according to claim 1, characterized in that: The elastic member is a spring (82), and the cavity (83) is cylindrical in shape.

6. The emergency stop mechanism of a conveyor belt according to claim 2, characterized in that: The signal output end of the second tension sensor signal receiver (16) is electrically connected to the signal input end of the motor (15).

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