Cable looseness monitoring and protecting device for electric turner

Abstract

The utility model relates to a cable looseness monitoring and protecting device for an electric turner, which comprises a support arm and a cable reel support which are arranged on the turner, a cable reel is arranged on the cable reel support, a cable is arranged on the cable reel, one end of the support arm is fixed with the turner, and a detection mechanism is arranged at the other end of the support arm and comprises a guide support and a tilt angle sensor. The guide bracket is rotationally connected with the support arm; the cable penetrates through the guide support, the tilt angle sensor is fixed to the guide support, the output end of the tilt angle sensor is connected with a PLC, and the PLC is electrically connected with a driving motor. The driving motor is used for driving the turner to work. The guide support is rotationally connected with the support arm, the tilt angle sensor is fixed with the guide support, the cable penetrates through the guide support, when the cable is loosened, the guide support is driven to deflect, signals output by the tilt angle sensor are converted, and the PLC controls the driving motor to stop.

Description

Technical Field

[0001] The utility model relates to the technical field of tiller operation, in particular to a cable slack monitoring and protection device for an electric tiller. Background Art

[0002] In the field of sludge treatment, the composting machine is one of the important equipment in the aerobic composting industry of sludge. Its process performance and equipment operating parameters directly affect the production process and product quality. The power part of the existing composting machine is an electric motor driving a hydraulic pump, which then hydraulically controls various actions of the composting machine to complete the composting operation. Since the main motor of the composting machine is located in the composting control part that moves forward and backward, there is a power supply cable of about 103 meters long to provide power. The diameter of the cable is about 53mm, and its internal conductor is metal copper, so its overall weight is heavy. When working over long distances, the cable is subjected to greater tension. The supporting force provided by its hydraulic mechanism will gradually weaken with the aging of the hydraulic components, which will cause the cable to loosen. As the equipment runs, the cable is stirred into the interior of the composting machine, causing damage to the cable and causing the fault to expand.

[0003] Therefore, there is an urgent need for a cable slack monitoring device for a flipping machine, which can shut down the machine when the cable is slack to avoid the expansion of the fault. Summary of the invention

[0004] In order to solve the problem that the existing cable slack of the flipping machine cannot be monitored, the utility model proposes a cable slack monitoring and protection device for the electric flipping machine, comprising a guide bracket and a tilt sensor, the guide bracket is rotatably connected to the support arm, the tilt sensor is fixed to the guide bracket, the cable passes through the guide bracket, when the cable is slack and drives the guide bracket to deflect, the tilt sensor output signal changes, and the PLC controller controls the drive motor to stop.

[0005] To achieve the above purpose, the utility model proposes a cable slack monitoring and protection device for an electric flipping machine, comprising a support arm and a cable drum bracket arranged on the flipping machine, the cable drum bracket is provided with a cable drum, the cable drum is provided with a cable, one end of the support arm is fixed to the flipping machine, and the other end is provided with a detection mechanism, the detection mechanism comprises a guide bracket and an inclination sensor, and the guide bracket is rotatably connected to the support arm;

[0006] The cable passes through the guide bracket, the inclination sensor is fixed to the guide bracket, the output end of the inclination sensor is connected to a PLC controller, and the PLC controller is electrically connected to a drive motor;

[0007] The driving motor is used to drive the turning machine to work.

[0008] The cable passes through the guide bracket, which is rotatably connected to the support arm. When the cable is loose, the cable presses down to deflect the guide bracket, thereby changing the output of the inclination sensor. The PLC controller controls the drive motor to stop according to the output of the inclination sensor to protect the cable and the turning machine.

[0009] Furthermore, the guide bracket includes two side plates, an upper roller, a lower roller and a fixed rotating shaft;

[0010] The upper roller, the lower roller and the fixed rotating shaft are all arranged between the two side plates, the upper roller and the lower roller are arranged in parallel at the lower end of the side plate, and the fixed rotating shaft is arranged at the upper end of the side plate;

[0011] The upper roller, the lower roller and the fixed rotating shaft are all fixed to the two side plates.

[0012] The upper roller and the lower roller are set to limit the cable.

[0013] Furthermore, the side plate is a right-angled triangle plate, the support arm is an I-shaped plate, and the two side plates and the support arm are rotatably connected via the fixed rotating shaft;

[0014] The right-angled sides of the two side plates are provided with back plates, the back plates are square plates, the two ends of the back plates are fixed to the side plates, and the inclination sensor is fixedly arranged on the back plates.

[0015] The triangular plate body can rotate more widely when it is rotatably connected with the support arm. The support arm is an I-shaped plate body, which is convenient for connecting with the side plate.

[0016] Furthermore, a gap is left between the upper roller and the lower roller, and the cable passes through the gap between the upper roller and the lower roller to connect to the cable drum.

[0017] Furthermore, a control circuit is arranged between the PLC controller and the drive motor, and the control circuit includes a relay and a contactor. The coil of the relay is connected to the PLC controller, the normally open contact of the relay is connected to the coil of the contactor, the normally open contact of the contactor is connected to the drive motor, and the drive motor is connected to the power supply through the normally open contact of the contactor to form a loop.

[0018] Through the above technical solution, the beneficial effects of the utility model are:

[0019] The utility model realizes the detection of cable slack and performs shutdown protection on the flipping machine after the cable is slack. A guide bracket and an inclination sensor are provided, the guide bracket is rotatably connected to the support arm, the cable passes through the guide bracket, the inclination sensor is fixedly provided on the guide bracket, the output end of the inclination sensor is connected to the PLC controller of the flipping machine, and the PLC controller is used to control the power on and off of the drive motor. When the cable is tightened, the guide bracket deflects upward due to the tension of the cable, and when the cable is loose, the guide bracket deflects downward due to the gravity of the cable. The inclination sensor outputs different signals when the guide bracket deflects upward and downward, and the PLC controls the power on and off of the drive motor according to the electrical signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a structural schematic diagram of a cable slack monitoring and protection device for an electric turning machine according to the utility model;

[0021] Figure 2 This is a schematic diagram of the tensioning state structure of a cable slack monitoring and protection device for an electric flipping machine according to the utility model;

[0022] Figure 3 This is a schematic diagram of the slack state structure of a cable slack monitoring and protection device for an electric turning machine according to the utility model;

[0023] Figure 4 This is an electrical schematic diagram of a cable slack monitoring and protection device for an electric flipping machine of the utility model;

[0024] Figure 5 The utility model is a schematic diagram of the overall layout of a cable slack monitoring and protection device for an electric turning machine.

[0025] Figure numbers: 1 is a support arm, 2 is a cable drum bracket, 3 is a cable drum, 4 is a cable, 5 is an inclination sensor, 6 is a PLC controller, 7 is a drive motor, 8 is a side plate, 9 is an upper roller, 10 is a lower roller, 11 is a fixed shaft, 12 is a relay, 13 is a contactor, and 14 is a back plate. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0027] Example 1

[0028] like Figures 1 to 5 As shown, a cable slack monitoring and protection device for an electric flipping machine comprises a support arm 1 and a cable drum bracket 2 arranged on the flipping machine, a cable drum 3 is arranged on the cable drum bracket 2, and a cable 4 is arranged on the cable drum 3, characterized in that one end of the support arm 1 is fixed to the flipping machine, and the other end is provided with a detection mechanism, the detection mechanism comprises a guide bracket and an inclination sensor 5, and the guide bracket is rotatably connected to the support arm 1;

[0029] The cable 4 passes through the guide bracket, the inclination sensor 5 is fixed to the guide bracket, the output end of the inclination sensor 5 is connected to the PLC controller 6, and the PLC controller 6 is electrically connected to the drive motor 7;

[0030] The driving motor 7 is used to drive the turning machine to work.

[0031] Preferably, the guide bracket includes two side plates 8, an upper roller 9, a lower roller 10 and a fixed rotating shaft 11;

[0032] The upper roller 9, the lower roller 10 and the fixed rotating shaft 11 are all arranged between the two side plates 8, the upper roller 9 and the lower roller 10 are arranged in parallel at the lower end of the side plate 8, and the fixed rotating shaft 11 is arranged at the upper end of the side plate 8;

[0033] The upper roller 9 , the lower roller 10 and the fixed rotating shaft 11 are all fixed to the two side plates 8 .

[0034] Preferably, the side plate 8 is a right-angled triangle plate, the support arm 1 is an I-shaped plate, and the two side plates 8 are rotatably connected to the support arm 1 through the fixed rotating shaft 11;

[0035] The right-angled sides of the two side plates 8 are provided with a back plate 14 , which is a square plate. Both ends of the back plate 14 are fixed to the side plates 8 , and the inclination sensor 5 is fixedly provided on the back plate 14 .

[0036] Preferably, a gap is left between the upper roller 9 and the lower roller 10 , and the cable 4 passes through the gap between the upper roller 9 and the lower roller 10 to connect to the cable drum 3 .

[0037] Preferably, a control circuit is arranged between the PLC controller 6 and the drive motor 7, and the control circuit includes a relay 12 and a contactor 13, the coil of the relay 12 is connected to the PLC controller 6, the normally open contact of the relay 12 is connected to the coil of the contactor 13, the normally open contact of the contactor 13 is connected to the drive motor 7, and the drive motor 7 is connected to the power supply through the normally open contact of the contactor 13 to form a loop.

[0038] like Figure 2 and 3 As shown, when the cable 4 is in a tensioned state, the cable 4 deflects the side plate 8 upward by contacting the upper roller 9 due to the tension, and the inclination sensor 5 outputs a 4mA signal when the side plate 8 is nearly parallel to the ground. If the cable 4 is slack, the cable 4 will press the lower roller 10 downward due to its own gravity, so that the side plate 8 deflects downward, and the inclination sensor 5 outputs a 20mA signal when the side plate 8 is nearly vertical to the ground.

[0039] like Figure 4As shown, when the PLC controller 6 receives the 20mA signal, the PLC controller 6 de-energizes the coil of the relay 12, resets the normally open contact of the relay 12, de-energizes the coil of the contactor 13, resets the normally open contact of the contactor 13, and at this time, the drive motor 7 is de-energized and the flipping machine stops working.

[0040] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A cable slack monitoring and protection device for an electric flipping machine, comprising a support arm (1) and a cable drum support (2) arranged on the flipping machine, wherein a cable drum (3) is arranged on the cable drum support (2), and a cable (4) is arranged on the cable drum (3), wherein: One end of the support arm (1) is fixed to the turning machine, and the other end is provided with a detection mechanism, the detection mechanism comprising a guide bracket and an inclination sensor (5), the guide bracket being rotatably connected to the support arm (1); The cable (4) passes through the guide bracket, the inclination sensor (5) is fixed to the guide bracket, the output end of the inclination sensor (5) is connected to a PLC controller (6), and the PLC controller (6) is electrically connected to a drive motor (7); The driving motor (7) is used to drive the turning machine to work.

2. The cable slack monitoring and protection device for an electric flipping machine according to claim 1 is characterized in that: The guide bracket comprises two side plates (8), an upper roller (9), a lower roller (10) and a fixed rotating shaft (11); The upper roller (9), the lower roller (10) and the fixed rotating shaft (11) are all arranged between the two side plates (8); the upper roller (9) and the lower roller (10) are arranged in parallel at the lower end of the side plate (8); and the fixed rotating shaft (11) is arranged at the upper end of the side plate (8); The upper roller (9), the lower roller (10) and the fixed rotating shaft (11) are all fixed to the two side plates (8).

3. The cable slack monitoring and protection device for an electric flipping machine according to claim 2 is characterized in that: The side plate (8) is a right-angled triangular plate, the support arm (1) is an I-shaped plate, and the two side plates (8) and the support arm (1) are rotatably connected via the fixed rotating shaft (11); A back plate (14) is provided at the right-angled sides of the two side plates (8), wherein the back plate (14) is a square plate, and both ends of the back plate (14) are fixed to the side plates (8), and an inclination sensor (5) is fixedly provided on the back plate (14).

4. The cable slack monitoring and protection device for an electric flipping machine according to claim 2 is characterized in that: A gap is left between the upper roller (9) and the lower roller (10), and the cable (4) passes through the gap between the upper roller (9) and the lower roller (10) to connect to the cable drum (3).

5. The cable slack monitoring and protection device for an electric flipping machine according to claim 1 is characterized in that: A control circuit is provided between the PLC controller (6) and the drive motor (7), the control circuit comprising a relay (12) and a contactor (13), the coil of the relay (12) being connected to the PLC controller (6), the normally open contact of the relay (12) being connected to the coil of the contactor (13), the normally open contact of the contactor (13) being connected to the drive motor (7), and the drive motor (7) being connected to a power source via the normally open contact of the contactor (13) to form a loop.

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