Belt slipping detection protection device

Abstract

The utility model relates to a belt slip detection protection device which comprises a speed measuring mechanism and a controller, the speed measuring mechanism comprises a fixed support, the fixed support is arranged on the inner side of a belt of a belt conveyor, a crank arm is installed on the fixed support, one end of the crank arm is rotatably connected with the fixed support, and the other end of the crank arm faces the surface of the belt and is provided with a synchronous wheel. The synchronous wheel is rotatably connected with the crank arm, a tension spring is further installed between the fixing support and the crank arm and used for pressing the synchronous wheel on the surface of a belt, a plurality of sensing parts are evenly distributed on the synchronous wheel along the circumference, a supporting rod is installed on one side of the crank arm, a photoelectric sensor is installed on the supporting rod, and the photoelectric sensor corresponds to the circumferential line position where the sensing parts are located. The photoelectric sensor is used for detecting the rotating speed of the synchronous wheel and is in signal connection with the controller, and the controller is in signal connection with a main control system of the belt conveyor; according to the utility model, whether the belt slips or not is effectively detected, and the conditions of heavy slipping and light slipping can be distinguished.

Description

TECHNICAL FIELD

[0001] The utility model relates to a belt conveyor equipment technical field, specifically a belt slip detection protection device. BACKGROUND

[0002] The belt conveyor is a kind of material conveying device commonly used in raw material, sintering, coking and iron-making areas of steel enterprises, which has simple structure, continuous operation in complex environment, low use cost and high efficiency.Belt slip is one of the common faults of the belt conveyor, and the slip phenomenon frequently occurs in outdoor installation and operation and long belt conveyor on slope in rainy and snowy weather.The traditional belt slip alarm protection device is generally installed on the upper layer of the belt conveyor or the tail wheel shaft, so it has high failure rate, poor safety and is not easy to maintain;In addition, some protection devices of the belt conveyor are composed of proximity switches, time relays and other components, which have poor reliability, cannot make accurate response in the fastest time, and have relatively high system equipment cost. SUMMARY

[0003] The utility model discloses a belt slip detection protection device to solve the problems of the prior art.

[0004] The specific scheme of the utility model is as follows: a belt slip detection protection device, including speed measuring mechanism and controller, the speed measuring mechanism includes fixed support, and the fixed support is arranged on the inner side of the belt conveyor, and a crank arm is arranged on the fixed support, and one end of the crank arm is rotatably connected with the fixed support, and the other end of the crank arm is arranged towards the surface of the belt and is provided with a synchronous wheel, and the synchronous wheel is rotatably connected with the crank arm, and a tension spring is further arranged between the fixed support and the crank arm, and the tension spring is used to press the synchronous wheel on the surface of the belt, a plurality of sensing parts are uniformly distributed on the circumference of the synchronous wheel, a supporting rod is arranged on one side of the crank arm, and a photoelectric sensor is arranged on the supporting rod, and the photoelectric sensor corresponds to the position of the circumferal line of the sensing part, and the photoelectric sensor is used to detect the rotating speed of the synchronous wheel, the photoelectric sensor is signal-connected with the controller, and the controller is signal-connected with the main control system of the belt conveyor.

[0005] Further, the controller adopts a PLC controller.

[0006] Further, the main control system of the belt conveyor is provided with an alarm, and the alarm is signal-connected with the controller.

[0007] Further, the alarm is provided with two kinds of alarm signals, which correspond to the two conditions of heavy belt slip and light belt slip respectively.

[0008] Compared with the prior art, the utility model has the following advantages: it can effectively detect whether the belt slips, distinguish the conditions of heavy belt slip and light belt slip, does not affect the normal work of the electronic belt scale, is easy to install, and has low equipment cost. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 is a structural perspective view of the utility model;

[0010] Figure 2 is Figure 1 front view of the utility model;

[0011] Figure 3 is Figure 2 enlarged view of V of the utility model;

[0012] In the figure: 1, belt; 2, fixed support; 3, tension spring; 4, crank; 5, synchronous wheel; 6, support rod; 7, photoelectric sensor. DETAILED DESCRIPTION

[0013] Referring to Figures 1-3 , the embodiment is a belt slip detection protection device, including speed measuring mechanism and controller, the speed measuring mechanism includes fixed support 2, fixed support 2 is arranged in the inner side of the belt 1 of belt conveyor, fixed support 2 is equipped with a crank 4, the crank 4 one end is rotatably connected with fixed support 2, the crank 4 other end is towards the surface of belt 1 and is equipped with synchronous wheel 5, synchronous wheel 5 is rotatably connected with crank 4, fixed support 2 and crank 4 between are also equipped with tension spring 3, tension spring 3 is used to make synchronous wheel 5 press tightly on the surface of belt 1, the synchronous wheel 5 is evenly distributed with several response parts along the circumference, the crank 4 one side is equipped with support rod 6, support rod 6 is equipped with photoelectric sensor 7, photoelectric sensor 7 corresponds with the circumferential line position of response part, photoelectric sensor 7 is used to detect the rotational speed of synchronous wheel 5, the photoelectric sensor 7 is signal connected with controller, and the controller is signal connected with the main control system of belt conveyor simultaneously.

[0014] The embodiment is described that synchronous wheel 5 is evenly distributed with several sectorial through holes along the circumference, the connecting part between sectorial through holes forms the response part when synchronous wheel 5 rotates, the response part and sectorial through hole alternately pass through photoelectric sensor 7 when synchronous wheel 5 rotates, so that photoelectric sensor 7 generates pulse signal, and the rotational speed of synchronous wheel 5 can be calculated by the number of pulses in unit time when pulse signal is transmitted into controller.

[0015] Further, the controller adopts PLC controller.

[0016] Further, the main control system of belt conveyor is equipped with alarm, and the alarm is signal connected with controller.

[0017] Further, the alarm is equipped with two kinds of alarm signals, and correspondingly two kinds of situations of belt 1 heavy slip and belt 1 light slip.

[0018] The working principle of the utility model is as follows: the linear speed A of the belt 1 wheel during the operation of the belt conveyor is the set speed, which can also be detected through the speed sensor in the main control system, during the operation process, since the synchronous wheel 5 is pressed against the inner side surface of the belt 1, the belt 1 will drive the synchronous wheel 5 to rotate, and the linear speed of the belt 1 is the same as that of the synchronous wheel 5, therefore, only the linear speed of the synchronous wheel 5 needs to be detected to measure the running speed B of the belt 1.

[0019] The principle of detecting the linear speed of the synchronous wheel 5 is as follows: during the rotation of the synchronous wheel 5, the sensing part and the fan-shaped through hole alternately pass through the photoelectric sensor 7, so that the photoelectric sensor 7 generates a pulse signal, the pulse signal is transmitted to the PLC controller, and the PLC controller can calculate the current linear speed B of the synchronous wheel 5 through the following formula: B=2πR×(P1 / P), wherein:

[0020] B: m / s, real-time linear speed of the belt;

[0021] R: m, radius of the synchronous wheel;

[0022] P1: number of pulses measured in real time;

[0023] P: number of pulses for one rotation of the synchronous wheel;

[0024] After the PLC controller calculates B, it compares B with A, and judges the current light slip or heavy slip state according to the following ratio:

[0025] No slip: B / A≤10%;

[0026] Light slip: B / A≤x%, (x can be set according to actual conditions, generally in the range of 70-90);

[0027] Heavy slip: B / A≤y%, (y can be set according to actual conditions, generally in the range of 0-70).

[0028] If it is determined that the slip is light, the PLC controller controls the alarm to issue a warning in the form of yellow light flashing, if it is determined that the slip is heavy, the PLC controller controls the alarm to issue a warning in the form of red light flashing, and the maintenance personnel can check and maintain in time according to the warning, so that the phenomenon of long-time slip of the belt, serious wear and even breakage can be effectively avoided.

Claims

1. A belt slippage detection and protection device, characterized in that: The system includes a speed measuring mechanism and a controller. The speed measuring mechanism includes a fixed bracket, which is located inside the belt of the conveyor belt. A crank arm is mounted on the fixed bracket, with one end of the crank arm rotatably connected to the fixed bracket and the other end facing the surface of the belt and equipped with a synchronous pulley. The synchronous pulley is rotatably connected to the crank arm. A tension spring is also installed between the fixed bracket and the crank arm to press the synchronous pulley against the belt surface. Several sensing elements are evenly distributed along the circumference of the synchronous pulley. A support rod is mounted on one side of the crank arm, and a photoelectric sensor is mounted on the support rod. The photoelectric sensor is positioned on the circumference of the sensing elements and is used to detect the rotational speed of the synchronous pulley. The photoelectric sensor is signal-connected to the controller, which is also signal-connected to the main control system of the conveyor belt.

2. The belt slippage detection and protection device according to claim 1, characterized in that: The controller is a PLC controller.

3. The belt slippage detection and protection device according to claim 1, characterized in that: The main control system of the belt conveyor is equipped with an alarm, which is connected to the controller via a signal connection.

4. The belt slippage detection and protection device according to claim 3, characterized in that: The alarm device has two alarm signals, corresponding to two situations: heavy belt slippage and light belt slippage.

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