CN219770919U

CN219770919U - Conveyer belt protection device that skids

Info

Publication number: CN219770919U
Application number: CN202320994013.XU
Authority: CN
Inventors: 贾春霞; 刘晓虹; 李娜; 孟如
Original assignee: Beijing Zhong Chi Automation Equipment Co ltd
Current assignee: Beijing Zhong Chi Automation Equipment Co ltd
Priority date: 2023-04-27
Filing date: 2023-04-27
Publication date: 2023-09-29
Anticipated expiration: 2033-04-27

Abstract

The utility model relates to a conveyer belt slip protection device, and belongs to the technical field of belt conveyers. The technical proposal is as follows: C1-Cn placement grooves (5) are formed in the inner ring surface of the ring frame (6) along the circumferential direction, B1-Bn electromagnets (2) are arranged in the C1-Cn placement grooves (5), and the B1-Bn electromagnets (2) are matched with A1-An electromagnetic chuck (1); the ring frame (6) is obliquely sleeved on the roller (7) and the conveying belt (8), and the electromagnetic chucks A1-An (1) on the ring frame (6) are adsorbed on the roller (7) and press the conveying belt (8) between the electromagnetic chucks (1) and the roller. The utility model has the positive effects that: 1. the tensioning force and the equipment cost of the tensioning device when the conveyor is started are reduced; 2. the friction coefficient of the surface of the roller is improved; 3. the abrasion of the conveying belt and the roller is reduced, and the service lives of the conveying belt and the roller are prolonged; 4. the motor drive power of the conveyor is reduced.

Description

Conveyer belt protection device that skids

Technical Field

The utility model relates to a conveyer belt slip protection device, and belongs to the technical field of belt conveyer material conveying.

Background

The belt conveyor is continuous conveying equipment for conveying bulk materials efficiently and at low cost, and is widely applied to the fields of coal mines, metallurgy, foods, chemistry, port yards and the like. Along with the development of the conveyor in the transportation direction of long-distance transportation, large transportation capacity and complex working conditions, the parts of the conveyor also develop in the direction of high performance, long service life and low energy consumption, and the requirements on the reliability of the conveyor are also higher and higher. The belt conveyer consists of motor, driving unit, roller, frame, carrier roller, adhesive tape, tensioning unit, sweeping unit, braking unit, etc. and has the operation principle that the conveyer belt is connected into closed ring, and the belt conveyer is tensioned with the tensioning unit and driven by the motor to run continuously via the friction between the conveyer belt and the driving roller to reach the aim of conveying material from the loading end to the unloading end. When the conveyor operates normally, the forward friction force generated between the conveyor belt and the main roller is equal to the backward friction force generated between the conveyor belt and the carrier roller and the roller thereof, and at the moment, the speed of the conveyor belt is equal to the surface line speed of the outer surface of the roller. When the forward friction force generated between the conveyor belt and the main roller is reduced to a certain value, the speed of the conveyor belt is reduced, and a difference value is generated between the speed of the conveyor belt and the rotating speed of the main roller, so that the phenomenon of slipping of the conveyor occurs. The belt conveyor slipping can cause material scattering, tail chute coal piling, and serious accidents such as belt grinding and motor burning can be caused when serious accidents happen.

The transmission mode of the belt conveyor belongs to belt transmission in flexible transmission, the conveying belt is a viscoelastic body made of rubber and synthetic materials thereof, and the transmission mode has the characteristics of easy occurrence of slipping, inconstant transmission ratio, low service life of the conveying belt and the like, and the slipping accelerates the abrasion of the conveying belt, induces noise and influences the production efficiency. Slip has become an unavoidable safety constraint in the operation of belt conveyors and a bottleneck affecting the life of conveyor belts and rollers, affecting the reliability of conveyors and disturbing their development. The existing anti-slip technology is as follows:

1. the aligning carrier roller is adopted to increase the anti-deviation friction coefficient, so that the conveying efficiency of the conveying belt is improved;

2. the overload prevention is paid attention to equipment management, and the tensioning device is adjusted in a follow-up way;

3. increasing the friction coefficient of the surface of the drive roller is a common measure for preventing slipping;

4. and detecting smoke and overtemperature of the conveying belt as auxiliary means for monitoring slipping.

Tensioning devices are often used by various enterprises to increase the initial pretightening force of the conveyor belt, and ensure sufficient tension between the conveyor belt and the rollers to prevent the conveyor belt from slipping. The improvement of the tension of the conveyer belt not only improves the power of the roller motor and the cost of the tensioning equipment, but also frequently adjusts the fatigue strength of the tensioning device and the complexity of operation control, and reduces the service lives of the conveyer belt, the roller and the carrier roller.

Disclosure of Invention

The utility model aims to provide a conveyor belt slip protection device which reduces the tension force when a conveyor is started, improves the friction coefficient of the surface of a roller, reduces the abrasion of the conveyor belt and the roller, prolongs the service lives of the conveyor belt and the roller, reduces the driving power of a motor and solves the technical problems existing in the prior art.

The technical scheme of the utility model is as follows:

the slip protection device for the conveyer belt comprises a ring frame, wherein C1-Cn placement grooves are formed in the inner ring surface of the ring frame along the circumferential direction, B1-Bn electromagnets are arranged in the C1-Cn placement grooves, and the B1-Bn electromagnets are matched with A1-An electromagnetic chuck; the ring frame is obliquely sleeved on the roller and the conveying belt, and A1-An electromagnetic chucks on the ring frame are adsorbed on the roller and press the conveying belt between the electromagnetic chucks and the roller; an included angle smaller than 90 degrees is formed between the cylindrical surface of the ring frame and the cylindrical surface of the roller, and the radius of the ring frame is slightly larger than that of the cylindrical surface of the roller.

The basis of the included angle is as follows: the space on two sides of the roller allows the size of the ring frame to be installed, the joint of the ring frame and the edge of the roller is that the conveying belt is wrapped at the edge of the roller, the radius of the ring frame is slightly larger than the radius of the cylindrical surface of the roller, and the ring frame does not influence the normal operation of the roller and the conveying belt; the linear speed of the ring frame and the linear speed of the roller are synchronous (realized by adjusting the rotating speed of the ring frame driving motor), so that the electromagnet is ensured not to bear extra tension when being adsorbed on the roller.

The two sets of ring frames are respectively sleeved on two sides of the same roller and the conveyor belt in an inclined mode, and the ring frames are provided with a control device and a driving motor.

The electromagnetic chuck is connected with the electromagnet through a flexible connector, so that mutual separation is avoided.

The flexible connector comprises a spring pull wire, and two ends of the spring pull wire are respectively connected with the electromagnetic chuck and the electromagnet.

An electromagnet power line, a reset switch and a tension sensor are also arranged between the electromagnetic chuck and the electromagnet; E1-En tension sensors are arranged on the spring pull wire, the tension applied to the electromagnet during adsorption is detected, and the reset switch is used for detecting whether the electromagnetic chuck is retracted or not.

The electromagnet is inlaid and fixed at the bottom of the placement groove, a tension sensor and a power line retraction storage hole are arranged at the electromagnet in the placement groove, and the retracted electromagnet power line and the tension sensor are convenient to store.

The radius of the ring frame is as follows: electromagnetic chuck + spring stay + electromagnet power cord + electromagnetic chuck adsorption distance + redundancy (the space size that drum drive side and non-drive side equipment allow) +drum cylinder size.

The ring frame is arranged on two sides of the roller through a bracket of the ring frame, and the rotation of the ring frame is realized through a control device and motor drive which are configured by the ring frame.

The ring frame and the roller can rotate coaxially and not coaxially; the linear velocity of the ring frame is the same as the linear velocity of the drum.

The surface of the electromagnetic chuck, which is contacted with the roller, is made into a concave arc shape which is matched with the surface of the roller, so that the conveying belt is tightly contacted with the roller when being pressed onto the roller.

The arrangement groove is rectangular, and four frames are skimmed outwards, so that the electromagnetic chuck can return conveniently. The electromagnet and the placement groove leave a storage space for flexible connectors such as spring wires and the like of the electromagnetic chuck when the electromagnetic chuck returns, so that the electromagnetic chuck can be safely stored.

The polarity relationship between the electromagnet and the respective electromagnetic chuck is changed by changing the current direction between the electromagnet and the respective electromagnetic chuck, so that mutual attraction and mutual repulsion are formed; when the electromagnetic chucks repel each other, the electromagnetic chucks are pressed on the conveying belt; when the electromagnetic chucks attract each other, the electromagnetic chucks retract and leave the conveying belt.

When the electromagnetic chuck adsorbs on the roller, the control device controls the ring frame and the roller to rotate at the same linear speed, and when the conveyor starts and stops, the ring frame control device controls the rotating speed of the ring frame through the received operation signal of the conveyor control system, such as the rotating speed of the roller is fast or slow or stops, the ring frame can be adjusted to be synchronous with the ring frame, and whether the stall condition is obtained through a tension sensor on a spring pull wire, namely whether the stall condition is synchronous with the rotating speed of the roller normally.

The utility model has the positive effects that: 1. the tensioning force (calculated force calculated when the conveyor starts is reduced, namely the starting speed of a motor, the vehicle type tensioning capacity and the monitoring of the tensioning force) and the equipment cost of the tensioning device are reduced when the conveyor starts; 2. the friction coefficient of the surface of the roller is improved (the manufacturing cost of the roller and the conveyer belt is reduced, and the overhauling and maintenance cost of the roller and the conveyer belt is reduced); 3. the abrasion of the conveying belt and the roller is reduced, and the service lives of the conveying belt and the roller are prolonged; 4. the driving power of the motor is reduced (driving motor cost is reduced).

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic view of a stationary conveyor belt with electromagnets attached to a drum in accordance with an embodiment of the present utility model;

FIG. 3 is a schematic view of an electromagnet on a ring frame of an embodiment of the present utility model adsorbing and fixing a conveyor belt on a roller;

FIG. 4 is a schematic diagram of the action of a spring and a sensor for adsorbing and fixing a conveyor belt on a roller by an electromagnet according to an embodiment of the utility model;

FIG. 5 is a schematic diagram illustrating operation of an electromagnet and devices on a ring frame according to an embodiment of the present utility model;

in the figure: electromagnetic chuck 1 (A1-An), electro-magnet 2 (B1-Bn), spring wire 3, electro-magnet power line 4, setting groove 5 (C1-Cn), ring frame 6, roller 7, conveyer belt 8, decelerator 9, roller motor 10, ring frame bracket 11, tension sensor 12 (E1-En), tension sensor and power line retract storage hole 13.

Detailed Description

The utility model is further described by way of examples with reference to the accompanying drawings.

The utility model provides a conveyer belt protection device that skids, includes ring frame 6, and ring frame 6's inner ring face sets up C1 ~ Cn mounting groove 5 along the circumferencial direction, installs B1 ~ Bn electro-magnet 2 in the C1 ~ Cn mounting groove 5, and B1 ~ Bn electro-magnet 2 matches with A1 ~ An electromagnetic chuck 1; the ring frame 6 is obliquely sleeved on the roller 7 and the conveying belt 8, and A1-An electromagnetic chucks 1 on the ring frame 6 are adsorbed on the roller 7 and press the conveying belt 8 between the electromagnetic chucks 1 and the roller; an included angle smaller than 90 degrees is formed between the cylindrical surface of the ring frame and the cylindrical surface of the roller, and the radius of the ring frame 6 is slightly larger than the radius of the cylindrical surface of the roller 7. (the space at two sides of the roller is based on the included angle, the ring frame is allowed to be installed, the joint of the ring frame and the edge of the roller is formed by wrapping the conveyer belt on the edge of the roller), the radius of the ring frame 6 is slightly larger than the radius of the cylindrical surface of the roller 7, and the ring frame 6 does not influence the normal operation of the roller 7 and the conveyer belt 8; the linear speed of the ring frame and the linear speed of the roller are synchronous (realized by adjusting the rotating speed of the ring frame driving motor), so that the electromagnet is ensured not to bear extra tension when being adsorbed on the roller.

The two sets of ring frames 6 are respectively sleeved on two sides of the same roller 7 and the conveyor belt 8 in an inclined mode, and the ring frames are provided with a control device and a driving motor.

The electromagnetic chuck 1 and the electromagnet 2 which are connected in a matching way are connected through a flexible connector, so that mutual separation is avoided.

The flexible connector comprises a spring stay wire 3, and two ends of the spring stay wire 3 are respectively connected with the electromagnetic chuck 1 and the electromagnet 2.

An electromagnet power line 4 and a tension sensor 12 are also arranged between the electromagnetic chuck 1 and the electromagnet 2; E1-En tension sensors 12 are arranged on the spring pull wire 3, and the tension applied by the electromagnet during adsorption is detected.

The electromagnet 2 is inlaid at the bottom of the placement groove 5, a tension sensor and a power line retraction storage hole 13 are arranged at the electromagnet 2 in the placement groove 5, and the retracted electromagnet power line 4 and the tension sensor 12 are conveniently stored.

The radius of the ring frame 6 is as follows: electromagnetic chuck + spring stay + electromagnet power cord + electromagnetic chuck adsorption distance + redundancy (the space size that drum drive side and non-drive side equipment allow) +drum cylinder size.

The ring frame 6 is arranged at two sides of the roller 7 through a bracket 11 of the ring frame, and the rotation of the ring frame 6 is driven by a control device and a motor which are arranged on the ring frame.

The ring frame 6 and the roller 7 can rotate coaxially and not coaxially.

The surface of the electromagnetic chuck 1, which is contacted with the roller 7, is made into a concave arc shape which is matched with the surface of the roller, so that the conveyor belt is tightly contacted with the roller when being pressed onto the roller.

The shape of the placement groove is the same as that of the electromagnetic chuck 1, and the frame is skimmed outside, so that the electromagnetic chuck is convenient to return. The electromagnet and the placement groove leave a storage space for flexible connectors such as spring wires and the like of the electromagnetic chuck when the electromagnetic chuck returns, so that the electromagnetic chuck can be safely stored.

In the embodiment, the ring frames are respectively arranged at the two side edges of the conveyor roller, the electromagnetic chuck 1 is adsorbed at the two side edges of the conveyor belt and is wrapped on the roller, and the adsorption force of the electromagnetic chuck does not influence the blanking of the roller; the electromagnets 2 on the ring frames at the two sides of the roller 7 synchronously perform adsorption action with the respective electromagnetic chucks 1, so that the adsorption pressure born by the conveyor belt 8 around the two sides of the roller is the same, and the conveyor belt 7 is prevented from generating deviation faults due to the difference of the adsorption pressures at the two sides.

The cylindrical surface of the ring frame and the cylindrical surface of the roller form an included angle, and the size of the included angle is based on the following conditions: the space on two sides of the roller allows the size of the ring frame installation, the joint of the ring frame and the edge of the roller is that the conveyer belt is wrapped at the edge of the roller, and the radius size of the ring frame is slightly larger than the radius size of the cylindrical surface of the roller, and the radius size of the ring frame is as follows: electromagnetic chuck + spring stay + electromagnet power cord + electromagnetic chuck adsorption distance + redundancy (space size allowed by the drum driving side and non-driving side equipment) +drum cylinder size = ring frame size; the ring frame and the roller can rotate in different axes, but the linear speed of the ring frame and the roller is synchronous (realized by adjusting the rotating speed of the ring frame driving motor), so that the electromagnet is ensured not to bear extra pulling force when being adsorbed on the roller.

A plurality of ring frames can be arranged on the cylindrical surface of the non-blanking roller to be mutually connected, so that more electromagnets adsorb and fix the wrapping of the conveying belt on the roller;

the ring frame is driven by a control device and a motor of the ring frame and is connected to a conveyor control system through a network, when the electromagnetic chuck adsorbs on the roller, the ring frame and the roller rotate at the same linear speed, if the rotating speed of the roller is fast or slow or stops, the ring frame can be adjusted to be synchronous with the roller, and whether the roller stalls or not can be known through a tension sensor 12 on the spring pull wire 3, so that whether the rotating speed of the roller is normal or not can be known. Namely, whether the underspeed fault occurs on the conveying belt of the conveyor is detected, and the cause of underspeed is indirectly: the method comprises the steps of detecting tearing, slipping and overload of a conveying belt; as the ring frames are detected at the two sides of the roller at the same time, the mutual checksum detection can be realized, and the reliability of stall detection is enhanced.

By changing the current direction between the electromagnet 2 and the respective electromagnetic chuck 1 and changing the polarity relationship between the electromagnet 2 and the respective electromagnetic chuck 1, mutual attraction and mutual repulsion are formed; when the electromagnetic chucks repel each other, the electromagnetic chucks 1 are pressed on the conveying belt 8; when attracted to each other, the electromagnetic chuck 1 is retracted away from the conveyor belt 8.

The two ring frames 6 can use the same control device, the control device is a PLC or a singlechip or a miniature electric control device, corresponding software control programs and network communication ports (wireless or wired) are built in the control device and are connected with an upper controller of the conveyor system, and information data is received and uploaded; the electromagnetic chuck, the electromagnet and the tension sensor are powered by direct current and are supplied by a power supply slip ring arranged on the ring frame.

When the electromagnets B1-Bn are electrified positively, the same polarity as the electromagnetic chucks A1-An are generated (at the moment, although the electromagnetic chucks A1-An are powered off, 10% of residual magnetism is still generated, electromagnetic attraction is generated mutually), the electromagnetic chucks A1-An are pulled back to the mounting groove 5 and touch the reset switches K1-Kn, double insurance of reset of the electromagnetic chucks A1-An is formed by the electromagnetic chucks A1-An and the spring pull wire 3, and the reset is pulled back by utilizing the attraction of the residual magnetism and the residual magnetism is eliminated; when the electromagnets B1 to Bn are electrified reversely, the polarity opposite to that of the electromagnetic chucks A1 to An is generated, and the electromagnetic chucks A1 to An are pushed out of the placement grooves C1 to Cn.

The shape of the placement grooves C1-Cn is the same as that of the electromagnetic chuck 1, the frame is skimmed outwards, the electromagnetic chucks A1-An can return conveniently, the electromagnetic chuck 1, the electromagnet 2, the electromagnet power line 4, the tension sensor 12 and the like can be accommodated in the depth, the peripheral size is slightly larger than that of the electromagnetic chucks A1-An, and the separation and the return of the electromagnetic chucks are convenient.

The rotation of the ring frame is driven by a configured motor (an asynchronous machine plus a frequency converter or a servo motor), the driving motor can be installed on a bracket at the center point of the ring frame and is coaxially connected with the ring frame, and can also be installed at the outer circumference of the ring frame (a rack is installed at the inner edge or the outer edge of the outer circumference, the power supply motor is driven to rotate through a gear shaft, and the rack can be made of other materials such as metal or nylon), and the specific driving mode is determined according to the installation mode and the size of the conveyor roller; when the conveyor belt is about to be in wrapping contact with the roller (entering the initial stage of a wrapping angle), the electromagnets B1-Bn are electrified reversely, the electromagnetic chucks A1-An are electrified simultaneously, the polarities of the electromagnets B1-Bn are opposite, the electromagnets A1-An are driven to leave the placement grooves C1-Cn by the reverse electrification, the electromagnetic chucks A1-An are electrified and adsorbed on the roller, and the conveyor belt is pressed and fixed on the roller, so that the conveyor belt and the roller synchronously rotate together; when the conveyor belt is about to be separated from the roller (the end of the wrap angle), the electromagnetic chucks A1-An are powered off, the electromagnets B1-Bn are powered on in the forward direction at the same time, and the electromagnetic chucks A1-An are pulled back to the placement grooves C1-Cn on the ring frame by the pulling force of the spring pull wire and the suction force generated by the electromagnets B1-Bn. Each electromagnet on the ring frame acts repeatedly, so that firm fixation of the conveyer belt and the roller in contact is ensured, and the phenomenon of slipping does not occur. When the control device receives a stopping command of the conveyor, the tension sensors E1-En sense the rotating speed of the roller and synchronously stop the roller (including measures such as speed reduction and time delay), and the conveyor is started.

The working process of the embodiment comprises the following steps:

1) When a conveyor belt is required to be pressed and fixed on a roller, the electromagnetic chucks A1-An are electrified, the electromagnets B1-Bn are electrified reversely at the same time, the magnetic polarities generated by the electromagnetic chucks A1-An and the electromagnets B1-Bn are opposite, the generated electromagnetic attraction force is mutual repulsion, namely the electromagnetic chucks A1-An generate electromagnetic force to attract the roller through the conveyor belt, the electromagnetic chucks A1-An are also pushed to attract the roller by the electromagnetic forces generated by the electromagnets B1-Bn, and the electromagnetic chucks A1-An are pushed to the roller by the combined force of the electromagnetic chucks A1-An; when the reset switches K1-Kn act, the time delay confirms that the electromagnetic chucks A1-An are separated and the pulling force of the pulling force sensors E1-En reaches the values D1-Dn (which can be set), the electromagnetic chucks A1-An are confirmed to be adsorbed on the roller, namely the action of pressing the conveying belt is completed, at the moment, the electromagnets B1-Bn are powered off, the electromagnetic chucks A1-An are continuously powered on (after the conveying belt is separated from the surrounding angle, the electromagnetic chucks A1-An are powered off, the electromagnets B1-Bn are also powered on in the forward direction at the same time), and after the reset switches K1-Kn act, the electromagnets B1-Bn are powered off, and one action flow is completed);

2) When the electromagnetic chucks A1-An are required to be separated from the roller, the electromagnetic chucks A1-An are powered off, the electromagnets B1-Bn are powered on positively, the electromagnetic chucks A1-An are pulled back by the pulling force of the spring pull wire and the electromagnetic suction force of the electromagnets B1-Bn and reset to the placement grooves C1-Cn of the ring frame, and after the reset actions of the reset switches K1-Kn, the electromagnets B1-Bn are powered off, and the reset of the electromagnetic chucks A1-An is completed;

3) The working states of the electromagnetic chucks A1-An are as follows: electrifying and adsorbing the powder on the roller; the power is cut off, the roller is separated, and the roller is reset to the mounting grooves C1-Cn;

4) The electromagnets B1 to Bn work in the following states: reversely electrifying, pushing the electromagnetic chucks A1-An to be adsorbed on the roller; the electromagnetic chucks A1-An are adsorbed to the mounting grooves C1-Cn by forward power supply; reset switches K1-Kn reset actions or values of tension sensors D1-Dn (which can be set) are reached, and power is cut off.

When the conveying belt enters the wrapping roller initially, namely, when the conveying belt enters the wrapping angle of the roller initially, the electromagnetic chucks A1-An act and are adsorbed on the cylindrical shell of the roller, the conveying belt is fixed on the roller to rotate (the roller rotates, the ring frame rotates at the same linear speed) through electromagnetic attraction, when the conveying belt is separated from the end of the roller, which is positioned at the wrapping angle, the electromagnetic chucks A1-An are powered off, the electromagnets B1-Bn are powered on positively, after the electromagnetic chucks A1-An are reset to the mounting groove, the electromagnets B1-Bn are powered off, and one operation flow of the electromagnets is finished; (when the electromagnetic chucks A1-An and the electromagnets B1-Bn are electrified, the control device respectively starts a timing program to prevent the electromagnets from being damaged due to heating caused by long-time electrification).

Because the rotation direction of the conveyor roller is positive and negative, when the conveyor belt enters the surrounding angle of the roller initially, electromagnetic chucks A1-An to be operated on the ring frame can be positioned above or below the cylindrical surface of the roller;

when the electromagnetic chucks A1-An rotate below (or above) the cylindrical surface of the roller, the electromagnets B1-Bn are powered on positively, and the electromagnetic chucks A1-An reset and fall into the corresponding arrangement slots of the ring frame, so that the rotation of the roller is not influenced, and the operation of the conveying belt (the belt is separated from the surrounding angle of the roller) is not influenced. This is the advantage that the cylinder surface of the ring frame and cylinder surface form the included angle;

when the electromagnetic chucks A1-An initially adsorb on the roller shell, along with the rotation of different shafts of the ring frame and the roller, the tension forces D1-Dn between the ring frame and the electromagnetic chucks A1-An are gradually increased until the ring frame and the electromagnetic chucks A1-An reach the maximum tension forces D1-Dn when rotating to the surrounding angle at the center of the roller, and then the tension forces are gradually reduced until the electromagnetic chucks A1-An are powered off and reset; parameters such as the synchronous condition of the rotating speeds of the roller and the ring frame, the adsorption condition of the electromagnetic chucks A1-An and the like can be indirectly perceived through the change condition of the tension values D1-Dn detected by the tension sensors E1-En of the electromagnetic chucks A1-An, and monitoring data can be provided.

An infrared temperature test sensor (wireless or wired uploading information) is arranged on a supporting frame of the ring frame, the temperature of the surface of the roller is monitored in a non-contact mode, overheat damage is prevented, and the running state of the conveyor is guaranteed to be in a designed working range.

The utility model can be used in wrapping driving scenes at the contact part of the conveyor belt and the roller (whether the roller is a driving roller, a transmission roller, a direction-changing roller or other roller). The utility model ensures that the roller and the conveyor belt have no friction, reduces the outer surface loss of the conveyor belt and the roller, prolongs the service life of the conveyor belt and is suitable for the roller structure of the existing conveyor, and the device can be arranged without modifying or adding corresponding equipment.

Electromagnetic chuck formed by electromagnetic force generated when electromagnet is electrified is adsorbed at the edges of two sides of the conveyer belt and the roller, so that the purpose of fixing the conveyer belt on the roller without affecting material conveying is achieved. The suction force of the electromagnetic chucks A1-An can be finished by adjusting the outline dimension, the working voltage and the power of the electromagnets, and the electromagnets B1-Bn are also the same; the size and the power of the electromagnet, namely the electromagnetic chuck, can be determined according to the outline dimensions of the roller and the conveyor belt, and the arrangement distance of the electromagnetic chucks on the two edge sides of the roller and the conveyor belt, namely the force of the conveyor belt, which is not slipped and is required by the roller, is fixed, namely the resultant force of the electromagnetic chucks, which is required by the conveyor belt to be wrapped on the roller, is determined;

when the device is applied, the residual magnetism (10% of residual magnetism which cannot be overcome by an electromagnet product in principle) is generated on the edge side of the cylindrical surface of the roller, and the next adsorption is facilitated; and the electromagnetic chuck can generate slight vibration impact force to the adsorption of the roller and the mechanical interference generated by the close distance between the ring frame and the roller, and the vibration generated by the force is beneficial to removing the impurity fragments adhered by the residual magnetism of the roller and the ring frame.

The utility model only works in the approximate half cycle time of the circumference of the roller, belongs to an intermittent working system, can relieve the heat and the insulating strength grade when the electromagnet is electrified, and prolongs the service life of the device.

According to national and industry standards, the belt speed of the conveyor is 0.8-6.5 m/s, the bandwidth is 400-2400 mm, and the conveying capacity is 4000-20000t/h; the diameter of the roller is 250-1800 mm, the length of the roller is 500-2800 mm, the wrap angle of the conveyor belt wrapped on the roller (no matter the driving roller and the direction-changing roller) is 170-240 degrees, and the number and the suction force (power) of the electromagnetic chuck are calculated according to the wrap angle and the force of the fixed conveyor belt wrapped on the roller without slipping; according to the diameter and length dimensions of the cylinder, the overall dimension and the installation position of the electromagnetic chuck ring frame without a motor or a reducer (non-driving) at the driving cylinder are obtained, and the overall dimension and the installation position of the electromagnetic chuck ring frame at the driving end of the cylinder are determined according to the overall dimension of the motor or the reducer at the driving end and the space for idle space of the field. Because each ring frame is driven by the control device and the motor, the rotating speed can be regulated by itself, so that the rotating speeds of 2 ring frames are synchronous, and the adsorption position of the electromagnetic chuck on the roller is ensured to be consistent and consistent with the linear speed of the roller.

The control device functions: providing a direct current power supply, receiving the running speed of the conveyor, driving the driving motors of the two ring frames to rotate, powering on and off each electromagnetic chuck, reading the value of a tension sensor of each electromagnetic chuck, reading the state of each reset switch, displaying running conditions and parameters, communicating with an upper controller of the conveyor, and uploading and receiving information.

Spring stay wires, a tension sensor and a shrinkage storage space of electromagnet power wires are arranged on the placement grooves C1-Cn and the electromagnets B1-Bn.

The utility model not only can fix the conveyor belt to the roller for normal operation and monitor the operation condition of the conveyor belt, but also can detect the temperature of the roller and the conveyor belt at the roller end, the operation of the roller and the operation condition of the conveyor belt, and prevent corresponding faults.

Claims

1. A slip protection device for a conveyer belt comprises a ring frame (6), wherein C1-Cn placement grooves (5) are formed in the inner ring surface of the ring frame (6) along the circumferential direction, B1-Bn electromagnets (2) are arranged in the C1-Cn placement grooves (5), and the B1-Bn electromagnets (2) are matched with A1-An electromagnetic chucks (1); the ring frame (6) is obliquely sleeved on the roller (7) and the conveying belt (8), A1-An electromagnetic chucks (1) on the ring frame (6) are adsorbed on the roller (7) and press the conveying belt (8) between the electromagnetic chucks (1) and the roller, an included angle smaller than 90 degrees is formed between the cylindrical surface of the ring frame and the cylindrical surface of the roller, and the radius of the ring frame (6) is larger than the radius of the cylindrical surface of the roller (7).

2. The conveyor belt slip protection device of claim 1, wherein: the electromagnetic chuck (1) is connected with the electromagnet (2) through a flexible connector.

3. The conveyor belt slip protection device of claim 2, wherein: the flexible connector comprises a spring stay wire (3), and two ends of the spring stay wire (3) are respectively connected with the electromagnetic chuck (1) and the electromagnet (2).

4. A conveyor belt slip protection device as in claim 3 wherein: an electromagnet power line (4), a reset switch and a tension sensor (12) are also arranged between the electromagnetic chuck (1) and the electromagnet (2); E1-En tension sensors (12) are arranged on the spring stay wire (3).

5. The conveyor belt slip protection device of claim 4, wherein: the electromagnet (2) is inlaid and fixed at the bottom of the placement groove (5), and a tension sensor and a power line retraction storage hole (13) are arranged at the electromagnet (2) in the placement groove (5).

6. The conveyor belt slip protection device according to claim 1 or 2, characterized in that: the surface of the electromagnetic chuck (1) contacted with the roller (7) is made into a concave arc shape which is matched with the surface of the roller.

7. The conveyor belt slip protection device according to claim 1 or 2, characterized in that: the arrangement groove is rectangular and four frames are externally skimmed.