CN212862917U

CN212862917U - Belt feeder stifled protection device that changes

Info

Publication number: CN212862917U
Application number: CN202021771116.2U
Authority: CN
Inventors: 姚伏龙; 黄培燕
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2021-04-02
Anticipated expiration: 2030-08-24

Abstract

The utility model discloses a belt conveyor locked-rotor protection device, which comprises a proximity switch, an intelligent tachometer, an audible and visual alarm, a contactor, a power distribution cabinet, a conveyor belt and a conveying frame, wherein the conveying frame is formed by connecting a plurality of roller frames, the conveyor belt is laid on the conveying frame, and the driving roller drives the conveyor belt to run; the proximity switch is electrically connected with the input end of the intelligent tachometer, and the relay output end of the intelligent tachometer is respectively connected with the contactor and the audible and visual alarm; the contactor is connected into a control loop of the conveyor belt motor to control the on-off of a circuit where the motor is located; a telescopic rod is fixed on the rear side wall of the power distribution cabinet and is communicated with the power distribution cabinet, and a proximity switch is arranged at the free end of the telescopic rod; the device has simple system structure, low cost and stable and durable operation; the device is strong in equipment performance, can be suitable for (mounted on) most conveyor belts used and standby, and has no loss in the operation process due to a non-contact detection mode.

Description

Belt feeder stifled protection device that changes

Technical Field

The utility model relates to a mining machinery, concretely relates to belt feeder stalling protection device.

Background

Coal washing is an indispensable procedure for coal deep processing, coal directly mined from a mine is called raw coal, a plurality of impurities are mixed in the raw coal during mining, and the coal has different qualities, small internal ash content and large internal ash content which are mixed together. Coal washing is an industrial process of removing impurities in raw coal or classifying high-quality coal and low-quality coal, and is a coal processing plant called a coal preparation plant (or coal washing plant) which separates coal, removes mineral impurities in the raw coal and divides the raw coal into products with different specifications according to the physical and chemical properties of the coal. The main products are clean coal and middling coal, and in addition, byproducts such as gangue, coal slime and the like are also contained.

For coal dressing, the washing method mainly includes gravity coal dressing, floating coal dressing and special coal dressing. The common method is gravity coal separation, and is a method for separating coal and gangue mainly according to the density difference of the coal and the gangue. The density of coal is generally between 1.2 and 1.8, the density of gangue (stones mixed in a coal bed, containing a small amount of combustible substances and being difficult to burn; commonly called 'gangue') is generally above 1.8, and the coal and the gangue with different densities are separated by gravity in a coal separator. The gravity coal separation can be divided into jigging separation, dense medium separation, chute separation, table separation and the like.

In a coal washing plant, classified coal and gangue are conveyed in different directions by using a conveying belt, wherein a belt for conveying sundries such as the gangue is generally called as a sundry conveying belt, the gangue is different in size and high in density, and a belt is often clamped by large blocks of gangue in the conveying process, so that the belt is broken and worn; once the sundry conveying belt cannot work, production is affected, so that the coal preparation system is suspended, and the problems of pressure blockage, embolism and the like of coal flow in the conveying system are caused; the consequences of this problem not only increase the amount of labor for the maintenance workers, but also affect normal production. The accidents happen about 3 times every year, 1500 tons of raw coal are produced less each time according to 5 hours of influence on production, and in addition, the material cost and the labor cost are added, and more than 20 ten thousand yuan is lost every year.

Therefore, the device capable of timely detecting the abnormity of the sundry conveying belt is designed, and is very necessary for ensuring continuous normal production, reducing shutdown loss and reducing labor force.

Disclosure of Invention

The utility model aims to provide a belt conveyor locked-rotor protection device, which has simple system structure, low cost and stable and durable operation; the system is strong in equipment performance, can be suitable for (mounted on) most of belt conveyors used and standby, and has no loss in operation due to a non-contact detection mode.

A belt conveyor locked-rotor protection device comprises a proximity switch, an intelligent tachometer, an audible and visual alarm, a contactor, a power distribution cabinet, a conveyor belt and a conveying frame, wherein the conveying frame is formed by connecting a plurality of roller frames, the conveyor belt is laid on the conveying frame, and the driving roller drives the conveyor belt to run; the proximity switch is electrically connected with the input end of the intelligent tachometer, and the relay output end of the intelligent tachometer is respectively connected with the contactor and the audible and visual alarm; the contactor (normally closed contact) is connected into a control loop of the conveyor belt motor to control the on-off of a circuit where the motor is located;

a telescopic rod is fixed on the rear side wall of the power distribution cabinet and is communicated with the power distribution cabinet, and a proximity switch is arranged at the free end of the telescopic rod;

threading holes are formed in the left side and the right side of the power distribution cabinet, and heat dissipation holes are formed in the side wall of the power distribution cabinet and beside the wiring holes; an audible and visual alarm is arranged at the top of the power distribution cabinet;

the intelligent tachometer is arranged in the power distribution cabinet;

the bottom of the power distribution cabinet is provided with a connecting column, an L-shaped bent arm is arranged on the connecting column in an axially sliding manner, a cross rod is slidably arranged on the bent arm, and the cross rod penetrates through the bent arm; the front end of the cross rod is provided with a clamping jaw which is clamped on the conveying frame.

Preferably, the telescopic rod comprises an inner pipe and an outer pipe, the inner pipe is sleeved on the outer pipe, and a locking bolt is arranged at the position of the free end of the outer pipe in the radial direction.

Furthermore, the approach switch wiring is connected with the intelligent tachometer through the wiring on the inner side of the telescopic rod.

Further, the model of the proximity switch is PR30-15DN cylindrical direct current sensing type proximity switch.

Preferably, a power line for supplying power to the intelligent tachometer and a lead connected with the contactor penetrate through the threading holes respectively.

Preferably, the two ends of the bent arm are provided with fastening bolts along the radial direction, and the connecting column and the cross rod are screwed and fixed respectively.

Preferably, the intelligent tachometer is HB-96N in model number.

Preferably, telescopic link, horizontal pole are the pipe structure, and it not only can stretch out and draw back by length, can also rotate the adjustment.

The beneficial effects of the utility model reside in following:

first, owing to adopt non-contact detection mode, so the system does not have the loss in service, and is reliable and stable, has avoided contact detection system to adopt the phenomenon that rubber gyro wheel and belt contact often wear out gyro wheel and bearing completely to because contact tacho sensor is ordinary metal manufacturing, often corrosion card dies, just need change whole sensor every 3 months, change the tacho gyro wheel monthly, the cost is high, poor stability.

Secondly, material cost saving: each set of the complete system is more than 5 ten thousand yuan; and every set 575 yuan of this device, oneself installation and debugging do not have the human cost to the device is stable durable, and the practicality is strong.

And thirdly, the device is simple to maintain, and because the detection device is very simple and is as simple as one switch in a household to control one electric bulb, personnel with little electrical knowledge can maintain the device without needing to hire special technical personnel for maintenance every time, common technical personnel of the enterprise can carry out maintenance and repair by training a little, and a large amount of expenditure cost and time cost are saved for the enterprise in terms of maintenance and repair.

Fourthly, since the device is installed and used 11 months in 2019, the stalling accident is completely avoided, the stability is extremely high, and the device is not maintained until now since being used for most years. The production stability is ensured, the belt breakage accidents can be reduced for more than 3 times per year according to the washing quantity of 1000 tons per hour in a checkerboard well coal washing plant, the normal production is influenced by at least 5 hours each time, the influence time can be reduced for more than 15 hours per year, 1500 tons of raw coal can be produced, the labor cost and the material cost of manpower are reduced by more than 2 ten thousand yuan, and about 20 ten thousand yuan can be created per year.

Fifth, this application feasibility of implementation is stronger, can install on arbitrary conveyer belt position to can also carry out multi freedom adaptability according to actual place, equipment structure demand and adjust.

Sixth, this application in case detect the conveyer belt when being blocked, can shut down the conveyer belt at once to report to the police, thereby guarantee not by under the broken circumstances of wearing out at the conveyer belt, only need technical staff will plug up debris move can, whole processing procedure far than change the conveyer belt fast, be difficult for causing the structure to damage, can in time the loss, and do not the maloperation.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic diagram of the present invention.

Fig. 3 is a schematic view of the structure of the present invention.

Fig. 4 is a schematic end view of the proximity switch of the present invention located on the guide roller or idler.

Fig. 5 is a schematic view of the radial position of the proximity switch pointing to the guide roller or idler of the present invention.

In the drawing, a proximity switch 1, an intelligent tachometer 2, an audible and visual alarm 3, a power distribution cabinet 4, an expansion link 4-1, threading holes 4-2, heat dissipation holes 4-3, a connecting column 4-4, a bent arm 4-5, a cross rod 4-6, a clamping jaw 4-7, a conveyor belt 5, a conveying frame 6 and a guide roller 7.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Referring to fig. 1-5, the present application develops a belt conveyor stalling protection device, which mainly comprises a proximity switch 1, matched with an intelligent tachometer 2, and used for transmitting rotating speed data for the intelligent tachometer 2, wherein the model of the proximity switch 1 is a cylindrical direct current sensing type proximity switch PR30-15 DN; the intelligent tachometer 2 is HB-96N in model, the intelligent tachometer 2 can be compatible with two input signals of level pulse and switching value (the switching value input signal adopted by the application), and can also be set with two alarm values at will, and two relays independently output; the audible and visual alarm 3 is used for alarming and warning when the measured rotating speed is lower than a preset value; the contactor specifically adopts a normally closed contactor contact in the application, and when the rotating speed drops to a preset value, the conveyor belt 5 is blocked, so that the motor of the conveyor belt 5 is stopped immediately, and a worker can quickly process the blocked position; switch board 4, conveyer belt 5, transfer frame 6, wherein transfer frame 6 is formed by connecting a plurality of guide roll 7, and conveyer belt 5 is laid on transfer frame 6, is driven the drive belt operation by transfer frame 6.

The circuit connection mode in this application is: the proximity switch 1 is electrically connected with a (signal) input end of an intelligent tachometer 2 (the intelligent tachometer 2 belongs to a commercial product, and has a definite circuit connection method in the specification), and a contactor and an audible and visual alarm 3 are respectively connected with a relay output end of the intelligent tachometer 2; the contactor (not shown in the figure) is connected into a motor control loop of the conveyor belt 5 to control the on-off of a circuit where the motor is located; the specific working principle is as follows: the alarm speed of only the revolution meter is preset, when the conveying belt 5 normally works, the rotating speed of the conveying belt 5 is different from the preset value, an alarm cannot be generated, when the conveying belt 5 is clamped, the rotating speed of the conveying belt 5 can be reduced, the problem of speed falling is caused, when the speed falls to be matched with the preset value, only the relay output end of the revolution meter can be switched on, the audible and visual alarm 3 is controlled to work, meanwhile, the main loop is controlled to be switched off, the motor of the conveying belt 5 is stopped, and the conveying belt 5 is protected from being continuously abraded.

Based on the circuit, the specific hardware structure designed is as follows: the rear side wall of the power distribution cabinet is fixedly (welded) with a telescopic rod 4-1, the telescopic rod 4-1 is communicated with the power distribution cabinet, a free end of the telescopic rod 4-1 is provided with a proximity switch 1, the telescopic rod 4-1 (in a circular tube structure) comprises an inner tube and an outer tube, the inner tube is sleeved on the outer tube, a locking bolt is radially arranged at the position of the free end of the outer tube, and when the inner tube is adjusted to a proper length and a proper rotation angle, the inner tube is locked through the locking bolt.

Wherein, the left side and the right side (or the bottom side) of the power distribution cabinet are provided with threading holes 4-2, and a power line for supplying power to the intelligent tachometer 2 and a lead connected with the contactor are respectively penetrated through the threading holes 4-2; heat dissipation holes 4-3 are arranged beside the wiring holes on the side wall of the power distribution cabinet and used for dissipating heat generated by the intelligent tachometer 2 during working; an audible and visual alarm 3 is arranged at the top of the power distribution cabinet;

the intelligent tachometer 2 is arranged in the power distribution cabinet;

the bottom of the power distribution cabinet is welded with a connecting column 4-4, an L-shaped bent arm 4-5 is arranged on the connecting column 4-4 and can slide along the axial direction (namely up and down), a cross rod 4-6 is arranged on the bent arm 4-5 and can slide horizontally, and the cross rod 4-6 penetrates through the bent arm 4-5; the front end of the cross bar 4-6 is provided with a clamping jaw 4-7, and the clamping jaw 4-7 is clamped on the conveying frame 6. Meanwhile, fastening bolts are arranged at two ends of the bent arm 4-5 along the radial direction, the connecting column 4-4 and the cross rod 4-6 are respectively screwed and fixed, and after the position is adjusted, the connecting column and the cross rod are locked and fixed by the fastening bolts.

When the wiring is carried out, due to the tubular structure adopted by the telescopic rod 4-1, the flat cable is required to be moved along the inside of the telescopic rod 4-1 when the wiring is carried out, so that the flat cable is prevented from being exposed in the air as much as possible and is easily weathered by wind and sunlight. But also the lines are easily broken by stones falling from the mine.

When the intelligent rotating speed meter is implemented, the proximity switch 1 is arranged on the guide roller, then a circle of protrusions are welded on the guide roller and close to the proximity switch 1, the number of the circle of protrusions is six, when the guide roller rotates, the proximity switch 1 can measure switching value data, the data are transmitted to the intelligent rotating speed meter 2 (note that the intelligent rotating speed meter 2 of the type can be matched with the proximity switch 1), and whether the acousto-optic alarm and the motor of the conveyor belt 5 work or not is controlled through the measured data.

Referring to fig. 4, the proximity switch 2 in the present application can also be implemented by being installed on the end surface of the tail guide roller or the towing roller, wherein the proximity switch 2 is parallel to the tail guide roller or the towing roller.

Referring to fig. 5, the proximity switch 2 of the present application can also be implemented by being installed on the end surface of the tail guide roller or the towing roller, wherein the proximity switch 2 is perpendicular to the tail guide roller or the towing roller and faces in the radial direction.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. A belt conveyor locked-rotor protection device comprises a proximity switch, an intelligent tachometer, an audible and visual alarm, a contactor, a power distribution cabinet, a conveyor belt and a conveying frame, wherein the conveying frame is formed by connecting a plurality of roller frames, the conveyor belt is laid on the conveying frame, and the driving roller drives the conveyor belt to run; the method is characterized in that: the proximity switch is electrically connected with the input end of the intelligent tachometer, and the relay output end of the intelligent tachometer is respectively connected with the contactor and the audible and visual alarm; the contactor is connected into a control loop of the conveyor belt motor to control the on-off of a circuit where the motor is located;

threading holes are formed in the left side and the right side of the power distribution cabinet, and heat dissipation holes are formed in the sides of wiring holes in the side wall of the power distribution cabinet; an audible and visual alarm is arranged at the top of the power distribution cabinet;

the intelligent tachometer is arranged in the power distribution cabinet;

2. The belt feeder locked rotor protection device of claim 1, characterized in that: the telescopic rod comprises an inner pipe and an outer pipe, the inner pipe is sleeved on the outer pipe, and a locking bolt is arranged at the position of the free end of the outer pipe in the radial direction.

3. The belt feeder locked rotor protection device of claim 2, characterized in that: the proximity switch wiring is connected with the intelligent tachometer through the wiring on the inner side of the telescopic rod.

4. The belt feeder locked rotor protection device of claim 3, characterized in that: the model of the proximity switch is PR30-15DN cylindrical direct current sensing type proximity switch.

5. The belt feeder locked rotor protection device of claim 1, characterized in that: and a power line for supplying power to the intelligent tachometer and a lead connected with the contactor penetrate through the threading hole respectively.

6. The belt feeder locked rotor protection device of claim 1, characterized in that: and fastening bolts are arranged at two ends of the bent arm along the radial direction and are used for screwing and fixing the connecting column and the cross rod respectively.

7. The belt feeder locked rotor protection device of claim 1, characterized in that: the model of the intelligent tachometer is HB-96N.

8. The belt conveyor stalling protection device of any one of claims 1-7, wherein: the telescopic rod and the cross rod are of circular tube structures, and can be adjusted in a length telescopic mode and a rotary mode.