CN218908807U - Colliery coal flow speed governing system - Google Patents
Colliery coal flow speed governing system Download PDFInfo
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- CN218908807U CN218908807U CN202223255971.XU CN202223255971U CN218908807U CN 218908807 U CN218908807 U CN 218908807U CN 202223255971 U CN202223255971 U CN 202223255971U CN 218908807 U CN218908807 U CN 218908807U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
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Abstract
The utility model belongs to the technical field of underground coal mine electromechanical design, and particularly provides a coal mine coal flow speed regulating system which comprises a PLC control box, a reversed loader and a plurality of belt conveyors, wherein the reversed loader and the belt conveyors are arranged along the coal flow direction; the belt conveyor is provided with a belt; the coal flow inclination angle sensor is respectively arranged at the position of the feeding hole of the reversed loader and the position above the belt conveyor, which is at a set distance from the belt machine head; the coal flow inclination sensor and the belt conveyor are both connected with the PLC control box; the coal flow inclination sensor is connected with a coal quantity detection device, and the coal quantity detection device is contacted with the coal flow on the belt. The belt speed of the belt conveyor can be automatically regulated according to the actual coal flow, so that the belt speed of the belt conveyor can be automatically reduced under no-load and light-load conditions, the full-load speed can be automatically increased, the loss of the belt, the carrier roller and the like can be reduced, and the purpose of saving energy consumption can be achieved. The application of the system is helpful for improving the intelligent construction level of the coal mine transportation system.
Description
Technical Field
The utility model belongs to the technical field of underground coal mine electromechanical design, relates to an underground coal mine raw coal transportation monitoring system, and particularly provides a coal mine coal flow speed regulating system.
Background
Coal is taken as main energy source in China, raw coal transportation is an important link of coal mining, and at present, coal transportation equipment mainly adopts a belt conveyor, has the technical advantages of large transportation capacity, long transportation distance, high belt speed and high power, and has been widely applied to various coal enterprises in China. Along with the continuous development of scientific technology, the coal mine conveyor is being changed from single machine control to centralized control, automatic control and intelligent control, the conveyor driving mode is being changed from motor fixed frequency driving to variable frequency driving mode, and various belt conveyor protection sensors such as a coal pile sensor, an automatic sprinkling protection sensor, a low-speed protection sensor, a smoke protection sensor, an overtemperature protection sensor, an anti-deviation sensor, a line emergency stop device, an anti-tearing protection device and other belt eight protection sensors are researched, developed and applied, and the effect is good. But most of the prior variable frequency belt conveyors adopt full-speed operation or frequency modulation constant-speed operation, and mainly have the following technical defects:
(1) The belt frequency converter only plays a soft start role, and the belt speed is not automatically adjusted in real time according to the belt load condition, so that the belt conveyor is always in a high-speed running state, and parts such as a belt and a carrier roller are seriously worn.
(2) When the belt is in light load or no load, the belt conveyor always keeps high-speed operation, so that the abrasion of a mechanical transmission system is serious, the service lives of the belt and matched equipment are shortened, a large amount of electric energy is wasted, and the energy conservation and consumption reduction are not facilitated.
(3) The frequency modulation constant speed operation has certain flexibility, and the speed can be adjusted according to different traffic requirements, but is not suitable for a coal mine crossheading belt conveying system with large change of conveying capacity.
Disclosure of Invention
Aiming at the defects of full-speed operation or frequency modulation constant-speed operation of most of the prior variable-frequency belt conveyors, the utility model provides a coal mine coal flow speed regulating system.
The technical scheme of the utility model provides a coal mine coal flow speed regulating system which comprises a PLC control box, a reversed loader and a plurality of belt conveyors, wherein the reversed loader and the belt conveyors are arranged along the coal flow direction; the belt conveyor is provided with a belt;
the coal flow inclination angle sensor is respectively arranged at the position of the feeding hole of the reversed loader and the position above the belt conveyor, which is at a set distance from the belt machine head;
the coal flow inclination sensor and the belt conveyor are both connected with the PLC control box;
the coal flow inclination sensor is connected with a coal quantity detection device, and the coal quantity detection device is contacted with the coal flow.
As one preferable mode of the technical scheme of the utility model, the coal flow inclination sensor is connected with the PLC control box through a signal transmission line.
As one preferable mode of the technical scheme of the utility model, the upper end of the coal flow inclination sensor is provided with an inclination detecting element for sensing the load of the belt conveyor.
As one preferable choice of the technical scheme of the utility model, the coal quantity detecting device is a flexible coal quantity detecting device;
the coal flow inclination sensor is vertically arranged above the center of the belt conveyor through a damping rotating shaft device;
the bottom of the coal flow inclination sensor is connected with a flexible coal quantity detection device.
As one preferable choice of the technical scheme of the utility model, the flexible coal amount detection device is 30mm-50mm away from the belt surface of the belt conveyor.
As one preferable choice of the technical scheme of the utility model, the number of the belt conveyors is three, namely a first belt conveyor, a second belt conveyor and a third belt conveyor;
a third belt conveyor is arranged below the discharge port of the reversed loader, a second belt conveyor is arranged below the belt head of the third belt conveyor, and a first belt conveyor is arranged below the belt head of the second belt conveyor;
the vertical distance between the tail of the third belt conveyor and the discharge port of the reversed loader is a first threshold;
the vertical distance between the tail of the second belt conveyor and the belt head of the third belt conveyor is a second threshold value;
the vertical distance between the tail of the first belt conveyor and the head of the second belt conveyor is a third threshold value.
As one preferable mode of the technical scheme of the utility model, each belt conveyor is connected with a frequency converter, and the frequency converters are connected with a PLC control box.
The belt conveyor speed regulation control system has the advantages that the belt conveying capacity data are collected by the coal flow inclination sensor, the belt conveying system is controlled in a centralized mode by the PLC control box, a set of low-cost intelligent crossheading belt speed regulation control system is formed, automatic regulation of the belt speed of the belt conveyor according to actual coal flow can be achieved, accordingly automatic reduction of the belt speed in idle load and light load of the belt conveyor is achieved, full-load automatic speed rising is achieved, loss of the belt, carrier rollers and the like is reduced, and the purpose of saving energy consumption is achieved. The application of the system is helpful for improving the intelligent construction level of the coal mine transportation system.
From the above technical scheme, the utility model has the following advantages:
(1) The intelligent coal flow speed regulating system of the coal mine is simple, the intelligent coal flow sensor can be connected into the PLC control box nearby to realize speed regulation, and the intelligent coal flow speed regulating system is suitable for a transportation system taking the PLC as a control core.
(2) The intelligent coal flow speed regulating system of the coal mine is very reliable in operation, the core inclination angle detection technology of the coal flow sensor is very mature, 4-20mA signals of the coal flow inclination angle sensor are acquired through the PLC control box, and the system is very stable.
(3) The underground coal flow can automatically adjust the belt speed according to the load condition of the belt, reduces the abrasion of related parts such as the belt, the carrier roller and the like, and prolongs the service lives of the belt conveyor and the belt.
(4) The utility model can effectively reduce the idle load and light load running time of the belt conveyor, saves electric energy and is beneficial to energy conservation and consumption reduction.
(5) By the application of the utility model, the operation failure times of the belt conveyor are obviously reduced, the number of belt maintenance workers is reduced, and the reduction of human efficiency is facilitated.
In addition, the utility model has reliable design principle, simple structure and very wide application prospect.
It can be seen that the present utility model has outstanding substantial features and significant advances over the prior art, as well as its practical advantages.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a system according to one embodiment of the utility model.
In the figure, a 1-PLC control box, a 2-signal transmission line, a 3-coal flow inclination angle sensor, a 4-flexible coal amount detection device, a 5-third belt conveyor, a 6-belt machine head, a 7-belt machine tail, an 8-second belt conveyor, a 9-first belt conveyor and a 10-transfer conveyor are arranged.
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
As shown in fig. 1, an embodiment of the present utility model provides a coal mine coal flow speed regulation system, which includes a PLC control box 1, a reversed loader 10 arranged along a coal flow direction, and a plurality of belt conveyors; the belt conveyor is provided with a belt;
the coal flow inclination sensor 3 is respectively arranged at the position of the feed inlet of the reversed loader 10 and the position above the belt conveyor, which is at a set distance from the belt machine head;
the coal flow inclination sensor 3 and the belt conveyor are both connected with the PLC control box 1;
the coal flow inclination sensor 3 is connected with a coal quantity detection device, and the coal quantity detection device is contacted with the coal flow on the belt.
In some embodiments, the coal flow inclination sensor 3 is connected with the PLC control box 1 through a signal transmission line 2.
In some embodiments, the upper end of the coal flow inclination sensor 3 is provided with an inclination detecting element for sensing the load of the belt conveyor.
In some embodiments, the coal amount detection device is a flexible coal amount detection device 4;
the coal flow inclination sensor 3 is vertically arranged above the center of the belt conveyor through a damping rotating shaft device;
the bottom of the coal flow inclination sensor 3 is connected with a flexible coal quantity detecting device 4.
In some embodiments, the flexible coal amount detection device 4 is 30mm-50mm from the belt surface of the belt conveyor.
In some embodiments, the number of the belt conveyors is three, namely a first belt conveyor 9, a second belt conveyor 8 and a third belt conveyor 5;
a third belt conveyor 5 is arranged below a discharge hole of the reversed loader 10, a second belt conveyor 8 is arranged below a belt head 6 of the third belt conveyor 5, and a first belt conveyor 9 is arranged below the belt head of the second belt conveyor 8;
the vertical distance between the tail 7 of the third belt conveyor 5 and the discharge port of the reversed loader 10 is a first threshold value;
the vertical distance between the tail of the second belt conveyor 8 and the belt head of the third belt conveyor 5 is a second threshold value;
the vertical distance between the belt conveyor tail of the first belt conveyor 9 and the belt conveyor head of the second belt conveyor 8 is a third threshold value. Here, the first threshold value, the second threshold value, and the third threshold value may be set according to the actual coal transport amount, and may take the same or different values.
In some embodiments, each belt conveyor is connected with a frequency converter, and the frequency converter is connected with the PLC control box 1.
The working principle is as follows: when the system is started, belt conveying equipment is started according to the reverse coal flow sequence, all the equipment operates at the rated speed, and the belt carbon deposit is emptied.
After the system is started, the initial running speed of the belt of the third belt conveyor 5 is determined by acquiring the speed of the coal conveyor on the working surface, the speed of the transfer conveyor and the load current condition, judging the coal quantity in advance, the transfer conveyor 10 runs at the power frequency all the time, verifying whether the coal quantity is consistent with the initial speed determined by a data model by installing a coal flow inclination sensor 3 near the feeding port of the transfer conveyor, correcting the belt speed according to the data of the coal flow inclination sensor 3 when the coal quantity is not consistent with the initial speed determined by the data model, realizing the belt speed regulation of the belt of the third belt conveyor 5 by a PLC control box 1, installing the coal flow inclination sensor at the position 20-30 m forward (can be determined according to the maximum belt speed and the speed regulation time) of the belt head 6 of the third belt conveyor 5, detecting the coal quantity of the belt of the third belt conveyor 5 and controlling the belt speed of the second belt conveyor 8 by the PLC control box 1, and so on.
The specific implementation mode of the coal mine coal flow speed regulating system is as follows:
(1) The coal flow inclination sensor 3 is vertically arranged above the center of the belt conveyor through the damping rotating shaft device, an inclination detecting element is arranged at the upper end of the coal flow inclination sensor and is used for sensing the load condition of the belt conveyor, the bottom of the coal flow inclination sensor 3 is connected with a flexible coal quantity detecting device 4 (a waste belt or a steel wire rope can be utilized) which is 30mm-50mm away from the belt surface of the belt conveyor, and the damping rotating shaft device and the flexible coal quantity detecting device 4 can effectively reduce the wide fluctuation of angles caused by lump coal.
(2) The coal flow inclination sensor 3 is connected with the PLC control box 1 through a signal transmission line 2.
(3) When the working face is normally produced, the flexible coal quantity detecting device 4 is contacted with coal flow to generate an angle change signal, the signal is transmitted to the PLC control box 1 through the coal flow inclination angle sensor 3 and the signal transmission line 2, and the larger the coal quantity is, the larger the inclination angle is, the coal flow sensor outputs a 4-20mA current signal to the PLC control box 1 according to the inclination angle detected in real time.
(4) The PLC control box 1 analyzes according to the received signals and a mathematical model established in advance and sends out a control command to control the variable frequency adjustment quantity of the frequency converter of the next belt conveyor so as to adjust the required running speed before the coal flow arrives.
(5) The PLC control box 1 outputs four instructions of high speed, medium speed, low speed and idle speed according to the magnitude of the dip angle, and can directly control the frequency converter or control the frequency converter to carry out belt conveyor speed regulation through the PLC in the next-stage frequency conversion control box, and the PLC control box 1 directly controls the frequency converter to carry out belt conveyor speed regulation in the application.
Although the present utility model has been described in detail by way of preferred embodiments with reference to the accompanying drawings, the present utility model is not limited thereto. Various equivalent modifications and substitutions may be made in the embodiments of the present utility model by those skilled in the art without departing from the spirit and scope of the present utility model, and it is intended that all such modifications and substitutions be within the scope of the present utility model/be within the scope of the present utility model as defined by the appended claims. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (7)
1. The coal flow speed regulating system for the coal mine is characterized by comprising a PLC control box, a reversed loader and a plurality of belt conveyors, wherein the reversed loader and the plurality of belt conveyors are arranged along the coal flow direction; the belt conveyor is provided with a belt;
the coal flow inclination angle sensor is respectively arranged at the position of the feeding hole of the reversed loader and the position above the belt conveyor, which is at a set distance from the belt machine head;
the coal flow inclination sensor and the belt conveyor are both connected with the PLC control box;
the coal flow inclination sensor is connected with a coal quantity detection device, and the coal quantity detection device is contacted with the coal flow on the belt.
2. The coal mine coal flow speed regulating system according to claim 1, wherein the coal flow inclination sensor is connected with the PLC control box through a signal transmission line.
3. The coal mine coal flow speed regulating system according to claim 2, wherein the upper end of the coal flow inclination sensor is provided with an inclination detecting element for sensing the load of the belt conveyor.
4. A coal mine coal flow speed regulation system as claimed in claim 3, wherein the coal quantity detection device is a flexible coal quantity detection device;
the coal flow inclination sensor is vertically arranged above the center of the belt conveyor through a damping rotating shaft device;
the bottom of the coal flow inclination sensor is connected with a flexible coal quantity detection device.
5. The coal mine coal flow speed regulating system of claim 4, wherein the flexible coal amount detecting device is 30mm-50mm away from the belt surface of the belt conveyor.
6. The coal mine coal flow speed regulating system according to claim 1, wherein the number of the belt conveyors is three, namely a first belt conveyor, a second belt conveyor and a third belt conveyor;
a third belt conveyor is arranged below the discharge port of the reversed loader, a second belt conveyor is arranged below the belt head of the third belt conveyor, and a first belt conveyor is arranged below the belt head of the second belt conveyor;
the vertical distance between the tail of the third belt conveyor and the discharge port of the reversed loader is a first threshold;
the vertical distance between the tail of the second belt conveyor and the belt head of the third belt conveyor is a second threshold value;
the vertical distance between the tail of the first belt conveyor and the head of the second belt conveyor is a third threshold value.
7. The coal mine coal flow speed regulating system according to claim 1, wherein each belt conveyor is connected with a frequency converter, and the frequency converters are connected with a PLC control box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223255971.XU CN218908807U (en) | 2022-12-02 | 2022-12-02 | Colliery coal flow speed governing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223255971.XU CN218908807U (en) | 2022-12-02 | 2022-12-02 | Colliery coal flow speed governing system |
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| Publication Number | Publication Date |
|---|---|
| CN218908807U true CN218908807U (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223255971.XU Active CN218908807U (en) | 2022-12-02 | 2022-12-02 | Colliery coal flow speed governing system |
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| CN (1) | CN218908807U (en) |
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- 2022-12-02 CN CN202223255971.XU patent/CN218908807U/en active Active
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