CN217172141U

CN217172141U - Special anti-blocking system for elevator

Info

Publication number: CN217172141U
Application number: CN202220674344.0U
Authority: CN
Inventors: 鞠全胜; 罗朋; 王富生; 罗作明; 庾敏; 吴有林
Original assignee: Sichuan Aonong Biotechnology Co ltd; Liaoning Aonong Feed Co ltd
Current assignee: Sichuan Aonong Biotechnology Co ltd; Liaoning Aonong Feed Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-08-12
Anticipated expiration: 2032-03-25

Abstract

The utility model relates to a lifting machine, in particular to a special anti-blocking system for a lifting machine, which comprises a lifting machine and a feeding device connected with the feeding part of the lifting machine, wherein the lifting machine is electrically connected with a current detection device for measuring the current of the lifting machine on a power supply path, and the feeding device is provided with a frequency conversion device for controlling the feeding speed of the feeding device; and the frequency conversion device controls the feeding speed of the feeding equipment according to the current of the hoister detected by the current detection device. Compared with the prior art, the utility model realizes the automatic regulation and control of the feeding speed of the feeding equipment according to different working states of the hoister, prevents the material from being blocked and caked, and further improves the product quality; the hoister can continuously work in a full-load state without overload machine plugging, potential safety hazards of machine plugging are eliminated, and energy is saved and consumption is reduced for the production process.

Description

Special anti-blocking system for elevator

Technical Field

The utility model relates to a lifting machine, concretely relates to special anti-blocking system of lifting machine.

Background

The hoister (well lifting conveyor/Elevator) is large mechanical equipment for transportation by changing potential energy, such as a mine hoist, a dam-crossing hoist and the like, is mainly suitable for continuous vertical hoisting of powdery, granular and small materials, and can be widely applied to hoisting of bulk materials of feed mills, flour mills, rice mills, oil mills, starch mills, grain depots, port wharfs and the like in various scales.

Grain, feed processing enterprise adopt the lifting machine mode of delivery usually, nevertheless because the material characteristic of the material of carrying is inconsistent, promotes and prevents stifled upper reaches feeding equipment and generally fix in certain extent, leads to the lifting efficiency inconsistent, appears the phenomenon that the material blockked up, caking often, also extravagant energy consumption. What accomplish among the prior art is that go to fixed upstream feeding equipment productivity according to the current that lifting power set for, however in general processing enterprise, same lifting machine usually can be used for carrying multiple material, but the majority is according to the heaviest material to set for the current that matches lifting machine power, leads to often not reaching the productivity when other materials promote, causes the energy consumption extravagant.

Chinese patent CN201811013652.3 discloses a bucket elevator with anti-blocking device, including the elevator shell, be provided with the cylinder in the elevator shell, the quantity of cylinder is two and sets up both ends about the elevator shell is inside respectively, be provided with the conveyer belt between the cylinder, be provided with the hopper on the conveyer belt, elevator shell lower part one side is provided with the feed inlet, elevator shell upper portion opposite side is provided with the discharge gate, be provided with feed hopper on the feed inlet, be provided with anti-blocking device between feed inlet and the feed hopper, anti-blocking device includes valve and electric putter, the valve setting is between feed inlet and feed hopper, electric putter sets up at the valve rear end, drive the valve switch through electric putter. This bucket elevator is through closing the emergence that the putty was alleviated to the feeding when taking place the putty near, but closes the feeding and probably need stop the continuous feed of feeder equipment, and then can influence the function of each equipment in upper reaches, very unfavorable to continuous processing production's control to frequently open and stop life-span and the performance that also can influence the device, and the production efficiency of production line, be unfavorable for production.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving above-mentioned problem at least one of which and provide a special stifled system of preventing of lifting machine, realized the automatic feed speed who regulates and control the feeding equipment according to the different operating condition of lifting machine, avoided the material to block up, agglomerate to make the lifting machine continuously work in full load state and can not overload stifled quick-witted, eliminate the potential safety hazard of stifled quick-witted and for production technology energy saving and consumption reduction.

The purpose of the utility model is realized through the following technical scheme:

a special anti-blocking system for a lifter comprises the lifter and feeding equipment connected to the feeding position of the lifter, wherein the lifter is electrically connected with a current detection device for measuring the current of the lifter on a power supply path, and the feeding equipment is provided with a frequency conversion device for controlling the feeding speed of the feeding equipment;

and the frequency conversion device controls the feeding speed of the feeding equipment according to the current of the hoister detected by the current detection device. By detecting the working current of the elevator, the operating power of the elevator can be calculated according to the condition that P is UI, and the operating power is compared with the rated power (or can be directly compared with the rated current under the condition that the voltage is consistent), so that whether the elevator is in a full load (non-overload or low-load) state or not can be known, the feeding speed of upstream feeding equipment can be adjusted to enable the elevator to normally operate at the full load, and the production efficiency can be effectively improved on the premise of ensuring safe production.

Preferably, the current detection device comprises a current monitoring meter or a current sensor.

Preferably, the detection range of the current detection device is +/-20-40% of the set current of the hoisting machine. The current detection range in a larger range can well detect whether the elevator is in a full load state; meanwhile, 20-40% can provide enough sensitivity to prevent the situation that the machine is not detected even if the machine is blocked.

Preferably, the frequency conversion device comprises a frequency converter or a frequency conversion speed regulator. The frequency conversion device adopts a mode of gradually accelerating and decelerating when acting, can relieve the problem caused by sudden change, and is beneficial to industrial production.

Preferably, the lower limit of the feeding speed of the feeding device controlled by the frequency conversion device is 0.5-0.7 times of the set speed, and the upper limit of the feeding speed is 1.2-1.4 times of the set speed. The downward adjustable range (the feeding speed is reduced) is larger, so that safety accidents caused by machine blockage can be more effectively prevented or even eliminated; meanwhile, a certain upward adjustable range (feeding speed lifting) can be provided, a certain adjustable space can be provided when the hoister is under a low load, and the production efficiency is improved.

Preferably, the feeding device includes, but is not limited to, a scraper, a belt conveyor or an auger. The system is only provided with the frequency conversion device for regulating and controlling the feeding speed on the feeding equipment, and does not relate to the structure of the feeding equipment, so that theoretically all feeding equipment capable of being matched with the elevator can be regulated and controlled by adopting the mode provided by the system.

Preferably, the lifter is a bucket lifter.

Preferably, the elevator comprises a belt-driven bucket elevator or a chain-driven bucket elevator. The system is only provided with a current detection device for detecting current on the hoisting machine, so that the system can be used for all hoisting machines in theory.

Preferably, the special anti-blocking system for the elevator further comprises an automatic control device, and the automatic control device is electrically connected with the current detection device and the frequency conversion device respectively. The full-automatic control of the elevator system can be realized through the automatic control device, the regulation and control are more timely, and the control effect is more effective.

Preferably, the automatic control device is a PLC controller or a PLC control cabinet. The PLC controller or the PLC control cabinet is a programmable controller or a control cabinet, and the application range and the application condition can be further expanded through programming.

The utility model discloses a theory of operation does:

when the hoisting machine works, the current detection device detects the working current of the hoisting machine, converts the detected working current into working power (through conversion of P to UI) and then compares the working power with the rated power (when the voltage is the same, the working current can be directly compared with the rated current); when the comparison shows that the hoister runs in an overload state, the feeding speed of the feeding equipment is reduced through the frequency conversion device, so that the hoister is restored to a full-load state to prevent the machine from being blocked; when the comparison shows that the hoister operates at low load, the feeding speed of the feeding equipment is accelerated through the frequency conversion device, so that the hoister approaches or reaches a full-load state to improve the production efficiency.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses an installation current detection device on the lifting machine, installation frequency conversion equipment on the feeding equipment, through linkage between them, can make the lifting machine be in or be close to full load state, and can not overload, can effectively avoid the material to block up the caking, the emergence of stifled quick-witted accident, simultaneously, can improve holistic product quality and production efficiency. Whether the power (current) of the elevator reaches the full load or not is automatically detected in real time by a current detection device on the elevator, the elevator is automatically controlled through a frequency conversion device on the upstream feeding equipment, the monitoring is more comprehensive and thorough, the feeding speed of the upstream feeding equipment is reasonably controlled, the potential safety hazard of the elevator blockage can be completely eradicated, and the product quality and the production efficiency are improved.

2. Since the hoisting machine in a conventional plant may be used for the hoisting of a plurality of materials, each material having different properties and different properties, the hoisting machine will run full load with different power for the hoisting of different materials. The utility model discloses a current of real-time supervision lifting machine can be adapted to the regulation and control of various material promotion in-process with the feed rate of adjusting feeding equipment. The current/power is directly detected in the regulation and control process, and the regulation and control process is not influenced by the material properties.

3. The utility model discloses can directly reform transform on original production line, and easily reform transform, prevent stifled quick-witted effect excellent, easy and simple to handle can automize, is suitable for the industry and popularizes and applies.

4. Through the set power value of the elevator, the feeding rhythm of upstream equipment is controlled, the feeding capacity of different materials is matched, full-load operation is achieved under the condition that the elevator is not blocked completely, the operation safety is guaranteed, no risk exists, the energy conservation and consumption reduction of enterprise operation management are guaranteed, and enterprise benefits are met.

Drawings

FIG. 1 is a schematic structural view of the anti-blocking system for a hoist of the present invention;

in the figure: 1-a hoisting machine; 2-feeding equipment; 3-a current detection device; 4-a frequency conversion device; 5-automatic control device.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Examples

A special anti-blocking system for a hoist 1 is shown in figure 1 and comprises a hoist 1 and a feeding device 2 connected to the feeding part of the hoist 1, wherein the hoist 1 is electrically connected with a current detection device 3 for measuring the current of the hoist 1 on a power supply path, and the feeding device 2 is provided with a frequency conversion device 4 for controlling the feeding speed of the feeding device 2;

the frequency conversion device 4 controls the feeding speed of the feeding equipment 2 according to the current of the hoisting machine 1 detected by the current detection device 3.

More specifically, in the present embodiment:

the elevator 1 is an existing traditional bucket elevator 1, specifically is a belt-driven bucket elevator 1 (belt-driven bucket elevator 1), and a current detection device 3 which is electrically connected with a power supply path of the elevator 1 and is used for detecting the current of the elevator 1 is installed on the side edge of the elevator; the feeding device 2 is a conventional belt conveyor, and a frequency conversion device 4 which is electrically connected with the feeding device 2 and is used for frequency conversion of the feeding device 2 is arranged on the side edge of the feeding device 2; the current detection device 3 adopts a simple and readable current monitoring table, and the current measurement range is +/-30% of the set current of the elevator 1 (according to the actual requirement, the current measurement range can be +/-20%, +/-40%, +/-35% or +/-25% and the like in other embodiments); the frequency conversion device 4 adopts a frequency conversion speed changer which is easy to operate and install, and the adjustable speed range is 0.5-1.4 times (according to actual requirements, the adjustable speed range can also be set to be 0.6-1.2 times, 0.7-1.2 times, 0.65-1.25 times or 0.5-1.3 times) of the feeding speed of the feeding device 2.

By detecting the working current of the elevator 1, the operating power of the elevator can be calculated according to the condition that P is UI, and the operating power is compared with the rated power (or can be directly compared with the rated current under the condition that the voltage is consistent), so that whether the elevator is in a full load (non-overload or low-load) state can be known, the feeding speed of the upstream feeding equipment 2 can be adjusted to enable the elevator 1 to normally operate at the full load, and the product quality and the production efficiency can be effectively improved on the premise of ensuring safe production.

In addition, in order to further improve the automation degree and the control performance of the system, the automatic control device 5 is additionally arranged to perform the automatic control of the system. The automatic control device 5 is electrically connected to the current detection device 3 and the frequency conversion device 4 (shown in dashed lines in fig. 1) via electrical signals (wires) for regulating the feeding speed of the feeding apparatus 2 so that the elevator 1 can be kept in full load operation. The automatic control device 5 adopts a PLC control cabinet (in other embodiments, the automatic control devices 5 with different types and different functions can be selected according to actual conditions), and can be programmed automatically according to actual conditions of a factory to meet the requirements of various conditions.

Suppose that: the elevator 1 sets the rated power to 15A according to the corn which is the common transportation raw material, and sets the feeding speed of the feeding device 2 according to the rated power (here, taking a certain production line of a certain production workshop as an example, the selected parameters and parameter ranges are only taken as example references, and the actual parameters can be set and adjusted according to the production conditions). Adopt the working method of fixed feed speed among the prior art, when this lifting machine 1 carried other raw materialss heavier than the maize, feeding device 2 of upper reaches can't effective control, leads to lifting machine 1 to surpass its own current load, therefore can arouse the material to block up, causes stifled machine. After the special anti-blocking system is installed, the feeding speed of the feeding equipment 2 is changed to change according to the current of the elevator 1; when the current detection device 3 detects that the current of the hoister 1 exceeds 15A, the automatic control device 5 can reduce the feeding speed of the upstream feeding equipment 2 through the frequency conversion device 4 so as to restore the feeding speed to 15A; when the current detects that the current of the hoisting machine 1 is lower than 12A (within the range of 12-15A, the hoisting machine 1 is basically in a full load state, and a range is set to prevent the feeding speed of the feeding equipment 2 from being in a variation state all the time and influencing production), the automatic control device 5 accelerates the feeding speed of the upstream feeding equipment 2 through the frequency conversion device 4 so as to enable the feeding speed to be recovered to 15A. Therefore, the full load of the hoister 1 can be kept when materials with different weights are hoisted safely and efficiently, energy waste is reduced, and efficiency is improved.

The utility model discloses a theory of operation does:

when the hoisting machine 1 is operated, the current detection device 3 detects the operating current of the hoisting machine 1, converts the detected operating current into operating power (i.e., by conversion from P to UI), and compares the operating power with the rated power (when the voltage is the same, the operating power may be directly compared with the rated current); when the comparison shows that the hoister 1 runs in an overload state, the frequency conversion device 4 is used for slowing down the feeding speed of the feeding equipment 2 so as to enable the hoister 1 to recover to a full-load state to prevent machine blockage; when the comparison shows that the hoister 1 runs at low load, the frequency conversion device 4 accelerates the feeding speed of the feeding equipment 2, so that the hoister 1 approaches or reaches a full-load state to improve the production efficiency.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.

Claims

1. The special anti-blocking system for the elevator comprises the elevator (1) and feeding equipment (2) connected to the feeding position of the elevator (1), and is characterized in that the elevator (1) is electrically connected with a current detection device (3) for measuring the current of the elevator (1) on a power supply path, and a frequency conversion device (4) for controlling the feeding speed of the feeding equipment (2) is installed on the feeding equipment (2);

and the frequency conversion device (4) controls the feeding speed of the feeding equipment (2) according to the current of the hoisting machine (1) detected by the current detection device (3).

2. The special anti-blocking system for the hoisting machine as claimed in claim 1, wherein the current detection device (3) comprises a current monitoring meter or a current sensor.

3. The special anti-blocking system for the hoisting machine as claimed in claim 2, wherein the detection range of the current detection device (3) is ± 20-40% of the set current of the hoisting machine (1).

4. The anti-blocking system special for the elevator as claimed in claim 1, wherein the frequency conversion device (4) comprises a frequency converter or a frequency conversion speed regulator.

5. The special anti-blocking system for the elevator as claimed in claim 4, wherein the frequency conversion device (4) controls the feeding speed of the feeding device (2) to have a lower limit of 0.5-0.7 times and an upper limit of 1.2-1.4 times of the set speed.

6. The anti-blocking system special for the elevator as claimed in claim 1, wherein the feeding device (2) comprises a scraper, a belt conveyor or an auger.

7. The special anti-blocking system for the hoisting machine as claimed in claim 1, wherein the hoisting machine (1) is a bucket elevator.

8. The anti-blocking system special for the hoisting machine as claimed in claim 7, wherein the hoisting machine (1) comprises a belt-driven bucket elevator or a chain-driven bucket elevator.

9. The special anti-blocking system for the hoisting machine as claimed in claim 1, further comprising an automatic control device (5), wherein the automatic control device (5) is electrically connected with the current detection device (3) and the frequency conversion device (4) respectively.

10. The special anti-blocking system for the elevator as claimed in claim 9, wherein the automatic control device (5) is a PLC controller or a PLC control cabinet.