CN217637626U

CN217637626U - Novel limekiln electronic weighing system

Info

Publication number: CN217637626U
Application number: CN202221467667.9U
Authority: CN
Inventors: 李威
Original assignee: Henan Tianbo Shimao Intelligent Technology Co ltd; Henan Zhongheng Industrial Furnace Engineering Technology Co ltd
Current assignee: Henan Tianbo Shimao Intelligent Technology Co ltd; Henan Zhongheng Industrial Furnace Engineering Technology Co ltd
Priority date: 2022-06-14
Filing date: 2022-06-14
Publication date: 2022-10-21
Anticipated expiration: 2032-06-14

Abstract

The utility model provides a novel limekiln electronic weighing system, includes lime feed bin, coal feed bin, the fill of weighing, the fill exit end of weighing seal through the valve, the valve is connected with drive arrangement, all install manual gate valve under lime feed bin, coal vibrating feeder are located corresponding manual gate valve's below, vibrating feeder on be connected with three piece at least hanging springs, every hanging spring's upper portion is connected on force sensor, force sensor's the other end passes through the lifting rope and connects on corresponding feed bin, each force sensor is connected to the controller. The system effectively saves the equipment investment and reduces the space occupied by equipment installation.

Description

Novel limekiln electronic weighing system

Technical Field

The utility model relates to a feed proportioning system on the lime kiln, in particular to electronic weighing system is used in lime production belongs to lime production facility technical field.

Background

The proportion of limestone and coal in the lime shaft kiln is crucial, and the key of the mixing system is accurate weighing and uniform mixing. A limestone proportioning electronic scale and a coal proportioning electronic scale are designed in a blending system, the static hopper scale is adopted, a conventional lime weighing system is characterized in that a lime kiln is provided with a limestone storage bin and a coal storage bin, vibrating feeders are arranged below the two storage bins, two weighing hoppers are arranged at the same time, weighing sensors are arranged on the weighing hoppers, the discharge ends of the weighing hoppers are sealed through rotating valves, the valves are connected with electro-hydraulic push rods, the electro-hydraulic push rods drive the valves to open and close, sensors detect the closing of the valves, one weighing hopper of the two weighing hoppers weighs limestone and one weighing hopper weighs coal, limestone is fed into the limestone proportioning electronic scale through a limestone vibrating feeder controlled by frequency conversion during weighing, a coal vibrating feeder is arranged above the proportioning electronic scale, and the coal is fed into the proportioning electronic scale through a coal vibrating feeder controlled by frequency conversion during weighing. This ensures the accuracy of the weighing. Limestone and coal which are accurately weighed are placed in a middle hopper, and then the weighed limestone and coal are mixed in the middle hopper and enter a skip car, and are lifted into a kiln for calcination. Such systems, although achieving accurate weighing, in use find the following problems: firstly, the vibrating feeder is directly hoisted at the lower opening of the storage bin through the hanging spring, because the vibrating feeder directly installed below the storage bin opening seals the material by virtue of the feeder, the material cannot leak, when the vibrating feeder goes wrong in the production process, the material can directly leak to cause process accidents, for example, the hanging spring is always broken along with the use of the vibrating feeder in actual use, the vibrating feeder falls off, and the material in the storage bin directly leaks to cause process accidents, so that the production is influenced, and the equipment at the position is more compact in arrangement and is very troublesome in maintenance and replacement; secondly, the investment is large, two weighing hoppers are needed to weigh limestone and coal respectively, an intermediate hopper is needed to mix, and the whole installation height of the equipment is high.

Disclosure of Invention

An object of the utility model is to overcome the above-mentioned problem that present lime kiln weighing system exists, provide a novel lime kiln electronic weighing system.

In order to realize the purpose of the utility model, the following technical proposal is adopted: the utility model provides a novel limekiln electronic weighing system, includes lime feed bin, coal bunker, the fill of weighing, the fill exit end of weighing seal through the valve, the valve is connected with drive arrangement, all install manual gate valve under lime feed bin, coal bunker, coal vibrating feeder, limestone vibrating feeder are located the below of corresponding manual gate valve, vibrating feeder on be connected with three at least springs of hanging, every upper portion of hanging the spring is connected on force sensor, force sensor's the other end passes through the rope of hanging and connects on corresponding feed bin, each force sensor is connected to the controller.

Further, the method comprises the following steps of; the discharge ends of the coal vibrating feeder and the limestone vibrating feeder are oppositely arranged, one set of weighing hopper is arranged below the discharge ends of the two vibrating feeders, and the discharge of the two vibrating feeders falls into the same weighing hopper.

Further, the method comprises the following steps of; the coal vibrating feeder and the limestone vibrating feeder are driven by variable frequency motors, and the variable frequency motors are connected to the controller.

Further, the method comprises the following steps of; four hanging springs are connected to the vibrating feeder.

The utility model discloses an actively beneficial technological effect lies in: all installed force sensor in four spring upper ends of hanging in this system, force sensor can give PLC (controller) according to pulling force size output signal, can embody in force sensor output signal after the spring fracture, the controller can know when obtaining the signal and be about to the fracture, can maintain equipment through closing manual gate valve, the effectual vibrating feeder emergence of the technology accident that drops of having avoided, a weighing fill has been saved in this system, a mixing hopper, two kinds of materials accomplish in a weighing fill and weigh, mix, the effectual equipment investment that has practiced thrift, the space that equipment fixing took has been reduced.

Drawings

FIG. 1 is a schematic diagram of the present system.

Fig. 2 is a schematic diagram of a weighing hopper in the present system.

Detailed Description

In order to explain the utility model more fully, the utility model provides an implementation example. These examples are merely illustrative of the present invention and do not limit the scope of the present invention.

The invention is explained in further detail with reference to the drawings, in which the reference symbols refer to: 1: a coal bunker; 2: a limestone silo; 3: a manual gate valve; 4: a coal vibrating feeder; 5: a limestone vibration feeder; 6: hanging a spring; 7: a tension sensor; 8: a weighing hopper; 801: a bucket body; 802: a weighing sensor; 803: a valve; 804: an electro-hydraulic push rod; 9: a chute; 10: and (4) a skip car.

It should be noted that the weighing hopper shown in fig. 2 is conventional, and the structure of the weighing hopper in the system is not improved.

As shown in the attached drawing, a novel lime kiln electronic weighing system, including limestone bin 2, coal bunker 1, weigh and fight 8, the fight exit end of weighing seal through valve 803, the valve is connected with drive arrangement, drive arrangement is electric liquid push rod 804, the last weighing sensor that has of fighting of weighing, all install manual gate valve 3 under lime bin, coal bunker, coal vibrating feeder 4, limestone vibrating feeder 5 are located the below of corresponding manual gate valve, vibrating feeder on be connected with three at least hanging springs, in this embodiment, vibrating feeder on be connected with four hanging springs 6, the upper portion of every hanging spring is connected on tension sensor 7, tension sensor's the other end passes through the hanging rope and connects on corresponding bin, each tension sensor is connected to the controller.

The coal vibrating feeder and the limestone vibrating feeder are oppositely arranged at the discharge ends, one set of weighing hopper 8 is arranged below the discharge ends of the two vibrating feeders, and the discharge of the two vibrating feeders falls into the same weighing hopper. The coal vibrating feeder and the limestone vibrating feeder are driven by variable frequency motors, and the variable frequency motors are connected to the controller.

This weighing system respectively installs a manual gate valve under lime stone and coal feed bin, is in the open mode during this manual gate valve normal production, when vibrating feeder need overhaul, can manually close this gate valve, seals the material in the feed bin. The upper ends of the four hanging springs are respectively provided with a tension sensor, the tension sensors can output 4-20MA signals according to the tension and send the signals to the PLC, when the springs are broken, the output signals of the tension sensors are close to 4MA, the PLC acquires that the output of the tension sensors is changed into 4MA, then a switch quantity signal is output, and an alarm gives an alarm.

The discharge ports of the limestone vibrating feeder and the coal vibrating feeder are both arranged above the electronic weighing hopper and are responsible for supplying limestone and coal into the electronic weighing hopper. The electronic weighing hopper comprises a hopper body, weighing sensors, a bracket, an electro-hydraulic push rod, a weighing hopper support, a limit switch and the like, wherein the weighing hopper is provided with the four weighing sensors, is arranged at four corners of the hopper body and is uniformly distributed. The signal lines of the four weighing sensors all enter the weighing compensation junction box, MV signals from the compensation junction box enter a Siemens WP231 weighing module, and the weight is accurately displayed in real time after the processing is finished by the PLC system. The electronic weighing hopper adopts a mode that limestone and coal are weighed in a time-sharing mode and are layered up and down in the weighing hopper. The weighing hopper is the prior art at present.

During weighing, firstly, setting weighing set values of limestone and coal on an upper computer:

(1) The PLC system starts the limestone vibration feeder controlled by frequency conversion firstly, adopts a full-speed feeding mode, stops the limestone vibration feeder when the weight in the weighing hopper reaches 20% of the set weight of limestone, and calculates and records the actual weight G1 of limestone in the weighing hopper after the limestone vibration feeder is completely stopped after delaying for 5 seconds;

(2) Then starting a coal vibrating feeder type controlled by frequency conversion by a PLC system, adopting a full-speed feeding mode, stopping the coal vibrating feeder when the weight of the coal in the weighing hopper reaches 20% of the set weight of the coal, calculating and recording the weight G2 (containing limestone and coal) of the actual material in the weighing hopper after the coal vibrating feeder is completely stopped after delaying for 5 seconds by the PLC system, and automatically calculating the weight of the limestone in the weighing hopper to be G1 and the weight of the coal to be G2-G1 by the system at the moment;

(3) Starting a limestone vibrating feeder controlled in a variable frequency mode, continuously adopting a full-speed feeding mode, stopping the limestone vibrating feeder when the weight of limestone in a weighing hopper reaches 40% of the set weight of the limestone through real-time detection and calculation of a PLC system, after 5 seconds of delay, after the limestone vibrating feeder is completely stopped, calculating and recording the weight G3 (containing the limestone and coal) of actual materials in the weighing hopper by the PLC system, and automatically calculating the weight of the limestone in the weighing hopper to be G3-G2+ G1 and the weight of the coal to be G2-G1 by the system;

(4) Then the PLC system starts a coal vibrating feeder mode controlled in a frequency conversion mode, a full-speed feeding mode is continuously adopted, the coal vibrating feeder is stopped when the weight of the coal in the weighing hopper reaches 40% of the set weight of the coal, the PLC system calculates and records the weight G4 (containing limestone and coal) of the actual material in the weighing hopper after the coal vibrating feeder is completely stopped after 5 seconds of delay, the system automatically calculates the weight of the limestone in the weighing hopper to be G3-G2+ G1 at the moment, and the weight of the coal is G4-G3+ G2-G1;

(5) By analogy, after the limestone in the weighing hopper is calculated and weighed in real time by the PLC system, the limestone vibrating feeder is changed into slow vibration after the weight of the limestone in the weighing hopper reaches 80% of the set weight, and the limestone vibrating feeder is stopped until the weight of the limestone in the weighing hopper reaches a limestone weighing set value set on an upper computer and the advance of the limestone is subtracted (can be set on the upper computer); when the weight of the coal in the weighing hopper reaches 80% of the set weight after the coal is calculated and weighed in real time by the PLC system, the coal vibrating feeder is changed into slow vibration until the weight of the coal in the weighing hopper reaches a coal weighing set value set on an upper computer and the coal lead is subtracted (can be set on the upper computer), and then the coal vibrating feeder is stopped; the purpose of speed regulation is that the lower the speed of the vibrating feeder is, the smaller the inertia is, and the smaller the inertia is due to the height difference between the limestone (coal) feeder and the weighing hopper, the smaller the weighing error caused by the height difference and the inertia is, and the closer the weighing value is to the set value. The feeding mode combining fast vibration and slow vibration ensures that the weighing value is very close to the set value, and the weighing accuracy is ensured. Meanwhile, the limestone and coal are distributed layer by layer in the weighing hopper to pre-mix the materials.

The bottom of the weighing hopper is provided with an electro-hydraulic push rod, and after the weighing process is finished, the electro-hydraulic push rod is opened, limestone and coal enter the skip car 10 through the chute 9, so that the weighing and mixing processes are finished.

After the embodiments of the present invention have been described in detail, those skilled in the art can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above claims, and any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the technical solution of the present invention, and the present invention is not limited to the embodiments of the examples given in the specification.

Claims

1. The utility model provides a novel limekiln electronic weighing system, includes limestone bin, coal bunker, the fill of weighing, the fill exit end of weighing seal through the valve, the valve is connected with drive arrangement, its characterized in that: all install manual gate valve under lime feed bin, coal bunker, coal vibrating feeder, limestone vibrating feeder are located the below of corresponding manual gate valve, vibrating feeder on be connected with three at least hanging springs, the upper portion of every hanging spring is connected on force sensor, force sensor's the other end passes through the rope of hanging and connects on corresponding feed bin, each force sensor is connected to the controller.

2. The novel electronic weighing system for the lime kiln, as recited in claim 1, is characterized in that: the discharge ends of the coal vibrating feeder and the limestone vibrating feeder are oppositely arranged, one set of weighing hopper is arranged below the discharge ends of the two vibrating feeders, and the discharge of the two vibrating feeders falls into the same weighing hopper.

3. The novel electronic weighing system for the lime kiln as claimed in claim 1, wherein: the coal vibrating feeder and the limestone vibrating feeder are both driven by variable frequency motors, and the variable frequency motors are connected to the controller.

4. The novel electronic weighing system for the lime kiln, as recited in claim 1, is characterized in that: four hanging springs are connected to the vibrating feeder.