阅读说明：本技术 一种高炉料面形状测量方法 (Blast furnace burden surface shape measuring method ) 是由 李佳 蔡田 张亮 罗石元 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种高炉料面形状测量方法。该方法采用高炉料面形状测量系统进行测量,该测量系统包括雷达测量组件、链接机构、两自由度五杆机构、驱动电机、计算机控制单元,所述雷达测量组件通过链接机构安装于两自由度五杆机构上,所述两自由度五杆机构与驱动电机相连,所述计算机控制单元分别与雷达测量组件、驱动电机相连。该方法可实现对每个想扫描区域的位置信息获取,获得对于特定料面的了解,并实现在“黑箱、多粉尘、高温”环境下的料面测定。(The invention discloses a blast furnace burden surface shape measuring method. The method adopts a blast furnace burden surface shape measuring system to measure, the measuring system comprises a radar measuring component, a link mechanism, a two-degree-of-freedom five-rod mechanism, a driving motor and a computer control unit, the radar measuring component is arranged on the two-degree-of-freedom five-rod mechanism through the link mechanism, the two-degree-of-freedom five-rod mechanism is connected with the driving motor, and the computer control unit is respectively connected with the radar measuring component and the driving motor. The method can acquire the position information of each area to be scanned, acquire the knowledge of specific charge level and realize charge level measurement in the environment of black box, dust and high temperature.)

1. A blast furnace surface shape measuring method adopts a blast furnace surface shape measuring system to measure, the measuring system comprises a radar measuring component, a link mechanism, a two-degree-of-freedom five-bar mechanism, a driving motor and a computer control unit, the radar measuring component is arranged on the two-degree-of-freedom five-bar mechanism through the link mechanism, the two-degree-of-freedom five-bar mechanism is connected with the driving motor, the computer control unit is respectively connected with the radar measuring component and the driving motor, and the radar measuring component is arranged at a cone table at the upper part of a furnace body;

the blast furnace burden surface shape measuring method comprises the following steps:

step 1: installing all the components in place, and sequentially connecting a radar measuring component, a link mechanism, a two-degree-of-freedom five-rod mechanism, a driving motor and a computer control unit to ensure that the radar measuring component can scan all positions of the charge level in the furnace body;

step 2: setting a specific track to measure the charge level condition of a specific area;

and step 3: the computer control unit controls the driving motor according to a set track so as to drive the two-degree-of-freedom five-bar mechanism to move, and the two-degree-of-freedom five-bar mechanism drives the radar measuring assembly to rotate through the link mechanism, so that the radar measuring assembly scans according to a preset track;

and 4, step 4: transmitting a radar signal of the radar measuring assembly to the computer control unit, and storing a measuring result;

and 5: and after the radar signal is processed by background software, storing the three-dimensional space coordinate information of the measuring point in a database, and displaying a final measuring result through an interface.

2. The blast furnace burden surface shape measuring method according to claim 1, wherein: the radar measuring assembly comprises a radar antenna, a universal joint and a swing rod, wherein the radar antenna and the swing rod are located on two sides of the universal joint, the swing rod is connected with the two-degree-of-freedom five-rod mechanism through a link mechanism, and the two-degree-of-freedom five-rod mechanism is driven by a driving motor to control the swing rod to rotate through the link mechanism, so that dynamic scanning of the radar measuring assembly is realized.

3. The blast furnace burden surface shape measuring method according to claim 1, wherein: the linkage mechanism comprises an upright rod, a longitudinal shaft and a transverse shaft, the transverse shaft is connected with a shaft bracket at the top of the oscillating rod, the shaft bracket at the lower end of the upright rod is connected with the longitudinal shaft, the longitudinal shaft and the transverse shaft are distributed in a cross shape, and the upper part of the upright rod is telescopically arranged into the two-degree-of-freedom five-rod mechanism.

4. The blast furnace burden surface shape measuring method according to claim 1, wherein: the computer control unit is positioned in a main control room outside the blast furnace body, and signal transmission is carried out between the radar measuring assembly and the computer control unit through an optical cable.

5. The blast furnace burden surface shape measuring method according to claim 4, wherein: the length of the optical cable is between 200 and 400 m.

6. The blast furnace burden surface shape measuring method according to claim 1, wherein: the driving motor is a servo motor.

7. The blast furnace burden surface shape measuring method according to claim 1, wherein: the track in the step 2 and the step 3 is selected from at least one of a straight line, a fan shape, a circle and an ellipse.

Technical Field

The invention relates to the technical field of blast furnace measuring equipment, in particular to a blast furnace burden surface shape measuring method.

Background

At present, in an integrated iron and steel enterprise, a blast furnace is mainly used for supplying molten iron for steelmaking, the size of the blast furnace is increased, the internal volume of one blast furnace is generally between 2000 and 5500m3, in order to improve the yield, the blast furnace is designed into a closed high-pressure container, the top pressure of the blast furnace is 0.20-0.25MPa, a large amount of high-temperature coal gas is continuously generated in the production process of the blast furnace, for a 4000m3 blast furnace, the generation amount of the coal gas per minute is about 11000 and 12000m3, and the coal gas contains a large amount of dust.

The blast furnace is continuously filled with furnace burden at the upper part, and continuously blows hot air at the lower part to maintain the operation of the blast furnace, so that the rhythm of the descending of the furnace burden of the blast furnace is accurately controlled, and the descending state of the furnace burden is controlled, namely the shape of a burden surface becomes the core of the stable operation of the blast furnace, wherein the measurement of the burden surface of the blast furnace is the control link of maintaining the normal production of the blast furnace.

At present, there are 7 methods for measuring charge level, such as mechanical stock rod of charge level, radar stock rod, array radar charge level measurement, laser charge level measuring instrument, infrared charge level measurement, scanning radar charge level measurement, phased array charge level measurement, etc.

The most classical stock level measuring technology of a stock rod is introduced in documents of Huyantao, Sunjiao, Liuchen Rong and the like, balance speed stabilizers, metallurgical equipment, No. 239, and 2017 supplement (2). The technology is characterized in that an iron ball is hung under a chain, the chain and the iron ball fall into a furnace after the material distribution is finished, and the stock level change condition of the falling point is measured through the falling depth of the chain and the moving condition of the iron ball.

The application of a radar level gauge in a first steel 2 blast furnace, iron making, 2 months in 2009, vol.28, No.1, P47-48 introduces a technology for measuring the level by using a radar stock rod, the first steel 2 blast furnace (1780m3) is started in 2002 in 4 months, 24 air ports, the lower part of a furnace body, the furnace waist and the furnace belly are provided with 3 sections of copper cooling walls, advanced equipment such as a blast furnace basic data acquisition system, a blast furnace gas component online analysis system, an air port camera system and a furnace throat infrared imaging system are sequentially arranged, and perfect monitoring equipment provides a data base for objective analysis of a blast furnace smelting process. In the 7 th month in 2004, 1 radar level gauge is installed beside a mechanical stock rod/north of the No. 2 blast furnace, and after data comparison with the mechanical stock rod, the measurement precision of the No. 2 blast furnace is proved to meet the process requirement of the blast furnace. In 2007, in 5 months, 4 radar level gauges were installed. No. 2 blast furnace utilizes 7 radar level gauges, comprehensively utilizes measurement technology, data acquisition technology and data transmission technology to continuously measure the blast furnace burden level, and provides the distribution state and the change rule of different burden materials in the radial direction of the furnace throat. The technology replaces a mechanical stock rod with a radar, changes the measuring mode, and still has extremely limited information acquisition amount.

According to the technical scheme, 4-6 independent charge level measuring radars are installed at different positions of a furnace top, 4-6 holes are formed in the furnace top, 4-6 independent charge level measuring radars are installed, the charge level condition in the radial direction of the blast furnace can be estimated approximately by using 4-6 fixed point radar measuring results, a plurality of radars are needed to be installed on the furnace top at the same time, the number of holes formed in the furnace top is too large, certain danger is caused to the production of the blast furnace, and the information amount of 4-6 point measurement is still too small compared with the charge level of 5-90 m 2.

The document 'Qiu household, high-performance armor, application of a bell-less blast furnace charging laser measuring technology, iron making, 2 months in 2014, Vol.33, No.1, P47-50' introduces a laser charge level measuring instrument, the method is that a high-power laser generator is arranged at a proper position of a furnace top, laser distance measurement is realized by scanning the charge level through laser, the furnace is filled with dust with the particle size of less than 1mm, the laser wavelength is smaller than the particle size of the dust, the dust shields the laser, and the laser is difficult to bypass the particle size of the dust, so the technology is feasible in charge level measurement before the furnace is started, once the blast furnace is produced, the technology has fatal defects, and the use condition is poor.

An infrared charge level measurement technology is introduced in the document 'zhulii, anzhu, zhangxiong, quefort, qiuchuan, application of infrared camera technology on the top of a Xuanzhu blast furnace, hebei metallurgy, total 162 th, 2007 6 th, P33-36', the technology utilizes the infrared technology to measure the temperature of the charge level to indirectly evaluate the condition of the charge level, the technology can only measure the infrared temperature of the charge level and cannot calculate the shape of the charge level, so the technology cannot be used as the charge level measurement technology.

In the patent ' Cheng, a radar scanning device capable of monitoring the change of the charge level of a blast furnace in real time ', patent No. 201420853174.8, invention patent ' introduces a scanning radar charge level measurement technology, which realizes the stable scanning measurement of the radial direction of the top of the blast furnace at present, can stably obtain the charge level information of the radial direction of the blast furnace, but is limited by the structure and the installation, the method can only move in the radial direction of the top of the blast furnace, and is difficult to obtain the charge level information of other directions and other places of the top of the blast furnace.

The literature ' introduction of metallurgy science and technology prize ', the development and application of a visual blast furnace burden distribution control system based on a phased array radar, and the technology for measuring the burden surface of a phased array is introduced in 2015, Vol.25 and No.7 ', the technology utilizes the phased array technology to realize the measurement of the whole burden surface in an electric scanning mode, the technology is still in a test stage at present, although the test result is satisfactory, the long-term stable use also has many challenges, such as service life problem, cooling problem, maintenance problem, cost problem and the like, because a huge radar antenna needs to be inserted into a blast furnace, the antenna is exposed in high-temperature dust at any time to bear scouring, and once the antenna is damaged, the maintenance and the updating are difficult.

In summary, the above-mentioned technology mainly uses single point, multi-point array, radius, whole charge level to realize the measurement of whole charge level, and the main problem exists that the measurement information is limited, such as charge level mechanical probe, radar probe, array radar charge level measurement, etc.; or the measuring position is fixed, such as a charge level mechanical stock rod, a radar stock rod, an array radar charge level measurement, a laser charge level measuring instrument, a scanning radar charge level measurement and the like; or the measurement cost is high, the technology is not mature, and a lot of places need to be improved, such as phased array level measurement and the like.

Disclosure of Invention

The present invention has been made to solve the above problems occurring in the prior art, and an object of the present invention is to provide a blast furnace burden surface shape measuring method. The method can realize the charge level measurement in the environment of black box, multiple dust and high temperature.

In order to achieve the technical purpose, the invention adopts the following technical scheme:

a blast furnace surface shape measuring method adopts a blast furnace surface shape measuring system to measure, the measuring system comprises a radar measuring component, a link mechanism, a two-degree-of-freedom five-bar mechanism, a driving motor and a computer control unit, the radar measuring component is arranged on the two-degree-of-freedom five-bar mechanism through the link mechanism, the two-degree-of-freedom five-bar mechanism is connected with the driving motor, the computer control unit is respectively connected with the radar measuring component and the driving motor, and the radar measuring component is arranged at a cone table at the upper part of a furnace body;

the measuring method comprises the following steps:

step 1: installing all the components in place, and sequentially connecting a radar measuring component, a link mechanism, a two-degree-of-freedom five-rod mechanism, a driving motor and a computer control unit to ensure that the radar measuring component can scan all positions of the charge level in the furnace;

step 2: setting a specific track to measure the charge level condition of a specific area;

and step 3: the computer control unit controls the driving motor according to a set track so as to drive the two-degree-of-freedom five-bar mechanism to move, and the two-degree-of-freedom five-bar mechanism drives the radar measuring assembly to rotate through the link mechanism, so that the radar measuring assembly scans according to a preset track;

and 4, step 4: transmitting a radar signal of the radar measuring assembly to the computer control unit, and storing a measuring result;

and 5: and after the radar signal is processed by background software, storing the three-dimensional space coordinate information of the measuring point in a database, and displaying a final measuring result through an interface.

Preferably, the radar measuring assembly comprises a radar antenna, a universal joint and a swing rod, the radar antenna and the swing rod are located on two sides of the universal joint, the swing rod is connected with the two-degree-of-freedom five-rod mechanism through a link mechanism, and the two-degree-of-freedom five-rod mechanism is driven by a driving motor to control the swing rod to rotate through the link mechanism, so that dynamic scanning of the radar measuring assembly is achieved.

Preferably, the link mechanism comprises an upright rod, a longitudinal shaft and a transverse shaft, the transverse shaft is connected with a shaft bracket at the top of the swing rod, the shaft bracket at the lower end of the upright rod is connected with the longitudinal shaft, the longitudinal shaft and the transverse shaft are distributed in a cross shape, and the upper part of the upright rod is telescopically arranged into the two-degree-of-freedom five-rod mechanism.

Preferably, the computer control unit is positioned in a main control room outside the blast furnace body, and signal transmission is carried out between the radar measuring assembly and the computer control unit through an optical cable.

Further, the cable length is between 200 and 400 m.

Preferably, the driving motor is a servo motor.

Preferably, the trajectory in step 2 and step 3 is at least one selected from a straight line, a sector, a circle, and an ellipse.

After the technical scheme is adopted, the characteristic of a preset track can be realized by using the two-degree-of-freedom five-rod mechanism, the measuring track is preset by using a computer, the motor is controlled by using the computer to drive the two-degree-of-freedom five-rod mechanism, and the mechanical scanning radar is driven to scan a specific area or track according to the preset track, so that the position information of each area to be scanned is acquired, and the specific charge level is known. The two-degree-of-freedom five-rod mechanism, the driving motor and the computer control unit realize the adaptability and the designability of radar scanning to any track, and compared with similar products in the field, the radar scanning device has more scanning measurement details, more modes and further expanded functions. According to the technical scheme, a computer control system, a two-degree-of-freedom five-rod mechanism and a mechanical scanning radar jointly form an exquisite measuring system, and the charge level can be measured in a 'black box, multi-dust and high-temperature' environment.

Drawings

FIG. 1 is a schematic view of a blast furnace burden surface shape measuring system according to the present invention;

FIG. 2 is a schematic view of the connection structure of the radar measuring assembly, the link mechanism and the two-degree-of-freedom five-bar mechanism in the invention;

the reference numbers in the figures are as follows:

1-a radar measurement component; 11-a swing rod; 13-a radar antenna; 12-a universal joint; 2-a link mechanism; 21-erecting a rod; 22-longitudinal axis; 23-horizontal axis; 3-a two-degree-of-freedom five-bar mechanism; 31-a first rocker; 32-a first slider; 33-a second rocker; 34-a second slide; 35-a frame; 4-driving the motor; 5-a computer control unit; 7-furnace body; 8-material level; 9-universal joint support.

Detailed Description

In order that the invention may be more clearly understood, the following detailed description of the embodiments of the invention is given with reference to the accompanying drawings and examples.

Here at 4000m³For example, a blast furnace is provided, and an embodiment of a method and a system for measuring a charge level shape of a blast furnace is provided.

The invention relates to a blast furnace burden surface shape measuring method, which adopts a blast furnace burden surface shape measuring system for measurement, the measuring system is shown in figure 1 and figure 2, the measuring system comprises a radar measuring component 1, a link mechanism 2, a two-degree-of-freedom five-bar mechanism 3, a driving motor 4 and a computer control unit 5, the radar measuring component 1 is arranged on the two-degree-of-freedom five-bar mechanism 3 through the link mechanism 2, the two-degree-of-freedom five-bar mechanism 3 is connected with the driving motor 4, the computer control unit 5 is respectively connected with the radar measuring component 1 and the driving motor 4, and the radar measuring component 1 is arranged at a cone table at the upper part of a furnace body 7;

preferably, the radar measuring component 1 comprises a radar antenna 13, a universal joint 12 and a swing rod 11, the swing rod 11 is connected with the two-degree-of-freedom five-rod mechanism 3 through a link mechanism 2, and the two-degree-of-freedom five-rod mechanism 3 is driven by a driving motor 4 to control the swing rod 11 to rotate through the link mechanism 2, so that dynamic scanning of the radar measuring component 13 is realized.

The link mechanism may include an upright rod 21, a longitudinal shaft 22 and a transverse shaft 23, the transverse shaft 23 is connected to a shaft bracket at the top of the swing rod 11, the shaft bracket at the lower end of the upright rod 21 is connected to the longitudinal shaft 22, the longitudinal shaft 22 and the transverse shaft 23 are distributed in a cross shape, and the two-degree-of-freedom five-bar mechanism 3 is telescopically arranged at the upper part of the upright rod 21.

The two-degree-of-freedom five-bar mechanism 3 has a plurality of feasible manners in the prior art, for example, the mechanism can comprise a first rocker 31, a first sliding block 32, a second rocker 33, a second sliding block 34 and a frame 35, the upper part of the upright 21 passes through the first rocker 31 and the second rocker 33, the first sliding block 32 is slidably arranged on the first rocker 31, the second sliding block 34 is slidably arranged on the second rocker 33, and the first sliding block 32 and the second sliding block 34 are respectively rotatably arranged on the frame 35. The mechanism can have various driving modes, for example, the first sliding block 32 is driven to slide on the first rocker 31, the second sliding block 34 is driven to slide on the second rocker 33, or the first rocker 31 and the second rocker 33 are driven to swing, and accordingly, the driving motor 4 can be installed at different positions in different modes, in short, the driving motor 4 realizes the movement of the first rocker 31 and the second rocker 33, so as to drive the vertical rod 21 to move, and further enable the radar measuring component 1 to move. In the process, the vertical rod 21 can be kept in the vertical direction all the time, and the technical combination of the two-degree-of-freedom five-rod mechanism 3 belongs to the prior art and is not described in detail herein.

As an example of the technical solution of the present invention, the 4000m³The diameter of the blast furnace throat is 10m, the material line at the furnace top is 1.3m, a funnel-shaped material surface with a platform is formed during normal production, and the area of the material surface is 100m²Left and right. The driving motor is used for driving the mechanism to operate, and the motor can adopt a micro servo motor such as a Siemens SM80-D601930 model, an SM80-D752430 model, or an SM80-K103230 and the like for driving the relevant measuring mechanism to operate. The length of the scanning radar antenna in the radar measuring assembly is controlled below 50 cm. The control system and the circuit system are arranged outside the furnace, and the radar measuring system 1 is arranged at the vertebral platform at the upper part of the furnace body 7; a universal joint support frame 9 is arranged at a radar channel at a vertebral platform at the upper part of the furnace body 7, a universal joint 12 of the radar measuring system 1 is rotatably arranged on the universal joint support frame 9, the computer control unit 5 is arranged in a main control room, signal transmission is carried out between the radar measuring system 1 and the computer control unit 5 through an optical cable, and the length of the optical cable is between 200 and 400 m.

The charge level 8 in the furnace is a measurement target of the measurement method of the present invention, and the charge level 8 in the furnace is formed by periodically charging coke and ore. The material surface 8 is a funnel-shaped material surface with a platform, and the area of the material surface is 80-100m²To change between.

The blast furnace burden surface shape measuring method comprises the following steps:

step 1: mounting all the components in place, and sequentially connecting a radar measuring component 1, a link mechanism 2, a two-degree-of-freedom five-rod mechanism 3, a driving motor 4 and a computer control unit 5 to ensure that the radar measuring component 1 can scan all positions of a charge level 8 in a furnace body 7;

step 2: setting a specific track to measure the charge level condition of a specific area;

and step 3: the computer control unit 5 controls the driving motor 4 according to a set track, and further drives the two-degree-of-freedom five-bar mechanism 3 to move, and the two-degree-of-freedom five-bar mechanism 3 drives the radar measuring component 1 to rotate through the link mechanism 2, so that the radar measuring component 1 scans according to a preset track;

and 4, step 4: transmitting the radar signal of the radar measuring component 1 to a computer control unit 5, and storing the measuring result;

and 5: and after the radar signal is processed by background software, storing the three-dimensional space coordinate information of the measuring point in a database, and displaying a final measuring result through an interface.

Preferably, the trajectory is at least one selected from the group consisting of a straight line, a circular shape, and an elliptical shape.

The computer control unit 5 is responsible for the operation and control of the whole system. The method comprises the steps of realizing track setting on a computer, storing the set track in the computer, starting a motor through a control program, driving a motion mechanism, controlling to realize a preset motion track, storing and transmitting radar signals, storing measurement results, and operating a control interface of the whole system in the unit.

The radar measuring component 1 realizes the measurement of the specific track of the specific area of the material surface 8, the measuring signal is controlled by the circuit system 6, the radar signal is transmitted to the material surface 8, is received by the radar antenna 13 after being reflected, and is transmitted to the computer control unit 5 through the circuit system 6. The set track equation of the two-degree-of-freedom five-rod mechanism 3 represents a specific path of the radar measuring component 1 in the furnace body 7, and the specific area in the furnace can be measured by setting tracks such as a circle, an ellipse, a sector and the like.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.