JP3557304B2 - Coke strength testing machine and automatic coke strength measuring device - Google Patents

Description

【００２４】
また、本発明では、開閉蓋１０のアクチュエータ１１を本体ドラム６に装着し、本体ドラムと共に回転するようにしたので、試料の装入及び排出に際し、該本体ドラムを傾動させる必要がなく、本体ドラムは狭いスペースでも設置できるようになった。さらに、開閉蓋１０は、片開きに限らず、図７に示すような両開式（ウイング形）としても良い。
【００２５】
【発明の効果】
以上述べたように、本発明により、人手作業を皆無として試験作業の自動化、迅速化が達成された。また、従来よりも高い測定精度が得られたばかりでなく、コークス粉塵が多い環境及び危険作業からも開放された。
【図面の簡単な説明】
【図１】本発明に係るコークスの強度試験機を示す斜視図である。
【図２】図１の正面図であり、開口部が上向き状態を示す。
【図３】本体ドラムの形状を説明する図である。
【図４】図１の正面図であり、開口部が下向き状態を示す。
【図５】本発明に係るコークス強度の自動測定装置の全体を示すフロー図である。
【図６】図５における各手段及び機器間の連結手段を示す図である。
【図７】両開き式開閉蓋の一例を示す図である。
【図８】従来のコークス強度試験機の正面を示す図である。
【図９】図８の側面図であり、該試験機の操作を説明する図である。
【符号の説明】
１ 搬送手段（ベルトコンベヤ）
２ 存在確認センサ
３ サンプラ
４ 篩分手段（トロンメル）
５ 秤量器
６ 本体ドラム
７ 篩分手段
８ 秤量器
９ 運転指令手段（演算制御装置）
１０ 開閉蓋
１１ アクチュエータ
１２ 回転軸
１３ カップリング
１４ 減速歯車
１５ 駆動電動機
１６ クランク軸
１７ 軸受
１８ 複式ロータリージョイント
１９ 供給口
２０ 供給管
２１ 回転センサ
２２ 排出位置検出センサ
２３ 閉状態検出センサ
２４ 開状態検出センサ
２５ コークス掻き上げ用アングル
２６ クランク・アーム
２７ 取付アーム
２８ ベルト・コンベヤ
２９ ベルト・フィーダ
３０ ベルト・フィーダ
３１ スキップ・ホイスト
３２ 振動シュート
３３ 中間ホッパ
３４ ベルト・コンベヤ
３５ ベルト・コンベヤ
３６ 蓋固定用ストッパ
３７ ヒンジ
３８ 試験用コークス試料（試料）
３９ 破砕試料
４０ 手動開閉蓋
４１ コークス
４２ 開口部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a coke strength tester and an automatic measuring apparatus for coke strength, in particular, which automates a series of steps from sample collection to disposal to improve labor saving, efficiency and measurement accuracy of work. It is.
[0002]
[Prior art]
Generally, in order to maintain a stable furnace condition in blast furnace operation, it is important to ensure the air permeability of the blast furnace. It is known that this permeability depends on the properties of the raw fuel charged into the blast furnace, particularly the strength of coke. Therefore, detecting the strength of coke charged into the blast furnace and its fluctuation are important management items when operating the blast furnace.
[0003]
By the way, several methods for measuring the coke strength are known. One of the methods for measuring the coke breaking strength (the degree to which the sample is broken by an external force) is defined in JIS K 2151. Tumbler strength test method. Then, a testing machine including a drum called a tumbler as shown in FIG. 8 is used. The main drum 6 containing a predetermined amount of sample is supported by a rotating shaft 12 and a bearing 17, and is rotated by a drive motor 15 via a coupling 13 and a reduction gear 14 connected to the rotating shaft 12. It has become. The main drum 6 is provided with a manual opening / closing lid 40 having a hinge 37 and a lid fixing stopper 36 for taking in and out of the sample.
[0004]
Hereinafter, a working example of the tumbler strength test specified in the JIS will be described with reference to FIG. First, a certain amount of coke is collected manually or by a sampler from the transporting means 1 (for example, on the way to a blast furnace hopper) which transports coke to a destination. The collected coke is sized by hand or an automatic sieving apparatus to the particle size specified in the JIS test method, weighed by hand, and adjusted as a test coke sample (hereinafter simply referred to as a sample) 38. Then, the sample 38 is manually loaded into the main body drum 6 of the tumbler tester in which the manual opening / closing lid 40 is stopped so as to face upward. Thereafter, the manual opening / closing lid 40 is fixed by the lid fixing stopper 36 so as to prevent the sample 38 inside from jumping out during the test.
[0005]
Next, the main body drum 6 is rotated at a specified rotation speed (24 ± 1 rpm) and a predetermined number of rotations to crush the sample 38 held therein. Then, the manual opening / closing lid 40 is opened downward, and the crushed sample 39 in the main body drum 6 is manually scraped out and discharged. Subsequently, the crushed sample 39 is sieved to a particle size specified by a hand sieve or an automatic sieving device, and a sample of each particle size is weighed, and then calculated as a tumbler strength using a specified formula. The disposal operation of disposing of the surplus coke collected by the sampler and the crushed sample 39 after the test is performed manually.
[0006]
[Problems to be solved by the invention]
However, the above-mentioned conventional test methods include operations such as coke collection and sieving, adjustment of the sample particle size and weight, charging and discharging of the sample to the tumbler tester, and transporting the sample between each process. Most of the work was done manually, and had the following problems.
[0007]
(1) A long time is required for a series of measurement operations (the measurement speed is low).
(2) It is difficult to increase the measurement frequency (times / day).
(3) It is essential to secure skilled workers.
(4) The measurement values vary greatly depending on the skill of the operator, and the measurement accuracy is poor.
(5) The workplace has a lot of dust scattering and the working environment is poor.
[0008]
(6) It is severe work in heavy muscle work.
(7) Workplaces are prone to man-made accidents near rotating and moving equipment, and are dangerous work.
In view of the above circumstances, the present invention provides a coke strength testing machine and an automatic coke strength measuring device that achieve high test accuracy while achieving automation, speeding up, and safety and hygiene of test work without any manual work. It is intended to provide.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the inventor has reexamined a conventional method for measuring coke strength, and has worked diligently to achieve a great effect by combining many known techniques with its automation. The present invention has been made as a result thereof, that is, a coke strength testing machine including a covered cylindrical body for accommodating a coke sample and a rotating means for rotating the cylindrical body around its axis. An opening having the same width as the length in the longitudinal direction and an opening / closing lid provided on the outer periphery of the cylindrical body, and a mounting arm for pressing or pulling the opening / closing lid to or from the opening, and rotating the mounting arm. A coke strength tester comprising: a crankshaft to be driven; a crank arm connected to the crankshaft; and an actuator for rotating the crank arm.
[0010]
Further, the present invention provides a rotation sensor for detecting a rotation speed of the cylindrical body and a sample loading position, a discharge position detection sensor for detecting a position for discharging a sample, and an open state detection for detecting an open state of an opening / closing lid. A sensor, a closed state detection sensor for detecting a closed state, and operation command means for receiving signals from the sensors, stopping and restarting the tubular body, and opening and closing the open / close lid. It is also a characteristic coke strength tester.
[0011]
Further, the present invention provides an existence confirmation sensor for detecting the presence or absence of coke on the conveying means, a sampler for sampling a part of the existing coke, a sieving means for sifting the collected coke, and a sieving means for the sieving means. a weighing device for weighing divided coke; and the strength tester to measure the intensity of test coke samples prepared in the weighing unit, a sieving means for sieving the crushed sample was discharged from said intensity tester, A weighing device for weighing each sample weight sieved by the particle size by the sieving device, a calculator for calculating the strength of the sample from the weighed value, and a transport unit for returning the weighed sample to the transport unit, An automatic measuring apparatus for coke strength, comprising: a plurality of sensors for operating the above-mentioned units and devices; and an operation commanding unit for receiving signals from these sensors and instructing the operation of the units and devices.
[0012]
The coke strength in this case corresponds to a tumbler strength, a drum strength, a rotation strength, a my cam strength, etc. which are usually frequently used. Hereinafter, the embodiment and operation of the present invention will be described by selecting a case of tumbler strength as a representative example.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
First, a coke strength tester according to the present invention, whose main part is a rotatable cylindrical body (hereinafter referred to as a main body drum 6) for accommodating a sample, as shown in FIG. Up to here, it is the same as the conventional coke strength tester. However, the opening for charging and discharging the coke sample of the conventional testing machine has been appropriately sized, but the present invention has the same width on the outer circumference of the main drum 6 as the length in the longitudinal direction. An opening 42 and an opening / closing lid 10 that covers the opening 42 are provided. The reason why the width is the same is that the convenience in automatic loading and discharging of the sample is taken into consideration. Further, the opening / closing lid 10 includes a mounting arm 27 for pressing or pulling the lid on or off the opening, a crankshaft 16 for rotating the mounting arm 27, a crank arm 26 connected to the crankshaft 16, -It is supported by the actuator (drive device) 11 for rotating the arm 26. As shown in FIG. 2, this actuator 11 is supplied with a drive source (eg, oil, compressed air, etc.) via a supply port 19, a dual rotary joint 18, and a supply pipe 20, and discharges the drive source. Has become.
[0014]
The main body drum 6 is provided with a rotating means including a rotating shaft 12, a coupling 13, a reduction gear 14, and a driving motor 15, as in the related art. However, the strength tester according to the present invention includes a rotation sensor 21 for detecting the rotation speed of the main drum 6 and a charging position for the sample 38, a discharge position sensor 22 for detecting a discharge position of the sample 38, 10 open state detecting sensor 23 and closed state detecting sensor 24 are separately provided, and the above-mentioned rotating means, lid opening / closing means, and various kinds of signals are used to instruct and operate the test machine (operation control means). The operation of the main drum 6, the opening and closing of the opening / closing lid 10, and the loading / unloading of the sample 38 are automatically performed in cooperation with 9.
[0015]
Next, a work flow from the operation to the stop of the coke strength tester will be described. The loading of the sample 38 into the main drum 6 is performed with the opening of the main drum 6 facing upward and stopped. This upward stop is performed by a command of the operation command means 9 receiving a signal from the rotation sensor 21. Then, the signal from the open / closed state detection sensors 23 and 24 is actuated via the operation command means 9 to activate the actuator 11 to open the opening / closing lid 10, and then the sample 38 conveyed by the skip hoist is transferred to the main drum 6. To charge. When the loading of the sample 38 is completed, the open / close lid 10 is closed via the open / closed state detection sensors 23 and 24 and the operation command means 9. Subsequently, the main drum 6 is rotated while the rotation sensor 21 detects the number of rotations by operating the drive motor 15 in accordance with a command from the operation command means 9 to rotate and crush the sample 38 accommodated therein. When the predetermined rotation is completed (the rotation is detected by the rotation sensor 21), the main body drum 6 stops with the opening / closing lid 10 facing downward. This downward stop is performed with the help of the rotation sensor 21 and the discharge position sensor 22. Thereafter, the actuator 11 is operated by the instruction of the operation command means 9 to open the opening / closing lid 10, and the crushed sample 39 is collected in a predetermined container and transported to the sieving means and the weighing device.
[0016]
Further, in the present invention, in order to reliably discharge the sample from the main body drum 6, the following measures are taken in the shape of the main body drum 6, the opening angle of the opening / closing lid 10, and the like.
(A) In the main drum 6, when the main drum 6 is stopped with the opening 42 of the main drum 6 directly below, the coke scraping angle 25 (usually, a plurality of coke scraping angles 25 are arranged at appropriate intervals along the longitudinal direction. (Especially two pieces at 180 ° intervals in a tumbler tester) are mounted so that their end faces are vertically downward as shown in FIG. Also, the coke scraping angle 25 disposed on the inner surface of the opening / closing lid 10 is mounted such that the end face thereof is vertically upward, so that the crushed sample 39 does not remain on the angle scraping surface when the coke is discharged.
[0017]
(B) The size of the opening 42 of the main drum 6 is set so that Δa shown in FIG. 3 is equal to or larger than the angle of repose of coke so that the sample 39 does not remain in the drum 6 when the crushed sample 39 is discharged. Set to.
(C) The opening angle of the lid 10 is set so that Δb in FIG. 8 is equal to or larger than the coke angle of repose so that the sample does not remain on the inner surface of the lid 10 when the crushed sample 39 is discharged.
[0018]
(D) The crankshaft 16 of the opening / closing lid 10 is provided outside the main body drum 6, the connecting portion between the opening / closing lid 10 and the mounting arm 27 is provided at the center of the outer curved surface of the opening / closing lid 10, and the connecting portion has flexibility. The main drum 6 and the opening / closing lid 10 were brought into close contact with each other (see FIG. 4).
When only the coke strength tester according to the present invention described above was incorporated into a series of conventional works for measuring the coke strength described above, even if the sample adjustment, sieving, weighing work, and the like were performed manually, the work efficiency was low. Significantly improved than before. However, the present inventor has devised a new automatic measuring apparatus for coke strength with the aim of taking a further leap.
[0019]
Hereinafter, the embodiment and operation of the automatic coke strength measuring apparatus will be described. The system is automated by combining known means except for the strength tester, and the entire configuration of the device is shown in FIG. However, since the individual means are all known except for the strength tester, the description of the overall configuration is omitted, and only the operation using the automatic measuring device will be described. First, when the presence / absence of a coke 41 is detected by a presence confirmation sensor 2 (ultrasonic level meter) provided above the conveying means 1 such as a belt conveyor for conveying coke to a destination of use, the sampler 3 (for example, an extrusion type) is activated. When activated, a part of the coke is collected. The collected coke is supplied to a sieving means 4 (a trommel rotary sieve) and sieved at a sieve size specified by the JIS test method. From the sieved coke, a sample having a particle size of 50 to 75 mm corresponding to a sample for a strength test is supplied to a weighing machine 5 (belt wear), and a specified amount (about 10 kg) is divided by weighing to obtain a sample 38. You. In addition, the coke that is generated outside the specified range (particle size <50 mm and the particle size> 75 mm) and the surplus coke having the specified particle size (50 to 75 mm) are returned to the transport unit 1.
[0020]
Next, the obtained sample 38 is supplied to the leading logger Kusu strength tester. Then, it is crushed by rotation at a specified rotation speed (24 ± 1 rpm) and a rotation speed (1400 or 400). The crushed sample 39 is subsequently sieved by a sieving means 7 (vibrating sieve) to a specified particle size (mesh size 6 mm), and the weight of each particle size is weighed by a weighing device 8. At this time, the weighed value is input to a calculator (using a part of the operation command means), and a tumbler strength value is calculated using a predetermined formula. The sample 39 weighed by the weighing device 8 is returned to the transport means 1.
[0021]
The automatic measuring apparatus is provided with a plurality of sensors 21, 22, 23, 24 and operation command means (computation control device) 9 for operating the above-described units and devices, and samples 38, 39. A chute 32, belt conveyors 28 and 29, a belt feeder 30, a skip hoist 31, and the like shown in FIG. The operation command means 9 can be used in combination with the coke strength tester.
[0022]
Finally, Table 1 collectively shows the results when the automatic measuring apparatus for coke strength according to the present invention is used, in comparison with the case where each step of the measurement is manually performed as in the conventional case. As is evident from Table 1, the use of the apparatus according to the present invention achieves labor saving of work, improvement of measurement capability, and reduction of variation in measured values.
[0023]
[Table 1]

[0024]
Further, in the present invention, the actuator 11 of the opening / closing lid 10 is mounted on the main drum 6 and is rotated together with the main drum, so that it is not necessary to tilt the main drum when loading and discharging the sample. Can now be installed in tight spaces. Further, the opening / closing lid 10 is not limited to a single-opening type, and may be a double-opening type (wing type) as shown in FIG.
[0025]
【The invention's effect】
As described above, according to the present invention, automation and speeding up of the test operation are achieved without any manual operation. In addition, not only higher measurement accuracy than before, but also environment free from coke dust and hazardous work was achieved.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a coke strength tester according to the present invention.
FIG. 2 is a front view of FIG. 1, showing an opening in an upward direction.
FIG. 3 is a diagram illustrating a shape of a main body drum.
FIG. 4 is a front view of FIG. 1, showing an opening in a downward state.
FIG. 5 is a flowchart showing the entirety of the automatic coke strength measuring apparatus according to the present invention.
FIG. 6 is a diagram showing a connection unit between each unit and the device in FIG. 5;
FIG. 7 is a view showing an example of a double-sided opening / closing lid.
FIG. 8 is a diagram showing the front of a conventional coke strength tester.
9 is a side view of FIG. 8, illustrating the operation of the tester.
[Explanation of symbols]
1 Conveying means (belt conveyor)
2 Presence confirmation sensor 3 Sampler 4 Sieving means (Trommel)
5 Weighing device 6 Main drum 7 Sieving means 8 Weighing device 9 Operation command means (arithmetic control device)
DESCRIPTION OF SYMBOLS 10 Opening / closing lid 11 Actuator 12 Rotary shaft 13 Coupling 14 Reduction gear 15 Drive motor 16 Crankshaft 17 Bearing 18 Double rotary joint 19 Supply port 20 Supply pipe 21 Rotation sensor 22 Discharge position detection sensor 23 Closed state detection sensor 24 Open state detection sensor 25 Angle for Raising Coke 26 Crank Arm 27 Mounting Arm 28 Belt Conveyor 29 Belt Feeder 30 Belt Feeder 31 Skip Hoist 32 Vibration Chute 33 Intermediate Hopper 34 Belt Conveyor 35 Belt Conveyor 36 Lid Fixing Stopper 37 Hinge 38 Test coke sample (sample)
39 Crushed sample 40 Manual lid 41 Coke 42 Opening

Claims (3)

A coke strength testing machine comprising a covered cylindrical body for accommodating a sample, and a rotating means for rotating the cylindrical body around its axis,
An opening having the same width as the length in the longitudinal direction and an opening / closing lid provided on the outer periphery of the cylindrical body, and a mounting arm for pressing or pulling the opening / closing lid against the opening, and a crankshaft for rotating the mounting arm And a crank arm connected to the crankshaft, and an actuator for rotating the crank arm. A rotation sensor for detecting the number of rotations of the cylindrical body and a sample loading position, a discharge position detection sensor for detecting a position for discharging the sample, an open state detection sensor for detecting an open state of the open / close lid, and a closed state. 2. A sensor according to claim 1, further comprising: a closed state detecting sensor for detecting said signal; and operation command means for receiving signals from said sensors to stop and restart operation of said tubular body and to open and close said open / close lid. The coke strength tester described. Presence confirmation sensor for detecting the presence or absence of coke on the conveying means, a sampler for sampling a part of the existing coke, sieving means for sifting the collected coke, and weighing the coke sieved by the sieving means A weigher, a strength tester according to claim 1 or 2, which measures the strength of the test coke sample adjusted by the weigher, and a sieving means for sieving the crushed sample discharged from the strength tester, A weighing device for weighing each sample weight sieved by the particle size by the sieving device, a calculator for calculating the strength of the sample from the weighed value, and a transport unit for returning the weighed sample to the transport unit, An automatic measuring apparatus for measuring coke strength, comprising: a plurality of sensors for operating the above-mentioned units and devices; and an operation commanding unit for receiving signals from these sensors and instructing the operation of the units and devices.

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