JPH0514195Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an automatic coke sampling device.

(Prior Art) Coke produced in a coke oven is usually used for steel manufacturing or as a fuel for general households. At that time, it is necessary to analyze and investigate the quality of coke according to the intended use. Generally, in the case of coke for steelmaking, coke quality is determined by drum rotation strength.
Although strength after the CO ₂ reaction is important, what is important when analyzing coke quality is that the average sample size for analysis is 10 kg or more from the coke produced in the thousands of tons per day and tens of tons per kiln. Several 100 kg of the sample is collected, and then divided evenly according to each analysis item (reduction) to prepare samples for analysis. In particular, in the case of coke, analytical values vary depending on the particle size, and usually
Cold strength or strength after CO ₂ reaction has a relationship such that the smaller the particle size, the stronger the strength. For this reason, the method of reduction to create an average sample for analysis is to create a sample for analysis according to the particle size distribution of the original sample.

Measuring the particle size distribution of the original sample, sorting it into particle size categories, and preparing each sample for analysis according to the particle size distribution is done manually, and requires two to three workers depending on the analysis item. Approximately 1 hour is required.

In the production of coke, not only sufficient quality control is required, but it is also important to quickly analyze the quality and provide it to the departments using it, and shortening the analysis time has been a challenge for a long time.

An example of a conventional coke sampling method and device is shown in Japanese Patent Application Laid-Open No. 54-31793, in which a primary sampler and an intermediate hopper are installed in each of a plurality of parallel transport lines, and all intermediate hoppers are By providing one secondary sampler and a sample hopper corresponding to the transportation line, the system aims to improve the operating rate of the device.

Furthermore, Japanese Patent Application Laid-Open No. 122321/1983 discloses that the weight of a sample can be determined by instantly determining the flow rate using a conveyor scale.

(Problems to be Solved by the Invention) As mentioned above, in the reduction work to create an average analytical sample, the work to create an analytical sample according to the particle size distribution of the original sample is (a) for each particle size classification. (b) understanding the particle size distribution composition of the original sample; and (c) preparing an analysis sample according to the particle size distribution, each of which is performed manually by two to three workers. For this reason, there was a problem in that the analysis work took a long time.

Furthermore, the dimensions shown in JP-A No. 54-31793 do not include any description of the reduction that is the aim of the present invention, and the dimensions of JP-A-57-122321 are not intended to be the object of the present invention. It is unsuitable for reducing multiple original samples that have been sieved by particle size.

(Means for solving the problem) The present invention was developed in view of the above situation, and aims to shorten analysis work and reduce labor by automatically preparing samples for analysis according to the particle size distribution structure. The purpose of this invention is to provide a device that can perform the following tasks.

That is, the present invention includes a plurality of sieving devices 1, 1 with different mesh sizes, original sample weighers 4, 4 for each particle size installed below the sieving devices 1, 1, a cutting device 5, which cuts out the original sample according to the reduction ratio. 5, the cutting device has a tapered analysis sample discharge section when viewed from above, and guide blades 12-1, 12-2.
The present invention provides an automatic coke sampling device characterized in that the cutting device is provided with a drive device.

(Example) A detailed explanation will be given below based on an example device shown in the drawings. Fig. 1 is an overall front view of the apparatus according to the present invention, and Fig. 2 is a side view of the main parts. Assume that the fine grains are sieved in order from the left. 2, 2 are original sample hoppers provided for each particle size, 3 are weighing cases for weighing the weight of the original sample in coke units for each particle size, 4, 4 are original sample weighers, and 5, 5 are original sample scalers. A cutting device for preparing a sample for analysis, 6, 6 is a sample weighing device for analysis,
7 is a conveyor for transporting samples for analysis, 8 is a frame which includes the weighing case 3, the original sample weighing device 4,
A cutting device 5 and a sample weighing device 6 for analysis are placed and supported. The analytical sample weigher 6 has a structure that allows the sample to be transferred onto the transfer conveyor by appropriate known means such as rotation after weighing.

13 is an inlet for the original sample, 14 is a feeder, 15 is a sample collector for analysis, and 16 is a bag.

In FIG. 2, the cutting device 5 has a length from the bottom of the original sample hopper 2 to the top of the transfer conveyor 7, is supported by movable legs 9, and the movable legs 9 are connected to a vibration source 10. Configure the drive device.

Further, the original sample weighing device 4 is made vertically movable using a cylinder 11 and the like, and can be freely moved in and out of a through hole provided at the bottom of the cutting device 5. The original sample weighing case 3 has its bottom supported by the original sample weighing device 4 so as to be able to come into contact with and detach from it.
The size thereof is made larger than the through hole provided at the bottom of the cutting device 5.

FIG. 3 is a plan view of the cutting device 5, in which one end near the transfer conveyor 7 in FIG. 2 is formed into a tapered shape, and sample guide blades 12-1, 1
Install 2-2. Guide vanes 12-1, 12-2
By setting the installation angles α and β of the guide vanes 12-1 and 12-2 to different values, and also setting the installation positions of the guide vanes 12-1 and 12-2 at different distances from the tip of the cutting device, it is possible to cut granular samples. To provide a structure capable of cutting out small amounts of one or two pieces at a time without causing clogging. The lengths l1 and l2 of the guide vanes and the gap C between the guide vanes are determined as appropriate depending on the particle size of the sample to be handled.

The inner width B of the tip of the cutting device 5 is preferably about 1.5 times the maximum diameter of the sample to be handled.

(Function) Since the device of the present invention is constructed as described above, it exhibits excellent functions as described below.

An original sample taken from a coke production line is charged into an original sample intake port 13 shown in FIG. The fed original sample is sieved into the finest particles by the sieving device on the leftmost side in the figure using different meshes, and as it moves to the right, coarse particles are sieved out. The sieved original samples are stored in original sample hoppers 2, 2, respectively, and then dropped into weighing cases 3, 3. At this time, the bottom of the weighing case 3 is placed on the original sample weighing device 4 as shown in FIG.
Here, the original sample is weighed for each particle size to determine the composition ratio for each particle size.

Next, depending on the reduction ratio, for example, if 10% of the original sample is to be used as an analysis sample for each particle size, the analysis sample cutting device 5 shown in FIG. 2 is vibrated to gradually remove the original sample. to the right in the diagram. At this time, the original sample weigher 4
In this case, the cylinder 11 is operated in the shrinking direction so that its upper surface is located below the lower surface of the cutting device 5. In this way, the bottom surface of the weighing case 3 comes into contact with the internal upper surface of the cutting device 5, and is subjected to vibration together with the cutting device. Vibration is generated by a vibration generation source 10.

Due to the vibration, the original sample in the weighing case 3 moves to the right tip of the cutting device 5, passes between the guide vanes 12-1 and 12-2 shown in FIG. 3, and then falls from the tip outlet. . Here, the role of the guide blade is to enable the sample to be cut out in small quantities of one or two pieces at a time.

This means that the amount of sample for analysis for each particle size is several kilograms.
Since it is a unit, increasing or decreasing one sample can exceed the target unit weight, so it is essential to accurately cut out the required amount.

The cut sample for analysis is confirmed to have a target weight by the analysis sample weighing device 6 shown in FIG. 2, and then discharged to the transfer conveyor 7.

The analysis sample cut out in the required amount for each particle size is conveyed to the right by the transfer conveyor 7 in FIG. 1, and then put into the analysis sample collector 15 and sent to the analysis work. Prepare samples for multiple analyzes depending on the analysis item.

After collecting the necessary samples for analysis, all of the samples remaining in the weighing case 3 and cutting device 5 are discharged to the transfer conveyor 7, transferred to the left in the figure, and placed in a bag 16 to be returned to the coke production line. Take measures such as:

(Effects of the invention) As explained above, according to the device of the present invention, when an original sample is divided into a plurality of types according to particle size, the composition ratio of each particle size is determined, and a sample for analysis is obtained by reducing the composition according to the ratio. This can be done automatically without manual intervention as in the past, improving work efficiency.

[Brief explanation of the drawing]

FIG. 1 is a front view of the overall configuration of an apparatus according to an embodiment of the present invention, FIG. 2 is a side view of the main parts thereof, and FIG. 3 is a plan view of the cutting device. 1... Sieving device, 2... Original sample hopper, 3... Weighing case, 4... Original sample weighing device, 5... Cutting device, 6... Analysis sample weighing device, 7... Transfer conveyor, 8...Frame, 9...Movable leg, 10...Vibration source, 11...Cylinder, 13...Original sample intake port, 14...
Feeder, 15...Sample collector for analysis, 1
6... Back.

Claims (1)

[Scope of utility model registration request] A plurality of sieving devices 1, 1 with different mesh sizes, and a source sample weighing device 4 for each particle size installed at the bottom thereof.
4, and cutting devices 5 and 5 that cut out the original sample according to the reduction ratio, and the cutting device has a sample ejector for analysis tapered in plan view, and guide vanes 12-1 and 12-2. 1. An automatic coke sampling device, characterized in that a driving device is attached to the cutting device.