JPH052054U - Powder sampling sample transfer device - Google Patents

Abstract

(57) [Abstract] [Purpose] A powder sampling sample in which the length of the transfer line-the transfer distance-can be extended in a sample transfer device that pumps the slurry sample into the transfer line through high-pressure washing water A carrier device is provided. [Structure] A branch three-way switching valve 54 that branches the line into a sample analysis container system 50 and an external drain system 52 is provided at the end of the transfer line 20. Then, by controlling the operation timing of the branch three-way switching valve 54 in accordance with the flow of the slurry sample in the transfer line, the cleaning water and the pooled water are discharged to the external drain system 52.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a powder sampling sample transfer device for transferring a sampling sample of the powder to a sample analyzer in order to measure or analyze the particle size and the like of the powder.

[0002]

[Prior Art]

 Generally, as shown in FIG. 2, in this type of sample transporting apparatus, first, a powder sample in the process piping system 10 is passed through a sample sampling apparatus 12 including a wet sampler, a tube pump, etc. The sample is taken in and slurried in the tank 14 via the circulation pump 16. Next, a part of this slurry sample is cut out to the transfer line 20 under the pressure of the circulation pump 16 via the three-way switching valve 18, and further the slurry sample is supplied from the cleaning water pipe 24 via the three-way switching valve 22. The high-pressure washing water is pressure-fed from the transfer line 20 into the container 28 of the sample analyzer 26. Then, the slurry sample in the container 28 is supplied to the analyzer 32 via the circulation pump 30 to measure or analyze the particle size and the like.

[0003]

[Problems to be solved by the device]

 However, the above-described conventional sample transport device has a basic drawback as described below. That is, first, general properties of slurry sample transportation will be described. First, in the vicinity of the starting end portion A (see FIG. 2) of the transportation line 20, as shown in FIG. A slurry sample (original slurry sample) 34 in the as-prepared state exists in the area A1 of the line 20, and in the area A2 on the downstream side thereof, the cleaning water for pressure feed, the residual cleaning water and the residual cleaning water Of the mixed water 36, while the washing water 38 for pumping exists in the upstream area A3. Further, in the vicinity of the end B of the transfer line 20, as shown in FIG. 4, the original slurry sample 34 is diluted into a relatively high-concentration slurry sample 40 and relatively low-concentration slurry samples 42 and 44. While being dispersed in the regions B1, B2, B3, respectively, the mixed water 36 and the cleaning water 38 are present in the outer regions B4, B5, respectively.

By the way, when the slurry sample (see FIG. 4) near the terminal portion B as described above is introduced into the sample analysis container 28, first of all, the amount of the accumulated water in the mixed water 36, in particular, The mixture of water and the slurry sample overflows the container 28 due to the high volume. Secondly, since the slurry sample is dispersed in the diluted samples 40 to 44 within the range B1 to B3, even if the overflow does not occur, the representativeness of the sample is impaired.

It is obvious that the first difficulty makes it impossible to operate the sample analyzer 26, and the second difficulty reduces the analysis accuracy or reliability. However, both the first and second problems are aggravated as the length of the transport line 20 increases. For this reason, the conventional sample transporting device of this type has a limit in transporting distance, and in reality, it cannot be extended to 30 to 40 m or more.

Therefore, an object of the present invention is to convey a slurry sample over a long distance without overflowing the container and impairing its representativeness when the slurry sample is introduced into a sample analysis container. An object of the present invention is to provide a powder sampling sample transfer device that can be configured easily.

[0007]

[Means for Solving the Problems]

 The powder sampling sample transfer device according to the present invention cuts a sample to be slurried in a sample dispersion tank through a circulation pump into a transfer line through the circulation pump, and cuts the sample through high pressure washing water. In a powder sampling sample transfer device that pressure-feeds from the transfer line into the sample analysis container, a branch three-way switching valve that branches the transfer line into the sample analysis container system and the external drain system should be provided at the end of the transfer line. Characterize.

[0008]

According to the powder sampling sample transfer device of the present invention, the operation timing of the branch three-way switching valve is controlled in accordance with the flow of the slurry sample in the transfer line, so that cleaning accompanying sample transfer and cleaning can be performed. Water and pool water can be discharged to the external drain system. Therefore, the overflow of the sample analysis container can be prevented, and the slurry sample can be transported over a long distance without impairing the representativeness of the sample.

[0009]

【Example】

 Next, a typical embodiment of the powder sampling sample conveying device according to the present invention will be described in detail below with reference to the accompanying drawings. For convenience of explanation, the same components as those of the conventional configuration shown in FIGS. 2 to 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

First, since the sample transporting device of the present invention has the same basic configuration as the conventional configuration shown in FIG. 2, this point will be briefly described, and then the features of the present invention. Will be described. That is, in the sample transport device of the present invention, as shown in FIG. 1, the powder sample in the process piping system 10 is sampled into the sample dispersion tank 14 by the sample sampling device 12, and this sample is fed to the circulation pump 16. The slurry sample is then cut out to the transfer line 20 via the three-way switching valve 18, and is sent under pressure into the sample analysis container 28 by the high-pressure washing water supplied via the three-way switching valve 22. It is configured as follows.

However, in the sample transport apparatus of the present invention, a branch three-way switching valve 54 is provided at the terminal end B of the transport line 20 to branch the transport line 20 into the sample analysis container system 50 and the external drain system 52. ing.

In such a configuration, the slurry sample near the terminal end portion B of the transfer line 20 has regions B4 and B5 where the mixed water 36 and the cleaning water 38 exist, as shown in FIG. 4 described above. The high-concentration slurry sample 40 and the low-concentration slurry samples 42 and 44 exist in the areas B1, B2, and B3 between the two, respectively. Here, the operation timing of the branch three-way switching valve 54 is set to the slurry sample 40. , 42, 44 corresponding to the flow of water, the mixed water 36 and the washing water 38, as well as the water contained in the slurry samples 40, 42, 44 are effectively discharged to the external drain system 52. be able to. Therefore, almost all of the cut slurry sample is introduced into the sample analysis container 28, and the slurry sample does not overflow from the sample analysis container 28. That is, the slurry sample can be transported over a long distance without overflowing the sample analysis container 28 and without impairing its representativeness. Moreover, the sample transporting device of the present invention can achieve the above-described operation only by providing the branch three-way switching valve 54, and thus can have an extremely simple structure. Next, an experimental example of the sample transport device of the present invention having the above-mentioned configuration will be described.

Experimental Example The conveying line 20 has an inner diameter of 8 m / m and an extension distance of 150 m, and the source pressure of the washing water is 2 Kg / cm ² . An analysis experiment of a slurry sample was conducted by using the sample transfer device having the configuration shown in FIG. 1 set to g. As a result, the slurry sample with the cut-out length set to 2 m was dispersed and diluted to a length of about 10 m after being conveyed 150 m. That is, this shows that the length of the area A1 in FIG. 3 was 2 m, but the length of the area B1 + B2 + B3 in FIG. 4 was 10 m. Therefore, by operating and controlling the branch three-way switching valve 54 as described above, it was possible to effectively discharge the accumulated water and the cleaning water, and to collect substantially all the cut-out slurry sample. Since the transport distance can be increased by increasing the source pressure of the wash water, it is possible to easily extend the transport distance to 200 to 300 m by setting the source pressure appropriately to a high pressure. There was found.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-mentioned embodiments, and various design changes can be made without departing from the spirit of the present invention. Of course.

[0015]

[Effect of the device]

 As is apparent from the above-described embodiments, the powder sampling sample conveying device according to the present invention cuts out a sample to be slurried in the sample dispersion tank through the circulation pump into the conveying line through the circulation pump. With the powder sampling sample transfer device that pressure-feeds the sample from the transfer line into the sample analysis container via high-pressure washing water, the transfer line is branched to the sample analysis container system and the external drain system at the end of the transfer line. By configuring the branch three-way switching valve to operate, the operation timing of the branch three-way switching valve is controlled according to the flow of the slurry sample in the transfer line, so that the washing water and the accumulated water accompanying the sample transfer can be controlled. Can be properly discharged to the external drain system. Therefore, when the slurry sample is introduced into the sample analyzer, it can be transported over a long distance without overflowing from the sample analyzing container and without impairing its representativeness. Moreover, the sample transfer device of the present invention achieves the above-mentioned effect only by providing the branch three-way switching valve, so that the device can be manufactured easily and at low cost, and its practical effect is extremely large.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a powder sampling sample transfer device according to the present invention.

FIG. 2 is a system diagram showing a conventional powder sampling sample transport device.

FIG. 3 is a vertical cross-sectional view of the transport line showing the properties of the slurry sample in the vicinity of the starting end portion A of the transport line.

FIG. 4 is a vertical cross-sectional view of the transport line showing the properties of the slurry sample in the vicinity of the terminal end portion B of the transport line.

[Explanation of symbols]

10 process piping system 12 sampling device 14 sample dispersion tank 16 circulation pump 18, 22 three-way switching valve 20 transfer line 24 wash water pipe 26 sample analyzer 28 sample analysis container 30 circulation pump 32 analyzer 34 original slurry sample 36 mixed water 38 Wash water 40 High-concentration slurry sample 42, 44 Low-concentration slurry sample 50 Sample analysis container system 52 External drain system 54 Branch three-way switching valve

Claims (1)

[Claims for utility model registration] [Claim 1] A sample collected by slurrying in a sample dispersion tank via a circulation pump is cut out to a transfer line via the circulation pump and is transferred via high-pressure washing water. In a powder sampling sample transfer device for pressure-feeding from a line into a sample analysis container, a branch three-way switching valve for branching the transfer line into the sample analysis container system and an external drain system is provided at the end of the transfer line Powder sampling sample transfer device.