JP2788187B2 - High viscosity sampler - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to environmental protection such as water treatment,
The present invention relates to an apparatus for collecting a sample of a slurry-like or paste-like high-viscosity liquid used in fields such as the chemical industry, the food industry, and the pharmaceutical industry, and particularly to an apparatus for collecting a sample from a flow of the high-viscosity liquid for concentration measurement. .

[0002]

2. Description of the Related Art A method for measuring a slurry concentration by heating and drying a sample collected from a slurry is disclosed in Japanese Patent Application Laid-Open No. 62-25033.
No. 2. The device is connected to a sampling device through an inflow branch and an outflow branch to the main pipe through which the slurry flows, and the tributary slurry is branched from the main slurry of the main pipe to the sample collection device to collect a sample. Is heated and dried, and the weight of the sample before and after drying is measured to measure the concentration of the slurry. By doing so, the concentration of the slurry can be accurately known, so that the slurry can be automatically and accurately processed.

Since the sample after heating and drying adheres to the sample dish as a solid, the sample dish needs to be disposable. However, in the concentration measuring apparatus disclosed in Japanese Patent Application Laid-Open No. 62-250332, A device for forming and supplying a sample dish from aluminum foil as needed is provided. Thus, the measurement of the slurry concentration using the disposable sample dish can be repeatedly performed at a considerably short time interval, so that the automatic processing of the slurry can be accurately performed in real time.

[0004]

The high-concentration sludge has a high viscosity and may be in the form of a paste. In addition, there are paste-type materials used in the food industry. It will be difficult. That is, Japanese Patent Application Laid-Open No.
In the method of extruding a sample by an air cylinder disclosed in -250332, when the sample is paste-like, a part of the sample adheres to the bottom of the piston to be extruded, and a predetermined amount cannot be collected, or even if the sample is collected, the amount of the sample is And there was a great deal of variation, which was a major error factor in the concentration measurement.

[0005] Further, the sample adhered around the sampling outlet at the time of sampling is solidified and accumulated each time sampling is performed, and mixing with the collected sample also causes an error. As a method for solving this problem, a method of washing the vicinity of the sampling port with tap water and drying and treating the sewage after the washing has been proposed in Japanese Patent Application No. 5-245622 by the present applicant. However, the washing is performed on the sample dish and the washing water is dried, so that a large amount of washing cannot be performed sufficiently, and much time and energy are required to dry the washing water. Was. It is easiest to drain the washing sewage as it is, but in the case of sludge, untreated sludge cannot be drained as it is, so it was necessary to dry and evaporate the washing sewage.

The present invention has been made in order to solve the above-mentioned drawbacks, and it is possible to supply a fixed amount of a sample even in the case of a high-viscosity paste sample, and to efficiently remove and remove a residual sample. It is an object of the present invention to provide a sample collection device that can be performed at a time.

[0007]

According to the present invention, there is provided a sampling apparatus, comprising: a branch pipe for branching a slurry from a main pipe through which the slurry flows and returning the slurry to the main pipe; and a first and a second pipe provided on the branch pipe. Two valves, a pump provided between the two valves, a sample supply pipe connected to the first valve and connected to a sample supply nozzle for supplying a sample, and a sample supply pipe located below the sample supply position. Collection means for collecting samples to be discarded,
It is characterized by having a sample discharge pipe connecting the collection means and the second valve.

In the present invention, each of the above two valves is a three-way valve, and the second valve is provided at a position for transporting the sample from the main pipe to the pump, and for transferring waste from the recovery means to the pump. Switchable between transport positions,
Preferably, the first valve is switchable between a position for transporting the sample or waste from the pump to the mains and a position for transporting the sample from the pump to the sample supply tube.

The tip of the sample supply nozzle is constituted by a nozzle tip, the nozzle tip is made of an elastic material and can be replaced, and the sample supply nozzle is provided at the outer periphery of the tip of the sample supply nozzle. A cleaning mechanism for spraying a cleaning liquid to the unit is provided. The above-mentioned collecting means may be configured to collect not only the sample to be discarded but also the washing liquid to be discarded.

[0010] The collecting means may include an inner surface cleaning means for cleaning the inner surface inside, and a liquid level sensor for detecting a liquid level.
Further, a scattering prevention plate for preventing the liquid in the collecting means from being scattered by the sample or the cleaning liquid falling from above can be provided.

[0011]

According to the structure of the present invention described above, even in the case of a paste sample having a high viscosity, a constant amount of the sample can be forcibly supplied by the pump, and the waste cleaning liquid and the waste sample can be supplied to the valve. By switching, it can be returned to the main pipe, so that there is no need to dry the washing wastewater, and the efficiency of the concentration measuring device can be improved.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below in the form of embodiments. FIG. 1 is a schematic configuration diagram showing a heat-drying slurry concentration measuring apparatus according to a preferred embodiment of the present invention. In the box 1, a sample dish supply section 2, a measurement section 3, a sample collection section 4, and a sample diffusion section 5 are provided.
And a sample dish moving mechanism 7 in which the dish disposal section 6 is disposed horizontally.
It is provided along. In the vicinity of the outside of the box 1, a sample supply unit 8 connected to the sample collection unit 4 by piping is provided.

The sample dish supply unit 2 includes a cut press device 2
2 cuts the aluminum sheet from the aluminum sheet supply roll 21 and press-molds to form a sample dish s. Sample dish s
Is the load measuring device 3 of the measuring unit 3 by the sample dish moving mechanism 7.
1 and the empty weight of the sample dish is measured. Next, the sample dish s is sent to the sample collection unit 4 and receives a predetermined amount of sample from the sample supply nozzle 41. Next, the sample is returned to the measuring section 3 again, and the initial weight of the sample is measured by the load measuring device 31.
Then, the sample dish s is sent to the sample diffusing unit 5, and the sample on the sample dish s is spread flat. Thereafter, the sample dish s is returned to the measuring section 3 again, and is dried while being heated and dried by the drying device 32 provided above the load measuring device 31.
In Step 1, the sample weight is measured. The sample weight is sequentially displayed on the display unit 9 provided on the upper part of the box 1.

The drying device 32 preferably irradiates the sample with heat from above. For example, a device using an infrared lamp or the like is used. The vapor or gas generated by drying the sample is discharged to the outside through the exhaust pipe 33 by the blower 34.

The sample supply unit 8 connects a branch pipe 81, a stop valve 82, a three-way switching valve 83, a slurry transport pump 84, a three-way switching valve 85, and a sample supply pipe 86 from the main pipe P through which the slurry flows during sample supply. The sample in the main pipe P is supplied to the sample supply nozzle 41 through the sample supply nozzle 41. The sample supply unit performs the following operation by switching the three-way switching valves 83 and 85 according to the purpose. I do.

(1) Measurement preparation 1 (FIG. 5) The slurry is supplied from the main pipe P to the branch pipe 81, the three-way switching valve 8
3. The fluid flows to the main pipe P via the slurry transport pump 84, the three-way switching valve 85, and the branch pipe 88. (See FIG. 5) In this state, since a slurry having substantially the same composition as the slurry flowing through the main pipe P flows through the branch pipes 81 and 88, a fresh sample can always be collected. At this time,
To prevent the slurry from adhering to the sewage collection pot 42, the sewage collection pot 42 is filled with water to a lower limit position.

(2) Preparation for Measurement 2 (FIG. 6) Next, immediately before sampling, the pump was once stopped, and
The one-way switching valve 85 is switched to the sample supply side, and the pump is turned again. As a result, as shown in FIG.
The sample is supplied from the sample supply nozzle 41 to the wastewater recovery pot 42 via a branch pipe 81, a three-way switching valve 83, a slurry transport pump 84, a three-way switching valve 85, and a sample supply pipe 86. This is because all the previous old samples remaining in the sample supply pipe 86 are discharged and replaced with fresh samples.

(3) At the time of sampling (FIG. 7) The pump 84 is driven for a predetermined time, and after all previous old samples have been discharged, the pump 84 is temporarily stopped. The sample dish s is carried to the sample supply position below the sample supply nozzle 41 by the sample dish moving mechanism 7, and the pump 84 is driven for a predetermined time. Thereby, a predetermined amount of the sample is supplied onto the sample dish s (see FIG. 7). Next, the sample dish s supplied with the sample is
The sample is moved to the load measuring unit 31 by the sample pan moving mechanism 7 and the initial weight is measured. When the sample has been collected, the three-way switching valve 85 is switched, and the slurry flows from the main pipe P through the branch pipe 81, the three-way switching valve 83, the slurry transport pump 84, the three-way switching valve 85, and the branch pipe 88. Through,
The bypass path returns to the main pipe P (see FIG. 5).

(4) Sample Diffusion (FIG. 8) The sample supplied to the sample dish s has a high viscosity when the concentration is high, and does not spread in the sample dish as it is. If it is dried as it is, it takes 2-3 times longer drying time than when it spreads, and even though the sample surface is burnt, undried parts may remain inside, Is also not preferable in terms of measurement accuracy. Therefore, the sample supplied to the sample dish s is sent to the sample diffusion unit 5 by the sample dish moving mechanism 7 after the initial weight is measured, and is diffused. The initial weight is measured first because the diffuser is a system that blows and diffuses air to prevent water from flying or absorbing moisture and changing the concentration by blowing air. is there.

In the case of this embodiment, the sample is spread in the sample diffusion section 5 by first blowing air from the air nozzle to the center of the sample, and moving the air nozzle to move the air spray position to the center of the sample. The sample was spread by gradually expanding from the portion to the outer portion of the sample. Therefore, the tip of the air nozzle just draws a spiral trajectory.

The sample dish s in which the sample has been diffused is sent to the drying section 32 by the sample dish moving mechanism 7, and the drying is started. At this time, the flow of the slurry remains in the bypass path immediately after the sampling (see FIG. 5).

(5) Washing / Recovery (FIG. 9) When the drying of the sample starts, the sample supply unit 8 and the sample collection unit 4 clean and clean the sample supply nozzle 41 and the wastewater collection pot 42 for the next measurement. Collection begins. At this time, the three-way switching valve 83 is switched as shown in FIG. A wastewater discharge path is established to communicate with the main pipe P. Thereby, the sewage in the sewage recovery unit 42 is discharged to the main pipe P. The sample dish s that has been dried is placed in the load measuring unit 31.
, And then carried to the dish discarding unit 6 by the sample dish moving mechanism 7 and discarded in the waste box 61.

Next, the configurations of the sample supply nozzle 41 and the sewage recovery pot 42 which are components of the present invention will be described in detail with reference to FIGS. 2, 3 and 4. FIG.
3 is a cross-sectional view illustrating a configuration of a sample supply nozzle 41. FIG. The sample is discharged from the sample outlet 47 of the nozzle tip 44 at the tip through the nozzle 41. Cleaning water supplied from a water supply source (not shown) is supplied from a cleaning water inlet 43 to a cleaning water outlet 46 surrounded by a cleaning water cover 45 provided in the vicinity of the nozzle tip 44 to clean the nozzle tip 44. It is supposed to.

FIGS. 3A and 3B show the configuration of the wastewater collecting pot 42. FIG. 3A is a partially transparent plan view, and FIG. 3B is a side sectional view. Reference numeral 52 denotes a pot washing ring provided along the inner periphery of the sewage collection pot 42, and washing water supplied from a water supply source (not shown) is provided on the pot washing ring 52 via a washing water inlet 51. It is configured to be discharged from the hole 53 for cleaning the inner surface of the pot. 5
Reference numeral 4 denotes a slurry that falls from the sample supply nozzle 41 or washing water that falls from the washing water outlet 46, and the sewage collection pot 4
2 is a scattering prevention plate for preventing scattering when falling. 55 is an upper limit level sensor for preventing sewage from overflowing from the pot 42;
This is a lower-limit level sensor that detects a level when water is applied beforehand to prevent slurry from adhering to the wastewater 2 and detects wastewater discharge from the pot 42. FIG. 4 shows a pot cleaning ring 52.
It is a partial enlarged view which shows the detail of.

[0025]

[Effects of the Invention] 1. The sampling apparatus of the present invention is preferably a pump (preferably a snake pump or a tube pump).
Forcibly extruded, the amount of sample can be accurately collected by controlling the ON / OFF and the number of rotations of the pump, especially for a sample having a high viscosity.

2. When collecting a sample, a previous sample is discarded in the pot immediately before collection, so that a new sample can be collected at all times.

3. Since sample supply and waste water recovery can be performed by one pump (by switching between two three-way valves), economical and efficient effects are high.

4. Since the cleaning mechanism is provided in the sample supply nozzle, the sample near the sample outlet is free from sticking.
The reliability and accuracy of the concentration measurement value are improved.

5. After the washing water is collected in the collecting pot, it is collected in a single slurry pipe by a pump, so that the nozzle can be sufficiently washed, and new sewage drainage equipment and piping are provided. No need.

6. Even if dripping or leakage from the sample supply nozzle occurs, the sample is collected in the collection pot.
It is possible to prevent the inside of the device from being soiled and to prevent malfunction. In addition, by providing a level sensor on the upper and lower sides of the collection pot, it is possible to output a signal for preventing overflow and idling of the pump.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an embodiment of a heating and drying slurry concentration measuring apparatus according to the present invention.

FIG. 2 is a sectional view showing a configuration of an embodiment of a sample supply nozzle.

FIG. 3 is a diagram showing a configuration of an embodiment of a sewage recovery pot,
(A) is a partially transparent plan view, and (b) is a partially transparent side sectional view.

FIG. 4 is an enlarged view of a portion A in FIG. 3 (b), showing details of a pot cleaning ring of the sewage recovery pot.

FIG. 5 is a view for explaining a first stage of measurement preparation when measuring using the measuring apparatus of FIG. 1;

FIG. 6 is a view for explaining a second stage of measurement preparation when measuring using the measuring apparatus of FIG. 1;

FIG. 7 is a view for explaining a sample collection stage when measurement is performed using the measurement apparatus of FIG. 1;

FIG. 8 is a view for explaining a sample diffusion stage in the case where measurement is performed using the measurement apparatus of FIG. 1;

FIG. 9 shows a cleaning method when measuring using the measuring apparatus of FIG. 1;
The figure explaining a collection stage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Box 2 Sample dish supply part 3 Measurement part 4 Sample collection part 5 Sample diffusion part 6 Dish disposal part 7 Sample dish moving mechanism 8 Sample supply part 9 Display part 10 Operation part 21 Aluminum sheet supply roll 22 Cut press device 31 Load measurement Apparatus 32 Drying device 33 Exhaust pipe 34 Blower 41 Sample supply nozzle 42 Sewage recovery pot 43 Washing water inlet 44 Nozzle tip 45 Washing water cover 46 Washing water outlet 47 Sample outlet 51 Washing water inlet 52 Pot washing ring 53 Pot inner surface cleaning hole 54 Shatterproof plate 55 Upper limit level sensor 56 Lower limit level sensor 61 Waste box 81 Branch pipe 82 Stop valve 83 Three-way switching valve 84 Slurry transport pump 85 Three-way switching valve 86 Sample supply pipe 87 Stop valve 88 Branch pipe 89 Sample discharge pipe s Sample Plate P Main

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-7-103865 (JP, A) JP-A-62-250332 (JP, A) JP-A-59-87337 (JP, A) (58) Investigation Field (Int.Cl. ⁶ , DB name) G01N 1/00-1/20

Claims (4)

(57) [Claims] 1. A branch pipe for branching a slurry from the main pipe through which the slurry flows and returning the slurry to the main pipe, and a first pipe provided on the branch pipe.
And a second two valves, a pump provided between the two valves, a sample supply pipe connected to the first valve and connected to the sample supply nozzle, and a sample supply pipe located below the sample supply position. A high-viscosity sample collecting apparatus, comprising: a collecting means for collecting a discarded sample; and a sample discharge pipe connecting the collecting means and the second valve. 2. The two valves are each a three-way valve,
The second valve is switchable between a position for transporting a sample from a main pipe to the pump and a position for transporting waste from the recovery means from the recovery means to the pump. Wherein said valve is switchable between a position for transporting a sample or waste from said pump to a main pipe and a position for transporting a sample from said pump to said sample supply pipe. The high-viscosity sample collecting device according to the item. 3. The high-viscosity sample collecting apparatus according to claim 1, wherein the tip of the sample supply nozzle is formed of a nozzle tip made of an elastic material. 4. The high-viscosity sample collecting apparatus according to claim 1, wherein the sample supply nozzle includes a cleaning mechanism for spraying a cleaning liquid on an outer peripheral portion of a tip of the sample supply nozzle. .