JPH01132928A - Sample collecting apparatus - Google Patents

Abstract

PURPOSE:To prevent the sticking of a solid between a cylinder and a piston, by providing a flowable substance extraction means, a collecting jig, the cylinder and the piston. CONSTITUTION:Both of an extraction port 13 and a communication port 25 are closed by the advance of the piston 15 of a flowable substance extraction means A and the flowable substance in a system is drawn out by the retraction of the piston to be temporarily stored in the cylinder 12 of the means A and, at the same time, the communication hole 25 is opened. A collecting jig 40 is equipped with the cylinder 12 having the opening at the leading end thereof as a collecting port 45 and the piston 15 provided in the cylinder 12 and reciprocatingly moving by the operation from the outside. When the piston 15 is retracted, the flowable substance temporarily stored in the cylinder 12 of the means A is sucked and collected in the cylinder 12 through the communication hole 25 and the collecting port 45. By this method, a vacuum apparatus is dispensed with as the means A and the sticking of a solid between the cylinder 12 and the piston 15 is prevented.

Description

[Detailed Description of the Invention] [Technical Field] This invention is applicable to various synthetic resin manufacturing industries such as paint resins, adhesive resins, and ink pastes, food manufacturing industries such as mayonnaise and chocolate, and cosmetic manufacturing industries such as creams. This invention relates to a sample collection device used in a process that handles fluids.

[Background/Technology]

In processes where fluids are handled, such as in paint production lines, a portion of the fluid is sampled from the system where the fluid exists, such as a reaction tank, and its properties are inspected to ensure quality at all times. ing.

As one of the sample collection devices for this purpose, JP-A-59-2
There is one described in Japanese Patent No. 31434.

This device consists of a cylinder that has a piston inside and a capsule that is attached to the circumference of this cylinder.
It consists of a sampling tool). The cylinder is attached to the peripheral wall of a system such as a reaction tank, and communicates with the system through an extraction port that is an opening at one end. This cylinder is provided with a hole communicating with the vacuum source at one location on its periphery, and a communication port (sample extraction port) into which the mouth of the capsule is attached at another location. The piston moves forward within the cylinder to close the extraction port, and retreats to suck the fluid into the cylinder. This piston has
A ventilation passage is formed on the outer periphery, and when the piston advances, the vacuum source and the inside of the capsule are communicated through the ventilation passage to create a vacuum inside the capsule, and when the piston retreats, the vacuum source and the inside of the capsule are communicated with each other. The fluid sucked into the cylinder is sucked into the capsule as a sample while blocking the water.

The above-mentioned known sampling device not only requires a separate vacuum device, but also has the tips of the piston and cylinder conically shaped so that solids contained in the fluid can be removed. Things get squeezed and stick, and remain persistently.

This residue causes a gap to form between the cylinder and the piston, making it easy for fluids from the system to leak downward through the gap and cause malfunction. If the animal is different, it may cause contamination.

Additionally, since the tips of the piston and cylinder are formed into conical shapes, a wide passage cannot be formed between the piston and the cylinder unless the piston is moved back significantly.
As a result, this passage, which tends to become narrow, becomes easily clogged with debris, which tends to cause layer contamination, and as mentioned above, when the passage is narrow, it becomes difficult for high viscosity fluids to flow, causing the piston to become clogged. It is inconvenient that the operation must be performed with a large operating force and that operation also takes time, and the operation of creating the vacuum also takes time. Since a ventilation passage for applying a vacuum is provided on the outer circumference of the piston, fluid may remain in this ventilation passage, which may cause contamination when handling a different fluid. become. The capsule is designed to once create a vacuum inside the capsule and use this stored vacuum force to suck the fluid, so a vacuum device is of course essential, and the vacuum force inside the capsule can also be applied to the suction. As it progresses, it becomes weaker, so if the fluid has a high viscosity or
If it contains solid matter, it not only takes time to suction it, but it may also be difficult to suction it. Moreover, since the capsule does not have a self-exclusion function, it is not only difficult to take out the collected sample, but also the inside cannot be easily cleaned by its own function.
There is a risk that the sampling port may become clogged with debris.

[Purpose of the invention]

In view of the above circumstances, the present invention eliminates the need for a vacuum device as a fluid extraction means, prevents solid matter from adhering between the cylinder and the piston, and prevents malfunctions such as leakage. It allows even highly viscous fluids to flow easily, allowing extraction to be performed in a short time with light operating force, and also eliminates solid matter remaining in the cylinder and piston to prevent contamination from different samples. In addition to the suction function, the sampling tool also has a self-draining function, making it easy to remove the collected sample. The purpose of the present invention is to provide a sample collection device that avoids

[Disclosure of the invention]

In order to achieve the above object, the present invention provides a fluid extracting means configured to extract the fluid in the system through an extraction port provided in the peripheral wall of the system in which the fluid exists;
A sampling tool is provided which is detachably attached to the extraction means to collect a part of the fluid extracted by the extraction means as a sample, and the fluid extraction means is attached to the extraction port. a cylinder having an internal space formed straight throughout, the internal space communicating with the inside of the system through the extraction port, and a peripheral wall thereof having a remote port communicating with the sampling port of the sampling tool; A straight column-shaped piston is provided inside the fluid extraction means and reciprocated by external operation, and when the piston of the fluid extracting means moves forward, both the extraction port and the long way port are closed, and the piston moves backward. The fluid inside the system is extracted and temporarily retained in a cylinder of the extraction means, and the long way port is opened, and the sampling tool is a cylinder having a tip opening as the sampling port. and a piston provided in the cylinder and reciprocated by an external operation, and when the piston retreats, the fluid temporarily retained in the cylinder of the fluid extracting means is removed from the long way opening and The subject matter is a sample collection device configured to aspirate a sample into its cylinder through a collection port.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.

FIG. 1 shows an embodiment of the sample collecting device according to the present invention together with other devices of the sampling system, and FIGS. 2 to 5 show the main parts of the same device in an enlarged manner.

As shown in FIG. 1, the sampling system includes a fluid extracting means A, a sample collecting means B, and a first conveying means C.
, a sample extraction means, and a second conveyance means E.

The fluid extracting means A extracts a part of the fluid from a system 10 containing the fluid (in this embodiment, it is a reaction tank, but it may also be a fluid transport pipe or the like). Sample collection means B
The empty sampling tool 40 is placed facing the fluid extracting means A, and a part of the fluid is collected from the fluid extracting means A into the empty sampling tool 40 as a sample. The first conveyance means C conveys the sampling tool 40 after sample collection from the sample collection means B to the sample extraction means. The sample extraction means takes out the sample from the sampling tool 40 after the sample has been collected. The second transport means E transports the empty sampling tool 40 from the sample extraction means to the sample collection means A. Of these means, components related to the sample collection device will be explained in detail below.

As shown in FIGS. 1 and 2, the fluid extraction means A includes a cylindrical cylinder 12 attached to the bottom peripheral wall 11 of the reaction tank IO. The inside of this cylinder 12 communicates with the inside of the reaction tank 10 via an extraction port 13 opened in the peripheral wall 11 . Inside the cylinder 12, there is a first
A piston 15 with sealings 14 arranged in two stages (or one stage) is provided so as to be able to reciprocate in the vertical direction.

The tip end surface of the piston 15 is a push-up surface 16 orthogonal to the piston center axis. A mounting tube 17 is connected in series to the lower end of the cylinder 12, and a driving means 18 consisting of a cylinder and a piston is attached to the lower end of the mounting tube 17.
It is joined to the lower end of the. The piston 15 is attached to the mounting tube 1
A fall prevention mechanism 20 provided on the upper circumferential wall of 7 prevents its natural descent, while a flange 21 provided at its lower end restricts its highest position. The stopper 22 of the drop prevention mechanism 20 is movable back and forth so as to be in a waiting state within a recess 23 formed in the peripheral wall of the mounting tube 17 and a state in which it is protruding from this recess 23. That is, when the piston 15 is at the top, the stopper 22 protrudes below the flange 21 as shown in the figure to restrict the natural descent of the piston 15, and the piston 15 moves up and down by the action of the drive means 18. At this time, the piston 15 waits in the recess 23 so as not to interfere with the vertical movement of the piston 15. The drop prevention device 20 is a reaction tank 1
The pressure inside the piston 15 and the head pressure of the fluid act on the piston 15.
prevent natural descent. A second sealing 24 is provided on the upper surface of the flange 21, and a second sealing 24 is provided on the upper surface of the flange 21.
When the cylinder 12 is at the lowest position, the second sealing 24 contacts the lower surface of the cylinder 12 and prevents fluid from leaking out of the cylinder 12. A communication port 25 that tapers outward is opened in the peripheral wall of the cylinder 12. When the piston 15 is at the lowest position as shown in FIG. is the same communication port 25
It is positioned so that it is below the . A set recess 26 that is wider than the communication port 25 is provided on the outside of the communication port 25. This set/seat recess 26 is
It has a straight round hole shape, and the wall on the back side is the sampling tool 4.
0 contact receiving surface 27.

Next, the sample collection means B will be explained. Sample collection method B
The empty collection tool 40 is used as the second fil! The receiver is taken from the conveying means E and placed in front of the fluid extracting means, and then the sampling tool 40 after sample collection is transferred to the first conveying means C. sampling tool attachment/detachment means B2 for setting an empty collection tool in the fluid extraction means A and then removing the same set; and fluid extraction means A
The sampling operation means B causes a sampling operation to be performed on an empty sampling tool 40 set in the .

As shown in FIGS. 1 and 4, the collecting device setting means B is provided with a disk-shaped indexing rotor 30. The rotor 30 is attached to one end of a drive shaft 31 horizontally and rotatably supported on the side of the cylinder 12 provided in the fluid extracting means A.
It is designed to rotate by the action of 1. On the outer circumference of the rotor 30, U-shaped receiving grooves 32 are arranged at intervals of 120 degrees. The port 30 stops every 120 degrees of rotation, and at this stop position, each receiving groove 3
2 faces the lowest position P and two positions P, , P, above it, respectively, as shown in FIG. The rotor 30 is placed in the 21st receiving groove 32 at the P2 position.
11 Receive the new collection tool 40 from the feeding means E and 120
The rotation sampling tool 40 is carried to the P8 position. At this P3 position, the sampling tool 40 faces the communication port 25 provided in the cylinder 12 of the fluid extracting means A. The rotor 30 further rotates by 120 degrees to carry the sampling tool 40 that has completed the sampling operation to the P1 position, and causes the sampling tool 40 to naturally fall into the fill feeding means C. The rotor drive shaft 31 is rotationally driven by an index motor 33 and an index unit 34, as shown in FIG.

The sampling tool 40 includes a cylinder 41 and a piston 42, as shown in the enlarged cross section of FIGS. 2 and 3. The cylinder 41 has a cylindrical shape, and a third seal 44 is provided on the distal end surface of the cylinder 41 in close contact with the abutment receiving surface 27 of the extraction means A.
is attached, and an insertion portion 43 protrudes from the center thereof.

The third sealing 44 prevents the leakage of the sample and the intrusion of air from the outside during sample collection, thereby ensuring that the sample can be sampled reliably. A thin, straight through hole at the center of the insertion portion 43 serves as a sampling port 45 . A protrusion 46 is provided at the tip of the piston 42 and enters and exits the sampling port 45 when the piston 42 moves forward and backward, thereby preventing the sampling port 45 from clogging. On the outer circumference of the front end of the cylinder 41, a second
1M, the collection tool 4 fits into the guide rail of the feeding means E.
A guide groove 47 is formed to guide the transfer of 0, and a removable cap 49 is attached to the rear end via a fourth sealing 48. By removing the cap 49, the inside of the collection tool 40 can be cleaned. This is advantageous because precision cleaning can be performed in advance, especially when handling samples that are sensitive to contamination. The piston 42 is provided with two fifth sealings 50.50 on its outer periphery, front and rear, and has an extruded tapered surface 51 that tapers forward. When the piston 42 moves forward, the front inner circumferential surface of the cylinder 41 is exposed to the extruded tapered surface 51.
This is a tapered extruded receiving surface 52 that abuts against each other. The rod 53 of the piston 42 has a lock groove 5 on a part of its outer circumference.
It has 4. This lock groove 54 is connected to the piston rod 53.
The outer circumference is a circle that is smaller than the outer circumference of , is eccentric, and is inscribed. In other words, the groove 54 has the loft 53
The depth gradually increases in the circumferential direction from the reference portion (the upper end portion in the figure) of the outer circumferential surface of the outer circumferential surface, and is the deepest at a point deviated by 180 degrees from the reference portion. On the other hand, a radial through hole is formed in the cap 49, into which a lock piece 56 biased from behind by a spring 55 is fitted. The lock piece 56 is fitted into the deep position of the lock groove 54 when the piston rod 53 is retracted, and locks the piston rod 53 to be stopped at the retracted position. When the piston rod 53 is rotated by a handle 57 provided at the rear end of the piston rod 53, the lock piece 56 moves from the deep position to the shallow position of the lock groove 54, and then extends to the outer circumferential surface of the rod continuing from the lock groove 54. Therefore, the lock piece 56 escapes from the lock groove 54 while retreating against the biasing force of the spring 55, and the lock is released. As a guide to the unlocked position, alignment markings are provided on both the cap 49 and the piston rod 53, and when the alignment markings are aligned by rotating the handle 57, the lock piece 56 will move out of the lock groove 54. Located in As a result, the piston rod 53
becomes free to advance and retreat. This locking mechanism prevents the piston 42 from moving unnecessarily due to the weight of the piston 42 and the rod 53 or external force applied to the handle 57, thereby preventing the sample from leaking outside.

Method B for attaching and detaching the collection tool! As shown in FIGS. 1 and 5, it is equipped with a cylinder 60 for driving the collection tool. This cylinder 60 is provided on a fixed frame 61, and causes a reciprocating body 62 attached to the cylinder 60 to reciprocate in the horizontal direction. The advancing/retracting body 62 is made by integrating opposing frame portions 63 and 64 with a connecting piece 65.
The distal end thereof has a holding groove 66 for receiving and holding the camp 49 of the collecting tool 40 from a direction perpendicular to its axial direction. When the cap 49 is fitted into the holding groove 66 and the collection tool 40 is held in the reciprocating body 62, the cylinder 6
0 moves back and forth to move the collection tool 40 forward and backward. When the third sealing 44 of the sampling tool 40 comes into contact with the contact receiving surface 27 provided at the communication port 25 of the fluid extraction means A due to this forward movement, the insertion part 43 at the tip of the collection tool is inserted into the communication port 25 of the fluid extraction means A. The collecting tool 49 is inserted into the center with a slight gap, and the centering of the collecting tool 49 is completed (see FIGS. 2 and 3). but,
This may be inserted without any gaps. When the cylinder 60 retreats, the sampling tool 40 is removed from the fluid extracting means A.

Collection operation method B! As shown in FIGS. 1 and 5, the apparatus includes a cylinder 70 supported by one frame 63 of the means B for attaching and detaching the sampling tool. The cylinder 70 functions to retract the piston 42 of the sampling tool 40 set in the fluid extracting means A. That is, the same cylinder 7
0 has a U-shaped frame 72 at the tip of its piston rod 71, and the tip protrusion 73 of this frame 72 hooks the handle 57 of the sampling tool 40 to retract the piston 42 of the sampling tool 40, thereby creating a fluid extracting means. A part of the fluid in the cylinder 12 of A is sucked into the cylinder 41 of the sampling tool 40 as a sample through the communication port 25 and the sampling port 45. This U-shaped frame 72 has a space that does not touch the handle 57 that retreats together with the piston 42 of the collection tool 40, that is, the width and length inside the frame 72 are larger than the handle 57, and the indexing rotor 30 The receiver is adapted to receive the pushed-in handle 57 of the collection tool 40 to be sent next, and has an open space on both sides to allow the collection tool 40 to fall into the tm feeding means. ing.

As described above, the collecting tool 40 is retained in the transport path 130 with its iron 53 contracted and empty. The collecting tool 40 is set so that the lock piece 56 is automatically fitted into the lock groove 54 by rotating the handle 57 and aligning the markings. As shown in FIG. 4, these sampling tools 40 are received one by one into the receiving groove 32 when the indexing rotor 30 rotates and the receiving groove 32 comes.

As shown in FIG. 1, the accepted sampling tool 40 is placed at a point where the indexing rotor 30 has stopped rotating by 120 degrees, and the sampling port 45 of the sampling tool faces in front of the communication port 25 of the fluid extracting means. At this point, the cap 49 of the sampling device is in the retaining groove 66 of the attachment/detachment means (in the retracted position), and the handle 57 of the sampling device is in the frame 7 of the sampling operating means (in the advanced position).
Each acceptance is accepted within 2. Thereafter, the sampling tool 40 is moved forward by the drive of the cylinder 60 for removing and removing it, and as shown in FIG. The communication port 25 is brought into communication. Along with that, the cylinder 4 of the sampling tool
The third sealing 44 of 1 is brought into contact with the contact receiving surface 27 of the set recess 26 of the fluid extraction means, and the communication port 25 and the set recess 26 become a completely sealed space. The drive cylinder 70 of the sampling operation means moves forward together with the detachment cylinder 60, and the piston 42 of the sampling tool moves forward.

At this point, the fall prevention mechanism 20 provided in the fluid extracting means releases the lock on the flange 21 of the fluid extracting piston 15, and the piston 15 is pushed down, causing the fluid in the reaction tank 10 to flow into the extraction port. cylinder 12 through 13
It's pulled out inside. When the piston 15 goes down to the lowest position,
The communication port 25 opens and the fluid flows into the communication port 25.

Note that, at this time, if the piston 15 performs several reciprocating movements, the debris, lumps, etc. at the bottom of the reaction tank 10 will not enter into the cylinder 12. After that, the cylinder 60 for desorption
When the frame 72 is moved backward by driving only the drive cylinder 70 while leaving the frame 72 as it is, the piston 42 of the sampling tool moves backward, as shown in FIG.

This retreat opens the collection port 45, and the fluid in the extraction cylinder 12 is collected from the communication port 25 through the collection port 45 into the collection tool 40. And the piston 4 of the collection tool
2, the lock piece 56 is moved to the loft 53 by the action of the spring 55.
It is locked in that position by automatically fitting into the lock groove 54 of. This lock is held until the sampling tool 40 reaches the sample extraction means. After the above sample sampling operation, the sampling tool 40 is retracted by retracting the membrane application cylinder 60 to release the setting for the sampling operation, and the indexing rotor 30 is rotated 120 degrees to remove the sampling tool 40 after the sample is collected. 40 is placed in the receiving groove 32 facing downward. Then, the sampling tool 40 after collecting the sample falls naturally, and the fluid extraction means A
The receiver is placed in a chute 80 that is detached from the chute 80 and tilts and bends.

The sampling tool 40 guided by the chute 80 falls into the relay section 85 with its tip facing down, and before that, it is accommodated in a capsule waiting within the switching pipe 86. The sampling tool 40 is transported by the pneumatic transport means 81 to the sample extraction means while being accommodated in this capsule. When the capsule reaches the sample retrieval means, the sampling tool 40 is taken out there, and only a certain amount of the sample is taken out by the measuring means 112, as shown in FIG.

The sample taken out is subjected to an inspection at the station 110 or an inspection section (not shown) installed near the station 110 or the like. As a result, if there is an abnormality in the sample, countermeasures can be taken online and in real time. Collection tool 40
Almost all of the sample inside is discharged by the residual amount discharging means 113, and the remaining sample is completely washed away by the cleaning means 114. The cleaned sampling tool 40 is sequentially introduced into the conveyance path 130 of the second conveyance means E with the cylinder 4j and the loft 53 aligned so as to be lockable according to the markings, and the rod 53 is in a retracted state. It will be stocked.

When the receiving groove 32 of the indexing rotor 30 rotates, these stocked collecting tools 40 are received one by one and sent for the next collection.

As mentioned above, in the sample collection device according to the present invention, the piston provided in the extraction cylinder is formed in a straight cylindrical shape, so that the piston can prevent solid matter or other objects from adhering to the inner circumferential surface of the cylinder. Scrape out highly viscous fluids to prevent them from adhering to the inner peripheral surface of the cylinder. This eliminates the risk of fluid leaking from the extraction port through the outer periphery of the piston and causing malfunction. This scraping function eliminates any residue within the cylinder, thereby eliminating contamination. This is particularly effective for fluids containing solids and fluids that are sensitive to contamination. Moreover, when the piston is columnar, a wide passage can be formed in the cylinder by simply retracting the piston a little, making it difficult for debris to clog and more effectively preventing malfunction and contamination. Even highly viscous fluids flow smoothly, and the piston can be operated with light force in a short time. There is no recess in which fluid remains between the piston and the cylinder, and from this point of view as well, contamination is effectively prevented when a different fluid is handled next time. The sampling tool has a self-exclusion function as well as a self-suction function by means of a driving means, so not only does a vacuum device become unnecessary, but also the self-exclusion function allows the collected sample to be easily taken out. Moreover, the inside can be easily cleaned. The above sample collection is not done by creating a vacuum inside the sampling tool and then using the vacuum force.
Since the pumping force is generated by the action of the cylinder 4 toviston 42 of the sampling tool 40, it is possible to collect not only low-viscosity samples but also particularly high-viscosity samples (100 voids or more).

If the tip of the piston of the sampling tool is equipped with a protrusion to prevent clogging that moves in and out of the sampling port, even if debris or the like tries to clog the sampling port, it will be forcibly removed and clogging will be reliably prevented. Can be done. At the same time, the clogging prevention protrusion more effectively prevents clogging together with the action of the cleaning liquid when cleaning the sampling port.

Note that, as shown in FIG. 1, the sampling operation means B may be provided with an auxiliary cylinder 58 further behind the drive cylinder 70 thereof.

That is, in the above embodiment, with the sampling tool 40 pressed against the extraction cylinder 12, the drive cylinder 70
After moving the piston 42 in the sampling tool 40 to the most retracted position, that is, the position where the lock groove 54 is locked with the lock piece 56 and collecting a sample in the cup inside the sampling tool 40, the sampling tool 40 is moved to the cylinder 60. However, when this auxiliary cylinder 58 is used in combination, the driving cylinder 70 must be operated so that the piston 42 does not fully retract but stops slightly before the most retracted position. do. In this case, there will be some margin left in the stroke from the slightly forward position to the most retracted position, and a suction amount corresponding to this remaining stroke will remain in the sampling tool 40.

Therefore, next, this remaining stroke is compensated for by operating only the auxiliary cylinder 58. That is, when the piston rod of this auxiliary cylinder 58 is moved backward,
This movement is transmitted to the piston rod 53 of the collection tool 40 via the drive cylinder 70 in the inactive state, and the collection tool 4
0 piston rod 53 moves back by the remaining stroke.

That is, while the sampling tool 40 remains in contact with the extraction cylinder 12, only the piston 42 is moved back by the remaining stroke. This retreat generates suction force at the sampling port 45. At this time, the extraction piston 1
5 is raised to the top in advance and closes the inner end of the communication port 25, so that the communication port 25 and the set recess 2
6, and any sample residue remaining in the sampling port 45 is sucked into the sampling tool 40. By combining this cylinder in two stages, so-called two-stage pulling operation, the sampling port 4 of the sampling tool is
This effectively prevents the leakage of the sample from 5 to the outside, eliminates residual fluid that adheres to the communication port 25 of the fluid extraction means A, and effectively prevents contamination and clogging of the sample. .

The table below shows the results of actual sampling work using the embodiment of the present invention, together with the results using a commercially available machine as a comparative example, and the results of the conventional example.

Note that sample collection means B of the sampling system
, 1st, 211th! The I transport means C, E and the sample removal means can be constructed in place of other mechanical methods. In addition, the seals attached to each piston 15.42 were conventional elastic rings such as O-rings, but if a sticky sample remains after cleaning or if the sample has a high viscosity (100 voids or more). In cases where an elastic ring is used to handle a sample that would swell, as shown in Fig. A sealing material in combination with the second ring 91 is effective. The seal rings arranged in two stages on the piston may be arranged in one stage. There is a risk that the sample may leak from the sampling port of the sampling tool, but as shown in Figures 8 to 1,
As shown in Figure 1, providing a shutoff mechanism effectively prevents leakage. This mechanism includes an interrupter 93 biased by a spring 92 and a camshaft 94 that advances and retracts the interrupter 93.

The spring 92 and the interrupter 93 are incorporated together with blind covers 96 and 97 in a through hole 95 that passes through the front part of the collection tool 40 in a transverse direction. The interrupter 93 has protrusions 98 and 98 on both sides in the circumferential direction that are recessed in the through hole 95. A99, 99 are fitted into each other to be guided so as not to rotate, and a first cam surface 1 having a slope shape is provided at one end in the axial direction.
00, and a slide hole 101 of the same size as the sampling port 43 is formed near it. The camshaft 94
is provided in a set hole 102 perpendicular to the through hole 95 so as to be able to move forward and backward, and is prevented from rotating while a slide groove 103 formed on its outer periphery engages with a protrusion 104 of one blind cover 96. ing. A slanted second cam surface 105 is formed at the tip of the camshaft 94.
It comes into contact with the first cam surface 100.

The camshaft 94 is connected to the sampling tool 40 as shown in FIG.
When it is set in the extraction cylinder 12, it is pushed back by the contact receiving surface 27 and retracted into the sampling tool 40, and at that time, the second cam surface 105 pushes the first cam surface 100, so that the interrupter 93 is As a result, the slide hole 101 aligns with the sampling port 45 and sampling becomes possible. On the other hand, when the sampling tool 40 separates from the extraction cylinder 12, as shown in FIGS. 8 to 10, the force applied to the camshaft 94 is released, and the spring 92 causes the interrupter 93 to move forward and slide. The hole 101 is removed from the sampling port 45 and the shaft portion of the interrupter 93 comes to close the sampling port 45. Thereby, even leakage of samples with low viscosity (especially 100 voids or less) can be effectively prevented.

〔Effect of the invention〕

Since the sample collecting device according to the present invention is configured as described above, it eliminates the need for a vacuum device as a means for extracting a fluid, and prevents solid matter from adhering between the cylinder and the piston. This prevents malfunctions such as leaks, and also makes it easier for even highly viscous fluids to flow into the cylinder, allowing extraction to be carried out efficiently and sampling in a short time. ,Moreover,
By eliminating solid matter remaining in the cylinder and piston, contamination by different samples is prevented, and because the sampling tool has a self-ejection function in addition to a suction function, the collected sample is Easy to take out
What's more, the cleaning action of the suction and discharge function prevents debris from clogging the inlet.

[Brief explanation of the drawing]

Fig. 1 shows an overview of the entire process of an embodiment of the sample collecting device according to the present invention together with other devices of the sampling system, and Fig. 2 shows how the sampling tool is inserted into the fluid extraction means. Fig. 3 is a side sectional view showing how the sample is collected into the sampling tool, Fig. 4 is a front view seen from the ■ direction in Fig. 1, and Fig. 5 is the tiering means and sampling operation. FIG. 6 is a front view showing a more specific example of the sample extraction means, FIG. 7 is a sectional view showing a preferred embodiment of the sealing structure, and FIG. 8 is a side view showing the sample extraction means. A vertical cross-sectional view of an additional embodiment of the shutoff mechanism when it is shut off, FIG. 9 is IX of FIG.
- IX line sectional view, Figure 10 is the XX line sectional view of Figure 8,
FIG. 11 is a cross-sectional view showing how the sampling port is opened by attaching the sampling device with a blocking mechanism to the extraction cylinder. 10... Reaction tank 11... Peripheral wall 12... Cylinder of fluid extraction means 13... Extraction port 15... Piston of fluid extraction means 18... Drive means of fluid extraction means 25. ...Communication port 40...Collection tool 41...Cylinder of the collection tool 42...Piston of the collection tool 45...Sampling port A...Representative of fluid extraction means Patent attorney Takehiko Matsumoto 6th Figure 11

Claims (3)

[Claims] (1) A fluid extracting means configured to extract the fluid in the system through an extraction port provided on the peripheral wall of the system in which the fluid exists, and a fluid extracting means that is detachably attached to the extracting means. The liquid extracting means includes a sampling tool configured to collect a part of the fluid extracted by the means as a sample, and the fluid extracting means has an internal space formed straight up to the extraction port. , a cylinder whose internal space communicates with the inside of the system through the extraction port and has a communication port on its peripheral wall that communicates with the sampling port of the sampling tool; When the piston of the fluid extraction means moves forward, both the extraction port and the communication port are closed, and when the piston retreats, the fluid inside the system is extracted. The sampling device is configured such that it is temporarily retained in a cylinder of the extraction means and the communication port is opened, and the sampling device includes a cylinder whose tip opening is the sampling port, and a cylinder provided within the cylinder that can be operated from the outside. and a piston that reciprocates at the same time, and when the piston retreats, the fluid that is temporarily retained in the cylinder of the fluid extraction means is sucked and collected into the cylinder through the communication port and the collection port. sample collection device. (2) The sample collecting device according to claim 1, wherein the piston of the sampling tool is provided with a clogging-preventing protrusion at its tip end that moves in and out of the sampling port. (3) The piston of the sampling tool is configured to be rotated within the cylinder by a rotational operation on the piston rod, and the outer circumference of the piston rod is eccentric to the circle formed by the outer circumference of the rod. In addition, a lock groove is formed with a groove bottom shape inscribed in the same circle, and a lock piece biased in the direction of the piston rod by a spring is provided at a location where the piston rod of the cylinder passes. The piston is provided to move forward and backward perpendicular to the axis of the piston, and when the piston retreats, a lock piece engages within the lock groove, thereby locking the forward and backward movement of the piston,
The lock is released by rotating the piston rod from the locked state so that the lock piece comes to the outer peripheral surface of the rod outside the lock groove. The sample collection device according to paragraph 2 or paragraph 2.