JPH07104232B2 - Sampling device - Google Patents

Description

TECHNICAL FIELD The present invention relates to various synthetic resin manufacturing industries such as paint resins, adhesive resins, and ink pastes, food manufacturing industries such as mayonnaise and chocolate, cosmetics manufacturing industries such as creams, and the like. The present invention relates to a sampling device used in the process of handling a fluid.

[Background technology]

In processes such as paint production lines that handle materials, collect a part of the fluid from the system in which it exists, such as a reaction tank, and inspect its properties to ensure quality at all times. There is.

As one of the sampling devices for that purpose, Japanese Patent Laid-Open No. 59-2314
Some are described in Japanese Patent No. 34. This device comprises a cylinder having a piston inside and a capsule (collecting tool) adapted to be attached to and detached from the peripheral portion of the cylinder. The cylinder is mounted on a peripheral wall of the system such as a reaction tank and communicates with the system through an extraction port which 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) to which the mouth of the capsule is attached and detached is provided at another location. The piston advances in the cylinder to close the extraction port, and retracts to suck the fluid into the cylinder. An air passage is formed on the outer peripheral portion of the piston, and the forward movement of the piston causes the vacuum source and the inside of the capsule to communicate with each other through the air passage to create a vacuum inside the capsule. The fluid is sucked into the cylinder as a sample while blocking the communication inside the capsule.

The above-mentioned known sampling device requires not only a vacuum device separately but also the tips of the piston and the cylinder are formed so as to abut against each other in a conical shape. Objects are squeezed and adhere and remain persistent.
Due to this residual, a gap is formed between the cylinder and the piston, and the fluid from the system tends to leak downward through the gap, causing malfunction, and if there is a residual, it will be treated next. If the animals are different, they will cause contamination.
In addition, since the tip of each of the piston and the cylinder is formed in a conical shape, a wide passage cannot be formed between the piston and the cylinder unless the piston is retreated significantly.
As a result, the passages that tend to become narrower are more likely to be clogged with dust and the like, and contamination is more likely to occur. It must be operated with an operating force, and the operation also takes time, which is inconvenient, and the operation for creating the vacuum also takes time. Since the ventilation passage for applying a vacuum is provided in the outer peripheral portion of the piston, the fluid remains in this ventilation passage, and when the next different fluid is handled, contamination may occur. become. In the capsule, the inside of the capsule is once evacuated, and the fluid is sucked by the stored constant vacuum force. Therefore, a vacuum device is indispensable, and the vacuum force in the capsule is the suction force. Since it becomes weaker as the pressure increases, if the fluid has a high viscosity or contains solids, not only the suction may take time, but also the suction may be difficult.
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 washed by its own function, and moreover, there is no residue on the inlet (collecting port). It may be clogged.

[Object of the Invention]

In view of the above circumstances, the present invention eliminates the need for a vacuum device as the fluid extractor, and prevents the adhesion of solid matter or the like between the cylinder and the piston to prevent malfunction such as leakage. Makes it easy for even high-viscosity fluids to flow,
Make extraction in a short time with a light operating force,
Moreover, by eliminating the residue of solids and the like on the cylinder and piston to prevent contamination by different samples, the sampling tool has a self-draining function in addition to the suction function. It is an object of the present invention to provide a sampling device that is easy to take out and uses the suction / exhaust function for cleaning to prevent clogging of the entrance.

[Disclosure of Invention]

In order to achieve the above-mentioned object, the present invention is a fluid extractor for extracting fluid in the system through an extraction port provided in a peripheral wall of the system in which fluid is present,
The extractor is equipped with a collecting tool that is detachably attached to collect a part of the fluid extracted by the extracting means as a sample. A cylinder having an inner space formed straight up to the inside, the inner space communicating with the inside of the system through the extraction port and having a communication port on its peripheral wall that communicates with the sampling port of the sampling tool; And a straight columnar piston that reciprocates by an operation from the outside, and the extraction port and the communication port are both closed by the forward movement of the piston of the fluid extraction means,
Further, the fluid is extracted from the inside of the system by retreating and is temporarily held in the cylinder of the extraction means and the communication port is opened, and the sampling tool has a tip opening and the sampling port. And a piston provided in the cylinder that reciprocates by an operation from the outside, and when the piston retreats, the fluid temporarily held in the cylinder of the fluid extracting means is It is configured to suck and collect in the cylinder through the communication port and the sampling port, and the piston of the sampling tool is rotated in the cylinder by the rotation operation of the piston rod, and the piston rod. A lock groove having a groove bottom shape that is eccentric to the circle formed by the outer peripheral surface of the rod and inscribes in the circle is formed on the outer peripheral portion of A lock piece biased by a spring in the same direction as the piston rod of the Linda is provided so as to advance and retreat in a direction orthogonal to the axis of the piston rod. The forward / backward movement of the piston is locked by the engagement of the lock piece inside, and the piston rod is rotated from the locked state so that the lock piece comes to the outer peripheral surface of the rod outside the lock groove. Then, the gist of the sampling device is such that the lock is released.

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

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

As shown in FIG. 1, the sampling system includes a fluid extractor A, a sampler B, and a first carrier C.
A sample take-out means D and a second carrying means E.
The fluid extractor A extracts a part of the fluid from a system (a reaction tank in this embodiment, but it may be a transport pipe of the fluid) 10 containing the fluid. Sampling means B
In this method, the empty collecting tool 40 is exposed to the fluid extractor A and a part of the fluid is sampled from the fluid extracting means A to the empty sampler 40 as a sample. The first transport means C is a sampling tool after sampling.
40 is conveyed from the sample collecting means B to the sample extracting means D.
The sample extracting means D extracts the sample from the sampler 40 after the sample is collected. The second carrying means E carries the empty collecting tool 40 from the sample extracting means D to the sample collecting means A. Among these means, the components particularly related to the sampling device will be described in detail below.

As shown in FIGS. 1 and 2, the fluid extractor A includes a cylindrical cylinder 12 attached to the bottom peripheral wall 11 of the reaction layer 10. Inside the cylinder 12, the peripheral wall 11
It is communicated with the inside of the reaction tank 10 through an extraction port 13 opened at. Inside the cylinder 12, there is a first sealing 14 on the outer periphery of the tip.
The pistons 15 arranged in two stages (or one stage) are provided so as to be capable of reciprocating in the vertical direction. The tip end surface of the piston 15 is a push surface 16 orthogonal to the central axis of the piston. A mounting cylinder 17 is joined in series to the lower end of the cylinder 12, and a drive means 18 composed of a cylinder and a piston is mounted to the lower end of the mounting cylinder 17 and its piston rod
19 is joined to the lower end of the piston 15. The piston 15 is a fall prevention mechanism provided on the upper peripheral wall of the mounting cylinder 17.
While the natural lowering is prevented by 20, the maximum rising position is restricted by the flange 21 provided at the lower end. The stopper 22 of the fall prevention mechanism 20 is
It is movable back and forth so as to obtain a state of standing by in the recess 23 formed in the peripheral wall and a state of protruding from the recess 23. That is, when the piston 15 is at the uppermost portion, the stopper 22 projects downward of the flange 21 to restrict the natural lowering of the piston 15 as shown in the figure, and the piston 15 moves up and down by the action of the drive means 18. At this time, it waits in the recess 23 so as not to interfere with the vertical movement of the piston 15. The fall prevention device 20 prevents the piston 15 from naturally descending due to the pressure in the reaction tank 10 or the head pressure of the fluid. A second sealing 24 is provided on the upper surface of the flange 21, and when the piston 15 is at the uppermost position, the second sealing 24 hits the lower surface of the cylinder 12 and prevents fluid from leaking out of the cylinder 12. . Cylinder 12
A communication port 25 that expands in a taper shape outward is opened on the peripheral wall of the communication port 25. When the piston 15 is at the lowest position as shown in FIG. It is positioned so as to be below the communication port 25. Communication port 25
A set recess 26 that is larger than the communication port 25 is provided on the outer side of the. The set concave portion 26 has a straight round hole shape, and the wall surface on the back side thereof serves as the contact receiving surface 27 of the sampling tool 40.

Next, the sampling means B will be described. Same sampling means B
Is a setting means B ₁ of a sampling tool that receives an empty sampling tool 40 from the second transport means E and faces the fluid extraction means A, and then transfers the sampling tool 40 after sampling to the first transport means C, The empty sampling tool supported by the setting means B ₁ is set in the fluid extractor A and then the set is removed, and the sampling tool attachment / detachment means B ₂ and the empty sampling set in the fluid extractor A are set. The tool 40 comprises a sampling operation means B _{3 for} performing a sampling operation.

As shown in FIGS. 1 and 4, the setting means B ₁ of the sampling tool is provided with a disc-shaped indexing rotor 30. The rotor 30 is a drive shaft horizontally and rotatably supported on the side of a cylinder 12 provided in the fluid extractor A.
It is attached to one end of 31 and is rotated by the action of the drive shaft 31. On the outer periphery of the rotor 30, U
The V-shaped receiving grooves 32 are arranged at intervals of 120 degrees. The rotor 30 stops every 120 degrees, but
At this stop position, each receiving groove 32 faces the lowest end position P ₁ and two positions P ₂ and P ₃ above it, as shown in FIG. The rotor 30 receives the new sampling tool 40 from the second conveying means E in the receiving groove 32 at the P ₂ position and rotates 120 degrees to carry the sampling tool 40 to the P ₃ position. This P ₃
In the position, the collection tool 40 faces the communication port 25 provided in the cylinder 12 of the fluid extractor A. Rotor 30
Further rotates 120 degrees to carry the sampling tool 40 that has completed the sampling operation to the P ₁ position, and causes the sampling tool 40 to fall naturally into the first transporting means C. The rotor drive shaft 31
Is driven to rotate by an indexing motor 33 and an index unit 34, as shown in FIG.

The sampling tool 40 is provided with 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 the tip end surface thereof has the extraction means A
The third sealing 44 that is in close contact with the contact receiving surface 27 of
The insertion portion 43 projects from the center. Third ceiling
Reference numeral 44 prevents leakage of the sample at the time of sample collection and invasion of air from the outside to ensure the sample collection. A thin straight through hole at the center of the insertion portion 43 is defined as a sampling port 45. piston
A protrusion 46 is provided at the tip of the piston 42,
It is designed to prevent the clogging of the sampling port 45 by entering and exiting the sampling port 45 when advancing and retracting. A guide groove 47 is formed on the outer peripheral portion of the front end of the cylinder 41 so as to guide the rolling of the sampling tool 40 by being fitted to a guide rail of a second carrying means E described later, and a removable cap is provided on the rear end portion. 49 is attached via the fourth sealing 48. By removing the cap 49, the inside of the sampling tool 40 can be washed. This is advantageous in that precision cleaning can be performed in advance, especially when handling a sample that is not susceptible to contamination. The piston 42 is provided with the front and rear two-stage fifth sealings 50, 50 on the outer peripheral portion thereof, and the front portion is an extruded taper surface 51 which is tapered toward the front. The front inner peripheral surface of the cylinder 41 serves as a taper-shaped extrusion receiving surface 52 with which the extrusion tapered surface 51 abuts when the piston 42 advances. Piston 42
The rod 53 has a lock groove 54 on a part of its outer circumference. The lock groove 54 has a circle which is smaller than the outer circle of the piston rod 53 and which is eccentric and inscribes the outer circle.
That is, the groove 54 is gradually deeper in the circumferential direction from a reference portion (upper end portion in the figure) on the outer peripheral surface of the rod 53, and is deepest at a position shifted by 180 degrees from the reference portion. On the other hand, the cap 49 is formed with a radial through hole,
A lock piece 56 biased from the back by a spring 55 is fitted into this through hole. The lock piece 56 is fitted into a deep position of the lock groove 54 when the piston rod 53 is retracted, and locks the piston rod 53 so as to stop at the retracted position. When the rod 57 is rotated by the handle 57 provided at the rear end portion of the piston rod 53, the lock piece 56 is moved from the deep position to the shallow position of the lock groove 54 and then the rod outer peripheral surface continuous with the groove 54. Therefore, the lock piece 56 is retracted against the urging force of the spring 55 to escape from the lock groove 54 so that the lock is released. As a guide for the unlocked position, both the cap 49 and the piston rod 53 are marked with alignment marks.When this alignment mark is aligned by rotating the handle 57, the lock piece 56 will be located outside the lock groove 54. Located in. This allows the piston rod 53 to move back and forth. This locking mechanism prevents the sample from leaking outside due to the unnecessary movement of the piston 42 due to the weight of the piston 42 and the rod 53 and the external force applied to the handle 57.

The collecting tool attaching / detaching means B ₂ is provided with a cylinder 60 for driving the collecting tool, as shown in FIGS. 1 and 5. The cylinder 60 is provided on a fixed frame 61 and reciprocates an advancing / retreating body 62 attached to the cylinder 60 in the horizontal direction. The advancing / retreating body 62 connects the opposing frame portions 63 and 64 to each other.
It is integrated by 65, and the sampling tool is
It has a holding groove 66 for receiving and holding the caps 49 of 40 from the direction orthogonal to the axial direction thereof. When the cap 49 is fitted in the holding groove 66 and the sampling tool 40 is held by the advancing and retracting body 62, the cylinder 60 reciprocates to move the sampling tool 40 forward and backward. When the third sealing 44 of the collecting tool 40 hits the contact receiving surface 27 provided at the communication port 25 of the fluid extracting means A by this forward movement, the insertion portion 43 at the tip of the collecting tool 40 communicates with the communicating port 25 of the fluid extracting means A. It is inserted with a little clearance inside, and the setting of the sampling tool 49 is completed (see FIGS. 2 and 3). However, it may also be adapted to be inserted without gaps.
When the cylinder 60 retracts, the sampling tool 40 moves the fluid extraction means A.
Get out of.

The sampling operation means B ₃ is, as shown in FIGS. 1 and 5,
A cylinder 70 supported by one frame portion 63 of the collecting tool attaching / detaching means B ₂ is provided. The cylinder 70 is a fluid extractor A.
It works to retract the piston 42 of the sampling tool 40 in the state of being set to. That is, the cylinder 70 has a U-shaped frame 72 at the tip of its piston rod 71, and the tip 57 of the frame 72 hooks the handle 57 of the sampling tool 40 to remove the sampling tool 40.
Of the fluid extracting means A by retracting the piston 42 of
A part of the fluid in 12 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 is a space that does not hit the handle 57 that retracts with the piston 42 of the sampling tool 40, that is, the width and length inside the frame 72 are larger than the handle 57, and the U-shaped frame 72 is fed next by the indexing rotor 30. It is designed to receive the handle 57 in the pushed state of the sampling tool 40 that is received,
It has a double-sided open space that allows the collecting tool 40 to fall onto the first transporting means D.

As described above, the collection tool 40 is retained in the transport path 130 while its rod 53 is contracted and is empty. Collection tool 40
Is set so that the lock piece 56 is automatically fitted in the lock groove 54 by rotating the handle 57 and aligning the above-mentioned marking. These sampling tools 40 ...
When the indexing rotor 30 rotates and its receiving groove 32 comes, it is received in the groove 32 one by one. Accepted collecting tool
As shown in FIG. 1, when the indexing rotor 30 is rotated by 120 degrees and stopped, the sampling port 40 of the sampling tool 40 faces the front of the communication port 25 of the fluid extraction means, and at this time, the sampling is performed. The tool cap 49 is received in the detachment means retaining groove 66 (in the retracted position) 66 and the sampling tool handle 57 in the sampling manipulator frame (in the advanced position) 72. Thereafter, the collecting tool 40 is moved forward by driving the detaching cylinder 60, and as shown in FIG. 2, the insertion portion 43 thereof is fitted into the communication port 25 of the fluid extracting means to form the collecting port 45. The communication port 25 comes to communicate. Along with that, the cylinder 41 of the sampling tool
The third sealing 44 is applied to the contact receiving surface 27 of the set recess 26 of the fluid extractor, so that the communication port 25 and the set recess 26 become a completely sealed space. The driving cylinder 70 of the sampling operation means moves forward together with the detaching cylinder 60, and the piston 42 of the sampling tool moves forward. At this point, the fall prevention mechanism 20 provided in the fluid extractor releases the lock of the fluid extractor piston 15 with respect to the flange 21.
15 is pushed down, and the fluid in the reaction tank 10 is extracted into the cylinder 12 through the extraction port 13. When the piston 15 descends to the lowermost portion, the communication port 25 opens and the fluid flows into the communication port 25. At this time, if the piston 15 makes a reciprocating motion several times, the dust and the like at the bottom of the reaction tank 10 will not enter the cylinder 12. After that, the detaching cylinder 60
To the frame 72 by driving only the drive cylinder 70.
Is retracted, the piston 42 of the sampling tool retracts, as shown in FIG. This retreat opens the sampling port 45,
The fluid in the extraction cylinder 12 is sampled from the communication port 25 through the sampling port 45 into the sampling tool 40. Then, the piston 42 of the sampling tool is locked at that position by the lock piece 56 automatically fitting into the lock groove 54 of the rod 53 by the action of the spring 55. In this lock, the sampling tool 40 is the sample extracting means D.
Hold until you reach. After the sample extracting operation, the collecting tool 40 is retracted by retracting the detaching cylinder 60 to release the set for the sampling operation, and the indexing rotor 30 is set to 120.
Receiving groove containing the sampling tool 40 after rotating and sampling
Turn 32 down. Then, the sampling tool after sampling
40 naturally falls, is separated from the fluid extractor A, and is received in the chute 80 which is inclined and bent.

The sampling tool 40 guided by the chute 80 drops to the relay section 85 with its tip facing downward, and before that, the switching pipe 86
It is housed in a capsule waiting inside. Collection tool 40
The air transportation means 81 when housed in this capsule is
Is carried to the sample extracting means D. When the capsule arrives at the sample extracting means D, the collecting tool 40 is taken out there, and as shown in FIG. 6, only a fixed amount of sample is taken out by the measuring means 112. The sample taken out is subjected to an inspection or the like in an inspection unit (not shown) or the like arranged in the station 110 or its vicinity. As a result, if there is an abnormality in the sample, countermeasures can be taken online in real time. Almost all of the sample in the collecting tool 40 is discharged by the remaining amount discharging means 113, and the remaining sample is completely cleaned and removed by the cleaning means 114. The cleaned sampling tool 40 is brought into a state in which the rod 53 is contracted by aligning the cylinder 41 and the rod 53 so that they can be locked by the marking, and is sequentially introduced into the transport path 130 of the second transport means E. Be stocked. These stocked tools 40
When the receiving groove 32 of the indexing rotor 30 rotates, the ... Are received one by one and sent for the next sampling.

As described above, in the sampling device according to the present invention, since the piston provided in the extraction cylinder is formed in a straight columnar shape, the solid matter which the piston tends to adhere to the inner peripheral surface of the cylinder or Highly viscous fluid is scraped out to prevent these from adhering to the inner peripheral surface of the cylinder. As a result, there is no possibility that fluid may leak from the extraction port through the outer circumference of the piston and cause malfunction. With this scraping function, there is no residue in the cylinder, so contamination can be eliminated. This is particularly effective for fluids that do not like contamination in addition to fluids that contain solids. Moreover, if the piston is columnar, it is possible to form a wide passage in the cylinder by simply retracting the piston a little, and it is possible to prevent clogging of dusts more effectively and prevent the malfunction and contamination from occurring, and Highly viscous fluid also flows smoothly, and the piston can be operated with a light force in a short time. There is no concave portion where the fluid remains between the piston and the cylinder, and also from this point, the contamination when the next different fluid is handled is effectively prevented. Since the sampling tool has a self-exclusion function as well as a self-suction function by the driving means, not only does a vacuum device become unnecessary, but the self-exclusion function allows the sample to be taken out easily, Moreover, the inside can be easily washed. Sampling of the above-mentioned sample is not performed by temporarily vacuuming the inside of the sampling tool, and is performed by the pumping force of the cylinder 41 and the piston 42 of the sampling tool 40. Of course, it is possible to collect even a sample having a high viscosity (100 poise or more). If the piston tip of the sampling tool is equipped with a projection for preventing clogging that goes in and out of the sampling port, even if debris or the like gets stuck in the sampling port, it is forcibly removed to prevent clogging securely. You can At the same time, the clogging preventing projections prevent clogging more effectively together with the action of the cleaning liquid when the sampling port is washed.

Incidentally, as shown in FIG. 1, the sampling operation means B ₃ may be provided with an auxiliary cylinder 58 further behind the driving cylinder 70. That is, in the embodiment, in the state where the sampling tool 40 is pressed against the extraction cylinder 12, the piston 42 in the sampling tool 40 is moved to the most retracted position by the drive cylinder 70, that is, the lock groove 54 is the lock piece 56. After moving to the locked position and collecting the sample in the sampling tool 40, the sampling tool 40 is moved to the extraction cylinder 12 with the cylinder 60.
However, when the auxiliary cylinder 58 is used in combination, the drive cylinder 70 is operated so as to stop a little before the last retracted position without fully retracting the piston 42. Then, there will be a margin of stroke from the front position to the last retracted position, and the suction amount corresponding to this remaining stroke will be the sampling tool 40.
Remain inside. Therefore, next, the remaining stroke is supplemented by the operation of only the auxiliary cylinder 58. That is, when the piston rod of the auxiliary cylinder 58 is retracted, this movement is transmitted to the piston rod 53 of the sampling tool 40 via the drive cylinder 70 in the inoperative state, and the sampling tool is
The piston rod 53 of 40 retracts by the remaining stroke. That is, with the sampling tool 40 still in contact with the extraction cylinder 12, only its piston 42 is retracted by the remaining stroke. Due to this retreat, a suction force is generated at the sampling port 45. At this time, the extraction piston 15
Has already risen to the top and closed the inner end of the communication port 25, so there is no sample residue left in the communication port 25, the set recess 26, and the collection port 45, and Is sucked into. The so-called two-stage pulling operation in which the cylinders are combined in two stages effectively prevents the sample from leaking from the sampling port 45 of the sampling tool to the outside, and the communication port of the fluid extractor A.
It is also possible to effectively prevent the contamination and clogging of the sample by eliminating the residual fluid that adheres to the inside of 25 or the like.

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

In the sampling system, the sample collecting means B, the first and second conveying means CE and the sample extracting means D are
It can be configured in place of other mechanical methods. The sealing attached to the pistons 15 and 42 is a normal elastic ring such as an O-ring, but when an adhesive sample remains after cleaning or the sample has a high viscosity (100 poise or more). In the case of handling a sample that swells with an elastic ring, as shown in FIG. 7, the first ring 90 of U-shaped cross section made of fluororesin material and the stainless steel spring inside the ring are used. A sealing material in combination with the second ring 91 is effective. The seal ring arranged in two stages on the piston is 1
It may be a step. Although there is a possibility that the sample may leak from the sampling port of the sampling tool, as shown in FIGS. 8 to 11, if a shutoff mechanism is provided, the leakage can be effectively prevented.
This mechanism includes a breaker 93 that is biased by a spring 92, and a cam shaft 94 that advances and retracts the breaker 93. The spring 92 and the breaker 93
It is incorporated with blind lids 96, 97 in a through hole 95 penetrating the front part of the sampling tool 40 in a direction crossing the front part. The interruption 93 is
The projections 98, 98 on both sides in the circumferential direction are fitted in the recessed grooves 99, 99 of the through hole 95 and are guided so as not to rotate, and the first inclined surface is formed at one axial end thereof. Cam surface
A slide hole 101 having the same size as the sampling port 43 is formed in the vicinity of 100. The cam shaft 94 is provided in a set hole 102 orthogonal to the through hole 95 so as to be movable back and forth, and a slide groove 103 formed on an outer peripheral portion thereof rotates while engaging with a protrusion 104 of one blind lid 96. It is supposed not to. A second cam surface 105 having an inclined surface is formed at the tip of the cam shaft 94 so as to come into contact with the first cam surface 100. As shown in FIG. 11, the cam shaft 94 is pushed back by the contact receiving surface 27 and retracted into the sampling tool 40 when the sampling tool 40 is set in the extraction cylinder 12, and at that time, the second cam When the surface 105 pushes the first cam surface 100, the breaker 93 is retracted, whereby the slide hole 101 coincides with the sampling port 45 and sampling can be performed. On the other hand, when the sampling tool 40 is separated from the extraction cylinder 12 as shown in FIGS. 8 to 10, the force applied to the cam shaft 94 is released, so that the spring 92 moves the breaker 93 forward to slide the slide hole. 101 is disengaged from the sampling port 45 and the shaft of the barrier 93 is
Will be blocked. As a result, even a sample with a low viscosity (particularly 100 poise or less) can be effectively prevented from leaking.

〔The invention's effect〕

Since the sampling device according to the present invention is configured as described above, according to this, a vacuum device is not required as a fluid extraction means, and solid matter or the like adheres between the cylinder and the piston. Is prevented, malfunctions such as leakage are prevented, and even highly viscous fluids easily flow into the cylinder, extraction is performed lightly and efficiently, and sampling in a short time is possible. Moreover, by eliminating the residue of solids and the like on the cylinder and piston, contamination by different samples is prevented, and the sampling tool also has a self-draining function in addition to the suction function. Is easy to take out, and the cleaning function of the suction function prevents clogging of the entrance.

In particular, since the sampling tool is equipped with the above-described lock mechanism including the lock groove and the lock piece, the weight of the piston and rod or the external force applied to the handle causes the piston to move unnecessarily and the sample is externally moved. It is possible to reliably prevent the leakage of water to the outside, and it becomes easy to use.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view of all steps showing one embodiment of a sampling device according to the present invention together with other devices of a sampling system, and FIG. 2 is a side view showing how a sampling tool is set in a fluid extractor. Sectional view, FIG. 3 is a side sectional view showing a state in which a sample is collected in a sampling tool, FIG. 4 is a front view seen from the IV direction in FIG. 1, and FIG. 5 is a detaching means and a collecting operation means. FIG. 6 is a side view, FIG. 6 is a front view showing a more concrete example of the structure of the sample extracting means, FIG. 7 is a sectional view showing a preferred embodiment of the sealing structure, and FIG. FIG. 9 is a vertical sectional view showing a typical embodiment at the time of shutoff, and FIG.
IX line sectional view, FIG. 10 is a sectional view taken along line XX of FIG. 8, and FIG. 11 is a sectional view showing a state in which a sampling tool with a shutoff mechanism is attached to an extraction cylinder to open a sampling port. Is. 10 ... Reactor, 11 ... Peripheral wall, 12 ... Cylinder of fluid extractor, 13 ... Extraction port, 15 ... Piston of fluid extractor, 18 ... Drive means of fluid extractor, 25 ... … Communication entrance
40 ... sampling tool, 41 ... sampling tool cylinder, 42 ... sampling tool piston, 45 ... sampling port, A ... fluid extraction means

Claims (2)

[Claims] 1. A fluid extractor for extracting a fluid in the system through an extraction port provided in a peripheral wall of the system in which the fluid is present, and a detachable unit attached to the extractor. The extractor is provided with a sampling tool adapted to sample a part of the fluid extracted by the extracting means, and the fluid extracting means includes a straight internal space extending to the extraction port. And a cylinder having the same internal space that 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, and the cylinder provided in the cylinder and operated from the outside. It has a straight columnar piston that reciprocates,
The extraction port and the communication port are both closed by the advance of the piston of the fluid extractor, and the fluid in the system is extracted by the retreat and temporarily retained in the cylinder of the extractor. The communication tool is configured so that the communication port is opened, and the sampling tool includes a cylinder having a tip opening as the sampling port, and a piston provided in the cylinder that reciprocates by an operation from the outside. When the piston is retracted, the fluid temporarily held in the cylinder of the fluid extraction means is configured to be sucked and collected into the cylinder through the communication port and the sampling port, and the piston of the sampling tool is the piston. It is designed to be rotated in the cylinder by rotating the rod, and is eccentric to the circle formed by the outer peripheral surface of the piston rod on the outer peripheral portion. And, a lock groove having a groove bottom shape that is inscribed in the same circle is formed, and a lock piece biased in the same rod direction by a spring is provided at a portion of the cylinder through which the piston rod passes. It is provided so as to retreat at right angles to the axis, and when the piston retreats, the forward / backward movement of the piston is locked by engaging the lock piece in the lock groove, and the piston rod is moved from the locked state. A sample collecting device in which the lock is released by rotating and operating the lock piece so as to come to the outer peripheral surface of the rod that is the outside of the lock groove. 2. The sampling device according to claim 1, wherein the piston of the sampling tool is provided with a projection for preventing clogging, which goes in and out of the sampling port, at its tip.