JP2016125902A - Sampling device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sampling device that can sample while keeping airtightness and capable of preventing lowering the operation efficiency of a process line and the like.SOLUTION: A sampling device for sampling powder from an airtight chamber includes: a case 11 covering an opening 3h formed on piping 3 and air-tightly blocking the opening 3h from the outside; and a shaft member 15 in which the top end part is located inside the case 11 and the base end part is located outside of the case 11. The shaft member 15 has the top end inserted into the piping 3 and includes a sampling part 16 for sampling powder. The case 11 includes an expansion and contraction portion which can be expanded and contracted and including a shaft member support part 13s for supporting the shaft member 15. The shaft member support part 13s of the expansion and contraction part 13 restricts a relative movement of the shaft member 15 to the axial direction with respect to the shaft member support part 13s.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sampling device. More specifically, the present invention relates to a sampling device that is provided in piping and used for sampling powder.

  In process lines and the like for producing powders of organic and inorganic materials and powders used in the field of food materials, substances produced in each process flow through piping and the like and are supplied to each facility. In such a process line or the like, process management is performed by examining the state of a substance manufactured in each process by sampling the substance from a pipe or the like.

  On the other hand, a product manufactured in a process line or the like may react with oxygen in the outside air when it comes into contact with the outside air, and it is required to avoid contact with the outside air as much as possible when sampling.

  A method as shown in FIG. 4 has been developed as an apparatus for sampling powder flowing through a pipe or the like in such a process line (see Patent Document 1).

  As shown in FIG. 4A, the powder sampler A includes a case 100 surrounding a hole formed in the process line P, and includes an instrument for sampling the powder therein. A cup 101 that can be inserted into and removed from a hole formed in the process line P is provided in the case 100. The cup 101 is fixed to a shaft 104 provided so as to be movable back and forth with respect to the hole. The shaft 104 has a base end supported by a bearing 105 so as to be slidable and rotatable along the axial direction. For this reason, the cup 101 can be inserted into the process line P by moving the shaft 104 toward the hole. Therefore, if the shaft 104 is rotated so that the opening of the cup 101 faces upward, the powder flowing in the process line P can be received by the cup 101 and sampled. On the other hand, the cup 101 can be detached from the process line P by retracting the shaft 104 from the hole. Then, after removing the cup 101 from the process line P and rotating the shaft 104 so that the opening of the cup 101 faces downward, the sampled powder can be supplied to the hopper 102 for collecting the sampled powder.

  As shown in FIG. 4B, the powder sampler B is also provided with a case 110 surrounding a hole formed in the process line P, and an instrument for sampling the powder is provided therein. A shaft member 114 is provided in the case 110 so as to be inserted into and removed from a hole formed in the process line P. The shaft member 114 is supported by a bearing 115 so as to be slidable and rotatable along the axial direction. The shaft member 114 is provided with a notch h that is recessed from the side surface thereof at the distal end. For this reason, if the shaft member 114 is moved toward the hole, the portion where the notch h is formed can be inserted into the process line P. Therefore, if the shaft member 114 is rotated so that the notch h faces upward, the powder flowing in the process line P can be received by the notch h and sampled. On the other hand, if the shaft member 114 is retracted from the hole, the portion where the notch h is formed can be detached from the process line P. If the shaft member 114 is rotated so that the notch h faces downward, the sampled powder can be supplied to the hopper 112 that collects the powder.

JP-A-7-110291

  By the way, since both the powder samplers A and B are used in an environment where the bearings 105 and 115 are exposed to powder, damage due to powder entering the bearings 105 and 115 becomes a problem. Therefore, it is important to prevent the powder from entering the bearings 105 and 115.

  By the way, in the case of a bearing that supports only the rotation of the shaft, the relative position between the shaft and the bearing in the axial direction of the shaft does not change. However, when supporting the movement of the shaft in the axial direction like the bearings 105 and 115 of the powder samplers A and B, it is difficult to prevent the powder from entering the bearing. This is because the powder adhering to the shaft may enter the bearing as the shaft moves in the axial direction. Then, there is a possibility that the bearing is worn and damaged by the penetration of the powder.

  In the powder samplers A and B described above, the bearings 105 and 115 support both sliding and rotation of the shaft 104 and the shaft member 114 in the axial direction. Will be damaged in a relatively short time. That is, the powder samplers A and B must be frequently maintained, and the operation of the process line P must be stopped for maintenance, so that the operation efficiency of the process line P is also lowered.

  In the powder sampler A, the bearing 105 also has a function of hermetically sealing between the case 100 and the outside. However, if the powder enters, the bearing 105 cannot maintain airtightness. Then, outside air may enter the case 100 from the bearing 105, and the powder flowing in the process line P may come into contact with the outside air.

  In view of the above circumstances, an object of the present invention is to provide a sampling apparatus that can perform sampling while maintaining airtightness and can prevent a decrease in operation efficiency of a process line or the like.

The sampling device of the first invention is a sampling device for sampling powder from an airtight chamber, the case is provided so as to cover an opening formed in the airtight chamber and to block the opening airtight from the outside, A shaft member provided so that a distal end portion is located in the case and a proximal end portion is located outside the case, and the shaft member is inserted into the hermetic chamber at a distal end of the shaft member, A sampling part for sampling the body, and the case includes an extendable / contractible part provided with a shaft member support part for supporting the shaft member, and the shaft member support part of the extension part is provided with the shaft. It is characterized by restraining relative movement of the shaft member in the axial direction with respect to the member support portion.
The sampling device according to a second aspect of the present invention is characterized in that, in the first aspect, the expandable portion has a bellows structure.
The sampling device of the third invention is the sampling device according to the first or second invention, wherein the hermetic chamber is a flow path through which powder flows, and the shaft member support portion of the telescopic portion is capable of rotating the shaft member around an axis. The sampling section includes a capturing surface for capturing powder, and when the shaft member is rotated around the axis, the sampling section intersects with the flow direction of the powder. The posture can be changed between a sampling state in which the capture surface is disposed on and a discharge state in which the capture surface is inclined to an angle at which powder on the capture surface can be dropped. And
According to a fourth aspect of the present invention, there is provided the sampling device according to the third aspect, wherein the sampling section is formed in a shape capable of closing the flow path when inserted into the flow path in the sampling state.
The sampling device of the fifth invention is characterized in that, in the first, second, third or fourth invention, the airtight chamber is a flow path through which the powder discharged from the continuous firing furnace flows.

According to the first invention, since the shaft member is restrained from moving in the axial direction by the shaft member support portion of the expansion / contraction portion, if the expansion / contraction portion is expanded / contracted, the shaft member is moved in the axial direction along with expansion / contraction of the expansion / contraction portion. Can be moved. Therefore, if the shaft member is moved in the axial direction, the sampling unit can be taken in and out of the hermetic chamber from the opening, so that the powder can be collected from the hermetic chamber by the sampling unit. And since the shaft member support part of an expansion-contraction part has restrained the relative movement to the axial direction of a shaft member, even if it moves an axial member to an axial direction, powder does not enter a shaft member support part. Therefore, damage to the shaft member support portion due to the powder can be prevented, and the durability of the sampling device can be increased. Then, if the hermetic chamber is a process line or the like, it is possible to suppress the operation stop of the process line or the like due to failure of the sampling device or maintenance, and it is possible to prevent a decrease in the operation efficiency of the process line or the like.
According to the 2nd invention, the structure of an expansion-contraction part can be made into a lightweight and simple structure. Moreover, since the stretchable part itself does not have a sliding part, the durability of the sampling device can be increased.
According to the third aspect of the present invention, if the sampling section in the sampling state is placed in the flow path, the powder flowing through the flow path can be placed on the capture surface. And if a sampling part is extracted from a flow path and a sampling part is made into a discharge state, the powder on a capture surface can be dropped below from a sampling part. Therefore, the powder can be sampled by collecting the powder that has fallen from the capture surface of the sampling unit. And since the shaft member support part restrains the movement of the shaft member in the axial direction, even if the shaft member is supported so as to be rotatable around the axis, the intrusion of the powder can be prevented. It is possible to prevent a decrease in airtightness caused by the intrusion of the water.
According to the fourth invention, the time for sampling a predetermined amount of powder can be shortened, so that the sampling efficiency can be increased.
According to the fifth aspect, since the powder can be sampled in an airtight state, it is possible to prevent the product quality from being deteriorated due to the sampling.

It is a schematic explanatory drawing of the sampling apparatus 10 of this embodiment, Comprising: (A) is sectional drawing, (B) is a BB line arrow directional view of (A). It is operation | movement explanatory drawing of the sampling apparatus 10 of this embodiment, (A) is explanatory drawing of the sampling state which is sampling the powder F from the piping P, (B) is explanatory drawing of a discharge state. It is a schematic explanatory drawing of the rotary kiln 2 which employ | adopted the sampling apparatus 10 of this embodiment. It is a schematic explanatory drawing of the sampling apparatus of a prior art example.

  The sampling apparatus of the present invention is an apparatus for sampling powder produced in equipment such as a process line, and can sample powder with the equipment kept airtight.

  The equipment in which the sampling device of the present invention is used is not particularly limited. For example, it manufactures product transportation piping that flows continuously, lines that cannot be released by being operated at reduced pressure or above atmospheric pressure, equipment that has a sealed structure that prevents oxidation and contamination, and high-purity metal powder by carrier gas reaction. Examples thereof include continuous firing furnaces such as process lines and rotary kilns, filtration / separation / classification devices, and the like.

  Further, in this specification, the “airtight chamber” means the whole having a space that is airtightly blocked from the outside. For example, a reaction vessel or a powder that is kept airtight, a pipe for conveying powder, a chute or a pipe for charging or collecting a product, and the like are also included in the “airtight chamber” in this specification.

  In the following description, a case where the sampling device of the present invention is provided in a pipe for conveying powder fired in a rotary kiln will be described as a representative.

  In addition, in this specification, “to keep the equipment airtight” means not only the case where the inside of the equipment and the inside of the sampling apparatus are maintained in a state of being completely airtightly shut off from the outside at the place where the sampling device is provided, This is a concept that includes a case where a slight amount of outside air flows into the sampling device from the outside. For example, when the sampled powder is taken out from the sampling device to the outside, a state where the sampling device and the outside are slightly communicated with each other is also included in the state in which the equipment is kept airtight in the present invention.

  The powder sampled by the sampling apparatus of the present invention is not particularly limited, but is suitable for sampling powder of a hard material having a small particle size or a corrosive material. It is suitable for sampling a powder containing particles having a particle size of 100 μm or less, particularly a powder containing particles having a particle size of several tens of μm or less.

(Outline of equipment)
First, before describing the sampling device 10 of the present embodiment, the facility 1 including the sampling device 10 of the present embodiment (hereinafter simply referred to as the sampling device 10) will be described.

  As shown in FIG. 3, the facility 1 includes a rotary kiln 2 that bakes raw materials to produce a product. This rotary kiln 2 can manufacture the baked product by heating and baking the raw material input from the raw material input part 2a inside the kiln main body 2c.

  A pipe 3 is connected to the product discharge part 2 b of the rotary kiln 2. The pipe 3 is disposed so that its axial direction is substantially vertical. The powdered product manufactured in the rotary kiln 2 (hereinafter simply referred to as “powder F”) is discharged from the product discharge section 2b of the rotary kiln 2 and put into the pipe 3, and falls in the pipe 3 for sampling. Supplied to the zone.

  As shown in FIG. 3, a sampling device 10 is provided in the middle of the pipe 3. By appropriately sampling the powder F falling on the pipe 3 by the sampling device 10, the firing state in the rotary kiln 2 is confirmed. And the operating state of the rotary kiln 2 is adjusted according to the state of the sampled powder F so that the powder F of desired quality can be obtained.

  For example, when firing in the rotary kiln 2, the residence time (from raw material charging to discharging) may take several tens of hours. Under such operating conditions, it is possible to adjust the operating state of the rotary kiln 2 so that the powder F having a desired quality can be obtained by sampling the powder F every 15 minutes to 1 hour. Become.

(Sampling device 10)
As shown in FIGS. 1 and 3, the sampling device 10 is attached to a place where the pipe 3 is vertical.

  As shown in FIG. 1, an opening 3 h is provided in a portion of the pipe 3 where the sampling device 10 is provided. The inside of the pipe 3 communicates with the outside through the opening 3h.

(Case 11)
A case 11 of the sampling device 10 is provided so as to cover the opening 3h of the pipe 3. Specifically, the main body 12 of the case 11 is fixed to the pipe 3 so as to cover the opening 3h.

  The main body 12 is a hollow, substantially cylindrical member. The main body portion 12 has an axial end portion (left and right end portion in FIG. 1) as an opening, and is fixed to the pipe 3 so that the opening of the base end portion covers the opening 3h.

  The main body 12 includes a sampling tray 12h for discharging the sampled powder F to the outside. The sampling tray 12h is connected to a rotary valve or the like, and can discharge the powder F to the outside while keeping the outside and the inside of the main body 11a airtight. Of course, the method of discharging the powder F to the outside from the sampling tray 12h in a state where the outside and the inside of the main body 12 are kept airtight is not limited to the above method.

  As shown in FIG. 1, a telescopic part 13 is provided at the tip of the main body part 12. The expansion / contraction part 13 is provided so as to airtightly close the distal end opening of the main body part 12. The stretchable part 13 has a bellows structure and can be stretched and contracted along the axial direction of the main body part 12. Specifically, the expansion / contraction part 13 has a tip plate 13 a at the tip thereof, and includes a bellows part 13 b having a bellows structure between the tip plate 13 a and the tip of the main body part 13. When the tip plate 13a moves along the axial direction of the main body portion 12, the bellows portion 13b is provided so as to expand and contract with the movement.

  Further, the distal end plate 13 a of the extendable part 13 is connected to a guide rod 14 provided on the outer surface of the main body part 12. The guide rod 14 guides the expansion / contraction of the expansion / contraction part 13, and is provided so that the expansion / contraction direction thereof is parallel to the expansion / contraction direction of the expansion / contraction part 13 (that is, the axial direction of the main body 12). Specifically, the cylinder body 14 a is fixed to the outer surface of the main body 12 so that its axial direction is parallel to the axial direction of the main body 12. And the front-end | tip plate 13a of the expansion-contraction part 13 is connected with the front-end | tip of the rod 14b. Therefore, if this guide rod 14 is provided, the expansion / contraction part 13 can be expanded and contracted in a stable state.

  In addition, in the member formed in the bellows structure, what has a fine hole etc. may be used for the raw material which comprises a bellows structure. However, the bellows portion 13b of the sampling device 10 of the present embodiment is formed of a material that does not have air permeability. For example, a rubber-based material, a nylon-based resin, or the like can be used as the material for the bellows portion 13b. In addition, when a high-temperature gas flows with the powder F, a heat-resistant material such as a fluorine resin material or a heat-resistant stainless steel material is used as the material for the bellows portion 13b.

(Shaft member 15)
As shown in FIG. 1, a shaft member 15 is provided inside the case 11. The shaft member 15 has a base end supported by the distal end plate 13 a of the expandable portion 13 so that the axial direction thereof is parallel to the axial direction of the case 11. That is, the shaft member 15 is provided such that its axial direction is parallel to the expansion / contraction direction of the expansion / contraction part 13. Moreover, the shaft member 15 is disposed so as to be positioned at the same height as the opening 3 h of the pipe 3.

  The shaft member 15 is supported at the base end portion by a shaft member support portion 13 s provided on the distal end plate 13 a of the extendable portion 13. Specifically, the shaft member support portion 13s restricts the movement of the shaft member 15 in the axial direction (fixes the movement), but supports the shaft member 15 in a state where the rotation around the shaft is possible.

  A handle member 15 h is provided on the base end of the shaft member 15, that is, on the outer side of the distal end plate 13 a of the extendable portion 13. The handle member 15h is used when the shaft member 15 is rotated around the axis or the shaft member 15 is moved in the axial direction.

For example, a bearing that supports general rotation can be used as the shaft member support portion 13s.
In order to prevent the powder F from entering the shaft member support portion 13s, it is desirable to provide a dust seal inside the shaft member support portion 13s.
Furthermore, in order to increase the airtightness of the shaft member support portion 13s, it is desirable to provide a seal member such as an O-ring or an X ring inside the shaft member support portion 13s.

(Sampling unit 16)
As shown in FIG. 1, a sampling unit 16 that samples the powder F is provided at the tip of the shaft member 15. The sampling unit 16 has a structure capable of receiving and capturing the powder F falling on the pipe 3. Specifically, the sampling unit 16 includes a capturing surface 16a formed on a flat surface for capturing powder, and a wall 16b provided around the capturing surface 16a. For this reason, if the sampling part 16 is put in the pipe 3 with the capturing surface 16a facing upward (sampling state), the powder F can be captured in the space formed by the capturing surface 16a and the wall 16b ( (See FIG. 2A). If the shaft member 15 is rotated in a state where the powder F is captured and the capturing surface 16a is rotated 90 degrees or more (discharge state), the powder F can be dropped from the sampling unit 16 downward. (See FIG. 2B).

  As described above, in the sampling device 10 of the present embodiment, since the shaft member 15 is restrained from moving in the axial direction by the shaft member support portion 13s of the stretchable portion 13, if the stretchable portion 13 is stretched, the stretchable portion The shaft member 15 can be moved in the axial direction along with the expansion and contraction of 13. Therefore, if the shaft member 15 is moved in the axial direction, the sampling part 16 can be taken in and out of the pipe 3 from the opening 3h of the pipe 3, so that the powder F falling in the pipe 3 is collected by the sampling part 16. can do.

  And since the shaft member support part 13s of the expansion-contraction part 13 has restrained the relative movement to the axial direction of the shaft member 13, even if the shaft member 13 is moved to an axial direction, the powder F supports a shaft member. The part 13s is not entered. Therefore, the shaft member support portion 13s can be prevented from being damaged by the powder F, so that the durability of the sampling device 10 can be increased. Then, since the frequency | count and period when operation | movement of the rotary kiln 2 is stopped for failure and maintenance of the sampling apparatus 10 can be shortened, the fall of the operation efficiency of the rotary kiln 2 can be prevented.

(About sampling work)
An operation of sampling the powder F from the pipe 3 by the sampling apparatus 10 of the present embodiment having the above structure will be described.

  First, in a state where sampling is not performed, the expansion / contraction part 13 is in an extended state, and the sampling part 16 is disposed at a position separated from the pipe 3 (see FIG. 1). In this state, the sampling unit 16 is located above the sampling tray 12 h of the main body unit 12. Hereinafter, the state in which the sampling unit 16 is disposed at this position is referred to as a retracted state (see FIG. 1).

  When sampling from the above state, the operator holds the handle 15h and puts the sampling unit 16 in the sampling state. In this state, the handle 15h is pushed in, and the expansion / contraction part 13 is contracted. Then, the shaft member 15 moves along the axial direction, and the sampling unit 16 is inserted into the pipe 3 from the opening 3h of the pipe 3 (FIG. 2A).

  When the sampling unit 16 is inserted into the pipe 3, the powder F is captured by the sampling unit 16 if the sampling unit 16 is disposed in the falling path of the powder F falling inside the pipe 3.

  When a predetermined time elapses, the operator pulls the handle 15h to extend the extendable portion 13. Then, the shaft member 15 moves along the axial direction, and the sampling unit 16 is extracted from the opening 3h of the pipe 3 (see FIG. 2B).

  When the sampling unit 16 extracted from the opening 3h of the pipe 3 is moved to the retracted position and the handle 15h is rotated, the shaft member 15 rotates and the sampling unit 16 also rotates. Then, when the handle 15h is rotated until the sampling unit 16 is discharged (see the dotted line in FIG. 2B), the powder F captured by the sampling unit 16 is dropped from the sampling unit 16 onto the sampling tray 12h. And collected by the sampling tray 12h.

  When the captured powder F is discharged onto the sampling tray 12h, the handle 15h is rotated to bring the sampling unit 16 into a sampling state.

  When the amount of the powder F collected by the sampling tray 12h reaches a predetermined amount, the sampling is finished. The sampling unit 16 is held in the retracted state and is maintained in that state until the next sampling.

  On the other hand, if the amount of the powder F is insufficient, the above sampling is repeated, and the above operation is repeated until the amount of the collected powder F reaches a predetermined amount. When the amount of the sampled powder F reaches a predetermined amount, the sampling unit 16 is held in the retracted state and is maintained in that state until the next sampling.

(About the stretchable part 13)
In the above example, the case where the stretchable part 13 has a bellows structure has been described, but the structure of the stretchable part 13 is not particularly limited as long as it can be stretched along the axial direction of the case 11. For example, a structure in which a plurality of cylindrical members are nested and can be expanded and contracted, that is, a so-called telescopic structure can be adopted as the structure of the expandable portion 13. On the other hand, if the stretchable part 13 has the bellows structure as described above, the stretchable part 13 can have a light and simple structure. Moreover, since there is no sliding part on the stretchable part 13 itself, the durability of the sampling device 10 can be increased.

(About the sampling unit 16)
The shape of the sampling unit 16 is not limited to the above shape as long as the powder F can be captured. For example, the sampling part 16 may be formed only by the capture surface 16a without providing the wall 16b. Further, the capturing surface 16a of the sampling unit 16 may have a slight depression.

  In particular, it is preferable that the sampling unit 16 is formed so as to be approximately the same shape as the cross-sectional shape of the flow path of the pipe 3 and slightly smaller, because the sampling time can be shortened. The powder F discharged from the rotary kiln 2 or the like does not flow continuously at a constant flow rate, but the powder F falls apart in the pipe 3. Moreover, the timing at which the powder F falls and the position at which the powder F falls in the pipe 3 are both different. For this reason, if the sampling unit 16 is small, it takes time and the number of times to sample a predetermined amount of the powder F. However, if the sampling unit 16 is shaped as described above, when the sampling unit 16 is inserted into the pipe 3, the inside of the pipe 3 is almost closed by the sampling unit 16. Then, almost all of the powder F falling in the pipe 3 can be captured, so that the time for sampling a predetermined amount of powder is shortened. Since the number of times of sampling can be reduced, the sampling efficiency can be increased.

  The sampling state of the sampling unit 16 is not limited to the above state as long as the powder F can be captured. For example, if the pipe 3 is not arranged vertically, the powder F can be captured by arranging the capture surface 16a so as to intersect the direction in which the powder flows in the pipe 3. This state also corresponds to the sampling state of the sampling unit 16.

  Further, the discharge state of the sampling unit 16 is not limited to the above state as long as the powder F can be discharged from the capturing surface 16a. For example, if the capture surface 16a is a flat surface and does not have the wall 16b, the powder F can be dropped from the sampling unit 16 even if the capture surface 16a is slightly inclined from the horizontal state. . This state also corresponds to the discharge state of the sampling unit 16.

(About the handle member 15h)
The handle member 15h has a structure that can be held by a person to push and pull the shaft member 15 in the axial direction (that is, move the expansion / contraction part 13 in the expansion / contraction direction) or rotate the shaft member 15. The structure is not particularly limited. In particular, a structure capable of grasping the rotation amount of the shaft member 15 according to the attitude of the handle 15h, in other words, the attitude of the sampling unit 16, is preferable. For example, as shown in FIGS. 1 and 2, a D-shaped handle is adopted as the handle 15h, and the handle 15h is made to be a shaft member so that the handle 15h faces the vertical direction when the sampling unit 16 is in the sampling state. 15 (see FIGS. 1 and 2A). Then, in a state where the sampling unit 16 is rotated 90 degrees (discharge state), the handle 15h becomes horizontal (see the dotted line in FIG. 2B). Therefore, the state of the sampling unit 16 can be grasped by the attitude of the handle 15h.

(About airtightness)
In the sampling device 10 of the present embodiment, the opening 3 h of the pipe 3 is airtightly closed by the case 11. In order to improve the airtightness of the opening 3 h of the pipe 3, a lid member that can close the opening 3 h may be provided in the sampling unit 16 or the shaft member 15. For example, if a lid member is provided at the tip of the sampling unit 16, the opening 3h of the pipe 3 can be airtightly closed by the lid member while the sampling unit 16 is detached from the pipe 3. Further, if a cover member is provided on the shaft member 15 on the proximal end side relative to the sampling section 16, the opening 3h of the pipe 3 can be airtightly closed by the cover member in a state where the sampling section 16 is inserted into the pipe 3. .

(Sampling automation)
In the above example, the case where sampling is performed by manually moving the expansion / contraction part 3 and the shaft member 15 has been described. However, the sampling apparatus 10 of the present embodiment can also automate sampling.
For example, if a cylinder mechanism (such as an air cylinder or a hydraulic cylinder) is provided instead of the guide rod 14 described above, the expansion / contraction of the expansion / contraction part 3, that is, the insertion / removal of the sampling unit 16 into / from the pipe 3 can be automated.
Further, if a device for rotating the shaft member 15 such as a rotary actuator is provided at the base end of the shaft member 15, the rotation of the shaft member 15, that is, the posture change of the sampling unit 16 can be automated.
Therefore, if a cylinder mechanism is provided instead of the guide rod 14 and a rotary actuator or the like is provided at the base end of the shaft member 15 and the operation of both is controlled, the powder F is automatically moved in the same manner as manual sampling. Can be sampled. Thus, if sampling is automated, an advantage is obtained that the production status of the product in the rotary kiln 2 can be automatically monitored by linking with the automatic analyzer.

(About the shaft member support portion 13s and the sampling portion 16)
In the above example, the case where the sampling unit 16 performs sampling of the powder F and discharge of the powder F by changing the posture between the sampling state and the discharge state with the rotation of the shaft member 15 has been described.

  However, the method by which the sampling unit 16 samples the powder F and the method for discharging the powder F are not limited to the above methods. For example, the sampling unit 16 is provided so that it can be swung in the vertical direction with respect to the tip of the shaft member 15 and the capturing surface 16a is horizontal when swung upward. In this case, the powder F can be sampled by inserting the sampling unit 16 into the pipe 3 while the sampling unit 16 is swung upward. Further, if the sampling unit 16 that samples the powder F is extracted from the pipe 3 and then the sampling unit 16 is swung downward, the powder F can be discharged from the sampling unit 16. In this case, the sampling unit 16 can be swung using a wire or the like. If it is a wire etc., even if there is a sliding part, it is easy to maintain airtightness compared with the case where the shaft member 15 slides. Further, since the damage due to wear or the like is small, the durability of the apparatus can be maintained to some extent.

(About airtight room)
In addition, it is possible to perform sampling from the airtight chamber other than the pipe 3 through which the powder F flows by the sampling device 10 of the present embodiment. For example, if the powder F is accumulated in the container, the sampling unit 16 can be pierced into the accumulated powder F to sample the powder F. Even in this case, if the sampling unit 16 that samples the powder F is detached from the hermetic chamber and the powder F is discharged from the sampling unit 16 by the method described above, the powder F can be recovered.

  The sampling device of the present invention is suitable for a device that samples powder flowing in a pipe or powder that avoids contact with gas.

DESCRIPTION OF SYMBOLS 10 Sampling device 11 Case 12 Main-body part 13 Expansion-contraction part 13b Bellows part 13s Shaft member support part 15 Shaft member 16 Sampling part 16a Capture surface F Powder

Claims (5)

A sampling device for sampling powder from an airtight chamber,
A case that covers an opening formed in the hermetic chamber and is provided to shield the opening from the outside airtightly;
A shaft member provided so that a distal end portion is located in the case and a proximal end portion is located outside the case, and
The shaft member is
It is inserted into the airtight chamber at its tip, and has a sampling unit for sampling powder,
The case is
It has an extendable / contractible part provided with a shaft member support part for supporting the shaft member,
The shaft member support portion of the telescopic portion is
A sampling apparatus characterized by restraining relative movement of the shaft member in the axial direction with respect to the shaft member support portion. The stretchable part is
The sampling apparatus according to claim 1, wherein the sampling apparatus has a bellows structure. The airtight chamber is
It is a flow path where the powder flows along the vertical direction,
The shaft member support portion of the stretchable portion is
The shaft member is supported so as to be rotatable around the axis,
The sampling unit
It has a capture surface for capturing powder,
When the shaft member is rotated around the axis, a sampling state in which the capturing surface is arranged so as to intersect with the flow direction of the powder in the flow path,
The sampling device according to claim 1 or 2, wherein the sampling device is provided so that the posture can be changed between a discharging state in which the capturing surface is inclined to an angle at which powder on the capturing surface can be dropped. The sampling unit
4. The sampling apparatus according to claim 3, wherein the sampling apparatus is formed in a shape capable of closing the flow path when inserted into the flow path in the sampling state. The airtight chamber is
5. The sampling apparatus according to claim 1, wherein the sampling apparatus is a flow path through which powder discharged from a continuous baking furnace flows.