CN114072655A - Sampling probe for gas measuring device - Google Patents
Sampling probe for gas measuring device Download PDFInfo
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- CN114072655A CN114072655A CN202080046039.0A CN202080046039A CN114072655A CN 114072655 A CN114072655 A CN 114072655A CN 202080046039 A CN202080046039 A CN 202080046039A CN 114072655 A CN114072655 A CN 114072655A
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- sampling probe
- probe
- vibration
- probe body
- flue
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- 239000000523 sample Substances 0.000 title claims abstract description 165
- 238000005070 sampling Methods 0.000 title claims abstract description 103
- 239000000463 material Substances 0.000 claims abstract description 27
- 238000002955 isolation Methods 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims description 33
- 239000007789 gas Substances 0.000 description 54
- 238000000605 extraction Methods 0.000 description 15
- 238000012986 modification Methods 0.000 description 10
- 230000004048 modification Effects 0.000 description 10
- 238000005452 bending Methods 0.000 description 8
- 230000006866 deterioration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 1
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010742 number 1 fuel oil Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N1/2258—Sampling from a flowing stream of gas in a stack or chimney
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
Abstract
A sampling probe (10) for a gas-measuring device insertable into a conduit (92), the sampling probe (10) for a gas-measuring device comprising: a tubular probe body (11); and a vibration isolation member (13) provided on the outer surface (113) of the probe body (11), wherein the vibration isolation member (13) comprises a 1 st member (1301) and a 2 nd member (1302), the 2 nd member (1302) and the 1 st member (1301) are arranged in series, and the elastic modulus of the 2 nd member (1302) is greater than the elastic modulus of the material constituting the 1 st member (1301).
Description
Technical Field
The present invention relates to a sampling probe for a gas measuring apparatus.
Background
In boilers for burning coal or heavy oil, incinerators for incinerating garbage, and the like, which are provided in thermal power stations and the like,in order to confirm that exhaust gas discharged from these devices has a predetermined component (e.g., Nitrogen Oxide (NO))x) Sulfur Oxide (SO)x) Carbon monoxide (CO) and carbon dioxide (CO)2) ) whether the concentration meets the emission standard, the determination of the concentration is performed. For such measurement, a sampling probe has been conventionally used (for example, patent document 1).
The sampling probe has a tubular main body, and has an extraction port for extracting exhaust gas in the flue at one end of the main body and an exhaust port for discharging the exhaust gas to the detector side at the other end. Such a sampling probe is inserted from the end on the extraction port side into a hole provided in the wall of a flue through which exhaust gas passes. In general, since the concentration of the component of the exhaust gas differs depending on the position in the flue, the position of the hole and the length (insertion length) of the sampling probe inserted from the hole are determined in such a manner that the extraction port is located at a predetermined position in the flue.
Generally, the outer diameter of the sampling probe is about several cm, and the insertion length thereof may be several m to ten m (several hundreds cm to one thousand cm) depending on the size of the flue. If the insertion length is increased in this way, the force that the sampling probe receives from the exhaust gas flowing in the flue becomes large. Further, a karman vortex is formed behind the sampling probe due to collision of the exhaust gas with the sampling probe, and the karman vortex causes vibration of the sampling probe. If the frequency of this vibration coincides with the natural frequency of the tube of the sampling probe, the sampling probe resonates. If a large force is applied or resonance occurs in this manner, the sampling probe may be broken.
Then, the following structure is adopted: a duct having an inner diameter larger than an outer diameter of the sampling probe and a length slightly shorter than an insertion length is provided on an inner surface side of a wall of the flue so as to cover a periphery of a portion of the sampling probe other than the extraction port when the sampling probe is inserted from the hole with the extraction port located at a predetermined position in the flue. Thus, the force from the exhaust gas is substantially received by the guide pipe, and the influence on the sampling probe is suppressed.
However, since the extraction port of the tip of the sampling probe cannot be covered by the guide tube, this portion receives the force of the flow of the exhaust gas. Since the distance from the tip to the fixed portion is long, even a small force generates a large bending moment, and the sampling probe is greatly deflected. The sampling probe vibrates due to a force received by the flow of the exhaust gas, a karman vortex generated behind the flow, or the like. When the vibration approaches the natural frequency of the sampling probe, resonance occurs, and the sampling probe may be greatly deflected.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2014-092383
Disclosure of Invention
Problems to be solved by the invention
In order to solve the above-described problem, it is considered to attach a metal fitting (stopper) to an outer surface of a tubular body of the sampling probe so as to protrude from the outer surface, thereby reducing a gap between the sampling probe and the catheter. According to this configuration, the deflection of the sampling probe when the tip receives the force of the flow of the exhaust gas can be reduced, and the application of a large force to the root of the sampling probe can be avoided.
Since the stopper is attached for the above-described purpose, it is desirable to reduce the gap between the sampling probe and the catheter as much as possible. However, since the duct is provided inside the flue, an installation body of the boiler, the incinerator, and the like, or a maintenance body thereof (hereinafter, the above-described body is referred to as a "user") is generally installed. On the other hand, the sampling probe is manufactured by the analyzer manufacturer to be usable in various scenes. Therefore, it is difficult to attach a stopper to the sampling probe so that the gap between the sampling probe and the catheter becomes zero. Therefore, there is a problem that a bending force is still applied to the sampling probe.
The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a sampling probe for a gas measurement device, which can suppress deterioration when inserted into a duct provided in a flue and used.
Means for solving the problems
The present invention, which has been made in order to solve the above problems, is a sampling probe for a gas measuring apparatus insertable into a catheter, wherein,
the sampling probe for a gas measurement device includes:
a tubular probe body; and
a vibration-proof member provided on an outer surface of the probe body,
the vibration isolation member has a 1 st member and a 2 nd member, the 2 nd member being disposed in series with the 1 st member, the 2 nd member having a modulus of elasticity greater than a modulus of elasticity of a material constituting the 1 st member.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the sampling probe for a gas measurement device of the present invention, since the vibration isolation member includes the 1 st member and the 2 nd member having a larger elastic modulus than the 1 st member, even if the inner diameter of the pipe and the position of the sampling probe with respect to the pipe are slightly different from those assumed by the analyzer manufacturer when the sampling probe is inserted into the pipe provided in the flue and used, the 2 nd member can expand and contract to eliminate the gap between the vibration isolation member and the inner surface of the pipe. This makes it possible to cope with various ducts, and further suppress the influence of bending and vibration due to the flow of exhaust gas, thereby suppressing the deterioration of the sampling probe.
Further, the suppression of the bending of the probe body by the contact of the vibration preventing member with the inner surface of the catheter plays a role corresponding to the increase in the rigidity of the probe body. Thereby, the natural frequency of the probe body is increased. Therefore, even when resonance may occur in the probe body due to the force received from the exhaust gas, the vibration isolation member can be provided in the probe body to prevent the resonance, and thus deterioration of the sampling probe can be suppressed.
Drawings
Fig. 1 is a schematic configuration diagram showing an embodiment of a sampling probe for a gas measurement device according to the present invention.
Fig. 2 is a sectional view showing the structure of the vibration preventing member of the sampling probe according to the present embodiment in detail.
Fig. 3 is a schematic configuration diagram showing a state in which the sampling probe of the present embodiment is attached to a flue.
Fig. 4 is a cross-sectional view showing a state in which the sampling probe of the present embodiment is attached to a flue.
Fig. 5 is a schematic configuration diagram showing a modification of the sampling probe of the present embodiment attached to a flue.
Fig. 6 is a cross-sectional view showing a modification of the vibration preventing member of the sampling probe according to the present embodiment.
Fig. 7 is a cross-sectional view showing a state in which the vibration preventing member of the modification shown in fig. 6 is attached to the flue.
Fig. 8A is a schematic configuration diagram showing a modification of the sampling probe according to the present embodiment.
Fig. 8B is a cross-sectional view of a sampling probe of the modification shown in fig. 8A.
Detailed Description
Hereinafter, embodiments of a sampling probe for a gas measurement device (hereinafter, simply referred to as "sampling probe") according to the present invention will be described with reference to the drawings.
(1) The structure of the sampling probe of the present embodiment
Fig. 1 shows a schematic configuration diagram of a sampling probe 10 according to the present embodiment. The sampling probe 10 includes a probe body 11, a flange 12, and a vibration-proof member 13.
The probe body 11 is a linear tubular member having an extraction port 111 at one end for extracting exhaust gas from the flue, and an exhaust port 112 at the other end for discharging the exhaust gas extracted from the extraction port 111 to a detector of the gas measurement device. For example, stainless steel can be used as the material of the probe body 11, but the present invention is not limited thereto. The outer diameter of the probe body 11 is usually several cm, but the present invention is not limited thereto in this respect. The length of the probe body 11 is appropriately determined in consideration of the distance from the measurement position in the flue, that is, the position where the exhaust gas is extracted to the wall of the flue.
The flange 12 has a hole 122 in an outer peripheral portion of the circular plate 121, and the hole 122 is inserted with a bolt for fixing to a flue-side flange 93 provided in the flue 91 as described later. A hole is provided in the center of the circular plate 121, and the flange 12 is fixed to the outer surface 113 of the probe body 11 at a position near the end of the discharge port 112 in the longitudinal direction by screwing the probe body 11 into the hole.
The vibration-proof member 13 is fixed to the outer surface 113 of the probe body 11 at a position closer to the extraction port 111 than the flange 12. In the example shown in fig. 1, the vibration preventing member 13 is provided at two places with a space in the longitudinal direction of the probe body 11, but may be provided at only one place or at three or more places.
The vibration preventing member 13 has a 1 st member 1301 and a 2 nd member 1302. In the present embodiment, the 1 st member 1301 is provided to partially protrude from the outer surface 113 of the probe body 11, and the 2 nd member 1302 is provided on the side of the 1 st member 1301 opposite to the outer surface 113. The 1 st member 1301 and the 2 nd member 1302 are schematically shown in fig. 1, and specifically, for example, the structure shown in fig. 2 can be adopted.
Fig. 2 shows a state in which the vibration preventing member 13 is attached to the probe body 11 in a cross section perpendicular to the longitudinal direction of the tube of the probe body 11 (a cross section taken along a-a in fig. 1). The vibration isolation member 13 is a member obtained by molding two plate members 1303 into a shape having a semicircular portion 1304 and protruding portions 1305 and 1306, respectively, the semicircular portion 1304 having a shape curved in a semicircular shape (partial circular shape) along the outer surface 113 of the probe body 11 in the a-a cross section, and the protruding portions 1305 and 1306 protruding from both ends of the semicircular shape in a direction perpendicular to the outer surface 113. The vibration-proofing member 13 is attached to the probe body 11 so that the semicircular portions 1304 of the two plate materials 1303 are combined to surround the outer surface 113 once and the protruding portion 1305 of one plate material 1303 and the protruding portion 1306 of the other plate material 1303 are overlapped. Both plate materials 1303 are fixed to each other by bundling the portions where protrusion 1305 and protrusion 1306 are overlapped with each other with wires 1307. In addition, instead of the wire 1307, the two plate members 1303 may be fixed to each other using screws, an adhesive, or the like.
The portion of the two plate materials 1303 where the protrusion 1305 and the protrusion 1306 overlap corresponds to the 1 st member 1301. According to such a structure, two 1 st members 1301 are provided at an interval of 180 ° in the circumferential direction of the outer surface 113 of the probe body 11. To the tip ends of the two 1 st members 1301, 2 nd members 1302 each formed of a leaf spring are attached. The 2 nd member 1302 is fixed to the 1 st member 1301 by sandwiching a part of the plate spring between the protruding portions 1305, 1306 of both the plate members 1303. Plate-like members having a larger elastic modulus (higher flexibility and lower rigidity) than sheet material 1303 can be used for member 1302. Alternatively, since two sheet materials 1303 are overlapped on the 1 st member 1301, the elastic modulus of one sheet material 1303 is larger (higher flexibility and lower rigidity) than that of the 1 st member 1301, and thus the same kind of (same elastic modulus and flexibility) one sheet-shaped member as the sheet material 1303 may be used for the 2 nd member 1302.
(2) Method and operation for Using the sampling Probe of the present embodiment
Next, a method of using the sampling probe 10 according to the present embodiment and an operation thereof will be described with reference to fig. 3 and 4. A duct 92 penetrating a wall 911 of the flue 91 through which the exhaust gas to be measured flows is attached to the wall 911 such that one end is disposed inside the flue 91 and the other end is disposed outside the flue 91. A flue-side flange 93 is attached to an end of the duct 92 located outside the flue 91. A hole is provided in the flue-side flange 93 at a position corresponding to the hole 122 of the flange 12 of the sampling probe 10.
Here, the length of the duct 92 is slightly shorter than the distance between the extraction opening 111 of the sampling probe 10 and the surface of the flange 12 on the flue 91 side. The inner diameter of the conduit 92 may be set within a range that is longer than the distance between the distal ends of the two 1 st members 1301 included in the vibration preventing member 13 and shorter than the distance between the distal ends of the 2 nd members 1302 in a state in which the 2 nd members 1302 attached to the distal ends of the two 1 st members 1301 are extended (unloaded state). The position at which the duct 92 is inserted into the wall 911 of the flue 91 and the length of insertion from the position into the flue 91 are set so that the extraction port 111 is disposed at a predetermined position in the flue 91 in a state where the sampling probe 10 is installed, as described below.
Next, the probe body 11 is inserted into the duct 92 from the end located outside the flue 91, and the flange 12 of the sampling probe 10 is fixed to the flue-side flange 93 by bolts. Thus, the sampling probe 10 is attached to the flue 91 in a state in which the extraction port 111 is disposed at a predetermined position in the flue 91 and the periphery of the probe body 11 except for the vicinity of the extraction port 111 is covered with the duct 92. At this time, since the inner diameter of the guide tube 92 is in a range longer than the distance between the distal ends of the two 1 st members 1301 and shorter than the distance between the distal ends of the two elongated 2 nd members 1302, the 2 nd members 1302 are in contact with the inner surface of the guide tube 92 in a compressed (leaf spring bent) state (fig. 4). At this time, the 2 nd member 1302 is compressed, so that the 2 nd member 1302 can be brought into contact with the inner surface of the catheter 92 even when the inner diameter of the catheter 92 prepared by the user and the attachment position of the sampling probe 10 to the catheter 92 are slightly different from those assumed by the analyzer manufacturer.
After the sampling probe 10 is attached to the flue 91 as described above, the gas measurement device extracts the exhaust gas in the flue 91 from the extraction port 111, introduces the exhaust gas into the detector through the pipe of the probe body 11 and the exhaust port 112, and measures the concentration of a predetermined component contained in the exhaust gas. Since this measurement can be performed by the same method as in the conventional art, detailed description thereof is omitted.
According to the sampling probe 10 of the present embodiment, since the 2 nd member 1302 can be brought into contact with the inner surface of the conduit 92, the gap between the vibration preventing member 13 and the inner surface of the conduit 92 can be eliminated. Thus, even if probe body 11 receives a force due to the flow of exhaust gas in flue 91, bending and vibration of probe body 11 are less likely to occur. Therefore, deterioration and damage of the sampling probe 10 can be suppressed.
Further, the difficulty in bending the probe body 11 due to the contact of the vibration preventing member 13 with the inner surface of the conduit 92 corresponds to an increase in the rigidity of the probe body 11. Thereby, even if vibration occurs in the probe body 11, the natural frequency is increased as compared with the case without the vibration isolation member 13. Therefore, by adding the vibration isolation member 13 to the conventional sampling probe that resonates due to the force received from the exhaust gas, the frequency of vibration deviates from the natural frequency, and thus resonance can be prevented.
Further, although fig. 3 shows an example in which the duct 92 is attached to the wall 911 of the flue 91 so that the longitudinal direction thereof is perpendicular to the wall 911, the duct 92 may be attached to the wall 911 at an inclination such that the end of the duct 92 located inside the flue 91 is lower than the end located outside the flue 91 as shown in fig. 5. This can prevent the liquid adhering to the inside of probe body 11 from components of the exhaust gas in flue 91 from flowing into the detector side through discharge port 112. In this case, it is not necessary to change the structure of the sampling probe 10 from the above-described structure.
(3) Modification of the sampling probe of the present embodiment
The sampling probe of the present invention is not limited to the above-described embodiments, and various modifications can be made. The following shows some modifications, but it goes without saying that the present invention is not limited to the above-described embodiments and the modifications.
For example, in the above-described vibration preventing member 13, the 2 nd member (leaf spring) 1302 is fixed to the 1 st member 1301 by sandwiching a part of the 2 nd member 1302 between the projecting portions 1305, 1306 of the two plate materials 1303, but a part of the 2 nd member 1302 may be fixed to either or both of the projecting portions 1305, 1306 by adhesion, welding, screwing, or the like.
Instead of the vibration-proof member 13, a vibration-proof member 131 shown in fig. 6 may be used. The two plate materials 1313 of the vibration isolation member 131 each have: a semicircular portion 1314 having a shape curved in a semicircular shape along the outer surface 113 of the probe body 11 in a cross section along a-a shown in fig. 1; and projections 1315, 1316 projecting from both ends of the semicircle in a direction perpendicular to the outer surface 113. The vibration prevention member 131 is attached to the probe body 11 so that the semicircular portions 1314 of the two plates 1313 are combined to surround the outer surface 113 once and the protruding portion 1315 of one plate 1313 overlaps the protruding portion 1316 of the other plate 1313. The aspects explained so far are the same as the structure and mounting method of the vibration preventing member 13 described above. However, the anti-vibration member 131 of fig. 6 is different from the anti-vibration member 13 described above in that one protruding portion 1315 of the plate 1313 is longer than the other protruding portion 1316 and protrudes to the side opposite to the outer surface 113. Therefore, when the protrusion 1315 of one plate 1313 is overlapped with the protrusion 1316 of the other plate 1313, the vicinity of the tip of the protrusion 1315 is not in contact with the protrusion 1316. Further, the vibration preventing member 131 is different from the vibration preventing member 13 in that it does not have the 2 nd member separate from the plate 1313. In the vibration isolating member 131, the portion of the protruding portion 1315 of one plate 1313 that overlaps the protruding portion 1316 of the other plate 1313 corresponds to the member 1311 1, and the portion of the protruding portion 1315 that does not overlap the protruding portion 1316 of the other plate 1313 and protrudes to the side opposite to the probe body 11 corresponds to the member 1312 2.
The vibration isolation member 131 of this modification can be provided in the flue 91 (see fig. 7) by the same method as the vibration isolation member 13 of the sampling probe 10 of the above embodiment.
In the sampling probe 10 of the above embodiment, two vibration prevention members 13 are provided at each position in the longitudinal direction of the probe body 11, but only a minimum one of the vibration prevention members 13 may be provided, or three or more may be provided. When only one vibration isolation member 13 is provided, the vibration isolation member 13 is attached to the flue 91 so as to be disposed downstream of the flow of the exhaust gas in the flue 91, and thus, the bending of the probe body 11 due to the force received from the flow of the exhaust gas can be suppressed.
In the case where only one vibration preventing member 13 is provided at each position in the longitudinal direction, it is sufficient if the plate 1303 is bent into a semicircular shape but bent into a full circle and both ends are respectively protruded in a direction perpendicular to the outer surface 113 of the probe body 11. In the case where three vibration-proofing members 13 are provided at each position in the longitudinal direction, three members in which the plate 1303 is bent into a partial circular shape and both ends of the plate are respectively protruded in a direction perpendicular to the outer surface 113 of the probe body 11 may be prepared, and the partial circular shapes of the three plate 1303 may be combined into one circular shape. Here, the angle of the partial circle of each of the plate materials 1303 may be 120 °, or may be different for each of the plate materials 1303. The same applies to the case where four or more vibration preventing members 13 are provided at each position in the longitudinal direction.
Instead of the plate spring, the 2 nd member may be another spring such as a coil spring, and an elastic body other than a spring such as rubber may be used as long as it has heat resistance under the use environment.
In the sampling probe 10 of the above embodiment, the 2 nd member 1302 is provided on the side of the 1 st member 1301 opposite to the outer surface 113 of the probe body 11, but a 2 nd member 1322 may be provided between the 1 st member 1321 and the outer surface 113 of the probe body 11 as in the vibration preventing member 132 shown in fig. 8A and 8B.
[ form ]
Those skilled in the art will appreciate that the above-described exemplary embodiments are specific examples of the following embodiments.
(item 1) A sampling probe for a gas measuring apparatus, which is insertable into a catheter, wherein,
the sampling probe for a gas measurement device includes:
a tubular probe body; and
a vibration-proof member provided on an outer surface of the probe body,
the vibration isolation member has a 1 st member and a 2 nd member, the 2 nd member being disposed in series with the 1 st member, the 2 nd member having a modulus of elasticity greater than a modulus of elasticity of a material constituting the 1 st member.
According to the sampling probe for a gas measurement device described in item 1, since the vibration isolation member includes the 1 st member and the 2 nd member having a larger elastic modulus than the 1 st member, even if the inner diameter of the pipe and the position of the sampling probe with respect to the pipe are slightly different from those assumed by the analyzer manufacturer when the sampling probe is inserted into the pipe provided in the flue and used, the 2 nd member can expand and contract to eliminate the gap between the vibration isolation member and the inner surface of the pipe. This makes it possible to cope with various ducts, and further suppress the influence of bending and vibration due to the flow of exhaust gas, thereby suppressing the deterioration of the sampling probe.
(item 2) A sampling probe for a gas measurement device according to another aspect of the present invention is the sampling probe for a gas measurement device according to item 1,
the 1 st member protrudes from an outer surface of the probe body,
the 2 nd member is provided outside the 1 st member with reference to the probe body.
According to the sampling probe for a gas measurement device described in claim 2, since the 1 st member having a smaller (harder) elastic modulus than the 2 nd member is provided on the probe body side (inside), the vibration isolation member can be held more stably on the outer surface of the probe body.
(item 3) A sampling probe for a gas measurement device according to another aspect of the present invention is the sampling probe for a gas measurement device according to item 2,
the 1 st member is formed by overlapping two plate-like protruding portions protruding from the outer surface of the probe body,
the 2 nd member is a plate spring sandwiched between two of the protruding portions.
According to the sampling probe for a gas measurement device described in claim 3, the vibration isolator can be formed by a simple structure including the protruding portion formed of two plate materials and the plate spring.
(item 4) A sampling probe for a gas measurement device according to another aspect of the present invention is the sampling probe for a gas measurement device according to item 3,
the vibration-proof piece is provided with more than two vibration-proof pieces,
one of the two projecting portions is connected to one of the two projecting portions of the other vibration isolator by a plate material that is bent along the outer surface.
According to the sampling probe for a gas measurement device described in claim 4, since one of the two protrusions constituting the 1 st member and one of the two protrusions constituting the other 1 st member are integrally formed as a single member together with the plate material bent along the outer surface of the probe body, the number of members of the vibration isolation member can be reduced.
(claim 5) A sampling probe for a gas measurement device according to another aspect is the sampling probe for a gas measurement device according to claim 2,
the 1 st member is formed by overlapping two plate-like protruding portions protruding from the outer surface of the probe body,
the 2 nd member is formed by protruding one of the two protruding portions to the side opposite to the outer surface than the other of the two protruding portions.
According to the sampling probe for a gas measurement device described in claim 5, since one of the two plate materials constituting the 1 st member is simultaneously the 2 nd member, the vibration isolation member can be formed with a simple structure.
(item 6) A sampling probe for a gas measurement device according to another aspect of the present invention is the sampling probe for a gas measurement device according to item 5,
the vibration preventing member is provided in two or more.
The one of the two protruding portions is connected to the other of the two protruding portions of the other vibration isolating member by a plate material that is bent along an outer surface of the probe body.
According to the sampling probe for a gas measurement device described in claim 6, since the one of the two protruding portions constituting the 1 st member and the other of the two protruding portions constituting the other 1 st member are integrally formed as a single member together with the plate material that is bent along the outer surface of the probe body, the number of members of the vibration isolation member can be reduced.
Description of the reference numerals
10. A sampling probe; 11. a probe body; 111. an extraction port; 112. an outlet port; 113. an outer surface of the probe body; 12. a flange; 121. a circular plate; 122. a bore of the flange; 13. 131, 132, a vibration-proof member; 1301. 1311, 1321, member 1; 1302. 1312, 1322, member 2; 1303. 1313, a plate material; 1304. 1314, semi-circular portion (partial circular portion); 1305. 1306, 1315, 1316, tab; 1307. a metal wire; 91. a flue; 911. a wall of the flue; 92. a conduit; 93. a flue-side flange.
Claims (6)
1. A sampling probe for a gas measuring apparatus, which is insertable into a catheter, wherein,
the sampling probe for a gas measurement device includes:
a tubular probe body; and
a vibration-proof member provided on an outer surface of the probe body,
the vibration isolation member has a 1 st member and a 2 nd member, the 2 nd member being disposed in series with the 1 st member, the 2 nd member having a modulus of elasticity greater than a modulus of elasticity of a material constituting the 1 st member.
2. The sampling probe for a gas measurement apparatus according to claim 1,
the 1 st member protrudes from an outer surface of the probe body,
the 2 nd member is provided outside the 1 st member with reference to the probe body.
3. The sampling probe for a gas measurement apparatus according to claim 2,
the 1 st member is formed by overlapping two plate-like protruding portions protruding from the outer surface of the probe body,
the 2 nd member is a plate spring sandwiched between two of the protruding portions.
4. The sampling probe for a gas measurement apparatus according to claim 3,
the vibration preventing member is provided with two or more,
one of the two protruding portions is connected to one of the two protruding portions of the other vibration preventing member by a plate material that is bent along the outer surface.
5. The sampling probe for a gas measurement apparatus according to claim 2,
the 1 st member is formed by overlapping two plate-like protruding portions protruding from the outer surface of the probe body,
the 2 nd member is formed by protruding one of the two protruding portions to the side opposite to the outer surface than the other of the two protruding portions.
6. The sampling probe for a gas measurement apparatus according to claim 5,
the vibration preventing member is provided with two or more,
the one of the two protruding portions is connected to the other of the two protruding portions of the other vibration isolating member by a plate material that is bent along an outer surface of the probe body.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019132130 | 2019-07-17 | ||
| JP2019-132130 | 2019-07-17 | ||
| PCT/JP2020/026153 WO2021010186A1 (en) | 2019-07-17 | 2020-07-03 | Sampling probe for gas measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114072655A true CN114072655A (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202080046039.0A Pending CN114072655A (en) | 2019-07-17 | 2020-07-03 | Sampling probe for gas measuring device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7294423B2 (en) |
| CN (1) | CN114072655A (en) |
| WO (1) | WO2021010186A1 (en) |
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| US20080307901A1 (en) * | 2005-12-10 | 2008-12-18 | Jeremy Knight | Gas Probes |
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| JP2014145650A (en) * | 2013-01-29 | 2014-08-14 | Hitachi-Ge Nuclear Energy Ltd | Isokinetic probe |
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| JPS52155086U (en) * | 1976-05-20 | 1977-11-25 | ||
| JPS6110741A (en) * | 1984-06-26 | 1986-01-18 | Horiba Ltd | Sampling pipe |
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2020
- 2020-07-03 CN CN202080046039.0A patent/CN114072655A/en active Pending
- 2020-07-03 WO PCT/JP2020/026153 patent/WO2021010186A1/en active Application Filing
- 2020-07-03 JP JP2021532786A patent/JP7294423B2/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| JP7294423B2 (en) | 2023-06-20 |
| WO2021010186A1 (en) | 2021-01-21 |
| JPWO2021010186A1 (en) | 2021-01-21 |
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