CN211740782U - Flue gas sampling device and flue gas sampling instrument - Google Patents
Flue gas sampling device and flue gas sampling instrument Download PDFInfo
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- CN211740782U CN211740782U CN201922309465.6U CN201922309465U CN211740782U CN 211740782 U CN211740782 U CN 211740782U CN 201922309465 U CN201922309465 U CN 201922309465U CN 211740782 U CN211740782 U CN 211740782U
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Abstract
The utility model provides a flue gas sampling device, include: the smoke sampling pipe assembly comprises a smoke sampling pipe, and an air inlet end is arranged on the smoke sampling pipe; one end of the main pipeline is connected with the smoke sampling pipe, the main pipeline is communicated with the smoke sampling pipe, and a switching valve is arranged on the main pipeline and controls the opening and closing state of the main pipeline; the sampling pump body is connected with the other end of the main pipeline and communicated with the main pipeline; the flow rate adjusting assembly, flow rate adjusting assembly one end is connected with the flue gas sampling pipe, and flow rate adjusting assembly is linked together with the flue gas sampling pipe, and the flow rate adjusting assembly other end still is connected with the sampling pump body, and flow rate adjusting assembly is linked together with the sampling pump body. The utility model provides a flue gas sampling device has improved the stability of flow when flue gas sampling device low flow flue gas sampling, and then improves the accuracy of analysis sampling flue gas composition.
Description
Technical Field
The utility model relates to a flue gas analysis instrument technical field, in particular to flue gas sampling device and flue gas sampling instrument.
Background
In order to analyze the conditions of various harmful gases discharged from flues, exhaust pipes and the like of industrial and mining enterprises, a flue gas sampling device is generally adopted to sample the discharged flue gas.
The existing flue gas sampling device is characterized in that a flue gas sampling pipe is communicated with a sampling pump body through a gas circuit, and the sampling of flue gas is realized through the effect of the sampling pump body.
Although the range of the flue gas flow of the existing flue gas sampling device is adjustable, when low-flow flue gas sampling is set, because the flue gas flow is in direct proportion to the flue gas flow velocity and the cross-sectional area of a gas path, when the cross-sectional area of the gas path is not changed, the flue gas flow velocity is low, the rotating speed of a sampling pump body is not easy to control, and the flow stability during low-flow sampling is difficult to guarantee, so that a flue gas flow value actually measured and the set flue gas flow value generate a large error, and the accuracy of analyzing and sampling flue gas components is influenced.
SUMMERY OF THE UTILITY MODEL
Poor technical problem of flow stability when solving among the prior art flue gas sampling device low discharge sampling, the utility model provides a flue gas sampling device can change the cross-sectional area of gas circuit according to flue gas flow size to the velocity of flow size of flue gas air current has been adjusted, makes the rotational speed of the control sampling pump body of changing when low discharge flue gas sampling, the stability of flow when having improved flue gas sampling device low discharge flue gas sampling, and then improves the accuracy of analysis sampling flue gas composition.
The utility model provides a flue gas sampling device, include:
a flue gas sampling pipe assembly, the flue gas sampling pipe assembly comprising;
the smoke sampling pipe is provided with an air inlet end;
one end of the main pipeline is connected with the smoke sampling pipe, the main pipeline is communicated with the smoke sampling pipe, and a switching valve is arranged on the main pipeline and controls the opening and closing state of the main pipeline;
the sampling pump body is connected with the other end of the main pipeline and communicated with the main pipeline;
flow rate adjusting part, flow rate adjusting part one end with the flue gas sampling pipe is connected, flow rate adjusting part with the flue gas sampling pipe is linked together, the flow rate adjusting part other end still with the sampling pump body is connected, flow rate adjusting part with the sampling pump body is linked together.
Further, the flow rate adjustment assembly includes:
one end of the first pipeline is connected with the smoke sampling pipe, and the first pipeline is communicated with the smoke sampling pipe;
one end of the first connecting piece is connected with the other end of the first pipeline, a first channel is formed inside the first connecting piece and communicated with the first pipeline, and a groove is formed in the first connecting piece;
one end of the second pipeline is connected with the sampling pump body, and the second pipeline is communicated with the sampling pump body;
one end of the second connecting piece is connected with the other end of the second pipeline, a second channel is formed inside the second connecting piece, the second channel is communicated with the second pipeline, and the other end of the second connecting piece is connected with the other end of the first connecting piece;
the adjusting piece is located in the groove, a through hole is formed in the adjusting piece, the cross section area of the through hole is smaller than that of the first channel, the cross section area of the through hole is smaller than that of the second channel, and the first pipeline, the first channel, the through hole, the second channel and the second pipeline are communicated.
Further, the flow rate adjustment assembly further comprises:
the sealing element is positioned in the groove, and the first connecting piece, the second connecting piece and the adjusting piece are connected in a sealing mode through the sealing element.
Further, the flow rate adjustment assembly includes:
the regulating tube, regulating tube one end with the flue gas sampling pipe is connected, the regulating tube with the flue gas sampling pipe is linked together, the regulating tube other end with the sampling pump body is connected, the regulating tube with the sampling pump body is linked together, the diameter of regulating tube is less than the diameter of main line.
Further, still include: a gas-containing body;
be provided with gas capacity main part air inlet and gas capacity main part gas outlet in the gas capacity main part, gas capacity main part air inlet with flue gas sampling pipe is linked together, gas capacity main part gas outlet with the main pipeline is linked together, gas capacity main part gas outlet still with velocity of flow adjusting part is linked together.
Further, the flue gas sampling pipe assembly further comprises:
the flow meter is arranged on the flue gas sampling pipe;
a filter element disposed at the air inlet end.
The utility model also provides a flue gas sampling instrument contains the aforesaid flue gas sampling device.
Further, the smoke sampling device comprises two smoke sampling devices with the same structure.
The utility model discloses a technological effect or advantage:
(1) the utility model provides a flue gas sampling device, which is provided with a main pipeline and a flow velocity adjusting component, wherein a switching valve is arranged on the main pipeline, the main pipeline and the flow velocity adjusting component are respectively communicated with a flue gas sampling pipe and a sampling pump body, and the switching valve controls the open-close state of the main pipeline; when low flow flue gas sampling, the diverter valve is in the closure state, blocks the main pipeline, and under the sampling pump effect, the flue gas air current passes through velocity of flow adjusting part, has changed the cross-sectional area of gas circuit to the velocity of flow size of flue gas air current has been adjusted, makes the rotational speed of the easier control sampling pump body during low flow flue gas sampling, the stability of flow when having improved flue gas sampling device low flow flue gas sampling, and then improves the accuracy of analysis sampling flue gas composition.
(2) The utility model provides a double-circuit flue gas sampling device is provided with the sealing member, and the sealing member is located the recess of first connecting piece, and first connecting piece, second connecting piece and regulating part pass through sealing member sealing connection, at low flow flue gas sampling in-process for flue gas air current in the first pipeline only gets into the second pipeline through first connecting piece, regulating part and second connecting piece, guarantees the gas tightness of flow velocity adjusting subassembly in the whole flue gas sampling process.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention.
Fig. 1 is a schematic structural diagram of a flue gas sampling device according to a first embodiment of the present invention;
FIG. 2 is a left side view of FIG. 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 1;
fig. 4 is a schematic structural diagram of a flue gas sampling apparatus according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a smoke sampling device provided in the second embodiment of the present invention;
fig. 6 is a schematic structural diagram of a smoke sampling apparatus provided in the second embodiment of the present invention.
Description of the drawings: 1. a flue gas sampling pipe assembly; 11. a flue gas sampling pipe; 12. an air inlet end; 13. a filter member; 14. a flow meter; 2. a main pipeline; 21. a switching valve; 3. sampling a pump body; 31. sampling a pump body air inlet; 32. sampling an air outlet of the pump body; 4. a flow rate regulating assembly; 41. a first pipeline; 42. a first connecting member; 421. a first channel; 422. a groove; 43. a second pipeline; 44. a second connecting member; 441. a second channel; 45. an adjustment member; 451. a through hole; 46. a seal member; 47. an adjusting tube; 5. a gas-containing body; 51. a gas-capacitance body gas inlet; 52. and an air outlet of the air-capacitor main body.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and the detailed description. Although embodiments of the present invention have been disclosed in the accompanying drawings, it should be understood that the invention can be embodied in any form and should not be limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "inside", "outside", "upper", "lower", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "first," "second," and the like, are used herein to describe various elements, components, regions, layers and/or sections, but are used only to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Terms such as "first," "second," and the like, as well as other numerical terms, are not used herein to imply a sequence or order unless clearly indicated by the context.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Poor technical problem of flow stability when solving among the prior art flue gas sampling device low discharge sampling, the utility model provides a flue gas sampling device can change the cross-sectional area of gas circuit according to flue gas flow size to the velocity of flow size of flue gas air current has been adjusted, makes the rotational speed of the control sampling pump body of changing when low discharge flue gas sampling, the stability of flow when having improved flue gas sampling device low discharge flue gas sampling, and then improves the accuracy of analysis sampling flue gas composition.
The technical solution of the present invention will be described in detail below with reference to the following specific embodiments and accompanying drawings.
Example one
The embodiment one relates to a flue gas sampling device, including:
the flue gas sampling pipe assembly 1 comprises a flue gas sampling pipe assembly 1;
the device comprises a flue gas sampling pipe 11, wherein an air inlet end 12 is arranged on the flue gas sampling pipe 11;
one end of the main pipeline 2 is connected with the flue gas sampling pipe 11, the main pipeline 2 is communicated with the flue gas sampling pipe 11, a switching valve 21 is arranged on the main pipeline 2, and the switching valve 21 controls the opening and closing state of the main pipeline 2;
the sampling pump body 3 is connected with the other end of the main pipeline 2, and the sampling pump body 3 is communicated with the main pipeline 2;
flow rate adjusting part 4, flow rate adjusting part 4 one end with flue gas sampling pipe 11 is connected, flow rate adjusting part 4 with flue gas sampling pipe 11 is linked together, the 4 other ends of flow rate adjusting part still with the sampling pump body 3 is connected, flow rate adjusting part 4 with the sampling pump body 3 is linked together.
The flue gas sampling device provided by the first embodiment is provided with a main pipeline 2 and a flow rate adjusting component 4, wherein a switching valve 21 is arranged on the main pipeline 2, the main pipeline 2 and the flow rate adjusting component 4 are respectively communicated with a flue gas sampling pipe 11 and a sampling pump body 3, and the switching valve 21 controls the opening and closing state of the main pipeline 2; when low flow flue gas sampling, diverter valve 21 is in the closure state, blocks main pipeline 2, and under the effect of the sampling pump body 3, the flue gas air current passes through velocity of flow adjusting part 4, has changed the cross-sectional area of gas circuit to the velocity of flow size of flue gas air current has been adjusted, makes the rotational speed of the sampling pump body 3 of changing the control during low flow flue gas sampling, the stability of flow when having improved the sampling of flue gas sampling device low flow flue gas, and then the accuracy of the analysis sampling flue gas composition is improved.
Specifically, referring to fig. 1, a smoke sampling device provided in a first embodiment includes: flue gas sampling pipe subassembly 1, main line 2, the sampling pump body 3, velocity of flow adjusting part 4 and gas capacity main part 5, flue gas sampling pipe subassembly 1 is linked together with gas capacity main part 5, and gas capacity main part 5 is linked together with main line 2, and gas capacity main part 5 still is linked together with velocity of flow adjusting part 4, and velocity of flow adjusting part 4 still is linked together with the sampling pump body 3, and the sampling pump body 3 still is linked together with main line 2.
The flue gas sampling pipe assembly 1 is used for sampling flue gas in a flue. Referring to fig. 1 and 2, specifically, the flue gas sampling pipe assembly 1 includes a flue gas sampling pipe 11, an air inlet 12 is provided on the flue gas sampling pipe 11, a flow meter 14 is provided on the flue gas sampling pipe 11, the flow meter 14 is used for measuring the flow value of the flue gas in real time, and for improving the accuracy of analyzing flue gas components, a filtering member 13 is provided at the air inlet 12 to filter out impurities in the sampled flue gas.
The main pipeline 2 is used for controlling the flow direction of the sampling flue gas flow. Continuing to refer to fig. 1 and fig. 2, specifically, main line 2 one end is connected with flue gas sampling pipe 11, main line 2 is linked together with flue gas sampling pipe 11, the main line 2 other end is connected with the sampling pump body 3, main line 2 is linked together with the sampling pump body 3, be provided with diverter valve 21 on the main line 2, diverter valve 21 is used for controlling the switching state of main line 2, switching through main line 2, and then the flow direction of control sampling flue gas flow, when main line 2 blocks, the flue gas air current that flows out from flue gas sampling pipe 11 only passes through velocity of flow adjusting part 4, when main line 2 communicates, the flue gas air current that flows out from flue gas sampling pipe 11 passes through main line 2 and velocity of flow adjusting part 4 simultaneously. More specifically, the switching valve 21 may be an on-off valve, a switching valve, and a ball valve.
The sampling pump body 3 is used for providing sampling power. With continuing reference to fig. 1 and 2, specifically, the sampling pump body 3 is provided with a sampling pump body air inlet 31 and a sampling pump body air outlet 32, the sampling pump body air inlet 31 is communicated with the main pipeline 2, and the sampling pump body air inlet 31 is further communicated with the flow rate adjusting assembly 4. More specifically, the air inlet 31 of the sampling pump body is connected with an air inlet pipe, the material of the air inlet pipe can be silicon rubber material, a three-way pipe is arranged on the air inlet pipe, and the sampling pump body 3 is communicated with the main pipeline 2 and the flow rate adjusting assembly 4 through the three-way pipe.
The flow rate adjusting assembly 4 is used to change the cross-sectional area of the gas path. Referring to fig. 1 to 3, in particular, the flow rate adjusting assembly 2 includes a first pipeline 41, a first connecting member 42, a second pipeline 43, a second connecting member 44, and an adjusting member 45; one end of the first pipeline 41 is connected with the flue gas sampling pipe 11, and the first pipeline 41 is communicated with the flue gas sampling pipe 11; the other end of the first pipeline 41 is connected with one end of a first connecting piece 42, a first channel 421 is formed inside the first connecting piece 42, the first channel 421 is communicated with the first pipeline 41, a groove 422 is formed in the first connecting piece 42, the other end of the first connecting piece 42 is connected with one end of a second connecting piece 44 and can be in threaded connection, the other end of the second connecting piece 44 is connected with one end of a second pipeline 43, a second channel 441 is formed inside the second connecting piece 44, the second channel 441 is communicated with the second pipeline 43, the other end of the second pipeline 43 is connected with the sampling pump body air inlet 31, the second pipeline 43 is communicated with the sampling pump body 3, the adjusting piece 45 is positioned in the groove 422, a through hole 451 is formed in the adjusting piece 45, the cross-sectional area of the through hole 451 is smaller than that of the first channel 421, the cross-sectional area of the through hole 451 is smaller than that of the, The first passage 421, the through hole 451, the second passage 441 and the second pipe 43 are connected, and more specifically, the adjusting member 45 may be made of epoxy resin material and have a disk shape, and preferably, the through hole has a circular hole shape with a circular cross-sectional area and a diameter of 2 mm.
In order to improve the air tightness of the flow rate adjusting assembly 4 in the flue gas sampling process, referring to fig. 3, the flow rate adjusting assembly 4 further includes: the sealing element 46, the sealing element 46 is located in the groove 422, the first connecting element 42, the second connecting element 44 and the adjusting element 45 are connected in a sealing manner through the sealing element 46, the material of the sealing element 46 can be silicon rubber, the sealing element 46 is in a circular ring shape, and the cross-sectional area of the sealing member 46 is larger than that of the through-hole 451, the number of the sealing members 46 may be one or more, preferably, the number of the sealing members 46 is 2 in the present embodiment, both the sealing members 46 are located in the groove 422, one of the sealing members 46 has an end surface contacting the first connecting member 42 and the other end surface contacting the adjusting member 45, the other sealing member 46 has an end surface contacting the second connecting member 44 and the other end surface contacting the adjusting member 45, in the low-flow flue gas sampling process, the flue gas airflow in the first pipeline only enters the second pipeline through the first connecting piece, the adjusting piece and the second connecting piece, and the air tightness of the flow velocity adjusting assembly in the whole flue gas sampling process is ensured. In order to facilitate the smooth flow of the sampled flue gas through the through hole 451, preferably, the axial center lines of the first pipe 41, the second pipe 43, the adjusting member 45, the first connecting member 42, the second connecting member 44 and the sealing member 46 are located on the same straight line.
The gas-containing body 5 serves to buffer the flow rate of the sampled flue gas stream. Referring to fig. 1 and 2, in particular, the gas container body 5 is provided with a gas container body gas inlet 51 and a gas container body gas outlet 52, the gas container body gas inlet 11 is communicated with the flue gas sampling pipe, and the gas container body gas outlet 52 is communicated with the main pipeline 2. The gas-containing body gas outlet 52 is also in communication with the first conduit 41. More specifically, the air outlet 12 of the air volume main body is connected with an air outlet pipe, the material of the air outlet pipe can be silicon rubber, a three-way pipe fitting is arranged on the air outlet pipe, and the air volume main body 5 is communicated with the first pipeline 41 and the main pipeline 2 through the three-way pipe fitting. Be provided with buffering air chamber (not shown in the figure) in the gas capacity main part 5, during the flue gas sampling, the sampling flue gas gets into buffering air chamber buffering flue gas air current through gas capacity main part 5 air inlet 51, and rethread gas capacity main part gas outlet 52 flows in first pipeline 41 and main line 2 for flue gas air current is steady that the flow is become, and the pressure oscillation is less, is favorable to improving the accuracy and the reliability of analysis sampling flue gas.
The embodiment I provides a flue gas sampling device, and the specific working process is as follows: when the flow of the sampled flue gas is greater than the low-flow threshold value of the flue gas sampling, the switching valve 21 is in an open state and is communicated with the main pipeline 2, the flue gas flow simultaneously passes through the main pipeline 2 and the flow velocity adjusting component 4 under the action of the sampling pump body 3, when the flow of the sampled flue gas is less than or equal to the low-flow threshold value of the flue gas sampling, the switching valve 21 is in a closed state and blocks the main pipeline 2, and under the action of the sampling pump body 3, the flue gas flow only passes through the flow velocity adjusting component 4, the cross-sectional area of a gas path is changed, and therefore.
Referring to fig. 4, in the first embodiment, a flue gas sampling apparatus is further provided, which includes the above flue gas sampling device, and further includes two types of the above flue gas sampling devices with the same structure.
Example two
Referring to fig. 5, the second embodiment is different from the first embodiment in the construction of the flow rate adjusting unit 2, and the rest of the second embodiment is the same as the first embodiment. The flow rate adjusting assembly 4 provided in the second embodiment includes an adjusting pipe 47, one end of the adjusting pipe 47 is connected to the smoke sampling pipe 11, the adjusting pipe 47 is communicated with the smoke sampling pipe 11, the other end of the adjusting pipe 47 is connected to the air inlet 31 of the sampling pump body, the adjusting pipe 47 is communicated with the sampling pump body 3, and the diameter of the adjusting pipe 47 is smaller than that of the main pipeline 2. More specifically, one end of the adjusting pipe 47 is connected with the gas outlet 52 of the gas container body, the adjusting pipe 47 is communicated with the gas container body 5 through a tee pipe, the other end of the adjusting pipe 47 is connected with the gas inlet 31 of the sampling pump body, the adjusting pipe 47 is communicated with the sampling pump body 3 through a tee pipe, when the flow rate of the sampled smoke is greater than the smoke sampling low flow threshold value, the switching valve 21 is in an open state and is communicated with the main pipeline 2, when the flow rate of the sampled smoke is less than or equal to the smoke sampling low flow threshold value, the main pipeline 2 is blocked when the switching valve 21 is in a closed state, under the action of the sampling pump body 3, the smoke flow passes through the adjusting pipe 47, the cross-sectional area of the gas path is changed, thereby the flow rate of the smoke flow is adjusted, the rotating speed of the sampling pump body 3 is, and further improve the accuracy of analyzing and sampling smoke components.
Referring to fig. 6, in the second embodiment, a flue gas sampling apparatus is further provided, which includes the above flue gas sampling device, and further includes two types of the above flue gas sampling devices with the same structure.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. A flue gas sampling device, comprising:
flue gas sampling pipe subassembly, flue gas sampling pipe subassembly includes:
the smoke sampling pipe is provided with an air inlet end;
one end of the main pipeline is connected with the smoke sampling pipe, the main pipeline is communicated with the smoke sampling pipe, and a switching valve is arranged on the main pipeline and controls the opening and closing state of the main pipeline;
the sampling pump body is connected with the other end of the main pipeline and communicated with the main pipeline;
flow rate adjusting part, flow rate adjusting part one end with the flue gas sampling pipe is connected, flow rate adjusting part with the flue gas sampling pipe is linked together, the flow rate adjusting part other end still with the sampling pump body is connected, flow rate adjusting part with the sampling pump body is linked together.
2. The smoke sampling device of claim 1, wherein said flow rate adjustment assembly comprises:
one end of the first pipeline is connected with the smoke sampling pipe, and the first pipeline is communicated with the smoke sampling pipe;
one end of the first connecting piece is connected with the other end of the first pipeline, a first channel is formed inside the first connecting piece and communicated with the first pipeline, and a groove is formed in the first connecting piece;
one end of the second pipeline is connected with the sampling pump body, and the second pipeline is communicated with the sampling pump body;
one end of the second connecting piece is connected with the other end of the second pipeline, a second channel is formed inside the second connecting piece, the second channel is communicated with the second pipeline, and the other end of the second connecting piece is connected with the other end of the first connecting piece;
the adjusting piece is located in the groove, a through hole is formed in the adjusting piece, the cross section area of the through hole is smaller than that of the first channel, the cross section area of the through hole is smaller than that of the second channel, and the first pipeline, the first channel, the through hole, the second channel and the second pipeline are communicated.
3. The smoke sampling device of claim 2, wherein said flow rate adjustment assembly further comprises:
the sealing element is positioned in the groove, and the first connecting piece, the second connecting piece and the adjusting piece are connected in a sealing mode through the sealing element.
4. The smoke sampling device of claim 1, wherein said flow rate adjustment assembly comprises:
the regulating tube, regulating tube one end with the flue gas sampling pipe is connected, the regulating tube with the flue gas sampling pipe is linked together, the regulating tube other end with the sampling pump body is connected, the regulating tube with the sampling pump body is linked together, the diameter of regulating tube is less than the diameter of main line.
5. The flue gas sampling device of any one of claims 1 to 4, further comprising: a gas-containing body;
be provided with gas capacity main part air inlet and gas capacity main part gas outlet in the gas capacity main part, gas capacity main part air inlet with flue gas sampling pipe is linked together, gas capacity main part gas outlet with the main pipeline is linked together, gas capacity main part gas outlet still with velocity of flow adjusting part is linked together.
6. The flue gas sampling device of any one of claims 1 to 4, wherein the flue gas sampling tube assembly further comprises:
the flow meter is arranged on the flue gas sampling pipe;
a filter element disposed at the air inlet end.
7. A flue gas sampling instrument, characterized by comprising the flue gas sampling device of any one of claims 1 to 6.
8. The smoke sampling apparatus of claim 7, comprising two smoke sampling devices of identical construction.
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| CN201922309465.6U CN211740782U (en) | 2019-12-20 | 2019-12-20 | Flue gas sampling device and flue gas sampling instrument |
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| CN201922309465.6U CN211740782U (en) | 2019-12-20 | 2019-12-20 | Flue gas sampling device and flue gas sampling instrument |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509536A (en) * | 2022-01-20 | 2022-05-17 | 苏州中正工程检测有限公司 | Indoor environment detection equipment for simulating building environment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114509536A (en) * | 2022-01-20 | 2022-05-17 | 苏州中正工程检测有限公司 | Indoor environment detection equipment for simulating building environment |
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