CN213121317U - Multipoint full-section flue gas flow sampling device - Google Patents
Multipoint full-section flue gas flow sampling device Download PDFInfo
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- CN213121317U CN213121317U CN202022145568.6U CN202022145568U CN213121317U CN 213121317 U CN213121317 U CN 213121317U CN 202022145568 U CN202022145568 U CN 202022145568U CN 213121317 U CN213121317 U CN 213121317U
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Abstract
The utility model relates to a flue gas flow detects technical field, discloses a multiple spot full-section flue gas flow sampling device, including square flue and with a plurality of supporting beam of the inside wall fixed connection of square flue, be provided with a plurality of malleation sampling barrels of group on the same cross section of the inboard of square flue, and one side that is close to the malleation sampling barrel on the same cross section of the inboard of square flue all is provided with the negative pressure sampling barrel, every the outside that the top of negative pressure sampling barrel is located square flue all is provided with a negative pressure side draft tube. The utility model discloses a turn, dead angle and the end department of pipeline all are provided with can dismantle union or the end cap that has the sealing washer to the pipeline is demolishd to the segmentable and is clear stifled, and need not take the cutting pipeline to clear up, and then can not damage the management, and the quick installation of being convenient for after clearing up, and the detachable part all adopts the plane to seal, installs the sealing washer additional, and the screw thread compresses tightly, can effectually guarantee to draw the leakproofness of pressing the pipeline.
Description
Technical Field
The utility model relates to a flue gas flow detects technical field, specifically is a multiple spot full-section flue gas flow sampling device.
Background
The existing flow measurement system for the smoke discharged by a thermal power plant is installed on a large-scale pipeline and is limited by measurement technical requirements and installation conditions, and a plurality of flow measurement systems adopt a multipoint full-section differential pressure type sampling system. The flow sampling system is divided into two parts, one part is a differential pressure taking element arranged in a flue, and the other part is a pressure guide pipeline arranged outside a pipeline. The working principle of the differential pressure sampling device is that after fluid flows through the device, a differential pressure signal which has a certain relation with the fluid flow is generated, and the differential pressure is taken out through a pressure leading pipeline and converted into a standard electric signal through a differential pressure transmitting unit for remote transmission for monitoring personnel. The differential pressure sampling device is characterized in that a plurality of groups are uniformly distributed on one cross section of the inner part of the flue, the measured differential pressure of each group is led out to the outside of the flue through a positive pressure sampling pipeline and a negative pressure sampling pipeline, and the positive pressure sampling pipe and the negative pressure sampling pipe of each group are respectively collected to a positive pressure collecting cylinder and a negative pressure collecting cylinder and then are sent to a differential pressure transmitter from the collecting cylinders.
Differential pressure sampling system is in the use, there is the problem of jam and corruption always, its reason is, there is the leakage point when the outside sample pipeline of flue, the flue gas of flue can leak along the sample pipeline, because the flue is inside to be high temperature flue gas (more than 120 ℃), contain corrosive substance (like sulfur dioxide) in the flue gas, vapor and dust granule, the flue gas that leaks has arrived the outside sampling tube of flue after, the temperature reduces gradually, vapor dewfall will appear this moment, sulfur dioxide and water mix formation sulfurous acid, cause the corruption to metal sample pipeline. Meanwhile, dust particles in the flue gas and sulfurous acid form hard crystals which are gradually attached to the inner wall of the sampling tube, the sampling tube is completely blocked, the blockage of the pipeline is difficult to clear, the pipe wall is corroded and penetrated due to the corrosion of the pipeline, and thus the measured differential pressure signal cannot truly reflect the flow of the flue gas in the flue.
At present, the traditional measuring pipeline is complex in arrangement, has more turns, has no detachable part, is corroded and blocked, is difficult to maintain, is difficult to completely eliminate in system operation, generally adopts a whole-section pipeline cutting and replacing mode to process after the system is stopped, recovers after blockage clearing, greatly influences the pipeline blockage again due to the system tightness, and easily leaves sand holes after cutting and welding, so that the sealing performance is poor. Accordingly, one skilled in the art provides a multi-point full-section flue gas flow sampling device to solve the above-mentioned problems of the background art.
Disclosure of Invention
An object of the utility model is to provide a multiple spot full cross-section flue gas flow sampling device to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
a multipoint full-section flue gas flow sampling device comprises a square flue and a plurality of supporting beams fixedly connected with the inner side wall of the square flue, wherein a plurality of groups of positive pressure sampling cylinders are arranged on the same cross section of the inner side of the square flue, negative pressure sampling cylinders are arranged on one sides, close to the positive pressure sampling cylinders, of the same cross section of the inner side of the square flue, the top end of each positive pressure sampling cylinder is positioned on the outer side of the square flue and is provided with a positive pressure side pressure pipe, the top ends of a plurality of positive pressure side pressure pipes are commonly provided with a positive pressure side collecting cylinder, the top end of each negative pressure sampling cylinder is positioned on the outer side of the flue and is provided with a negative pressure side pressure pipe, and the top ends of a plurality of negative pressure side pressure pipes are commonly provided with a negative;
the positive pressure side collecting cylinder comprises a collecting cylinder body, a plurality of groups of threaded joint pipes are arranged at the bottom end of the outer side of the collecting cylinder body, an external thread plug is meshed and connected with one end of the collecting cylinder body, and a plug sealing ring is sleeved at the joint of the external thread plug and the collecting cylinder body;
the pressure pipe is pressed to malleation side includes the pressure pipe body, the upper end fixedly connected with of pressure pipe body sets up the spacing ring of annular groove, and the upper end sliding connection in the outside of pressure pipe body has the internal thread union, the embedded joint sealing washer that is provided with of annular groove of spacing ring.
As a further aspect of the present invention: turning and dead angle department that malleation sampling tube, malleation side pressure tube, negative pressure side pressure tube and negative pressure sampling tube all are provided with can dismantle the union that has the sealing washer, and can dismantle the union that has the sealing washer and the same with the structure that connects the sealing washer of internal thread union, malleation sampling tube, malleation side collect a section of thick bamboo, negative pressure side collect the end department that a section of thick bamboo and negative pressure sampling tube all are provided with can dismantle the end cap that has the sealing washer. And the detachable plug with the sealing ring has the same structure as the plug with the external thread and the plug sealing ring.
As a further aspect of the present invention: every one side of malleation sampling section of thick bamboo all corresponds a negative pressure sampling section of thick bamboo, malleation sampling section of thick bamboo and the equal fixed mounting of negative pressure sampling section of thick bamboo are on a supporting beam.
As a further aspect of the present invention: one side that the external screw thread end cap was kept away from to the one end that a section of thick bamboo was collected to malleation side is provided with the malleation outlet pipe, the one end that a section of thick bamboo was collected to the negative pressure side is provided with the negative pressure outlet pipe, the one end of malleation outlet pipe and negative pressure outlet pipe is provided with differential pressure transmitter jointly.
As a further aspect of the present invention: the joint sealing ring is positioned between the threaded joint pipe and the limiting ring, the lower end of the threaded joint pipe is positioned on the inner side of the internal thread union, and the pressure leading pipe body is fixedly connected with the threaded joint pipe through the internal thread union.
As a further aspect of the present invention: the positive pressure side collecting cylinder and the negative pressure side collecting cylinder are both seamless stainless steel tubes with phi 60x3, and the positive pressure sampling cylinder and the negative pressure sampling cylinder are both seamless stainless steel tubes with phi 42x 3.
Compared with the prior art, the beneficial effects of the utility model are that:
a section of thick bamboo is collected to the malleation side, a section of thick bamboo is collected to the negative pressure side, the malleation sampling section, malleation side pressure tube, the turn of negative pressure side pressure tube and negative pressure sampling section, dead angle and end department all are provided with can dismantle union or the end cap that has the sealing washer, thereby the pipeline is demolishd to the segmentable and is clear stifled, and need not take the cutting pipeline to clear up stifled, and then can not damage the management, and be convenient for quick installation after the clearance, removable part all adopts plane seal, install the sealing washer additional, the screw thread compresses tightly, can effectual assurance pressure tube way the leakproofness, the measuring accuracy has been improved.
Drawings
FIG. 1 is a schematic structural diagram of a multi-point full-section flue gas flow sampling device;
FIG. 2 is a schematic top view of a multi-point full cross-section flue gas flow sampling apparatus;
FIG. 3 is a partially exploded view of a positive pressure sampling barrel, a positive pressure side pressure guiding tube and a positive pressure side collecting barrel in a multi-point full-section flue gas flow sampling device;
FIG. 4 is a partially exploded view of a positive pressure side collection barrel of a multi-point full cross-section flue gas flow sampling apparatus;
fig. 5 is a partial exploded view of a positive pressure side draught tube in a multi-point full-section flue gas flow sampling device.
In the figure: 1. a square flue; 2. a support beam; 3. a positive pressure sampling cylinder; 4. a pressure pipe is led out from the positive pressure side; 41. a pressure leading pipe body; 42. an internal thread movable joint; 43. a limiting ring; 44. a joint seal ring; 5. a positive pressure side collection cylinder; 51. a collection cylinder body; 52. a threaded joint pipe; 53. an external thread plug; 54. A plug sealing ring; 6. a negative pressure side pressure leading pipe; 7. a negative pressure side collection cylinder; 8. a negative pressure sampling cylinder; 9. a positive pressure outlet pipe; 10. a negative pressure outlet pipe; 11. and a differential pressure transmitter.
Detailed Description
Referring to fig. 1 to 5, in an embodiment of the present invention, a multipoint full-section flue gas flow sampling device includes a square flue 1 and a plurality of supporting beams 2 fixedly connected to an inner side wall of the square flue 1, a plurality of groups of positive pressure sampling cylinders 3 are disposed on a same cross section of an inner side of the square flue 1, negative pressure sampling cylinders 8 are disposed on one sides of the same cross section of the inner side of the square flue 1, a positive pressure side pressure pipe 4 is disposed on an outer side of the square flue 1 at a top end of each positive pressure sampling cylinder 3, a positive pressure side collecting cylinder 5 is disposed at a top end of each positive pressure side pressure pipe 4, a negative pressure side pressure pipe 6 is disposed on an outer side of the square flue 1 at a top end of each negative pressure sampling cylinder 8, and a negative pressure side collecting cylinder 7 is disposed at a top end of each negative pressure side pressure pipe 6;
the positive pressure side collecting cylinder 5 comprises a collecting cylinder body 51, a plurality of groups of threaded joint pipes 52 are arranged at the bottom end of the outer side of the collecting cylinder body 51, an external thread plug 53 is meshed and connected with one end of the collecting cylinder body 51, and a plug sealing ring 54 is sleeved at the joint of the external thread plug 53 and the collecting cylinder body 51;
the pressure pipe 4 on the positive pressure side comprises a pressure pipe body 41, a limiting ring 43 with an annular groove is fixedly connected to the upper end of the pressure pipe body 41, an internal thread union 42 is slidably connected to the upper end of the outer side of the pressure pipe body 41, and a joint sealing ring 44 is embedded into the annular groove of the limiting ring 43.
In fig. 2: the turning and dead angle positions of the positive pressure sampling barrel 3, the positive pressure side pressure guiding pipe 4, the negative pressure side pressure guiding pipe 6 and the negative pressure sampling barrel 8 are respectively provided with a detachable union with a sealing ring, the detachable union with the sealing ring is the same as the structures of the internal thread union 42 and the joint sealing ring 44, and the end heads of the positive pressure sampling barrel 3, the positive pressure side collecting barrel 5, the negative pressure side collecting barrel 7 and the negative pressure sampling barrel 8 are respectively provided with a detachable plug with a sealing ring. The plug with the detachable sealing ring has the same structure as the plug with the external thread 53 and the plug sealing ring 54.
In fig. 1: one side of every malleation sampling section of thick bamboo 3 all corresponds a negative pressure sampling section of thick bamboo 8, and malleation sampling section of thick bamboo 3 and the equal fixed mounting of negative pressure sampling section of thick bamboo 8 are on a supporting beam 2 to can make malleation sampling section of thick bamboo 3 and corresponding negative pressure sampling section of thick bamboo 8 form pressure differential.
In fig. 3 and 4: one end of the positive pressure side collecting cylinder 5, which is far away from the external thread plug 53, is provided with a positive pressure outlet pipe 9, one end of the negative pressure side collecting cylinder 7 is provided with a negative pressure outlet pipe 10, and one ends of the positive pressure outlet pipe 9 and the negative pressure outlet pipe 10 are provided with a differential pressure transmitter 11 together, so that the average differential pressure after collection can enter the differential pressure transmitter 11, and the measurement accuracy is improved.
In fig. 4 and 5: joint sealing washer 44 is located between screwed joint pipe 52 and the spacing ring 43, and the lower extreme of screwed joint pipe 52 is located the inboard of internal thread union 42, draws and presses pipe body 41 and screwed joint pipe 52 to pass through internal thread union 42 fixed connection to the convenient pipe 4 is pressed to the malleation side of drawing dismantles, and then is convenient for wash the pipeline, and can install fast after wasing.
In fig. 1 and 2: the positive pressure side collecting cylinder 5 and the negative pressure side collecting cylinder 7 are both seamless stainless steel pipes with phi 60x3, and the positive pressure sampling cylinder 3 and the negative pressure sampling cylinder 8 are both seamless stainless steel pipes with phi 42x3, so that the positive pressure side collecting cylinder 5, the negative pressure side collecting cylinder 7, the positive pressure sampling cylinder 3 and the negative pressure sampling cylinder 8 are not easy to leak due to corrosion, and further the measured differential pressure signal can be prevented from truly reflecting the flow of smoke in a flue.
The utility model discloses a theory of operation: the flue gas in the square flue respectively flows into a plurality of groups of positive pressure sampling cylinders 3 and negative pressure sampling cylinders 8, a differential pressure which is in a certain relation with the flow of fluid is generated in each group of positive pressure sampling cylinders 3 and negative pressure sampling cylinders 8, the flue gas in the positive pressure sampling cylinders 3 flows into the positive pressure side pressure leading pipes 4, the flue gas in the positive pressure side pressure leading pipes 4 is collected into the positive pressure side collecting cylinder 5, the positive pressure side collecting cylinder 5 has a pressure equalizing function, so that the pressure collection accuracy is improved, the flue gas in the negative pressure sampling cylinders 8 flows into the negative pressure side pressure leading pipes 6, the negative pressure side pressure leading pipes 6 are collected into the negative pressure side collecting cylinder 7, and similarly, the negative pressure side collecting cylinder 7 also has a pressure equalizing function, the differential pressure measured in each group is uniformly collected in the positive pressure side collecting cylinder 5 and the negative pressure side collecting cylinder 7 and then is output to the differential pressure transmitter 11, and the flow in the square flue 1 is detected through the differential pressure transmitter 11, and transmits the detected signal value to an external terminal device through differential pressure transmitter 11.
The above-mentioned, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. A multipoint full-section flue gas flow sampling device comprises a square flue (1) and a plurality of supporting beams (2) fixedly connected with the inner side wall of the square flue (1), and is characterized in that a plurality of groups of positive pressure sampling cylinders (3) are arranged on the same cross section of the inner side of the square flue (1), one side, close to the positive pressure sampling cylinders (3), of the same cross section of the inner side of the square flue (1) is provided with a negative pressure sampling cylinder (8), the top end of each positive pressure sampling cylinder (3) is positioned on the outer side of the square flue (1) and is provided with a positive pressure side pressure pipe (4), the top ends of the positive pressure side pressure pipes (4) are provided with a positive pressure side collecting cylinder (5) together, the top end of each negative pressure sampling cylinder (8) is positioned on the outer side of the square flue (1) and is provided with a negative pressure side pressure pipe (6), the top ends of the negative pressure side pressure leading pipes (6) are provided with a negative pressure side collecting cylinder (7) together;
the positive pressure side collecting cylinder (5) comprises a collecting cylinder body (51), a plurality of groups of threaded connector pipes (52) are arranged at the bottom end of the outer side of the collecting cylinder body (51), an external thread plug (53) is meshed and connected with one end of the collecting cylinder body (51), and a plug sealing ring (54) is sleeved at the joint of the external thread plug (53) and the collecting cylinder body (51);
the positive pressure side pressure-leading pipe (4) comprises a pressure-leading pipe body (41), a limiting ring (43) with an annular groove is fixedly connected to the upper end of the pressure-leading pipe body (41), an internal thread union (42) is slidably connected to the upper end of the outer side of the pressure-leading pipe body (41), and a joint sealing ring (44) is embedded into the annular groove of the limiting ring (43).
2. The multipoint full-section flue gas flow sampling device according to claim 1, wherein the turning and dead angle positions of the positive pressure sampling tube (3), the positive pressure side pressure introduction tube (4), the negative pressure side pressure introduction tube (6) and the negative pressure sampling tube (8) are respectively provided with a detachable union with a sealing ring, the detachable unions with the sealing rings are the same as the structures of the internal thread union (42) and the joint sealing ring (44), the ends of the positive pressure sampling tube (3), the positive pressure side collection tube (5), the negative pressure side collection tube (7) and the negative pressure sampling tube (8) are respectively provided with a detachable plug with a sealing ring, and the detachable plugs with the sealing rings are the same as the structures of the external thread plug (53) and the plug sealing ring (54).
3. The multipoint full-section flue gas flow sampling device according to claim 1, wherein one side of each positive pressure sampling cylinder (3) corresponds to one negative pressure sampling cylinder (8), and the positive pressure sampling cylinder (3) and the negative pressure sampling cylinder (8) are fixedly mounted on the support beam (2).
4. The multipoint full-section flue gas flow sampling device according to claim 1, characterized in that one side of one end of the positive pressure side collecting cylinder (5) far away from the external thread plug (53) is provided with a positive pressure outlet pipe (9), one end of the negative pressure side collecting cylinder (7) is provided with a negative pressure outlet pipe (10), and one ends of the positive pressure outlet pipe (9) and the negative pressure outlet pipe (10) are provided with a differential pressure transmitter (11) together.
5. The multipoint full-section flue gas flow sampling device according to claim 1, wherein the joint sealing ring (44) is located between the threaded joint pipe (52) and the limiting ring (43), the lower end of the threaded joint pipe (52) is located on the inner side of the internal thread union (42), and the pressure guide pipe body (41) is fixedly connected with the threaded joint pipe (52) through the internal thread union (42).
6. The multipoint full-section flue gas flow sampling device according to claim 1, wherein the positive pressure side collection cylinder (5) and the negative pressure side collection cylinder (7) are both seamless stainless steel pipes with phi 60x3, and the positive pressure sampling cylinder (3) and the negative pressure sampling cylinder (8) are both seamless stainless steel pipes with phi 42x 3.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921891835 | 2019-11-05 | ||
| CN2019218918355 | 2019-11-05 |
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| Publication Number | Publication Date |
|---|---|
| CN213121317U true CN213121317U (en) | 2021-05-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022145568.6U Expired - Fee Related CN213121317U (en) | 2019-11-05 | 2020-09-27 | Multipoint full-section flue gas flow sampling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111028964A (en) * | 2019-11-26 | 2020-04-17 | 中广核研究院有限公司 | Measuring tube structure for steam generator and steam generator device |
-
2020
- 2020-09-27 CN CN202022145568.6U patent/CN213121317U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111028964A (en) * | 2019-11-26 | 2020-04-17 | 中广核研究院有限公司 | Measuring tube structure for steam generator and steam generator device |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210504 Termination date: 20210927 |
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| CF01 | Termination of patent right due to non-payment of annual fee |