CN210424149U - Adjustable gas current limiter with microporous structure - Google Patents
Adjustable gas current limiter with microporous structure Download PDFInfo
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- CN210424149U CN210424149U CN201921417254.8U CN201921417254U CN210424149U CN 210424149 U CN210424149 U CN 210424149U CN 201921417254 U CN201921417254 U CN 201921417254U CN 210424149 U CN210424149 U CN 210424149U
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Abstract
The utility model discloses an adjustable microporous structure gas current limiter, the main section of thick bamboo of current limiter is hollow structure, wherein, micropore core and gland are located the main section of thick bamboo of current limiter, the tip of first standard screwed pipe joint inserts the free sealed end of the main section of thick bamboo of current limiter, the tip of second standard screwed pipe joint inserts the fixed through-flow end of the main section of thick bamboo of current limiter, and the tip of first standard screwed pipe joint contacts with one end of gland, the tip of micropore core inserts in the other end of gland, be provided with O type sealing washer between the inner wall of micropore core and the main section of thick bamboo of current limiter, the gland is used for compressing tightly fixed micropore core and O type sealing washer; the gland, the microporous core body, the first standard threaded pipe joint and the second standard threaded pipe joint are all of a hollow structure, the first standard threaded pipe joint, the gland, the microporous core body and the second standard threaded pipe joint are communicated in sequence, and the current limiter is high in adaptability, low in cost and convenient to use.
Description
Technical Field
The utility model belongs to the technical field of the continuous on-line monitoring equipment of flue gas, a gaseous current limiter of adjustable cellular structure is related to.
Background
Aiming at the pollution of various harmful components to the atmosphere in the tail flue gas emission process of the boiler of a coal-fired and gas-fired power plant, relevant national departments have made strict regulations on the index limit value of pollutant emission in the flue gas, and meanwhile, the coal-fired and gas-fired boilers in the whole country have successively completed the environmental protection emission reconstruction. The smoke continuous on-line monitor is used as an original acquisition device for pollutant emission data, and becomes an important instrument, the accuracy of data measurement, the reliability of operation and the convenience of maintenance directly influence the operation management of an owner unit on related systems, and even the effective supervision of pollutant emission by an environmental protection department.
The continuous on-line monitoring equipment for flue gas is a precise instrument with high requirements on working environment, and the accessories of a boiler flue and a chimney are high-temperature and high-dust environments, so that the continuous on-line monitoring equipment for flue gas is extremely unfavorable for long-term and stable operation of the on-line monitoring equipment. At present, related online monitoring equipment mostly adopts an online extraction method, and an air extraction pump is used for extracting original flue gas to be detected from a flue to an analysis host arranged in a relatively good environment through a sampling pipeline. And then, calculating the concentration of pollutants in the discharged original flue gas by measuring the ratio of the fixed components in the flue gas and the flow of the original flue gas.
The online flue gas monitoring equipment adopting the ectopic arrangement air exhaust principle has higher requirements on the selection of the flow of the extracted flue gas. Too high bleed air flow can lead to the accelerated wear of through-flow pipeline in front end ash filter and the system, also can have more waste gas to be discharged by equipment analysis cabinet, if the improper secondary pollution to the microenvironment that can cause of ventilation measure. And too low exhaust flow can cause the instrument to measure data and delay greatly, is unfavorable for the instrument to exert the function of real-time monitoring. Meanwhile, low flow rate can also cause foreign matter accumulation in the through-flow pipeline and the internal through-flow area, which is not beneficial to long-time operation of the online monitoring instrument. Therefore, the operation of the extraction type smoke online monitoring equipment is directly influenced by the proper air extraction flow.
However, in the actual use process of the online flue gas monitoring equipment, the online flue gas monitoring equipment is required to be capable of adapting to different flue gas pressures, flow rates and back pressure environments, even an arrangement scheme, and the factors can greatly influence the air extraction flow of the equipment. If the air pump selection type is adjusted according to different use conditions, the inconvenience of complete set manufacturing and the non-uniform spare part management are caused. The gas flow limiting device with adjustable flow is adopted, the air exhaust flow can be simply and rapidly adjusted according to different use conditions, the debugging and the use of related equipment are greatly facilitated, and the operation and maintenance cost is reduced.
In conclusion, the extraction type flue gas online monitoring system can quickly, accurately and conveniently adjust the air extraction flow under different use conditions, directly influences the operation effect of related equipment systems, improves the management level, and has a certain positive effect on the stable, continuous and effective operation of online monitoring equipment.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide an adjustable microporous structure gas current limiter, this current limiter's adaptability is stronger, and the cost is lower, and it is comparatively convenient to use.
In order to achieve the above object, the adjustable microporous structure gas flow restrictor of the present invention comprises a main tube of the flow restrictor, a gland, an O-ring, a microporous core, a first standard screwed pipe joint and a second standard screwed pipe joint;
the main cylinder of the current limiter is of a hollow structure, wherein the microporous core body and the gland are positioned in the main cylinder of the current limiter, the end part of the first standard threaded pipe joint is inserted into the free sealing end of the main cylinder of the current limiter, the end part of the second standard threaded pipe joint is inserted into the fixed through-flow end of the main cylinder of the current limiter, the end part of the first standard threaded pipe joint is contacted with one end of the gland, the end part of the microporous core body is inserted into the other end of the gland, an O-shaped sealing ring is arranged between the microporous core body and the inner wall of the main cylinder of the current limiter, and the gland is used for compressing;
the gland, the microporous core body, the first standard threaded pipe joint and the second standard threaded pipe joint are all of a hollow structure, and the first standard threaded pipe joint, the gland, the microporous core body and the second standard threaded pipe joint are communicated in sequence.
The flow restrictor main cylinder is in threaded connection with the end of the first standard threaded pipe joint and the end of the second standard threaded pipe joint.
The step type through hole has been seted up at the middle part of gland, the micropore core insert in the great one side of size in the step type through hole, and the tip of micropore core carries on spacingly through the less one side of size in the step type through hole.
The inner bore diameter of the fixed flow end of the main cylinder of the current limiter and the inner bore diameter of the gland are both larger than the inner bore diameter of the microporous core body.
And a thread withdrawal groove is formed at the bottom of the internal thread at the free sealing end of the main cylinder of the current limiter.
The outer diameter of the gland is smaller than the small diameter of the internal thread of the free sealing end of the main cylinder of the flow restrictor, and the wall thickness of the gland is larger than the depth of the thread withdrawal groove of the free sealing end of the main cylinder of the flow restrictor.
The utility model discloses following beneficial effect has:
adjustable microporous structure gas current limiter when concrete operation, the tip of first standard screwed pipe joint inserts in the one end of the main section of thick bamboo of current limiter, the tip of second standard screwed pipe joint inserts in the other end of the main section of thick bamboo of current limiter, adopt the mode that the screw thread inserts, adapt to the main section of thick bamboo of current limiter of each specification pipe-line system, in addition, the tip and the gland of first standard screwed pipe joint contact, sticis fixed micropore core and O type sealing washer through first standard screwed pipe joint cooperation gland, realize the reasonable of micropore core and O type sealing washer, effective combination, in order to form complete, firm gaseous current limiting whole subassembly. In addition, when using, will the utility model discloses when inserting extraction formula flue gas on-line monitoring device gas phase pipeline, can eliminate various factors to the influence of gas flow to a certain extent, keep gas flow's relatively stable, convenient operation, simple, safe and reliable, the practicality is strong, can the efficient accomplish in practical application operations such as design, processing, equipment, installation, debugging, maintenance, improved extraction formula flue gas on-line monitoring device's operational reliability and measurement accuracy greatly.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is an exploded view of the present invention.
Wherein, 1 is a main cylinder of the current limiter, 2 is a gland, 3 is an O-shaped sealing ring, 4 is a microporous core body, 51 is a first standard threaded pipe joint, and 52 is a second standard threaded pipe joint.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 and 2, the adjustable microporous structure gas flow restrictor of the present invention includes a main tube 1 of the flow restrictor, a gland 2, an O-ring 3, a microporous core 4, a first standard threaded pipe joint 51 and a second standard threaded pipe joint 52; the main tube 1 of the flow restrictor is of a hollow structure, wherein the microporous core 4 and the gland 2 are positioned in the main tube 1 of the flow restrictor, the end of the first standard threaded tube joint 51 is inserted into the free sealing end of the main tube 1 of the flow restrictor, the end of the second standard threaded tube joint 52 is inserted into the fixed flow-through end of the main tube 1 of the flow restrictor, the end of the first standard threaded tube joint 51 is in contact with one end of the gland 2, the end of the microporous core 4 is inserted into the other end of the gland 2, an O-shaped sealing ring 3 is arranged between the microporous core 4 and the inner wall of the main tube 1 of the flow restrictor, and the gland 2 is used for compressing and fixing the microporous core 4 and the O; the gland 2, the microporous core 4, the first standard threaded pipe joint 51 and the second standard threaded pipe joint 52 are all of a hollow structure, the first standard threaded pipe joint 51, the gland 2, the microporous core 4 and the second standard threaded pipe joint 52 are sequentially communicated, and the flow restrictor main cylinder 1 is in threaded connection with the end portion of the first standard threaded pipe joint 51 and the end portion of the second standard threaded pipe joint 52.
When the microporous core body 4 works, the airflow is limited by the on-way resistance of micropores, the inner hole diameter of the microporous core body 4 is calculated according to the airflow needing to be limited, and the inner hole diameter is determined by comprehensively considering various factors influencing the airflow; the outer diameter of the microporous core body 4 is reasonably selected according to the determined inner aperture and considering the manufacturing process of related special materials; the material of the microporous core body 4 needs to be selected according to various factors of the air flow, such as dust concentration, types and the like, which can wear the core body, and quartz materials are commonly used in the flue gas online monitoring device.
The size of the O-shaped sealing ring 3 is selected according to the outer diameter of the microporous core body 4; the material of the O-shaped sealing ring 3 is selected according to the gas property, and the material of the O-shaped sealing ring 3 in the online flue gas monitoring device is commonly selected from fluororubber.
After the microporous core body 4 and the O-shaped sealing ring 3 are combined, the free sealing end of the current limiter main cylinder 1 is pushed into a central hole of the current limiter main cylinder 1; the central aperture of the main cylinder 1 of the current limiter is slightly larger than the outer diameter of the microporous core 4, so that the microporous core 4 is effectively supported and protected while the smooth installation of the microporous core 4 is ensured; the central aperture of the main tube 1 of the current limiter is not too large, otherwise the sealing effect of the O-shaped sealing ring 3 is affected, and the microporous core body 4 cannot be effectively protected.
The outer diameter of the gland 2 is slightly smaller than the small diameter of the internal thread of the free sealing end of the main cylinder 1 of the current limiter, the gland 2 is guaranteed to be smoothly loaded, and the micropore core body 4 and the O-shaped sealing ring 3 can be effectively compressed.
The through-flow hole of the fixed through-flow end of the main cylinder 1 of the current limiter and the through-flow hole diameter of the gland 2 should be slightly larger than the inner hole diameter of the microporous core 4, i.e. in fig. 1, the dimension D is larger than the dimension C, so as to ensure that the air flow does not directly impact the main bodies of the main cylinder 1 and the gland 2 of the current limiter and avoid the abrasion of the main structure of the current limiter by the air flow.
The sum of the depth of the central hole of the main cylinder 1 of the current limiter and the depth of the central hole of the gland 2 is slightly larger than the length of the microporous core body 4, namely, in the figure 1, the dimension F is larger than the dimension E, so that the brittle material core body is ensured not to bear excessive pressure stress, and the service life of the core body is prolonged.
The outer diameter of the main cylinder 1 of the current limiter is close to the external dimension of a matched standard threaded joint, so that the whole appearance of the current limiter is kept smooth, the requirement on space is low during installation, and the current limiter and a pipeline can be kept in good integrity.
After the gland 2 is pushed into the main tube 1 of the current limiter to compress the microporous core 4 and the O-shaped sealing ring 3, the outward side of the gland is slightly shallower than the thread depth of the free sealing end of the main tube 1 of the current limiter, namely, the dimension A is smaller than the dimension B in fig. 1. After the standard threaded connector is screwed into the main tube 1 of the current limiter, the gland 2 can further compress the O-shaped sealing ring 3, and more effective fixation and protection are provided for the microporous core body 4.
The annular sealing groove at the free sealing end of the main cylinder 1 of the current limiter is in a single-side open type, and the annular sealing groove is matched with the gland 2 to form a standard annular sealing groove matched with the O-shaped sealing ring 3, so that the main cylinder 1 of the current limiter and the O-shaped sealing ring 3 are conveniently machined and installed in place, and the current limiter is more convenient and faster to replace the microporous core 4.
Preferably, a tool withdrawal groove structure with a certain depth is designed below the internal thread of the free sealing end of the main cylinder 1 of the flow restrictor, the structure can ensure the complete penetration of the internal thread, so that the standard threaded joint can be screwed more thoroughly, and effective pressure is applied to the gland 2. In addition, the tool withdrawal groove structure can also ensure that the contact surface of the gland 2 and the main cylinder 1 of the current limiter is more flat and compact, and the situation that the O-shaped sealing ring 3 cannot be tightly pressed by the gland 2 due to the existence of a processing error fillet and the sealing is not tight can be avoided.
In addition, when the flow restrictor is installed on a pipeline, the flow restrictor is directly connected with the pipeline through the first standard threaded pipe joint 51 and the second standard threaded pipe joint 52, and in actual operation, the microporous core body 4 can be replaced, so that the flow restrictor can be quickly adapted to various operation conditions, and the gas flow of related devices can achieve ideal use effects.
Claims (6)
1. The adjustable gas flow limiter with the microporous structure is characterized by comprising a main flow limiter cylinder (1), a gland (2), an O-shaped sealing ring (3), a microporous core body (4), a first standard threaded pipe joint (51) and a second standard threaded pipe joint (52);
the flow restrictor main cylinder (1) is of a hollow structure, wherein a microporous core body (4) and a gland (2) are positioned in the flow restrictor main cylinder (1), the end part of a first standard threaded pipe joint (51) is inserted into the free sealing end of the flow restrictor main cylinder (1), the end part of a second standard threaded pipe joint (52) is inserted into the fixed through-flow end of the flow restrictor main cylinder (1), the end part of the first standard threaded pipe joint (51) is in contact with one end of the gland (2), the end part of the microporous core body (4) is inserted into the other end of the gland (2), an O-shaped sealing ring (3) is arranged between the microporous core body (4) and the inner wall of the flow restrictor main cylinder (1), and the gland (2) is used for compressing and fixing the microporous core body (4) and the O-shaped sealing ring (3);
the gland (2), the microporous core body (4), the first standard threaded pipe joint (51) and the second standard threaded pipe joint (52) are all of a hollow structure, and the first standard threaded pipe joint (51), the gland (2), the microporous core body (4) and the second standard threaded pipe joint (52) are communicated in sequence.
2. The tunable microporous structure gas flow restrictor of claim 1, characterized in that the flow restrictor main cylinder (1) is screwed to both the end of the first standard threaded pipe joint (51) and the end of the second standard threaded pipe joint (52).
3. The adjustable microporous structure gas flow limiter of claim 1, wherein the middle part of the gland (2) is provided with a step-shaped through hole, the microporous core (4) is inserted into the larger side of the step-shaped through hole, and the end of the microporous core (4) is limited by the smaller side of the step-shaped through hole.
4. The tunable microporous structure gas flow restrictor of claim 1, characterized in that the inner bore diameter of the main tube (1) of the flow restrictor and the inner bore diameter of the gland (2) are both larger than the inner bore diameter of the microporous core (4).
5. An adjustable microporous structure gas flow restrictor according to claim 1 characterized in that the threaded bottom of the free sealed end of the flow restrictor main cylinder (1) is provided with a thread relief groove.
6. The adjustable microporous structure gas flow restrictor of claim 5, characterized in that the external diameter of the gland (2) is smaller than the small diameter of the internal thread of the free sealing end of the main cylinder (1) of the flow restrictor, and the wall thickness of the gland (2) is larger than the depth of the thread relief groove of the free sealing end of the main cylinder (1) of the flow restrictor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921417254.8U CN210424149U (en) | 2019-08-28 | 2019-08-28 | Adjustable gas current limiter with microporous structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921417254.8U CN210424149U (en) | 2019-08-28 | 2019-08-28 | Adjustable gas current limiter with microporous structure |
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| CN210424149U true CN210424149U (en) | 2020-04-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245265A1 (en) * | 2022-06-19 | 2023-12-28 | World Gás Ltda | Molecular repression device for gas-fed low-pressure systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245265A1 (en) * | 2022-06-19 | 2023-12-28 | World Gás Ltda | Molecular repression device for gas-fed low-pressure systems |
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