CN219223823U - Multi-point uniform speed type flow measuring device - Google Patents
Multi-point uniform speed type flow measuring device Download PDFInfo
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- CN219223823U CN219223823U CN202223261702.4U CN202223261702U CN219223823U CN 219223823 U CN219223823 U CN 219223823U CN 202223261702 U CN202223261702 U CN 202223261702U CN 219223823 U CN219223823 U CN 219223823U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The utility model belongs to the field of pipeline flow measurement, in particular to a multipoint uniform speed type flow measurement device, which aims at the problems that the existing conventional measurement device cannot meet the installation requirements of large and medium pipelines, the flow measurement is unstable after installation, the installation and maintenance of a wing type measurement device are inconvenient, the pressure loss is large, the flow of a bar flowmeter is unstable when a straight pipe section is insufficient, the output differential pressure value is small, the system sensitivity is small, a pressure taking hole is easy to be blocked and the like.
Description
Technical Field
The utility model relates to the technical field of pipeline flow measurement, in particular to a multipoint uniform speed type flow measurement device.
Background
In order to improve the efficiency of fire coal, save energy and reduce emission, automatic control and metering of flow in various pipelines are needed, but the following problems exist in actual metering:
1. the requirement of the straight pipe section of the conventional air volume measuring device is that the requirement of the front 10D and the requirement of the straight pipe section cannot be met by an air channel manufactured on site with the rear 5D, the installation requirement of large and medium-sized pipelines cannot be met, or normal metering cannot be carried out after the installation, and the flow measurement output cannot be linear or the signal fluctuation is large because the flow field does not reach the steady flow state due to the insufficient straight pipe section, so that the normal operation of an automatic control system cannot be realized.
2. The current common air volume measuring device in the market is a wing type measuring device and a bar type flowmeter, and the wing type measuring device is inconvenient to install and maintain and large in pressure loss due to structural reasons, and the bar type flowmeter is insufficient in flow stability and small in output differential pressure value when a straight pipe section is insufficient, so that a pressure taking hole is easy to block and the like.
In view of the above, the present document proposes a multipoint uniform velocity type flow measurement device.
Disclosure of Invention
The utility model provides a multipoint uniform speed type flow measuring device, which solves the defects that the conventional measuring device in the prior art cannot meet the installation requirements of large and medium-sized pipelines, the flow measurement is unstable after the installation, the installation and maintenance of a wing type measuring device are inconvenient, the pressure loss is large, the flow of a bar type flowmeter is not stable enough when the straight pipe section is insufficient, the output differential pressure value is small, the system sensitivity is small, the pressure taking hole is easy to block and the like.
The utility model provides the following technical scheme:
a multi-point uniform velocity flow measurement device comprising:
the positive pressure measuring unit comprises a first welding flange welded on the surface of a measured pipeline, a first mounting flange is fixedly connected to the upper surface of the first welding flange, a first pressure guiding pipe is inserted into the inner wall of the first mounting flange through a sealing gasket, a positive pressure chamber is arranged in the first pressure guiding pipe, the bottom end of the first pressure guiding pipe penetrates through the upper surface of the measured pipeline, a plurality of positive pressure sensors are fixedly connected to the outer wall of the first pressure guiding pipe, and two positive pressure guiding connectors are fixedly connected to the top end of the first pressure guiding pipe;
the negative pressure measuring unit comprises a second welding flange welded on the surface of a measured pipeline, a second installation flange is fixedly connected to the upper surface of the second welding flange, a second impulse pipe is inserted into the inner wall of the second installation flange through a sealing gasket, a negative pressure cavity is arranged in the second impulse pipe, the bottom end of the second impulse pipe penetrates through the upper surface of the measured pipeline, a plurality of negative pressure sensors are fixedly connected to the outer wall of the second impulse pipe, and two negative pressure leading joints are fixedly connected to the top end of the second impulse pipe.
Preferably, the positive pressure sensor comprises a positive pressure sensor main body, the positive pressure sensor main body is fixedly connected to the outer wall of the first pressure guide pipe, two symmetrical first pressure taking holes are communicated between the positive pressure sensor main body and the positive pressure chamber, a first guide surface is formed in one side of the positive pressure sensor main body, and the first guide surface is communicated with the two first pressure taking holes.
Preferably, the negative pressure sensor comprises a negative pressure sensor main body, the negative pressure sensor main body is fixedly connected to the outer wall of the second impulse pipe, two symmetrical second pressure taking holes are communicated between the negative pressure sensor main body and the negative pressure chamber, and a second diversion surface is formed in one side of the negative pressure sensor main body.
Preferably, the positive pressure sensor and the negative pressure sensor are both in spherical flat structures, and the external shapes of the positive pressure sensor and the negative pressure sensor are fish-shaped.
Preferably, the outer wall of the first impulse pipe is provided with at least one first reinforcing rib, and the outer wall of the second impulse pipe is provided with at least one second reinforcing rib.
Preferably, the number of the positive pressure sensor and the number of the negative pressure sensor are six.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the utility model as claimed.
According to the utility model, a novel flow measuring device formed by combining a plurality of flow measuring devices is adopted, a single-set or multi-set uniform-speed measuring scheme can be adopted according to the pipeline size, the novel flow measuring device can adapt to the measurement of small straight pipe sections of various pipelines with the diameters of more than 500mm, and the novel flow measuring device is convenient to install and maintain on site by adopting an inserted structural design;
according to the utility model, the fish-shaped structure can increase the length of the back flow edge of the positive pressure sensor, has a rectifying effect, so that a measured flow field is more stable, meanwhile, the resistance of the structure to a measuring medium is reduced, the pressure loss is smaller, the fish-shaped structure can increase the length of the back flow edge of the negative pressure sensor, the second pressure taking hole is far away from a wake area, the influence of vortex in the wake area on the second pressure taking hole is weakened, the output pressure difference is stable, the pressure signals taken by the first pressure taking hole and the second pressure taking hole are more stable, the flow coefficient is more stable, the output differential pressure value is 1.5 times of that of a common uniform velocity tube flowmeter, the whole flow measuring device has a larger differential pressure signal, the sensitivity of the whole measuring system is improved, the tangential point position of the incoming flow direction and the outer side of the fish-shaped is the highest in flow velocity, the static pressure is lowest, dust cannot stay, and a good anti-blocking effect is achieved;
the utility model is suitable for measuring the flow of the pipeline with the diameter of more than 500mm, is convenient to install and maintain, can reduce the resistance to the medium, has small pressure loss, ensures stable flow measurement, increases the output differential pressure value, improves the sensitivity of the system, and has better anti-blocking effect.
Drawings
FIG. 1 is a schematic diagram of an installation structure of a multi-point uniform velocity type flow measurement device according to an embodiment of the present utility model;
FIG. 2 is a schematic side view of a positive pressure measurement unit of a multi-point uniform velocity flow measurement device according to an embodiment of the present utility model;
FIG. 3 is a schematic cross-sectional view of a positive pressure sensor of a multi-point uniform velocity flow measurement device according to an embodiment of the present utility model;
FIG. 4 is a schematic side view of a negative pressure measurement unit of a multi-point uniform velocity flow measurement device according to an embodiment of the present utility model;
fig. 5 is a schematic cross-sectional view of a negative pressure sensor of a multi-point uniform velocity flow measurement device according to an embodiment of the present utility model.
Reference numerals:
1. a first welding flange; 2. a first mounting flange; 3. a first impulse pipe; 301. a positive pressure chamber; 4. a positive pressure sensor; 401. a positive pressure sensor body; 402. a first pressure taking hole; 403. a first guide surface; 5. a positive pressure leading joint; 6. a second welding flange; 7. a second mounting flange; 8. a second impulse pipe; 801. a negative pressure chamber; 9. a negative pressure sensor; 901. a negative pressure sensor body; 902. a second pressure taking hole; 903. a second guide surface; 10. a negative pressure leading joint; 11. a first reinforcing rib; 12. and a second reinforcing rib.
Detailed Description
Embodiments of the present utility model will be described below with reference to the accompanying drawings in the embodiments of the present utility model.
In describing embodiments of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled" and "mounted" should be interpreted broadly, and for example, "coupled" may or may not be detachably coupled; may be directly connected or indirectly connected through an intermediate medium. In addition, "communication" may be direct communication or may be indirect communication through an intermediary. Wherein, "fixed" means that the relative positional relationship is not changed after being connected to each other. References to orientation terms, such as "inner", "outer", "top", "bottom", etc., in the embodiments of the present utility model are merely to refer to the orientation of the drawings and, therefore, the use of orientation terms is intended to better and more clearly illustrate and understand the embodiments of the present utility model, rather than to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the embodiments of the present utility model.
In embodiments of the present utility model, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In the embodiment of the present utility model, "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the utility model. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
Example 1
Referring to fig. 1, 2 and 4, the multi-point uniform velocity type flow measuring device comprises a positive pressure measuring unit, wherein the positive pressure measuring unit comprises a first welding flange 1 welded on the surface of a measured pipeline, the upper surface of the first welding flange 1 is fixedly connected with a first mounting flange 2, the inner wall of the first mounting flange 2 is inserted with a first impulse pipe 3 through a sealing gasket, a positive pressure chamber 301 is arranged in the first impulse pipe 3, the bottom end of the first impulse pipe 3 penetrates through the upper surface of the measured pipeline, the outer wall of the first impulse pipe 3 is fixedly connected with a plurality of positive pressure sensors 4, and the top end of the first impulse pipe 3 is fixedly connected with two positive pressure leading joints 5; the negative pressure measuring unit comprises a second welding flange 6 welded on the surface of a measured pipeline, a second installation flange 7 is fixedly connected to the upper surface of the second welding flange 6, a second impulse pipe 8 is inserted into the inner wall of the second installation flange 7 through a sealing gasket, a negative pressure cavity 801 is arranged in the second impulse pipe 8, the bottom end of the second impulse pipe 8 penetrates through the upper surface of the measured pipeline, a plurality of negative pressure sensors 9 are fixedly connected to the outer wall of the second impulse pipe 8, and two negative pressure leading joints 10 are fixedly connected to the top end of the second impulse pipe 8.
In the above technical solution, a plurality of positive pressure signals can be measured by using the positive pressure measuring unit, the plurality of positive pressure signals are collected in the positive pressure chamber 301, and then are transmitted to the secondary instrument by the positive pressure leading connector 5, a plurality of negative pressure signals can be measured by using the negative pressure measuring unit, the plurality of negative pressure signals are collected in the negative pressure chamber 801, and then are transmitted to the secondary instrument by the negative pressure leading connector 10, and the secondary instrument calculates the final differential pressure value by the received positive pressure signals and negative pressure signals.
Example two
Referring to fig. 1, 2 and 4, the multi-point uniform velocity type flow measuring device comprises a positive pressure measuring unit, wherein the positive pressure measuring unit comprises a first welding flange 1 welded on the surface of a measured pipeline, the upper surface of the first welding flange 1 is fixedly connected with a first mounting flange 2, the inner wall of the first mounting flange 2 is inserted with a first impulse pipe 3 through a sealing gasket, a positive pressure chamber 301 is arranged in the first impulse pipe 3, the bottom end of the first impulse pipe 3 penetrates through the upper surface of the measured pipeline, the outer wall of the first impulse pipe 3 is fixedly connected with a plurality of positive pressure sensors 4, and the top end of the first impulse pipe 3 is fixedly connected with two positive pressure leading joints 5; the negative pressure measuring unit comprises a second welding flange 6 welded on the surface of a measured pipeline, a second installation flange 7 is fixedly connected to the upper surface of the second welding flange 6, a second impulse pipe 8 is inserted into the inner wall of the second installation flange 7 through a sealing gasket, a negative pressure cavity 801 is arranged in the second impulse pipe 8, the bottom end of the second impulse pipe 8 penetrates through the upper surface of the measured pipeline, a plurality of negative pressure sensors 9 are fixedly connected to the outer wall of the second impulse pipe 8, and two negative pressure leading joints 10 are fixedly connected to the top end of the second impulse pipe 8.
In the above technical solution, a plurality of positive pressure signals can be measured by using the positive pressure measuring unit, the plurality of positive pressure signals are collected in the positive pressure chamber 301, and then are transmitted to the secondary instrument by the positive pressure leading connector 5, a plurality of negative pressure signals can be measured by using the negative pressure measuring unit, the plurality of negative pressure signals are collected in the negative pressure chamber 801, and then are transmitted to the secondary instrument by the negative pressure leading connector 10, and the secondary instrument calculates the final differential pressure value by the received positive pressure signals and negative pressure signals.
Referring to fig. 3, the positive pressure sensor 4 includes a positive pressure sensor main body 401, the positive pressure sensor main body 401 is fixedly connected to the outer wall of the first pressure guiding tube 3, two symmetrical first pressure taking holes 402 are communicated between the positive pressure sensor main body 401 and the positive pressure chamber 301, a first flow guiding surface 403 is provided on one side of the positive pressure sensor main body 401, and the first flow guiding surface 403 is communicated with the two first pressure taking holes 402.
In the above technical solution, the medium contacts the positive pressure sensor 4 and then separates along the surface of the positive pressure sensor 4 and passes through the side, at this time, a positive pressure signal is formed in the first pressure guiding tube 3, and a plurality of positive pressure signals are integrated in the first pressure guiding tube 3 to form a final positive pressure output signal.
Referring to fig. 5, the negative pressure sensor 9 includes a negative pressure sensor main body 901, the negative pressure sensor main body 901 is fixedly connected to the outer wall of the second impulse pipe 8, two symmetrical second pressure taking holes 902 are communicated between the negative pressure sensor main body 901 and the negative pressure chamber 801, and a second diversion surface 903 is provided on one side of the negative pressure sensor main body 901.
In the above technical solution, the medium contacts the negative pressure sensor 9 and then separates along the surface of the negative pressure sensor 9 and passes through the side edge, at this time, a negative pressure signal is formed in the second impulse pipe 8, and a plurality of negative pressure signals are integrated in the second impulse pipe 8 to form a final negative pressure output signal.
Referring to fig. 1 to 5, the positive pressure sensor 4 and the negative pressure sensor 9 each have a spherical flat structure, and each have a fish-shaped external shape.
In the above technical scheme, the fish-shaped structure can increase the length of the back flow edge of the positive pressure sensor 4, has the rectifying function, so that the measured flow field is more stable, meanwhile, the resistance of the structure to the measured medium is reduced, the pressure loss is smaller, the fish-shaped structure can increase the length of the back flow edge of the negative pressure sensor 9, the second pressure taking hole 902 is far away from the wake region, the influence of vortex in the wake region on the second pressure taking hole 902 is weakened, the output pressure difference is stable, the pressure signals taken by the first pressure taking hole 402 and the second pressure taking hole 902 are more stable, the flow coefficient is more stable, the output differential pressure value is 1.5 times that of a common uniform velocity tube flowmeter, the whole flow measuring device has a larger differential pressure signal, the sensitivity of the whole measuring system is improved, the second pressure taking hole is positioned at the tangential point position of the incoming flow direction and the outside of the fish, the point flow velocity is the highest, the static pressure is the lowest, and the dust cannot stay, and the anti-blocking function is better.
Referring to fig. 2 and 4, the outer wall of the first impulse pipe 3 is provided with at least one first reinforcing rib 11 and the outer wall of the second impulse pipe 8 is provided with at least one second reinforcing rib 12.
In the above technical scheme, the first reinforcing rib 11 can improve the stability of the first impulse pipe 3, avoid the situation that the first impulse pipe 3 is bent under the long-term pushing of the medium, and the second reinforcing rib 12 is the same.
Referring to fig. 1, 2 and 4, the positive pressure sensor 4 and the negative pressure sensor 9 are each six.
In the above technical scheme, the arrangement of the positive pressure sensors 4 and the negative pressure sensors 9 can enable the device to measure a plurality of nodes simultaneously, so as to obtain the differential pressure value of the whole section of the measured pipeline, and further, the number and the specification of the positive pressure sensors 4 and the negative pressure sensors 9 can be adjusted according to the diameter of the pipeline.
The working principle and the using flow of the technical scheme are as follows: during installation, the first welding flange 1 and the second welding flange 6 are welded on the surface of a pipeline, then the first installation flange 2 and the second installation flange 7 are installed by bolts, then the first impulse pipe 3 is inserted into the pipeline to be tested and is sealed and fixed by a sealing gasket, the second impulse pipe 8 is similarly arranged, and measurement is carried out after the installation is completed;
during measurement, medium is introduced into a measured pipeline, the medium is contacted with a positive pressure measuring unit and a negative pressure processing unit to form differential pressure signals, wherein the medium is contacted with a positive pressure sensor 4 to form positive pressure signals, a plurality of positive pressure signals enter a positive pressure chamber 301 to be summarized, the summarized positive pressure signals are conveyed to the positive pressure side of a secondary instrument through a positive pressure leading joint 5, then positive pressure data are recorded and obtained, the medium is contacted with a negative pressure sensor 9 to form negative pressure signals, a plurality of negative pressure signals enter a negative pressure chamber 801 to be summarized, the summarized negative pressure signals are conveyed to the negative pressure side of the secondary instrument through a negative pressure leading joint 10, then negative pressure data are recorded and obtained, and finally differential pressure values of the whole section are calculated and data are obtained.
The present utility model is not limited to the above embodiments, and any person skilled in the art can easily think about the changes or substitutions within the technical scope of the present utility model, and the changes or substitutions are intended to be covered by the scope of the present utility model; embodiments of the utility model and features of the embodiments may be combined with each other without conflict. Therefore, the protection scope of the utility model is subject to the protection scope of the claims.
Claims (6)
1. The utility model provides a multi-point uniform velocity type flow measurement device which characterized in that includes:
the positive pressure measuring unit comprises a first welding flange (1) welded on the surface of a measured pipeline, a first mounting flange (2) is fixedly connected to the upper surface of the first welding flange (1), a first pressure guiding pipe (3) is inserted into the inner wall of the first mounting flange (2) through a sealing gasket, a positive pressure chamber (301) is arranged in the first pressure guiding pipe (3), the bottom end of the first pressure guiding pipe (3) penetrates through the upper surface of the measured pipeline, a plurality of positive pressure sensors (4) are fixedly connected to the outer wall of the first pressure guiding pipe (3), and two positive pressure guiding joints (5) are fixedly connected to the top end of the first pressure guiding pipe (3);
the negative pressure measuring unit comprises a second welding flange (6) welded on the surface of a measured pipeline, a second mounting flange (7) is fixedly connected to the upper surface of the second welding flange (6), a second impulse pipe (8) is inserted into the inner wall of the second mounting flange (7) through a sealing gasket, a negative pressure cavity (801) is formed in the second impulse pipe (8), the bottom end of the second impulse pipe (8) penetrates through the upper surface of the measured pipeline, a plurality of negative pressure sensors (9) are fixedly connected to the outer wall of the second impulse pipe (8), and two negative pressure leading connectors (10) are fixedly connected to the top end of the second impulse pipe (8).
2. The multipoint uniform velocity type flow measurement device according to claim 1, wherein the positive pressure sensor (4) comprises a positive pressure sensor main body (401), the positive pressure sensor main body (401) is fixedly connected to the outer wall of the first pressure guiding pipe (3), two symmetrical first pressure taking holes (402) are communicated between the positive pressure sensor main body (401) and the positive pressure chamber (301), a first flow guiding surface (403) is formed on one side of the positive pressure sensor main body (401), and the first flow guiding surface (403) is communicated with the two first pressure taking holes (402).
3. The multipoint uniform velocity type flow measuring device according to claim 2, wherein the negative pressure sensor (9) comprises a negative pressure sensor main body (901), the negative pressure sensor main body (901) is fixedly connected to the outer wall of the second impulse pipe (8), two symmetrical second pressure taking holes (902) are communicated between the negative pressure sensor main body (901) and the negative pressure chamber (801), and a second diversion surface (903) is formed on one side of the negative pressure sensor main body (901).
4. A multipoint uniform velocity type flow measurement apparatus according to claim 3, wherein the positive pressure sensor (4) and the negative pressure sensor (9) each adopt a spherical flat structure, and have a fish-shaped outer shape.
5. The multipoint uniform velocity type flow measuring device according to any one of claims 1 to 4, wherein the outer wall of the first impulse pipe (3) is provided with at least one first reinforcing rib (11), and the outer wall of the second impulse pipe (8) is provided with at least one second reinforcing rib (12).
6. The multipoint uniform velocity type flow measuring apparatus according to any one of claims 1 to 4, wherein the positive pressure sensor (4) and the negative pressure sensor (9) are each six.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223261702.4U CN219223823U (en) | 2022-12-06 | 2022-12-06 | Multi-point uniform speed type flow measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223261702.4U CN219223823U (en) | 2022-12-06 | 2022-12-06 | Multi-point uniform speed type flow measuring device |
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| Publication Number | Publication Date |
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| CN219223823U true CN219223823U (en) | 2023-06-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223261702.4U Active CN219223823U (en) | 2022-12-06 | 2022-12-06 | Multi-point uniform speed type flow measuring device |
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| CN (1) | CN219223823U (en) |
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- 2022-12-06 CN CN202223261702.4U patent/CN219223823U/en active Active
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