CN220853730U - Dynamic compensation type thermal type gas flowmeter - Google Patents
Dynamic compensation type thermal type gas flowmeter Download PDFInfo
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- CN220853730U CN220853730U CN202322694955.9U CN202322694955U CN220853730U CN 220853730 U CN220853730 U CN 220853730U CN 202322694955 U CN202322694955 U CN 202322694955U CN 220853730 U CN220853730 U CN 220853730U
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- 238000001514 detection method Methods 0.000 claims abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 32
- 239000000523 sample Substances 0.000 claims description 18
- 230000007306 turnover Effects 0.000 claims 2
- 238000005259 measurement Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
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Abstract
The utility model discloses a dynamic compensation type thermal type gas flowmeter in the technical field of gas flowmeters, which comprises a flow pipe, wherein two ends of the flow pipe are respectively connected with an external gas flowing pipeline, a patch type thermometer is arranged on the surface of the flow pipe and used for detecting the gas temperature in the flow pipe, a first temperature detection structure is connected to the top of the flow pipe through a jacking pipe, a temperature compensation component is arranged at the top of the first temperature detection structure and comprises an outer pipe, and an inner pipe is coaxially connected to the inner part of the outer pipe. According to the utility model, the dynamic compensation is carried out on the heat added or lost in the heat exchange process of the flowmeter, so that the measurement accuracy of the flowmeter on the gas flow rate can be improved, the error between the measurement result and the actual measurement value is reduced, the measurement accuracy of the flowmeter is improved, the contact area between the inner tube and the compensation liquid is increased by arranging the inner tube with a plurality of sharp corner structures, and the compensation efficiency is improved.
Description
Technical Field
The utility model relates to the technical field of gas flow meters, in particular to a dynamic compensation type thermal gas flow meter.
Background
The gas flow meter is a meter that measures the flow of gas. The amount of gas flowing through was recorded in the piping. Thermal diffusion flowmeters are widely used flow metering devices that rely on measuring the amount of heat carried away by a fluid by a sensing element to determine the flow rate. One commonly used sensing element is a resistance temperature monitor RTD, whose resistance changes with its own temperature. A typical thermal diffusion flow meter employs two RTD elements, one heated as an active element and the other unheated as a reference element.
However, in the existing dynamic compensation type thermal gas flowmeter, in the process of detecting the temperature of the fluid, the gas flow rate is affected by the temperature due to heat exchange between the gas and the pipeline as well as between the pipeline and the external environment, so that an error exists between a measurement result and a theoretical value.
Disclosure of utility model
The utility model aims to provide a dynamic compensation type thermal gas flowmeter so as to solve the problem that the proposed measured value and the true value have errors.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
The utility model provides a dynamic compensation formula hot type gas flowmeter, includes the runner pipe, and the both ends of runner pipe are connected with outside air flow through pipeline respectively, the surface mounting of runner pipe has the SMD thermometer, and the SMD thermometer is used for measuring the gas temperature in the runner pipe to observe the influence of temperature variation to the gas velocity of flow, so that quick compensation adjustment to temperature reduces the error, concretely compensation mode includes when the temperature that the SMD thermometer measured is less than outside ambient temperature, indicates that the gas in the runner pipe absorbs heat to the external world, needs to eliminate the heat that the gas in the runner pipe absorbed to the external world; otherwise, the heat released by the gas in the flow pipe to the outside needs to be eliminated, the patch thermometer detects the temperature of the gas in the flow pipe, the top of the flow pipe is connected with a first temperature detection structure through a jacking pipe, the top of the first temperature detection structure is provided with a temperature compensation component, the temperature compensation component comprises an outer pipe, the inner part of the outer pipe is coaxially connected with an inner pipe, a cavity formed by the outer pipe and the inner pipe is connected with a water inlet and outlet pipeline component in a penetrating way, the top of the water inlet and outlet pipeline component is provided with a second temperature detection structure, the top of the second temperature detection structure is connected with a flow meter through a bolt, specifically, when the temperature measured by the patch thermometer is lower than the external environment temperature, the heat absorbed by the gas in the flow pipe needs to be eliminated, therefore, the low-temperature water flow is led into a water inlet channel to absorb the flow through the outer pipe, and when the measured results of the patch thermometer, the first temperature probe and the second temperature probe are in a standard error range, the compensation mechanism is effective; when the gas in the flow pipe releases heat to the outside, the heat released by the gas in the flow pipe to the outside needs to be eliminated, and the temperature measured by the patch thermometer is higher than the external environment temperature, and the water flow with the temperature higher than the temperature measured by the patch thermometer is introduced into the water inlet channel, so that the temperature of the gas in the flow pipe can be compensated, and the measurement accuracy of the gas flow under a compensation mechanism is improved.
As a further scheme of the utility model: threaded joints are welded at two ends of the flow pipe, and the flow pipe is a three-way pipeline.
As a further scheme of the utility model: the first temperature detection structure comprises a detection cavity and a first temperature probe, and the first temperature probe penetrates through the detection cavity.
As a further scheme of the utility model: the inner pipe is a hollow pipeline and comprises a side wall with a plurality of sharp corner structures, and the plurality of sharp corner structures are distributed in an equidistant circumferential array.
As a further scheme of the utility model: the water inlet and outlet pipeline assembly comprises a water inlet channel and a water outlet channel, and a one-way valve is arranged on the surface of the water outlet channel.
As a further scheme of the utility model: the second temperature detection structure comprises a detection chamber, a second temperature probe is arranged on the side face of the detection chamber, a connecting rod penetrates through the side face of the detection chamber, and one end of the connecting rod is connected with a temperature display screen.
Compared with the prior art, the utility model has the beneficial effects that:
According to the utility model, the measuring accuracy of the flowmeter to the gas flow rate can be improved, the error between the measuring result and the actual measuring value can be reduced, and the measuring accuracy of the flowmeter can be improved by dynamically compensating the heat increased or lost in the heat exchange process of the flowmeter.
Drawings
FIG. 1 is a schematic perspective view of the present utility model;
FIG. 2 is an enlarged view of FIG. 1A in accordance with the present utility model;
FIG. 3 is a schematic view of the inner pipe connection structure of the present utility model;
Fig. 4 is a front view of the present utility model.
In the figure: 1. a flow pipe; 2. a threaded joint; 3. a patch thermometer; 4. jacking pipes; 5. a detection cavity; 6. a first temperature probe; 7. an outer tube; 8. an inner tube; 9. a detection chamber; 10. a second temperature probe; 11. a connecting rod; 12. a temperature display screen; 13. a flow meter; 14. a bolt; 15. a water inlet channel; 16. a water outlet channel; 17. a one-way valve.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
This embodiment;
Referring to fig. 1-4, in an embodiment of the present utility model, a dynamic compensation type thermal gas flowmeter includes a flow pipe 1, two ends of the flow pipe 1 are respectively connected with an external gas flowing pipe, a patch type thermometer 3 is installed on a surface of the flow pipe 1, the patch type thermometer 3 is used for measuring a gas temperature in the flow pipe 1, so as to observe an influence of temperature change on a gas flow rate, so as to quickly compensate and adjust the temperature and reduce an error, and a specific compensation mode includes that when the temperature measured by the patch type thermometer 3 is lower than an external environment temperature, it is indicated that the gas in the flow pipe 1 absorbs heat to the outside, and heat absorbed by the gas in the flow pipe 1 to the outside needs to be eliminated; otherwise, the heat released by the gas in the flow tube 1 to the outside needs to be eliminated, the patch thermometer 3 detects the temperature of the gas in the flow tube 1, the top of the flow tube 1 is connected with a first temperature detection structure through a jacking pipe 4, the first temperature detection structure comprises a detection cavity 5 and a first temperature probe 6, the first temperature probe 6 penetrates through the detection cavity 5, a temperature compensation component is arranged at the top of the first temperature detection structure, the temperature compensation component comprises an outer tube 7, an inner tube 8 is coaxially connected to the inside of the outer tube 7, a cavity formed by the outer tube 7 and the inner tube 8 is penetrated and connected with a water inlet and outlet pipeline component, a second temperature detection structure is arranged at the top of the water inlet and outlet pipeline component, the second temperature detection structure comprises a detection chamber 9, a second temperature probe 10 is arranged at the side surface of the detection chamber 9, the top of the second temperature detection structure is connected with a flow meter 13 through a bolt 14, and particularly, when the temperature measured by the patch thermometer 3 is lower than the temperature of the outside environment, the temperature is indicated to be in the flow tube 1, the temperature compensation component is required to be eliminated, and therefore, the heat absorbed by the gas in the flow tube 1 is required to be eliminated, and the heat absorbed by the outside through the low temperature probe 6, and the temperature through the low temperature channel 7 is indicated by the low temperature heat absorption mechanism, and the temperature absorption error of the temperature measurement instrument 1, and the temperature sensor 6 is in the temperature absorption error measurement standard temperature channel 1; when the gas in the flow pipe 1 releases heat to the outside, the heat released by the gas in the flow pipe 1 to the outside needs to be eliminated, and the temperature measured by the patch thermometer 3 is higher than the outside environment temperature, and the water flow with the temperature higher than the temperature measured by the patch thermometer 3 is introduced into the water inlet channel 15, so that the temperature of the gas in the flow pipe 1 can be compensated, and the measurement accuracy of the gas flow under the compensation mechanism is improved.
Preferably, the threaded joints 2 are welded at the two ends of the flow pipe 1, the flow pipe 1 is a three-way pipe, and the threaded joints 2 at the two ends of the flow pipe 1 are convenient to connect with an external air channel.
Preferably, the inner tube 8 is a hollow pipeline, the inner tube 8 comprises a side wall with a plurality of sharp corner structures, the plurality of sharp corner structures are distributed in an equidistant circumferential array, the contact area between the inner tube 8 and compensation liquid is increased, and the compensation efficiency is improved.
Preferably, the water inlet and outlet pipeline assembly comprises a water inlet channel 15 and a water outlet channel 16, a one-way valve 17 is arranged on the surface of the water outlet channel 16, and the one-way valve 17 is used for controlling the on-off of water flow in the water outlet channel 16.
Preferably, the side of the detecting chamber 9 is penetrated with a connecting rod 11, one end of the connecting rod 11 is connected with a temperature display screen 12, and the temperature display screen 12 is used for displaying temperature values detected by the patch thermometer 3, the first temperature probe 6 and the second temperature probe 10.
The working principle of the utility model is as follows: when the temperature measured by the patch thermometer 3 is lower than the external environment temperature, the gas in the runner pipe 1 absorbs heat to the outside, and the heat absorbed by the gas in the runner pipe 1 needs to be eliminated, so that the low-temperature water flow is led into the water inlet channel 15, and absorbs heat to the runner pipe 1 through the outer pipe 7, and when the measured results of the patch thermometer 3, the first temperature probe 6 and the second temperature probe 10 are within the standard error range, the compensation mechanism is effective; when the gas in the flow pipe 1 releases heat to the outside, the heat released by the gas in the flow pipe 1 to the outside needs to be eliminated, and the temperature measured by the patch thermometer 3 is higher than the outside environment temperature, and the water flow with the temperature higher than the temperature measured by the patch thermometer 3 is introduced into the water inlet channel 15, so that the temperature of the gas in the flow pipe 1 can be compensated, and the measurement accuracy of the gas flow under the compensation mechanism is improved.
The present utility model is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present utility model and the inventive concept thereof, can be replaced or changed within the scope of the present utility model.
Claims (6)
1. A dynamic compensation type thermal gas flowmeter, comprising a flow pipe (1), characterized in that: the surface mounting of runner pipe (1) has SMD thermometer (3), the gas temperature in runner pipe (1) is surveyed to SMD thermometer (3), the top of runner pipe (1) is connected with first temperature detection structure through push pipe (4), temperature compensation subassembly is installed at the top of first temperature detection structure, temperature compensation subassembly includes outer tube (7), the inside coaxial of outer tube (7) is connected with inner tube (8), the cavity through-connection that outer tube (7) and inner tube (8) formed has business turn over water piping component, second temperature detection structure is installed at the top of business turn over water piping component, the top of second temperature detection structure is connected with flowmeter (13) through bolt (14).
2. A dynamically compensated thermal gas flow meter according to claim 1, wherein: threaded joints (2) are welded at two ends of the flow pipe (1), and the flow pipe (1) is a three-way pipeline.
3. A dynamically compensated thermal gas flow meter according to claim 1, wherein: the first temperature detection structure comprises a detection cavity (5) and a first temperature probe (6), and the first temperature probe (6) penetrates through the detection cavity (5).
4. A dynamically compensated thermal gas flow meter according to claim 1, wherein: the inner pipe (8) is a hollow pipeline, the inner pipe (8) comprises a side wall with a plurality of sharp corner structures, and the plurality of sharp corner structures are distributed in an equidistant circumferential array.
5. A dynamically compensated thermal gas flow meter according to claim 1, wherein: the water inlet and outlet pipeline assembly comprises a water inlet channel (15) and a water outlet channel (16), and a one-way valve (17) is arranged on the surface of the water outlet channel (16).
6. A dynamically compensated thermal gas flow meter according to claim 1, wherein: the second temperature detection structure comprises a detection chamber (9), and the side of the detection chamber (9)
A second temperature probe (10) is arranged on the surface, a connecting rod (11) penetrates through the side surface of the detection chamber (9),
One end of the connecting rod (11) is connected with a temperature display screen (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322694955.9U CN220853730U (en) | 2023-10-08 | 2023-10-08 | Dynamic compensation type thermal type gas flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322694955.9U CN220853730U (en) | 2023-10-08 | 2023-10-08 | Dynamic compensation type thermal type gas flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220853730U true CN220853730U (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322694955.9U Active CN220853730U (en) | 2023-10-08 | 2023-10-08 | Dynamic compensation type thermal type gas flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220853730U (en) |
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2023
- 2023-10-08 CN CN202322694955.9U patent/CN220853730U/en active Active
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