CN202915971U - Flow channel structure of air flow meter for measuring pulsing air flow - Google Patents
Flow channel structure of air flow meter for measuring pulsing air flow Download PDFInfo
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- CN202915971U CN202915971U CN 201220674420 CN201220674420U CN202915971U CN 202915971 U CN202915971 U CN 202915971U CN 201220674420 CN201220674420 CN 201220674420 CN 201220674420 U CN201220674420 U CN 201220674420U CN 202915971 U CN202915971 U CN 202915971U
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- air flow
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- flow
- outlet pipe
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Abstract
The utility model belongs to the field of fluid flow detection devices and particularly relates to a flow channel structure of an air flow meter for measuring pulsing air flow. The flow channel structure of the air flow meter for measuring the pulsing air flow comprises an air flow meter body, wherein an air inlet pipe and an air outlet pipe which are communicated with each other are arranged on the air flow meter body and are arranged in an L-shaped manner. By adopting an L-shaped flow channel, measuring errors and numerical value fluctuation generated by the pulsing air flow are overcome, so that the measuring precision of the air flow meter is improved.
Description
Technical field
The utility model belongs to fluid flow pick-up unit field, relates in particular to a kind of flow passage structure of measuring the air flowmeter of pulse pneumatic.
Background technology
At present, the runner of known gas meter air-flow is straight, is exactly that gas is led directly to outlet by entrance.If air-flow is pulsed, because of the compressibility of gas, a small amount of periodic short-range inverted draft will be produced.If short-range inverted draft just is created in the flowmeter sensor position, will cause the duplicate measurements of sensor, additionally increased the flow of flowmeter, make the flow measurement numerical quantity higher.And there is randomness in the inverted draft that pulsation produces, also occurs the fluctuation of randomness when causing the flow measurement numerical quantity higher.
The utility model content
The utility model provides a kind of flow passage structure that can overcome the air flowmeter with L-type special flow passage of measuring error that pulse pneumatic produces and numerical fluctuations.
In order to realize the foregoing invention purpose, the utility model has adopted following technological means: a kind of flow passage structure of measuring the air flowmeter of pulse pneumatic, comprise the air flowmeter body, the air flowmeter body is provided with admission line and the outlet pipe that is connected, and admission line and outlet pipe are L-type and distribute.
As preferred version: described outlet pipe inner wide and outer narrow, and outlet pipe exit bore is less than the bore of admission line.
As preferred version: the connectivity part of described admission line and outlet pipe is provided with the transition inclined-plane.
As preferred version: described admission line porch is provided with flanging.
The beneficial effects of the utility model are: because runner is L-type, air-flow is to turn 90 degrees from the below to flow out, and the outer inverted draft of runner is blocked on the rear wall, and the flow through inverted draft of sensor probe of establishment has improved the measuring accuracy of sensor.Because runner entrance opening is larger, export less, air-flow is clamp-oned from large entrance, therefore import has a little malleation, and outlet the place ahead warp architecture can be outside runner under the effect of air-flow, produces a little negative pressure in the exit, because Venturi effect, air-flow in the runner is made into unidirectional smooth air, thereby has improved the numerical fluctuations of measuring, and has further improved the measuring accuracy of air flowmeter.
Description of drawings
Fig. 1 is the structural representation of the flow passage structure of a kind of air flowmeter of measuring pulse pneumatic of the present utility model.
Fig. 2 is that gas flow is through the schematic diagram of runner.
Embodiment
Below in conjunction with accompanying drawing, the preferred implementation of the flow passage structure of a kind of air flowmeter of measuring pulse pneumatic of the utility model is made detailed description:
According to Fig. 1, shown in Figure 2, a kind of flow passage structure of measuring the air flowmeter of pulse pneumatic comprises the air flowmeter body, and the air flowmeter body is provided with admission line 1 and the outlet pipe 2 that is connected, and admission line 1 is L-type with outlet pipe 2 and distributes.The connectivity part of described admission line 1 and outlet pipe 2 is provided with transition inclined-plane 3, and transition inclined-plane 3 is identical with outlet pipe 2 angulations with admission line 1, is more conducive to flow out from outlet pipe 2 after gas flow smooth is rotated 90 °.Described admission line 1 porch is provided with flanging, described outlet pipe 2 inner wide and outer narrows, and the bore of the relative aperture admission line 1 in outlet pipe 2 exits is little.Mouthful advance by large, osculum goes out, and establishes the such structure of corner the air-flow in the runner is made into unidirectional smooth air, thereby improves measuring accuracy.
During work, sensor places admission line 1, and air-flow enters from air intake opening, turns 90 ° towards outlet pipe 2 outflows at 3 places, transition inclined-plane behind the sensor in the admission line 1 of flowing through.The turnup structure of admission line 1 porch, can be under the effect of runner outer gas stream, form a little negative pressure in the exit of outlet pipe 2, air-flow in the runner there is one toward the suction of gas outlet direction, therefore the adverse current of pulsation generation is difficult to oppositely enter runner, also have the part adverse current after wall is hit in the position of rear wall 4, to turn around to continue to move ahead with air flow, so the adverse current of sensing station has obtained good inhibition.So runner provides the stable environment that flows to air-flow, sensor is collecting true and reliable data in the air-flow stably, thus the flowmeter output signal just more accurately, more stable.
Claims (4)
1. flow passage structure of measuring the air flowmeter of pulse pneumatic, comprise the air flowmeter body, it is characterized in that: the air flowmeter body is provided with admission line (1) and the outlet pipe (2) that is connected, and admission line (1) is L-type with outlet pipe (2) and distributes.
2. a kind of flow passage structure of measuring the air flowmeter of pulse pneumatic according to claim 1 is characterized in that: described outlet pipe (2) inner wide and outer narrow, and outlet pipe (2) exit bore is less than the bore of admission line (1).
3. a kind of flow passage structure of measuring the air flowmeter of pulse pneumatic according to claim 1, it is characterized in that: the connectivity part of described admission line (1) and outlet pipe (2) is provided with transition inclined-plane (3).
4. a kind of flow passage structure of measuring the air flowmeter of pulse pneumatic according to claim 1, it is characterized in that: described admission line (1) porch is provided with flanging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674420 CN202915971U (en) | 2012-12-10 | 2012-12-10 | Flow channel structure of air flow meter for measuring pulsing air flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220674420 CN202915971U (en) | 2012-12-10 | 2012-12-10 | Flow channel structure of air flow meter for measuring pulsing air flow |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202915971U true CN202915971U (en) | 2013-05-01 |
Family
ID=48164277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220674420 Expired - Lifetime CN202915971U (en) | 2012-12-10 | 2012-12-10 | Flow channel structure of air flow meter for measuring pulsing air flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202915971U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110681015A (en) * | 2019-11-22 | 2020-01-14 | 湖南万脉医疗科技有限公司 | Breathing machine sampling structure |
-
2012
- 2012-12-10 CN CN 201220674420 patent/CN202915971U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110681015A (en) * | 2019-11-22 | 2020-01-14 | 湖南万脉医疗科技有限公司 | Breathing machine sampling structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130501 |