CN207688957U - A kind of heat type flow quantity module - Google Patents
A kind of heat type flow quantity module Download PDFInfo
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- CN207688957U CN207688957U CN201721602166.6U CN201721602166U CN207688957U CN 207688957 U CN207688957 U CN 207688957U CN 201721602166 U CN201721602166 U CN 201721602166U CN 207688957 U CN207688957 U CN 207688957U
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- head piece
- shell
- heat type
- type flow
- flow quantity
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Abstract
The utility model provides a kind of heat type flow quantity module, belongs to gas meter, flow meter technical field.It solves the problems such as impurity in existing heat type flow quantity module is easy deposition, measuring accuracy is poor.This heat type flow quantity module includes offering air inlet and the shell of gas outlet, it is provided with metering device outside the side wall of shell, there is cavity in metering device, the upper head piece being connected with cavity and lower head piece are offered on the side wall of shell respectively, upper head piece is located at the downside of lower head piece, and cavity inside is equipped with gage probe, and gage probe is between upper head piece and lower head piece, the interior of shell is provided with baffle, and baffle is located at the top of metering device.The utility model have many advantages, such as to prevent impurity deposition, measure it is accurate.
Description
Technical field
The utility model belongs to gas meter, flow meter technical field, is related to a kind of flow module, more particularly to a kind of heat type flow quantity mould
Group.
Background technology
Heat type flow quantity module is a kind of flow sensor applied to microelectronics, is applied to be used as gas in electronic gas table
Body flow detecting element, by the temperature difference of two temperature sensors come detection flows, in zero delivery, temperature field is with low-grade fever
It is in normal distribution centered on device, the temperature detected by upper and lower two temperature sensors is equal, and gas stream is out-of-date when having, temperature
Center downstream deviate, the temperature that the temperature sensor of upstream detects is lower, what the temperature sensor in downstream detected
Detection is got higher, and thereby produces temperature difference, the size and flow of temperature difference are at certain correspondence.It is one kind not by temperature
With the flow instrument of pressure influence, application is more and more extensive, however the changed air-flow in the temperature field of sensor is caused to be side
Interlayer stream, i.e. very small air-flow, therefore hot type metering module generally uses shunting structure, makes primary air through sprue stream
Go out, boundary layer shunting enters sensor region by the flow dividing structure in metering module and carries out flow measurement.
Existing hot type digital gas meter need to meet anti-fouling performance, since heat type flow quantity module is often installed vertically on combustion
At gas meter gas outlet, the flow dividing structure in existing structure can there is a possibility that depositing contaminants, to influence split ratio, cause to count
Amount performance is unsatisfactory for standard requirement.
Utility model content
The purpose of this utility model is to be directed to the above-mentioned problems in the prior art, and providing one kind prevents impurity heavy
Product measures accurate heat type flow quantity module.
The purpose of this utility model can be realized by following technical proposal：A kind of heat type flow quantity module, which is characterized in that
Shell including offering air inlet and gas outlet is provided with metering device, metering dress outside the side wall of the shell
There is cavity in setting, offer the upper head piece being connected with cavity and lower head piece on the side wall of the shell respectively, described is upper
Head piece is located at the downside of lower head piece, and the cavity inside is equipped with gage probe, and the gage probe is positioned at upper
Between head piece and lower head piece, the interior of the shell is provided with baffle, and the baffle is located at the top of metering device.
The operation principle of the utility model：Combustion gas flows to gas outlet from air inlet, when combustion gas flows through metering device, from upstream
Mouth is flowed into cavity and is flowed out from lower head piece, the flow detection flow that gage probe passes through air-flow in cavity.This practicality is new
Top in type in metering device is provided with baffle, effectively impurity can be prevented to fall into sensing device, prevent impurity from accumulating
And influence air-flow so that the metering of flow is more accurate.
In above-mentioned heat type flow quantity module, the housing sidewall is internally provided with shunting column, and the shunting column is set
It is placed in the lower part of head piece, the shunting column, which is used to block head piece, keeps the air-flow into upper head piece steady.
In above-mentioned heat type flow quantity module, the shunting column is to gas outlet curving.
In above-mentioned heat type flow quantity module, the shell is internally provided with honeycomb mesh, the honeycomb mesh by
Lateral panel is intersected with longitudinal panel to be spliced, if enclosure interior is separated into dry gas by the lateral panel with longitudinal panel
Upper head piece and lower head piece are covered in interior by circulation road, the honeycomb mesh.
In above-mentioned heat type flow quantity module, the gas channel is parallel to the length direction of shell.
In above-mentioned heat type flow quantity module, longitudinal panel is parallel with the tangential direction of peripheral wall at upper head piece,
Longitudinal panel is mutually perpendicular to lateral panel.
In above-mentioned heat type flow quantity module, the baffle is tilted to close to gas outlet side.
In above-mentioned heat type flow quantity module, the baffle forms included angle A with housing sidewall, and the angle of included angle A is 30 °
~60 °.
In above-mentioned heat type flow quantity module, the inner end of the baffle is fixed in inner walls, the outer end of the baffle
Beyond first piece of longitudinal panel close to metering device side.
In above-mentioned heat type flow quantity module, it is d that the outer end of the baffle, which exceeds the distance of first piece of longitudinal panel, d's
Length is 0.1 millimeter~0.5 millimeter.
Compared with prior art, the utility model has the following advantages：
1, the top of metering device is provided with baffle in the utility model, effectively impurity can be prevented to fall into sensing device
Or in shunting column, prevent impurity from accumulating and influencing air-flow so that the metering of flow is more accurate.
2, the lower part of upper head piece is provided with shunting column in the utility model so that air-flow is smoothly introduced into head piece, is prevented
Only the gas flowing in shell has an impact metering device.
3, column is shunted in the utility model to gas outlet curving, air-flow can be made to flow into gentler when going up head piece, into
One step promotes the accuracy of metering.
4, the utility model middle casing is internally provided with honeycomb mesh, and honeycomb mesh makes in shell that there are certain pressure damages
It loses so that gas is shunted after entering this, to realize required split ratio.
5, gas channel is parallel with shell length direction in the utility model so that air-flow average rate flows through honeycomb mesh, makes
The metering for obtaining flow is more accurate.
6, longitudinal panel arranges ground arrangement with lateral panel in the utility model, facilitates the cross section in calculated gas flow channel
Product so that shunting is more accurate, improves the precision of flowmeter.
7, baffle is tilted to gas outlet side in the utility model, and impurity can be prevented to fall into sensing device or shunting column
In, and the impurity stopped, easy cleaning can be collected.
8, when baffle and inner walls angle are in 30 °~60 ° in the utility model, blocking, the effect for collecting impurity are good.
9, when the outer end of baffle is beyond first piece of longitudinal panel in the utility model, the blocking effect of baffle can be promoted.
10, it is 0.1 millimeter~0.5 millimeter that baffle, which exceeds first piece of longitudinal panel length, in the utility model, can be effectively
Stop impurity, the flowing of shell interior air-flow will not be influenced.
Description of the drawings
Fig. 1 is the cross-sectional view of the utility model.
Fig. 2 is the overlooking structure diagram of the utility model.
In figure, 1, air inlet；2, gas outlet；3, shell；4, metering device；5, cavity；6, upper head piece；7, lower head piece；8、
Gage probe；9, baffle；10, column is shunted；11, honeycomb mesh；12, lateral panel；13, longitudinal panel；14, gas channel.
Specific implementation mode
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1 and Figure 2, this heat type flow quantity module includes the shell 3 for offering air inlet 1 and gas outlet 2, shell 3
It is provided with metering device 4 outside side wall, there is cavity 5 in metering device 4, offered respectively and 5 phase of cavity on the side wall of shell 3
The upper head piece 6 of connection and lower head piece 7, upper head piece 6 are located at the downside of lower head piece 7, gage probe 8 are equipped with inside cavity 5, and
Gage probe 8 is between upper head piece 6 and lower head piece 7, and the interior of shell 3 is provided with baffle 9, and baffle 9 is located at metering
The top of device 4.
Further to describe in detail, 3 side wall of shell is internally provided with shunting column 10, and shunting column 10 is set to the lower part of head piece 6,
Shunting column 10, which is used to block head piece 6, keeps the air-flow into upper head piece 6 steady, shunts column 10 to 2 curving of gas outlet.
It further describes in detail, shell 3 is internally provided with honeycomb mesh 11, and honeycomb mesh 11 is by lateral panel 12 and longitudinal lattice
The intersection of plate 13 is spliced, and lateral panel 12 will be separated into several gas channels 14, screens with longitudinal panel 13 inside shell 3
In upper head piece 6 and lower head piece 7 are covered in by lattice 11, gas channel 14 is parallel to the length direction of shell 3, longitudinal panel 13 with it is upper
The tangential direction of peripheral wall is parallel at head piece 6, and longitudinal panel 13 is mutually perpendicular to lateral panel 12.
In order to promote the effect that baffle 9 stops impurity, baffle 9 is tilted to close to 2 side of gas outlet, and the inner end of baffle 9 is solid
Due on 3 inner wall of shell, the outer end of baffle 9 exceeds first piece of longitudinal panel 13 close to 4 side of metering device.
Preferably, baffle 9 forms included angle A with 3 side wall of shell, the angle of included angle A is 30 °~60 °, the outer end of baffle 9
Distance beyond first piece of longitudinal panel 13 is d, and the length of d is 0.1 millimeter~0.5 millimeter.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although be used more herein air inlet 1, gas outlet 2, shell 3, metering device 4, cavity 5, upper head piece 6, under
Head piece 7, gage probe 8, baffle 9, shunting column 10, honeycomb mesh 11, lateral panel 12, longitudinal panel 13, gas channel 14
Equal terms, but it does not preclude the possibility of using other terms.The use of these items is only for more easily describe to conciliate
Release the essence of the utility model；Being construed as any one of the additional limitations all is disagreed with the spirit of the present invention
's.
Claims (10)
1. a kind of heat type flow quantity module, which is characterized in that the shell (3) including offering air inlet (1) and gas outlet (2), institute
It states and is provided with metering device (4) outside the side wall of shell (3), there is cavity (5), the shell in the metering device (4)
(3) the upper head piece (6) being connected with cavity (5) and lower head piece (7), described upper head piece (6) position are offered on side wall respectively
Downside in lower head piece (7), the cavity (5) is internal to be equipped with gage probe (8), and the gage probe (8)
Between upper head piece (6) and lower head piece (7), the interior of the shell (3) is provided with baffle (9), the baffle (9)
Top positioned at metering device (4).
2. a kind of heat type flow quantity module according to claim 1, which is characterized in that the inside of shell (3) side wall is set
It is equipped with shunting column (10), the shunting column (10) is set to the lower part of head piece (6), and the shunting column (10) is for blocking
Upper head piece (6) keeps the air-flow into upper head piece (6) steady.
3. a kind of heat type flow quantity module according to claim 2, which is characterized in that the shunting column (10) is to gas outlet
(2) curving.
4. a kind of heat type flow quantity module according to claim 1, which is characterized in that shell (3) are internally provided with
Honeycomb mesh (11), the honeycomb mesh (11), which is intersected by lateral panel (12) with longitudinal panel (13), to be spliced, described
Lateral panel (12) several gas channels (14), the screens will be separated into inside shell (3) with longitudinal panel (13)
Upper head piece (6) and lower head piece (7) are covered in interior by lattice (11).
5. a kind of heat type flow quantity module according to claim 4, which is characterized in that the gas channel (14) is parallel to
The length direction of shell (3).
6. a kind of heat type flow quantity module according to claim 4 or 5, which is characterized in that longitudinal panel (13) with
The tangential direction of peripheral wall is parallel at upper head piece (6), and longitudinal panel (13) is mutually perpendicular to lateral panel (12).
7. a kind of heat type flow quantity module according to claim 1, which is characterized in that the baffle (9) is to close to outlet
Mouth (2) side tilts.
8. a kind of heat type flow quantity module according to claim 7, which is characterized in that the baffle (9) and shell (3) side
Wall forms included angle A, and the angle of included angle A is 30 °~60 °.
9. a kind of heat type flow quantity module according to claim 4, which is characterized in that the inner end of the baffle (9) is fixed on
On shell (3) inner wall, the outer end of the baffle (9) exceeds first piece of longitudinal panel (13) close to metering device (4) side.
10. a kind of heat type flow quantity module according to claim 9, which is characterized in that the outer end of the baffle (9) is beyond the
The distance of one piece of longitudinal panel (13) is d, and the length of d is 0.1 millimeter~0.5 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721602166.6U CN207688957U (en) | 2017-11-27 | 2017-11-27 | A kind of heat type flow quantity module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721602166.6U CN207688957U (en) | 2017-11-27 | 2017-11-27 | A kind of heat type flow quantity module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207688957U true CN207688957U (en) | 2018-08-03 |
Family
ID=62998913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721602166.6U Active CN207688957U (en) | 2017-11-27 | 2017-11-27 | A kind of heat type flow quantity module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207688957U (en) |
-
2017
- 2017-11-27 CN CN201721602166.6U patent/CN207688957U/en active Active
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