CN113899419A - Thermal gas mass flowmeter with high range ratio - Google Patents
Thermal gas mass flowmeter with high range ratio Download PDFInfo
- Publication number
- CN113899419A CN113899419A CN202111186463.8A CN202111186463A CN113899419A CN 113899419 A CN113899419 A CN 113899419A CN 202111186463 A CN202111186463 A CN 202111186463A CN 113899419 A CN113899419 A CN 113899419A
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- Prior art keywords
- arc
- gas mass
- high range
- thermal gas
- shell
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
- G01F1/86—Indirect mass flowmeters, e.g. measuring volume flow and density, temperature or pressure
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/14—Casings, e.g. of special material
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses a high-range-ratio thermal gas mass flowmeter, which comprises an end shell, wherein the front end of the end shell is provided with a measurer body, the top end of the end shell is provided with an external joint, the bottom end of the end shell is connected with a flow through pipe with openings at the left and right sides through a vertically arranged connecting pipe, a temperature measuring probe and a heating probe are arranged in the connecting pipe, the front end of the end shell is provided with a front end cover, and the rear end of the end shell is provided with a rear end cover; the front end of end shell is equipped with the protecgulum mouth, and the caliber body is located the protecgulum mouth, covers the protection casing on the caliber body between caliber body and the protecgulum mouth, and the protection casing includes a plurality of arc protection piece, and the outside of arc protection piece is equipped with two spacing draw slips along arc protection piece width direction symmetric distribution, and spacing draw slip sets up along arc protection piece length direction.
Description
Technical Field
The invention relates to the field of gas mass flowmeters, in particular to a thermal gas mass flowmeter with a high range ratio.
Background
Thermal gas mass flowmeters are instruments that measure the flow of gas using the principle of thermal diffusion. The sensor consists of two reference level thermal Resistors (RTDs). One is a velocity sensor RH and one is a temperature sensor RMG which measures the change in gas temperature. When the two RTDs are placed in the gas being measured, with sensor RH being heated, the other sensor RMG is used to sense the temperature of the gas being measured. As the gas flow rate increases, the gas flow carries more heat away and the temperature of the sensor RH drops.
When the existing thermal gas mass flow meter with a high range ratio is used, the internal electronic components of the thermal gas mass flow meter do not adopt enough effective protective measures, and after the thermal gas mass flow meter falls down due to accidents, the internal electronic components of the thermal gas mass flow meter are easily damaged, so that the service life of the thermal gas mass flow meter is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the thermal gas mass flow with the high range ratio, the meter can realize shielding protection on the measurer body through the protective cover, and meanwhile, the protective cover can be quickly detached in a splicing manner without influencing the overhaul and maintenance of the inside of the measurer body.
In order to solve the technical problems, the invention provides the following technical scheme: a high-range-ratio thermal gas mass flowmeter comprises an end shell, wherein the front end of the end shell is provided with a measurer body, the top end of the end shell is provided with an external connector, the bottom end of the end shell is connected with a flow through pipe with openings at the left and right sides transversely through a vertically arranged connecting pipe, a temperature measuring probe and a heating probe are arranged in the connecting pipe, the front end of the end shell is provided with a front end cover, and the rear end of the end shell is provided with a rear end cover;
the front end of the end shell is provided with a front cover opening, the measurer body is positioned in the front cover opening, a protective cover which is covered on the measurer body is arranged between the measurer body and the front cover opening, the protective cover comprises a plurality of arc-shaped protective sheets, two limiting sliding strips which are symmetrically distributed along the width direction of the arc-shaped protective sheets are arranged on the outer sides of the arc-shaped protective sheets, the limiting sliding strips are arranged along the length direction of the arc-shaped protective sheets, and a plurality of limiting sliding grooves which are matched with the limiting sliding strips are formed in the inner sides of the front cover opening symmetrically distributed along the width direction of the arc-shaped protective sheets;
the inner side of the arc-shaped protection sheet is provided with buffering foam fixed on the inner side of the arc-shaped protection sheet, and the buffering foam is in contact with the measurer body.
As a preferred technical scheme of the invention, a clamping strip seat positioned between two limiting sliding strips is arranged on the outer side of the arc-shaped protective sheet, two elastic clamping strips which are bilaterally symmetrical and separated oppositely are fixedly arranged at the top end of the clamping strip seat, and a plurality of connecting clamping grooves matched with the elastic clamping strips and the clamping strip seat are formed in the inner wall of the front cover opening.
As a preferred technical scheme of the invention, two handle fixing heads are symmetrically arranged on the outer side of the arc-shaped protection sheet, each handle fixing head is arranged between a limiting slide bar and a clamping bar seat at the corresponding end of the handle fixing head, and a handle with the end part fixed on the handle fixing head is arranged on the outer side of the arc-shaped protection sheet.
As a preferred technical scheme of the invention, the handle is attached to the outer side of the arc-shaped protection sheet and is made of flexible materials.
As a preferable technical solution of the present invention, the measurer body includes a circuit board and an operation panel, the circuit board is disposed in the front cover opening, and the operation panel is disposed at a front end of the circuit board.
As a preferable technical solution of the present invention, a display screen is disposed at a front end of the operation panel, and an operation button located on the operation panel is disposed below the display screen.
As a preferable technical scheme of the invention, the rear end of the end shell is provided with a rear cover opening, the front end cover is clamped on the front cover opening, and the rear end cover is clamped on the rear cover opening.
As a preferred technical scheme of the invention, a plurality of circumferentially distributed clamping notches are symmetrically formed in the front end and the rear end of the end shell, a plurality of circumferentially distributed first elastic buckles are respectively arranged on the end openings of the front end cover and the rear end cover, the first elastic buckles are matched with the clamping notches, a second elastic buckle is arranged at the free end of the first elastic buckle, and the second elastic buckle is clamped and arranged on the outer wall of the end shell connected with the clamping notches.
In a preferred embodiment of the present invention, the front end of the front end cover is provided with a cover glass that covers the front end of the measuring instrument body.
As a preferred technical scheme of the invention, two ends of the flow through pipe are provided with flanges for mounting the gas mass flowmeter.
Compared with the prior art, the invention can achieve the following beneficial effects:
1. the protective cover is arranged between the measurer body and the front cover opening and covers the measurer body, the protective cover is formed by splicing a plurality of arc-shaped protective sheets, two symmetrically-arranged limiting sliding strips are arranged on the outer sides of the arc-shaped protective sheets, and connecting clamping grooves matched with the limiting sliding strips are arranged on the inner side of the front cover opening, so that the measurer body can be shielded and protected through the protective cover;
2. the clamping strip seat fixed on the outer side of the arc-shaped protective sheet is arranged between the two limiting sliding strips, the two elastic clamping strips are fixed at the top end of the clamping strip seat and clamped into the connecting clamping groove by utilizing the elastic force of the elastic clamping strips which are separated from each other, so that the firmness of the arc-shaped protective sheet on the front cover opening is improved;
3. the clamping groove openings distributed in a plurality of circumferential arrays are formed in the two ends of the end shell, the end openings of the front end cover and the rear end cover are provided with a plurality of circumferential arrays and are matched with the first elastic buckles of the clamping groove openings, the quick installation of the front end cover and the rear end cover on the end shell is achieved through the matching of the first elastic buckles of the accessible and the clamping groove openings, meanwhile, the second elastic buckles are arranged at the tail ends of the first elastic buckles, and the firmness of clamping connection on the end shell is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an exploded schematic view of the present invention;
FIG. 3 is a perspective front view of the present invention;
FIG. 4 is a perspective view of the measuring device body of the present invention;
FIG. 5 is an enlarged view of FIG. 1 at position A in accordance with the present invention;
FIG. 6 is an enlarged view of FIG. 4 at position B of the present invention;
FIG. 7 is a schematic structural view of an arc-shaped protection sheet according to the present invention.
Wherein: 1. a rear end cap; 2. a notch; 3. a connecting pipe; 4. a front end cover; 5. protective glass; 6. a flow through pipe; 7. a flange plate; 8. an outer joint; 9. an end shell; 10. a measurer body; 11. a protective cover; 12. a front cover opening; 13. a rear cover opening; 14. a first elastic buckle; 15. a second elastic buckle; 16. a connecting clamping groove; 17. a limiting chute; 18. a circuit board; 19. an operation panel; 20. an arc-shaped protection sheet; 21. buffering foam; 22. an elastic clamping strip; 23. a flexible handle; 24. a card strip seat; 25. a handle fixing head; 26. a limiting slide bar; 27. a display screen; 28. the button is operated.
Detailed Description
The present invention will be further described with reference to specific embodiments for the purpose of facilitating an understanding of technical means, characteristics of creation, objectives and functions realized by the present invention, but the following embodiments are only preferred embodiments of the present invention, and are not intended to be exhaustive. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention. The experimental methods in the following examples are conventional methods unless otherwise specified, and materials, reagents and the like used in the following examples are commercially available unless otherwise specified.
Example (b):
as shown in fig. 1-7, the invention provides a high range ratio thermal gas mass flowmeter, which comprises an end shell 9, wherein the front end of the end shell 9 is provided with a measurer body 10, the top end of the end shell 9 is provided with an external joint 8, the bottom end of the end shell 9 is connected with a flow through pipe 6 which is horizontally provided with two open ends at left and right through a vertically arranged connecting pipe 3, a temperature measuring probe and a heating probe are arranged in the connecting pipe 3, the front end of the end shell 9 is provided with a front end cover 4, and the rear end of the end shell 9 is provided with a rear end cover 1;
the front end of the end shell 9 is provided with a front cover opening 12, the measurer body 10 is positioned in the front cover opening 12, a protective cover 11 covering the measurer body 10 is arranged between the measurer body 10 and the front cover opening 12, the protective cover 11 comprises a plurality of arc-shaped protective sheets 20, two limiting sliding strips 26 symmetrically distributed along the width direction of the arc-shaped protective sheets 20 are arranged on the outer sides of the arc-shaped protective sheets 20, the limiting sliding strips 26 are arranged along the length direction of the arc-shaped protective sheets 20, and a plurality of limiting sliding grooves 17 matched with the limiting sliding strips 26 are formed in the inner sides of the two symmetrical front cover openings 12 along the width direction of the arc-shaped protective sheets 20;
the inner side of the arc-shaped protection sheet 20 is provided with buffer foam 21 fixed on the inner side of the arc-shaped protection sheet 20, and the buffer foam 21 is in contact with the measurer body 10;
when using this hot type gas mass flow meter of high range ratio, through set up the protection casing 11 that covers on caliber body 10 between caliber body 10 and protecgulum mouth 12, set up protection casing 11 to form for the concatenation of a plurality of arc protection piece 20, set up the spacing draw runner 26 that two symmetries set up in the outside of arc protection piece 20 simultaneously, inboard setting and spacing draw runner 26 assorted connecting slot 16 at protecgulum mouth 12, thereby accessible protection casing 11 realizes sheltering from the protection to caliber body 10, protection casing 11 adopts the concatenation formula to pull down fast simultaneously, do not influence the maintenance to caliber body 10 inside, simultaneously through setting up buffering bubble cotton 21 in the inboard of protection casing 11, increase the buffering protective effect of protection casing 11 to caliber body 10.
In this embodiment, a strip clamping seat 24 located between two limiting sliding strips 26 is arranged on the outer side of the arc-shaped protection sheet 20, two elastic clamping strips 22 which are bilaterally symmetrical and separated in opposite directions are fixedly arranged at the top end of the strip clamping seat 24, and a plurality of connecting clamping grooves 16 matched with the elastic clamping strips 22 and the strip clamping seat 24 are formed in the inner wall of the front cover opening 12;
through set up the card strip seat 24 of fixing in the arc protection piece 20 outside between two spacing draw runner 26, fix two elasticity card strips 22 on the top of card strip seat 24, utilize the elastic force of elasticity card strip 22 alternate segregation to go into it in connecting slot 16 to the fastness of installing on front cover mouth 12 of arc protection piece 20 has been increased.
In this embodiment, two handle fixing heads 25 are symmetrically disposed on the outer side of the arc protection sheet 20, each handle fixing head 25 is disposed between the limiting slide bar 26 and the strip clamping seat 24 at the corresponding end, and the outer side of the arc protection sheet 20 is provided with a handle 23 whose end is fixed on the handle fixing head 25;
by providing the handle fixing head 25 on the outer side of the arc-shaped protection piece 20 and providing the grip 23 on the handle fixing head 25, the protective cover 11 can be easily lifted and placed by the grip 23 when the protective cover 11 is detached.
In this embodiment, the handle 23 is attached to the outer side of the arc protection sheet 20, and the handle 23 is made of a flexible material;
by using the flexible material to prepare the handle 23, when the handle 23 is attached to the arc-shaped protection sheet 20, the installation of the front end cover 4 is not affected, and the use effect of the handle 23 is not affected.
In the present embodiment, the measurer body 10 includes a circuit board 18 and an operation panel 19, the circuit board 18 is disposed in the front cover opening 12, and the operation panel 19 is disposed at the front end of the circuit board 18.
In the present embodiment, a display 27 is provided at the front end of the operation panel 19, and an operation button 28 located on the operation panel 19 is provided below the display 27;
the operating state of the gas mass flowmeter can thus be displayed via the display screen 27, and the operating parameters of the gas mass flowmeter can be changed by operating the buttons 28.
In the embodiment, the rear end of the end shell 9 is provided with a rear cover opening 13, the front end cover 4 is arranged on the front cover opening 12 in a clamping manner, and the rear end cover 1 is arranged on the rear cover opening 13 in a clamping manner;
thereby realizing the clamping installation of the front end cover 4 and the rear end cover 1 on the end shell 9.
In this embodiment, the front end and the rear end of the end shell 9 are symmetrically provided with a plurality of circumferentially arrayed slot openings 2, the front end cover 4 and the rear end cover 1 are provided with a plurality of circumferentially arrayed first elastic buckles 14, the first elastic buckles 14 are matched with the slot openings 2, the free ends of the first elastic buckles 14 are provided with second elastic buckles 15, and the second elastic buckles 15 are clamped and arranged on the outer wall of the end shell 9 connected with the slot openings 2;
draw-in groove mouth 2 through seting up a plurality of circumference array distributions at the both ends of end shell 9 to set up a plurality of circumference arrays on the port of front end housing 4 and rear end cap 1 and with the first elastic buckle 14 of draw-in groove mouth 2 assorted, thereby the cooperation of the first elastic buckle 14 of accessible and draw-in groove mouth 2, realize the quick installation of front end housing 4 and rear end cap 1 on end shell 9, set up second elastic buckle 15 through the end at first elastic buckle 14 simultaneously, increase the fastness of joint on end shell 9.
In this embodiment, the front end of the front end cover 4 is provided with a cover glass 5 covering the front end of the measurer body 10;
the protection of the measurer body 10 is realized by providing the cover glass 5 at the front end of the front end cover 4.
In the embodiment, two ends of the flow through pipe 6 are provided with flanges 7 for mounting the gas mass flowmeter;
through setting up ring flange 7, can realize this hot type gas mass flow meter quick installation on the pipeline interface.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A high range ratio thermal gas mass flowmeter comprising an end housing (9), characterized in that: a measurer body (10) is arranged at the front end of the end shell (9), an outer joint (8) is arranged at the top end of the end shell (9), the bottom end of the end shell (9) is connected with a flow through pipe (6) which is vertically arranged and is transversely provided with two open ends at the left and right through a connecting pipe (3), a temperature measuring probe and a heating probe are arranged in the connecting pipe (3), a front end cover (4) is arranged at the front end of the end shell (9), and a rear end cover (1) is arranged at the rear end of the end shell (9);
the front end of the end shell (9) is provided with a front cover opening (12), the measurer body (10) is positioned in the front cover opening (12), a protective cover (11) which covers the measurer body (10) between the measurer body (10) and the front cover opening (12) comprises a plurality of arc-shaped protective sheets (20), two limiting sliding strips (26) which are symmetrically distributed along the width direction of the arc-shaped protective sheets (20) are arranged on the outer sides of the arc-shaped protective sheets (20), the limiting sliding strips (26) are arranged along the length direction of the arc-shaped protective sheets (20), and a plurality of limiting sliding grooves (17) which are matched with the limiting sliding strips (26) are formed in the inner sides of the front cover opening (12) which are symmetrical along the width direction of the arc-shaped protective sheets (20);
the inner side of the arc-shaped protection sheet (20) is provided with buffer foam (21) fixed on the inner side of the arc-shaped protection sheet (20), and the buffer foam (21) is in contact with the measurer body (10).
2. The high range ratio thermal gas mass flow meter of claim 1, wherein: the outside of arc protection piece (20) is equipped with card strip seat (24) that are located between two spacing draw runner (26), the top of card strip seat (24) is fixed and is equipped with two bilateral symmetry and elasticity card strip (22) of separation in opposite directions, seted up on the inner wall of protecgulum mouth (12) a plurality of and elasticity card strip (22) and card strip seat (24) assorted connecting groove (16).
3. The high range ratio thermal gas mass flow meter of claim 2, wherein: the outside symmetry of arc protection piece (20) is equipped with two handle fixed heads (25), every handle fixed head (25) all set up between spacing draw runner (26) and card strip seat (24) of its corresponding end, and the outside of arc protection piece (20) is equipped with handle (23) of end fixing on handle fixed head (25).
4. The high range ratio thermal gas mass flow meter of claim 3, wherein: the handle (23) is attached to the outer side of the arc-shaped protection sheet (20), and the handle (23) is made of flexible materials.
5. The high range ratio thermal gas mass flow meter of claim 1, wherein: the measurer body (10) comprises a circuit board (18) and an operation panel (19), wherein the circuit board (18) is arranged in the front cover opening (12), and the operation panel (19) is arranged at the front end of the circuit board (18).
6. The high range ratio thermal gas mass flow meter of claim 5, wherein: the front end of the operation panel (19) is provided with a display screen (27), and an operation button (28) positioned on the operation panel (19) is arranged below the display screen (27).
7. The high range ratio thermal gas mass flow meter of claim 1, wherein: the rear end of end shell (9) is equipped with back flap (13), front end housing (4) joint sets up on front flap (12), back end housing (1) joint sets up on back flap (13).
8. The high range ratio thermal gas mass flow meter of claim 7, wherein: the front end and the rear end of the end shell (9) are symmetrically provided with a plurality of clamping notches (2) distributed in a circumferential array mode, the ports of the front end cover (4) and the rear end cover (1) are provided with first elastic buckles (14) distributed in a plurality of circumferential arrays, the first elastic buckles (14) are matched with the clamping notches (2), the free ends of the first elastic buckles (14) are provided with second elastic buckles (15), and the second elastic buckles (15) are clamped and connected on the outer wall of the end shell (9) connected with the clamping notches (2).
9. The high range ratio thermal gas mass flow meter of claim 1, wherein: the front end of the front end cover (4) is provided with a protective glass (5) which covers the front end of the measurer body (10).
10. The high range ratio thermal gas mass flow meter of claim 1, wherein: and two ends of the flow through pipe (6) are provided with flange plates (7) for mounting the gas mass flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111186463.8A CN113899419A (en) | 2021-10-12 | 2021-10-12 | Thermal gas mass flowmeter with high range ratio |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111186463.8A CN113899419A (en) | 2021-10-12 | 2021-10-12 | Thermal gas mass flowmeter with high range ratio |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113899419A true CN113899419A (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111186463.8A Pending CN113899419A (en) | 2021-10-12 | 2021-10-12 | Thermal gas mass flowmeter with high range ratio |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113899419A (en) |
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| CN111478253A (en) * | 2020-04-14 | 2020-07-31 | 江苏天安智联科技股份有限公司 | High-safety protective device for vehicle-mounted audio surround circuit and using method |
| CN211527514U (en) * | 2020-04-21 | 2020-09-18 | 中车石家庄车辆有限公司 | Thermal gas mass flow meter |
| CN211978014U (en) * | 2020-03-21 | 2020-11-20 | 江苏中仪仪表集团有限公司 | Thermal gas mass flow meter convenient to install and connect |
| CN112112103A (en) * | 2020-10-15 | 2020-12-22 | 浙江金飞龙工贸有限公司 | Electric pole protection warning device |
| CN213579523U (en) * | 2020-12-23 | 2021-06-29 | 开封华邦仪表有限公司 | Explosion-proof type integration vortex flowmeter |
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2021
- 2021-10-12 CN CN202111186463.8A patent/CN113899419A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102396425A (en) * | 2010-09-07 | 2012-04-04 | 康莉 | Elastic clamping strip |
| CN106760583A (en) * | 2017-01-19 | 2017-05-31 | 黄河科技学院 | A kind of high-building construction multifunctional safety protection device |
| CN107425301A (en) * | 2017-07-22 | 2017-12-01 | 福建南新电缆有限公司 | A kind of spliced cable |
| CN207635063U (en) * | 2017-12-24 | 2018-07-20 | 金溪县琅琚镇礼义行藕丝糖专业合作社 | A kind of illuminating protective device of workshop |
| CN108725347A (en) * | 2018-08-28 | 2018-11-02 | 徐州市永拓机械科技有限公司 | A kind of multi-thread beam separated time and bus cable device |
| CN211978014U (en) * | 2020-03-21 | 2020-11-20 | 江苏中仪仪表集团有限公司 | Thermal gas mass flow meter convenient to install and connect |
| CN111478253A (en) * | 2020-04-14 | 2020-07-31 | 江苏天安智联科技股份有限公司 | High-safety protective device for vehicle-mounted audio surround circuit and using method |
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| CN213579523U (en) * | 2020-12-23 | 2021-06-29 | 开封华邦仪表有限公司 | Explosion-proof type integration vortex flowmeter |
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