CN210128740U

CN210128740U - Thermal type flow sensor

Info

Publication number: CN210128740U
Application number: CN201920978042.0U
Authority: CN
Inventors: 邬文秀
Original assignee: Shenzhen Meisi Xianrui Electronic Co Ltd
Current assignee: Shenzhen Meisi Xianrui Electronic Co Ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-03-06
Anticipated expiration: 2029-06-27

Abstract

The utility model discloses a hot type flow sensor, including the instrument body, the lower extreme of instrument body is provided with the connecting cylinder, the inboard of hiding the shell is provided with the protective housing, the inboard surface of hiding the shell is provided with the spacing groove, the surface of protective housing is provided with spacing lug, be provided with the elastic block between spacing lug and the protective housing, the surface of instrument body is provided with the connecting rod, the one end of connecting rod is provided with the loop bar, the lower extreme of loop bar is provided with the telescopic link, the upper end of telescopic link is provided with spacing kicking block, the lower extreme of loop bar is provided with spacing edge along the edge, the lower extreme of telescopic link is provided with the spacing piece of elasticity. The utility model relates to a hot type flow sensor possesses better protection effect to detecting the head, detects the head and damages when avoiding the transport, possesses the effect that helps to keep firm.

Description

Thermal type flow sensor

Technical Field

The utility model relates to a flow sensor field, in particular to hot type flow sensor.

Background

The thermal flow sensor adopts a thermal diffusion principle, the thermal diffusion technology is a technology with excellent performance and high reliability under severe conditions, when two temperature sensors are arranged in a medium, one of the temperature sensors is heated to a temperature above the ambient temperature, the other temperature sensor is used for sensing the temperature of the medium, the flow velocity of the medium is increased, the heat taken away by the medium is increased, the temperature difference of the two temperature sensors changes along with the change of the flow velocity of the medium, and the flow of the fluid can be obtained according to the proportional relation between the temperature difference and the flow velocity of the medium; the existing thermal type flow sensor does not have a protection effect on a detection head, is easy to damage during carrying, is installed on the surface of a pipeline, and is not easy to keep stable due to high height, and therefore the thermal type flow sensor is provided.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a thermal flow sensor, which can effectively solve the problems of the prior art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a hot type flow sensor, includes the instrument body, the lower extreme of instrument body is provided with the connecting cylinder, the inboard of hiding the shell is provided with the protective housing, the inboard surface of hiding the shell is provided with the spacing groove, the surface of protective housing is provided with spacing lug, be provided with the elastic block between spacing lug and the protective housing, the surface of instrument body is provided with the connecting rod, the one end of connecting rod is provided with the loop bar, the lower extreme of loop bar is provided with the telescopic link, the upper end of telescopic link is provided with spacing kicking block, the lower extreme of loop bar is provided with spacing edge along the edge, the lower extreme of telescopic link is provided with the spacing piece of elasticity.

Preferably, the upper end surface of instrument body is provided with the observation window, the observation window inlays in the upper end surface of instrument body, be fixed connection between observation window and the instrument body, the observation window is the transparent glass material.

Preferably, the connecting cylinder is extremely for fixed connection with the instrument body, the inboard of connecting cylinder is close to the lower extreme and is provided with the detection head, detect head and connecting cylinder extremely for fixed connection, set up interconnecting link between detection head and the instrument body, the instrument body with detect the head to through interconnecting link electric connection.

Preferably, hide the shell and be the upper end and seal the open cylindric casing in lower extreme, hide and be fixed connection between the upper end of shell and the surface of connecting cylinder, the protective housing inlays in the inboard of hiding the shell, protective housing and hide and be swing joint between the shell.

Preferably, the limiting lugs are embedded in the outer surface of the protective shell, the number of the limiting lugs is two, the elastic blocks are fixedly connected with the protective shell and the limiting lugs, the number of the limiting grooves is four, and the height of the outer portion of the protective shell is larger than the distance between the upper limiting groove and the lower limiting groove.

Preferably, be fixed connection between connecting rod and instrument body and the loop bar, the inboard cavity of loop bar, and the upper end of telescopic link inlays in the inboard of loop bar, be fixed connection between spacing kicking block and the telescopic link, be swing joint between spacing kicking block and the loop bar, be fixed connection between spacing piece of elasticity and the telescopic link.

Compared with the prior art, the utility model discloses following beneficial effect has: the thermal flow sensor is provided with the protective shell and the hidden shell, the limiting lug is embedded in the inner side of the limiting groove to ensure the stability of the position of the protective shell, the protective shell cannot naturally slide up and down along the inner side of the hidden shell, when certain external force is applied to make the limiting lug break away from the inner side of the limiting groove, the elastic block is extruded by the limiting lug at the same time, the protective shell is continuously pushed upwards, the limiting lug moves to the inner side of the limiting groove close to the upper end, under the elastic action of the elastic block, the limiting lug is embedded in the inner side of the limiting groove, at the moment, the periphery of the detection head is exposed to the outside to facilitate the use of detection flow, the thermal flow sensor has better protection effect on the detection head, the detection head is prevented from being damaged during transportation, through the arrangement of the telescopic rod and the elastic limiting piece, after the position close to the lower end of the, until making spacing piece of elasticity card in the surface of pipeline, because the elasticity of the spacing piece of elasticity is better, the pipeline of the radial variation in size of adaptation that can be comparatively nimble to a certain extent to this plays better firm effect to whole sensor, possesses the effect that helps to keep firm, and the effect that whole hot type flow sensor used is better for traditional mode.

Drawings

Fig. 1 is a schematic view of the overall structure of a thermal flow sensor according to the present invention;

fig. 2 is a cross-sectional view of a thermal flow sensor according to the present invention at a position where the thermal flow sensor is hidden in a housing;

fig. 3 is an enlarged view of a in fig. 2 of a thermal flow sensor according to the present invention;

fig. 4 is a cross-sectional view of the joint between the telescopic rod and the loop bar of the thermal flow sensor of the present invention.

In the figure: 1. a meter body; 2. an observation window; 3. a connecting cylinder; 4. hiding the shell; 5. a protective shell; 6. a limiting groove; 7. a limiting bump; 8. an elastic block; 9. a detection head; 10. connecting a line; 11. a connecting rod; 12. a loop bar; 13. a telescopic rod; 14. a limiting top block; 15. a limiting edge; 16. an elastic limiting sheet.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-4, a thermal flow sensor, including instrument body 1, the lower extreme of instrument body 1 is provided with connecting cylinder 3, the inboard of hiding shell 4 is provided with protective housing 5, the inboard surface of hiding shell 4 is provided with spacing groove 6, the surface of protective housing 5 is provided with spacing lug 7, be provided with elastic block 8 between spacing lug 7 and the protective housing 5, the surface of instrument body 1 is provided with connecting rod 11, the one end of connecting rod 11 is provided with loop bar 12, the lower extreme of loop bar 12 is provided with telescopic link 13, the upper end of telescopic link 13 is provided with spacing kicking block 14, the lower extreme of loop bar 12 is provided with spacing edge 15 along the edge, the lower extreme of telescopic link 13 is provided with spacing piece 16 of elasticity.

The outer surface of the upper end of the instrument body 1 is provided with an observation window 2 so that a user can observe readings conveniently, the observation window 2 is embedded in the outer surface of the upper end of the instrument body 1, the observation window 2 is fixedly connected with the instrument body 1, and the observation window 2 is made of transparent glass so as to ensure that observation can be conducted; the connecting cylinder 3 is fixedly connected with the instrument body 1, the stability of the connecting cylinder 3 is ensured, a detection head 9 is arranged on the inner side of the connecting cylinder 3 close to the lower end to play a role in detecting flow, the detection head 9 is fixedly connected with the connecting cylinder 3, a connecting circuit 10 is arranged between the detection head 9 and the instrument body 1, the instrument body 1 is electrically connected with the detection head 9 through the connecting circuit 10, and the model of the detection head 9 is 20D-5; the hidden shell 4 is a cylindrical shell with the upper end closed and the lower end opened, the upper end of the hidden shell 4 is fixedly connected with the outer surface of the connecting cylinder 3 so as to ensure the stability of the hidden shell 4, the protective shell 5 is embedded in the inner side of the hidden shell 4, the protective shell 5 is movably connected with the hidden shell 4 so as to ensure that the protective shell 5 can move in the inner side of the hidden shell 4; the limiting lugs 7 are embedded in the outer surface of the protective shell 5, the number of the limiting lugs 7 is two, so that the two sides of the protective shell 5 can be kept stable, the elastic blocks 8 are fixedly connected with the protective shell 5 and the limiting lugs 7, the number of the limiting grooves 6 is four, the height of the part, located outside the hidden shell 4, of the protective shell 5 is larger than the distance between the upper limiting groove 6 and the lower limiting groove 6, and the protective shell 5 is prevented from being difficult to pull out after being completely embedded in the inner side of the hidden shell 4; be fixed connection between connecting rod 11 and instrument body 1 and loop bar 12, ensure the firm of loop bar 12, the inboard cavity of loop bar 12, and inlay in the inboard of loop bar 12 the upper end of telescopic link 13, be fixed connection between spacing kicking block 14 and the telescopic link 13, spacing kicking block 14 prevents that the upper end of telescopic link 13 from breaking away from the inboard of loop bar 12, be swing joint between spacing kicking block 14 and the loop bar 12, be fixed connection between spacing piece of elasticity 16 and the telescopic link 13, ensure the firm of spacing piece of elasticity 16, spacing 16 optional stainless steel of piece of elasticity.

It should be noted that, the present invention is a thermal type flow sensor, when in use, the protection shell 5 has a better protection effect on the detection head 9 during transportation, the detection head 9 is prevented from being damaged during transportation, the limit bump 7 is embedded in the inner side of the limit groove 6 to ensure the stability of the protection shell 5, and will not naturally slide up and down along the inner side of the hidden shell 4, the user applies a certain external force to make the limit bump 7 separate from the inner side of the limit groove 6, meanwhile, the elastic block 8 is squeezed by the limit bump 7, the user continues to push the protection shell 5 upwards, so that the limit bump 7 moves to the inner side of the limit groove 6 near the upper end, under the elastic action of the elastic block 8, the limit bump 7 is embedded in the inner side of the limit groove 6, at this time, the periphery of the detection head 9 will be exposed to the outside, so as to use the detection flow, after the user inserts the lower end of the, through twitching the upper end of telescopic link 13 from top to bottom along the inboard of loop bar 12, until making spacing piece 16 of elasticity block in the surface of pipeline, because the elasticity of the spacing piece 16 of elasticity is better, can be to a certain extent more nimble adapt to the pipeline of radial variation in size to this plays better firm effect to whole sensor, possesses the effect that helps to keep firm.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A thermal flow sensor, comprising a meter body (1), characterized in that: the lower extreme of instrument body (1) is provided with connecting cylinder (3), the inboard of hiding shell (4) is provided with protective housing (5), the inboard surface of hiding shell (4) is provided with spacing groove (6), the surface of protective housing (5) is provided with spacing lug (7), be provided with elastic block (8) between spacing lug (7) and protective housing (5), the surface of instrument body (1) is provided with connecting rod (11), the one end of connecting rod (11) is provided with loop bar (12), the lower extreme of loop bar (12) is provided with telescopic link (13), the upper end of telescopic link (13) is provided with spacing kicking block (14), the lower extreme of loop bar (12) is provided with spacing edge (15) along the edge, the lower extreme of telescopic link (13) is provided with elasticity spacing piece (16).

2. The thermal flow sensor of claim 1, wherein: the utility model discloses an instrument, including instrument body (1), observation window (2), fixed connection is between observation window (2) and instrument body (1), the upper end surface of instrument body (1) is provided with observation window (2), observation window (2) inlay in the upper end surface of instrument body (1), observation window (2) are the transparent glass material.

3. The thermal flow sensor of claim 1, wherein: connecting cylinder (3) and instrument body (1) are to being fixed connection, the inboard of connecting cylinder (3) is close to the lower extreme and is provided with detection head (9), detect head (9) and connecting cylinder (3) to being fixed connection, set up interconnecting link (10) between detection head (9) and instrument body (1), instrument body (1) and detection head (9) are to passing through interconnecting link (10) electric connection.

4. The thermal flow sensor of claim 1, wherein: hide shell (4) and be the upper end and seal the open cylindric casing of lower extreme, hide and be fixed connection between the upper end of shell (4) and the surface of connecting cylinder (3), protective housing (5) inlay in the inboard of hiding shell (4), protective housing (5) and hide and be swing joint between shell (4).

5. The thermal flow sensor of claim 1, wherein: spacing lug (7) inlay in the surface of protective housing (5), the quantity of spacing lug (7) is two sets of, be fixed connection between elasticity piece (8) and protective housing (5) and spacing lug (7), the quantity of spacing groove (6) is four groups, the protective housing (5) are located to hide the height and size of shell (4) outside part and are greater than the distance between upper and lower adjacent spacing groove (6).

6. The thermal flow sensor of claim 1, wherein: be fixed connection between connecting rod (11) and instrument body (1) and loop bar (12), the inboard cavity of loop bar (12), and the upper end of telescopic link (13) inlays in the inboard of loop bar (12), be fixed connection between spacing kicking block (14) and telescopic link (13), be swing joint between spacing kicking block (14) and loop bar (12), be fixed connection between spacing piece of elasticity (16) and telescopic link (13).