CN215811019U

CN215811019U - Precession vortex gas flowmeter that precision is high

Info

Publication number: CN215811019U
Application number: CN202122205889.5U
Authority: CN
Inventors: 赵吉利; 祁舒; 杨光彬
Original assignee: Panjin Liaohe Oilfield Xingdong High Tech Development Co ltd
Current assignee: Panjin Liaohe Oilfield Xingdong High Tech Development Co ltd
Priority date: 2021-09-13
Filing date: 2021-09-13
Publication date: 2022-02-11
Anticipated expiration: 2031-09-13

Abstract

The utility model is suitable for the technical field of flowmeters, and provides a precession vortex gas flowmeter with high accuracy. According to the utility model, through the arrangement of the rotating blades, in the environment of the closed pipeline, namely the inside of the detection shell, fluid flows in an unobstructed manner along the inlet of the vortex generating structure, the flow direction of the fluid is tangential to the rotating blades at the inlet end of the eight channels of the vortex generating structure, the fluid flowing into the vortex generating structure forms a spiral Venturi channel along the eight arc spiral channels which are gradually shortened from the inlet to the outlet, two channels are added to the eight channels compared with the six channels, the rotating frequency of the fluid is improved, and more precession frequency signals can be generated and obtained under the same gas flow rate, so that the flow stability and the measurement resolution are improved.

Description

Precession vortex gas flowmeter that precision is high

Technical Field

The utility model relates to the technical field of flowmeters, in particular to a precession vortex gas flowmeter with high accuracy.

Background

The precession vortex flowmeter is a fluid oscillatory flowmeter developed in the 70 s of the 20 th century, and is used for measuring flow by utilizing vortex precession phenomenon, wherein vortex precession frequency is in direct proportion to the flow of fluid.

Among the prior art, the vortex generating body's in the precession vortex flowmeter function is to produce the vortex precession, and the current market generally uses six-blade spiral arc type vortex generating body, only has six water conservancy diversion passageways, does not have the water conservancy diversion stroke moreover, can form great vortex under the impact of area pressure gas, influences the measurement repeatability and the precision of instrument to pressure loss is great, and the range scope is less, and is relatively poor in the lower limit stability of range.

SUMMERY OF THE UTILITY MODEL

The utility model provides a precession vortex gas flowmeter with high precision, and aims to solve the problems that a vortex generating body in the precession vortex flowmeter in the background technology has the function of generating vortex precession, a six-blade spiral arc type vortex generating body is generally used in the market at present, only has six flow guide channels and does not have flow guide strokes, larger turbulent flow can be formed under the impact of pressurized gas, the measurement repeatability and precision of the meter are influenced, the pressure loss is large, the range is small, and the stability at the lower limit of the range is poor.

The precession vortex gas flowmeter with high precision comprises a detection shell, wherein a vortex generating structure is arranged on the left side inside the detection shell, a middle connecting rod is arranged inside the vortex generating structure, rotating blades are fixedly connected to the outer surface of the middle connecting rod, the number of the rotating blades is eight, a limiting rotating slide block is fixedly connected to the left side of the outer surface of the vortex generating structure, a clamping sliding groove is formed in the left side of the detection shell, a rotating sliding groove is formed in the right side of the clamping sliding groove, and the clamping sliding groove is communicated with the rotating sliding groove.

Preferably, the clearances among the eight rotating blades are gradually reduced from left to right.

Preferably, the outer surface of the detection shell is fixedly connected with a detection connecting pipe, and one end of the detection connecting pipe, which is far away from the detection shell, is fixedly connected with a measuring device.

Preferably, the both sides of detecting the shell all fixedly connected with side connection pad, one side that the detecting shell was kept away from to the side connection pad is provided with interior sealing rubber packing ring.

Preferably, the outer edge department fixedly connected with of one side of detecting the shell is kept away from to the side connection pad extrudes the cover outward, spacing cutting ferrule in the inner edge department fixedly connected with of one side of detecting the shell is kept away from to the side connection pad, interior sealing rubber packing ring joint is between outer extrusion cover and interior spacing cutting ferrule.

Preferably, the width of the outer extrusion sleeve is larger than that of the inner limiting clamping sleeve.

Compared with the prior art, the utility model has the beneficial effects that: the precession vortex gas flowmeter with high precision of the utility model is characterized in that through the arrangement of the rotating blades, in the environment of the inner part of a closed pipeline, namely a detection shell, fluid flows in without blocking along the inlet of a vortex generating structure, the flow direction of the fluid is tangent to the rotating blades at the inlet end of an eight-channel of the vortex generating structure, the fluid flowing into the vortex generating structure forms a spiral Venturi channel along eight arc spiral channels which are gradually shortened from the inlet to the outlet, the eight channels are added with two channels compared with a six channel to improve the rotating frequency of the fluid, under the same gas flow rate, more precession frequency signals can be generated and obtained, thereby improving the flow stability and the measurement resolution, through the arrangement of an outer extrusion sleeve and an inner limiting cutting sleeve, and the arrangement of an inner sealing rubber gasket, the connecting position can be limited through the outer extrusion sleeve when a side connecting disc is installed, thereby prevent to detect the slope of shell, thereby be convenient for install, can carry out spacing once more with the interior anchor ring of connecting piece through interior spacing cutting ferrule simultaneously, simultaneously when fastening the side connection pad, through the extrusion, can make interior sealing rubber packing ring warp, through the restriction of interior spacing cutting ferrule and outer extrusion cover, removal region when can making interior sealing rubber packing ring warp reduces, thereby can carry out the shutoff with the clearance between side connection pad and the connecting piece, thereby further increase the leakproofness.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic illustration of an explosive structure according to the present invention;

FIG. 3 is a schematic view of the tilted bottom structure of the detection housing of the present invention.

In the figure:

1. detecting the shell; 11. a side connecting plate; 12. a measuring device; 13. an outer extrusion sleeve; 14. an inner sealing rubber gasket; 15. an inner limiting clamping sleeve; 16. detecting a connecting pipe;

2. a vortex generating structure; 21. clamping the sliding chute; 22. a rotating blade; 23. a middle connecting rod; 24. a limiting rotary sliding block; 25. the chute is rotated.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Referring to fig. 1-3, the present invention provides a technical solution: the utility model provides a precession swirl gas flowmeter that precision is high, including detecting housing 1, the left side of detecting housing 1's inside is provided with swirl emergence structure 2, swirl emergence structure 2's inside includes middle part connecting rod 23, the outer fixed surface of middle part connecting rod 23 is connected with rotating vane 22, rotating vane 22's quantity is eight, the spacing slider 24 that rotates of the left side fixedly connected with of swirl emergence structure 2's surface, joint spout 21 has been seted up to detecting housing 1's left inside, internal rotation spout 25 has been seted up on joint spout 21's right side, communicate between joint spout 21 and the internal rotation spout 25.

In the embodiment, the gas enters the right side of the rotating blade 22 through the guide stroke on the left side of the rotating blade 22 to form a rotating channel, so that disturbance caused by impact is reduced, pressure loss is reduced, and the gas disturbance is reduced, the rotating frequency is increased, the measurement stability is improved, particularly the measurement stability is obviously improved at the lower limit of the measuring range due to the adoption of the guide stroke and the eight-blade structure of the eight rotating blades 22.

Further, the clearances between the eight rotary blades 22 are gradually reduced from left to right.

In the present embodiment, in the environment inside the closed pipeline, i.e. the detection enclosure 1, the fluid flows in the inlet of the vortex generating structure 2 without blocking, the flow direction is tangential to the rotating blades 22 at the inlet end of the eight channels of the vortex generating structure 2, the fluid flowing into the vortex generating structure 2 forms a spiral venturi channel along the eight arc spiral channels which are gradually shortened from the inlet to the outlet, the eight channels are added with two channels compared with the six channels, the fluid rotation frequency is improved, and under the same gas flow rate, more precession frequency signals can be generated and obtained, thereby improving the flow stability and the measurement resolution.

Further, a detection connecting pipe 16 is fixedly connected to the outer surface of the detection housing 1, and a measuring device 12 is fixedly connected to one end, far away from the detection housing 1, of the detection connecting pipe 16.

In this embodiment, by detecting the rotation of the connection pipe 16, replacement of the measuring device 12 can be facilitated, thereby facilitating maintenance of the measuring device 12.

Further, both sides of the detection shell 1 are fixedly connected with side connection discs 11, and one side of each side connection disc 11, which is far away from the detection shell 1, is provided with an inner sealing rubber gasket 14.

In the present embodiment, the inner seal rubber gasket 14 is used to form a closed space in the detection housing 1 to detect leakage of fluid, thereby improving the accuracy of gas detection.

Further, the outer edge of one side of the side connecting disc 11, which is far away from the detection shell 1, is fixedly connected with an outer extrusion sleeve 13, the inner edge of one side of the side connecting disc 11, which is far away from the detection shell 1, is fixedly connected with an inner limiting clamping sleeve 15, and the inner sealing rubber gasket 14 is clamped between the outer extrusion sleeve 13 and the inner limiting clamping sleeve 15.

In this embodiment, through the setting of outer extrusion cover 13 and interior spacing cutting ferrule 15, sealed rubber gasket 14 in the cooperation, can be when installing side connection pad 11, the position of will connecting is injectd through outer extrusion cover 13, thereby prevent to detect the slope of shell 1, thereby be convenient for install, can carry out spacing once more with the interior anchor ring of connecting piece through interior spacing cutting ferrule 15 simultaneously, simultaneously when fastening side connection pad 11, through the extrusion, can make interior sealed rubber gasket 14 warp, through the restriction of interior spacing cutting ferrule 15 with outer extrusion cover 13, can make the removal region when interior sealed rubber gasket 14 warp reduce, thereby can block up the clearance between side connection pad 11 and the connecting piece, thereby further increase the leakproofness.

Further, the width of the outer extrusion sleeve 13 is larger than that of the inner limiting cutting sleeve 15.

In the embodiment, the design can reduce the extrusion distance between the inner ring surface of the connecting piece and the inner ring surface of the connecting piece during installation, thereby reducing the installation difficulty during installation.

The working principle and the using process of the utility model are as follows: when the utility model is installed, a measuring device 12 and a detection connecting pipe 16 are installed, an outer extrusion sleeve 13 is sleeved on the outer side of a connecting piece so as to limit a detection shell 1, then the detection shell 1 is pushed to enable the outer surface of an inner limiting clamping sleeve 15 to be clamped with the inner ring surface of the connecting piece, then a side connecting disc 11 is fastened with the connecting piece, the connecting piece is extruded to an inner sealing rubber gasket 14 through extrusion so as to enable the inner sealing rubber gasket 14 to deform, a gap between the side connecting disc 11 and the connecting piece is sealed, the deformation degree of the inner sealing rubber gasket 14 during extrusion is limited through the outer extrusion sleeve 13 and the inner limiting clamping sleeve 15, most of the inner sealing rubber gasket 14 is remained on the outer sides of the side connecting disc 11 and the connecting piece after the inner sealing rubber gasket is extruded, so that a gap is sealed on the connecting surface, and then the inner sealing rubber gasket enters from the left side of a rotating blade 22 through the flow of gas, and flows out from the right side, and the gas flow is detected by the measuring device 12.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a precession vortex gas flowmeter that precision is high, includes detection shell (1), its characterized in that: the left side of the inside of detecting shell (1) is provided with the swirl and takes place structure (2), the inside that the swirl takes place structure (2) includes middle part connecting rod (23), the outer fixed surface of middle part connecting rod (23) is connected with rotating vane (22), the quantity of rotating vane (22) is eight, the swirl takes place the spacing slider (24) that rotates of the left side fixedly connected with of the surface of structure (2), joint spout (21) has been seted up to the left inside of detecting shell (1), internal rotation spout (25) have been seted up on the right side of joint spout (21), communicate between joint spout (21) and internal rotation spout (25).

2. A high accuracy precession vortex gas flowmeter as defined in claim 1 wherein: the clearances among the eight rotating blades (22) are gradually reduced from left to right.

3. A high accuracy precession vortex gas flowmeter as defined in claim 1 wherein: the outer fixed surface of detecting shell (1) is connected with detects connecting pipe (16), detect one end fixedly connected with measuring device (12) that detecting shell (1) was kept away from in connecting pipe (16).

4. A high accuracy precession vortex gas flowmeter as defined in claim 1 wherein: the side connection disc (11) is fixedly connected to the two sides of the detection shell (1), and an inner sealing rubber gasket (14) is arranged on one side, away from the detection shell (1), of the side connection disc (11).

5. A high accuracy precession vortex gas flowmeter according to claim 4 further comprising: side connection pad (11) are kept away from outer edge fixedly connected with of one side of detecting shell (1) and are pushed set (13) outward, limit cutting ferrule (15) in the inner edge fixedly connected with of one side of detecting shell (1) is kept away from in side connection pad (11), interior sealing rubber packing ring (14) joint is between outer extrusion set (13) and interior limit cutting ferrule (15).

6. A high accuracy precession vortex gas flowmeter according to claim 5 further comprising: the width of the outer extrusion sleeve (13) is larger than that of the inner limiting clamping sleeve (15).