CN218994423U

CN218994423U - Vortex street flowmeter

Info

Publication number: CN218994423U
Application number: CN202223522396.5U
Authority: CN
Inventors: 俞平权
Original assignee: Boca Measurement And Control Technology Shanghai Co ltd
Current assignee: Boca Measurement And Control Technology Shanghai Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-05-09
Anticipated expiration: 2032-12-29

Abstract

The utility model relates to the technical field of flow meters, in particular to a vortex shedding flow meter. The technical scheme includes that the digital display meter head, survey pipe, vortex generator and probe, survey pipe inside one side installs the vortex generator, survey pipe inside one side of deviating from the vortex generator installs the solid fixed ring, the solid fixed ring inner wall is equipped with the annular groove, annular groove internally mounted has the filter screen, the inboard axle center position department of filter screen is connected with bevel gear A, the top of survey pipe inner wall is close to the inboard position department of filter screen and installs bevel gear B through the transmission shaft, and bevel gear A and bevel gear B mesh mutually. The utility model can filter out larger hard impurities in the measured fluid, and avoid larger abrasion on the surface of the vortex generator for a long time, thereby avoiding the change of the size of the vortex generator, ensuring the accuracy of the vortex shedding flowmeter, ensuring the cleanliness of the surface of the filter screen, and being beneficial to the measured fluid to normally pass through the filter screen.

Description

Vortex street flowmeter

Technical Field

The utility model relates to the technical field of flow meters, in particular to a vortex shedding flow meter.

Background

The vortex street flow meter is based on Karman vortex street theory, and is made up by using piezoelectric crystal or differential capacitor as detection component, and its principle is formed from vortex generator designed in flow field, detection probe and related electronic circuit, when the liquid is passed through the triangular prism-shaped vortex generator, two rows of vortices are formed, and said vortices are called Karman vortex street, and these vortices form a series of negative pressures which are alternatively changed, and said pressures are acted on the detection deep head to produce a series of alternating electric signals, and after the conversion, shaping and amplification treatment of preamplifier, the pulse frequency signals which are in direct proportion to the vortices are outputted.

In the existing vortex shedding flowmeter, hard large particle impurities in the measured fluid can cause larger impact abrasion on the surface of a vortex generator in the flowing process, and the size of the vortex generator can be changed greatly in the long-term use process, so that the measuring precision is influenced.

Disclosure of Invention

The utility model aims to provide a vortex shedding flowmeter, which has the advantages that the large hard impurities in the measured fluid can be filtered, and the large abrasion on the surface of a vortex generator is avoided, so that the change of the size of the vortex generator is avoided, the accuracy of the vortex shedding flowmeter is ensured, meanwhile, the cleanliness of the surface of a filter screen is ensured, the normal passing of the measured fluid through the filter screen is facilitated, the problem that the large impact abrasion on the surface of the vortex generator is caused in the flowing process of the hard large particle impurities in the measured fluid in the measuring process of the conventional vortex shedding flowmeter, and the large change of the size of the vortex generator is caused in the long-term use process, so that the measuring precision is influenced is solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions: including digital display meter head, survey pipe, vortex generator and probe, survey pipe inside one side installs the vortex generator, survey pipe inside one side of deviating from the vortex generator installs solid fixed ring, gu fixed ring inner wall is equipped with annular groove, annular groove internally mounted has the filter screen, the inboard axle center position department of filter screen is connected with bevel gear A, the top of survey pipe inner wall is close to the inboard position department of filter screen and installs bevel gear B through the transmission shaft, and bevel gear A and bevel gear B mesh mutually, survey pipe inside is close to gu fixed ring outside position department and installs the receiver, the brush board is installed to the receiver inboard, survey pipe lower surface is located receiver below position department and installs the slag discharge valve.

Preferably, a connecting rod is arranged on the upper surface of the measuring tube near the position outside the vortex generator, one end of the connecting rod is connected with a probe, the probe is positioned inside the measuring tube, and the tail end of the connecting rod is connected with a digital display meter head.

Preferably, a rotating motor is arranged on the upper surface of the measuring tube at a position above the transmission shaft, the tail end of an output shaft of the rotating motor is connected with the tail end of the transmission shaft, and the rotating motor drives the transmission shaft to rotate.

Preferably, a rectifier is arranged at one side of the measuring tube, which is close to the vortex generator, and fluid passing through the filter screen flows through the vortex generator after being rectified by the rectifier, so that the influence on the measurement of the fluid is avoided.

Preferably, the two sides of the measuring tube are symmetrically welded with connecting flanges, and the measuring tube is connected into the fluid pipeline through the two connecting flanges.

Compared with the prior art, the utility model has the following beneficial effects:

according to the utility model, through arranging the filter screen, the storage box, the hairbrush plate, the slag discharge valve, the bevel gear A, the bevel gear B, the fixed ring and the annular groove, the purpose of filtering out larger hard impurities in measured fluid is achieved, the large abrasion on the surface of the vortex generator is avoided, the size change of the vortex generator is avoided, the accuracy of the vortex shedding flowmeter is ensured, meanwhile, the cleanliness of the surface of the filter screen is ensured, the effect that the measured fluid normally passes through the filter screen is facilitated, when the measuring tube is connected into a fluid pipeline through two connecting flanges, the fluid is filtered out by the filter screen after passing through the filter screen, the large abrasion on the surface of the vortex generator is avoided, the fluid passing through the filter screen forms a vortex under the action of the vortex generator, the flow of the fluid is detected through the probe and the digital display gauge head, meanwhile, the rotating motor drives the filter screen to rotate through the bevel gear A and the bevel gear B, the impurities adhered on the surface of the filter screen are brushed out, and fall into the storage box, and the slag discharge valve is opened, and the impurities collected in the storage box and the filter screen are discharged.

Drawings

FIG. 1 is a schematic diagram of the main sectional structure of the present utility model;

FIG. 2 is a schematic view of a partial main cross-sectional structure of a filter screen according to the present utility model;

fig. 3 is an enlarged schematic view of the structure of fig. 1 a according to the present utility model.

Reference numerals: 1. a digital display meter head; 2. a connecting rod; 3. a rotating motor; 4. a storage box; 5. a brush plate; 6. a filter screen; 7. a connecting flange; 8. a measuring tube; 9. a slag discharging valve; 10. a rectifier; 11. a vortex generator; 12. a probe; 13. a fixing ring; 14. an annular groove; 15. bevel gears A; 16. a transmission shaft; 17. bevel gear B.

Detailed Description

The technical scheme of the utility model is further described below with reference to the attached drawings and specific embodiments.

As shown in fig. 1 to 3, the vortex shedding flowmeter provided by the utility model comprises a digital display meter head 1, a measuring tube 8, a vortex generator 11 and a probe 12, wherein the vortex generator 11 is arranged at one side of the inner part of the measuring tube 8, a rectifier 10 is arranged at one side of the inner part of the measuring tube 8, which is close to the vortex generator 11, fluid after passing through a filter screen 6 flows through the vortex generator 11 after being rectified by the rectifier 10, the fluid is prevented from being influenced by measurement, a connecting rod 2 is arranged at the position, which is close to the outer side of the vortex generator 11, of the upper surface of the measuring tube 8, one end of the connecting rod 2 is connected with the probe 12, the probe 12 is positioned in the measuring tube 8, the end of the connecting rod 2 is connected with the digital display meter head 1, a fixed ring 13 is arranged at one side, which is far away from the vortex generator 11, of the inner wall of the fixed ring 13 is provided with an annular groove 14, the filter screen 6 is installed in the annular groove 14, the filter screen 6 can rotate in the annular groove 14, a bevel gear A15 is connected to the position of the inner axis of the filter screen 6, a bevel gear B17 is installed on the position, close to the inner side of the filter screen 6, of the top of the inner wall of the measuring tube 8 through a transmission shaft 16, the bevel gear A15 is meshed with the bevel gear B17, a rotating motor 3 is installed on the upper surface of the measuring tube 8, the tail end of an output shaft of the rotating motor 3 is connected with the tail end of the transmission shaft 16, a storage box 4 is installed on the position, close to the outer side of a fixed ring 13, of the inner side of the storage box 4, a hairbrush plate 5 is installed on the inner side of the storage box 4, a slag discharge valve 9 is installed on the lower surface of the measuring tube 8, and connecting flanges 7 are symmetrically welded on two sides of the measuring tube 8.

When the utility model is used, the measuring tube 8 is connected into a fluid pipeline through the two connecting flanges 7, the fluid passes through the filter screen 6 and is filtered by the filter screen 6 to remove larger hard impurities, so that the surface of the vortex generator 11 is prevented from being greatly worn for a long time, the fluid passing through the filter screen 6 forms a vortex under the action of the vortex generator 11, the probe 12 and the digital display meter 1 detect the flow of the fluid, the rotating motor 3 drives the filter screen 6 to rotate through the bevel gear A15 and the bevel gear B17, the brush plate 5 at the inner side of the storage box 4 brushes the impurities adhered to the surface of the filter screen 6 and falls into the storage box 4, and the impurities collected in the storage box 4 and the impurities falling on the filter screen 6 are discharged after the slag discharge valve 9 is opened.

The above-described embodiments are merely a few preferred embodiments of the present utility model, and many alternative modifications and combinations of the above-described embodiments will be apparent to those skilled in the art based on the technical solutions of the present utility model and the related teachings of the above-described embodiments.

Claims

1. The utility model provides a vortex street flowmeter, includes digital display gauge outfit (1), survey buret (8), vortex generator (11) and probe (12), its characterized in that: the utility model discloses a measuring pipe, including survey pipe (8), fixed ring (13) are installed to survey pipe (8) inside one side of installing vortex generator (11), fixed ring (13) inner wall is equipped with annular groove (14), annular groove (14) internally mounted has filter screen (6), filter screen (6) inboard axle center position department is connected with bevel gear A (15), survey pipe (8) inner wall's top is close to filter screen (6) inboard position department and installs bevel gear B (17) through transmission shaft (16), and bevel gear A (15) and bevel gear B (17) mesh mutually, survey pipe (8) inside is close to fixed ring (13) outside position department and installs receiver (4), brush board (5) are installed to receiver (4) inboard, survey pipe (8) lower surface is located receiver (4) below position department and installs sediment valve (9).

2. A vortex shedding flowmeter as claimed in claim 1, wherein: the measuring tube (8) upper surface is close to vortex generator (11) outside position department and installs connecting rod (2), connecting rod (2) one end is connected with probe (12), and probe (12) are located measuring tube (8) inside, connecting rod (2) end-to-end connection has digital display gauge outfit (1).

3. A vortex shedding flowmeter as claimed in claim 1, wherein: the upper surface of the measuring tube (8) is positioned above the transmission shaft (16) and is provided with a rotating motor (3), and the tail end of an output shaft of the rotating motor (3) is connected with the tail end of the transmission shaft (16).

4. A vortex shedding flowmeter as claimed in claim 1, wherein: a rectifier (10) is arranged at one side, close to the vortex generator (11), of the inside of the measuring tube (8).

5. A vortex shedding flowmeter as claimed in claim 1, wherein: connecting flanges (7) are symmetrically welded on two sides of the measuring tube (8).