CN219301696U

CN219301696U - Measuring device of high-precision differential pressure flowmeter

Info

Publication number: CN219301696U
Application number: CN202320333926.7U
Authority: CN
Inventors: 郑毅超
Original assignee: Shanghai Buer Automation Control Co ltd
Current assignee: Shanghai Buer Automation Control Co ltd
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-07-04
Anticipated expiration: 2033-02-27

Abstract

The utility model relates to the technical field of differential pressure flowmeters, in particular to a measuring device of a high-precision differential pressure flowmeter. The technical proposal comprises: including flowmeter main part and differential pressure sensor, be provided with the orifice plate in the flowmeter main part, differential pressure sensor installs in flowmeter main part below, and is fixed through two honeycomb ducts, and two honeycomb ducts are located the orifice plate both sides respectively, and the orifice plate includes fixed plate and fly leaf, and the fixed plate is fixed in the flowmeter main part, and fly leaf sliding connection is on the fixed plate lateral wall, and the fixed slot has been seted up to fixed plate lower extreme central point put, and the fly leaf lower extreme has been seted up the fly leaf, and the fixed slot height is greater than the fly slot height, and flowmeter main part upper end is provided with the adjustment mechanism who drives the fly leaf and go up and down. The utility model can adjust the opening size of the fixed groove by utilizing the up-and-down movement of the movable plate, and can reduce the opening when the measured liquid flow velocity is smaller, thereby increasing the pressure difference pore plate and ensuring the measurement accuracy by utilizing the method of amplifying the pressure difference.

Description

Measuring device of high-precision differential pressure flowmeter

Technical Field

The utility model relates to the technical field of differential pressure flowmeters, in particular to a measuring device of a high-precision differential pressure flowmeter.

Background

The differential pressure flowmeter is a metering device for the flow of liquid in a pipeline, and utilizes an orifice plate to limit the flow of the inflow liquid, and then calculates the flow by measuring the pressure difference at two sides of the orifice plate.

When the differential pressure flowmeter is used, the pressure difference between two sides of the orifice plate is directly related to the liquid flow rate and the aperture size of the orifice plate, and the aperture size of the orifice plate of the common differential pressure flowmeter is fixed, so that under the condition that the liquid flow rate is small, if the aperture of the orifice plate is large, the pressure difference between two sides of the orifice plate is relatively small, the accurate measurement of the pressure difference is difficult, and meanwhile, the aperture is small, in the liquid measurement of the faster flow rate, the normal flow of liquid can be seriously influenced, therefore, a structure which can adjust the aperture of the orifice plate according to the actual liquid flow rate is needed to be designed, and the accurate measurement of the liquid flow can be ensured under the condition that the normal flow of the liquid is not influenced.

Disclosure of Invention

The utility model aims at solving the problems in the background technology and provides a measuring device of a high-precision differential pressure flowmeter.

The technical scheme of the utility model is as follows: the utility model provides a measuring device of high accuracy differential pressure flowmeter, includes flowmeter main part and differential pressure sensor, be provided with the orifice plate in the flowmeter main part, differential pressure sensor installs in flowmeter main part below, and is fixed through two honeycomb ducts, two the honeycomb duct is located the orifice plate both sides respectively, the orifice plate includes fixed plate and fly leaf, the fixed plate is fixed in the flowmeter main part, fly leaf sliding connection is on the fixed plate lateral wall, the fixed slot has been seted up to fixed plate lower extreme central point put, the fly leaf lower extreme has been seted up the fly slot, the fixed slot height is greater than the fly slot height, flowmeter main part upper end is provided with the adjustment mechanism who drives the fly leaf and go up and down.

Preferably, the adjusting mechanism comprises an end plate and a threaded rod, the end plate is fixed at the upper end of the flowmeter body, the position of the end plate is aligned with the movable plate, the threaded rod is connected to the end plate in a rotating mode, the bottom of the threaded rod is connected to the center of the upper end of the movable plate in a threaded mode, and the upper end of the threaded rod penetrates through the end plate and is fixedly connected with the rotating plate.

Preferably, the bottom of the end plate is provided with a storage groove, the storage groove is aligned with the movable plate, the upper end of the movable plate can be stored in the storage groove, and the stroke of the movable plate is increased.

Preferably, the fixed plate is close to the fly leaf one side fixedly connected with sealed pad, sealed pad is located the fixed slot periphery, can guarantee the leakproofness of fixed plate and fly leaf junction.

Preferably, a pair of limiting grooves are formed in one side, close to the movable plate, of the fixed plate, limiting blocks are fixed on the movable plate and correspond to the limiting grooves, and the limiting blocks are slidably connected in the limiting grooves.

Preferably, the two ends of the flowmeter main body are fixedly connected with mounting flanges, and the flowmeter is mainly used for connecting pipelines.

Compared with the prior art, the utility model has the following beneficial technical effects: the size of the opening of the fixed groove can be adjusted by utilizing the up-and-down movement of the movable plate, and the opening can be reduced when the measured liquid flow velocity is smaller, so that the pressure difference pore plate is increased, and the accuracy of measurement is ensured by utilizing the method of amplifying the pressure difference.

Drawings

FIG. 1 is a schematic view of the front cut-away structure of the present utility model;

FIG. 2 is a schematic view of an assembled structure of a fixed plate and a movable plate according to the present utility model;

FIG. 3 is a schematic side sectional view of the flowmeter body of the present utility model;

fig. 4 is a schematic view of the appearance structure of the movable plate according to the present utility model.

Reference numerals: 1. a flowmeter body; 2. a mounting flange; 3. a differential pressure sensor; 4. an orifice plate; 41. a fixing plate; 411. a fixing groove; 412. a sealing gasket; 413. a limit groove; 42. a movable plate; 421. a movable groove; 422. a limiting block; 5. an adjusting mechanism; 51. an end plate; 52. a threaded rod; 53. a rotating plate; 6. and a flow guiding pipe.

Detailed Description

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

Examples

As shown in fig. 1-4, the measuring device of the high-precision differential pressure flowmeter provided by the utility model comprises a flowmeter main body 1 and a differential pressure sensor 3, wherein an orifice plate 4 is arranged in the flowmeter main body 1, the differential pressure sensor 3 is installed below the flowmeter main body 1 and is fixed through two guide pipes 6, the two guide pipes 6 are respectively positioned at two sides of the orifice plate 4, the orifice plate 4 comprises a fixed plate 41 and a movable plate 42, the fixed plate 41 is fixed in the flowmeter main body 1, the movable plate 42 is slidably connected to the side wall of the fixed plate 41, a fixed slot 411 is formed in the center position of the lower end of the fixed plate 41, a movable slot 421 is formed in the lower end of the movable plate 42, the height of the fixed slot 411 is greater than that of the movable slot 421, an adjusting mechanism 5 for driving the movable plate 42 to lift is arranged at the upper end of the flowmeter main body 1, a sealing gasket 412 is fixedly connected to one side of the fixed plate 41 close to the movable plate 42, the sealing gasket 412 is positioned at the periphery of the fixed slot 411, a pair of limiting slots 413 are formed in one side of the fixed plate 41 close to the movable plate 42, limiting blocks 422 are fixedly arranged at positions corresponding to the limiting slots 413, the limiting blocks 422 are slidably connected to the limiting slots 413, and the two ends of the flowmeter main body 1 are fixedly connected with flanges 2.

The adjustment mechanism 5 includes end plate 51 and threaded rod 52, end plate 51 is fixed in flowmeter main part 1 upper end, and the position aligns with fly leaf 42, rotate on the end plate 51 and be connected with threaded rod 52, threaded rod 52 bottom threaded connection is in fly leaf 42 upper end central point put, end plate 51 and fixedly connected with revolving plate 53 are passed to threaded rod 52 upper end, the storage tank has been seted up to end plate 51 bottom, storage tank position aligns with fly leaf 42 position, utilize the rotation of revolving plate 53, can drive threaded rod 52 and rotate, at this moment because fly leaf 42 receives the spacing of stopper 422, lead to fly leaf 42 can carry out the up-and-down motion, change the opening size of fixed slot 411.

In this embodiment, the rotation of the counter-rotating plate 53 is utilized to drive the threaded rod 52 to rotate, at this time, since the movable plate 42 is limited by the limiting block 422, the movable plate 42 can move up and down, the opening size of the fixed slot 411 is changed, when the detected liquid flows into the flowmeter main body 1, the flow speed change can be generated through the fixed slot 411 and the limiting block 422, so that the pressure difference is generated at two sides of the orifice plate 4, the pressure difference can be obtained in the pressure difference sensor 3 by utilizing the diversion of the diversion pipe 6, when the opening of the fixed slot 411 is larger, the pressure difference is relatively smaller, otherwise, the pressure difference is larger, so that when the liquid flow speed is smaller, the pressure difference can be increased by reducing the opening size of the fixed slot 411, the pressure difference sensor 3 can more accurately measure the pressure difference, the measurement accuracy is improved, and when the liquid flow speed is larger, the opening size of the fixed slot 411 can be increased, so that the flow resistance to the liquid is reduced, and the normal flow of the liquid is ensured.

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 measuring device of high accuracy differential pressure flowmeter, includes flowmeter main part (1) and differential pressure sensor (3), be provided with orifice plate (4) in flowmeter main part (1), differential pressure sensor (3) are installed in flowmeter main part (1) below, and are fixed through two honeycomb ducts (6), two honeycomb duct (6) are located orifice plate (4) both sides, its characterized in that respectively: orifice plate (4) are including fixed plate (41) and fly leaf (42), fixed plate (41) are fixed in flowmeter main part (1), fly leaf (42) sliding connection is on fixed plate (41) lateral wall, fixed slot (411) have been seted up to fixed plate (41) lower extreme central point put, activity groove (421) have been seted up to fly leaf (42) lower extreme, fixed slot (411) highly are greater than activity groove (421) height, flowmeter main part (1) upper end is provided with adjustment mechanism (5) that drive fly leaf (42) and go up and down.

2. The measuring device of a high-precision differential pressure flowmeter according to claim 1, wherein the adjusting mechanism (5) comprises an end plate (51) and a threaded rod (52), the end plate (51) is fixed at the upper end of the flowmeter body (1) and aligned with the movable plate (42), the threaded rod (52) is rotatably connected to the end plate (51), the bottom of the threaded rod (52) is in threaded connection with the central position of the upper end of the movable plate (42), and the upper end of the threaded rod (52) penetrates through the end plate (51) and is fixedly connected with the rotary plate (53).

3. The measuring device of a high-precision differential pressure flowmeter according to claim 2, wherein the bottom of the end plate (51) is provided with a receiving groove, and the receiving groove is aligned with the movable plate (42).

4. The measuring device of a high-precision differential pressure flowmeter according to claim 1, wherein a sealing gasket (412) is fixedly connected to one side of the fixed plate (41) close to the movable plate (42), and the sealing gasket (412) is located at the periphery of the fixed slot (411).

5. The measuring device of a high-precision differential pressure flowmeter according to claim 1, wherein a pair of limiting grooves (413) are formed in one side, close to the movable plate (42), of the fixed plate (41), limiting blocks (422) are fixed on the movable plate (42) and correspond to the limiting grooves (413), and the limiting blocks (422) are slidably connected in the limiting grooves (413).

6. The measuring device of a high-precision differential pressure flowmeter according to claim 1, wherein the two ends of the flowmeter body (1) are fixedly connected with mounting flanges (2).