CN214748164U

CN214748164U - Flow detection device of metal tube float flowmeter

Info

Publication number: CN214748164U
Application number: CN202120903744.XU
Authority: CN
Inventors: 王婷婷; 张微; 金传鋆; 贾文菘
Original assignee: DANDONG TOP ELECTRONICS INSTRUMENT (GROUP) CO LTD
Current assignee: DANDONG TOP ELECTRONICS INSTRUMENT (GROUP) CO LTD
Priority date: 2021-04-29
Filing date: 2021-04-29
Publication date: 2021-11-16
Anticipated expiration: 2031-04-29

Abstract

The utility model discloses a flow detection device of a metal pipe float flowmeter, which comprises a measuring pipe, a flange at the upper end of the measuring pipe, a flange at the lower end of the measuring pipe, a pore plate, a cone float, an upper limit seat, a lower limit seat and an inner lining, wherein the lower end of the inner lining is provided with a flange which is matched with an inner rabbet platform arranged on the flange at the lower end of the measuring pipe; the upper end of the upper limiting seat is provided with a flange which is in flush fit with an inner spigot platform arranged on a flange at the upper end of the measuring tube, the upper end of the lining is in threaded fit butt joint with the ring sleeve part of the upper limiting seat, the lower limiting seat is in threaded fit and fixed with an inner spigot groove arranged at the lower part of the lining, the upper end of the U-shaped pore plate is provided with a flange which is in fit positioning with the inner spigot platform arranged at the middle part of the lining, the structure is reasonable, the lining and the upper limiting seat cannot be strongly extruded when the U-shaped pore plate is installed and used, and deformation is not easy to generate; meanwhile, the lower limiting seat and the pore plate are not stressed by extrusion force and do not deform, and the normal zero setting and measurement accuracy of the flowmeter display are ensured.

Description

Flow detection device of metal tube float flowmeter

Technical Field

The utility model relates to a tubular metal resonator float flowmeter, especially tubular metal resonator float flowmeter's flow detection device.

Background

The metal tube float flowmeter consists of two parts, namely a flow detection device and a meter head device.

When the metal pipe float flowmeter is used, the fluid medium is often strongly corrosive, so the flow detection device arranged on the pipeline needs to be protected against corrosion,

the flow detection device of the metal pipe float flowmeter in the prior art comprises a measuring pipe, a flange at the upper end of the measuring pipe, a flange at the lower end of the measuring pipe, a pore plate, a cone float, an upper limiting seat and a lower limiting seat. In order to prevent corrosion, the orifice plate, the upper limiting seat, the lower limiting seat and the cone floater are made of polytetrafluoroethylene or other non-metal materials with better corrosion resistance, and the inner wall of the measuring pipe is provided with a lining and a lining sleeve made of corrosion-resistant materials.

In the prior art, an inner lining and an inner and outer thread of a lower limiting seat are in butt joint to form an anti-corrosion inner sleeve of an I-shaped measuring pipe, a U-shaped pore plate is arranged on a spigot platform arranged on the inner lining and is pressed and fixed by the upper limiting seat through the lining, a cone floater is arranged at the center of the pore plate through the sliding fit of an upper end column rod and a lower end column rod thereof, the upper limiting seat and the lower limiting seat, and a central circular hole of the cone floater and the pore plate forms a variable annular flow area. The flow and the annular flow area form a corresponding relation, the flow is detected, and the larger the annular flow area is, the larger the corresponding fluid flow value is.

Above-mentioned prior art structure, because inside lining and lower spacing seat screw thread butt joint form the endotheca of I shape when on-the-spot installation is used to its upper and lower terminal surface exceeds buret upper end flange and surveys buret lower extreme flange outer terminal surface, can take place excessively to extrude inside lining and lower spacing seat during the installation, make inside lining and lower spacing seat very easily warp, make lower spacing seat take place the axial displacement and change. Because the initial position of the cone floater is positioned by the lower limit seat, the initial position of the cone floater can move upwards after the axial displacement of the lower limit seat changes, and therefore the annular area formed by the cone floater and the pore plate is enlarged, and the display of the flowmeter cannot return to zero.

In addition, the lining and the lower limit seat are extruded and deformed, the acting force is finally applied to the U-shaped pore plate, the U-shaped pore plate is a teflon sheet, the U-shaped pore plate is easily deformed due to the deformation of the lining and the vertical extrusion influence of the lining and the lining, the inner hole of the pore plate is deformed, the annular area formed by the cone floater and the pore plate is smaller than the annular area with the corresponding height in the prior art, and the measurement of the flowmeter is inaccurate.

SUMMERY OF THE UTILITY MODEL

The utility model aims at above-mentioned prior art weak point improves, provides a tubular metal resonator float flowmeter's flow detection device to guarantee good anticorrosive effect and flow detection accuracy.

The utility model discloses metal pipe float flowmeter's flow detection device, by surveying buret upper end flange, survey buret lower extreme flange, orifice plate, awl float, go up the spacing seat, constitute characterized by down spacing seat, inside lining, bush including surveying buret:

the lower end of the lining is provided with a flange, and the flange arranged on the lining is matched with an inner rabbet platform arranged on the flange at the lower end of the measuring tube in a flush manner; a flange is arranged at the upper end of the upper limiting seat, and the flange arranged at the upper end of the upper limiting seat is matched with an inner rabbet platform arranged on the flange at the upper end of the measuring tube; the upper end of the lining is in fit butt joint connection with the inner thread and the outer thread of the ring sleeve part of the upper limiting seat; the lining and the upper limiting seat form an anticorrosive coating in the measuring pipe;

an inner spigot groove is formed in the lower part of the lining, and the lower limiting seat is in threaded fit with, positioned and fixed to the inner spigot groove formed in the lower part of the lining, so that the lower limiting seat is fixedly arranged in the lining;

an inner spigot platform is arranged in the middle of the lining, a flange is arranged at the upper end of the U-shaped pore plate, the flange arranged at the upper end of the pore plate is matched and positioned with the inner spigot platform arranged in the middle of the lining, a bushing is arranged between the lower end of the ring sleeve part of the upper limiting seat and the flange arranged at the upper end of the pore plate, and the bushing axially positions the pore plate;

a positioning hole is formed in the center of the lower limiting seat, and a guide rod at the lower end of the conical floater is in sliding fit with the positioning hole formed in the center of the lower limiting seat;

a positioning guide cylinder is arranged at the center of the upper limiting seat, and a guide rod at the upper end of the conical floater is in sliding fit with the positioning guide cylinder arranged at the center of the upper limiting seat.

The utility model has simple and reasonable structure, when the upper and lower ends of the measuring tube are connected with the pipeline flange in a butt joint way, the lower end of the lining and the upper end of the upper limiting seat can not be extruded by strong force, and the deformation is not easy to generate; simultaneously, lower limit seat is disk body screw-thread fit fixed mounting in interior bushing, can not receive the extrusion effect when surveying buret and pipeline flange butt joint, does not produce the deformation, can not produce axial displacement, and lower limit seat can not change the lower limit initial position of awl float, can guarantee that the flowmeter shows normally to zero. The upper end of the U-shaped pore plate is provided with an inner spigot platform which is matched with the middle part of the lining and is axially positioned by the lining, so that the lining and the upper limiting seat can not generate strong extrusion deformation, and the lining only acts on the flange of the U-shaped pore plate under the fixed pressure of the pore plate, so that the central circular hole of the pore plate can not generate deformation, and the measuring accuracy is ensured.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The utility model discloses metal pipe float flowmeter's flow detection device, by surveying buret upper end flange 1a, survey buret lower extreme flange 1b, orifice plate 2, awl float 3, go up spacing seat 4, down spacing seat 5, inside lining 6, bush 7 constitute characterized by including surveying buret 1:

a flange 61 is arranged at the lower end of the lining 6, and the flange 61 arranged at the lower end of the lining 6 is flush matched with an inner spigot platform 1b1 arranged on a flange 1b at the lower end of the measuring pipe;

the upper end of the upper limiting seat 4 is provided with a flange 41, and the flange 41 arranged at the upper end of the upper limiting seat 4 is in flush fit with an inner spigot platform 1a1 arranged on a flange 1a at the upper end of the measuring pipe;

the upper end of the lining 6 is in fit butt joint connection with the inner thread and the outer thread of the ring sleeve part 42 of the upper limiting seat 4; the lining 6 and the upper limiting seat 4 form an I-shaped anticorrosive layer in the measuring pipe 1;

an inner spigot groove 62 is formed in the lower part of the lining 6, and the lower limiting seat 5 is in threaded fit, positioning and fixing with the inner spigot groove 62 formed in the lower part of the lining 6, so that the lower limiting seat 5 is fixedly arranged in the lining 6;

an inner spigot platform 63 is arranged in the middle of the lining 6, a flange 21 is arranged at the upper end of the U-shaped pore plate 2, the flange 21 arranged at the upper end of the pore plate 2 is matched and positioned with the inner spigot platform 63 arranged in the middle of the lining 6, a bushing 7 is arranged between the lower end of the ring sleeve part 42 of the upper limiting seat 4 and the flange 21 arranged at the upper end of the pore plate 2, and the bushing 7 axially positions the pore plate 2;

a positioning hole 51 is formed in the center of the lower limiting seat 5, and the lower end guide rod 31 of the conical floater 3 is in sliding fit with the positioning hole 51 formed in the center of the lower limiting seat 5;

a positioning guide cylinder 43 is arranged at the center of the upper limiting seat 4, and the upper end guide rod 32 of the cone floater 3 is in sliding fit with a positioning guide cylinder 42 arranged at the center of the upper limiting seat 4.

Claims

1. The flow detection device of the metal pipe float flowmeter comprises a measuring pipe, a measuring pipe upper end flange, a measuring pipe lower end flange, a pore plate, a cone float, an upper limiting seat, a lower limiting seat, a lining and a lining, and is characterized in that: