CN212058913U

CN212058913U - Assembled orifice flowmeter

Info

Publication number: CN212058913U
Application number: CN202021054698.2U
Authority: CN
Inventors: 马世勋
Original assignee: Jinan Shizhong Automation Instrument Co ltd
Current assignee: Jinan Shizhong Automation Instrument Co ltd
Priority date: 2020-06-10
Filing date: 2020-06-10
Publication date: 2020-12-01
Anticipated expiration: 2030-06-10

Abstract

The utility model discloses an assembled orifice plate flowmeter, including the first survey buret that connects gradually, positive pressure device, orifice plate throttling element, negative pressure device and second survey buret, positive pressure device, the one end that negative pressure device and orifice plate throttling element are connected all is provided with the dashpot, between positive pressure device and the orifice plate throttling element, all be provided with sealed the pad between negative pressure device and the orifice plate throttling element, positive pressure device, the one end that orifice plate throttling element was kept away from to the negative pressure device all is provided with the connecting groove who is used for the centering, connecting groove respectively with first survey buret, the second surveys buret and is connected with temperature sensor. The flowmeter adopts a unique design of a throttling structure with an internally-concealed orifice plate, and meets the requirements of various working conditions. The detachable structure can replace the orifice plate according to the flow change of various media, thereby ensuring the measurement precision and saving the cost.

Description

Assembled orifice flowmeter

Technical Field

The utility model relates to a flow detection field especially relates to an assembled orifice plate flowmeter in pipeline.

Background

In current industry measurement scheme, be used for measuring the little pipe diameter flowmeter of integration of gaseous differential pressure, its inlay throttle spare in inside can only satisfy a operating mode because can not dismantle, if later stage change flow, flow measurement's precision just will reduce, can only redesign calculate, change new flowmeter. From a consumer point of view, the use of the flowmeter in an industrial field is not ideal. The accuracy of flow measurements in industry cannot be maintained in response to field flow variations.

Disclosure of Invention

To the problem, the utility model discloses an assembled orifice flowmeter, this flowmeter adopt unique interior concealed orifice plate throttle structural design, satisfy multiple operating mode requirement. The detachable structure can replace the orifice plate according to the flow change of various media, thereby ensuring the measurement precision and saving the cost.

The utility model provides an assembled orifice plate flowmeter, includes the first survey buret, positive pressure taking device, orifice plate throttling element, negative pressure taking device and the second survey buret that connect gradually, the one end that positive pressure taking device, negative pressure taking device and orifice plate throttling element are connected all is provided with the dashpot, between positive pressure taking device and the orifice plate throttling element, all be provided with sealed the pad between negative pressure taking device and the orifice plate throttling element, the one end that orifice plate throttling element was kept away from to positive pressure taking device, negative pressure taking device all is provided with the connecting groove who is used for the centering, connecting groove is connected with first survey buret, second survey buret respectively, the second surveys buret and is connected with temperature sensor.

Preferably, the inner surfaces of the positive pressure measuring device, the negative pressure measuring device, the first measuring pipe and the second measuring pipe are smooth surfaces.

Preferably, the first measuring pipe and the second measuring pipe are provided with connecting flanges at the ends far away from the pressure measuring device.

Preferably, pressure measuring holes are formed in the positive pressure measuring device and the negative pressure measuring device, and the positive pressure measuring device and the negative pressure measuring device are connected with a differential pressure transmitter together.

Preferably, the positive pressure taking device and the negative pressure taking device are connected through screws and nuts.

The utility model has the advantages that:

1. high measurement precision and good long-term stability. Through the cooperation of the differential pressure transmitter and the built-in orifice plate primary element, the highly integrated flowmeter does not need a pressure guiding joint, a pressure guiding pipe, a stop valve and a mounting bracket, thereby shortening the welding and mounting time. Reliable accuracy and repeatability.

2. For 1/2-inch, 1-inch and 11/2-inch differential pressure flow measurement, the surfaces of the first measuring tube and the second measuring tube are smooth, so that errors caused by the inner diameter to the flow measurement can be reduced, and the straight tube section with enough length is used for arranging the fluid distribution of the fluid in the pipeline so as to improve the measurement accuracy; the design of self-centering of the pressure taking device and the measuring pipe ensures that the center of the hole of the pore plate and the center of the pipeline are on the same straight line, and reduces errors caused by pore plate centering.

3. The installation form is various and simple to operate, is convenient for change the throttling element when the operating mode changes, very big improvement its life practiced thrift the cost of changing the flowmeter.

4. The process pipeline is directly connected with a process pipeline on a client site through a flange, and the installation is economical and convenient. The integrated built-in orifice plate has temperature and pressure compensation and the precision can reach 0.5 level through a large amount of real flow calibration data.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a front view of the present invention;

FIG. 2 is an enlarged view of A in FIG. 1;

FIG. 3 is a cross-sectional view B-B of FIG. 1;

in the figure: 1. orifice plate throttling element, 2, differential pressure transmitter, 3, temperature sensor, 4, connecting flange, 5, measuring pipe, 6, positive pressure-taking device, 7, negative pressure-taking device, 8, external thread bolt, 9 and sealing gasket.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present invention, it should be understood that the terms "inside", "outside", "left" and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The utility model discloses an assembled orifice plate flowmeter as shown in fig. 1-3, this flowmeter will survey buret 5 and cut apart into two parts from the centre, increases the pressure taking device between the buret is surveyed to two parts, and the pressure taking device includes positive pressure taking device 6 and negative pressure taking device 7, sets up orifice plate throttling element 1 between the two pressure taking device, and two pressure taking device pass through four screw connections, with orifice plate throttling element extrusion in the middle of. Through dismantling four connecting screw, change the orifice plate throttling element between two pressure devices, realize the flow measurement under the multiple operating mode, increase the device commonality.

And the buffer grooves are formed in the ends, connected with the orifice plate throttling piece, of the positive pressure taking device and the negative pressure taking device and used for buffering air flow. Sealing gaskets 9 are arranged between the positive pressure taking device and the orifice plate throttling element and between the negative pressure taking device and the orifice plate throttling element, and are used for increasing air tightness and reducing measurement errors. And the ends of the positive pressure-taking device and the negative pressure-taking device, which are far away from the orifice plate throttling piece, are respectively provided with a connecting groove for centering, and the connecting grooves are respectively connected with the first measuring pipe and the second measuring pipe to ensure that the center of the orifice plate throttling piece is coaxial with the axis of the measuring pipe. The second measuring tube is connected with a temperature sensor.

The internal surface of pressure measuring device and survey buret is smooth surface, reduces the error that the internal diameter measured the flow and brings, surveys the both ends of buret and sets up flange 4 for be connected with the pipeline. The positive pressure measuring device and the negative pressure measuring device are both internally provided with pressure measuring holes, and are connected with the differential pressure transmitter 2 together through the pressure measuring holes.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The utility model provides an assembled orifice plate flowmeter, its characterized in that, survey buret including the first survey buret, positive pressure device, orifice plate throttling element, negative pressure device and the second that connect gradually, the one end that positive pressure device, negative pressure device and orifice plate throttling element are connected all is provided with the dashpot, between positive pressure device and the orifice plate throttling element, between negative pressure device and the orifice plate throttling element all be provided with sealed the pad, the one end that orifice plate throttling element was kept away from to positive pressure device, negative pressure device all is provided with the coupling groove who is used for the centering, coupling groove surveys buret with first survey buret, second respectively and is connected, second survey buret connection has temperature sensor.

2. The modular orifice flow meter of claim 1 in which the inner surfaces of the positive pressure pick-up, the negative pressure pick-up, the first measurement tube and the second measurement tube are smooth surfaces.

3. An assembled orifice plate flowmeter according to claim 1 wherein the ends of the first and second measurement tubes remote from the pressure-tapping means are each provided with a connecting flange.

4. The assembled orifice plate flowmeter of claim 1, wherein the positive pressure taking device and the negative pressure taking device are both provided with pressure taking holes therein, and the positive pressure taking device and the negative pressure taking device are commonly connected with a differential pressure transmitter.

5. The modular orifice flowmeter of claim 1, wherein the positive and negative pressure taps are coupled by screws and nuts.