CN213239054U

CN213239054U - Orifice plate

Info

Publication number: CN213239054U
Application number: CN202022607949.1U
Authority: CN
Inventors: 马世勋
Original assignee: Jinan Shizhong Automation Instrument Co ltd
Current assignee: Jinan Shizhong Automation Instrument Co ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-05-18
Anticipated expiration: 2030-11-12

Abstract

The utility model discloses a pore plate, including surveying buret, it has pore plate orifice fitting to inlay in the survey buret, orifice plate orifice fitting is provided with the eccentric orfice, is provided with on the survey buret and just gets pressure hole and negative pressure hole, surveys buret outside top and is connected with I-shaped triplex group, I-shaped triplex group and just getting pressure hole and negative pressure hole intercommunication I-shaped triplex group top intercommunication have many parameter differential pressure and pressure transmitter, the both ends of surveying buret are connected with the extension pipe respectively, the extension pipe that is located survey buret rear end is connected with temperature sensor, the both ends of extension pipe all are provided with flange. The orifice of the throttling element of the orifice plate is arranged at the position below the central line, so that the purpose of accurate measurement can be achieved when gas or steam containing a small amount of fluid with particles or a small amount of condensate is measured, and the welding and installation time is shortened by matching the multi-parameter differential pressure and the pressure transmitter with the orifice plate primary element without a pressure guiding joint, a pressure guiding pipe, a stop valve and an installation support. Has reliable precision and repeatability.

Description

Orifice plate

Technical Field

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

Background

In existing industrial metering schemes, standard orifice devices, such as standard orifice plates, nozzles, and venturi tubes, are used in large quantities for flow measurement. The pipe diameter requirements mostly require more than DN50, however, the measurement of small pipe diameter and tiny flow occupies a quite important position in flow measurement, and the accurate measurement of the small pipe diameter and tiny flow is always difficult to solve. The most widely used meters at present are: rotameters, positive displacement meters, and the like. From the point of view of the user, they are not ideal for industrial field applications. The accuracy of flow measurement in industry cannot be met. In addition, for fluids containing small amounts of particles or gases or vapors with small amounts of condensate, the measurement is inaccurate due to the fact that specific gravity problems can accumulate in the middle and lower portions of the cross-section of the pipe.

Disclosure of Invention

To the above problem, the utility model discloses a pore plate, this pore plate adopt interior concealed throttle structural design, and this throttling element trompil sets up the position below the central line, when measuring the gas or the steam that contain the fluid of a small amount of granule or a small amount of condensate, can reach the purpose of accurate measurement, through the cooperation of many parameter differential pressure and pressure transmitter and pore plate primary element, high integration need not draw the pressure joint, draws and presses the pipe, stop valve, and installing support to welding and installation time have been shortened. Has reliable precision and repeatability. The design with temperature and pressure compensation better ensures the measurement precision when measuring the gas medium.

The utility model provides a pore plate, includes survey buret, survey the internal surface of buret is the polished surface, it has orifice plate throttling piece to inlay in the survey buret, orifice plate throttling piece is provided with the eccentric orfice, the eccentric orfice is located the axis below of orifice plate throttling piece, it is provided with positive pressure tapping hole at orifice plate throttling piece front end to follow fluid flow direction on the survey buret, be provided with negative pressure tapping hole at orifice plate throttling piece rear end on the survey buret, survey buret outside is connected with I-shaped triple valve group above it, I-shaped triple valve group communicates with positive pressure tapping hole and negative pressure tapping hole respectively through inner channel, I-shaped triple valve group top intercommunication has many differential pressure parameter and pressure transmitter, the both ends of surveying buret are connected with the extension pipe respectively, and the extension pipe that is located survey buret rear end is connected with temperature sensor, the both ends of extension pipe all.

Preferably, the measuring tube is connected with the I-shaped valve group and the I-shaped valve group through bolts and nuts.

Preferably, a sealing ring is arranged between the multi-parameter differential pressure and pressure transmitter and the I-shaped valve group.

Preferably, the multi-parameter differential pressure and pressure transmitter is connected with the temperature sensor through a wire.

Preferably, a sealing gasket is arranged between the I-shaped valve group III and the measuring pipe.

The utility model has the advantages that:

1. high measurement precision and good long-term stability. Through the integrated connection of the multi-parameter differential pressure and the height of the pressure transmitter, the orifice plate throttling element and the measuring pipe, a pressure guiding joint, a pressure guiding pipe, a stop valve and a mounting bracket are not needed, so that the welding and mounting time is shortened. From the structure of taking warm-pressing compensation for flow measurement is more accurate.

2. For 1/2-inch, 1-inch and 11/2-inch small-caliber differential pressure flow measurement, the orifice plate reduces errors caused by inner diameter flow measurement by using a front straight pipe section and a rear straight pipe section which are subjected to inner diameter polishing treatment, and the straight pipe sections with sufficient length are used for arranging fluid distribution of fluid in a pipeline so as to improve measurement accuracy; the design of the self-centering orifice plate throttling element ensures that the center of the opening of the orifice plate throttling element and the center of the pipeline are on the same straight line, and reduces the error caused by the centering of the orifice plate throttling element.

3. The installation form is various and simple to operate, and orifice plate throttling element can not need more installation annexes, and direct and the on-the-spot process pipeline of customer directly passes through flange joint, and installation economy is convenient. Through a large amount of real flow calibration data, the precision of the orifice plate can reach 0.5 level.

4. Suitable for measuring gases or vapours of fluids containing small amounts of particles or small amounts of condensate.

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 an overall structure of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a perspective view of the present invention;

in the figure: 1. the device comprises a pore plate throttling element, 2, an I-shaped valve group, 3, a multi-parameter differential pressure and pressure transmitter, 4, a measuring pipe, 5, a positive pressure taking hole, 6, a negative pressure taking hole, 7, a connecting flange, 8 and a temperature sensor.

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 a like orifice plate shown in fig. 1-2, including orifice plate orifice fitting 1, this orifice plate orifice fitting inlays in surveying buret 4, surveys buret for interior polishing survey buret, sets up on surveying buret and just gets pressure hole 5 and negative pressure hole 6, wherein, just get the orifice plate orifice fitting left side that the pressure hole set up in fig. 1, and the negative pressure hole sets up the right side at orifice plate orifice fitting in fig. 1, installs I-shaped valves 2 above surveying buret, connects fixedly through bolt and nut. A sealing gasket is arranged between the I-shaped valve set and the measuring pipe. And a positive pressure taking channel and a negative pressure taking channel are arranged in the I-shaped valve group III and are respectively communicated with the positive pressure taking hole and the negative pressure taking hole in the measuring pipe correspondingly. And a multi-parameter differential pressure and pressure transmitter 3 is communicated above the I-shaped three-valve group. And a sealing ring is arranged between the multi-parameter differential pressure and pressure transmitter and the I-shaped valve group. Two ends of the measuring pipe are respectively connected with an extension pipe, a temperature sensor 8 is arranged on the extension pipe, the multi-parameter differential pressure and pressure transmitter is connected with the temperature sensor through an electric wire, and two ends of the extension pipe are respectively connected with a connecting flange 7.

The orifice plate adopts a design of a built-in throttling structure, and a pressure-leading joint, a pressure-leading pipe, a stop valve and an installation support are not needed for high integration through the matching of a multi-parameter differential pressure and pressure transmitter and an orifice plate primary element, so that the welding and installation time is shortened. Has reliable precision and repeatability. The design with temperature and pressure compensation better ensures the measurement precision when measuring the gas medium.

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. An orifice plate, characterized in that it comprises a measuring tube, the inner surface of which is a polished surface, a pore plate throttling piece is embedded in the measuring pipe and provided with an eccentric hole which is positioned below the axis of the pore plate throttling piece, the measuring tube is provided with a positive pressure taking hole at the front end of the orifice plate throttling element along the flowing direction of the fluid, the measuring tube is provided with a negative pressure taking hole at the rear end of the orifice plate throttling element, the measuring tube is externally connected with an I-shaped three-valve set above the measuring tube, the I-shaped three-valve set is respectively communicated with the positive pressure taking hole and the negative pressure taking hole through an internal channel, the multi-parameter differential pressure and pressure transmitter is communicated above the I-shaped three-valve group, two ends of the measuring pipe are respectively connected with an extension pipe, the extension pipe positioned at the rear end of the measuring pipe is connected with a temperature sensor, and two ends of the extension pipe are respectively provided with a connecting flange.

2. The orifice plate of claim 1, wherein the measurement tube is bolted to the valve block.

3. The orifice plate of claim 1, wherein a sealing ring is disposed between the multi-parameter differential pressure and pressure transmitter and the tri-valve block.

4. The orifice plate of claim 1, wherein the multi-parameter differential pressure and pressure transmitter is wired to the temperature sensor.

5. The orifice plate of claim 1, wherein a sealing gasket is disposed between the valve block and the measurement tube.