CN211904246U

CN211904246U - Balance flowmeter with temperature and pressure compensation

Info

Publication number: CN211904246U
Application number: CN202020844307.0U
Authority: CN
Inventors: 马世勋
Original assignee: Jinan Shizhong Automation Instrument Co ltd
Current assignee: Jinan Shizhong Automation Instrument Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-11-10
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses a from balanced flowmeter of taking warm-pressing compensation, which comprises a transmitter, the changer is connected with three valves, three valves are connected with the socket joint and weld the gate valve, the socket joint is welded the gate valve and is two, and first socket joint is welded the gate valve intercommunication and has just to get and press the pipe, and second socket joint is welded the gate valve intercommunication and has the negative to get and press the pipe, just get and press the pipe and get the common intercommunication of pipe and have survey buret, survey the inherent positive pressure of buret and get and install the balance piece of band-pass hole between the pipe, survey buret and still install temperature sensor. The flowmeter gets rid of the defect that the temperature change influences the measurement precision in the flow measurement of the existing balance flowmeter, so that the measurement precision of the integrated balance flowmeter is higher.

Description

Balance flowmeter with temperature and pressure compensation

Technical Field

The utility model relates to a flow detection field especially relates to a can realize balanced flowmeter of warm-pressing compensation integration in pipeline.

Background

The balance flowmeter is a revolutionary differential pressure type flow meter, the working principle of the balance flowmeter is the same as that of other differential pressure type flowmeters, the balance flowmeter is based on the energy conversion principle in a sealed pipeline, and the flow in the pipeline is in direct proportion to the square root of differential pressure under the condition of ideal fluid; the flow in the pipeline can be calculated according to the Bernoulli equation by measuring the differential pressure value. Although the existing balance flowmeter can calculate the flow in the pipeline, the balance flowmeter has the following defects when measuring the flow of the pipeline:

when the flow rate of the pipeline is measured, the temperature and the pressure of a medium in the pipeline are not constant, particularly when the gas medium is measured, the density of the gas is changed due to the change of the temperature and the pressure, the accuracy of the flow rate measurement of the balance flowmeter is related to the density, and the density is changed, so that the measurement error is increased. When measuring the flow, the straight pipe section that needs the sufficient length in the measurement satisfies the installation requirement, and the straight pipe section that actual energy pipeline often does not have the sufficient length leads to the measuring error grow.

Disclosure of Invention

In view of the above problem, the utility model discloses a from balanced flowmeter of taking warm-pressing compensation, temperature variation influences measurement accuracy's drawback when this flowmeter has broken away from current balanced flowmeter flow measurement, makes integrative balanced flowmeter's measurement accuracy higher.

The utility model provides a from balanced flowmeter of taking temperature and pressure compensation, includes the changer, the changer is connected with three valves, three valves are connected with the socket joint and weld the gate valve, the socket joint is welded the gate valve and is two, and first socket joint is welded the gate valve intercommunication and has positive pressure pipe, and second socket joint is welded the gate valve intercommunication and has negative pressure pipe, positive pressure pipe and negative pressure pipe common intercommunication have survey buret, survey the intraductal positive pressure pipe of surveying and install the balance piece of band-pass hole between the pressure pipe is got to the negative pressure, survey buret and still install temperature sensor.

Preferably, the balance piece is provided with a plurality of through holes.

Preferably, the axis of the through-hole is arranged parallel to the measuring tube axis.

Preferably, the axis of the positive pressure taking pipe and the axis of the negative pressure taking pipe are arranged in parallel, and the axis of the positive pressure taking pipe and the axis of the negative pressure taking pipe are both perpendicular to the axis of the measuring pipe.

Preferably, a sealing ring is arranged between the transmitter and the three valve groups.

Preferably, the three valve groups are connected with the socket welding gate valve through threaded joints.

Preferably, a sealing gasket is arranged between the three valve groups and the threaded joint.

Preferably, the transmitter is a multi-parameter differential pressure and pressure transmitter.

Preferably, the two ends of the measuring tube are communicated with the pipeline to be measured through bolts and nuts.

Preferably, a metal winding gasket is arranged between the measuring tube and the pipeline to be measured.

The utility model has the advantages that:

1. the measurement precision is high

The differential pressure transmitter and the temperature sensor are integrally designed, the balance sheet with the through hole can balance a flow field, reduce eddy current, vibration and signal noise, greatly improve the stability of the flow field, and the meter body adopts a specially-made precise pipeline and a special pressure taking device, so that the accuracy is improved by 5-10 times compared with the traditional throttling device. When the fluid is measured, the temperature sensor, the differential pressure sensor and the pressure sensor are integrally designed, so that the precision of the accurate sensor with higher measuring precision can reach +/-0.2%, and the method is suitable for any trade measuring occasion.

2. Without straight pipe section requirement

The unique design of the self-contained measuring tube and the porous balance sheet of the balance flowmeter can balance and adjust the flow field stably without a straight tube section. Especially for special or expensive pipelines, a large number of straight pipe sections can be saved by adopting integrated temperature and pressure compensation balance flow, so that the expensive cost is saved.

3. Low permanent pressure loss

The symmetrical balance design of the positive and negative pressure taking pipes of the balance flowmeter reduces the formation of vortex and turbulent friction, reduces the loss of kinetic energy, and compared with the traditional throttling device, the pressure loss is reduced by 70 percent under the same working condition, is close to a Venturi tube, thereby saving considerable operating cost and being worth of popularization.

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 a perspective view of the present invention;

in the figure: 1. the multi-parameter differential pressure and pressure transmitter comprises a multi-parameter differential pressure and pressure transmitter, 2, a three-valve group, 3, a threaded joint, 4, a socket welding gate valve, 5, a positive pressure taking pipe, 6, a negative pressure taking pipe, 7, a measuring pipe, 8, a balance sheet, 9, a flange, 10, a bolt, 11, a nut, 12, a temperature sensor, 13 and a pipeline to be measured.

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 from balanced flowmeter who takes warm-pressing compensation as shown in fig. 1-2, this balanced sensor is from taking one section to survey buret 7, installs temperature sensor 12 on surveying the buret, for satisfying the requirement of taking warm-pressing compensation, differential pressure transmitter and temperature sensor integrated design make its measurement more accurate. As shown in figure 1, the differential pressure transmitter is a multi-parameter differential pressure and pressure transmitter 7, the lower part of the transmitter is connected with a three-valve group 2 through a sealing ring, two threaded connectors 3 are symmetrically arranged below the three-valve group, and a sealing gasket is arranged between the three-valve group and the threaded connectors. And each threaded joint is connected with a socket welding gate valve 4, the first socket welding gate valve is communicated with a positive pressure taking pipe 5, the second socket welding gate valve is communicated with a negative pressure taking pipe 6, and the positive pressure taking pipe and the negative pressure taking pipe are communicated with a measuring pipe 7 together. A balance sheet 8 with a plurality of through holes is arranged in the measuring tube, and the axes of the through holes are parallel to the axis of the measuring tube. The balance sheet is arranged between the positive pressure taking pipe and the negative pressure taking pipe. The symmetrical balance design of the positive and negative pressure taking pipes of the balance flowmeter reduces the formation of vortex and turbulent friction, reduces the loss of kinetic energy, and reduces the pressure loss by 70 percent compared with the traditional throttling device under the same working condition. The axis of the positive pressure taking pipe and the axis of the negative pressure taking pipe are arranged in parallel, and the axis of the positive pressure taking pipe and the axis of the negative pressure taking pipe are both perpendicular to the axis of the measuring pipe. The measuring tube is also provided with a temperature sensor. And a metal winding gasket is arranged between the measuring tube and the pipeline to be measured, and the two ends of the measuring tube are communicated with the pipeline to be measured through bolts and nuts. The unique design of the self-contained measuring tube and the porous balance sheet of the balance flowmeter can balance and adjust the flow field stably without a straight tube section. Especially for special or expensive pipelines, a large number of straight pipe sections can be saved by adopting integrated temperature and pressure compensation balance flow, so that the expensive cost is saved.

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 a from balanced flowmeter of taking warm-pressing compensation, a serial communication port, including the changer, the changer is connected with three valves, three valves are connected with the socket joint and weld the gate valve, the socket joint is welded the gate valve and is two, and first socket joint is welded the gate valve intercommunication and has positive pressure pipe, and second socket joint is welded the gate valve intercommunication and has negative pressure pipe, positive pressure pipe and negative pressure pipe common intercommunication have survey buret, survey the intraductal positive pressure pipe of surveying and install the balancing piece of band-pass hole between buret and the negative pressure pipe, survey buret and still install temperature sensor.

2. The self temperature and pressure compensated balance flow meter of claim 1 wherein the balance blade is provided with a plurality of through holes.

3. The self temperature and pressure compensated balance flow meter of claim 2 wherein the axis of the through hole is parallel to the measurement tube axis.

4. The self-temperature-pressure-compensation balance flowmeter as claimed in claim 3, wherein the axis of the positive pressure-taking pipe is parallel to the axis of the negative pressure-taking pipe, and the axis of the positive pressure-taking pipe and the axis of the negative pressure-taking pipe are both perpendicular to the axis of the measuring pipe.

5. The self-temperature-pressure-compensation balance flowmeter as claimed in claim 1, wherein a sealing ring is arranged between the transmitter and the three valve groups.

6. The balance flowmeter with the temperature and pressure compensation function according to claim 1, wherein the three valve groups are connected with the socket welding gate valve through threaded joints.

7. The self-temperature-pressure-compensation balance flowmeter as claimed in claim 6, wherein a sealing gasket is arranged between the three valve groups and the threaded joint.

8. The self temperature and pressure compensated balance flow meter of claim 1 wherein the transmitter is a multi-parameter differential pressure and pressure transmitter.

9. The self-temperature-pressure-compensation balance flowmeter as claimed in claim 1, wherein the two ends of the measuring tube are connected to the pipe to be measured by bolts and nuts.

10. The self-temperature-pressure-compensating balance flow meter according to claim 9, wherein a metal wound gasket is disposed between the measuring tube and the pipe to be measured.