CN212482578U

CN212482578U - Porous float flowmeter

Info

Publication number: CN212482578U
Application number: CN202021768820.2U
Authority: CN
Inventors: 白青松; 陈丽亚; 张占林; 许秀景
Original assignee: CHENGDE FISCHER-PORTER AUTOMATION EQUIPMENT CO LTD
Current assignee: CHENGDE FISCHER-PORTER AUTOMATION EQUIPMENT CO LTD
Priority date: 2020-08-22
Filing date: 2020-08-22
Publication date: 2021-02-05
Anticipated expiration: 2030-08-22

Abstract

The utility model relates to the technical field of float flowmeters, in particular to a multi-hole float flowmeter which is suitable for measuring the flow of large-caliber and large-flow liquid, gas and steam; the device is suitable for fluid flow measurement on occasions with insufficient upstream and downstream straight pipe sections on site; the fluid state can be balanced, the permanent pressure loss of the instrument is reduced, and the energy-saving effect is excellent; the integrated design is adopted, the installation and maintenance are convenient, and the field metering and control are convenient; the method comprises the following steps: the multi-hole balance flow sensor comprises two groups of first flanges, a multi-hole balance throttling piece and a measuring pipe, wherein the two groups of first flanges are respectively arranged at the input end and the output end of the measuring pipe; the input end of the upstream pressure guiding pipeline is communicated and arranged on the measuring pipe and is positioned on one side of the porous balance throttling element; and a downstream pressure-inducing pipeline.

Description

Porous float flowmeter

Technical Field

The utility model relates to a float flowmeter's technical field especially relates to a porous formula float flowmeter.

Background

The traditional metal tube float flowmeter is generally suitable for measuring small-caliber and small-flow fluid, the general caliber does not exceed DN100, and the application range of the flowmeter is greatly limited. For the measurement of large-caliber and large-flow fluid flow, some instrument manufacturers develop a shunt float flowmeter for widening the caliber application range of the float flowmeter.

The working principle of the split-flow float flowmeter is as follows: the fluid filling the pipeline flows through the orifice plate of the pipeline, the fluid flow forms local contraction at the orifice plate, so that the flow velocity is increased, the static pressure is reduced, and then a static pressure difference delta P (or differential pressure) is generated before and after the throttling element. The greater the flow velocity of the fluid, the greater the differential pressure generated before and after the orifice. Based on the measurement principle of the float flowmeter, the float can generate vertical linear motion as long as the differential pressure between the upstream and downstream of the float is large enough, so that the total flow passing through the pipeline can be indicated, and the measurement purpose is achieved.

The split-flow float flowmeter enlarges the aperture range of the float flowmeter, the orifice plate is basically selected as the throttling element in the current market, the cost is low, the throttling effect can basically meet the requirement of generating differential pressure, but the vortex effect is large, the permanent pressure loss is large, meanwhile, the requirements of the straight pipe sections of the upstream and the downstream are high, generally at least 10D at the upstream and 5D at the downstream (D is the diameter of a pipeline), so that the flow state is stable, the differential pressure is stable, the accurate, stable and reliable measurement effect of the float flowmeter is achieved, and in practice, under many situations on site, the installation can not be met, and the measurement effect is not ideal.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a measuring device which is suitable for measuring the flow of large-caliber large-flow liquid, gas and steam; the device is suitable for fluid flow measurement on occasions with insufficient upstream and downstream straight pipe sections on site; the fluid state can be balanced, the permanent pressure loss of the instrument is reduced, and the energy-saving effect is excellent; the multi-hole float flowmeter has an integrated design, is convenient to install and maintain, and is convenient for field metering and control.

The utility model discloses a porous formula float flowmeter, include:

the multi-hole balance flow sensor comprises two groups of first flanges, a multi-hole balance throttling piece and a measuring pipe, wherein the two groups of first flanges are respectively arranged at the input end and the output end of the measuring pipe;

the input end of the upstream pressure guiding pipeline is communicated and arranged on the measuring pipe and is positioned on one side of the porous balance throttling element;

the output end of the downstream pressure guiding pipeline is communicated and arranged on the measuring pipe and is positioned on the other side of the porous balance throttling element;

the float flowmeter is communicated and installed between the output end of the upstream pressure-inducing pipeline and the input end of the downstream pressure-inducing pipeline, and measures the flow of fluid passing through the upstream pressure-inducing pipeline and the downstream pressure-inducing pipeline;

and the flow-limiting orifice plate is arranged between the float flowmeter and the downstream pressure-leading pipeline and limits the flow of the fluid.

The utility model discloses a porous formula float flowmeter, pressure pipe and third flange are drawn after the upper reaches are drawn pressure pipeline and are pressed pipe, second valve before the second valve, and the input and the porous balanced flow sensor intercommunication of pressure pipe are drawn before the second valve, and the intercommunication is provided with the second stop valve on the pressure pipe before the second valve to draw pressure pipe intercommunication behind the output of second stop valve and the second valve, the output of drawing the pressure pipe behind the second valve passes through the third flange intercommunication and installs the input at float flowmeter.

The utility model discloses a porous formula float flowmeter, low reaches are drawn and are pressed the pipeline and include before the first valve to draw behind pipe, first stop valve, the first valve to press pipe and second flange, draw before the first valve to press the output and the porous balanced flow sensor intercommunication of pipe, draw before the first valve to press and press the pipe and go up the intercommunication and be provided with first stop valve, draw behind the input of first stop valve and the first valve to press the pipe intercommunication, draw behind the first valve to press the input of pipe to pass through the input of second flange intercommunication and install at float flowmeter.

The utility model discloses a porous formula float flowmeter, the current-limiting orifice plate includes the orifice plate, is provided with the trompil on the orifice plate to the orifice plate intercommunication is installed and is drawn between pressure pipeline and the float flowmeter in low reaches, is provided with the handle on the orifice plate.

The utility model discloses a porous formula float flowmeter, the upper reaches are drawn and are provided with the blow off pipe on the pipeline and carry out the blowdown through the blow off pipe.

The utility model has the advantages that:

1. the device is suitable for measuring the flow of large-caliber and large-flow liquid, gas and steam;

2. the device is suitable for fluid flow measurement on occasions with insufficient upstream and downstream straight pipe sections on site;

3. the fluid state can be balanced, the permanent pressure loss of the instrument is reduced, and the energy-saving effect is excellent;

4. the integrated design, the installation is maintained conveniently, the on-the-spot measurement of being convenient for, management and control.

Drawings

Fig. 1 is a schematic view of the present invention;

FIG. 2 is a schematic diagram of a porous balanced flow sensor;

FIG. 3 is a schematic illustration of an upstream pilot line;

FIG. 4 is a schematic view of a downstream pilot line;

FIG. 5 is a schematic view of a restriction orifice plate;

in the drawings, the reference numbers: 1. a porous balanced flow sensor; 11. a first flange; 12. a porous balanced throttle; 13. a measurement tube; 2. a downstream pressure introduction line; 21. a first valve front pressure leading pipe; 22. a first shut-off valve; 23. a first valve rear pressure leading pipe; 24. a second flange; 3. a restriction orifice plate; 31. an orifice plate; 32. a handle; 4. a float flow meter; 5. an upstream pressure introduction line; 51. a pressure leading pipe before the second valve; 52. a second stop valve; 53. a pressure pipe is led behind the second valve; 54. a third flange; 6. a blowoff valve.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 to 5, the utility model discloses a porous float flowmeter, include:

the multi-hole balance flow sensor comprises a multi-hole balance flow sensor 1, wherein the multi-hole balance flow sensor 1 comprises two groups of first flanges 11, a multi-hole balance throttling piece 12 and a measuring pipe 13, the two groups of first flanges 11 are respectively arranged at the input end and the output end of the measuring pipe 13, and the multi-hole balance throttling piece 12 is transversely arranged inside the measuring pipe 13 and rectifies fluid passing through the inside of the measuring pipe 13;

the input end of the upstream pressure guiding pipeline 5 is communicated and installed on the measuring pipe 13 and is positioned on one side of the porous balance throttling element 12;

the output end of the downstream pressure leading pipeline 2 is communicated and arranged on the measuring pipe 13 and is positioned on the other side of the porous balance throttling element 12;

a float flow meter 4, the float flow meter 4 being installed in communication between an output end of the upstream pressure introduction line 5 and an input end of the downstream pressure introduction line 2, and the float flow meter 4 measuring a flow rate of the fluid passing through the upstream pressure introduction line 5 and the downstream pressure introduction line 2;

and the flow restriction orifice plate 3 is arranged between the float flowmeter 4 and the downstream pressure guide pipeline 2 and restricts the flow of the fluid.

The utility model discloses a porous formula float flowmeter, pressure pipeline 51 is drawn before the upper reaches draw pressure pipeline 5 includes the second valve, draw behind the second valve and press pipe 53 and third flange 54, draw pressure pipe 51's input and porous balanced flow sensor 1 intercommunication before the second valve, draw before the second valve and press pipe 51 to go up the intercommunication and be provided with second stop valve 52 to draw pressure pipe 53 intercommunication behind the output of second stop valve 52 and the second valve, the output that draws pressure pipe 53 behind the second valve passes through the input that third flange 54 intercommunication was installed at float flowmeter 4.

The utility model discloses a porous formula float flowmeter, low reaches are drawn and are pressed pipeline 2 and are drawn pressure pipe 21 before including first valve, first stop valve 22, draw pressure pipe 23 and second flange 24 behind the first valve, draw pressure pipe 21's output and porous balanced flow sensor 1 intercommunication before the first valve, draw before the first valve and press the pipe 21 to go up the intercommunication and be provided with first stop valve 22, draw pressure pipe 23 intercommunication behind first stop valve 22's the input and the first valve, draw behind the first valve and press the pipe 23's input to pass through second flange 24 intercommunication and install the input at float flowmeter 4.

The utility model discloses a porous formula float flowmeter, current-limiting orifice plate 3 include orifice plate 31, are provided with the trompil on the orifice plate 31 to orifice plate 31 intercommunication is installed and is drawn between pressure pipeline 2 and float flowmeter 4 in low reaches, is provided with handle 32 on the orifice plate 31.

The utility model discloses a porous formula float flowmeter, the upper reaches are drawn and are pressed and be provided with blow off pipe 6 on the pipeline 5 and carry out the blowdown through blow off pipe 6.

The first flange 11, the porous balance throttling element 12 and the measuring pipe 13 in the porous balance flow sensor 1 are reasonably selected according to physical property parameters, process parameters and the like of a medium, flange forms, pipeline wall thicknesses and throttling element sizes, and measurement of fluid flow of liquid, gas, steam and the like is met.

The first flange 11, the porous balance throttling element 12 and the measuring pipe 13 in the porous balance flow sensor 1 are in welded connection, no movable part is provided, and safety and reliability are achieved.

The porous balance throttling element 12 in the porous balance flow sensor 1 is a patent product, and the patent number ZL201120472412.7 porous balance throttling element rapidly rectifies a flow field into approximate ideal fluid through a symmetrical porous design on the porous balance throttling element, eliminates a dead zone effect caused by throttling of only one hole, greatly reduces eddy current in a pressure taking region, greatly reduces permanent pressure loss, has a good energy-saving effect, simultaneously reduces the requirements of upstream and downstream straight pipe sections of the throttling element, and can achieve stable flow state by the upstream straight pipe section 3D and the downstream straight pipe section 1D, thereby meeting the insufficient requirements of the upstream and downstream straight pipe sections on site.

The design of the porous balance throttling element 12 greatly improves the signal-to-noise ratio of differential pressure signals detected by the pressure taking ports on the upstream side and the downstream side of the throttling element, thereby greatly improving the stability of differential pressure and ensuring the accuracy, stability and reliability of measurement of the float flowmeter.

The pressure leading pipe 21 in front of the first valve is welded with the pressure leading hole at the downstream of the porous balance throttling piece 12 in the porous balance flow sensor 1, and the second flange 24 is connected and sealed with the float flowmeter 4 through a bolt fastener and a sealing gasket.

The flow-limiting orifice plate 3 comprises an orifice plate 31 and a handle 32. The opening size is calculated according to the pipeline flow and the specification of the selected float flowmeter, the measurement requirement of the range of the float flowmeter is met, and the smaller the specification of the float flowmeter is, the smaller the opening size of the pore plate is.

The float flowmeter 4 can be a glass tube float flowmeter, a micro-flow metal tube float flowmeter or a standard metal tube float flowmeter according to fluid physical property parameters, process parameters and the like, the caliber is usually not more than DN25, pressure loss is not easy to be overlarge, and the float flowmeter is connected with a pressure guide pipeline and generally adopts the forms of threaded connection, sleeve connection, flange connection and the like.

The second pre-valve pressure leading pipe 51 is welded with the upstream pressure leading hole of the porous balance throttle element 12 in the porous balance flow sensor 1, and the third flange 54 is connected and sealed with the float flowmeter 4 through a bolt fastener and a sealing gasket.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A multi-orifice float flow meter comprising:

the multi-hole balance flow sensor (1), the multi-hole balance flow sensor (1) comprises two groups of first flanges (11), a multi-hole balance throttling piece (12) and a measuring pipe (13), the two groups of first flanges (11) are respectively installed at the input end and the output end of the measuring pipe (13), the multi-hole balance throttling piece (12) is transversely installed inside the measuring pipe (13) and rectifies fluid passing through the inside of the measuring pipe (13);

the input end of the upstream pressure guiding pipeline (5) is communicated and arranged on the measuring pipe (13) and is positioned on one side of the porous balance throttling element (12);

the output end of the downstream pressure guiding pipeline (2) is communicated and installed on the measuring pipe (13) and is positioned on the other side of the porous balance throttling element (12);

the float flowmeter (4), the float flowmeter (4) is installed between the output end of the upstream pressure-leading pipeline (5) and the input end of the downstream pressure-leading pipeline (2) in a communicating mode, and the float flowmeter (4) measures the flow of the fluid passing through the upstream pressure-leading pipeline (5) and the downstream pressure-leading pipeline (2);

and the flow limiting orifice plate (3) is arranged between the float flowmeter (4) and the downstream pressure guide pipeline (2) and limits the flow of the fluid.

2. The porous float flowmeter of claim 1, characterized in that the upstream pressure-leading pipeline (5) comprises a second valve front pressure-leading pipe (51), a second valve rear pressure-leading pipe (53) and a third flange (54), the input end of the second valve front pressure-leading pipe (51) is communicated with the porous balance flow sensor (1), a second stop valve (52) is communicated with the second valve front pressure-leading pipe (51), the output end of the second stop valve (52) is communicated with the second valve rear pressure-leading pipe (53), and the output end of the second valve rear pressure-leading pipe (53) is communicated with the input end of the float flowmeter (4) through the third flange (54).

3. The porous float flowmeter as claimed in claim 1, wherein the downstream pressure leading pipeline (2) comprises a first valve front pressure leading pipe (21), a first stop valve (22), a first valve rear pressure leading pipe (23) and a second flange (24), the output end of the first valve front pressure leading pipe (21) is communicated with the porous balanced flow sensor (1), the first stop valve (22) is communicated with the first valve front pressure leading pipe (21), the input end of the first stop valve (22) is communicated with the first valve rear pressure leading pipe (23), and the input end of the first valve rear pressure leading pipe (23) is communicated with the input end of the float flowmeter (4) through the second flange (24).

4. The multi-orifice float flowmeter of claim 1, characterized in that the restriction orifice (3) comprises an orifice (31), the orifice (31) is provided with openings, and the orifice (31) is installed in communication between the downstream pressure-inducing line (2) and the float flowmeter (4), and the orifice (31) is provided with a handle (32).

5. The multi-hole float flowmeter as claimed in claim 2, wherein the upstream pressure-inducing pipe (5) is provided with a drain pipe (6) and the drain is performed through the drain pipe (6).