CN103630175B - A kind of three-level annular flexible chain is correlated with torrent current surveying device - Google Patents

Abstract

A kind of three-level annular flexible chain is correlated with torrent current surveying device, belongs to flow monitoring technical field.This device is by rigidity equal diameter pipe (4), be placed on rigidity equal diameter pipe (4) its be marked with flow measurement deep calibration (1) and meet flow label (2) and it is built-in with the long straight tube (3) of conduit (14), the three-level annular flexible chain signal picker (5) be connected with chamber inside conductor pipe (12) of rigidity equal diameter pipe (4) one end by pipe adapter (10) is formed; Wherein: three-level annular flexible chain signal picker (5) is made up of upstream sensor (6), middle reaches sensor (7), downstream sensor (8) and flexible annular chain seal tube (9); Rigidity equal diameter pipe (4) is by separate cavities (11), chamber inside conductor pipe (12) and place the cavity (13) of associated data processors and form.The present invention has the advantage that structure is simple, cost is low, obviously can improve the instantaneous accuracy of detection of torrent fluid.

Description

A kind of three-level annular flexible chain is correlated with torrent current surveying device

Technical field:

The present invention relates to a kind of three-level annular flexible chain to be correlated with torrent current surveying device, be specifically related to a kind of three-level annular flexible chain utilizing signal correlation to detect torrent fluid and be correlated with current surveying device, belong to flow monitoring technical field.

Background technology

At present in the correlative flow observation process of torrent fluid flow, the secondary of many employings rigid is correlated with current surveying device flow measurement, have the following disadvantages: 1, the percussive action of torrent easily has an impact to rigidity current surveying device, cause natural frequency to change, produce measuring error; 2, the extraneous vibration caused because of the vibration of torrent measurement environment is more obvious, has a strong impact on measuring accuracy; 3, traditional secondary correlation-measuring instrument, the consistance due to upstream and downstream signalling channel characteristic is difficult to the restriction of transit time in guarantee and related operation, causes the generation of measuring error.In order to improve torrent flow measurement precision, domestic and international current surveying device has larger improvement in following several respects: 1, survey meter method; 2, measurement mechanism structure; 3, new material; 4, manufacture craft.

By literature search, the relevant open report of the flow detector identical with technical solution of the present invention is not found.

Summary of the invention:

The object of the invention is to overcome the deficiency that existing torrent current surveying device exists, propose a kind of three-level annular flexible chain and to be correlated with torrent current surveying device.

Three-level annular flexible chain of the present invention is correlated with torrent current surveying device, by rigidity equal diameter pipe (4), be placed on rigidity equal diameter pipe (4) its be marked with flow measurement deep calibration (1) and meet flow label (2) and it is built-in with the long straight tube (3) of conduit (14), the three-level annular flexible chain signal picker (5) be connected with chamber inside conductor pipe (12) of rigidity equal diameter pipe (4) one end by pipe adapter (10) is formed; Wherein: three-level annular flexible chain signal picker (5) is made up of the flexible annular chain seal tube (9) of upstream sensor (6), middle reaches sensor (7), downstream sensor (8) and placement data line; Rigidity equal diameter pipe (4) is by separate cavities (11), chamber inside conductor pipe (12) and place the cavity (13) of associated data processors and form; Linkage record display device drawn by the conduit (14) of wire through long straight tube (3) of the associated data processors in cavity (13).

During flow measurement: current surveying device is positioned in torrent to meet flow label (2) vertical fluid facade direction, under the effect of torrent fluid impact, when the straight line that three-level annular flexible chain signal picker (5) formation one of current surveying device is consistent with fluid flow direction, carry out flow measurement.The associated data processors be placed in cavity (13) receives the turbulent noise signal from upstream sensor (6), middle reaches sensor (7), downstream sensor (8) three grades of sensors, utilizes associated data processors to calculate instantaneous torrent flow velocity.

The present invention's device used is that market is bought.

It is simple that the present invention has structure, and cost is low, can obviously improve instantaneous accuracy of detection in torrent fluid environment, improves the advantage of monitoring accuracy.

Accompanying drawing illustrates:

Fig. 1 is structural representation of the present invention.

Fig. 2 is the schematic diagram of measuring state of the present invention.

Embodiment:

Three-level annular flexible chain of the present invention is correlated with torrent current surveying device, by rigidity equal diameter pipe 4, be placed on rigidity equal diameter pipe 4 its be marked with flow measurement deep calibration 1 and meet flow label 2 and it is built-in with the long straight tube 3 of conduit 14, the three-level annular flexible chain signal picker 5 be connected with the chamber inside conductor pipe 12 of rigidity equal diameter pipe 4 one end by pipe adapter 10 is formed; Wherein: three-level annular flexible chain signal picker 5 is made up of the flexible annular chain seal tube 9 of upstream sensor 6, middle reaches sensor 7, downstream sensor 8 and placement data line; Rigidity equal diameter pipe 4 is made up of the cavity 13 of separate cavities 11, chamber inside conductor pipe 12 and placement associated data processors; The wire of the associated data processors in cavity 13 draws linkage record display device through the conduit 14 of long straight tube 3.

The present invention's device used is that market is bought.

This device is used for step during flow measurement:

Example is to be connected to below fish lead fish body at open water body measurement mechanism, and the schematic diagram of its measuring state as shown in Figure 2.

1, current surveying device is placed in torrent fluid, in torrent flow measurement, the current meter hanging stick of the long straight tube 3 of current surveying device with fish lead fish body is connected, on long straight tube 3 to meet flow label 2 consistent with fish lead fish head direction, current surveying device is placed in torrent fluid;

2, when the upstream sensor 6 of current surveying device, middle reaches sensor 7, downstream sensor 8 form consistent with a torrent direction of flow direction straight line under bed scour effect, flow measurement is carried out;

3, three grades of flexible annular chain collectors 5 gather the turbulent noise signal x that upstream sensor 6, middle reaches sensor 7 and downstream sensor 8 detect _u(t), x _m(t), x _dt (), by being placed on transmission line in chain seal tube 9 to the associated data processors being placed in cavity 13;

4, associated data processors calculates rate of flow of fluid;

(i) calculation perturbation noise signal x _u(t), x _m(t), x _dthe transit time τ of (t) _um, τ _md

Utilize related function t is observation time, and τ is the transit time, calculates at a distance of the upstream of L and the transit time of middle reaches turbulent noise signal comply with again calculate at a distance of the middle reaches of L and the transit time of downstream disturbances noise signal ${\mathrm{\τ}}_{md}=\underset{\mathrm{\τ}}{\arg }\left(max\right(R_{md}\left(\mathrm{\τ},T\right)\left)\right).$

(ii) torrent rate of flow of fluid v is calculated _um, v _md

$v_{um}=\frac{L}{{\mathrm{\τ}}_{um}},v_{md}=\frac{L}{{\mathrm{\τ}}_{md}}$

The requirement of sensor distance L: guarantee that torrent fluid is between upper, middle and lower trip sensor, fluid flow characteristics is stablized, and meets upstream and middle reaches sensor distance and middle reaches and downstream sensor distance and is fixed value L.

(iii) the instantaneous torrent flow velocity v in calculating observation time T

$v=\frac{1}{2}(v_{um}+v_{md}).$

Claims (1)

1. a three-level annular flexible chain is correlated with torrent current surveying device, it is characterized in that this device is by rigidity equal diameter pipe (4), be placed on rigidity equal diameter pipe (4) its be marked with flow measurement deep calibration (1) and meet flow label (2) and it is built-in with the long straight tube (3) of conduit (14), the three-level annular flexible chain signal picker (5) be connected with chamber inside conductor pipe (12) of rigidity equal diameter pipe (4) one end by pipe adapter (10) is formed; Wherein: three-level annular flexible chain signal picker (5) is made up of the flexible annular chain seal tube (9) of upstream sensor (6), middle reaches sensor (7), downstream sensor (8) and placement data line; Rigidity equal diameter pipe (4) is by separate cavities (11), chamber inside conductor pipe (12) and place the cavity (13) of associated data processors and form; Linkage record display device drawn by the conduit (14) of wire through long straight tube (3) of the associated data processors in cavity (13).