CN103630175A - Three-stage ring-shaped flexible chain-shaped related rapid-flow measuring device - Google Patents

Abstract

The invention discloses a three-stage ring-shaped flexible chain-shaped related rapid-flow measuring device and belongs to the technical field of flow monitoring. The three-stage ring-shaped flexible chain-shaped related rapid-flow measuring device comprises a rigid equal-diameter pipeline (4), a long straight pipe (3) and a three-stage ring-shaped flexible chain-shaped signal acquisition unit (5), wherein the long straight pipe (3) is arranged on the rigid equal-diameter pipeline (4), is marked with flow-measuring depth scales (1) and incident-flow marks (2) and are internally provided with a wire guiding pipe (12); the three-stage ring-shaped flexible chain-shaped signal acquisition unit (5) is connected with an intracavity wire guiding pipe (12) at one end of the rigid equal-diameter pipeline (4) by a pipe joint (10); the three-stage ring-shaped flexible chain-shaped signal acquisition unit (5) consists of an upstream sensor (6), a mid-stream sensor (7), a downstream sensor (8) and a flexible ring-shaped chain-shaped sealing hose (9); the rigid equal-diameter pipeline (4) consists of an isolating cavity (11), an intracavity wire guiding pipe (12) and a cavity body (13) for placing a related data processor. The three-stage ring-shaped flexible chain-shaped related rapid-flow measuring device disclosed by the invention has the advantages that the structure is simple, the cost is low, and the instantaneous detection accuracy of rapid-flow fluid can be obviously improved.

Description

The relevant torrent current surveying device of the flexible chain of a kind of tertiary circulation shape

Technical field:

The present invention relates to the relevant torrent current surveying device of the flexible chain of a kind of tertiary circulation shape, be specifically related to the flexible chain correlative measurement stream of a kind of tertiary circulation shape of utilizing signal correlation to detect torrent fluid device, belong to flow monitoring technical field.

Background technology

At present in the correlative flow observation process to torrent fluid flow, the relevant current surveying device flow measurements of secondary that adopt rigid more, have the following disadvantages: 1, the percussive action of torrent easily exerts an influence to rigidity current surveying device, cause that natural frequency changes, and produces measuring error; 2, the extraneous vibration causing because of the vibration of torrent measurement environment is more obvious, has a strong impact on measuring accuracy; 3, traditional secondary correlation-measuring instrument, because the consistance of upstream and downstream signalling channel characteristic is difficult to the restriction of transit time in assurance and related operation, causes the generation of measuring error.In order to improve torrent flow measurement precision, current surveying device has larger improvement in following several respects both at home and abroad: 1, survey meter method; 2, measurement mechanism structure; 3, new material; 4, manufacture craft.

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

Summary of the invention:

The object of the invention is to overcome the deficiency that existing torrent current surveying device exists, propose the relevant torrent current surveying device of the flexible chain of a kind of tertiary circulation shape.

The relevant torrent current surveying device of the flexible chain of tertiary circulation shape of the present invention, by rigidity equal diameter pipe (4), be placed in its on rigidity equal diameter pipe (4) and 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 flexible chain signal picker of tertiary circulation shape (5) being connected with the chamber inside conductor pipe (12) of rigidity equal diameter pipe (4) one end by pipe adapter (10) forms; Wherein: the flexible chain signal picker of tertiary circulation shape (5) consists 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) consists 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) is drawn linkage record display device through the conduit (14) of long straight tube (3).

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 flexible chain signal picker of the tertiary circulation shape of current surveying device (5) forms a straight line consistent with fluid flow direction, carry out flow measurement.The associated data processors being placed in cavity (13) receives the turbulent noise signal from upstream sensor (6), middle reaches sensor (7), (8) three grades of sensors of downstream sensor, utilizes associated data processors to calculate instantaneous torrent flow velocity.

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

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

Accompanying drawing explanation:

Fig. 1 is structural representation of the present invention.

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

Embodiment:

The relevant torrent current surveying device of the flexible chain of tertiary circulation shape of the present invention, by rigidity equal diameter pipe 4, being placed in its on rigidity equal diameter pipe 4 is marked with flow measurement deep calibration 1 and meets flow label 2 and it is built-in with the long straight tube 3 of conduit 14, tertiary circulation shape flexibility chain signal picker 5 compositions that are connected with the chamber inside conductor pipe 12 of rigidity equal diameter pipe 4 one end by pipe adapter 10; Wherein: the flexible chain signal picker 5 of tertiary circulation shape consists 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 consists 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 is drawn linkage record display device through the conduit 14 of long straight tube 3.

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

Step when this device is used for flow measurement:

It is example that example be take below open water body measurement mechanism is connected in fish lead fish body, and the schematic diagram of its measuring state as shown in Figure 2.

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

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

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 _d(t), by being placed on transmission line in chain seal tube 9 to the associated data processors that is 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 _d(t) transit time τ _um, τ _md

Utilize related function $R_{\mathrm{um}}(\mathrm{\τ},T)=\frac{1}{T}{\∫}_0^T{x}_m\left(t\right)x_u(t-\mathrm{\τ})\mathrm{dt},$ 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 ${\mathrm{\τ}}_{\mathrm{um}}=\underset{\mathrm{\τ}}{\arg }(\max \left(R_{\mathrm{um}}(\mathrm{\τ},T)\right);$ Comply with again $R_{\mathrm{md}}(\mathrm{\τ},T)=\frac{1}{T}{\∫}_0^T{x}_d\left(t\right)x_m(t-\mathrm{\τ})\mathrm{dt},$ Calculate at a distance of the middle reaches of L and the transit time of downstream disturbances noise signal

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

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

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

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

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

Claims (1)

1. the relevant torrent current surveying device of the flexible chain of a tertiary circulation shape, it is characterized in that this device is by rigidity equal diameter pipe (4), be placed in its on rigidity equal diameter pipe (4) and 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 flexible chain signal picker of tertiary circulation shape (5) being connected with the chamber inside conductor pipe (12) of rigidity equal diameter pipe (4) one end by pipe adapter (10) forms; Wherein: the flexible chain signal picker of tertiary circulation shape (5) consists 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) consists 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) is drawn linkage record display device through the conduit (14) of long straight tube (3).

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