CN203337292U - Flow guide device of ultrasonic heat meter - Google Patents

Abstract

The utility model discloses a flow guide device of an ultrasonic heat meter, and the device is embedded at a side of a water inlet inside the housing of the ultrasonic heat meter. The device comprises an annular housing (1) which is matched with an inner wall of the ultrasonic heat meter, a cross-shaped flow guide plate (2) which is disposed inside the annular housing (1), and a straight-shaped flow guide pillar (3) which is perpendicular to the plane where the cross-shaped flow guide plate (2) is located. The straight-shaped flow guide pillar (3) is connected with the axle center of the cross-shaped flow guide plate (2). Or the flow guide device comprises the annular housing (1) which is matched with the inner side of the ultrasonic heat meter, and a square-shaped flow guide plate (4) inside the annular housing (2). According to the utility model, the cross-shaped and straight-shaped flow guide plates, or the square-shaped flow guide plate is employed and placed at a side, at which an energy converter is installed, of the housing. The flow guide plates can prevent a fluid water hammer from impacting the energy converter to cause instable metering, thereby enabling a water flow in the housing to flow along a center line at a constant speed.

Description

A kind of ultrasonic calorimeter guiding device

Technical field

The utility model relates to ultrasonic calorimeter, the guiding device in ultrasonic calorimeter especially, specifically a kind of simple in structure, ultrasonic calorimeter guiding device that water conservancy diversion is effective.

Background technology

At present, the hot Cold quantity measurement that discharges or absorb when ultrasonic calorimeter is used for measuring heating, be more fast-selling in recent years Novel meter.Because it has non-contact measurement, measures broad quantum, the advantages such as simple, long service life are installed are widely used in the industry fields such as petrochemical complex resident heating.

Ultrasonic calorimeter flow measurement principle as shown in Figure 1, has two transducers in ultrasonic calorimeter, following current transducer and adverse current transducer, and two transducers are arranged on respectively the both sides of fluid pipeline section, and leave certain distance.The interior diameter of pipeline section is D, and the path of ultrasound wave walking is L, and the ultrasound wave following current time is the T upstream, and the adverse current time is the T downstream, and the flow direction angle of hyperacoustic direction of propagation and fluid is θ, and the flowing velocity of fluid is V.Because fluid flows, make the ultrasound wave time that the following current travel-time propagates than adverse current on the distance apart from for L short.Its mistiming can mean with following formula

* wherein C is the speed of sound at water transmission.

Following current travel-time and adverse current propagation time difference are so:

Due to the speed of fluid, with respect to ultrasound wave, the velocity of propagation in water is very little, therefore above formula is reduced to:

$\mathrm{\&Delta;T}\&ap;\frac{2\mathrm{VL}\cos \mathrm{\&theta;}}{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HDA00002918363600021.png"\; state="\{\{state\}\}">C</figure-callout>}}^2}$

Thereby we obtain the speed of fluid and the linear formula of propagation time difference:

$V=\frac{{\mathrm{<figure-callout\; id="2"\; label="C"\; filenames="HDA00002918363600021.png"\; state="\{\{state\}\}">C</figure-callout>}}^2\mathrm{\&Delta;T}}{2L\cos \mathrm{\&theta;}}$

Wherein: V is fluid is a desirable direction of propagation along the velocity of propagation of pipe centerline.But because the small-bore ultrasonic calorimeter that family is used at present considers that bore is little, propagation distance L is short.Therefore the convection cell propagation speed differential has proposed higher accuracy requirement.Speed V can at the uniform velocity propagate and become the key overcome the above problems along the pipeline section center so.

Usually use guiding device guiding flow direction in ultrasonic calorimeter, when the environment difference of using due to user installation is difficult to guarantee that fluid enters the flow housing, direction is parallel at the uniform velocity propagates along pipe centerline.Will cause so the actual propagation route of fluid not identical with the fixedly propagation distance of flow housing, easily produce error.

Summary of the invention

The purpose of this utility model be the environment difference used for user installation direction is parallel while being difficult to guarantee that fluid enters the flow housing at the uniform velocity along pipe centerline, propagates, easily produce the problem of error, a kind of ultrasonic calorimeter guiding device is proposed.

The technical solution of the utility model is:

A kind of ultrasonic calorimeter guiding device, be embedded in a side of water inlet in the ultrasonic calorimeter housing, it comprises ring-shaped shell, " ten " the font fair water fin in ring-shaped shell and " one " font diversion column vertical with plane, " ten " font fair water fin place agreed with the ultrasonic calorimeter inwall, should with the axle center of " ten " font fair water fin, be connected by " one " font diversion column.

The thickness of " ten " of the present utility model font fair water fin is 8-12mm.

The length of " one " of the present utility model font diversion column is 16-20mm.

A kind of ultrasonic calorimeter guiding device, be embedded in a side of water inlet in the ultrasonic calorimeter housing, and it comprises the ring-shaped shell that agrees with the ultrasonic calorimeter inwall and the pattern fair water fin in ring-shaped shell.

The thickness of ring-shaped shell of the present utility model is 9-10mm, and the thickness of pattern fair water fin is 4-6mm.

The beneficial effects of the utility model:

The utility model adopts " ten " font to add " one " font fair water fin." one " font diversion column combines, and is sidelong the side that transducer is installed at housing, and it can avoid fluid " water hammer " impact transducer to cause metering unstable." ten " font fair water fin can play a good rectified action to " eddy current ", " water hammer ", " lateral deviation stream ".Make the current that enter housing there is the effect of at the uniform velocity propagating along center line.Because the large choke preventing function of plate hole spacing is good, be applicable to contain the impurity liquid pipeline and install and use in addition.

The utility model adopts intensive pattern fair water fin, and convection cell " eddy current ", " water hammer ", " lateral deviation stream " play a better rectified action.Make the current that enter housing there is the effect of at the uniform velocity propagating along center line.Can select different hole count designs to meet the crushing requirement according to different bores.Also there is the function of impurity screening, be applicable to impure few network of pipelines, for impure many network of pipelines, want periodic cleaning simultaneously.

The accompanying drawing explanation

Fig. 1 is the structural representation of ultrasonic calorimeter.

Fig. 2 is one of structural representation of the present utility model.

Fig. 3 is the A-A cross-sectional view of Fig. 2.

Fig. 4 is two of structural representation of the present utility model.

Fig. 5 is the A-A cross-sectional view of Fig. 4.

Embodiment

Below in conjunction with drawings and Examples, the utility model is further described.

As shown in Figure 2,3, a kind of ultrasonic calorimeter guiding device, be embedded in a side of water inlet in the ultrasonic calorimeter housing, it comprises ring-shaped shell 1, " ten " font fair water fin 2 in ring-shaped shell 1 and " one " font diversion column 3 vertical with plane, " ten " font fair water fin place agreed with the ultrasonic calorimeter inwall, should with the axle center of " ten " font fair water fin 2, be connected by " one " font diversion column 3.

The thickness of " ten " of the present utility model font fair water fin 2 is 8-12mm.

The length of " one " of the present utility model font diversion column 3 is 16-20mm.

The utility model adopts " ten " font to add " one " font fair water fin." one " font diversion column combines, and is sidelong the side that transducer is installed at housing, and it can avoid fluid " water hammer " impact transducer to cause metering unstable." ten " font fair water fin can play a good rectified action to " eddy current ", " water hammer ", " lateral deviation stream ".Make the current that enter housing there is the effect of at the uniform velocity propagating along center line.Because the large choke preventing function of plate hole spacing is good, be applicable to contain the impurity liquid pipeline and install and use in addition.

As shown in Figure 4,5, a kind of ultrasonic calorimeter guiding device, be embedded in a side of water inlet in the ultrasonic calorimeter housing, and it comprises the ring-shaped shell 1 that agrees with the ultrasonic calorimeter inwall and the pattern fair water fin 4 in ring-shaped shell 1; The thickness of ring-shaped shell 3 is 9-10mm, and the thickness of pattern fair water fin 3 is 4-6mm.

The utility model adopts intensive pattern fair water fin, and convection cell " eddy current ", " water hammer ", " lateral deviation stream " play a better rectified action.Make the current that enter housing there is the effect of at the uniform velocity propagating along center line.Can select different hole count designs to meet the crushing requirement according to different bores.Also there is the function of impurity screening, be applicable to impure few network of pipelines, for impure many network of pipelines, want periodic cleaning simultaneously

The utility model does not relate to partly all prior aries that maybe can adopt same as the prior art to be realized.

Claims (5)

1. a ultrasonic calorimeter guiding device, be embedded in a side of water inlet in the ultrasonic calorimeter housing, it is characterized in that it comprises ring-shaped shell (1), " ten " font fair water fin (2) in ring-shaped shell (1) and " one " font diversion column (3) vertical with plane, " ten " font fair water fin place agreed with the ultrasonic calorimeter inwall, should be connected with the axle center of " ten " font fair water fin (2) by " one " font diversion column (3).

2. ultrasonic calorimeter guiding device according to claim 1, the thickness that it is characterized in that described " ten " font fair water fins (2) is 8-12mm.

3. ultrasonic calorimeter guiding device according to claim 1, the length that it is characterized in that described " one " font diversion column (3) is 16-20mm.

4. a ultrasonic calorimeter guiding device, be embedded in a side of water inlet in the ultrasonic calorimeter housing, it is characterized in that it comprises ring-shaped shell (1) and the interior pattern fair water fin (4) of ring-shaped shell (1) agreed with the ultrasonic calorimeter inwall.

5. ultrasonic calorimeter guiding device according to claim 4, the thickness that it is characterized in that described ring-shaped shell (3) is 9-10mm, the thickness of pattern fair water fin (3) is 4-6mm.

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