CN203455113U

CN203455113U - Ultrasonic heat meter beam pipe piece

Info

Publication number: CN203455113U
Application number: CN201320437342.0U
Authority: CN
Inventors: 石培飞; 刘壮
Original assignee: ZHEJIANG ODELI TECHNOLOGY Co Ltd
Current assignee: ZHEJIANG ODELI TECHNOLOGY Co Ltd
Priority date: 2013-07-18
Filing date: 2013-07-18
Publication date: 2014-02-26
Anticipated expiration: 2023-07-18

Abstract

The utility model relates to an auxiliary device of an ultrasonic heat meter, and aims at providing an ultrasonic heat meter beam pipe piece. The beam pipe piece is a cylindrical pipeline and is fixed on a central axis in a pipeline of the ultrasonic heat meter via a positioning locking screw. The pipe diameter of the beam pipe piece is less than the pipe diameter of the ultrasonic heat meter. Heat-carrying liquid flowing through the ultrasonic heat meter is manually accelerated, and a low flow rate is converted into a high flow rate to measure so that uniform distribution of a flow field is improved, and measuring accuracy of the heat meter is ensured. With enhancement of finish degree of the internal wall of the pipeline of the beam pipe piece, mechanical processing difficulty in enhancing the finish degree of the internal wall of the pipeline of the ultrasonic heat meter is reduced, and thus cost is reduced and difficulty is lowered and measuring accuracy of the ultrasonic heat meter is enhanced. With application of a reflecting mirror fixed on the central axis in the pipeline of the beam pipe piece with an angle of 45 degrees, a signal sent by an ultrasonic sensor is transmitted in a reflecting way, the effective signal is not easy to decay and thus the service life of the product is enhanced.

Description

A kind of ultrasonic calorimeter line pipe fitting

Technical field

The utility model is the utility appliance about ultrasonic calorimeter, particularly a kind of ultrasonic calorimeter line pipe fitting.

Background technology

Use ultrasonic measurement principle, a pair of ultrasonic sensor is directly installed on the two ends of flow sensor tube, pairing temperature sensor is arranged on respectively on the pipeline of water inlet that heat interchange goes the same way and backwater, flow sensor gathers outflow signal, pairing temperature sensor provides the temperature difference signal into water, backwater, counter gathers flow signal and temperature signal, through calculating, demonstrates the calorie value that thermal liquid discharges to outlet from entrance.

The precondition of ultrasonic sensor measuring principle is that ducted liquid flow field will be uniformly distributed, and the flow velocity of the every bit on pipeline section is all the same, and this is a kind of ideal state.Find in actual applications, in any case can not reaching, flow field is uniformly distributed, the velocity distribution in flow field not only with the thickness of flow velocity, pipeline, the roughness of the shape of pipeline, pipe surface, even also with the density of liquid in pipeline, the conditions such as kinematic viscosity of liquid are relevant.Therefore,, in practical application, being uniformly distributed completely of flow field is almost impossible, and then affects measuring accuracy.

As shown in Figure 3, when line pipe fitting is not installed, ultrasonic sensor utilizes the tube wall reflection of base table to measure, signal after ultrasonic sensor transmitting is normally with pipeline section inwall self catoptron and only have a reflection spot, after primary event refraction, signal is accepted by another ultrasonic sensor, thereby completes the communication process of a signal.But there is following problem: known according to fluidics principle, the flow velocity of fluid in pipeline is with the difference of cross-sectional distribution, its flow velocity size is also different, wherein on axis, flow velocity is the fastest, slower the closer to tube wall flow velocity, the flow velocity at tube wall place is zero, so be easy to fouling, crystallization on tube wall, accumulate over a long period like this and cause useful signal to be decayed gradually, and then it is shorter serviceable life to rely on tube wall itself to do the product of signal reflector.

Utility model content

Fundamental purpose of the present utility model is to overcome deficiency of the prior art, provides a kind of and can improve the line pipe fitting that even flow field distributes, guarantees the measuring accuracy of ultrasonic calorimeter.For solving the problems of the technologies described above, solution of the present utility model is:

A kind of ultrasonic calorimeter line pipe fitting is provided, for being arranged in the pipeline of ultrasonic calorimeter, described line pipe fitting is columniform pipeline, by positioning and locking screw, is fixed on the axis in ultrasonic calorimeter pipeline, and the caliber of line pipe fitting is less than the caliber of ultrasonic calorimeter.

As further improvement, the inner-walls of duct surface roughness Ra of described line pipe fitting is less than 1.6 μ m, and profile arithmetic average error is less than 1.6 μ m.

As further improvement, in the pipeline of described line pipe fitting, be fixed with two and be the catoptron of 45° angle with inner-walls of duct, the relative and non-parallel setting of the minute surface of two catoptrons.

Compared with prior art, the beneficial effects of the utility model are:

1, adopt line pipe fitting to adjust flow field, the thermal liquid of the ultrasonic calorimeter of flowing through is artificially accelerated, low discharge is converted into large flow and measures, improve being uniformly distributed of flow field, guarantee the measuring accuracy of hotlist;

2, by improving the inner-walls of duct smooth finish of line pipe fitting, reduced the mechanical processing difficulty producing for improving the inner-walls of duct smooth finish of ultrasonic calorimeter, thereby when reducing cost and reducing difficulty, also improved the measuring accuracy of ultrasonic calorimeter;

3, by be fixed on the catoptron on line pipe fitting pipeline axis with 45° angle, reflect the signal that transmits ultrasonic sensor transmitting, useful signal is difficult for decay, and then the serviceable life of having improved product.

Accompanying drawing explanation

Fig. 1 is scheme of installation of the present utility model.

Fig. 2 is one-piece construction schematic diagram of the present utility model.

Fig. 3 does not install the schematic diagram of line pipe fitting in ultrasonic calorimeter pipeline.

Reference numeral in figure is: 1 ultrasonic calorimeter; 2 line pipe fittings; 3 positioning and locking screws; 4 catoptrons; 5 ultrasonic sensors.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail:

As shown in Figure 1 and Figure 2, ultrasonic calorimeter line pipe fitting 2 is columniform pipeline, in the pipeline of line pipe fitting 2, be fixed with two and be the catoptron 4 of 45° angle with inner-walls of duct, relative and the non-parallel setting of the minute surface of two catoptrons 4, at the area of the interior increase catoptron 4 of line pipe fitting 2, improved the measuring accuracy of ultrasonic calorimeter 1.Line pipe fitting 2 is fixed on the axis in ultrasonic calorimeter 1 pipeline by positioning and locking screw 3, and then catoptron 4 is also on the interior axis of pipeline.The caliber of line pipe fitting 2 is D, and the caliber of ultrasonic calorimeter 1 is d, and the caliber that thermal liquid is flowed through diminishes, and the thermal liquid of the ultrasonic calorimeter 1 of flowing through is artificially accelerated, and low discharge is converted into large flow and measures, and improves being uniformly distributed of flow field.The inner-walls of duct surface roughness Ra of line pipe fitting 2 is less than 1.6 μ m, and profile arithmetic average error is less than 1.6 μ m, by improving the smooth finish of line pipe fitting 2 inwalls, can effectively improve the measuring accuracy of ultrasonic calorimeter 1.

During installation, first catoptron 4 is arranged on line pipe fitting 2 with 45° angle, then, on the ducted axis of ultrasonic calorimeter 1, uses fixedly line pipe fitting 2 of positioning and locking screw 3, complete the installation of line pipe fitting 2 in ultrasonic calorimeter 1.

Finally, it should be noted that above what enumerate is only specific embodiment of the utility model.Obviously, the utility model is not limited to above embodiment, can also have a lot of distortion.All distortion that those of ordinary skill in the art can directly derive or associate from the disclosed content of the utility model, all should think protection domain of the present utility model.

Claims

1. a ultrasonic calorimeter line pipe fitting, for being arranged in the pipeline of ultrasonic calorimeter, it is characterized in that, described line pipe fitting is columniform pipeline, by positioning and locking screw, be fixed on the axis in ultrasonic calorimeter pipeline, the caliber of line pipe fitting is less than the caliber of ultrasonic calorimeter.

2. line pipe fitting according to claim 1, is characterized in that, the inner-walls of duct surface roughness Ra of described line pipe fitting is less than 1.6 μ m, and profile arithmetic average error is less than 1.6 μ m.

3. line pipe fitting according to claim 1, is characterized in that, is fixed with two and is the catoptron of 45° angle with inner-walls of duct, the relative and non-parallel setting of the minute surface of two catoptrons in the pipeline of described line pipe fitting.