CN102121854B - V-shaped flow tube for ultrasonic heat meter - Google Patents

Abstract

A V-shaped flow tube for an ultrasonic heat meter, which includes a tube body with inlet and outlet ports and matching temperature sensor installation holes, and is characterized in that a V-shaped tube is provided on the tube body between the inlet and outlet ports. , the two upper ports of the V-shaped tube are the installation holes Ⅰ and Ⅱ of the ultrasonic transducer respectively, and the bottom port of the V-shaped tube is sealed and connected with the ultrasonic reflection plug; reflective surface. It solves the problem that the measurement accuracy of the existing heat meter can only be guaranteed through the complex variable diameter structure. Because the structure that reduces the number of ultrasonic reflections is adopted, the influence of the attenuation of repeated refraction of the ultrasonic wave on the measurement accuracy is reduced, and the measurement accuracy is high and the pressure loss is small; It can conveniently clean the reflective surface and the inner wall of the pipe on-line without dismantling the heat meter or returning it to the factory for repair, which improves the service life of the heat meter and reduces the operation and maintenance cost of the heat meter. It is especially suitable for poor water quality. Use in environments prone to fouling.

Description

V-shaped flow tube for ultrasonic heat meter

technical field

The invention relates to the technical field of flow measurement devices, and relates to a V-shaped flow tube for an ultrasonic heat meter. Background technique

At present, ultrasonic flow measurement technology has been used in heat meters very mature, especially the reflection type application is more common, generally consists of flow tube, reflector (including the use of flow tube itself for reflection), ultrasonic emission device and metering device, Among them, there are mainly two reflection methods, one is to install a reflector in the flow tube, and use the reflector to reflect ultrasonic waves; the other is to use the inner wall of the flow tube to reflect, and there is no additional reflector installed in the flow tube. No matter which method is used, due to the limitation of the length of the meter body itself, in order to ensure the measurement accuracy, it is basically solved by the necking of the measurement section; There will be fouling on the surface, and the longer the running time, the thicker the fouling, which will eventually lead to inaccurate or impossible measurement; although there are now detachable reflectors, the reflectors can be removed for cleaning when necessary, but the disassembly of reflectors Complicated, on-site installation and operation are difficult, and on-site disassembly and assembly of reflectors will also affect the measurement accuracy of the product, and the product needs to be re-tested. Contents of the invention

The object of the present invention is to address the deficiencies of the prior art, to provide a V-shaped flow tube for ultrasonic heat meters with reasonable structure, less ultrasonic reflection times, high measurement accuracy, small pressure loss, online cleaning of the flow tube, and convenient cleaning. .

The technical scheme adopted to realize the above-mentioned purpose is:

A V-shaped flow tube for an ultrasonic heat meter, which includes a tube body, on which an inlet, an outlet, and a paired temperature sensor installation hole are arranged, and is characterized in that: the tube body located between the inlet and the outlet is provided with There is a V-shaped tube, the two upper ports of the V-shaped tube are ultrasonic transducer installation hole I and ultrasonic transducer installation hole II, and the bottom port of the V-shaped tube is sealed and connected with the ultrasonic reflection plug.

The intersection of the two centerlines of the V-shaped tube is on the reflection surface of the ultrasonic reflection plug.

In the V-shaped flow tube for ultrasonic heat meter of the present invention, since a V-shaped tube is arranged on the tube body between the water inlet and the water outlet, the two upper ports of the V-shaped tube are respectively ultrasonic transducer installation holes I and II, the bottom port of the V-shaped tube is sealed and connected with the ultrasonic reflection wire plug, which solves the problem that the existing ultrasonic heat meter can only ensure the measurement accuracy through a complicated variable diameter structure. The structure of the number of ultrasonic reflections reduces the influence of the attenuation of repeated ultrasonic refraction on the measurement accuracy. It has high measurement accuracy and small pressure loss; it is also convenient to remove the ultrasonic reflection plug for online cleaning of the reflection surface and the inner wall of the pipe body without dismantling There is no need to return the heat meter to the factory for repair, which improves the service life of the heat meter and reduces the operation and maintenance cost of the heat meter. It is especially suitable for the environment with poor hot water quality and easy scaling. Description of drawings

Figure 1 is a schematic diagram of the structure of a V-shaped flow tube for an ultrasonic heat meter;

Fig. 2 is a schematic cross-sectional view of a V-shaped flow tube structure for an ultrasonic heat meter.

In the figure: 1 water inlet, 2 ultrasonic transducer installation hole Ⅰ, 3 V-shaped tube, 4 ultrasonic transducer installation hole Ⅱ, 5 water outlet, 6 sealing gasket, 7 ultrasonic reflection plug, 8 paired temperature sensor installation hole, 9 tube body. Detailed ways

The present invention will be further described below using the drawings and specific embodiments.

The V-shaped flow tube for ultrasonic heat meter of the present invention includes a tube body 9, on which inlet and outlet ports 1 and 5 and matching temperature sensor mounting holes 8 are arranged, and between the inlet and outlet ports 1 and 5 The tube body 9 is provided with a V-shaped tube 3, and the two upper ports of the V-shaped tube 3 are respectively an ultrasonic transducer installation hole I2 and an ultrasonic transducer installation hole II4, and the bottom port of the V-shaped tube 3 passes through The sealing gasket 6 is sealed and connected with the ultrasonic reflection plug 7 .

The intersection of the two centerlines of the V-shaped tube 3 is on the reflection surface of the ultrasonic reflection plug 7 .

The V-shaped pipe 3 selects a suitable aperture and included angle according to the specifications of the product.

The pipe body 9 is formed by forging and pressing of copper alloy, and may also be formed by precision casting of stainless steel.

The ultrasonic reflective plug 7 is made of stainless steel, and the reflective surface is polished.

The ultrasonic heat meter with the V-shaped flow tube of the present invention does not need to be disassembled during production, testing, installation and use. After the heat meter is installed and used for a certain period of time, the reflection surface of the ultrasonic reflection plug 7 and the inner wall of the pipe body 9 need to be When cleaning, close the valve on the heating pipeline, remove the ultrasonic reflection wire plug 7 online and use a special cleaning tool to clean the reflection surface of the ultrasonic reflection wire plug 7 and the inner wall of the pipe body 9, and remove the ultrasonic reflection wire plug after cleaning. 7 and the sealing gasket 6 are sealed and connected with the bottom port of the V-shaped tube 3, and the ultrasonic heat meter can resume normal operation.

Claims (2)

1. A V-shaped flow tube for an ultrasonic heat meter, which comprises a tube body, is provided with inlet and outlet ports and matching temperature sensor mounting holes on the tube body, and is characterized in that: the tube body between the inlet and outlet There is a V-shaped tube on the top, the two upper ports of the V-shaped tube are the ultrasonic transducer installation hole I and the ultrasonic transducer installation hole II, and the bottom port of the V-shaped tube is sealed and connected with the ultrasonic reflection plug . 2. The V-shaped flow tube for ultrasonic heat meters according to claim 1, characterized in that: the intersection point of the two centerlines of the V-shaped tube is on the reflective surface of the ultrasonic reflective wire plug.

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