CN203605982U

CN203605982U - ASME large-diameter nozzle device

Info

Publication number: CN203605982U
Application number: CN201320752513.9U
Authority: CN
Inventors: 汤娟; 朱惠娟; 徐凤琴; 华正伟; 包坚伟; 谈杰
Original assignee: JIANGYIN HONGDA METER Co Ltd
Current assignee: JIANGYIN HONGDA METER Co Ltd
Priority date: 2013-11-26
Filing date: 2013-11-26
Publication date: 2014-05-21
Anticipated expiration: 2023-11-26

Abstract

The utility model relates to an ASME large-diameter nozzle device. The ASME large-diameter nozzle device comprises a first measurement pipe (1) and a second measurement pipe (2), wherein the first measurement pipe (1) and the second measurement pipe (2) are connected through a flange, a nozzle (3) is arranged between the first measurement pipe (1) and the second measurement pipe (2) in a clamped mode, a connecting section (3.1) of the nozzle (3) is of an annular structure which is arranged between the first measurement pipe (1) and the second measurement pipe (2) in a clamped mode, an extension section (3.2) is of a cylindrical structure which is connected to the connecting section (3.1), a first pressure measuring pipe (4) is connected to the first measurement pipe (1) in a penetrating mode, a second pressure measuring pipe (5) is arranged between the first measurement pipe (1) and the second measurement pipe (2) in a clamped mode, a connecting curved hole (3.3) is formed in the pipe walls of the connecting section (3.1) and the extension section (3.2) which constitute the nozzle (3), one end of the connecting curved hole (3.3) is communicated with the second pressure measuring pipe (5), and the other end of the connecting curved hole (3.3) is communicated with the extension section (3.2) through a punched hole (3.4) in the inner pipe wall of the extension section (3.2). The ASME large-diameter nozzle device is high in measurement accuracy.

Description

Throat's pressure long-radius nozzle device

Technical field

The utility model relates to a kind of throat pressure long-radius nozzle device.

Background technology

Nozzle throttle device (or claiming restriction flowmeter) is a kind of restriction device of flowing through in pipeline at the fluid that is full of pipeline, a fluid stream will form local contraction in throttling place, thereby flow velocity is increased, static pressure reduces, so it is poor to have produced static pressure before and after throttling element, process control and measurement that it is widely used in the fields such as oil, chemical industry, metallurgy, electric power, heat supply, water supply, be applied to Turbine Performance Test especially; Conventional nozzle throttle device is that nozzle is installed in straight-run of pipe section, conventionally adopts the mode such as beat to be directly installed in pressure pipe, causes nozzle to be combined undertighten with straight length inwall, causes measurement accurate not; This structure upstream flow development length is minimum is 20 times of calibers, be included in the rectifier that install at caliber place, at least 16 times of throttling element upstreams, by U.S. ASMEPTC6.0 standard design, because the uncertainty of its efflux coefficient C is only+0.5%, it is 25% of general Long Nozzle, especially feed water and measure above for nuclear power station owner, need more high-precision nozzle throttle device.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned deficiency, and throat's pressure long-radius nozzle device that a kind of measuring accuracy is high is provided.

The purpose of this utility model is achieved in that a kind of throat pressure long-radius nozzle device, described device includes the measuring tube one connected by flange and measuring tube two, between described measuring tube one and measuring tube two, be gripped with nozzle, described nozzle includes connected linkage section and extension, described linkage section and extension are a monolithic construction, described linkage section is one to be placed in the ring texture between measuring tube one and measuring tube two, described extension is one to be connected in the tubular structure on linkage section, described extension is inserted in measuring tube two, on described measuring tube one, cross-under has pressure pipe one, there is pressure pipe two to be folded between measuring tube one and measuring tube two, and form on the linkage section of nozzle and the tube wall of extension and be provided with a connecting bending hole, this one end, connecting bending hole is connected with pressure pipe two, the perforation of the other end on the inner tubal wall of extension is communicated to extension.

The utility model throat pressure long-radius nozzle device, described measuring tube one is connected with pressure pipe two by flange away from one end of measuring tube two, and between measuring tube one and pressure pipe two, be gripped with rectifier, described rectifier is one to be provided with the circular slab of multiple through holes.

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

The utility model makes measuring accuracy more accurate by the mode of throat's pressure, and its setting by rectifier can further improve precision for requiring higher place; Thereby make it possible to be applicable to the measurement of nuclear power station owner feedwater flow.

Accompanying drawing explanation

Fig. 1 is the structural representation of the utility model throat pressure long-radius nozzle device.

Wherein:

Measuring tube 1, measuring tube 22, nozzle 3, pressure pipe 1, pressure pipe 25, measuring tube 36, rectifier 7;

Linkage section 3.1, extension 3.2, be communicated with curved hole 3.3, perforation 3.4.

Embodiment

Referring to Fig. 1, a kind of throat pressure long-radius nozzle device that the utility model relates to, described device includes the measuring tube one 1 connected by flange and measuring tube 22, between described measuring tube 1 and measuring tube 22, be gripped with nozzle 3, described nozzle 3 includes connected linkage section 3.1 and extension 3.2, described linkage section 3.1 and extension 3.2 are a monolithic construction, described linkage section 3.1 is one to be placed in the ring texture between measuring tube 1 and measuring tube 22, described extension 3.2 is one to be connected in the tubular structure on linkage section 3.1, described extension 3.2 is inserted in measuring tube 22, on described measuring tube 1, cross-under has pressure pipe 1, there is pressure pipe 25 to be folded between measuring tube 1 and measuring tube 22, and form on the linkage section 3.1 of nozzle 3 and the tube wall of extension 3.2 and be provided with a connecting bending hole 3.3, these 3.3 one end, connecting bending hole are connected with pressure pipe 25, the many cylindrical void line segment of the perforation 3.4 of the other end on 3.2 inner tubal walls of extension shown in being communicated on the 3.2(figure of extension stays for ease of processing, its essence is to be communicated with curved hole pressure pipe 25 is connected with the inwall of the extension 3.2 of nozzle 3, thereby the liquid liquid to this end of flowing through is easily sampled smoothly),

Because the curved hole 3.3 of the connection by nozzle 2 samples (being also equivalent to sample from the throat of nozzle), therefore avoided the interference (as flow impact, liquid temperature etc.) of other factors, therefore its precision is higher, experiment at present records its measuring accuracy and can, up to 0.3 grade, can be applicable to the measurement of nuclear power station owner feedwater flow;

Simultaneously, for further increasing precision, described measuring tube 1 is connected with pressure pipe 25 by flange away from one end of measuring tube 22, and be gripped with rectifier 7 between measuring tube 1 and pressure pipe 25, described rectifier 7 is one to be provided with the circular slab of multiple through holes, its role is to make the liquid flow velocity of flowing through more uniform and stable, further improve the precision of measuring.

Claims

1. throat's pressure long-radius nozzle device, described device includes the measuring tube one (1) connected by flange and measuring tube two (2), between described measuring tube one (1) and measuring tube two (2), is gripped with nozzle (3), it is characterized in that:

Described nozzle (3) includes connected linkage section (3.1) and extension (3.2), described linkage section (3.1) and extension (3.2) are a monolithic construction, described linkage section (3.1) is one to be placed in the ring texture between measuring tube one (1) and measuring tube two (2), described extension (3.2) is one to be connected in the tubular structure on linkage section (3.1), described extension (3.2) is inserted in measuring tube two (2), the upper cross-under of described measuring tube one (1) has pressure pipe one (4), there is pressure pipe two (5) to be folded between measuring tube one (1) and measuring tube two (2), and form on the linkage section (3.1) of nozzle (3) and the tube wall of extension (3.2) and be provided with a connecting bending hole (3.3), this one end, connecting bending hole (3.3) is connected with pressure pipe two (5), the perforation (3.4) of the other end on the inner tubal wall of extension (3.2) is communicated to extension (3.2).

2. a kind of throat pressure long-radius nozzle device as claimed in claim 1, it is characterized in that: described measuring tube one (1) is connected with pressure pipe two (5) by flange away from one end of measuring tube two (2), and between measuring tube one (1) and pressure pipe two (5), be gripped with rectifier (7), described rectifier (7) is one to be provided with the circular slab of multiple through holes.