A pre-rectification mechanism for ultrasonic gas meter

Abstract

The present invention discloses a pre-rectifying mechanism for an ultrasonic gas meter, which is characterized in that it comprises a fairing, a noise baffle and a plurality of rectifying plates arranged in an ultrasonic flow channel. The noise baffle is arranged on the fairing to form a semi-enclosed structure with the fairing. The fairing covers one end of the ultrasonic flow channel. A rectifying hole is arranged on the side of the fairing. A plurality of rectifying plates are arranged in the fairing along a direction perpendicular to the ultrasonic flow channel. The pre-rectifying mechanism for an ultrasonic gas meter of the present invention has a simple structure and is easy to manufacture. The gas is cut multiple times by combining the rectifying holes on the fairing and the rectifying plates inside, so that secondary rectification of the flow field can be achieved, which effectively avoids the influence of external flow field disturbance on ultrasonic measurement and solves the problem of uneven gas flow field in the ultrasonic flow channel of the existing ultrasonic gas meter.

Description

Technical Field

[0001] The invention relates to a pre-rectification mechanism of an ultrasonic gas meter. Background Art

[0002] Ultrasonic gas meters measure gas flow by detecting the gas flow rate in the ultrasonic detection channel, so whether the gas flow field in the channel is uniform has a great impact on the accuracy of ultrasonic measurement. Currently, the flow channels of ultrasonic gas meters on the market are all single rectifiers, which use rectifiers to rectify the gas flow field passing through the flow channel in an attempt to achieve a uniform flow field in the flow channel, but all under ideal conditions. However, when flow field disturbances occur at the front end of the flow channel, a single rectifier inside the flow channel cannot achieve a uniform flow field. Summary of the invention

[0003] The technical problem to be solved by the present invention is: the problem of uneven gas flow field in the ultrasonic flow channel of the existing ultrasonic gas meter.

[0004] In order to solve the above problems, the technical solution of the present invention is to provide a pre-rectification mechanism of an ultrasonic gas meter, which is characterized by: comprising a fairing, a noise baffle and a plurality of fairing plates arranged in the ultrasonic flow channel, the noise baffle is arranged on the fairing to form a semi-closed structure with the fairing, the fairing covers one end of the ultrasonic flow channel, the side of the fairing is provided with a fairing hole, and a plurality of fairing plates are arranged in the fairing along a direction perpendicular to the ultrasonic flow channel.

[0005] Preferably, the directions of the plurality of rectifying segments 1 and the plurality of rectifying segments 2 are perpendicular to each other, forming a cross grid structure.

[0006] Preferably, a plurality of the fairing holes are arranged along the side surface of the fairing.

[0007] Preferably, one end of the fairing is in a bell-mouth shape, and the other end is consistent in shape and size with the ultrasonic flow channel port. The bell-mouth end of the fairing is connected and fixed to the noise baffle, and the other end is connected and fixed to the ultrasonic flow channel.

[0008] Preferably, the hypotenuse of the bell mouth of the fairing is provided with an arc transition.

[0009] Preferably, the fairing hole is arranged at one end of the bell mouth of the fairing.

[0010] Preferably, a buckle hole is provided at one end of the fairing connected to the ultrasonic flow channel, and the buckle hole cooperates with a buckle protrusion provided on the side wall of the ultrasonic flow channel to fix the fairing on the ultrasonic flow channel.

[0011] Preferably, the noise baffle is provided with a plurality of buckles, and the buckles cooperate with the fairing holes on the fairing to connect and fix the noise baffle to the fairing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The ultrasonic gas meter pre-rectification mechanism of the present invention has a simple structure and is easy to manufacture. The gas is cut multiple times by combining the rectifying holes on the fairing and the rectifying sheets inside, so that secondary rectification of the flow field can be achieved, thereby effectively avoiding the influence of external flow field disturbance on ultrasonic measurement and solving the problem of uneven gas flow field in the ultrasonic flow channel of the existing ultrasonic gas meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an axonometric view of the ultrasonic flow channel with a rectifying mechanism;

[0015] Figure 2 It is a side view of the ultrasonic flow channel with a rectifying mechanism;

[0016] Figure 3 This is the three-view drawing of the fairing;

[0017] Figure 4 is a schematic diagram of the noise baffle structure;

[0018] Figure 5 This is the axonometric view of the ultrasonic flow channel. DETAILED DESCRIPTION

[0019] In order to make the present invention more clearly understood, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 As shown, a pre-rectification mechanism of an ultrasonic gas meter of the present invention comprises a fairing 1, a noise baffle 2, and a plurality of fairing pieces 3-2 installed in an ultrasonic flow channel 3. The noise baffle 2 is installed on the fairing 1 to form a semi-enclosed structure with the fairing 1. The fairing 1 covers one end of the ultrasonic flow channel 3. A plurality of fairing holes 1-2 are processed on the side of the fairing 1. A plurality of fairing pieces 1-1 are installed in the fairing 1 in a direction perpendicular to the ultrasonic flow channel 3.

[0021] like Figure 3 and Figure 5 As shown, one end of the fairing 1 is in the shape of a bell mouth, and the other end is consistent with the shape and size of the port of the ultrasonic flow channel 3 and is processed with two buckle protrusions 3-1 on both sides. The bell mouth is surrounded by evenly distributed flow holes 1-2, and the bell mouth is processed with arc transition 1-3. The fairing 1 is fixed on the ultrasonic flow channel 3 by matching the two buckle holes 1-4 with the two buckle protrusions 3-1 on the side wall of the ultrasonic flow channel 3.

[0022] like Figure 4As shown, four buckles 2-1 are processed on the inner side of the noise baffle 2, which are hooked on the fairing hole 1-2 on the fixed fairing 1 through the buckles 2-1 to fix the noise baffle 2 on the bell mouth end of the fairing 1. The noise baffle 2 can reduce the gas flow rate, allowing the gas to enter the ultrasonic flow channel 3 from the fairing hole 1-2 of the fairing 1, and at the same time can attenuate the interference of external noise on the ultrasonic wave, reducing the influence of external factors on ultrasonic measurement.

[0023] like Figure 2 As shown, when viewed from the side, the ultrasonic flow channel 3 equipped with the fairing 1 has the fairing pieces 1-1 inside the fairing 1 and the fairing pieces 3-2 inside the ultrasonic flow channel in a vertical direction, forming a cross grid structure, which effectively cuts and rectifies the gas passing through the flow channel multiple times, optimizes the flow field, and makes the internal flow field more uniform.

Claims

1. An ultrasonic gas meter pre-rectification mechanism, characterized in that: The invention comprises a fairing (1), a noise baffle (2) and a plurality of fairing blades (3-2) arranged in an ultrasonic flow channel (3); the noise baffle (2) is arranged on the fairing (1) and forms a semi-enclosed structure with the fairing (1); the fairing (1) covers one end of the ultrasonic flow channel (3); a fairing hole (1-2) is arranged on the side of the fairing (1); and a plurality of fairing blades (1-1) are arranged in the fairing (1) along a direction perpendicular to the ultrasonic flow channel (3); The directions of the plurality of rectifying segments 1 (1-1) and the plurality of rectifying segments 2 (3-2) are perpendicular to each other, forming a cross grid structure; A plurality of the fairing holes (1-2) are arranged along the side surface of the fairing (1); One end of the fairing (1) is in the shape of a bell mouth, and the other end is consistent in shape and size with the port of the ultrasonic flow channel (3); one end of the bell mouth of the fairing (1) is connected and fixed to the noise baffle (2), and the other end is connected and fixed to the ultrasonic flow channel (3); The noise baffle (2) is provided with a plurality of buckles, and the buckles cooperate with the fairing holes (1-2) on the fairing (1) to connect and fix the noise baffle (2) to the fairing (1); The hypotenuse of the bell mouth end of the fairing (1) is provided with an arc transition (1-3); The fairing hole (1-2) is arranged at one end of the bell mouth of the fairing (1).

2. The ultrasonic gas meter pre-rectifier mechanism according to claim 1, characterized in that: One end of the fairing (1) connected to the ultrasonic flow channel (3) is provided with a buckle hole, and the buckle hole cooperates with a buckle protrusion (3-1) provided on the side wall of the ultrasonic flow channel (3) to fix the fairing (1) on the ultrasonic flow channel (3).

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