Fluid rectifier applied to ultrasonic water meter

Abstract

The utility model relates to a water meter, and aims to provide a fluid rectifier applied to an ultrasonic water meter, which has a better rectification effect. According to the technical scheme, the fluid rectifier applied to the ultrasonic water meter is characterized in that the rectifier is in a funnel shape and comprises a supporting ring arranged on the front portion and fixed to the inner wall of a water pipe and a plurality of rectifying plates arranged on the rear portion and fixed to the supporting ring; the rectifying plates are arranged in the bus direction of the rectifier, and the distance between the rectifying plates is gradually reduced from front to back.

Description

Technical Field

[0001] The utility model relates to a water meter, in particular to a fluid rectifier applied to an ultrasonic water meter. Background Art

[0002] In the measurement and inspection of flow meters, the fluid velocity distribution plays a vital role in the accuracy and measurement reliability of velocity flow meters. Therefore, in practical applications, there are generally certain requirements for the installation conditions of flow meters.

[0003] The national verification regulations JJG162-2019 recommend that water meters should have a straight pipe section length of no less than 10DN upstream and no less than 5DN downstream (DN is the inner diameter of the pipe section). However, in actual applications, it is sometimes difficult to meet the requirements due to constraints such as site conditions. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the above-mentioned background technology and to provide a fluid rectifier applied to an ultrasonic water meter, wherein the rectifier should have a good rectifying effect.

[0005] The technical solution of the utility model is:

[0006] A fluid rectifier used in an ultrasonic water meter, characterized in that: the rectifier is funnel-shaped, including a support ring arranged at the front and fixed to the inner wall of a water pipe, and a plurality of rectifier plates arranged at the rear and fixed to the support ring; the rectifier plates are arranged in the busbar direction of the rectifier, and the spacing between the rectifier plates gradually decreases from front to back.

[0007] The rectifying plate is rotationally symmetrical about the central axis; the rectifying plate maintains a certain angle with the central axis.

[0008] The rectifier plate includes a first rectifier plate as a first rectifier part and a second rectifier plate as a second rectifier part; a reinforcement ring is provided between the first rectifier plate and the second rectifier plate; the axial length of the first rectifier part is greater than the axial length of the second rectifier part; the outer diameter of the reinforcement ring is smaller than the outer diameter of the support ring.

[0009] The first rectifier plate is arranged in the busbar direction of the first rectifier part; the first rectifier plate is rotationally symmetrical about the central axis; the second rectifier plate is arranged in the busbar direction of the second rectifier part; the second rectifier plate is rotationally symmetrical about the central axis.

[0010] The front end of the first rectifier plate is fixed to the support ring and the rear end is fixed to the reinforcement ring; the front end of the second rectifier plate is fixed to the reinforcement ring and the rear end is fixed to the end plate.

[0011] The included angle between the first rectifier plate and the central axis is 10-20 degrees; the included angle between the second rectifier plate and the central axis is 30-50 degrees.

[0012] The included angle between the first rectifier plate and the central axis is 15 degrees; the included angle between the second rectifier plate and the central axis is 40 degrees.

[0013] The number of the first rectifier plates is 10; the number of the second rectifier plates is 5.

[0014] The support ring is provided with positioning grooves and convex points.

[0015] The beneficial effects of the utility model are:

[0016] The utility model is installed at the inlet end of the water meter, and the fluid is rectified after passing through the rectifier, so that it enters the water meter in a stable state, effectively eliminating the unstable state of the upstream fluid, shortening the necessary straight pipe section length upstream of the water meter, solving the defects caused by site conditions, and ensuring the accuracy and reliability of water meter measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 2 It is a main structural schematic diagram of the utility model.

[0019] Figure 3 It is a right-side structural schematic diagram of the utility model.

[0020] Figure 4 It is a schematic diagram of an embodiment of the utility model.

[0021] Figure 5 It is a schematic diagram of the water meter inlet end.

[0022] Reference numerals: support ring 1, positioning groove 1.1, protrusion 1.2, first rectifier plate 2.1, second rectifier plate 2.2, reinforcement ring 3, end plate 4, step surface 5.1, notch 5.2, center axis A. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0024] like Figure 1 As shown, a fluid rectifier applied to an ultrasonic water meter comprises a support ring 1, a first rectifier plate 2.1, a second rectifier plate 2.2, a reinforcement ring 3, and an end plate 4.

[0025] The rectifier is a funnel-shaped rectifier with a large front and a small back. Figure 2 The right side is the front end and the left side is the rear end), and it is installed at the inlet end of the water meter. The front end of the rectifier is fixed to the inlet end, and the rear end extends into the inlet.

[0026] like Figure 2 As shown, the support ring, reinforcement ring and end plate are arranged from right to left in sequence. The front end of the first rectifier is fixed to the support ring and the rear end is fixed to the reinforcement ring. The front end of the second rectifier is fixed to the reinforcement ring and the rear end is fixed to the end plate. The outer diameter of the reinforcement ring is smaller than the outer diameter of the support ring. The outer diameter of the end plate is smaller than the outer diameter of the reinforcement ring. The reinforcement ring can enhance the structural strength of the rectifier. The end plate is a circular plate.

[0027] The first rectifying plate is the first rectifying part of the rectifier, and the second rectifying plate is the second rectifying part of the rectifier. The fluid passes through the first rectifying part and the second rectifying part in sequence to re-rectify the flow field.

[0028] The combination of the first rectifying plate, the support ring and the reinforcement ring is in the shape of a truncated cone (the first rectifying part is in the shape of a truncated cone), the support ring is the bottom surface of the truncated cone, the reinforcement ring is the top surface of the truncated cone, and the first rectifying plate is arranged in the busbar direction of the truncated cone (the first rectifying part).

[0029] The combination of the second rectifying plate, the reinforcement ring and the end plate is conical (the second rectifying part is conical), the reinforcement ring is the bottom surface of the cone, the end plate is the apex of the cone, and the second rectifying plate is arranged in the generatrix direction of the cone (the second rectifying part).

[0030] The first rectifier plate is rotationally symmetric about the central axis A. The second rectifier plate is rotationally symmetric about the central axis A. The central axis is the central axis of the rectifier, and is also the central axis of the frustum and the cone.

[0031] The axial length of the first rectifying part is greater than the axial length of the second rectifying part. The angle between the first rectifying plate and the central axis is 10-20 degrees. The angle between the second rectifying plate and the central axis is 30-50 degrees. The number of the first rectifying plates is 5-15. The number of the second rectifying plates is 3-8.

[0032] The length of the first rectifier plate is greater than that of the second rectifier plate. To ensure the strength of the first rectifier plate, the first rectifier plate may be bent in a certain arc shape.

[0033] The working principle of the utility model is: Figure 2 As shown, the first rectifier plate and the second rectifier plate are arranged front and back, as shown in FIG. Figure 3 As shown, the first rectifier plate and the second rectifier plate are arranged inside and outside. Therefore, when the disordered flow field passes through the rectifier, the first rectifier part first breaks up and disturbs the flow field, and the second rectifier part then re-rectifies the flow field, thereby obtaining a stable flow field that meets the water inlet requirements of the water meter.

[0034] Since the angle and density of the first rectifier plate and the second rectifier plate are closely related to the rectification effect, the larger the angle and the greater the density, the better the rectification effect, but the greater the pressure loss, so it needs to be determined according to the actual situation.

[0035] For a DN40 ultrasonic water meter with a nominal pipe diameter of 40 mm, the angle between the first rectifier plate and the central axis is preferably 15 degrees, the angle between the second rectifier plate and the central axis is preferably 40 degrees, the number of first rectifier plates is preferably 10, and the number of second rectifier plates is preferably 5. For other types of water meters, the angle and density need to be adjusted accordingly to ensure the rectification effect.

[0036] The support ring is provided with a positioning groove 1.1 and a convex point 1.2. Figure 5 As shown, a step surface 5.1 and a notch 5.2 are made at the inlet end of the water meter, and the support ring is fixed at the inlet end position by the cooperation of the positioning groove and the step surface to limit the axial movement of the rectifier. The protrusion and the notch serve as fool-proof structures, so that the rectifier can be installed at the inlet end at a suitable circumferential angle to ensure the rectification effect.

[0037] Preferably, the inner circumferential surface of the support ring is coplanar with the inner circumferential surface of the inlet end, and the notch is arranged at the top of the inlet end, and the convex point is located at the top of the support ring.

[0038] The preferred embodiments of the present invention are shown in the accompanying drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described in this specification. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

Claims

1. A fluid rectifier used in an ultrasonic water meter, characterized in that: The rectifier is funnel-shaped and comprises a support ring (1) arranged at the front and fixed to the inner wall of a water pipe, and a plurality of rectifier plates arranged at the rear and fixed to the support ring; the rectifier plates are arranged in the busbar direction of the rectifier, and the spacing between the rectifier plates gradually decreases from the front to the back.

2. The fluid rectifier used in an ultrasonic water meter according to claim 1, characterized in that: The rectifying plate is rotationally symmetrical about the central axis; the rectifying plate maintains a certain angle with the central axis.

3. The fluid rectifier used in an ultrasonic water meter according to claim 2, characterized in that: The rectifying plate comprises a first rectifying plate (2.1) as a first rectifying part and a second rectifying plate (2.2) as a second rectifying part; a reinforcement ring (3) is provided between the first rectifying plate and the second rectifying plate; the axial length of the first rectifying part is greater than the axial length of the second rectifying part; and the outer diameter of the reinforcement ring is smaller than the outer diameter of the support ring.

4. The fluid rectifier used in an ultrasonic water meter according to claim 3, characterized in that: The first rectifier plate is arranged in the busbar direction of the first rectifier part; the first rectifier plate is rotationally symmetrical about the central axis; the second rectifier plate is arranged in the busbar direction of the second rectifier part; the second rectifier plate is rotationally symmetrical about the central axis.

5. The fluid rectifier used in ultrasonic water meter according to claim 4, characterized in that: The front end of the first rectifying plate is fixed to the support ring and the rear end is fixed to the reinforcement ring; the front end of the second rectifying plate is fixed to the reinforcement ring and the rear end is fixed to the end plate (4).

6. A fluid rectifier for ultrasonic water meter according to claim 3 or 5, characterized in that: The included angle between the first rectifier plate and the central axis is 10-20 degrees; the included angle between the second rectifier plate and the central axis is 30-50 degrees.

7. The fluid rectifier used in ultrasonic water meter according to claim 6, characterized in that: The included angle between the first rectifier plate and the central axis is 15 degrees; the included angle between the second rectifier plate and the central axis is 40 degrees.

8. The fluid rectifier used in ultrasonic water meter according to claim 7, characterized in that: The number of the first rectifier plates is 10; the number of the second rectifier plates is 5.

9. A fluid rectifier for ultrasonic water meter according to claim 1 or 3 or 5 or 8, characterized in that: The support ring is provided with a positioning groove (1.1) and a convex point (1.2).

Images