Mounting base structure of gas ultrasonic flow sensor

Abstract

The utility model relates to a mounting base structure of a gas ultrasonic flow sensor, and belongs to the technical field of gas flow sensor mounting. According to the technical scheme, a through hole is formed by a bottom cylindrical through hole (6) and an upper cylindrical through hole (11), the front portion of the gas ultrasonic flow sensor (3) penetrates out of the through hole, and the axis of the through hole is the axis (13) of the gas ultrasonic flow sensor; a bottom cylinder axis (14) of the bottom cylinder is perpendicular to a field pipeline, an included angle theta is formed between the bottom cylinder axis (14) and the axis of the gas ultrasonic flow sensor, and the included angle theta is the mounting angle of the gas ultrasonic flow sensor; and the bottom cylindrical through hole is obliquely arranged in the bottom cylinder (4), and the inclination angle is theta. The gas ultrasonic flow sensor base has the advantages that on the premise that the installation angle of a gas ultrasonic flow sensor is guaranteed, the base is integrally and vertically welded to the outer wall of a field pipeline, the center of the base can be well aligned with a drawn center point, and the welding position of the base is more accurate.

Description

Technical Field

[0001] The utility model relates to an installation base structure of a gas ultrasonic flow sensor, belonging to the technical field of gas flow sensor installation. Background Art

[0002] At present, gas ultrasonic flow sensors are mainly installed in an insertion manner, such as the Chinese patent CN201420150741.3 named "An Insertion Sensor of an Ultrasonic Flowmeter", etc. After the installation of the gas ultrasonic flow sensor is completed, it is required that there is a certain inclination angle θ between the axis of the gas ultrasonic flow sensor and the axis of the on-site pipeline, that is, the installation angle of the gas ultrasonic flow sensor. When installing, it is necessary to first weld a base on the on-site pipeline, and then complete the installation and ensure the seal through a ball valve, a sealing short section and a locking nut. The upper part of the base in the existing technology is a regular circular ring body, and the bottom end face is an inclined plane with a radian, and the radian of this inclined plane matches the outer diameter of the on-site pipeline. The whole base is welded and installed on the on-site pipeline in an inclined manner. When installing, it is necessary to pre-draw the installation position of the base on the on-site pipeline, and generally use the intersection point of the drawn cross to be the installation position of the base; however, when welding the base after drawing the installation position of the base on the site, since the base needs to be welded on the on-site pipeline as a whole in an inclined manner, it is not easy to align the center of the whole inclined base with the drawn intersection point of the cross. Coupled with the deformation during welding, it is very difficult to ensure the accurate installation angle of the gas ultrasonic flow sensor after the base is welded, and it is easy to cause the non-coaxial center lines of two paired and matched gas ultrasonic flow sensors, resulting in poor signal quality and low signal intensity of the gas ultrasonic flow sensor. Especially when installing a multi-channel ultrasonic flow sensor on the on-site pipeline, the problem will be more prominent. Content of the Utility Model

[0003] The purpose of the utility model is to provide an installation base structure of a gas ultrasonic flow sensor. On the premise of ensuring the installation angle of the gas ultrasonic flow sensor, the whole base is vertically welded on the outer wall of the on-site pipeline. The center of the base can be better aligned with the drawn center point. The deformation control during vertical welding is also easier than that during inclined welding. The welding position of the base is more accurate, which can ensure the coaxial center lines of two paired and matched gas ultrasonic flow sensors, improve the measurement accuracy of the instrument, and solve the above technical problems existing in the existing technology.

[0004] The technical solution of the utility model is as follows:

[0005] An installation base structure of a gas ultrasonic flow sensor, comprising an integrally structured bottom cylinder and an upper cylinder. A bottom cylindrical through-hole is provided in the bottom cylinder, and an upper cylindrical through-hole is provided in the upper cylinder; the bottom cylindrical through-hole and the upper cylindrical through-hole form a through-through hole, and the front part of the gas ultrasonic flow sensor passes through this through-hole, and the axis of this through-hole is the axis of the gas ultrasonic flow sensor; the axis of the bottom cylinder of the bottom cylinder is perpendicular to the on-site pipeline and forms an angle θ with the axis of the gas ultrasonic flow sensor, and the angle of this angle θ is the installation angle of the gas ultrasonic flow sensor; the bottom cylindrical through-hole is arranged obliquely inside the bottom cylinder, and the inclination angle is θ.

[0006] The bottom of the bottom cylinder is welded to the on-site pipeline. A middle inverted frustum is provided between the bottom cylinder and the upper cylinder. An inverted frustum-shaped through-hole is provided in the middle inverted frustum. The bottom cylindrical through-hole, the inverted frustum-shaped through-hole and the upper cylindrical through-hole form a through-through hole, and the front part of the gas ultrasonic flow sensor passes through this through-hole.

[0007] The upper end surface of the bottom cylinder is an inclined surface, and the inclination angle of this inclined surface is the same as the angle θ. The lower part of the middle inverted frustum is integrated with this inclined surface, and the upper part of the middle inverted frustum is integrated with the lower part of the upper cylinder. The central axis of the middle inverted frustum and the upper cylinder is the axis of the gas ultrasonic flow sensor, and the angle with the axis of the bottom cylinder is θ.

[0008] The inner diameter of the bottom cylindrical through-hole is equal to the bottom inner diameter of the inverted frustum-shaped through-hole, and the top inner diameter of the inverted frustum-shaped through-hole is equal to the inner diameter of the upper cylindrical through-hole.

[0009] The bottom surface of the bottom cylinder is an inclined surface with a radian, and the radian of this inclined surface matches the outer diameter of the on-site pipeline.

[0010] The outer diameter of the top of the middle inverted frustum is larger than the outer diameter of the upper cylinder, forming a step. A ring-shaped groove is provided on the step. A thread is provided on the outer wall of the upper cylinder. The upper cylinder is connected to the ball valve through the thread. The ring-shaped groove is used to install a sealing gasket to facilitate the sealing of the connection.

[0011] A support ring is provided in the inverted frustum-shaped through-hole, and the front part of the gas ultrasonic flow sensor passes through the support ring. The support ring fills the space between the gas ultrasonic flow sensor and the inner wall of the inverted frustum-shaped through-hole to support the gas ultrasonic flow sensor and prevent the gas ultrasonic flow sensor from shaking.

[0012] Advantages of the present utility model: When welding the base, on the premise of ensuring the installation angle of the gas ultrasonic flow sensor, the overall base is vertically welded on the outer wall of the on-site pipeline. The center of the base can be better aligned with the drawn center point. Deformation control during vertical welding is also easier than during inclined welding, and the welding position of the base is more accurate, which can ensure the coaxiality of the center lines of two paired and matched gas ultrasonic flow sensors, improving the measurement accuracy of the instrument. Brief Description of the Drawings

[0013] Figure 1 It is a schematic structural diagram of an embodiment of the present utility model;

[0014] Figure 2 It is a schematic structural diagram of the base of an embodiment of the present utility model;

[0015] Figure 3 It is a schematic cross-sectional view of the base structure of an embodiment of the present utility model;

[0016] In the figure: base 1, sealing gasket 2, gas ultrasonic flow sensor 3, bottom cylinder 4, bottom surface 5, bottom cylindrical through hole 6, upper end surface 7, middle inverted frustum 8, annular groove 9, thread 10, upper cylindrical through hole 11, inverted frustum-shaped through hole 12, axis of gas ultrasonic flow sensor 13, axis of bottom cylinder 14, upper cylinder 15, support ring 16. Detailed Embodiment

[0017] The present utility model will be further elaborated in detail through the following embodiments.

[0018] An installation base structure for a gas ultrasonic flow sensor includes an integrally structured bottom cylinder 4 and upper cylinder 15. A bottom cylindrical through hole 6 is provided inside the bottom cylinder 4, and an upper cylindrical through hole 11 is provided inside the upper cylinder 15; the bottom cylindrical through hole 6 and the upper cylindrical through hole 11 form a through hole, and the front part of the gas ultrasonic flow sensor 3 passes through this through hole, and the axis of this through hole is the axis 13 of the gas ultrasonic flow sensor; the axis 14 of the bottom cylinder of the bottom cylinder is perpendicular to the on-site pipeline and forms an angle θ with the axis 13 of the gas ultrasonic flow sensor, and the angle of this angle θ is the installation angle of the gas ultrasonic flow sensor; the bottom cylindrical through hole 6 is inclinedly arranged inside the bottom cylinder 4, and the inclined angle is θ.

[0019] The bottom of the bottom cylinder 4 is welded to the on-site pipeline. A middle inverted frustum 8 is provided between the bottom cylinder 4 and the upper cylinder 15. An inverted frustum-shaped through hole 12 is provided inside the middle inverted frustum 8. The bottom cylindrical through hole 6, the inverted frustum-shaped through hole 12 and the upper cylindrical through hole 11 form a through hole, and the front part of the gas ultrasonic flow sensor 3 passes through this through hole.

[0020] The upper end face 7 of the bottom cylinder 4 is an inclined plane, and the inclination angle of this inclined plane is the same as the included angle θ. The lower part of the middle inverted frustum 8 is integrally connected with this inclined plane, and the upper part of the middle inverted frustum 8 is integrally connected with the lower part of the upper cylinder 15. The central axis of the middle inverted frustum 8 and the upper cylinder 15 is the axis 13 of the gas ultrasonic flow sensor, and the included angle with the axis 14 of the bottom cylinder is θ.

[0021] The inner diameter of the bottom cylindrical through hole 6 is equal to the bottom inner diameter of the frustum-shaped through hole 12, and the top inner diameter of the frustum-shaped through hole 12 is equal to the inner diameter of the upper cylindrical through hole 11.

[0022] The bottom surface 5 of the bottom cylinder 4 is an inclined plane with a radian, and the radian of this inclined plane matches the outer diameter of the on-site pipeline.

[0023] The outer diameter of the top of the middle inverted frustum 8 is larger than the outer diameter of the upper cylinder 15, forming a step. There is an annular groove 9 on the step. There is a thread 10 on the outer wall of the upper cylinder 15. The upper cylinder 15 is connected to the ball valve through the thread 10. The annular groove 9 is used to install the sealing washer 2 to facilitate the sealing at the connection.

[0024] A support ring 16 is provided in the frustum-shaped through hole 12. The front part of the gas ultrasonic flow sensor 3 passes through the support ring 16. The support ring 16 fills the space between the gas ultrasonic flow sensor 3 and the inner wall of the frustum-shaped through hole 12 to support the gas ultrasonic flow sensor 3 and prevent the gas ultrasonic flow sensor 3 from shaking.

[0025] In the embodiment, the installation base structure of a gas ultrasonic flow sensor is divided into upper and lower parts. The lower part is the bottom cylinder 4. There is a bottom cylindrical through hole 6 with an included angle θ with the axis 14 of the bottom cylinder inside the bottom cylinder 4. The bottom cylindrical through hole 6 is an inclined hole; the bottom end face of the bottom cylinder 4 is an arc surface, and the radius of curvature of the arc surface is the same as the outer diameter (radius) of the on-site pipeline. The bottom of the bottom cylinder 4 is vertically welded to the on-site pipeline; the upper end face of the bottom cylinder is an inclined plane. The upper part is a combined body of the middle inverted frustum 8 and the upper cylinder 15. The inside of the combined body is a through hole, and the center line of the through hole is consistent with the axis of the bottom cylindrical through hole 6. The lower surface of the middle inverted frustum 8 is connected to the upper end face of the bottom cylinder 4 (processed after welding). There is an annular groove on the upper surface of the middle inverted frustum 8 for installing the sealing washer; the outer wall of the upper cylinder 15 is processed with threads for connecting the valve. The aperture of the bottom cylindrical through hole 6 is Φ34mm; the aperture of the upper cylindrical through hole 11 is Φ40mm.

[0026] When installing the gas ultrasonic flow sensor, connect the special hole-opening tool (prior art) to the ball valve, and then the hole can be opened on the on-site pipeline. When installing the gas ultrasonic flow sensor, the bottom cylinder 4 is vertically welded to the outer wall of the on-site pipeline. The radius of curvature of the bottom surface 5 of the bottom cylinder is the same as the radius of the on-site pipeline, and it is closely attached to the outer wall of the on-site pipeline during welding. The included angle between the axis of the bottom cylindrical through hole 6 and the axis of the bottom cylinder is θ. The upper part of the base is arranged obliquely. The hole opening on the outer wall of the on-site pipeline and the installation of the gas ultrasonic flow sensor 3 are exactly the same as those in the traditional base hole opening and installation. The bottom cylinder 4 is vertically welded to the outer wall of the on-site pipeline. Compared with the traditional base which is obliquely welded to the outer wall of the on-site pipeline, the center of the base is easier to align and the welding deformation is easier to control, making the welding position of the base more accurate.

Claims

1. The installation base structure of a gas ultrasonic flow sensor, characterized in that: It includes a bottom cylinder (4) and an upper cylinder (15) of an integral structure. A bottom cylindrical through-hole (6) is provided inside the bottom cylinder (4), and an upper cylindrical through-hole (11) is provided inside the upper cylinder (15); the bottom cylindrical through-hole (6) and the upper cylindrical through-hole (11) form a through through-hole, and the front part of the gas ultrasonic flow sensor (3) passes through this through-hole, and the axis of this through-hole is the axis (13) of the gas ultrasonic flow sensor; the axis (14) of the bottom cylinder of the bottom cylinder is perpendicular to the on-site pipeline and forms an angle θ with the axis (13) of the gas ultrasonic flow sensor, and the angle of this angle θ is the installation angle of the gas ultrasonic flow sensor; the bottom cylindrical through-hole (6) is arranged obliquely inside the bottom cylinder (4), and the inclination angle is θ.

2. The mounting base structure of a gas ultrasonic flow sensor according to claim 1, characterized in that: The bottom of the bottom cylinder (4) is welded to the on-site pipeline. A middle inverted frustum (8) is provided between the bottom cylinder (4) and the upper cylinder (15). An inverted frustum-shaped through-hole (12) is provided inside the middle inverted frustum (8). The bottom cylindrical through-hole (6), the inverted frustum-shaped through-hole (12) and the upper cylindrical through-hole (11) form a through through-hole, and the front part of the gas ultrasonic flow sensor (3) passes through this through-hole.

3. The mounting base structure of a gas ultrasonic flow sensor according to claim 2, characterized in that: The upper end face (7) of the bottom cylinder (4) is an inclined plane, and the inclination angle of this inclined plane is the same as the angle θ. The lower part of the middle inverted frustum (8) is integrated with this inclined plane, and the upper part of the middle inverted frustum (8) is integrated with the lower part of the upper cylinder (15). The central axis of the middle inverted frustum (8) and the upper cylinder (15) is the axis (13) of the gas ultrasonic flow sensor, and the angle with the axis (14) of the bottom cylinder is θ.

4. The mounting base structure of a gas ultrasonic flow sensor according to claim 3, characterized in that: The inner diameter of the bottom cylindrical through-hole (6) is equal to the bottom inner diameter of the inverted frustum-shaped through-hole (12), and the top inner diameter of the inverted frustum-shaped through-hole (12) is equal to the inner diameter of the upper cylindrical through-hole (11).

5. The mounting base structure of a gas ultrasonic flow sensor according to claim 1 or 2, characterized in that: The bottom surface (5) of the bottom cylinder (4) is an inclined plane with a radian, and the radian of this inclined plane matches the outer diameter of the on-site pipeline.

6. The mounting base structure of a gas ultrasonic flow sensor according to claim 3, characterized in that: The outer diameter of the top of the middle inverted frustum (8) is larger than the outer diameter of the upper cylinder (15), forming a step. A ring groove (9) is provided on the step, and a thread (10) is provided on the outer wall of the upper cylinder (15).

7. The mounting base structure of a gas ultrasonic flow sensor according to claim 2, characterized in that: A support ring (16) is provided inside the inverted frustum-shaped through-hole (12). The front part of the gas ultrasonic flow sensor (3) passes through the support ring (16). The support ring (16) fills the space between the gas ultrasonic flow sensor (3) and the inner wall of the inverted frustum-shaped through-hole (12) to support the gas ultrasonic flow sensor (3).

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