Multi-channel ultrasonic flow meter

• US 10,557,733 B2
• Filed: 10/13/2017
• Issued: 02/11/2020
• Est. Priority Date: 01/23/2017
• Status: Active Grant

• Current Assignee: Qingdao Hiwits Meter Co., Ltd.
• Original Assignee: Qingdao Hiwits Meter Co., Ltd.
• Inventors: Fang, Xin, Li, Xinxing
• Primary Examiner(s): Kolb, Nathaniel J
• Application Number:
  US16/330,443
• Publication Number:
  US 20190346299A1
• Time in Patent Office: 851 Days
• CPC Class Codes: G01F 1/662 Constructional details
• CPC Class Codes: G01F 1/667 Arrangements of transducers for ultrasonic flowmeters; Circuits for operating ultrasonic flowmeters

Abstract

A multi-channel ultrasonic flowmeter includes transducer assemblies (21, 22,23, 24) and a pipe housing (10). Four transducer assembly installation holes (9) arranged at two ends of the pipe housing (10) close to flanges (4). The transducer assemblies (21, 22, 23, 24) are provided in the installation holes (9). The transducer assemblies (21, 22, 23, 24) includes transducers (7) and stationary posts (1). An upper portion of the stationary post (1) has a first cylindrical body (109). A lower portion of the stationary post (1) has a flat key-shaped protrusion (105) extending in an axial direction. The flat key-shaped position-limiting protrusion (105) limits rotation of the stationary post (1) around an axial thereof, and ensures accurate positioning of the axis of the stationary post (1). The transducer (7) and the stationary post (1) are respectively sealed to prevent leakage of a fluid. The multi-channel ultrasonic flow meter provides a thorough solution about fixed installation, positioning and sealing of the transducer (7), has a compact structure, can be installed conveniently, and has good sealing performance.

Claims

1. A multi-channel ultrasonic flowmeter, comprising transducer assemblies (21, 22, 23, 24) and a pipe housing (10), wherein flanges (4) are separately arranged at two ends of the pipe housing (10) and are provided with bolt holes (41), and four transducer assembly installation holes (9) are formed in the two ends of the pipe housing (10) close to the flanges (4);

each said transducer assembly comprises two transducers (7) and a stationary post (1), wherein two first installation holes (103) are formed in a middle of the stationary post (1), and the two transducers (7) are installed in the first installation holes (103);

each said transducer assembly further comprises a circular compression piece (6) and an elastic ring (601);

protrusions (61) extending outwards in a radial direction are symmetrically formed on two sides of each said circular compression piece (6), first installation faces (205) are formed in the first installation holes (103), bosses are arranged at transmitting ends of the transducers (7), other ends of the transducers (7) are attached to the first installation faces (205), the circular compression pieces (6) are installed in the first installation holes (103), and the protrusions (61) and the elastic rings (601) are installed in the first installation holes (103);

first sealing gaskets (8) are arranged between the first installation faces (205) and the transducers (7);

upper portions of the stationary posts (1) are provided with first cylindrical bodies (109), lower portions of the stationary posts (1) are provided with flat key-shaped protrusions (105) extending in an axial direction, first positioning step surfaces (106) are formed between the flat key-shaped protrusions (105) and the stationary posts (1), the transducer assembly installation holes (9) comprise first round holes (901) and key grooves (902), the first round holes (901) are formed in upper portions of the transducer assembly installation holes (9), bottom ends of the transducer assembly installation holes (9) are formed with the key grooves (902) and are provided with second positioning step surfaces (903), and the key grooves (902) are matched with the flat key-shaped protrusions (105);

the upper portions of the transducer assembly installation holes (9) are broached to form second round holes (905), and third positioning step surfaces (908) are formed between the second round holes (905) and the first round holes (901);

the multi-channel ultrasonic flowmeter further comprises second sealing rings (12), polytetrafluoroethylene gaskets (14), disc springs (13) and compression rings (11), the compression rings (11) are in threaded connection with the second round holes (905) and sequentially press the polytetrafluoroethylene gaskets (14) and the disc springs (13) against upper end faces of the stationary posts (1) and the third positioning step surfaces (908), circular grooves (904) are formed in the first round holes (901), and the second sealing rings (12) are arranged in the circular grooves (904);

the multi-channel ultrasonic flowmeter comprises a circuit box (5) arranged outside the pipe housing (10), an integrator is arranged in the circuit box (5), a wire hole (101) and four wiring holes (100) are formed in the pipe housing (10), the wire hole (101) is perpendicular to the pipe housing (10) and is communicated with the circuit box (5), the four transducer assembly installation holes (9) are communicated with the wire hole (101) via the four wiring holes (100), and wire guide holes (104) are formed in the upper portions of the stationary posts (1) and are communicated with the first installation holes (103).

2. The multi-channel ultrasonic flowmeter according to claim 1, wherein the multi-channel ultrasonic flowmeter further comprises plastic covers (16) arranged in the second round holes (905) and located above the compression rings (11), first sealing rings (17) are arranged between the plastic covers (16) and the second round holes (905), a cylinder convexly extending downwards is formed in a middle of each said plastic cover (16) and has a tail end provided with an external thread, the cylinders are in threaded connection with threaded holes in the stationary posts (1), lead-sealed holes (161) are formed in the plastic covers (16), and second lead-sealed holes (111) are formed in the pipe housing (10).