Novel ultrasonic reflection type measuring pipeline

Abstract

The utility model discloses a novel ultrasonic reflection type measuring pipeline which comprises a measuring pipe and a measuring device, the measuring device penetrates into the measuring pipe, ultrasonic transducer assemblies and a measuring device fixing assembly are arranged on the measuring pipe, and the two sides of the measuring device fixing assembly are each provided with one ultrasonic transducer assembly. The measuring device is fixed in the measuring tube by the measuring device fixing assembly; the measuring device comprises a measuring device upper shell and a measuring device lower shell, a middle metal reflector plate is installed in the middle of the measuring device upper shell, the water inlet end and the water outlet end of the measuring device lower shell are each provided with a metal reflector plate, and the metal reflector plates are located below the ultrasonic transducer assembly. The two ultrasonic transducer assemblies, the middle metal reflector plate and the two metal reflector plates form a W-shaped ultrasonic propagation path. The device has the advantages that a W-shaped reflection type propagation path is adopted, a reflector plate device does not need to be installed in the center of the horizontal axis of the measuring tube, and the sectional area of water flow circulation is increased.

Description

Technical Field

[0001] This utility model is a novel ultrasonic reflection measuring pipeline, belonging to the field of flow measurement technology. Background Technology

[0002] Ultrasonic water meters and ultrasonic heat meters are based on the ultrasonic time-of-flight method. They calculate water flow velocity and flow rate by accurately measuring the time difference between the propagation of ultrasonic waves downstream and upstream in flowing water. The core of this method lies in bidirectional ultrasonic transmission and reception. Typically, an ultrasonic transducer (sensor) is installed upstream and downstream of the measuring tube, acting as both transmitter and receiver. Downstream, the ultrasonic signal propagates along the direction of water flow at a speed equal to the speed of sound plus the water flow velocity. Upstream, the ultrasonic signal propagates against the direction of water flow at a speed equal to the speed of sound minus the water flow velocity.

[0003] Currently, many ultrasonic water meters and ultrasonic heat meters (hereinafter collectively referred to as ultrasonic instruments) generally adopt a U-shaped reflection structure for flow measurement. That is, ultrasonic flow measurement is achieved by embedding a stainless steel insert-type reflector and a plastic reduced-diameter tube or a plastic bracket-type reflector and a reduced-diameter tube inside the measuring tube.

[0004] Ultrasonic instruments with a U-shaped reflective structure often suffer from problems due to the presence of a built-in stainless steel insert or plastic bracket (the reflector and the reduced-diameter tube are assembled as one unit) in the measuring tube. The reflector device is located at the center of the entire measuring tube, and the reduced-diameter tube in the middle further obstructs most of the internal space of the ultrasonic instrument's measuring tube. This results in unstable water flow, large pressure loss, and the reflector and bracket being easily entangled by foreign objects in the pipe (such as Teflon tape, hemp rope, etc.), leading to inaccurate ultrasonic measurements. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a new type of ultrasonic reflective measuring pipeline that addresses the above-mentioned shortcomings. It adopts a W-shaped reflective propagation path, which eliminates the need to install the reflector device at the center of the horizontal axis of the measuring tube, increases the cross-sectional area of ​​the water flow, and solves the problems of unstable water flow field, large pressure loss, and inaccurate ultrasonic measurement caused by foreign objects (such as raw rubber tape, hemp rope, etc.) easily getting tangled around the reflector.

[0006] To solve the above technical problems, the present invention adopts the following technical solution:

[0007] A novel ultrasonic reflection-type measuring pipeline includes a measuring tube and a measuring device. The measuring device is inserted into the measuring tube. The measuring tube is provided with an ultrasonic transducer assembly and a measuring device fixing assembly. An ultrasonic transducer assembly is provided on each side of the measuring device fixing assembly. The measuring device fixing assembly fixes the measuring device inside the measuring tube.

[0008] The measuring device includes an upper shell and a lower shell. A middle metal reflector is installed in the middle part of the upper shell. A metal reflector is provided at the inlet and outlet ends of the lower shell. The metal reflectors are located below the ultrasonic transducer assemblies. The two ultrasonic transducer assemblies, the middle metal reflector, and the two metal reflectors form a W-shaped ultrasonic propagation path.

[0009] Furthermore, the upper shell and the lower shell of the measuring device are each provided with a fastening structure, and the upper shell and the lower shell of the measuring device are fastened and assembled through the fastening structure.

[0010] Furthermore, the measuring device has an O-ring placement groove at both ends, and an O-ring is placed in the O-ring placement groove. After the upper shell and lower shell of the measuring device are fastened together, the O-ring is put into the O-ring placement groove.

[0011] Furthermore, the middle part of the measuring device is reduced in diameter, and the upper shell of the measuring device is provided with a middle reflective base at the middle diameter reduction point. The middle metal reflective sheet is embedded into the middle reflective base by an integral injection molding process.

[0012] Furthermore, the measuring device has a reflective base at both the inlet and outlet ends of the lower shell, and the metal reflective sheet is embedded into the reflective base using an integral injection molding process.

[0013] Furthermore, the measuring tube is provided with a measuring device fixing hole, and an ultrasonic transducer mounting hole is provided on each side of the measuring device fixing hole. The measuring device fixing assembly fixes the measuring device through the measuring device fixing hole, and the ultrasonic transducer mounting hole is used to install the ultrasonic transducer assembly.

[0014] Furthermore, the upper shell of the measuring device is provided with an arc-shaped opening at the water inlet end and the water outlet end, respectively. The positions of the two arc-shaped openings correspond to the arc surface of the upper shell of the measuring device, which is projected onto the bottom diameter of the ultrasonic transducer mounting hole. The arc-shaped openings and the ultrasonic transducer mounting hole are coaxially aligned.

[0015] Furthermore, a circular groove is provided in the middle of the upper shell of the measuring device. The circular groove is coaxially aligned with the measuring device fixing hole. The circular groove fixes, limits, and seals the entire measuring device through the measuring device fixing hole of the measuring tube and the measuring device fixing assembly.

[0016] Furthermore, the measuring device fixing assembly includes a locking bolt and a sealing ring. The locking bolt passes through the measuring device fixing hole and is inserted into the circular groove to fix the measuring device, and is sealed by the sealing ring.

[0017] Furthermore, the cross-section of the measuring device, except for the reflective base area, still exhibits a circular cross-section in other areas.

[0018] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:

[0019] 1. The measuring device adopts a W-shaped reflective propagation path, which eliminates the need to install the reflector at the center of the horizontal axis of the measuring tube. This increases the cross-sectional area of ​​the water flow and solves the problems of unstable water flow field, large pressure loss, and inaccurate ultrasonic measurement caused by foreign objects (such as raw rubber tape, hemp rope, etc.) easily getting tangled around the reflector.

[0020] 2. The measuring device and measuring tube are designed separately. The measuring device is detachably fixed inside the measuring tube through the measuring device fixing component, which makes installation simple and easy to replace.

[0021] 3. The measuring device is made of plastic injection molding. The reflective measuring device consists of two parts: an upper shell and a lower shell. The upper shell and the lower shell are connected by a snap-fit ​​structure, which is simple and easy to assemble, thus improving the efficiency of the production process.

[0022] 4. The three metal reflectors of the measuring device are placed on the mold in advance and injected as a whole before plastic injection molding. There is no need to use adhesive to fix the metal reflectors, which improves the fixing strength and the accuracy of the fixing position of the metal reflectors.

[0023] 5. Except for the reflector base area, the cross-section of the measuring device still presents a circular cross-section. Through flow field simulation, compared with the square cross-section scheme, it improves the flow capacity of water, reduces flow resistance, enhances the stability of the flow field, and avoids the eddy and turbulence problems caused by the presence of right angles in the square cross-section case. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0025] Figure 1 This is the assembly drawing of the ultrasonic reflection measuring pipeline in this utility model;

[0026] Figure 2 This is a cross-sectional view of the ultrasonic reflection measuring pipeline in this utility model;

[0027] Figure 3 This is a schematic diagram of the measuring device in this utility model;

[0028] Figure 4 This is a top-view structural diagram of the measuring device in this utility model;

[0029] Figure 5 In this utility model Figure 4 Cross-sectional view of the measuring device in the AA direction;

[0030] Figure 6 In this utility model Figure 4 Cross-sectional view of the measuring device in the BB direction;

[0031] Figure 7 This is the assembly drawing of the measuring device in this utility model. Detailed Implementation

[0032] Example 1, as Figure 1 and Figure 2 As shown, a novel ultrasonic reflection measurement pipeline includes a measurement tube 1 and a measurement device 5. The measurement device 5 is inserted into the measurement tube 1. The measurement tube 1 is provided with an ultrasonic transducer assembly 2 and a measurement device fixing assembly 3. An ultrasonic transducer assembly 2 is provided on each side of the measurement device fixing assembly 3. The measurement device fixing assembly 3 fixes the measurement device 5 inside the measurement tube 1.

[0033] The measuring tube 1 is provided with a measuring device fixing hole 102, and an ultrasonic transducer mounting hole 101 is provided on each side of the measuring device fixing hole 102. The measuring device fixing assembly 3 fixes the measuring device 5 through the measuring device fixing hole 102, and the ultrasonic transducer mounting hole 101 is used to install the ultrasonic transducer assembly 2.

[0034] The ultrasonic transducer assembly 2 includes a clamping screw sleeve 201, an ultrasonic transducer 202, and a rubber sealing gasket 203. The rubber sealing gasket 203 is fitted onto the ultrasonic transducer 202, and then the entire assembly is placed inside the ultrasonic transducer mounting hole 101 of the measuring tube 1. Finally, it is clamped and sealed by the clamping screw sleeve 201.

[0035] like Figures 3 to 7 As shown, the measuring device 5 includes an upper housing 501 and a lower housing 502. Each of the upper housing 501 and the lower housing 502 is provided with a fastening structure 510. The upper housing 501 and the lower housing 502 are fastened together by the fastening structure 510.

[0036] The measuring device 5 has an O-ring placement groove 508 at both ends, and an O-ring 4 is placed in the O-ring placement groove 508. After the upper shell 501 and the lower shell 502 of the measuring device are fastened together, the O-ring 4 is put into the O-ring placement groove 508 to seal and fix the upper shell 501 and the lower shell 502 of the measuring device.

[0037] The middle part of the measuring device 5 is reduced in diameter. The upper shell 501 of the measuring device is provided with a middle reflective base 505 at the middle diameter reduction. The bottom of the middle reflective base 505 is provided with a middle metal reflective sheet 506. The middle metal reflective sheet 506 is embedded into the middle reflective base 505 by an integral injection molding process.

[0038] The measuring device has an arc-shaped opening 507 at the inlet and outlet ends of the upper shell 501. The positions of the two arc-shaped openings 507 correspond to the arc surface of the upper shell 501 of the measuring device, which is projected onto the bottom diameter of the ultrasonic transducer mounting hole 101. The two arc-shaped openings 507 are designed to prevent the ultrasonic transducer assembly from effectively transmitting and receiving signals in the water flow, and also serve as auxiliary positioning functions of the measuring device.

[0039] A circular groove 509 is provided in the middle of the upper shell 501 of the measuring device. The circular groove 509 fixes, limits and seals the entire measuring device 5 through the measuring device fixing hole 102 of the measuring tube 1 and the measuring device fixing assembly 3.

[0040] The measuring device has a reflective base 503 at both the inlet and outlet ends of the lower housing 502. A metal reflective sheet 504 is installed on the reflective base 503. The metal reflective sheet 504 is located below the arc-shaped opening 507 and is embedded into the reflective base 503 by an integral injection molding process.

[0041] Except for the reflective base area, the cross-section of the measuring device 5 is still circular, which improves the flow capacity of water, reduces flow resistance, enhances the stability of the flow field, and avoids the eddies and turbulence problems caused by the presence of right angles in the case of a square cross-section.

[0042] After the measuring device 5 is assembled with the O-ring 4, it is inserted into the measuring tube 1. The two arc-shaped openings 507 of the measuring device 5 are coaxially fitted with the ultrasonic transducer mounting hole 101. The metal reflector 504 is located below the ultrasonic transducer assembly 2. The circular groove 509 of the measuring device 5 is coaxially fitted with the measuring device fixing hole 102.

[0043] The measuring device fixing assembly 3 includes a locking bolt 301 and a sealing ring 302. The locking bolt 301 passes through the measuring device fixing hole 102 and is inserted into the circular groove 509 to fix the measuring device 5. The sealing ring 302 seals the measuring device 5, which not only ensures the fixing of the measuring device 5, but also prevents liquid from seeping out of the water meter pipe section.

[0044] The two ultrasonic transducers 203 of the ultrasonic transducer assembly 2, together with the two metal reflectors 504 and the intermediate metal reflector 506 of the measuring device 5, constitute the ultrasonic propagation path of the entire measuring instrument.

[0045] The description of this utility model is given for illustrative and descriptive purposes only, and is not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the utility model, and to enable those skilled in the art to understand the utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A novel ultrasonic reflective measuring pipe, characterized by: The utility model provides a kind of ultrasonic flowmeter, including measuring tube (1) and measuring device (5), measuring device (5) is inlaid into measuring tube (1), and measuring tube (1) is equipped with ultrasonic transducer assembly (2) and measuring device fixed assembly (3), and the two sides of measuring device fixed assembly (3) are equipped with ultrasonic transducer assembly (2), and measuring device fixed assembly (3) is fixed in measuring tube (1) with measuring device (5); The measuring device (5) includes a measuring device upper shell (501) and a measuring device lower shell (502), the measuring device upper shell (501) is provided with an intermediate metal reflector (506) in the middle portion, the measuring device lower shell (502) is provided with a metal reflector (504) at the inlet end and the outlet end, the metal reflector (504) is located below the ultrasonic transducer assembly (2), the two ultrasonic transducer assemblies (2), the intermediate metal reflector (506), and the two metal reflectors (504) form a W-shaped ultrasonic propagation path.

2. A novel ultrasonic reflective measuring pipe according to claim 1, characterized in that: The measuring device upper shell (501) and the measuring device lower shell (502) are each provided with a buckling structure (510), and the measuring device upper shell (501) and the measuring device lower shell (502) are assembled by buckling through the buckling structure (510).

3. A novel ultrasonic reflective measuring pipe according to claim 2, characterized in that: The measuring device (5) is provided with an O-ring placing groove (508) at both ends, and an O-ring (4) is placed in the O-ring placing groove (508), and the O-ring (4) is sleeved into the O-ring placing groove (508) after the measuring device upper shell (501) and the measuring device lower shell (502) are assembled by buckling.

4. A novel ultrasonic reflective measuring pipe according to claim 1, characterized in that: The middle portion of the measuring device (5) is subjected to a diameter reduction treatment, the measuring device upper shell (501) is provided with an intermediate reflection base (505) at the intermediate diameter reduction portion, and the intermediate metal reflector (506) is embedded on the intermediate reflection base (505) by an integral injection molding process.

5. A novel ultrasonic reflective measuring pipe according to claim 1, characterized in that: The measuring device lower shell (502) is provided with a reflection base (503) at the inlet end and the outlet end, and the metal reflector (504) is embedded on the reflection base (503) by an integral injection molding process.

6. A novel ultrasonic reflective measuring pipe according to claim 1, characterized in that: The measuring tube (1) is provided with a measuring device fixing hole (102), the measuring device fixing hole (102) is provided with an ultrasonic transducer mounting hole (101) at both sides, the measuring device (5) is fixed by the measuring device fixing hole (102) through the measuring device fixing assembly (3), and the ultrasonic transducer mounting hole (101) is used for mounting the ultrasonic transducer assembly (2).

7. A novel ultrasonic reflective measuring pipe according to claim 6, characterized in that: The measuring device upper shell (501) is provided with an arc-shaped opening (507) at the inlet end and the outlet end, respectively, the positions of the two arc-shaped openings (507) correspond to the arc surface of the measuring device upper shell (501) where the bottom diameters of the ultrasonic transducer mounting holes (101) are projected, and the arc-shaped openings (507) and the ultrasonic transducer mounting holes (101) are coaxially matched.

8. A novel ultrasonic reflective measuring pipe according to claim 6, characterized in that: The middle of the measuring device upper shell (501) is provided with a circular groove (509), which is coaxially matched with the measuring device fixing hole (102), and the circular groove (509) is fixed, limited and sealed to the whole measuring device (5) through the measuring device fixing hole (102) of the measuring tube (1) and the measuring device fixing assembly (3).

9. A novel ultrasonic reflective measuring pipe according to claim 8, characterized in that: The measuring device fixing assembly (3) comprises a locking bolt (301) and a sealing ring (302), the locking bolt (301) is inserted into the circular groove (509) through the measuring device fixing hole (102) for fixing the measuring device (5), and the sealing ring (302) is sealed.

10. A novel ultrasonic reflective measuring pipe according to claim 5, characterized in that: The cross section of the measuring device (5) is circular except the reflection base area.

Images