Ultrasonic flow channel structure and ultrasonic water meter with same

Abstract

The ultrasonic flow channel structure comprises a shell, a pipe core and a reflector plate, the shell is provided with a pipe core installation hole used for installing the pipe core, the pipe core is provided with a measuring flow channel hole, a clamping groove is formed in the side wall of the pipe core, the reflector plate is embedded into the clamping groove, and the shell is provided with a flow channel hole. And the inner surface of the reflector plate is flush with the hole wall of the measuring flow channel hole. And the whole structure is relatively simplified, the installation is convenient, the production and assembly process difficulty is low, the implementation is convenient, and the practicability is better.

Description

Technical Field

[0001] The utility model relates to the field of ultrasonic water meters, in particular to an ultrasonic flow channel structure and an ultrasonic water meter with the structure. Background Art

[0002] The ultrasonic flow channel is a critical component of ultrasonic water meters, directly impacting the metering performance. The reflector structure of traditional ultrasonic small meters is complex, making dimensional accuracy difficult to ensure and resulting in poor consistency. It is fixed within the flow channel via a bracket, creating flow obstruction and significant pressure loss. To improve the metering performance of ultrasonic water meters, the applicant previously filed a patent application, patent number CN218443998U, entitled "Ultrasonic Flow Channel and Ultrasonic Water Meter." This application primarily addresses these issues by integrating the reflector into an integral injection mold. However, the applicant's research revealed two remaining issues: 1. The reflector is plasticized integrally with the tube core, making it difficult to position in the mold and potentially scratching the reflector during demolding, significantly increasing the process complexity and making quality assurance difficult. 2. During the injection molding process, glue can escape from the junction between the tube core and the reflector, easily contaminating the reflector surface and making cleaning difficult, which can also affect the reflector's reflective quality. Utility Model Content

[0003] In view of this, the present invention provides an ultrasonic flow channel structure and an ultrasonic water meter with the structure, aiming to solve the problem that the current ultrasonic water meter flow channel structure has high difficulty in processing technology and difficult to ensure quality.

[0004] To achieve the above purpose, the technical solution of this utility model is as follows:

[0005] An ultrasonic flow channel structure and an ultrasonic water meter with the structure, comprising a shell, a tube core and a reflector. The shell has a tube core mounting hole for mounting the tube core, and the tube core has a measuring flow channel hole. The key is that: a groove is provided on the side wall of the tube core, the reflector is embedded in the groove, and the inner surface of the reflector is flush with the hole wall of the measuring flow channel hole.

[0006] With the above solution, the reflector is embedded, which avoids damage to the reflector during the integrated plasticizing process, is conducive to ensuring the metering quality of the finished meter, and at the same time reduces the difficulty of the production and assembly process, making it easier to implement.

[0007] Preferably, the reflector sheet includes a central working portion and support portions symmetrically disposed on either side of the central working portion, wherein the end faces and outer side faces of the support portions respectively abut against the bottom and side faces of the slot. With the above solution, the support portions of the reflector sheet adopt a symmetrical structure, which is beneficial for improving the reflector sheet itself and the installation stability.

[0008] As a preferred embodiment, the end surface of the support portion is parallel to the surface of the intermediate working portion. The above solution is beneficial to ensuring the position accuracy of the intermediate working portion and improving the measurement accuracy.

[0009] Preferably, a fastener is included, wherein the fastener has a pressing surface against the reflector and a fastening structure matched with the tube core. With the above solution, the fastener further ensures the installation reliability of the reflector and prevents it from falling off during press-fitting and use.

[0010] Preferably, a main body reinforcement rib is provided at a position corresponding to the slot on the outside of the tube core, and the main body reinforcement rib extends along the length of the tube core. The above solution is beneficial to improving the overall strength of the tube core and ensuring a longer service life.

[0011] As a preferred embodiment, the fastener has fastening grooves at both ends adapted to the main body reinforcement ribs. The above solution is beneficial to further improve the assembly speed, that is, improve the production efficiency.

[0012] Preferably, the fastening groove is formed by two ribs, and the outer side of the ribs is an arc surface adapted to the diameter of the inner hole of the shell. With the above solution, the fastener can better fit the inner wall of the shell, prevent loosening, and have better installation stability.

[0013] As a preferred embodiment, a circular chamfer is provided between the working portion and the supporting portion. With the above solution, the circular chamfer can reduce corner erosion, reduce resistance, etc.

[0014] As a preferred embodiment, the housing and the tube core have mutually cooperating positioning structures. The above solution is beneficial to improving the efficiency of tube core assembly.

[0015] This application also proposes an ultrasonic water meter. Key features of this device include the aforementioned ultrasonic flow channel structure and two transducer mounting holes on the housing. The axes of the two transducer mounting holes are parallel to each other and form an angle of 35° to 45° with the axis of the core mounting hole. This provides improved reflection measurement accuracy.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The ultrasonic flow channel structure and the ultrasonic water meter with the structure provided by the utility model have a relatively simpler overall structure, are easy to install, have low production and assembly process difficulty, are easy to implement, and have good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 for Figure 1 Axial cross-section view;

[0020] Figure 3 for Figure 1 Radial cross-section view;

[0021] Figure 4 Schematic diagram of the tube core structure;

[0022] Figure 5 is a cross-sectional view of the tube core;

[0023] Figure 6 This is a schematic diagram of installing the reflector on the tube die;

[0024] Figure 7 This is a cross-sectional view of the reflector installation in the figure;

[0025] Figure 8 A schematic diagram of fastening the fastener on the tube core;

[0026] Figure 9 for Figure 8 Cross-sectional view of fastener installation;

[0027] Figure 10 Schematic diagram of the reflector structure;

[0028] Figure 11 is a side view of the reflector;

[0029] Figure 12 is a schematic diagram of the three-dimensional structure of the fastener;

[0030] Figure 13 for Figure 12 Side view;

[0031] Figure 14 Schematic diagram of the shell structure. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0033] refer to Figure 1 and Figure 14 The ultrasonic flow channel structure shown mainly includes a shell 100, a tube core 200 and a reflector 300, wherein the shell 100 has a tube core mounting hole 110 for installing the tube core 200, and the tube core 200 has a measuring flow channel hole 210. In this application, the cross-section of the measuring flow channel hole 210 is roughly square, and its four inner corners have arc chamfers. The key to this application is that there is a slot 220 on the side wall of the tube core 200, and the reflector 300 is embedded in the corresponding slot 220, and the inner surface of the reflector 300 is flush with the hole wall of the measuring flow channel hole 210.

[0034] Specifically, in this embodiment, the reflector 300 includes a middle working portion 310 and support portions 320 symmetrically arranged on both sides of the middle working portion 310 . The end faces and outer side faces of the support portions 320 respectively abut against the bottom and side faces of the slot 220 .

[0035] During implementation, the end face of the support portion 320 is parallel to the surface of the middle working portion 310, that is, the length direction of the support portion 320 is perpendicular to the working portion 310. In addition, there is a circular chamfer between the working portion 310 and the support portion 320, and the circular chamfer is adapted to the circular chamfers of the four corners inside the measuring flow channel hole 210. This can further ensure that the inner surface of the reflector 300 is flush with the hole wall of the measuring flow channel hole 210, avoiding protrusions that increase resistance and wear, etc. It should be noted that after removing the circular chamfered part, the actual working area of ​​the working portion 310 as the reflecting surface can still cover the diameter of the transducer probe.

[0036] In a further preferred embodiment, the reflector 300 is fixed relative to the tube core 200 by a fastener 400. As shown in the figure, the fastener 400 has a pressing surface 410 that presses against the reflector 300, and a fastening structure that cooperates with the tube core 200. Usually, the size of the pressing surface 410 is adapted to the working part 310, which can fully support the working part 310, better ensure its stability, prevent deflection, etc.

[0037] A main body reinforcement rib 230 is provided at a position corresponding to the card slot 220 on the outside of the tube core 200, and the main body reinforcement rib 230 extends along the length direction of the tube core 200. As shown in the figure, the four sides of the tube core 200 all have main body reinforcement ribs 230, and the main body reinforcement rib 230 is close to the middle of the corresponding side. Both ends of the fastener 400 have fastening grooves 420 adapted to the main body reinforcement rib 230. As shown in the figure, the fastening groove 420 is formed by two rib plates 430, and the outer side of the rib plate 430 is an arc surface adapted to the inner hole diameter of the shell 100. The fastener 400 is fastened with the help of the main body reinforcement rib 230, which on the one hand improves the strength of the tube core 200, and on the other hand is conducive to improving assembly efficiency and simplifying the overall structure.

[0038] Furthermore, the housing 100 and the tube core 200 have a mutually cooperating positioning structure. Specifically, as shown in the figure, the tube core 200 has a positioning boss 240 on the circumferential outer side of the end portion. The positioning boss 240 extends along the length of the tube core 200, while the housing 100 has a positioning groove 130 on the inner side of the end portion that cooperates with the positioning boss 240.

[0039] Based on the above-mentioned ultrasonic flow channel structure, the present application also proposes an ultrasonic water meter, which mainly includes the above-mentioned ultrasonic flow channel structure, and has two transducer mounting holes 120 on the shell 100. The axes of the two transducer mounting holes 120 are parallel to each other, and the angle between them and the axis of the tube core mounting hole 110 is 35°~45°.

[0040] refer to Figures 1 to 14 The ultrasonic flow channel structure shown and the ultrasonic water meter with the structure, wherein the reflector 10 is made of stainless steel with a coating on the surface, the inner side of the working part 310 is not coated, the tube core 200 and the fastener 400 are both plastic parts, which are injection molded, wherein the slot 220 on the tube core 200 is injection molded together, and secondary reinforcing ribs 250 are provided on both radial outer sides of the slot 220 to further improve the strength of the slot 220 position.

[0041] During assembly, the reflector 300 is installed in the corresponding slot 220, and then the outer side of the reflector 300 is fixed by the fastener 400. Finally, after the positioning boss 240 is aligned with the positioning groove 130, the tube core 200 is inserted into the shell 100 together, and the inner wall of the shell 100 and the outer side of the rib 430 of the fastener 400 are used to achieve the overall fixing effect.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention. Such changes fall within the scope of protection of the present invention.

Claims

1. An ultrasonic flow channel structure, comprising a housing (100), a tube core (200) and a reflector (300), wherein the housing (100) has a tube core mounting hole (110) for mounting the tube core (200), and the tube core (200) has a measurement flow channel hole (210), characterized in that: A slot (220) is provided on the side wall of the tube core (200), the reflective sheet (300) is embedded in the slot (220), and the inner surface of the reflective sheet (300) is flush with the hole wall of the measurement flow channel hole (210).

2. The ultrasonic flow channel structure according to claim 1, characterized in that: The reflective sheet (300) comprises a middle working portion (310) and support portions (320) symmetrically arranged on both sides of the middle working portion (310), wherein the end face and outer side face of the support portion (320) respectively abut against the bottom and side face of the card slot (220).

3. The ultrasonic flow channel structure according to claim 2, characterized in that: The end surface of the supporting portion (320) is parallel to the surface of the middle working portion (310).

4. The ultrasonic flow channel structure according to any one of claims 1 to 3, characterized in that: The invention comprises a fastener (400), wherein the fastener (400) has a pressing surface (410) pressing against the reflective sheet (300), and a fastening structure cooperating with the tube core (200).

5. The ultrasonic flow channel structure according to claim 4, characterized in that: A main body reinforcement rib (230) is provided on the outside of the tube core (200) at a position corresponding to the clamping slot (220), and the main body reinforcement rib (230) extends along the length direction of the tube core (200).

6. The ultrasonic flow channel structure according to claim 5, characterized in that: The fastener (400) has fastening grooves (420) at both ends adapted to the main body reinforcement ribs (230).

7. The ultrasonic flow channel structure according to claim 6, characterized in that: The fastening groove (420) is formed by enclosing two ribs (430), and the outer side of the rib (430) is an arc surface adapted to the diameter of the inner hole of the shell (100).

8. The ultrasonic flow channel structure according to claim 2 or 3, characterized in that: A circular chamfer is formed between the working portion (310) and the supporting portion (320).

9. The ultrasonic flow channel structure according to any one of claims 1 to 3, characterized in that: The housing (100) and the tube core (200) have mutually matched positioning structures.

10. An ultrasonic water meter, characterized in that: The ultrasonic flow channel structure has any one of claims 1 to 9, and the housing (100) has two transducer mounting holes (120), the axes of the two transducer mounting holes (120) are parallel to each other, and the angle between the axes of the two transducer mounting holes (120) and the axis of the tube core mounting hole (110) is 35° to 45°.

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