Ultrasonic water meter signal sensor and ultrasonic water meter thereof

Abstract

The utility model discloses an ultrasonic water meter signal sensor and an ultrasonic water meter thereof, and belongs to the technical field of water meter processing. The ultrasonic transducer mainly comprises an ultrasonic transducer shell, a correlation slope is arranged at the upper end of the ultrasonic transducer shell, a piezoelectric element corresponding to the correlation slope is connected into the ultrasonic transducer shell in a sealed mode, an external lead is connected to the piezoelectric element, and a fixing seat assembly used for limiting and fixing the piezoelectric element is arranged at the bottom of the piezoelectric element. An external lead penetrates through the fixing seat assembly in a sealed mode, and the fixing seat assembly is fixedly connected with the inner side wall of the ultrasonic transducer shell in a sealed mode. According to the ultrasonic water meter signal sensor, copper sleeve fixing is omitted, the precision requirement for part machining is lowered, the machining difficulty is greatly lowered, meanwhile, the ultrasonic water meter signal sensor is installed in a direct insertion mode, the measuring signal length of the sensor is increased, and the measuring precision is improved by 3-5 times.

Description

Technical Field

[0001] The utility model belongs to the technical field of water meter processing. Specifically, it particularly relates to an ultrasonic water meter signal sensor and an ultrasonic water meter thereof. Background Technique

[0002] An ultrasonic water meter is a water meter that measures flow using the ultrasonic time difference principle. It detects the time difference generated by the change in the speed of the ultrasonic beam when propagating downstream and upstream in water, analyzes and processes these data to obtain the water flow velocity, and further calculates the water flow rate.

[0003] The patent with the authorization announcement number "CN217403515U" discloses a through-beam ultrasonic water meter pipe section. On both sides of the water meter pipe section, a detection pipe extending into the interior of the water meter pipe section is fixedly welded. Both detection pipes are inclined and located on the same straight line. A detection chamber is opened inside the detection pipe. A detachable transducer carrier is inserted inside the detection pipe. A pipe seal is also provided inside the detection chamber to fill the gap between the transducer carrier and the inner wall of the detection chamber. This structure can avoid the problem of shortened life of the ultrasonic transducer due to long-term immersion in the fluid, and the method of matching the detection pipe with the transducer carrier is easy to replace the ultrasonic transducer.

[0004] However, the above water meter pipe section still has the following problems during use: 1. When installing the transducer, it needs to be fixed with a copper sleeve (carrier). There needs to be a certain installation tolerance between the transducer and the copper sleeve, and there also needs to be a certain installation tolerance between the copper sleeve and the detection pipe. This requires high precision in mechanical processing of each component, resulting in a relatively long production process of the sensor. Once there is a machining error in the mechanical components, it will lead to a very low overall signal strength or no signal, and the product quality cannot be guaranteed; 2. The above detection pipe is inclined, resulting in the transducer can only be installed in an inclined insertion manner, shortening the effective measurement signal length of the transducer, and thus leading to a lower measurement accuracy; 3. Using a copper sleeve to fix the transducer leads to an increase in the number of parts that need to be sealed, an increase in the water leakage ratio of the water meter, and serious flow disturbance phenomenon of the sensor. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: To overcome the deficiencies of the prior art, provide an ultrasonic water meter signal sensor and an ultrasonic water meter thereof, which eliminate the copper sleeve fixation, reduce the precision requirements for mechanical processing of components, greatly reduce the processing difficulty. At the same time, the ultrasonic water meter signal sensor adopts a direct insertion installation method, lengthening the measurement signal length of the sensor, and increasing the measurement accuracy by 3 - 5 times.

[0006] The described ultrasonic water meter signal sensor includes an ultrasonic transducer housing. An opposed inclined surface is provided at the upper end of the ultrasonic transducer housing. A piezoelectric element corresponding to the opposed inclined surface is hermetically connected inside the ultrasonic transducer housing. An external lead is connected to the piezoelectric element. A fixing seat assembly for limiting and fixing it is provided at the bottom of the piezoelectric element. The external lead hermetically passes through the fixing seat assembly, and the fixing seat assembly is hermetically and fixedly connected to the inner side wall of the ultrasonic transducer housing.

[0007] Preferably, a cavity is provided inside the ultrasonic transducer housing. An installation inclined surface parallel to the opposed inclined surface is provided at the upper end of the cavity. A plurality of fixing protrusions for cooperating with the end face of the piezoelectric element are fixedly connected to the installation inclined surface. An adhesive is filled between the piezoelectric element and the installation inclined surface.

[0008] Preferably, an upper stop platform for limiting one end of the piezoelectric element is provided on the installation inclined surface.

[0009] Preferably, the fixing seat assembly includes a fixing seat body. A fixing inclined surface parallel to the installation inclined surface is provided at the upper end of the fixing seat body. A lower stop platform for limiting the other end of the piezoelectric element is provided on the fixing inclined surface. A lead hole for the external lead to pass through is provided on the fixing seat assembly, and the lead hole is a stepped hole.

[0010] Preferably, a guiding strip is fixedly connected to the inner side wall of the ultrasonic transducer housing. The length direction of the guiding strip is parallel to the axis of the ultrasonic transducer housing. A guiding groove cooperating with the guiding strip is provided on the outer side wall of the fixing seat body.

[0011] Preferably, a clamping platform is fixedly connected to the lower end of the ultrasonic transducer housing. The clamping platform is of an annular structure. A limiting block for installation and limitation is fixedly connected to the clamping platform. A plurality of clamping grooves are provided on the outer side wall of the clamping platform.

[0012] The described ultrasonic water meter includes a water meter body. Detection chambers are respectively provided on both sides of the water meter body. A plurality of groups of detection holes are respectively provided in the two detection chambers on both sides. The described ultrasonic water meter signal sensor is installed in each detection hole and is hermetically and fixedly connected through a locking nut. The opposed inclined surfaces of the ultrasonic water meter signal sensors in two detection holes located in the same cross-section and at diagonal positions are parallel to each other.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model omits the copper sleeve fixation, that is, the ultrasonic water meter signal sensor directly cooperates with the detection hole. On the one hand, it reduces the precision requirements for mechanical processing of components, reduces the processing difficulty, and shortens the production process of the sensor; on the other hand, the direct insertion structure greatly improves the measurement accuracy of the water meter, increasing the measurement accuracy by 3 - 5 times.

[0015] 2. The ultrasonic water meter signal sensor is equipped with an opposed inclined plane with an inclined setting, so that the detection chamber of the water meter does not need to be inclined, which is more convenient for processing. At the same time, the detection chamber is vertically arranged with the water meter pipeline, which also enables the ultrasonic water meter signal sensor to be installed in a direct insertion manner, making the installation more convenient. Brief Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall external structure of the ultrasonic water meter signal sensor;

[0017] Figure 2 is a schematic diagram of the disassembled structure of the ultrasonic water meter signal sensor;

[0018] Figure 3 is a schematic diagram of the internal structure of the ultrasonic transducer housing;

[0019] Figure 4 is a schematic diagram of the front structure of the fixed seat assembly;

[0020] Figure 5 is a schematic diagram of the side structure of the fixed seat assembly;

[0021] Figure 6 is a schematic diagram of the structure of the ultrasonic water meter;

[0022] Figure 7 is a schematic diagram of the installation of the detection hole and the ultrasonic water meter signal sensor in the ultrasonic water meter;

[0023] Figure 8 is Figure 7 a partial enlarged view of part A in

[0024] Figure 9 is a schematic diagram of the internal structure of the ultrasonic water meter.

[0025] In the figure, 1. Ultrasonic transducer housing; 101. Clamping platform; 102. Limit block; 103. Card slot; 104. Opposed inclined plane; 105. Transducer body; 106. Installation inclined plane; 107. Fixed protrusion; 108. Guide strip; 109. Upper retaining platform; 2. External lead; 3. Fixed seat assembly; 301. Fixed inclined plane; 302. Lead hole; 303. Fixed seat body; 304. Guide groove; 305. Lower retaining platform; 4. Piezoelectric element; 5. Water meter body; 6. Detection chamber; 601. Thread; 602. Limit groove; 7. Locking nut. Detailed Embodiment

[0026] The following further describes the present invention with reference to the accompanying drawings:

[0027] In the paragraphs with detailed descriptions, the orientation nouns involved are only for the convenience of those skilled in the art to understand the technical solutions described in this application according to the visual orientation shown in the drawings. Unless otherwise clearly specified and limited, terms such as "set", "installed", "connected", etc. should be understood in a broad sense. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] Embodiment 1:

[0029] As Figures 1 to 5 shown, an ultrasonic water meter signal sensor includes an ultrasonic transducer housing 1. The ultrasonic transducer housing 1 is used to install and protect the piezoelectric element 4. The upper end of the ultrasonic transducer housing 1 is provided with an opposed inclined surface 104. When this embodiment is placed vertically, the included angle between the opposed inclined surface 104 and the horizontal plane is preferably 45°. A piezoelectric element 4 corresponding to the opposed inclined surface 104 is hermetically connected inside the ultrasonic transducer housing 1. An external lead 2 is connected to the piezoelectric element 4. A fixing seat assembly 3 for limiting and fixing the piezoelectric element 4 is provided at the bottom of the piezoelectric element 4. The fixing seat assembly 3 is embedded in the ultrasonic transducer housing 1, that is, the fixing seat assembly 3 is in interference fit with the ultrasonic transducer housing 1. The external lead 2 hermetically passes through the fixing seat assembly 3, and the fixing seat assembly 3 is hermetically and fixedly connected to the inner side wall of the ultrasonic transducer housing 1. In this embodiment, the ultrasonic water meter signal sensor is provided with an opposed inclined surface 104 that is inclined. Therefore, the detection chamber of the water meter does not need to be inclined, which is more convenient for processing. At the same time, the detection chamber is perpendicular to the water meter pipeline, which also makes the installation of the ultrasonic water meter signal sensor more convenient.

[0030] As Figure 3 shown, a cavity is formed inside the ultrasonic transducer housing 1, and the piezoelectric element 4 is arranged inside the cavity. Specifically, an installation inclined surface 106 parallel to the opposed inclined surface 104 is provided at the upper end of the cavity. A plurality of fixing protrusions 107 for cooperating with the end face of the piezoelectric element 4 are fixedly connected to the installation inclined surface 106. The fixing protrusions 107 play a role in supporting and limiting, and limit the upper end face of the piezoelectric element 4. An upper stop 109 for limiting the upper side face of the piezoelectric element 4 is provided on the installation inclined surface 106. An adhesive is filled between the piezoelectric element 4 and the installation inclined surface 106. The adhesive is preferably epoxy resin, and epoxy resin has good insulation performance.

[0031] As Figure 4 and Figure 5As shown, the fixed seat assembly 3 includes a fixed seat body 303. At the upper end of the fixed seat body 303, there is a fixed inclined surface 301 arranged parallel to the installation inclined surface 106. On the fixed inclined surface 301, there is a lower retaining platform 305 for limiting the side surface of the other end of the piezoelectric element 4. The lower retaining platform 305 can also limit the lower end surface of the piezoelectric element 4. A lead hole 302 for the external lead 2 to pass through is formed in the fixed seat assembly 3. The lead hole 302 is a stepped hole, and the stepped hole is convenient for filling epoxy resin, so that the epoxy resin can seal and fix the lower end surface of the piezoelectric element 4 and the external lead 2.

[0032] During installation, epoxy resin is poured into the upper end of the cavity, and then the piezoelectric element 4 is placed in, so that the upper end of the piezoelectric element 4 abuts against the upper retaining platform 109, and the upper end surface of the piezoelectric element 4 abuts against the fixed protrusion 107. Epoxy resin is filled on the fixed seat assembly 3, and the fixed seat assembly 3 is pushed into the ultrasonic transducer housing 1. After the epoxy resin solidifies, the sealed and fixed connection between the piezoelectric element 4 and the ultrasonic transducer housing 1 can be realized.

[0033] As Figures 3 to 5 shown, a plurality of uniformly distributed guide bars 108 are fixedly connected to the inner side wall of the ultrasonic transducer housing 1. In this embodiment, preferably four guide bars 108 are provided, and the length direction of the guide bars 108 is parallel to the axis of the ultrasonic transducer housing 1. A guide groove 304 matching with the guide bars 108 is formed on the outer side wall of the fixed seat body 303. By providing the guide bars 108 and the guide grooves 304, it is not only convenient for the installation of the fixed seat assembly 3, but also can prevent the fixed inclined surface 301 from being misaligned with the piezoelectric element 4 during installation.

[0034] A clamping platform 101 is fixedly connected to the lower end of the ultrasonic transducer housing 1. The clamping platform 101 is integrally formed with the transducer body 105. The clamping platform 101 is of an annular structure. A limiting block 102 for installation limit is fixedly connected to the clamping platform 101. The limiting block 102 is used for position limit when cooperating with the water meter body 5, so as to better determine the angle of the opposite inclined surface 104. A plurality of clamping grooves 103 are formed on the outer side wall of the clamping platform 101, and the clamping grooves 103 make the installation of the ultrasonic water meter signal sensor more convenient and firm.

[0035] Embodiment 2: As Figures 6 to 9 shown, an ultrasonic water meter includes a water meter body 5. Detection chambers 6 are respectively arranged on both sides of the water meter body 5. A plurality of groups of detection holes are respectively formed in the two detection chambers 6 on both sides. In this embodiment, two groups of detection holes are provided at each cross-sectional position, and the axes of the detection holes are perpendicular to the axis of the water meter body 5. Threads 601 are formed in the detection holes. An ultrasonic water meter signal sensor described in Embodiment 1 is installed in each detection hole and is hermetically and fixedly connected through a locking nut 7. As Figure 9As shown, the opposite inclined surfaces 104 of the ultrasonic water meter signal sensors in two detection holes located in the same cross-section and at diagonal positions are arranged in parallel. The utility model detects the flow rate of the liquid in the water meter by the opposite radiation of two ultrasonic water meter signal sensors at diagonal positions.

[0036] To facilitate the installation of two corresponding ultrasonic water meter signal sensors and the accurate cooperation of the opposite inclined surfaces 104, a limit groove 602 matching with the limit block 102 is formed in the detection hole.

[0037] When the utility model is installed, the ultrasonic water meter signal sensor is inserted into the detection hole in a direct insertion manner. The direct insertion installation maximally elongates the measurement signal length of the sensor, and effectively improves the measurement accuracy of the ultrasonic water meter by 3 to 5 times. The limit block 102 on the ultrasonic transducer housing 1 is installed along the limit groove 602, so that the two corresponding ultrasonic water meter signal sensors after installation do not need to be debugged again, and the installation is convenient. Finally, the locking nut 7 is tightened to complete the sealing and fixing of the ultrasonic water meter signal sensor.

[0038] The utility model omits the copper sleeve, that is, the ultrasonic water meter signal sensor directly cooperates with the detection hole. On the one hand, it reduces the precision and processing difficulty of the mechanical processing requirements of the components and shortens the production process of the sensor; on the other hand, the direct insertion structure greatly improves the measurement accuracy of the water meter. Finally, although this specification is described according to the embodiments, not each embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An ultrasonic water meter signal sensor, comprising an ultrasonic transducer housing (1), characterized in that: The upper end of the ultrasonic transducer housing (1) is provided with a reflection bevel (104), a piezoelectric element (4) corresponding to the reflection bevel (104) is sealed and connected inside the ultrasonic transducer housing (1), an external lead (2) is connected to the piezoelectric element (4), a fixing seat assembly (3) for limiting and fixing the piezoelectric element (4) is provided at the bottom of the piezoelectric element (4), the external lead (2) passes through the fixing seat assembly (3), the fixing seat assembly (3) is sealed and fixedly connected to the inner side wall of the ultrasonic transducer housing (1), and the ultrasonic transducer housing (1) is provided with a fixing seat assembly (3) for limiting and fixing the piezoelectric element (4). ) is provided with a cavity, the upper end of the cavity is provided with a mounting bevel (106) parallel to the opposing bevel (104), the mounting bevel (106) is provided with an upper stop (109) for limiting one end of the piezoelectric element (4), the fixed seat assembly (3) comprises a fixed seat body (303), the upper end of the fixed seat body (303) is provided with a fixing bevel (301) arranged parallel to the mounting bevel (106), and the fixing bevel (301) is provided with a lower stop (305) for limiting the other end of the piezoelectric element (4).

2. The ultrasonic water meter signal sensor according to claim 1, characterized in that: A plurality of fixing protrusions (107) for matching with the end surface of the piezoelectric element (4) are fixedly connected to the mounting inclined surface (106), and an adhesive is filled between the piezoelectric element (4) and the mounting inclined surface (106).

3. The ultrasonic water meter signal sensor according to claim 2, characterized in that: The fixing seat assembly (3) is provided with a lead hole (302) for the external lead wire (2) to pass through, and the lead hole (302) is a stepped hole.

4. The ultrasonic water meter signal sensor according to claim 3, characterized in that: A guide bar (108) is fixedly connected to the inner side wall of the ultrasonic transducer housing (1), the length direction of the guide bar (108) is parallel to the axis of the ultrasonic transducer housing (1), and a guide groove (304) matching with the guide bar (108) is provided on the outer side wall of the fixing seat body (303).

5. The ultrasonic water meter signal sensor according to claim 4, characterized in that: The lower end of the ultrasonic transducer housing (1) is fixedly connected to a clamping platform (101), the clamping platform (101) being an annular structure, a limiting block (102) for installation limiting is fixedly connected to the clamping platform (101), and a plurality of clamping grooves (103) are provided on the outer side wall of the clamping platform (101).

6. An ultrasonic water meter, comprising a water meter body (5), with detection chambers (6) provided on both sides of the water meter body (5), characterized in that: The detection chambers (6) on both sides are respectively provided with a plurality of detection holes, each detection hole is installed with an ultrasonic water meter signal sensor as described in any one of claims 1 to 5, and are sealed and fixedly connected by a locking nut (7), and the opposing inclined surfaces (104) of the ultrasonic water meter signal sensors in the two detection holes located in the same cross section and at a diagonal position are arranged in parallel.

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