An ultrasonic water meter housing mounting structure

Abstract

This utility model provides a cover mounting structure for an ultrasonic water meter, belonging to the field of water meter technology. It solves the problem of improving the installation accuracy of the cover. In this ultrasonic water meter cover mounting structure, the ultrasonic water meter includes a base and a protective cover fixed to the top of the base. The cover is located on top of the base and covers the outside of the protective cover. The mounting structure includes at least two inner limiting blocks formed on the inner sidewall of the cover and at least two outer limiting blocks formed on the outer sidewall of the protective cover. The number of inner and outer limiting blocks corresponds. The cover can rotate circumferentially relative to the base so that each outer limiting block engages with a corresponding inner limiting block. The cover and the protective cover are locked together by screws. This ultrasonic water meter cover mounting structure improves the installation accuracy of the cover.

Description

Technical Field

[0001] This utility model belongs to the field of water meter technology and relates to a meter cover mounting structure for an ultrasonic water meter. Background Technology

[0002] Ultrasonic water meters are among the most common types of water meters today. For example, the NB-IoT ultrasonic water meter structure disclosed in Chinese Patent (Authorization Announcement No.: CN208026327U) includes a meter cover, an upper shell, a transparent potting box, a PCB circuit board, a battery pack, a sealing box, a lower shell, an ultrasonic tube section, and a cover plate. Its features include: the ultrasonic tube section is equipped with a pair of ultrasonic transducers and a pair of thermistors; the battery is placed inside the sealing box; the built-in battery and PCB circuit board are fixed within a sealed groove formed by the sealing box and the transparent potting box; the meter cover and the upper shell are connected by a rotating shaft; the upper shell and the lower shell are connected by snap-fit ​​connections; and the transparent potting box and the lower shell are fixed by snap-fit ​​connections.

[0003] As shown in the accompanying drawings and paragraph 0016 of the instruction manual, the transparent potting box is fixed to the upper housing with screws. Furthermore, paragraph 0021 of the instruction manual further explains that "the upper housing is inserted into the lower housing from the top and connected to the lower housing with a snap-fit." Reading the ultrasonic water meter requires a display screen mounted on the PCB circuit board. Since the transparent potting box itself is transparent and the PCB circuit board supporting the display screen is fixed inside the transparent potting box, a window needs to be made on the upper housing corresponding to the display screen. After the upper housing is installed, the window and the display screen are positioned in a corresponding manner (i.e., the window is positioned around the display screen). After flipping open the meter cover, the user can observe the display screen through the window.

[0004] However, the comparative document clearly states that the upper housing is inserted into the lower housing from the top and connected with the lower housing using a snap-fit ​​connection. This means that during installation, it is necessary to ensure that both the transparent potting box and the upper housing are installed without misalignment, making assembly quite difficult. Furthermore, after assembly, errors often cause the upper housing and the transparent potting box to be misaligned, resulting in a misalignment between the display screen inside the transparent potting box and the window on the upper housing. This can lead to the display screen being partially obstructed by the upper housing, affecting subsequent reading operations. Summary of the Invention

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a meter cover installation structure for an ultrasonic water meter. The technical problem to be solved by this utility model is: how to improve the installation accuracy of the meter cover.

[0006] The objective of this utility model can be achieved through the following technical solution: a meter cover mounting structure for an ultrasonic water meter, the ultrasonic water meter including a base and a protective cover fixed to the top of the base, the meter cover being located on the top of the base and covering the protective cover, characterized in that the mounting structure includes at least two inner limiting blocks formed on the inner sidewall of the meter cover and at least two outer limiting blocks formed on the outer sidewall of the protective cover, the number of inner limiting blocks and outer limiting blocks corresponding to each other, the meter cover being circumferentially rotatable relative to the base so that each outer limiting block is engaged and positioned with the corresponding inner limiting block, and the meter cover and the protective cover being locked and fixed by screws.

[0007] This application uses a base as a carrier. After assembling the circuit board and protective cover together, the protective cover is fixed to the base with screws. Ensuring a stable connection between the protective cover and the base, the watch cover is then fastened to the top of the base, so that the watch cover encloses the protective cover. Compared to existing technologies, this application differs in that at least two inner limiting blocks are formed on the inner wall of the watch cover, and at least two outer limiting blocks are formed on the outer wall of the protective cover. Specifically, the number of inner and outer limiting blocks corresponds. By rotating the watch cover circumferentially relative to the base, each outer limiting block and each inner limiting block is engaged in a one-to-one correspondence. The new design eliminates the need for connecting and fixing the dial cover and base, or the protective cover and base, in existing technologies. Instead, the base acts as a positioning medium to align the dial cover and protective cover. The inner and outer limit blocks work together to directly pre-fix the dial cover to the limit cover, preventing positional discrepancies between the window on the dial cover and the display screen inside the protective cover. Screws are then used to further tighten and secure the dial cover and protective cover, ensuring installation accuracy and maintaining their current position. This prevents partial obstruction of the display screen by the dial cover, ensuring uninterrupted reading operation.

[0008] In the aforementioned ultrasonic water meter cover installation structure, both the cover and the protective cover are rectangular covers. The outer walls at both ends of the protective cover are formed with outer limiting blocks, and the inner walls at both ends of the cover are formed with inner limiting blocks. Each inner limiting block has a slot on its side wall. The cover can rotate circumferentially along the base to engage and position each outer limiting block in its corresponding slot. After the cover is installed on the base and the protective cover is placed inside, the cover is screwed on to engage each outer limiting block in its corresponding slot on each inner limiting block. This achieves circumferential and vertical pre-positioning of the cover, ensuring that the cover and protective cover are installed on the same reference datum and preventing the display screen from being partially obstructed by the cover.

[0009] In the aforementioned ultrasonic water meter cover installation structure, each inner limiting block is a quadrangular prism. The latch is located along the length of the inner limiting block and is situated on one of the adjacent sidewalls of the inner limiting block. The sidewall facing the outer wall of the protective cover end is arc-shaped, and the outer limiting block facing the inner wall of the cover end is also arc-shaped. This avoids interference between the inner and outer limiting blocks during rotational engagement. Furthermore, during engagement, the arc surfaces of the inner and outer limiting blocks guide the assembly of the cover, ensuring convenient and labor-saving installation while maintaining installation accuracy.

[0010] In the aforementioned ultrasonic water meter cover installation structure, each of the outer limiting blocks has a vertically arranged reinforcing rib at its bottom, and the reinforcing rib abuts against the lower sidewall of the inner limiting block. The reinforcing rib improves the connection strength between the outer limiting blocks and the outer sidewall of the protective cover to a certain extent. Furthermore, the abutting fit between the reinforcing rib and the lower sidewall of the limiting block disperses the force on the inner and outer limiting blocks, preventing excessive stress concentration during insertion and thus preventing damage or breakage of the inner and outer limiting blocks.

[0011] In the aforementioned ultrasonic water meter cover mounting structure, the outer edge of the bottom wall of the bayonet has a downwardly inclined guide surface along the width direction of the cover. During the screwing process of the cover, the guide surface can guide the outward limiting block, allowing it to smoothly embed into the bayonet and avoiding interference.

[0012] In the aforementioned ultrasonic water meter housing installation structure, a connecting rib is provided between each inner limiting block and the corresponding inner sidewall of the housing end. One side of the connecting rib is fixedly connected to the inner sidewall of the housing end, and the other side is fixedly connected to the outer sidewall of the inner limiting block. This ensures the structural robustness of each inner limiting block.

[0013] In the aforementioned ultrasonic water meter housing installation structure, each of the outer walls of the housing has a connecting protrusion 1, and each of the outer walls of the protective cover has a connecting protrusion 2. The connecting protrusion 1 has a stepped hole extending horizontally into the inner wall of the housing, and the connecting protrusion 2 has a threaded hole on its outer wall. When the housing rotates to engage and position each outer limiting block in its corresponding slot, the stepped hole and the threaded hole are aligned. This design allows the connecting protrusion 1 and connecting protrusion 2 to be screwed together and locked in place after the protective cover is pre-positioned, ensuring the housing is firmly positioned on the protective cover while maintaining its current positioning accuracy.

[0014] Compared with existing technologies, the installation structure of this ultrasonic water meter has the following advantages: By screwing the meter cover along the circumference of the base, each outer limit block and the corresponding inner limit block are engaged. Under the premise of pre-positioning of the meter cover and the protective cover in the circumferential and vertical directions, the meter cover is screwed and locked onto the protective cover with screws. This ensures that the meter cover and the protective cover are always at the same installation reference, ensuring the installation accuracy of the meter cover and preventing misalignment of the window on the meter cover and the display screen inside the protective cover due to deviations in their installation positions. This also prevents the meter cover from obstructing the display screen and affecting the reading operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the mounting structure of the ultrasonic water meter's cover.

[0016] Figure 2 This is a front view of the mounting structure of the ultrasonic water meter's cover.

[0017] Figure 3 yes Figure 2 A sectional view taken along the AA direction and a magnified view of a portion thereof.

[0018] Figure 4 yes Figure 2 A sectional view taken along the BB direction and a magnified view of a portion thereof.

[0019] Figure 5 This is a front view of the ultrasonic water meter's cover installation structure when the cover is not properly installed.

[0020] Figure 6 yes Figure 5 A sectional view taken along the CC direction and its enlarged portion.

[0021] Figure 7 This is a schematic diagram of the watch cover.

[0022] Figure 8 It is a structural schematic diagram of the base and protective cover, as well as a partial enlarged view.

[0023] In the picture,

[0024] 1. Base;

[0025] 2. Protective cover; 21. Outer limit block; 211. Reinforcing rib; 22. Connecting protrusion two; 221. Threaded hole;

[0026] 3. Cover; 31. Inner limit block; 311. Bayonet; 3111. Guide surface; 32. Connecting stiffener; 33. Connecting protrusion one; 331. Step hole. Detailed Implementation

[0027] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0028] like Figure 1 , Figure 2 , Figure 7 as well as Figure 8 As shown, in the installation structure of the ultrasonic water meter cover, the ultrasonic water meter includes a base 1 and a protective cover 2 fixed to the top of the base 1. The cover 3 is set on the top of the base 1 and covers the cover 3 inside. The cover 3 can rotate circumferentially relative to the base 1 and be circumferentially positioned with the protective cover 2. Specifically, both the protective cover 2 and the cover 3 are rectangular covers. Two protrusions are formed on the outer walls of both ends of the protective cover 2. Connecting protrusions 33 and 22 are formed on both side walls of the protective cover 2. Each protrusion and each connecting protrusion 33 and 22 has a connecting hole that passes through both ends in the vertical direction. The protective cover 2 is screwed to the base 1 (the fixed hole is preset on the base 1) by screws passing through the connecting holes, so that the protective cover 2 is fixed to the top of the base 1.

[0029] like Figure 8 As shown, outer limiting blocks 21 are formed on both side walls of the protective cover 2, and the outer limiting blocks 21 are located between the two protrusions. Each outer limiting block 21 is L-shaped, and after the watch cover 3 is installed in place, the outer wall on one side facing the inner wall of the end of the watch cover 3 is bent into an arc shape along the length of the protective cover 2, as shown. Figure 7 As shown, quadrangular prism-shaped inner limiting blocks 31 are formed on the inner walls of both ends of the watch cover 3. Each inner limiting block 31 and the corresponding inner side wall of the end of the watch cover 3 are connected as one unit by a connecting rib plate 32. The inner limiting block 31 is provided with a latch 311. Specifically, the latch 311 is provided on the adjacent two side walls of the inner limiting block 31, and its upper end extends to the top inner wall of the watch cover 3. A guide surface 3111 inclined downward along the width direction of the protective cover 2 is formed at the outer edge of the bottom wall of the latch 311. The side wall of the latch 311 facing the outer wall of the end of the protective cover 2 is curved in an arc shape along the width direction of the watch cover 3, and the curvature of this side wall of the latch 311 is the same as the curvature of the corresponding outer wall of the outer limiting block 21 that is curved in an arc. A plate-shaped reinforcing rib plate 211 is formed vertically at the bottom of each outer limiting block 21. Connecting protrusions 33 are formed on the outer walls of both sides of the watch cover 3. Each connecting protrusion has a stepped hole 331 that extends through to the inner wall of the watch cover 3 in the horizontal direction. Threaded holes 221 are formed on each connecting protrusion 33 in the horizontal direction.

[0030] Combination Figure 3-6During actual installation, the user fastens the watch cover 3 onto the base 1, with the watch cover 3 tilted at a 10° angle relative to the protective cover 2. In this state, two diagonal outer walls of the protective cover 2 abut against the inner wall of the watch cover 3, while the two inner limit blocks 31 abut against the outer walls at both ends of the protective cover 2. This four-point abutment method limits the watch cover 3 counterclockwise. At this point, the user can rotate the watch cover 3 clockwise, causing the two outer limit blocks 21 to engage with the slots 311 on the side walls of the corresponding inner limit blocks 31. The outer limit blocks 21 abut against the side walls and bottom wall of the slots 311, and the watch cover 3 is then engaged. By abutting against the lower side wall of the connecting rib plate 32 and the inner limiting block 31, the watch cover 3 is positioned in the circumferential and vertical directions. At this time, the positions of the two connecting protrusions 33-1 and the two connecting protrusions 33-22 correspond one-to-one, so that the stepped hole 331 opened on the connecting protrusion 33-1 and the threaded hole 221 opened on the connecting protrusion 33-22 are directly opposite each other. The screw is passed through the stepped hole 331 and screwed into the threaded hole 221, so that the watch cover 3 is locked and positioned on the protective cover 2, ensuring that the window opened on the watch cover 3 surrounds the display screen installed inside the protective cover 2, so as to avoid the display screen being blocked and causing inconvenience in reading.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0032] Although this document frequently uses terms such as base 1, protective cover 2, outer limiting block 21, reinforcing rib 211, connecting protrusion 22, threaded hole 221, cover 3, inner limiting block 31, bayonet 311, guide surface 3111, connecting rib 32, connecting protrusion 33, and stepped hole 331, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A cover mounting structure for an ultrasonic water meter, the ultrasonic water meter comprising a base (1) and a protective cover (2) fixed to the top of the base (1), the cover (3) being located on top of the base (1) and covering the protective cover (2), characterized in that, The mounting structure includes at least two inner limiting blocks (31) formed on the inner sidewall of the watch cover (3) and at least two outer limiting blocks (21) formed on the outer sidewall of the protective cover (2). The number of inner limiting blocks (31) and outer limiting blocks (21) corresponds. The watch cover (3) can rotate circumferentially relative to the base (1) so that each outer limiting block (21) is engaged and positioned with the corresponding inner limiting block (31). The watch cover (3) and the protective cover (2) are locked and fixed by screws.

2. The meter cover mounting structure of the ultrasonic water meter according to claim 1, characterized in that, Both the watch cover (3) and the protective cover (2) are rectangular covers. The outer limit blocks (21) are formed on the outer walls of both ends of the protective cover (2). The inner limit blocks (31) are formed on the inner walls of both ends of the watch cover (3). Each inner limit block (31) has a slot (311) on its side wall. The watch cover (3) can rotate around the circumference of the base (1) so that each outer limit block (21) is engaged and positioned in the corresponding slot (311).

3. The meter cover mounting structure of the ultrasonic water meter according to claim 2, characterized in that, Each of the inner limiting blocks (31) is in the shape of a quadrangular prism. The slot (311) is opened along the length direction of the inner limiting block (31) and the slot (311) is opened on the adjacent two side walls of the inner limiting block (31). The slot (311) is arc-shaped on one side wall facing the outer wall of the end of the protective cover (2), and the outer limiting block (21) is arc-shaped on one side wall facing the inner wall of the end of the cover (3).

4. The meter cover mounting structure of the ultrasonic water meter according to claim 3, characterized in that, Each of the outer limiting blocks (21) has a vertically arranged reinforcing rib (211) at its bottom, and the reinforcing rib (211) abuts against the lower sidewall of the inner limiting block (31).

5. The meter cover mounting structure of the ultrasonic water meter according to claim 2, 3, or 4, characterized in that, The bottom outer edge of the bayonet (311) has a downwardly inclined guide surface (3111) along the width direction of the cover (3).

6. The meter cover mounting structure of the ultrasonic water meter according to claim 5, characterized in that, Each inner limiting block (31) and the inner wall of the corresponding end of the cover (3) have a connecting rib (32). One side of the connecting rib (32) is fixed to the inner wall of the end of the cover (3), and the other side is fixed to the outer wall of the inner limiting block (31).

7. The meter cover mounting structure of the ultrasonic water meter according to claim 6, characterized in that, The outer walls of both sides of the watch cover (3) have connecting protrusion 1 (33), and the outer walls of both sides of the protective cover (2) have connecting protrusion 2 (22). The connecting protrusion 1 (33) has a stepped hole (331) that penetrates to the inner wall of the watch cover (3) along the horizontal direction. The outer wall of the connecting protrusion 2 (22) has a threaded hole (221). When the watch cover (3) rotates so that each of the outer limit blocks (21) is engaged and positioned in the corresponding bayonet (311), each of the stepped holes (331) and each of the threaded holes (221) are aligned one by one.

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