Ultrasonic gas meter with cross-bridge assembly structure

Abstract

The utility model relates to an ultrasonic gas meter with cross bridge type assembly structure, its characterized in that: the valve is equipped with first support extension, the metering module is equipped with second support extension, the lower casing inner wall is equipped with at least a pair of limit steps, the valve is across on the corresponding pair of limit steps through first support extension, the metering module is across on the corresponding another pair of limit steps through second support extension, the upper cover inside is equipped with the compression protruding, makes the valve and metering module are clamped between compression protruding and limit step.

Description

Technical Field

[0001] This utility model relates to an ultrasonic gas meter with a bridge-type assembly structure. Background Technology

[0002] Ultrasonic gas meters, with their advantages of non-contact measurement, no moving parts, low pressure loss, extremely high metering accuracy, and compatibility with more intelligent applications, have become a hot development area in the gas metering field in recent years. However, existing ultrasonic gas meters still suffer from problems in structural design, such as complex assembly processes, poor installation tolerance, and a high risk of loosening. Furthermore, poor compatibility between different models and high development costs limit their further promotion and application. Specifically, existing valves and metering modules are typically secured with screws, retaining rings, or mounted on independent brackets within the housing. These fastening methods are cumbersome, involve numerous parts, and rely solely on screws, leaving the valve and metering module suspended. This makes them prone to movement during logistics or long-term operation, leading to loosening or seal failure. Therefore, designing a simple yet reliable assembly structure is essential. Utility Model Content

[0003] In view of the problems existing in the prior art, the purpose of this utility model is to provide a technical solution for an ultrasonic gas meter with a bridge-type assembly structure.

[0004] An ultrasonic gas meter with a bridge-type assembly structure includes an ultrasonic base meter and a controller box. The ultrasonic base meter includes an upper cover and a lower housing, which are fastened together to form a sealed internal space. Its characteristic is that: The ultrasonic base meter is equipped with a valve and a metering module. The valve has a first support extension and the metering module has a second support extension. The inner wall of the lower housing is provided with at least one pair of limiting steps, and the limiting steps are arranged in pairs and symmetrically. The valve spans across a pair of corresponding limiting steps via the first support extension, and the metering module spans across another pair of corresponding limiting steps via the second support extension; The inner side of the upper cover is provided with a pressing protrusion. After the upper cover and the lower shell are closed, the pressing protrusion presses against the upper surface of the first support extension and the second support extension, so that the valve and the metering module are clamped between the pressing protrusion and the limiting step.

[0005] The ultrasonic gas meter with a bridge-type assembly structure is characterized in that: the valve is further provided with a valve port support rib, which is supported on the inner wall of the lower housing to prevent the valve from being misaligned during installation.

[0006] An ultrasonic gas meter with a bridge-type assembly structure is characterized in that: the inner side of the upper cover is provided with anti-fooling ribs, and the second support extension of the metering module is provided with anti-fooling protrusions; When the top cover is installed in the correct direction, the anti-misalignment rib and the anti-misalignment protrusion will not interfere with each other; When the top cover is installed in the wrong direction, the anti-misalignment rib abuts against the anti-misalignment protrusion, preventing installation.

[0007] An ultrasonic gas meter with a bridge-type assembly structure is characterized in that the installation positions of the valve and the metering module can be interchanged according to the gas inlet direction. When the ultrasonic gas meter has a left-side air inlet, the valve is installed on the side of the air inlet, and the metering module is installed on the side of the air outlet. When the ultrasonic gas meter has a right-inlet gas flow, the valve and the metering module are installed in interchangeable positions.

[0008] The ultrasonic gas meter with a bridge-type assembly structure is characterized in that: the inner wall of the lower housing is further provided with a side bottom limiting rib, and the bottom of the flow channel of the metering module abuts against the side bottom limiting rib to restrict the displacement of the metering module in the horizontal direction.

[0009] The ultrasonic gas meter with a bridge-type assembly structure is characterized in that: the controller box is fixed to the lower housing by screws, and the contact surface between the controller box and the lower housing is provided with a sealing gasket to form a sealing structure.

[0010] The ultrasonic gas meter with a bridge-type assembly structure is characterized in that: the controller box is provided with a battery compartment and a battery compartment cover, the battery compartment is provided with limiting ribs around it, and the outer ring of the limiting ribs is provided with a battery compartment sealing gasket; the inner side of the battery compartment cover is provided with a sealing rib, and when closed, the sealing rib and the battery compartment sealing gasket are fitted together to form a seal.

[0011] The ultrasonic gas meter with a bridge-type assembly structure is characterized in that: the air inlet and outlet of the upper cover adopt a replaceable threaded interface structure to adapt to different types of pipe connections.

[0012] Technical effects of this utility model: 1. Improved assembly efficiency: The bridge-type installation structure eliminates the need for screws to fix the valve and metering module, greatly simplifying the assembly process. Compared with the traditional structure, it can significantly shorten the assembly time, improve production efficiency, and reduce production costs. 2. Improved installation accuracy and stability: It avoids the installation errors and loosening risks that may occur with traditional screw fixing methods. The precise positioning of the limit step ensures that the valve and module are installed in the correct position, thus improving the stability of the product during long-term use. 3. Reduce development costs and improve product compatibility: The G4 and G6 models share the same lower shell. Since the G4 and G6 are used in different environments, the thread for connecting the G4 to the pipe is M30×2, while that for the G6 is G1¼. Switching can be achieved simply by replacing the cast aluminum top cover and connecting pipe. There is no need to develop a complete set of shell structures for different models, which significantly reduces development costs and improves product compatibility, making it easier to flexibly adjust production according to market demand. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a bottom view of the top cover of this utility model. Figure 3 This is a schematic diagram of the lower shell structure of this utility model; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 This is a schematic diagram of the crossbridge installation inside the lower housing of this utility model; Figure 6 This is a schematic diagram of the valve structure of this utility model; In the diagram, 1-top cover; 11-pressing protrusion; 12-foolproof rib; 2-lower shell; 21-positioning hole; 23-side wall limiting rib groove; 231-limiting step; 24-side bottom limiting rib; 3-controller box; 4-valve; 41-valve port; 42-valve seal; 411-first support extension; 412-valve port support rib; 5-metering module; 51-plastic adapter; 511-second support extension; 512-foolproof protrusion. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings: like Figure 1 As shown, the ultrasonic gas meter adopts a split structure, consisting of an aluminum ultrasonic base meter and a controller box 3 mounted on the base meter. The ultrasonic base meter includes an upper cover 1 and a lower housing 2. The upper cover 1 includes an air inlet, an air outlet, a pressing protrusion 11, and a foolproof rib 12. The lower housing 2 has a first sealing groove on its top flange surface, and a sealing gasket is provided in the first sealing groove. The upper cover 1 and the lower housing 2 are fastened together with screws to press and seal the sealing gasket, forming a sealed internal space.

[0015] The lower housing 2 has a second sealing groove along its circumference on the contact surface facing the controller, and a sealing gasket is also provided in the second sealing groove.

[0016] The controller box 3 is made of flame-retardant engineering plastic and metal through a two-stage injection molding process and is fixed to the lower housing 2 with screws. The controller box 3 contains a main control board and a battery compartment for housing the battery. The controller box 3 is equipped with control buttons that connect to the buttons on the main control board for easy user operation.

[0017] The controller box 3 is also equipped with a battery compartment cover for opening and closing the battery compartment. Limiting ribs are provided around the battery compartment, and a battery compartment sealing gasket is provided on the outer ring of the limiting ribs. A sealing rib is provided on the inner side of the battery compartment cover. When the battery compartment cover is closed, the limiting ribs play a guiding role, and the sealing ribs and the battery compartment sealing gasket fit together to form a sealing structure to prevent dust and moisture from entering.

[0018] The control box 3 is also equipped with functional interfaces such as an external antenna interface, a leakage alarm interface, and an optional interface for an alkaline lithium battery compartment.

[0019] like Figures 1 to 6 As shown, the inner wall of the lower housing 2 is provided with side wall limiting ribs 23. Specifically, the four side wall limiting ribs 23 are arranged in pairs and axially symmetrically distributed on the front and rear inner walls of the lower housing 2. The side wall limiting ribs 23 on the same inner wall are symmetrical to each other, and the center line connecting the opposite pairs of side wall limiting ribs 23 on the front and rear inner walls passes through the center of the corresponding air inlet and outlet in the axial projection direction of the lower housing. Furthermore, each side wall limiting rib 23 has a step at its top, and the steps on each pair of side wall limiting ribs 23 constitute a limiting step 231.

[0020] The lower housing 2 houses a valve 4 and a metering module 5. The valve 4 includes a valve port 41 and a valve seal 42. The outer edge of the valve port 41 extends radially outward to form a first support extension 411, which has a flat pole structure and spans across the limiting step 231 corresponding to the air inlet, forming a bridge-type assembly structure. A plastic adapter 51 is installed at the air outlet of the metering module 5. The plastic adapter 51 also has second support extensions 511 extending outward on both sides, forming a flat pole structure. During installation, the metering module 5 spans across the limiting step 231 corresponding to the air outlet side of the lower housing 2 via the second support extensions 511. During installation, simply place the valve 4 and the metering module 5 at the limiting step 231, and then tighten the upper cover 1 to the lower housing 2. In addition, the pressing protrusions 11 provided on the inner side of the top cover 1 are respectively aligned with the four limiting steps 231. After the cover is closed, the bottom surface of the pressing protrusions 11 presses against the upper surface of the first support extension 411 and the second support extension 511. Therefore, the valve 4 and the metering module 5 are clamped between the pressing protrusions 11 and the limiting steps 231, achieving a stable lock. There is no need to use screws for fixing, which greatly simplifies the assembly process, improves production efficiency, and avoids the installation errors and loosening risks that may be caused by traditional screw fixing.

[0021] To further improve stability, valve 4 is also provided with valve port support rib 412. Valve port support rib 412 is located on the left side of valve port 41 and supported on the inner wall of lower housing 2 to prevent the center of gravity of valve 4 from shifting during installation, which would affect the assembly quality.

[0022] The lower housing 2 is also integrally injection molded with side bottom limiting ribs 24, and the two side bottom limiting ribs 24 are symmetrically distributed on the left and right inner walls of the lower housing 2. When the metering module 5 spans across the limiting step 231, the bottom of the flow channel of the metering module 5 just abuts against the side bottom limiting ribs 24, preventing the metering module 5 from swaying left and right in the horizontal direction.

[0023] Furthermore, the top outer ring of valve port 41 and the top outer ring of plastic adapter 51 are both provided with sealing gaskets to enhance the sealing performance of the connection between valve 4, metering module 5 and upper cover 1.

[0024] In this embodiment, the installation positions of valve 5 and metering module 5 relative to the lower housing 2 of the gas meter can be interchanged according to the gas inlet direction of the gas meter. Specifically, when the gas meter is a left-inlet meter, valve 4 is installed on the inlet side and metering module 5 is installed on the outlet side; when the gas meter is a right-inlet meter, valve 4 and metering module 5 are installed in interchanged positions.

[0025] Since valve 4 and metering module 5 are interchangeable, there is a possibility that the air inlet and outlet of the upper cover 1 may be connected to valve 5 and metering module 5 by mistake during the installation of the upper cover 1. To prevent reverse airflow, this embodiment also includes a foolproof mating structure.

[0026] Inside the upper cover 1, two anti-mistake ribs 12 extend radially to both sides of the air inlet. Anti-mistake protrusions 512 are provided on the top of the second support extension 511 of the metering module 5. When the air inlet of the upper cover 1 is correctly connected to the valve 4, the space below the anti-mistake ribs 12, i.e., the top of the first support extension 411, does not have an anti-mistake structure, and the two do not interfere with each other, so the upper cover 1 can be installed smoothly. When the upper cover 1 is connected in reverse, the anti-mistake ribs 12 and the anti-mistake protrusions 512 abut against each other, blocking the installation.

[0027] In this embodiment, valve 4 is an L-shaped concealed valve-sealed motor valve. As an equivalent alternative, valve 4 can also be a vertical screw motor valve commonly used in the prior art.

[0028] The lower housing 2 also includes a locking hole 21, which is used to realize the electrical connection between the wires of the internal metering module 5 and valve 4 of the ultrasonic base meter and the external controller box 3, that is, to fix the wire path or connect the auxiliary connector.

[0029] During assembly, according to the design requirements of the gas meter's air intake direction, the first support extension 411 is placed across the corresponding limiting step 231 on the side of the air inlet, allowing the valve 4 to span across the limiting step 231, and the left support rib 214 is stably supported on the left inner wall of the lower housing 2. Simultaneously, the second support extension 511 is placed across the corresponding limiting step 231 on the side of the air outlet, allowing the metering module 5 to span across the limiting step. Next, the valve 4 and metering module 5 are electrically connected to the external controller box 3, for example, their wires are electrically connected to the main control board of the controller box 3 through the locking hole 21. Then, the main control board and power supply are installed inside the controller box 3, and the power supply is connected. A sealing gasket is installed on the lower housing 2, and the controller box 3 is pressed tightly against the lower housing 2. The screw fixing holes on the front cover of the controller box 3 correspond to the machined studs on the lower housing 2. The inner ring plastic sealing rib of the controller box 3 presses against the sealing gasket, and screws are used to fasten the controller box 3 to the lower housing 2, forming a seal. Finally, install the sealing gasket on the lower flange face, cover the base plate with the upper cover 1, and ensure that the valve port 41 and the plastic adapter 51 are accurately fitted into the inner wall of the connector cavity of the upper cover 1. The connection is sealed by the sealing gasket, and the upper cover is firmly fixed with multi-point anti-tamper Torx screws. When producing the G4 model, use a cast aluminum upper cover with M30×2 threads and the corresponding connecting pipe connected to the module; when producing the G6 model, replace it with a cast aluminum upper cover with G1¼ threads and the corresponding connecting pipe.

[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An ultrasonic gas meter with a bridge-type assembly structure, comprising an ultrasonic base meter and a controller box (3), wherein the ultrasonic base meter comprises an upper cover (1) and a lower housing (2), the upper cover (1) and the lower housing (2) being fastened together to form a sealed internal space, characterized in that: The ultrasonic base meter is provided with a valve (4) and a metering module (5). The valve (4) is provided with a first support extension (411), and the metering module (5) is provided with a second support extension (511). The inner wall of the lower housing (2) is provided with at least one pair of limiting steps (231), and the limiting steps (231) are arranged in pairs and symmetrically. The valve (4) spans across a pair of corresponding limiting steps (231) via the first support extension (411), and the metering module (5) spans across another pair of corresponding limiting steps (231) via the second support extension (511). The upper cover (1) has a pressing protrusion (11) on its inner side. After the upper cover and the lower shell are closed, the pressing protrusion (11) presses against the upper surface of the first support extension (411) and the second support extension (511), so that the valve (4) and the metering module (5) are clamped between the pressing protrusion (11) and the limiting step (231).

2. An ultrasonic gas meter with a bridge-type assembly structure according to claim 1, characterized in that: The valve (4) is also provided with a valve port support rib (412), which is supported on the inner wall of the lower housing (2) to prevent the valve (4) from being installed off-center.

3. An ultrasonic gas meter with a bridge-type assembly structure according to claim 1, characterized in that: The inner side of the upper cover (1) is provided with anti-mistake ribs (12), and the second support extension (511) of the metering module (5) is provided with anti-mistake protrusions (512). When the top cover (1) is installed in the correct direction, the anti-misalignment rib (12) and the anti-misalignment protrusion (512) will not interfere with each other when misaligned; When the top cover (1) is installed in the wrong direction, the anti-misalignment rib (12) abuts against the anti-misalignment protrusion (512), preventing installation.

4. An ultrasonic gas meter with a bridge-type assembly structure according to claim 1, characterized in that: The installation positions of the valve (4) and the metering module (5) can be interchanged according to the air intake direction; When the ultrasonic gas meter is in the left air intake position, the valve (4) is installed on the air intake side and the metering module (5) is installed on the air outlet side. When the ultrasonic gas meter is in the right-inlet mode, the valve (4) and the metering module (5) are installed in interchangeable positions.

5. An ultrasonic gas meter with a bridge-type assembly structure according to claim 1, characterized in that: The inner wall of the lower housing (2) is also provided with a side bottom limiting rib (24), and the bottom of the flow channel of the metering module (5) abuts against the side bottom limiting rib (24) to limit the displacement of the metering module (5) in the horizontal direction.

6. An ultrasonic gas meter with a bridge-type assembly structure according to claim 1, characterized in that: The controller box (3) is fixed to the lower housing (2) by screws. The contact surface between the controller box (3) and the lower housing (2) is provided with a sealing gasket to form a sealing structure.

7. An ultrasonic gas meter with a bridge-type assembly structure according to claim 1, characterized in that: The controller box (3) is provided with a battery compartment and a battery compartment cover. The battery compartment is surrounded by a limiting rib, and the outer ring of the limiting rib is provided with a battery compartment sealing gasket. The inner side of the battery compartment cover is provided with a sealing rib. When closed, the sealing rib and the battery compartment sealing gasket fit together to form a seal.

8. An ultrasonic gas meter with a bridge-type assembly structure according to claim 1, characterized in that: The air inlet and outlet of the upper cover (1) adopt a replaceable threaded interface structure to adapt to different types of pipe connections.

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