Gas meter

Abstract

The utility model belongs to the technical field of measuring instrument, disclose a kind of gas meter, including meter shell and metering component, meter shell includes first shell, second shell and baffle, first shell is arranged as the slot structure of one end open, and second shell blocks the open of first shell to form containing cavity;Baffle is integrally formed in first shell and will containing cavity be divided into air inlet cavity and air outlet cavity, and mounting hole is formed on baffle;Metering component is inserted in baffle and is connected with baffle.The above-mentioned gas meter is simple to assemble.

Description

Technical Field

[0001] This utility model relates to the field of measuring instrument technology, and in particular to a gas meter. Background Technology

[0002] Ultrasonic gas meters are a new type of gas meter that uses ultrasonic waves to measure gaseous fluids. Due to their small size, simple structure, accurate measurement, wide range, and low power consumption, they are widely used in the market. In practical use, to protect the metering channel of the ultrasonic gas meter, the metering channel is usually installed inside the meter casing.

[0003] Because the received ultrasonic signal is affected by fluctuations in gas flow rate, large fluctuations in gas flow rate can reduce the measurement accuracy of ultrasonic gas meters. Therefore, if... Figure 5 In the aforementioned related technology, the internal space of the watch case is divided into an air inlet chamber 14 and an air outlet chamber 15. The air inlet chamber 14 can buffer the pressure of the gas entering the watch case before allowing the gas to enter the metering channel 22 for measurement, which has a good suppressive effect on the pressure fluctuation of the upstream gas. The air outlet chamber 15 can buffer the pressure fluctuation generated by the load, that is, it has a good suppressive effect on the pressure fluctuation of the downstream gas, thus avoiding the impact of unstable load on the accuracy of the measurement results.

[0004] The air inlet chamber 14 and the air outlet chamber 15 are separated by a partition 11 set inside the meter housing. The metering channel 22 is usually fixed to the partition 11 with bolts. However, the setting of the partition 11 results in a small internal space of the meter housing, and it is difficult to assemble the metering channel 22 onto the partition 11. If the assembly requirements of the metering channel 22 are met by increasing the volume of the meter housing, it does not conform to the design trend of miniaturization of civilian gas meters. Utility Model Content

[0005] The purpose of this utility model is to provide a gas meter that solves the problem of difficult assembly of the metering channel caused by the small internal space of the meter casing.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A gas meter, a meter housing, and a metering component. The meter housing includes a first housing, a second housing, and a partition. The first housing is configured as a groove-shaped structure with one end open. The second housing seals the opening of the first housing to form a receiving cavity. The partition is disposed inside the first housing and divides the receiving cavity into an inlet cavity and an outlet cavity. The partition has a mounting hole. The metering component passes through the mounting hole and is engaged with the partition.

[0008] Optionally, the metering component includes a metering channel and a drainage tube. The drainage tube is equipped with an elastic buckle. The metering channel is connected to the drainage tube. The drainage tube passes through the mounting hole and is secured to the partition plate by the elastic buckle. The outer wall of the drainage tube is axially spaced with elastic buckles and limiting steps, which respectively abut against opposite sides of the partition plate.

[0009] Optionally, the side wall of the drainage tube is provided with a clearance hole corresponding to each of the elastic buckles, and the elastic buckle is positioned directly opposite the clearance hole.

[0010] Optionally, the elastic buckle is disposed in the air outlet chamber, and the limiting step is disposed in the air inlet chamber.

[0011] Optionally, the gas meter further includes a sealing ring fitted on the drain pipe, the sealing ring being sandwiched between the limiting step and the partition.

[0012] Optionally, a plurality of the elastic clips are spaced apart circumferentially along the drainage tube.

[0013] Optionally, the drainage tube includes a metal frame and a plastic layer covering the metal frame.

[0014] Optionally, the outer wall of the drainage tube is provided with a foolproof structure, and the wall of the mounting hole is provided with a foolproof mating structure.

[0015] Optionally, both the foolproof structure and the foolproof mating structure are configured as planes.

[0016] The beneficial effects of this utility model are as follows: The metering component in this utility model is inserted into the mounting hole and snapped into the partition, which enables the metering component and the partition to be quickly connected in the limited space of the accommodating cavity. Compared with the need to use fasteners to fix the metering component to the partition, no tools are required, the required installation space is small, and the installation difficulty is low. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the internal structure of the gas meter in an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the drainage tube assembled on the first housing in an embodiment of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the first housing in an embodiment of this utility model;

[0020] Figure 4 This is a schematic diagram of the drainage tube in an embodiment of this utility model;

[0021] Figure 5 This is a schematic diagram of the metering channel assembled on the drainage tube in related technologies.

[0022] In the picture:

[0023] 1. First housing; 11. Partition plate; 111. Mounting hole; 112. Foolproof fitting structure; 12. Air inlet; 13. Air outlet; 14. Air inlet chamber; 15. Air outlet chamber; 2. Metering component; 21. Drainage tube; 211. Elastic buckle; 212. Limiting step; 213. Clearance hole; 214. Square interface; 215. Foolproof structure; 22. Metering channel. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0028] refer to Figures 1-4 As shown, an embodiment of this utility model provides a gas meter, including a meter housing and a metering component 2. The meter housing can be made of aluminum or steel to give the gas meter high structural strength. The meter housing includes a first housing 1 and a second housing. The first housing 1 is configured as a groove-shaped structure with one open end. The second housing seals the open end of the first housing 1 to form a cavity for accommodating the metering component 2. The first housing 1 is provided with a partition 11 integrally formed with the first housing 1. The partition 11 divides the cavity into an inlet cavity 14 and an outlet cavity 15. An inlet 12 and an outlet 13 are provided on the first housing 1 or the second housing. The inlet 12 connects the inlet cavity 14 to the outside, and the outlet 13 connects the outlet cavity 15 to the outside. The partition 11 has a mounting hole 111 for inserting the metering component 2. The metering component 2 is inserted into the mounting hole 111 and engaged with the partition 11.

[0029] Understandably, in order to ensure that the gas can only be transferred from the intake chamber 14 to the exhaust chamber 15 through the metering component 2, the baffle 11 and the first housing 1 should maintain a sealed connection, that is, the intake chamber 14 should remain sealed. Therefore, the integral molding of the baffle 11 and the first housing 1 can give the intake chamber 14 good sealing performance, and it is simple to process and has a reliable structure. When the metering component 2 is assembled into the baffle 11 in the accommodating cavity, the metering component 2 directly engages with the baffle 11 during the process of inserting it into the mounting hole 111. This allows for a quick connection between the metering component 2 and the baffle 11 in the limited space of the accommodating cavity. Compared with the need to use fasteners to fix the metering component 2 to the baffle 11, no tools are required, the installation space required is small, and the installation difficulty is low.

[0030] In this embodiment, the metering component 2 includes a metering channel 22 and a drainage tube 21. The metering channel 22 adopts an ultrasonic metering unit in the prior art, which will not be described in detail here. The drainage tube 21 is provided with an elastic buckle 211. The metering channel 22 is connected to the drainage tube 21 and is fixed to the partition plate 11 through the drainage tube 21 passing through the mounting hole 111. The metering channel 22 is in communication with the drainage tube 21. In this embodiment, the drainage tube 21 is snapped onto the partition plate 11. The drainage tube 21 is a commonly used consumable part in the prior art, which is low in cost. Compared with setting the elastic buckle 211 on the metering channel 22 and making the metering channel 22 directly snap onto the partition plate 11, the cost of subsequent disassembly and damage is reduced.

[0031] In this embodiment, as Figure 4As shown, the outer wall of the drainage tube 21 is provided with elastic buckles 211 and limiting steps 212 at intervals along the axial direction. After the drainage tube 21 passes through the mounting hole 111 in the first direction, the elastic buckles 211 and the limiting steps 212 abut against the opposite sides of the partition 11. The elastic buckles 211 restrict the movement of the drainage tube 21 towards the limiting steps 212, while the limiting steps 212 restrict the movement of the drainage tube 21 in the elastic direction, thereby achieving rapid fixation of the drainage tube 21.

[0032] Specifically, the side wall of the drainage tube 21 has a clearance hole 213 corresponding to the elastic buckle 211. The elastic buckle 211 is positioned directly opposite the clearance hole 213, which provides clearance space for the elastic buckle 211. When the drainage tube 21 passes through the mounting hole 111, the elastic buckle 211 is squeezed into the clearance hole 213 by the hole wall of the mounting hole 111. After successfully passing through the mounting hole 111 and entering the air outlet chamber 15, the elastic buckle 211 moves away from the axis of the drainage tube 21 under its own elastic force and abuts against the partition 11, thereby fixing the drainage tube 21 to the partition 11. At this time, the elastic buckle 211 is set in the air outlet chamber 15, and the limiting step 212 is set in the air inlet chamber 14. That is, the drainage tube 21 passes through the air outlet chamber 15 from the direction of the air inlet chamber 14, so as to avoid the setting of the clearance hole 213 from affecting the detection accuracy. To further reduce the assembly difficulty of the metering component 2, the length of the air inlet chamber 14 is greater than the length of the air outlet chamber 15 along the axial direction of the mounting hole 111.

[0033] To prevent gas from entering the outlet chamber 15 through the gap between the inlet pipe 21 and the partition 11 without passing through the metering channel 22, the gas meter also includes a sealing ring (not shown in the figure) fitted onto the inlet pipe 21. The sealing ring is sandwiched between the limiting step 212 and the partition 11, and the gap between the inlet pipe 21 and the mounting hole 111 is sealed by compressing the sealing ring, so that gas can only enter the outlet chamber 15 through the metering channel 22 and the inlet pipe 21. The sealing ring can be a rubber sealing ring, a silicone sealing ring, etc.

[0034] Specifically, to improve the stability of the drainage tube 21 assembled on the partition 11, multiple elastic clips 211 are arranged at intervals along the circumference of the drainage tube 21, for example, three or four elastic clips 211 are arranged at intervals on the drainage tube 21. More specifically, in order to form uniform compression of the sealing ring, multiple elastic clips 211 are arranged in a ring array on the drainage tube 21.

[0035] Existing drain pipes 21 are generally made of aluminum to provide higher structural strength and thus extend the service life of the gas meter. However, aluminum drain pipes are expensive to manufacture. In this embodiment, the drain pipe 21 includes a metal frame and a plastic layer covering the metal frame. The metal frame provides higher structural strength to the drain pipe 21. For example, the metal frame is made of aluminum. Compared to being made entirely of aluminum, the plastic layer reduces the manufacturing cost of the drain pipe 21. The elastic buckle 211 and the limiting step 212 are both integrally injection molded into the plastic layer.

[0036] Continue to refer to Figure 4 As shown, one end of the drainage tube 21 that connects to the metering channel 22 is provided with a square interface 214 for connecting the metering channel 22. In order to ensure the consistency of the installation direction of the metering channel 22, a foolproof structure 215 is provided on the outer wall of the drainage tube 21, and a foolproof mating structure 112 is provided on the hole wall of the mounting hole 111, which plays a foolproof role during the assembly process.

[0037] In this embodiment, both the foolproof structure 215 and the foolproof mating structure 112 are set as planes. When the drainage tube 21 is assembled, the foolproof structure 215 and the foolproof mating structure 112 fit together.

[0038] In other embodiments, the foolproof structure 215 may be a bump, and the foolproof mating structure 112 may be a slot for the bump to be inserted.

[0039] In other embodiments, the partition 11 has a slot for communicating with the mounting hole 111, and the drainage tube 21 is provided with an elastic buckle 211, which can be inserted into the slot to achieve the connection between the drainage tube 21 and the partition 11.

[0040] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A gas meter characterised in that, include: The watch case includes a first housing (1), a second housing, and a partition (11). The first housing (1) is configured as a groove-shaped structure with one end open. The second housing seals the opening of the first housing (1) to form a receiving cavity. The partition (11) is disposed inside the first housing (1) and divides the receiving cavity into an air inlet cavity (14) and an air outlet cavity (15). The partition (11) is provided with mounting holes (111). Metering component (2), which passes through the mounting hole (111) and is snapped into the partition plate (11).

2. The gas meter of claim 1, wherein, The metering component (2) includes a metering channel (22) and a drainage tube (21). The drainage tube (21) is provided with an elastic buckle (211). The metering channel (22) is connected to the drainage tube (21). The drainage tube (21) passes through the mounting hole (111) and is snapped onto the partition (11) by the elastic buckle (211).

3. The gas meter of claim 2, wherein, The outer wall of the drainage tube (21) is provided with elastic buckles (211) and limiting steps (212) at intervals along the axial direction. The elastic buckles (211) and the limiting steps (212) respectively abut against the opposite sides of the partition (11).

4. The gas meter of claim 3, wherein, The drainage tube (21) has a through hole (213) that corresponds to the elastic buckle (211) and the elastic buckle (211) is positioned opposite the through hole (213).

5. The gas meter of claim 4, wherein, The elastic buckle (211) is disposed in the air outlet chamber (15), and the limiting step (212) is disposed in the air inlet chamber (14).

6. The gas meter of claim 4, wherein, The gas meter also includes a sealing ring fitted on the drain pipe (21), the sealing ring being sandwiched between the limiting step (212) and the partition (11).

7. The gas meter of claim 6, wherein, Multiple elastic buckles (211) are arranged at circumferential intervals along the drainage tube (21).

8. The gas meter of claim 2, wherein, The drainage tube (21) includes a metal frame and a plastic layer covering the metal frame.

9. The gas meter of claim 2, wherein, The outer wall of the drainage tube (21) is provided with a foolproof structure (215), and the wall of the mounting hole (111) is provided with a foolproof mating structure (112).

10. The gas meter of claim 9, wherein, Both the error-proof structure (215) and the error-proof mating structure (112) are planar.

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