Metering module suitable for G4 and G6 ultrasonic gas meters

Abstract

The utility model discloses a metering module suitable for G4 and G6 ultrasonic gas meters, which comprises a measuring pipe section, a transducer, a fixing structure and a flow guide cover, the flow guide cover is fixed on a gas inlet of the measuring pipe section, the transducer is fixed on the side surface of the measuring pipe section, and the fixing structure is detachably connected on a gas outlet of the measuring pipe section; the structure of the measuring pipe section is an integrated structure; the metering module is fixedly connected with an adapter of the G4 ultrasonic gas meter through a fixing structure, or the metering module is fixedly connected with an adapter of the G6 ultrasonic gas meter through a fixing structure. The flow guide cover is clamped and fixed to the air inlet of the measuring pipe section of the integrated structure, the fixing structure is detachably connected to the air outlet of the measuring pipe section of the integrated structure, and the transducer is installed on the side face of the measuring pipe section, so that the metering module is convenient to assemble, and the measuring efficiency is improved by replacing the fixing structure on the measuring pipe section. And the metering module can be used for both the G4 ultrasonic gas meter and the G6 ultrasonic gas meter.

Description

Technical Field

[0001] The utility model relates to the technical field of gas metering, in particular to a metering module applicable to G4 and G6 ultrasonic gas meters. Background Art

[0002] An ultrasonic gas meter is a new type of gas meter that uses modern microelectronics technology, modern sensing technology, and intelligent IC card technology to measure the gas consumption, and perform data remote transmission and settlement transactions. After years of development, it has gradually become stable.

[0003] The structural schematic diagram of the existing metering module is as Figure 2 shown. The flow channel includes a flow channel upper shell 1' and a flow channel lower shell 2'. The structure of the ultrasonic probe 3' on the flow channel is a V-shaped reflection structure, and the flow dividing plate 4' is installed in the flow channel. When assembling the metering module, it is necessary to install the flow dividing plate into the flow channel lower shell, and then assemble the flow channel upper shell and the flow channel lower shell to form a complete flow channel. The installation is inconvenient, and more parts are likely to increase the cost and affect the production efficiency. At the same time, when installing the metering module in the ultrasonic gas meter, the joint specifications of the G4 ultrasonic gas meter and the G6 ultrasonic gas meter are inconsistent. Therefore, it is necessary to use metering modules with corresponding joint sizes and flow channels with different cross-sectional areas respectively. The existing metering module is inconvenient to install and has a single use scenario, and cannot well meet the user's usage requirements.

[0004] In the process of implementing the present utility model, the applicant found that there are at least the following problems in the prior art:

[0005] The existing metering module is inconvenient to install and cannot well meet the user's usage requirements. Content of the Utility Model

[0006] The purpose of the present utility model is to provide a metering module applicable to G4 and G6 ultrasonic gas meters, so as to solve the technical problems in the prior art that the existing metering module is inconvenient to install and cannot well meet the user's usage requirements. The preferred technical solutions provided by the present utility model can produce many technical effects as described below.

[0007] To achieve the above purpose, the present utility model provides the following technical solutions:

[0008] A metering module applicable to G4 and G6 ultrasonic gas meters provided by the utility model includes a measuring pipe section, a transducer, a fixing structure and a flow guide cover. The flow guide cover is fixed on the air inlet of the measuring pipe section, the transducer is fixed on the side of the measuring pipe section, and the fixing structure is detachably connected to the air outlet of the measuring pipe section; the structure of the measuring pipe section is an integral structure; the metering module is fixedly connected to the adapter of the G4 ultrasonic gas meter through the fixing structure, or the metering module is fixedly connected to the adapter of the G6 ultrasonic gas meter through the fixing structure.

[0009] Optionally, a plurality of limiting blocks are arranged on the side surface of the flow guide cover, and a plurality of limiting grooves are arranged on the air inlet. The plurality of limiting blocks and the plurality of limiting grooves are arranged in one-to-one correspondence and are mutually matched; the outer side surface of the limiting block is arranged at an acute angle with the side surface of the flow guide cover; the flow guide cover is clamped and fixed on the air inlet through the mutual cooperation of the limiting block and the limiting groove.

[0010] Optionally, the structure of the flow guide cover is a grid structure arranged in an array, and a reinforcing rib is arranged in the middle of the flow guide cover.

[0011] Optionally, the fixing structure is a G4 fixing joint or a G6 fixing joint. A plurality of mounting holes are arranged on both the G4 fixing joint and the G6 fixing joint, and the mounting holes are arranged in one-to-one correspondence with a plurality of fixing holes on the air outlet; the G4 fixing joint or the G6 fixing joint is fixedly arranged on the air outlet through the mutual cooperation of the mounting holes, the fixing holes and the connecting piece.

[0012] Optionally, the first end of the G4 fixing joint corresponds to the air outlet, the second end of the G4 fixing joint corresponds to the adapter of the G4 ultrasonic gas meter, and the inner diameter of the first end of the G4 fixing joint is larger than the inner diameter of the second end of the G4 fixing joint;

[0013] The first end of the G6 fixing joint corresponds to the air outlet, the second end of the G6 fixing joint corresponds to the adapter of the G6 ultrasonic gas meter, and the inner diameter of the first end of the G6 fixing joint is smaller than the inner diameter of the second end of the G6 fixing joint.

[0014] Optionally, the transducer includes an upstream ultrasonic probe and a downstream ultrasonic probe. The upstream ultrasonic probe is fixed on the first side of the measuring pipe section, and the upstream ultrasonic probe is adjacent to the air inlet of the measuring pipe section; the downstream ultrasonic probe is fixed on the second side of the measuring pipe section, and the downstream ultrasonic probe is adjacent to the air outlet of the measuring pipe section.

[0015] Optionally, the ultrasonic wave emitted by the upstream ultrasonic probe is first reflected on the first inner wall of the measurement pipe section to the second inner wall of the measurement pipe section, and then secondarily reflected by the second inner wall to the downstream ultrasonic probe and received by the downstream ultrasonic probe; the ultrasonic wave emitted by the downstream ultrasonic probe is first reflected on the second inner wall to the first inner wall, and then secondarily reflected by the first inner wall to the upstream ultrasonic probe and received by the upstream ultrasonic probe; the path of the ultrasonic wave in the measurement pipe section is an N-shaped walking path.

[0016] Optionally, the transducer further includes a first probe pressing plate and a second probe pressing plate. The first probe pressing plate is disposed on the upstream ultrasonic probe for fixing the upstream ultrasonic probe; the second probe pressing plate is disposed on the downstream ultrasonic probe for fixing the downstream ultrasonic probe.

[0017] Both the first probe pressing plate and the second probe pressing plate are provided with through holes and symmetrically arranged connecting ears; both the first probe pressing plate and the second probe pressing plate are clamped on the corresponding protrusions on the measurement pipe section through the connecting ears; the leads on the upstream ultrasonic probe and the downstream ultrasonic probe can both pass through the corresponding through holes.

[0018] Optionally, the cross-section of the air inlet of the measurement pipe section is circular, and the cross-section of the metering section of the measurement pipe section is rectangular.

[0019] Optionally, it further includes a metering circuit board and an installation groove. The installation groove is fixed on the side of the measurement pipe section; the metering circuit board is fixed in the installation groove, and the metering circuit board is electrically connected to the transducer.

[0020] Implementing one of the above technical solutions of the present utility model has the following advantages or beneficial effects:

[0021] By clamping and fixing the flow guide cover on the air inlet of the integrally structured measurement pipe section, and the fixing structure is detachably connected to the air outlet of the integrally structured measurement pipe section, and the transducer is installed on the side of the measurement pipe section, the metering module is convenient to assemble. By replacing the fixing structure on the measurement pipe section, the metering module can be used for both G4 ultrasonic gas meters and G6 ultrasonic gas meters. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0023] Figure 1 is a perspective view of an embodiment of the present utility model;

[0024] Figure 2 is a schematic structural view of an existing metering module;

[0025] Figure 3 is a sectional view of an embodiment of the present utility model;

[0026] Figure 4 is a first exploded view of an embodiment of the present utility model;

[0027] Figure 5 is a second exploded view of an embodiment of the present utility model;

[0028] Figure 6 is a schematic view of a G4 fixed joint of an embodiment of the present utility model;

[0029] Figure 7 is a schematic view of a G6 fixed joint of an embodiment of the present utility model.

[0030] In the figure: 1, measuring pipe section; 11, limiting groove; 12, fixing hole; 13, first inner wall; 14, second inner wall; 15, protrusion; 2, transducer; 21, upstream ultrasonic probe; 22, downstream ultrasonic probe; 23, first probe pressing plate; 24, second probe pressing plate; 25, through hole; 26, connecting ear; 3, fixing structure; 31, G4 fixed joint; 32, G6 fixed joint; 33, mounting hole; 4, flow guide cover; 41, limiting block; 42, reinforcing rib; 5, metering circuit board; 6, mounting groove. Specific embodiments

[0031] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, various exemplary embodiments to be described below will refer to the corresponding drawings, which form a part of the exemplary embodiments and describe various exemplary embodiments that may be adopted to implement the present utility model. Unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. It should be understood that they are only examples of processes, methods, devices, etc. that are consistent with some aspects of the present utility model disclosed in detail in the appended claims. Other embodiments may also be used, or structural and functional modifications may be made to the embodiments listed herein without departing from the scope and essence of the present utility model.

[0032] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", etc. indicate the orientation or positional relationship based on the orientation shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated elements must have a specific orientation, be constructed and operated in a specific orientation. The terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. The meaning of the term "plurality" is two or more. The terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a communication connection, a direct connection, an indirect connection through an intermediate medium. It can be the internal communication of two elements or the interaction relationship between two elements. The term "and / or" includes any and all combinations of one or more of the related listed items. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] In order to illustrate the technical solutions described in the present utility model, the following will be described by means of specific embodiments, and only the parts related to the embodiments of the present utility model are shown.

[0034] Embodiment 1:

[0035] As Figure 1As shown in the figure, the utility model provides a metering module applicable to G4 and G6 ultrasonic gas meters, which includes a measuring pipe section 1, a transducer 2, a fixing structure 3 and a flow guide cover 4. The flow guide cover 4 is fixed on the air inlet of the measuring pipe section 1, the transducer 2 is fixed on the side of the measuring pipe section 1, the fixing structure 3 is detachably connected to the air outlet of the measuring pipe section 1, and the structure of the measuring pipe section 1 is an integral structure. The metering module is fixedly connected to the adapter of the G4 ultrasonic gas meter through the fixing structure 3, or the metering module is fixedly connected to the adapter of the G6 ultrasonic gas meter through the fixing structure 3. Specifically, the structure of the measuring pipe section 1 is an integral structure, which combines the existing flow channel upper shell and the flow channel lower shell into one. Only one set of molds is required during production and processing, and the production process is simple, which is beneficial to improving production efficiency. At the same time, the integral structure of the measuring pipe section 1 does not require assembly, which can reduce parts, lower production costs, and also reduce production processes and improve production efficiency. The flow guide cover 4 can be directly fixed on the air inlet of the measuring pipe section 1, which is convenient for assembly. The fixing structure 3 is detachably connected to the air outlet of the measuring pipe section 1. The fixing structure 3 on the measuring pipe section 1 can be replaced according to whether the ultrasonic gas meter is a G4 ultrasonic gas meter or a G6 ultrasonic gas meter, so as to meet the requirement that the metering module can be used on both G4 ultrasonic gas meters and G6 ultrasonic gas meters, and increase the usage demand of the metering module. Gas enters the measuring pipe section 1 from the air inlet direction of the measuring pipe section 1 through the flow guide cover 4 (as described below) and flows out from the air outlet of the measuring pipe section 1. When the ultrasonic wave emitted by the transducer 2 on the measuring pipe section 1 can pass through the gas, the gas flow information in the measuring pipe section 1 can be measured according to the signal received by the transducer 2, and the metering of the gas consumption is completed.

[0036] The utility model fixes the flow guide cover 4 on the air inlet of the integral structure of the measuring pipe section 1 by clamping, the fixing structure 3 is detachably connected to the air outlet of the integral structure of the measuring pipe section 1, and the transducer 2 is installed on the side of the measuring pipe section 1, which is convenient for assembling the metering module. By replacing the fixing structure 3 on the measuring pipe section 1, the metering module can be made to be applicable to both G4 ultrasonic gas meters and G6 ultrasonic gas meters.

[0037] As an optional implementation mode, such as Figure 4As shown in the figure, a plurality of limit blocks 41 are arranged on the side surface of the fairing 4, and a plurality of limit grooves 11 are provided on the air inlet. The plurality of limit blocks 41 and the plurality of limit grooves 11 are arranged in one-to-one correspondence and are mutually matched. The outer side surface of the limit block 41 is arranged at an acute angle with the side surface of the fairing 4. The fairing 4 is clamped and fixed on the air inlet through the mutual cooperation of the limit block 41 and the limit groove 11. Specifically, the material of the limit block 41 is an elastic material. When the fairing 4 is inserted into the air inlet, the plurality of limit blocks 41 on the fairing 4 are arranged in one-to-one correspondence with the plurality of limit grooves 11 on the air inlet, and the outer side surface of the limit block 41 is compressed and deformed. When the limit block 41 reaches the bottom of the limit groove 11, the outer side surface of the limit block 41 resumes deformation, and the limit groove 11 limits and fixes the limit block 41, realizing the clamping connection of the fairing 4 to the air inlet of the measuring pipe section 1.

[0038] As an alternative embodiment, as Figure 4 shown in the figure, the structure of the fairing 4 is a grid structure arranged in an array, and a reinforcing rib 42 is provided in the middle of the fairing 4. Specifically, the fairing 4 with a grid structure arranged in an array can ensure that the gas is in a relatively stable state, i.e., a laminar flow state, after entering the measuring pipe section 1. Since the air flow in the middle of the fairing 4 is relatively strong, a reinforcing rib 42 is provided in the middle of the fairing 4, which can strengthen the overall stability of the fairing 4, the grid structure is not easily broken, and the service life of the fairing 4 is improved. The reinforcing rib 42 is a circular structure and is integrally formed with the grid structure.

[0039] As an alternative embodiment, as Figure 5As shown, the fixing structure 3 is a G4 fixing joint 31 or a G6 fixing joint 32. Multiple mounting holes 33 are provided on both the G4 fixing joint 31 and the G6 fixing joint 32, and the mounting holes 33 correspond one by one to the multiple fixing holes 12 on the air outlet. The G4 fixing joint 31 or the G6 fixing joint 32 is fixedly installed on the air outlet through the cooperation of the mounting holes 33 and the fixing holes 12 with the connecting piece. Specifically, the metering module can replace the fixing structure 3 on the metering module according to the requirements of the ultrasonic gas meter, thereby increasing the usage scenarios of the metering module and improving the applicable range of the metering module. When the ultrasonic gas meter is a G4 ultrasonic gas meter, the fixing structure 3 installed on the metering module is the G4 fixing joint 31, ensuring that the metering module can be adapted to the G4 ultrasonic gas meter and can be installed on the G4 ultrasonic gas meter. When the ultrasonic gas meter is a G6 ultrasonic gas meter, the fixing structure 3 installed on the metering module is the G6 fixing joint 32, ensuring that the metering module can be adapted to the G6 ultrasonic gas meter and can be installed on the G6 ultrasonic gas meter. By replacing the fixing structure 3 on the measuring pipe section 1, the utilization rate of the measuring pipe section 1 can be improved. Multiple pipe section holes are provided on the air outlet of the measuring pipe section 1, and the fixing holes 12 correspond and match with the mounting holes 33 on the fixing structure 3. The fixing structure 3 is fixedly installed on the air outlet of the measuring pipe section 1 by a connecting piece (such as a screw, a bolt, etc.) passing through the mounting holes 33 and the fixing holes 12 in sequence.

[0040] As an alternative embodiment, as Figure 6 and Figure 7 shown, the first end of the G4 fixing joint 31 corresponds to the air outlet, the second end of the G4 fixing joint 31 corresponds to the adapter of the G4 ultrasonic gas meter, and the inner diameter of the first end of the G4 fixing joint 31 is greater than the inner diameter of the second end of the G4 fixing joint 31. The first end of the G6 fixing joint 32 corresponds to the air outlet, the second end of the G6 fixing joint 32 corresponds to the adapter of the G6 ultrasonic gas meter, and the inner diameter of the first end of the G6 fixing joint 32 is less than the inner diameter of the second end of the G6 fixing joint 32. Specifically, the inner diameter of the first end of the G4 fixing joint 31 being greater than the inner diameter of the second end of the G4 fixing joint 31 can reduce the flow rate of the gas flowing out of the air outlet of the measuring pipe section 1 and transition to the G4 ultrasonic gas meter to meet the flow rate section of the G4 ultrasonic gas meter. The inner diameter of the first end of the G6 fixing joint 32 being less than the inner diameter of the second end of the G6 fixing joint 32 can increase the flow rate of the gas flowing out of the air outlet of the measuring pipe section 1 and transition to the G6 ultrasonic gas meter to meet the flow rate section of the G6 ultrasonic gas meter.

[0041] As an alternative embodiment, alternatively as Figure 3As shown, the energy detector 2 includes an upstream ultrasonic probe 21 and a downstream ultrasonic probe 22. The upstream ultrasonic probe 21 is fixed on the first side of the measuring pipe section 1, and the upstream ultrasonic probe 21 is adjacent to the air inlet of the measuring pipe section 1. The downstream ultrasonic probe 22 is fixed on the second side of the measuring pipe section 1, and the downstream ultrasonic probe 22 is adjacent to the air outlet of the measuring pipe section 1. Specifically, a first installation position for installing the upstream ultrasonic probe 21 is provided on the first side of the measuring pipe section 1, and the upstream ultrasonic probe 21 is fixed in the first installation position. A second installation position for installing the downstream ultrasonic probe 22 is provided on the second side of the measuring pipe section 1, and the downstream ultrasonic probe 22 is fixed in the second installation position.

[0042] As an alternative embodiment, as Figure 3 shown, the ultrasonic wave emitted by the upstream ultrasonic probe 21 is first reflected on the first inner wall 13 of the measuring pipe section 1 and then reaches the second inner wall 14 of the measuring pipe section 1, and then is secondarily reflected on the second inner wall 14 and received by the downstream ultrasonic probe 22. The ultrasonic wave emitted by the downstream ultrasonic probe 22 is first reflected on the second inner wall 14 and then reaches the first inner wall 13, and then is secondarily reflected on the first inner wall 13 and received by the upstream ultrasonic probe 21. The path of the ultrasonic wave in the measuring pipe section 1 is an N-shaped walking path. Specifically, the upstream ultrasonic probe 21 is inclined and arranged on the first side of the measuring pipe section 1, and the downstream ultrasonic probe 22 is inclined and arranged on the second side of the measuring pipe section 1, ensuring that the ultrasonic wave emitted by the upstream ultrasonic probe 21 can be transmitted to the downstream ultrasonic probe 22 after two reflections on the first inner wall 13 and the second inner wall 14, and the ultrasonic wave emitted by the downstream ultrasonic probe 22 can be transmitted to the upstream ultrasonic probe 21 after two reflections on the second inner wall 14 and the first inner wall 13. The upstream ultrasonic probe 21 emits ultrasonic waves at a certain angle to the first inner wall 13, and the first inner wall 13 reflects the received ultrasonic wave and reflects it to the second inner wall 14, and then is reflected by the second inner wall 14 to the downstream ultrasonic probe 22, so that the downstream ultrasonic probe 22 receives the signal of the ultrasonic wave emitted by the upstream ultrasonic probe 21. The downstream ultrasonic probe 22 emits ultrasonic waves at a certain angle to the second inner wall 14, and the second inner wall 14 reflects the received ultrasonic wave and reflects it to the first inner wall 13, and then is reflected by the first inner wall 13 to the upstream ultrasonic probe 21, so that the upstream ultrasonic probe 21 receives the signal of the ultrasonic wave emitted by the downstream ultrasonic probe 22. The path of the ultrasonic wave emitted between the upstream ultrasonic probe 21 and the downstream ultrasonic probe 22 is an N-shaped walking path. By passing the ultrasonic wave through the gas in the measuring pipe section 1 multiple times, the gas consumption in the measuring pipe section 1 is detected.

[0043] As an alternative embodiment, as Figure 4As shown, the transducer 2 further includes a first probe pressing plate 23 and a second probe pressing plate 24. The first probe pressing plate 23 is disposed on the upstream ultrasonic probe 21 for fixing the upstream ultrasonic probe 21, and the second probe pressing plate 24 is disposed on the downstream ultrasonic probe 22 for fixing the downstream ultrasonic probe 22. Through holes 25 and symmetric connection ears 26 are provided on both the first probe pressing plate 23 and the second probe pressing plate 24. Both the first probe pressing plate 23 and the second probe pressing plate 24 are clamped on the corresponding protrusions 15 on the measuring pipe section 1 through the connection ears 26; the leads on the upstream ultrasonic probe 21 and the downstream ultrasonic probe 22 can pass through the corresponding through holes 25. Specifically, the upstream ultrasonic probe 21 is installed in the first installation position. The first probe pressing plate 23 is disposed on the upstream ultrasonic probe 21. The lead on the upstream ultrasonic probe 21 passes through the through hole 25 of the first probe pressing plate 23 and is exposed outside the first installation position. The symmetric connection ears 26 on the first probe pressing plate 23 cooperate with the corresponding protrusions 15 on the first installation position to clamp and fix the first probe pressing plate 23 on the first installation position, so as to press and fix the upstream ultrasonic probe 21 in the first installation position. The downstream ultrasonic probe 22 is installed in the second installation position. The second probe pressing plate 24 is disposed on the downstream ultrasonic probe 22. The lead on the downstream ultrasonic probe 22 passes through the through hole 25 of the second probe pressing plate 24 and is exposed outside the second installation position. The symmetric connection ears 26 on the second probe pressing plate 24 cooperate with the corresponding protrusions 15 on the second installation position to clamp and fix the second probe pressing plate 24 on the second installation position, so as to press and fix the downstream ultrasonic probe 22 in the second installation position.

[0044] As an optional implementation manner, as Figure 4 shown, the cross-section of the air inlet of the measuring pipe section 1 is circular, and the cross-section of the metering section of the measuring pipe section 1 is rectangular. Specifically, the cross-section of the air inlet of the measuring pipe section 1 is circular, which is convenient for fixed connection with the fairing 4 and the air pipe. The cross-section of the metering section of the measuring pipe section 1 is rectangular, which is convenient for the ultrasonic waves emitted by the transducer 2 to be reflected by the inner wall of the measuring pipe section 1 on the corresponding inner wall. The cross-section of the measuring pipe section 1 can be adaptively set to different shapes according to actual needs as long as it can play a role in rectification.

[0045] As an optional implementation manner, as Figure 5As shown, it further includes a metering circuit board 5 and a mounting groove 6. The mounting groove 6 is fixed on the side of the measuring pipe section 1. The metering circuit board 5 is fixed in the mounting groove 6, and the metering circuit board 5 is electrically connected to the transducer 2. Specifically, the mounting groove 6 and the measuring pipe section 1 are integrally formed, which is convenient for production and processing, can reduce components, and lower production costs. The metering circuit board 5 and the mounting groove 6 match each other, and the metering circuit board 5 is fixed in the mounting groove 6. The metering circuit board 5 can obtain the signal of the transducer 2, and measure the relevant information of the flow rate of the measuring pipe section 1 through the signal of the transducer 2, such as cumulative usage, instantaneous flow rate, flight time, abnormal flow rate judgment, etc.

[0046] The embodiment is only a special case and does not indicate that the present utility model has only such an implementation manner.

[0047] The above are only the preferred embodiments of the present utility model. Those skilled in the art know that without departing from the spirit and scope of the present utility model, various changes or equivalent replacements can be made to these features and embodiments. In addition, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the protection scope of the present utility model.

Claims

1. A metering module applicable to G4 and G6 ultrasonic gas meters, characterized in that, It includes a measuring pipe section (1), a transducer (2), a fixing structure (3) and a flow deflector (4). The flow deflector (4) is fixed on the air inlet of the measuring pipe section (1). The transducer (2) is fixed on the side of the measuring pipe section (1). The fixing structure (3) is detachably connected to the air outlet of the measuring pipe section (1). The structure of the measuring pipe section (1) is an integral structure. The metering module is fixedly connected to the adapter of the G4 ultrasonic gas meter or the G6 ultrasonic gas meter through the fixing structure (3).

2. The metering module applicable to G4 and G6 ultrasonic gas meters according to claim 1, wherein, A plurality of limit blocks (41) are arranged on the side of the flow deflector (4). A plurality of limit grooves (11) are provided on the air inlet. The plurality of limit blocks (41) and the plurality of limit grooves (11) are arranged in one-to-one correspondence and are mutually matched. The outer side of the limit block (41) is arranged at an acute angle with the side of the flow deflector (4). The flow deflector (4) is snap-fitted and fixed on the air inlet through the cooperation of the limit block (41) and the limit groove (11).

3. The metering module applicable to G4 and G6 ultrasonic gas meters according to claim 2, characterized in that The structure of the flow deflector (4) is a grid structure arranged in an array, and a reinforcing rib (42) is provided in the middle of the flow deflector (4).

4. The metering module applicable to G4 and G6 ultrasonic gas meters according to claim 1, characterized in that, The fixing structure (3) is a G4 fixing joint (31) or a G6 fixing joint (32). A plurality of mounting holes (33) are provided on both the G4 fixing joint (31) and the G6 fixing joint (32). The mounting holes (33) are arranged in one-to-one correspondence with a plurality of fixing holes (12) on the air outlet. The G4 fixing joint (31) or the G6 fixing joint (32) is fixed on the air outlet through the cooperation of the mounting holes (33), the fixing holes (12) and a connecting member.

5. The metering module applicable to G4 and G6 ultrasonic gas meters according to claim 4, characterized in that, The first end of the G4 fixing joint (31) corresponds to the air outlet, and the second end of the G4 fixing joint (31) corresponds to the adapter of the G4 ultrasonic gas meter. The inner diameter of the first end of the G4 fixing joint (31) is larger than the inner diameter of the second end of the G4 fixing joint (31). The first end of the G6 fixing joint (32) corresponds to the air outlet, and the second end of the G6 fixing joint (32) corresponds to the adapter of the G6 ultrasonic gas meter. The inner diameter of the first end of the G6 fixing joint (32) is smaller than the inner diameter of the second end of the G6 fixing joint (32).

6. The metering module applicable to G4 and G6 ultrasonic gas meters according to claim 1, wherein The transducer (2) includes an upstream ultrasonic probe (21) and a downstream ultrasonic probe (22). The upstream ultrasonic probe (21) is fixed on the first side of the measuring pipe section (1), and the upstream ultrasonic probe (21) is adjacent to the air inlet of the measuring pipe section (1). The downstream ultrasonic probe (22) is fixed on the second side of the measuring pipe section (1), and the downstream ultrasonic probe (22) is adjacent to the air outlet of the measuring pipe section (1).

7. The metering module applicable to G4 and G6 ultrasonic gas meters according to claim 6, characterized in that, The ultrasonic wave emitted by the upstream ultrasonic probe (21) is first reflected on the first inner wall (13) of the measurement pipe section (1) and then reaches the second inner wall (14) of the measurement pipe section (1), and is then reflected a second time by the second inner wall (14) to the downstream ultrasonic probe (22) and received by the downstream ultrasonic probe (22); the ultrasonic wave emitted by the downstream ultrasonic probe (22) is first reflected on the second inner wall (14) and then reaches the first inner wall (13), and is then reflected a second time by the first inner wall (13) to the upstream ultrasonic probe (21) and received by the upstream ultrasonic probe (21); the path of the ultrasonic wave in the measurement pipe section (1) is an N-shaped walking path.

8. The metering module applicable to G4 and G6 ultrasonic gas meters according to claim 6, characterized in that, The transducer (2) further includes a first probe pressing plate (23) and a second probe pressing plate (24). The first probe pressing plate (23) is arranged on the upstream ultrasonic probe (21) for fixing the upstream ultrasonic probe (21); the second probe pressing plate (24) is arranged on the downstream ultrasonic probe (22) for fixing the downstream ultrasonic probe (22). Both the first probe pressing plate (23) and the second probe pressing plate (24) are provided with through holes (25) and symmetrically arranged connecting lugs (26); both the first probe pressing plate (23) and the second probe pressing plate (24) are clamped on the corresponding protrusions (15) on the measurement pipe section (1) through the connecting lugs (26); the leads on the upstream ultrasonic probe (21) and the downstream ultrasonic probe (22) can pass through the corresponding through holes (25).

9. The metering module applicable to G4 and G6 ultrasonic gas meters according to claim 1, wherein The cross-section of the air inlet of the measurement pipe section (1) is circular, and the cross-section of the metering section of the measurement pipe section (1) is rectangular.

10. The metering module applicable to G4 and G6 ultrasonic gas meters according to any one of claims 1-9, characterized in that, It further includes a metering circuit board (5) and a mounting groove (6). The mounting groove (6) is fixed on the side of the measurement pipe section (1); the metering circuit board (5) is fixed in the mounting groove (6), and the metering circuit board (5) is electrically connected to the transducer (2).

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