Ultrasonic gas meter sensor integrated with flow channel structure

Abstract

The utility model discloses an ultrasonic gas meter sensor integrated with a flow channel structure, and relates to the technical field of ultrasonic gas sensors. The device comprises a flow channel structure and a transducer assembly, a first mounting part and a second mounting part are integrally arranged on the runner structure; each of the first mounting part and the second mounting part comprises a bottom wall and a side wall, and the bottom wall and the side wall form a cavity; the transducer assembly is arranged in the cavity to form the ultrasonic gas meter sensor. According to the utility model, the bottom wall and the side wall in the first mounting part and the second mounting part are used as the matching layer and the shell of the transducer, so that the transducer assembly can be directly mounted in the cavity formed by the first mounting part and the second mounting part; according to the technical scheme, impurities can be prevented from appearing between the connecting portions of the transducer assembly and the flow channel structure while the material cost is saved, position deviation is avoided during installation, and the accuracy of transducer detection can be improved while the accuracy of the position during installation is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic gas sensors, in particular to an ultrasonic gas meter sensor integrated with a flow channel structure. Background Art

[0002] As a measuring instrument, a gas flow sensor has the function of automatically accumulating volume and can accurately measure gas flow. For example, for users of ultrasonic gas meters using natural gas or pipeline gas, it is more convenient to know the gas consumption so as to pay the fee according to the cubic meters of gas consumed per month.

[0003] At present, due to its advanced technology and easy intelligence, ultrasonic gas flow sensors are gradually moving from the industrial field to the household field. Especially in recent years, ultrasonic gas flow sensors have been emerging in the gas meter market with strong momentum and have been widely used in the household field. However, an ultrasonic gas meter belongs to a type of velocity flowmeter and is sensitive to the flow field in the measurement pipeline. If the flow field changes, it will affect the metering performance of the ultrasonic gas meter. Therefore, ultrasonic gas sensors have high installation requirements for the ultrasonic transducers and the position of the flow channel structure.

[0004] In traditional ultrasonic gas sensors, the transducer and the flow channel structure are both independent modules. The transducer is correspondingly installed in the installation hole of the flow channel structure. After forming the ultrasonic gas sensor, it can be put into use to measure the gas flow. However, in this way, impurities, dust or pollutants are likely to accumulate on the side wall of the installation hole of the flow channel structure, and the transducer is likely to be installed incorrectly in the installation hole, which will affect the measurement accuracy of the ultrasonic sensor.

[0005] In the process of implementing the present utility model, the inventor found that there are at least the following problems in the prior art:

[0006] The existing flow channel structure affects the installation of the transducer, thereby affecting the measurement accuracy of the ultrasonic sensor. Summary of the Utility Model

[0007] The purpose of the present utility model is to provide an ultrasonic gas meter sensor integrated with a flow channel structure to solve the technical problem that the existing flow channel structure affects the installation of the transducer and the measurement accuracy of the ultrasonic sensor. The preferred technical solutions provided by the present utility model can produce many technical effects, which will be elaborated below.

[0008] To achieve the above purpose, the present utility model provides the following technical solutions:

[0009] An ultrasonic gas meter sensor integrated with a flow channel structure provided by the present utility model includes: a flow channel structure and a transducer assembly;

[0010] The first mounting portion and the second mounting portion are integrally provided on the flow channel structure;

[0011] Both the first mounting portion and the second mounting portion include a bottom wall and a side wall, and the bottom wall and the side wall form a cavity; the transducer assembly is disposed in the cavity to form an ultrasonic gas meter sensor.

[0012] Optionally, the transducer assembly includes a piezoelectric layer and a packaging layer; the piezoelectric layer is disposed in the cavity and is connected to the bottom wall; the packaging layer is disposed on the piezoelectric layer for packaging the piezoelectric layer.

[0013] Optionally, the piezoelectric layer includes piezoelectric ceramics, a positive electrode, and a negative electrode. The positive electrode and the negative electrode are welded to the piezoelectric ceramics, and the signals of the positive electrode and the negative electrode are led outwards through connecting wires.

[0014] Optionally, the material used for the packaging layer is epoxy resin.

[0015] Optionally, the flow channel structure includes a flow channel body and a mounting body, and the mounting body is connected to the flow channel body;

[0016] A gas flow channel is provided on the flow channel body, and the first mounting portion and the second mounting portion are integrally provided on the mounting body.

[0017] Optionally, the first mounting portion and the second mounting portion are symmetrically arranged obliquely on the mounting body, and an included angle is formed between the first mounting portion and the second mounting portion.

[0018] Optionally, the included angle between the first mounting portion and the second mounting portion ranges from 45° to 90°.

[0019] Optionally, an air inlet and an air outlet are respectively provided on opposite sides of the flow channel body, and the air inlet is connected to an external gas channel; a gas flow channel is formed between the air inlet and the air outlet.

[0020] Optionally, the air inlet is provided with a grid structure, and the grid structure is used to stably guide the gas input from the external gas channel into the gas flow channel.

[0021] Optionally, a limiting block is provided on the flow channel body, and a clamping groove is provided on the mounting body. The mounting body is snap-fitted to the flow channel body through the clamping groove and the limiting block.

[0022] Implementing one of the above technical solutions of the present utility model has the following advantages or beneficial effects:

[0023] In this embodiment, the bottom wall and the side wall in the first mounting portion and the second mounting portion are used as the matching layer and the housing of the transducer, enabling the transducer assembly to be directly mounted in the cavity formed by the first mounting portion and the second mounting portion. This not only saves material costs but also avoids impurities from appearing between the connection parts of the transducer assembly and the flow channel structure, ensuring the normal use of the transducer. Moreover, since the transducer assembly is directly mounted in the first mounting portion and the second mounting portion, there will be no position deviation. This not only ensures the accuracy of the position during installation but also improves the accuracy of transducer detection. Description of the Drawings

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:

[0025] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0026] Figure 2 is the cross-sectional view of the mounting body in the embodiment of the present invention;

[0027] Figure 3 is the split schematic diagram of the flow channel structure in the embodiment of the present invention.

[0028] In the figures: 1. Flow channel structure; 11. Flow channel body; 111. Mounting hole; 112. Limiting block; 113. Air inlet; 114. Air outlet; 12. Mounting body; 121. First mounting portion; 122. Second mounting portion; 123. Side wall; 124. Bottom wall; 125. Card slot; 2. Transducer assembly; 21. Piezoelectric layer; 211. Connecting wire; 22. Encapsulation layer. Detailed Embodiments

[0029] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following various exemplary embodiments to be described will refer to the corresponding drawings, which form a part of the exemplary embodiments and describe various exemplary embodiments that may be used to implement the present invention. 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, and devices, etc., that are consistent with some aspects of the present invention disclosed in the appended claims in detail. 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 invention.

[0030] In the description of the present utility model, it should be understood that the terms "center", "longitudinal direction", "lateral direction", 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 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 communication inside 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.

[0031] In order to illustrate the technical solution described in the present utility model, the following will be described through specific embodiments, and only the parts related to the embodiments of the present utility model are shown.

[0032] Embodiment:

[0033] As Figures 1-3 shown, the present utility model provides an ultrasonic gas meter sensor integrated with a flow channel structure, including: a flow channel structure 1 and a transducer assembly 2; a first mounting portion 121 and a second mounting portion 122 are integrally provided on the flow channel structure 1; both the first mounting portion 121 and the second mounting portion 122 include a bottom wall 124 and a side wall 123, and the bottom wall 124 and the side wall 123 form a cavity; the transducer assembly 2 is disposed in the cavity to form an ultrasonic gas meter sensor.

[0034] Specifically, as Figure 1 shown, a first mounting portion 121 and a second mounting portion 122 are integrally provided on the flow channel structure 1 for mounting the transducer assembly 2. After the transducer assembly 2 is mounted in the first mounting portion 121, an upstream transducer is formed. After the transducer assembly 2 is mounted in the second mounting portion 122, a downstream transducer is formed. The upstream transducer and the downstream transducer form a certain angle on the flow channel structure 1 for transmitting and receiving ultrasonic waves, and in combination with the flow channel structure 1, an ultrasonic gas meter sensor is formed to detect the gas flow rate.

[0035] The structures, shapes and functions of the first mounting portion 121 and the second mounting portion 122 are the same. In this embodiment, only the structure of one of the mounting portions will be described in detail. As Figure 2As shown, the first mounting portion 121 includes a side wall 123 and a bottom wall 124. The bottom wall 124 is equivalent to the matching layer in the transducer, and the side wall 123 is equivalent to the housing in the transducer. Therefore, only by installing the transducer assembly 2 in the cavity formed by the bottom wall 124 and the side wall 123 can a transducer be formed. Moreover, the first mounting portion 121 and the second mounting portion 122 are integrally provided with the flow channel structure 1, which can not only ensure the accurate installation of the transducer assembly 2 but also save the manufacturing costs of the flow channel structure 1 and the transducer.

[0036] In this embodiment, the bottom wall 124 and the side wall 123 in the first mounting portion 121 and the second mounting portion 122 are used as the matching layer and the housing of the transducer, enabling the transducer assembly 2 to be directly installed in the cavity formed by the first mounting portion 121 and the second mounting portion 122. This can save material costs and avoid impurities from appearing between the connection parts of the transducer assembly 2 and the flow channel structure 1, ensuring the normal use of the transducer. Additionally, since the transducer assembly 2 is directly installed in the first mounting portion 121 and the second mounting portion 122, there will be no position deviation, which can not only ensure the accuracy of the installation position but also improve the accuracy of transducer detection.

[0037] As an alternative embodiment, as Figure 2 shown, the transducer assembly 2 includes a piezoelectric layer 21 and a packaging layer 22. The piezoelectric layer 21 is disposed in the cavity and is connected to the bottom wall 124. The packaging layer 22 is disposed on the piezoelectric layer 21 for packaging the piezoelectric layer 21. Specifically, since the bottom wall 124 and the side wall 123 in the first mounting portion 121 and the second mounting portion 122 are equivalent to the matching layer and the housing in the transducer, only by installing the piezoelectric layer 21 and the packaging layer 22 in the first mounting portion 121 and the second mounting portion 122 can an ultrasonic gas meter sensor be formed in combination with the flow channel structure 1.

[0038] The piezoelectric layer 21 is disposed in the cavity and is connected to the bottom wall 124. Before connecting the piezoelectric layer 21 to the bottom wall 124, it is necessary to apply glue at the center position of the bottom wall 124, and then place the piezoelectric layer 21 in the cavity to fix the piezoelectric layer 21 to the bottom wall 124. In this embodiment, the material used for applying glue can be selected from one-component epoxy resin or two-component epoxy resin, which is not specifically limited in this embodiment.

[0039] In this embodiment, the piezoelectric layer 21 includes piezoelectric ceramics, a positive electrode, and a negative electrode. The positive electrode and the negative electrode are welded to the piezoelectric ceramics, and the signals of the positive electrode and the negative electrode are led out through a connecting wire 211. The positive electrode and the negative electrode are welded to the piezoelectric ceramics by a soldering iron. The connecting wire 211 is provided on the positive electrode and the negative electrode, as Figure 2As shown, after the positive electrode and the negative electrode are connected to the piezoelectric ceramic, the positive electrode signal and the negative electrode signal are led out through the connection line 211, and thus the piezoelectric layer 21 is formed. Among them, the connection line 211 of the positive electrode and the negative electrode can be connected to an external device to transmit the signal of the transducer to the external device or external circuit, and specifically, no specific limitation is made in this embodiment.

[0040] After the piezoelectric layer 21 is disposed on the bottom wall 124, the installation of the encapsulation layer 22 is required. In this embodiment, the encapsulation layer 22 is actually a layer formed by encapsulating the piezoelectric layer 21 with epoxy resin. After the piezoelectric layer 21 is disposed on the bottom wall 124, epoxy resin needs to be filled in the cavity. The epoxy resin will come into contact with the piezoelectric layer 21 and the side wall 123 to completely fill and encapsulate the voids in the cavity, protecting the piezoelectric layer 21 from the influence of the external environment such as moisture, chemical substances, and dust. The filling of the epoxy resin can also fix the position of the piezoelectric layer 21 to prevent it from loosening or moving during use, and can ensure the stability and reliability of the piezoelectric effect.

[0041] It should also be noted that a silica gel gasket and a PCB board can be added between the piezoelectric layer and the encapsulation layer. The silica gel gasket is used to absorb unnecessary signals emitted by the transducer; the PCB board is connected to the piezoelectric layer and is used to transfer the signal of the piezoelectric ceramic to the PCB board for facilitating the outward lead-out of the signal.

[0042] As an optional implementation manner, as Figure 3 shown, the flow channel structure 1 includes a flow channel body 11 and an installation body 12, and the installation body 12 is connected to the flow channel body 11; a gas flow channel is provided on the flow channel body 11, and the first installation portion 121 and the second installation portion 122 are integrally provided on the installation body 12. Specifically, the flow channel structure 1 includes two parts, namely the flow channel body 11 and the installation body 12. An installation hole 111 having the same size as the installation body 12 is provided at the top of the flow channel body 11 to facilitate the installation of the installation body 12 and ensure that the transducer formed on the installation body 12 detects the flow rate. A plurality of limiting blocks 112 are provided on both sides of the flow channel body 11, and a plurality of clamping slots 125 are provided on both sides of the installation body 12. The limiting blocks 112 and the clamping slots 125 are correspondingly arranged, and the installation body 12 is snap-connected to the flow channel body 11 through the clamping slots 125 and the limiting blocks 112. The settings of the limiting blocks 112 and the clamping slots 125 can ensure the stability of the connection between the installation body 12 and the flow channel body 11, and at the same time can ensure the stability and reliability when the transducer assembly 2 detects the gas flow rate after being installed on the first installation portion 121 and the second installation portion 122.

[0043] As Figure 2As shown in the figure, the first mounting portion 121 and the second mounting portion 122 are symmetrically arranged obliquely on the mounting body 12, and an included angle is formed between the first mounting portion 121 and the second mounting portion 122. Specifically, the transducer assembly 2 is mounted on the first mounting portion 121 and the second mounting portion 122, and is combined with the first mounting portion 121 and the second mounting portion 122 to form an upstream transducer and a downstream transducer. The upstream transducer and the downstream transducer need to form a certain angle on the mounting body 12 in order to transmit and receive ultrasonic waves, so as to detect the gas flow rate of the gas flowing in the gas flow passage of the flow channel body 11 and ensure the accuracy of the detection. Therefore, in order to ensure that the formed upstream transducer and downstream transducer form a certain angle, it is necessary to form an included angle between the first mounting portion 121 and the second mounting portion 122 during design. After the transducer assembly 2 is installed, an included angle is naturally formed between the upstream transducer and the downstream transducer. In this embodiment, the included angle range between the first mounting portion 121 and the second mounting portion 122 is 45° to 90°, and the specific included angle can be set according to the actual situation.

[0044] As an alternative embodiment, as Figure 1 , Figure 3 shown, an air inlet 113 and an air outlet 114 are respectively arranged on opposite sides of the flow channel body 11, and the air inlet 113 is connected to an external gas channel; a gas flow passage is formed between the air inlet 113 and the air outlet 114. Specifically, the air inlet 113 is arranged on the side close to the first mounting portion 121, the air outlet 114 is arranged on the side close to the second mounting portion 122, the air inlet 113 is connected to the external gas channel, and the gas is introduced into the flow channel body 11. After being detected by the upstream transducer and the downstream transducer arranged on the mounting body 12, the gas flows out from the air outlet 114. It should be noted that the channel between the air inlet 113 and the air outlet 114 is the gas flow passage.

[0045] As Figure 1 shown, the air inlet 113 is provided with a grid structure, and the grid structure is used to stably guide the gas input from the external gas channel into the gas flow passage. The setting of the grid structure can stably introduce the gas into the gas flow passage and ensure the stability and accuracy of the sensor detection.

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

[0047] The above are only the preferred embodiments of the present utility model. Those skilled in the art will understand that various changes or equivalent replacements can be made to these features and embodiments without departing from the spirit and scope of the present utility model. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific circumstances 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. An ultrasonic gas meter sensor integrated with a flow channel structure, characterized in that: include: A flow channel structure (1) and a transducer assembly (2); The flow channel structure (1) is integrally provided with a first mounting portion (121) and a second mounting portion (122); The first mounting portion (121) and the second mounting portion (122) both comprise a bottom wall (124) and a side wall (123), wherein the bottom wall (124) and the side wall (123) form a cavity; the transducer assembly (2) is arranged in the cavity to form an ultrasonic gas meter sensor.

2. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 1, characterized in that: The transducer assembly (2) comprises a piezoelectric layer (21) and a packaging layer (22); the piezoelectric layer (21) is arranged in the cavity and connected to the bottom wall (124); the packaging layer (22) is arranged on the piezoelectric layer (21) and is used to package the piezoelectric layer (21).

3. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 2, characterized in that: The piezoelectric layer (21) comprises a piezoelectric ceramic, a positive electrode and a negative electrode, the positive electrode and the negative electrode are welded on the piezoelectric ceramic, and the signals of the positive electrode and the negative electrode are led outwards through a connecting line (211).

4. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 2, characterized in that: The material used for the packaging layer (22) is epoxy resin.

5. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 1, characterized in that: The flow channel structure (1) comprises a flow channel body (11) and a mounting body (12), wherein the mounting body (12) is connected to the flow channel body (11); The flow channel body (11) is provided with a gas circulation channel, and the first mounting portion (121) and the second mounting portion (122) are integrally arranged on the mounting body (12).

6. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 5, characterized in that: The first mounting portion (121) and the second mounting portion (122) are arranged obliquely and symmetrically on the mounting body (12), and an angle is formed between the first mounting portion (121) and the second mounting portion (122).

7. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 6, characterized in that: The included angle between the first mounting portion (121) and the second mounting portion (122) ranges from 45° to 90°.

8. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 5, characterized in that: An air inlet (113) and an air outlet (114) are respectively arranged on opposite sides of the flow channel body (11); the air inlet (113) is connected to an external gas channel; and a gas flow channel is formed between the air inlet (113) and the air outlet (114).

9. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 8, characterized in that: The gas inlet (113) is arranged as a grid structure, and the grid structure is used to stably guide the gas input from the external gas channel into the gas circulation channel.

10. The ultrasonic gas meter sensor integrated with the flow channel structure according to claim 5, characterized in that: The flow channel body (11) is provided with a limit block (112), the installation body (12) is provided with a clamping groove (125), and the installation body (12) is clamped and connected with the flow channel body (11) via the clamping groove (125) and the limit block (112).

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