A differential pressure sensor for a Venturi flow meter assembly

Abstract

This application belongs to the technical field of sensors and discloses a differential pressure sensor for a Venturi flow meter assembly. The sensor includes a differential pressure sensor body, an L-shaped cantilever, and a support member. The L-shaped cantilever has a connecting section and a cantilever section. The connecting section is connected to the differential pressure sensor body. The end of the cantilever section away from the connecting section has an interface for connecting a connector. The support member is located between the cantilever section and the differential pressure sensor body and supports the cantilever section to prevent it from moving towards the differential pressure sensor body under pressure. This increases the stability of the cantilever section and prevents breakage at the connection point between the cantilever section and the connecting section, thereby ensuring the lifespan of the differential pressure sensor and improving the user experience.

Description

Technical Field

[0001] This application belongs to the technical field of sensors, specifically relating to a differential pressure sensor for a Venturi flow meter assembly. Background Technology

[0002] In EGR (Exhaust Gas Recirculation) engines, precise control of the exhaust gas recirculation volume is required. Excessive exhaust gas recirculation will lead to a decrease in power, while insufficient exhaust gas recirculation will result in inadequate NOx emission reduction. Therefore, the Venturi flow meter assembly is a key component in EGR engines. It includes a Venturi tube and a differential pressure sensor located in the Venturi tube. The flow rate is calculated based on the pressure difference between the constriction section (throat) and the inlet section of the Venturi tube measured by the differential pressure sensor, thereby achieving precise measurement of the recirculated exhaust gas flow rate, thus optimizing combustion efficiency and reducing emissions.

[0003] In related technologies, the differential pressure sensor of the Venturi flow meter assembly is affected by factors such as size and connector installation. Therefore, the interface of the differential pressure sensor is usually set in an L-shaped cantilever. This leads to the risk that the interface of the differential pressure sensor is easily broken by stress during transportation, installation and maintenance, which requires the replacement of the damaged differential pressure sensor, thereby affecting the life of the differential pressure sensor and the user experience. Utility Model Content

[0004] This application provides a differential pressure sensor for a Venturi flow meter assembly to ensure the lifespan of the differential pressure sensor and improve the user experience.

[0005] The technical solution adopted in this application is as follows:

[0006] A differential pressure sensor for a Venturi flow meter assembly includes a differential pressure sensor body, an L-shaped cantilever, and a support member. The L-shaped cantilever has a connecting section and a cantilever section. The connecting section is connected to the differential pressure sensor body. The end of the cantilever section away from the connecting section has an interface for connecting a connector. The support member is disposed between the cantilever section and the differential pressure sensor body and is used to support the cantilever section.

[0007] By adopting the above technical solution, since the differential pressure sensor in the application has a support member located between the cantilever section and the differential pressure sensor body, the support member can be used to support the cantilever section to prevent the cantilever section from moving towards the differential pressure sensor body under pressure, thereby increasing the stability of the cantilever section and preventing the connection between the cantilever section and the connecting section from easily breaking, thus ensuring the life of the differential pressure sensor and improving the user experience.

[0008] Furthermore, since a support member is provided between the cantilever section and the differential pressure sensor body, a clearance notch needs to be provided on the connector to accommodate the support member, so that the connector can be fitted onto the outside of the cantilever section and connected to the interface. Through the cooperation of the clearance notch and the support member, the connector can also be positioned, thereby increasing the connection stability between the connector and the differential pressure sensor.

[0009] Optionally, the support member extends along the length of the cantilever segment.

[0010] By adopting the above technical solution, since the support component extends along the length of the cantilever section, the area of ​​the clearance notch that needs to be set on the connector is reduced, so as to ensure the structural strength of the connector and thus ensure the connection stability between the connector and the differential pressure sensor. At the same time, it can also increase the support length of the support component on the cantilever section, so as to further increase the stability of the cantilever section and further ensure the service life of the differential pressure sensor.

[0011] Optionally, the thickness T of the supporting member and the width W of the cantilever segment satisfy: 1 / 10W≤T≤1 / 4W.

[0012] By adopting the above technical solution, since the thickness T of the support member and the width W of the cantilever section satisfy: 1 / 10W≤T≤1 / 4W, the structural strength of the support member is guaranteed on the one hand, so as to ensure the support effect of the support member on the cantilever section. On the other hand, the width of the clearance notch on the connector can be reduced to ensure the structural strength of the connector, thereby ensuring the connection stability between the connector and the differential pressure sensor.

[0013] Optionally, the cantilever section has a connecting surface facing the differential pressure sensor body, the differential pressure sensor body has a supporting surface facing the cantilever section, and the supporting member is arranged perpendicular to the connecting surface and the supporting surface.

[0014] By adopting the above technical solution, since the support component is set perpendicular to the connection surface and the support surface, the support effect of the support component on the cantilever section is further increased, thereby further ensuring the service life of the differential pressure sensor; in addition, it can also reduce the production difficulty of the differential pressure sensor, so as to reduce the production cost of the differential pressure sensor.

[0015] Optionally, the support member has a first end and a second end opposite to the first end, the first end being fixedly connected to the cantilever section, and the second end being fixedly connected to the differential pressure sensor body.

[0016] By adopting the above technical solution, since the first end of the support member is fixedly connected to the cantilever section and the second end of the support member is fixedly connected to the differential pressure sensor body, the support member can be integrally formed with the cantilever section and the differential pressure sensor body, thereby increasing the connection stability between the support member and the cantilever section and the differential pressure sensor body. At the same time, it can also reduce the number of parts required for assembly when producing differential pressure sensors, thereby improving the production efficiency of differential pressure sensors.

[0017] Furthermore, since the first end of the support member is fixedly connected to the cantilever section and the second end of the support member is fixedly connected to the differential pressure sensor body, when the cantilever section is subjected to a tensile force away from the differential pressure sensor body, the support member can also apply a tensile force towards the differential pressure sensor body to the cantilever section, so as to avoid the cantilever section moving away from the differential pressure sensor body and causing the connection between the cantilever section and the connecting section to break, thereby further ensuring the life of the differential pressure sensor.

[0018] Optionally, there is a gap between the support member and the connecting section;

[0019] Alternatively, the support member has a first side and a second side opposite to the first side, the first side being fixedly connected to the connecting segment, and the second side being flush with the end of the cantilever segment away from the connecting segment.

[0020] By adopting the above technical solution, since there is a gap between the support component and the connecting section, the area of ​​the support component is reduced while ensuring the support effect of the support component on the cantilever section. This reduces the amount of raw materials required for the support component and thus lowers the production cost of the differential pressure sensor.

[0021] Because the first side of the support member is fixedly connected to the connecting section, it increases the connection strength between the connecting section and the differential pressure sensor body, thereby increasing the stability of the connecting section and preventing breakage at the connection point due to stress. This further ensures the lifespan of the differential pressure sensor. Furthermore, because the second side of the support member is flush with the end of the cantilever section furthest from the connecting section, it ensures the insertion depth of the connector and the cantilever section, guaranteeing the connection stability.

[0022] Optionally, the cantilever section has a connecting surface facing the differential pressure sensor body, the differential pressure sensor body has a supporting surface facing the cantilever section, and the connecting surface and the supporting surface are respectively provided with receiving grooves, and the two ends of the supporting member extend into the two receiving grooves respectively.

[0023] By adopting the above technical solution, since the two ends of the support member extend into the two receiving grooves respectively, the support member, the cantilever section and the differential pressure sensor body can be formed and set separately, thereby reducing the manufacturing difficulty of the differential pressure sensor and improving the yield of the differential pressure sensor.

[0024] Optionally, the width D1 at the opening of the receiving groove and the width D2 at the bottom of the receiving groove satisfy: D1≤D2, and the end of the supporting member is adapted to the shape of the receiving groove.

[0025] By adopting the above technical solution, since the width at the opening of the receiving groove is smaller than the width at the bottom of the receiving groove, and the end of the supporting member is adapted to the shape of the receiving groove, the connection stability between the supporting member and the receiving groove is increased. This allows the supporting member to not only support the cantilever section, but also, under the cooperation of its own end and the receiving groove, to apply a tensile force towards the differential pressure sensor when the cantilever section is subjected to a tensile force in the direction away from the differential pressure sensor, thereby further increasing the stability of the cantilever section and further ensuring the service life of the differential pressure sensor.

[0026] Optionally, the support member includes a connecting portion and a support portion snapped into the connecting portion, the connecting portion being disposed on the cantilever section and the differential pressure sensor body.

[0027] By adopting the above technical solution, since the connecting part is located on the cantilever section and the differential pressure sensor body, and the support part is snapped into the connecting part, the support part can be separately set from the cantilever section and the differential pressure sensor body, thereby reducing the production difficulty of the differential pressure sensor and improving the yield of the differential pressure sensor.

[0028] Optionally, the connecting part is provided with a snap-fit ​​hole, and the supporting part is provided with a snap-fit ​​arm that snaps into the snap-fit ​​hole.

[0029] By adopting the above technical solution, when assembling the differential pressure sensor, first align the snap-fit ​​arm on the support with the snap-fit ​​hole, and then push the support towards the direction of the connecting part so that the support moves towards the direction of the connecting part, and finally make the snap-fit ​​arm and the snap-fit ​​hole snap together to complete the assembly of the differential pressure sensor. In this process, only the support needs to be pushed, thereby reducing the assembly difficulty of the differential pressure sensor.

[0030] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0031] 1. The pressure sensor in this application includes a differential pressure sensor body, an L-shaped cantilever, and a support member. The L-shaped cantilever has a connecting section and a cantilever section. The connecting section is connected to the differential pressure sensor body. The end of the cantilever section away from the connecting section has an interface for connecting a connector. The support member is located between the cantilever section and the differential pressure sensor body and is used to support the cantilever section to prevent it from moving towards the differential pressure sensor body under pressure. This increases the stability of the cantilever section and prevents it from easily breaking at the connection between the cantilever section and the connecting section, thereby ensuring the lifespan of the differential pressure sensor and improving the user experience.

[0032] 2. The support member in this application extends along the length of the cantilever section, thereby reducing the area of ​​the clearance notch that needs to be provided on the connector, so as to ensure the structural strength of the connector and thus ensure the connection stability between the connector and the differential pressure sensor; at the same time, it can also increase the support length of the support member on the cantilever section, so as to further increase the stability of the cantilever section and further ensure the service life of the differential pressure sensor.

[0033] 3. The thickness T of the support member and the width W of the cantilever section in this application satisfy the following condition: 1 / 10W≤T≤1 / 4W. This ensures the structural strength of the support member and its support effect on the cantilever section. It also reduces the width of the clearance notch on the connector to ensure the structural strength of the connector and thus the connection stability between the connector and the differential pressure sensor. Attached Figure Description

[0034] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0035] Figure 1 This is a schematic diagram of the differential pressure sensor described in Embodiment 1 of this application;

[0036] Figure 2 This is a schematic diagram of the differential pressure sensor described in Embodiment 1 of this application from another perspective;

[0037] Figure 3 This is another perspective structural schematic diagram of the differential pressure sensor described in Embodiment 1 of this application;

[0038] Figure 4 This is a schematic diagram of the differential pressure sensor described in Embodiment 2 of this application;

[0039] Figure 5 for Figure 4 Enlarged view of part A in the middle;

[0040] Figure 6 This is a schematic diagram of the differential pressure sensor described in Embodiment 2 of this application from another perspective;

[0041] Figure 7 for Figure 6 Enlarged view of part B in the middle;

[0042] Figure 8 This is a schematic diagram of the differential pressure sensor described in Embodiment 3 of this application;

[0043] Figure 9 This is a schematic diagram of the differential pressure sensor described in Embodiment 3 of this application from another perspective;

[0044] Figure 10 This is a schematic diagram of the differential pressure sensor body described in Embodiment 3 of this application;

[0045] Figure 11 This is a structural schematic diagram of the support member described in Embodiment 3 of this application.

[0046] Figure label:

[0047] 1. Differential pressure sensor body; 11. Receiving groove; 12. Elastic arm; 2. L-shaped cantilever; 21. Connecting section; 22. Cantilever section; 221. Interface; 3. Supporting component; 31. Connecting part; 311. Snap-fit ​​hole; 32. Support part; 321. Snap-fit ​​arm. Detailed Implementation

[0048] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0049] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0050] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, 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, and therefore should not be construed as a limitation of this application.

[0051] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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, an electrical connection, or a communication 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 application according to the specific circumstances.

[0052] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0053] Reference Figures 1 to 11 A differential pressure sensor for a Venturi flow meter assembly is disclosed, comprising a differential pressure sensor body 1, an L-shaped cantilever 2, and a support member 3. The L-shaped cantilever 2 has a connecting section 21 and a cantilever section 22. The connecting section 21 is connected to the differential pressure sensor body 1. The end of the cantilever section 22 away from the connecting section 21 has an interface 221 for connecting a connector. The support member 3 is disposed between the cantilever section 22 and the differential pressure sensor body 1 and is used to support the cantilever section 22.

[0054] It is understood that the connecting section 21 and the cantilever section 22 are integrally formed, and the connecting section 21 and the cantilever section 22 form a 90° angle. The connecting section 21 and the differential pressure sensor body 1 are integrally formed.

[0055] Since the differential pressure sensor in the application has a support member 3 located between the cantilever section 22 and the differential pressure sensor body 1, the cantilever section 22 can be supported by the support member 3 to prevent the cantilever section 22 from moving towards the differential pressure sensor body 1 under pressure. This increases the stability of the cantilever section 22 and prevents the connection between the cantilever section 22 and the connecting section 21 from breaking easily. This ensures the lifespan of the differential pressure sensor and improves the user experience.

[0056] Furthermore, since a support member 3 is provided between the cantilever section 22 and the differential pressure sensor body 1, a clearance notch is required on the connector for connecting to the differential pressure sensor to accommodate the support member 3, so that the connector can be fitted onto the outside of the cantilever section 22 and connected to the interface 221. Through the cooperation of the clearance notch and the support member 3, the connector can also be positioned, thereby increasing the connection stability between the connector and the differential pressure sensor.

[0057] This application does not specifically limit the structure of the supporting member 3; preferably, refer to... Figures 1 to 11 The support member 3 is a plate-like structure to ensure the effective support of the support member 3 for the cantilever section 22 while reducing the manufacturing cost of the differential pressure sensor. In other embodiments, the support member 3 can also be a block-like structure, a column-like structure, or other structures capable of supporting the cantilever section 22.

[0058] This application does not specifically limit the extension direction of the support member 3. Preferably, the support member 3 extends along the length direction of the cantilever segment 22.

[0059] It should be noted that the cantilever section 22 has a connection surface facing the differential pressure sensor body 1, and the aforementioned support member 3 extending along the length direction of the cantilever section 22 means that the plane where the support member 3 is located extends along the length direction of the cantilever section 22.

[0060] Since the support member 3 extends along the length of the cantilever section 22, the area of ​​the clearance notch that needs to be provided on the connector is reduced, so as to ensure the structural strength of the connector and thus ensure the connection stability between the connector and the differential pressure sensor. At the same time, it can also increase the support length of the support member 3 on the cantilever section 22, so as to further increase the stability of the cantilever section 22 and further ensure the life of the differential pressure sensor.

[0061] In other embodiments, the extension direction of the support member 3 may be perpendicular to the length direction of the cantilever segment 22 or at an angle to the length direction of the cantilever segment 22.

[0062] This application does not specifically limit the relationship between the thickness of the supporting member 3 and the width of the cantilever section 22. Preferably, refer to... Figure 3 The thickness T of the supporting member 3 and the width W of the cantilever section 22 satisfy: 1 / 10W≤T≤1 / 4W.

[0063] Since the thickness T of the support member 3 and the width W of the cantilever section 22 satisfy: 1 / 10W≤T≤1 / 4W, the structural strength of the support member 3 is guaranteed on the one hand, so as to ensure the support effect of the support member 3 on the cantilever section 22. On the other hand, the width of the clearance notch on the connector can be reduced to ensure the structural strength of the connector, thereby ensuring the connection stability between the connector and the differential pressure sensor.

[0064] In other embodiments, the thickness T of the support member 3 may also be proportional to the width W of the cantilever segment 22 in other proportions.

[0065] This application does not specify the positional relationship between the support member 3, the cantilever section 22, and the differential pressure sensor body 1. Refer to... Figure 3 , Figure 4 and Figure 8 Preferably, the cantilever segment 22 has a connecting surface facing the differential pressure sensor body 1, the differential pressure sensor body 1 has a supporting surface facing the cantilever segment 22, and the supporting member 3 is arranged perpendicular to the connecting surface and the supporting surface.

[0066] It is understandable that the connecting surface and the supporting surface are set parallel to each other, and the supporting member 3 is set at a 90° angle to both the connecting surface and the supporting surface.

[0067] It should be noted that the above-mentioned setting of the support member 3 perpendicular to the connection surface and the support surface means that the plane on which the support member 3 is located is perpendicular to the connection surface and the support surface.

[0068] Since the support member 3 is set perpendicular to the connecting surface and the support surface, the support effect of the support member 3 on the cantilever section 22 is further increased, thereby further ensuring the service life of the differential pressure sensor; in addition, it can also reduce the manufacturing difficulty of the differential pressure sensor, so as to reduce the production cost of the differential pressure sensor.

[0069] Preferably, the support member 3 is located at the middle position in the width direction of the cantilever segment 22 to ensure the support effect of the support member 3 on the cantilever segment 22.

[0070] Of course, in other embodiments, the support member 3 may also be set at other angles with the support surface and the connecting surface.

[0071] This application does not specifically limit the connection relationship between the support member 3, the cantilever section 22, and the differential pressure sensor; it can adopt any of the following embodiments:

[0072] Implementation Method 1, in this implementation method, refer to Figures 1 to 3 The support member 3 has a first end and a second end opposite to the first end. The first end is fixedly connected to the cantilever section 22, and the second end is fixedly connected to the differential pressure sensor body 1.

[0073] Since the first end of the support member 3 is fixedly connected to the cantilever section 22 and the second end of the support member 3 is fixedly connected to the differential pressure sensor body 1, the support member 3 can be integrally formed with the cantilever section 22 and the differential pressure sensor body 1, thereby increasing the connection stability between the support member 3, the cantilever section 22 and the differential pressure sensor body 1, and also reducing the number of parts required for assembly during the production of the differential pressure sensor, thereby improving the production efficiency of the differential pressure sensor.

[0074] Furthermore, since the first end of the support member 3 is fixedly connected to the cantilever section 22 and the second end of the support member 3 is fixedly connected to the differential pressure sensor body 1, when the cantilever section 22 is subjected to a tensile force away from the differential pressure sensor body 1, the support member 3 can also apply a tensile force towards the differential pressure sensor body 1 to the cantilever section 22, so as to avoid the cantilever section 22 moving away from the differential pressure sensor body 1 and causing the connection between the cantilever section 22 and the connecting section 21 to break, thereby further ensuring the life of the differential pressure sensor.

[0075] In this embodiment, the relationship between the supporting member 3 and the connecting section 21, as well as the end of the cantilever section 22 away from the connecting section 21, is not specifically limited, and can be any of the following embodiments:

[0076] In Example 1, there is a gap between the support member 3 and the connecting section 21. While ensuring the support effect of the support member 3 on the cantilever section 22, the area of ​​the support member 3 is reduced, thereby reducing the amount of raw materials required for the support member 3 and thus reducing the manufacturing cost of the differential pressure sensor.

[0077] It is understood that the support member 3 has a first side facing the connecting section 21 and a second side opposite to the first side, with the first side spaced apart from the connecting section 21.

[0078] In this embodiment, preferably, the second side of the support member 3 is recessed at the end of the cantilever section 22 away from the connecting section 21. This reduces the amount of raw materials required for manufacturing the support member 3, thereby lowering the manufacturing cost of the differential pressure sensor. It also reduces the length of the clearance notch required on the connector, ensuring the structural strength of the connector and the stability of the connection between the connector and the differential pressure sensor. In other embodiments, the second side of the support member 3 may also be flush with the end of the cantilever section 22 away from the connecting section 21.

[0079] Example 2, in this example, refer to Figures 1 to 3 The support member 3 has a first side and a second side opposite to the first side. The first side is fixedly connected to the connecting section 21, and the second side is flush with the end of the cantilever section 22 away from the connecting section 21.

[0080] Since the first side of the support member 3 is fixedly connected to the connecting section 21, the support member 3 can also increase the connection strength between the connecting section 21 and the differential pressure sensor body 1, thereby increasing the stability of the connecting section 21. This prevents the connecting section 21 from easily breaking at the connection point with the differential pressure sensor body 1 due to stress, and further ensures the lifespan of the differential pressure sensor. Furthermore, since the second side of the support member 3 is flush with the end of the cantilever section 22 away from the connecting section 21, it can ensure the insertion depth of the connector and the cantilever section 22, thus ensuring the connection stability between the connector and the cantilever section 22.

[0081] Implementation Method Two: In this implementation method, refer to... Figure 4 and Figure 5 The cantilever section 22 has a connecting surface facing the differential pressure sensor body 1, and the differential pressure sensor body 1 has a supporting surface facing the cantilever section 22. Both the connecting surface and the supporting surface are provided with receiving grooves 11, and the two ends of the supporting member 3 extend into the two receiving grooves 11 respectively.

[0082] It is understood that both the connecting surface and the supporting surface are provided with receiving grooves 11, and the opening of the receiving groove 11 on the connecting surface is opposite to the opening of the receiving groove 11 on the supporting surface.

[0083] Since the two ends of the support member 3 extend into the two receiving grooves 11 respectively, the support member 3, the cantilever section 22 and the differential pressure sensor body 1 can be formed and set separately, thereby reducing the manufacturing difficulty of the differential pressure sensor and improving the yield of the differential pressure sensor.

[0084] This application does not specifically limit the structure of the receiving groove 11; preferably, refer to... Figure 5 The width D1 at the opening of the receiving groove 11 and the width D2 at the bottom of the receiving groove 11 satisfy: D1≤D2, and the end of the supporting member 3 is adapted to the shape of the receiving groove 11.

[0085] Since the width at the opening of the receiving groove 11 is smaller than the width at the bottom of the receiving groove 11, and the end of the supporting member 3 is adapted to the shape of the receiving groove 11, the connection stability between the supporting member 3 and the receiving groove 11 is increased. This allows the supporting member 3 to not only support the cantilever section 22, but also, under the cooperation of its end and the receiving groove 11, apply a tensile force towards the direction of the differential pressure sensor to the cantilever section 22 when it is subjected to a tensile force in the direction away from the differential pressure sensor. This further increases the stability of the cantilever section 22 and thus further ensures the service life of the differential pressure sensor.

[0086] This application does not specifically limit the shape of the receiving groove 11; preferably, refer to... Figure 5 The receiving groove 11 has a T-shaped cross-section, and the end of the supporting member 3 is also T-shaped, so that the end of the supporting member 3 can be adapted to the receiving groove 11, thereby increasing the connection stability between the supporting member 3 and the receiving groove 11. In other embodiments, the receiving groove 11 can also be a structure with an isosceles trapezoid or a right trapezoid in cross-section.

[0087] This application does not specifically limit the formation method of the receiving groove 11. Preferably, the receiving groove 11 provided in the differential pressure sensor body 1 is formed by a rib structure provided in the differential pressure sensor body 1, and the receiving groove 11 provided in the cantilever section 22 is formed by a rib structure provided in the cantilever section 22. In other embodiments, the receiving groove 11 provided in the differential pressure sensor body 1 may also be formed by removing glue from the differential pressure sensor body 1, and the receiving groove 11 provided in the cantilever section 22 may also be formed by removing glue from the cantilever section 22.

[0088] Furthermore, the receiving groove 11 has a through-hole on the side opposite to the connecting section 21, so that the end of the support member 3 can be inserted into the receiving groove 11 through the through-hole in the direction close to the connecting section 21, so as to facilitate the installation of the support member 3.

[0089] Furthermore, refer to Figure 4 , Figure 6 and Figure 7 The differential pressure sensor body 1 is provided with an elastic arm 12 located at the through port. One end of the elastic arm 12 is fixedly connected to the differential pressure sensor body 1, and the other end of the elastic arm 12 is inclined towards the position of the connecting section 21 in the direction close to the cantilever section 22. After the support member 3 is installed in place, the end of the elastic arm 12 away from the differential pressure sensor body 1 abuts against the support member 3, so as to limit the support member 3 by using the elastic arm 12, thereby preventing the support member 3 from coming out of the receiving groove 11, and thus increasing the stability of the support member 3.

[0090] This application does not specifically limit the structure of the elastic arm 12. Preferably, the elastic arm 12 is a thin-walled structure made of a metallic material, such as copper, iron, or other alloys, so that the elastic arm 12 can swing around the connection position between the elastic arm 12 and the differential pressure sensor body 1. This allows the elastic arm 12 to avoid contact with the support member 3 during installation, reducing the difficulty of installing the support member 3. In other embodiments, the elastic arm 12 can also be a thin-walled structure made of plastic, rubber, or other materials.

[0091] Implementation Method 3: In this implementation method, refer to... Figures 8 to 11 The support member 3 includes a connecting part 31 and a support part 32 that is snapped into the connecting part 31. The connecting part 31 is located on the cantilever section 22 and the differential pressure sensor body 1.

[0092] It is understood that multiple connecting parts 31 are provided, with some connecting parts 31 fixedly connected to the side of the differential pressure sensor body 1 facing the cantilever section 22, and the remaining connecting parts 31 fixedly connected to the side of the cantilever section 22 facing the differential pressure sensor body 1.

[0093] Since the connecting part 31 is provided on the cantilever section 22 and the differential pressure sensor body 1, and the support part 32 is snapped into the connecting part 31, the support part 32 can be separately set from the cantilever section 22 and the differential pressure sensor body 1, thereby reducing the production difficulty of the differential pressure sensor and improving the yield of the differential pressure sensor.

[0094] This application does not specifically limit the structure of the connecting part 31 and the supporting part 32. Preferably, the connecting part 31 is a block structure and the supporting part 32 is a plate structure to ensure the supporting effect on the cantilever section 22.

[0095] This application does not specify the snap-fit ​​method between the support part 32 and the connecting part 31. Preferably, refer to Figures 8 to 11 The connecting part 31 is provided with a snap-fit ​​hole 311, and the supporting part 32 is provided with a snap-fit ​​arm 321 that snaps into the snap-fit ​​hole 311.

[0096] When assembling the differential pressure sensor, first align the snap-fit ​​arm 321 on the support 32 with the snap-fit ​​hole 311, and then push the support 32 toward the direction of the connecting part 31 so that the support 32 moves toward the direction of the connecting part 31. Finally, the snap-fit ​​arm 321 and the snap-fit ​​hole 311 are snapped together to complete the assembly of the differential pressure sensor. In this process, only the support 32 needs to be pushed, which reduces the difficulty of assembling the differential pressure sensor.

[0097] Specifically, the snap-fit ​​arm 321 is deformable and has a protrusion on its side. The snap-fit ​​hole 311 is a stepped hole. After the snap-fit ​​arm 321 and the snap-fit ​​hole 311 are snapped together, the protrusion is located in the larger diameter hole of the snap-fit ​​hole 311, and the protrusion stops at the end face of the connection between the larger diameter hole and the smaller diameter hole of the snap-fit ​​hole 311, so as to realize the snap-fit ​​between the snap-fit ​​arm 321 and the snap-fit ​​hole 311 and to hide the protrusion. Multiple snap-fit ​​arms 321 are arranged at intervals along the circumference of the snap-fit ​​hole 311 to increase the number of snap-fit ​​points between the support part 32 and the connecting part 31, thereby increasing the connection stability between the support part 32 and the connecting part 31.

[0098] In other embodiments, the support portion 32 may also engage with the connecting portion 31 in other ways, such as by using a separate snap-fit ​​to achieve the engagement between the two.

[0099] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0100] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0101] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A differential pressure sensor for a Venturi flowmeter assembly, characterized in that, The device includes a differential pressure sensor body (1), an L-shaped cantilever (2), and a support member (3). The L-shaped cantilever (2) has a connecting section (21) and a cantilever section (22). The connecting section (21) is connected to the differential pressure sensor body (1). The end of the cantilever section (22) away from the connecting section (21) has an interface (221) for connecting a connector. The support member (3) is located between the cantilever section (22) and the differential pressure sensor body (1) and is used to support the cantilever section (22).

2. The differential pressure sensor for a Venturi flowmeter assembly according to claim 1, characterized in that, The support member (3) extends along the length of the cantilever segment (22).

3. A differential pressure sensor for a Venturi flowmeter assembly according to claim 1, characterized in that, The thickness T of the support member (3) and the width W of the cantilever segment (22) satisfy: 1 / 10W≤T≤1 / 4W.

4. A differential pressure sensor for a Venturi flowmeter assembly according to claim 1, characterized in that, The cantilever section (22) has a connecting surface facing the differential pressure sensor body (1), the differential pressure sensor body (1) has a supporting surface facing the cantilever section (22), and the supporting member (3) is arranged perpendicular to the connecting surface and the supporting surface.

5. A differential pressure sensor for a Venturi flowmeter assembly according to any one of claims 1-4, characterized in that, The support member (3) has a first end and a second end opposite to the first end. The first end is fixedly connected to the cantilever section (22), and the second end is fixedly connected to the differential pressure sensor body (1).

6. A differential pressure sensor for a Venturi flowmeter assembly according to claim 5, characterized in that, There is a gap between the supporting member (3) and the connecting section (21); Alternatively, the support member (3) has a first side and a second side opposite to the first side, the first side being fixedly connected to the connecting segment (21), and the second side being flush with the end of the cantilever segment (22) away from the connecting segment (21).

7. A differential pressure sensor for a Venturi flowmeter assembly according to any one of claims 1-4, characterized in that, The cantilever section (22) has a connecting surface facing the differential pressure sensor body (1), and the differential pressure sensor body (1) has a supporting surface facing the cantilever section (22). The connecting surface and the supporting surface are respectively provided with receiving grooves (11), and the two ends of the supporting member (3) extend into the two receiving grooves (11).

8. A differential pressure sensor for a Venturi flowmeter assembly according to claim 7, characterized in that, The width D1 at the opening of the accommodating groove (11) and the width D2 at the bottom of the accommodating groove (11) satisfy: D1≤D2, and the end of the supporting member (3) is adapted to the shape of the accommodating groove (11).

9. A differential pressure sensor for a Venturi flowmeter assembly according to any one of claims 1-4, characterized in that, The support member (3) includes a connecting part (31) and a support part (32) snapped into the connecting part (31). The connecting part (31) is located on the cantilever section (22) and the differential pressure sensor body (1).

10. A differential pressure sensor for a Venturi flowmeter assembly according to claim 9, characterized in that, The connecting part (31) is provided with a snap-fit ​​hole (311), and the supporting part (32) is provided with a snap-fit ​​arm (321) that snaps into the snap-fit ​​hole (311).

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