A sensor body of a flow-through pressure sensor

Abstract

The utility model relates to the technical field of flow pressure sensor, concretely relates to a sensor main body of flow pressure sensor, including the center through -hole of opening in sensor main body and respectively located the outer thread of sensor main body both ends, sensor main body is provided with strain gauge pasting groove along its radial direction, the center through -hole and outer thread all with sensor main body coaxial arrangement, the bottom surface of strain gauge pasting groove is close to center through -hole and is located the outside of center through -hole, through the center through -hole design is straight through -hole to reduce the structural complexity inside sensor main body, reduce processing difficulty, improve processing efficiency, also convenient for internal sundries cleaning, the outer thread is set up simultaneously in its outside, further reduce internal processing difficulty, and can avoid the burr of inside production, reduce the influence to internal liquid flow, guarantee its measurement more accurate and reliable, satisfy actual use demand.

Description

Technical Field

[0001] This utility model relates to the field of flow pressure sensor technology, specifically to a sensor body for a flow pressure sensor. Background Technology

[0002] Flow pressure sensors are used in petroleum, chemical, food, medical, and industrial fields to measure hydraulic pressure within liquids, such as in high-performance liquid chromatography (HPLC) and ultra-high-pressure liquid chromatography (UPLC), which require stable high-pressure system flow within the operating pressure range. Flow pressure sensors can be used to obtain pressure values ​​at multiple locations within a system to verify appropriate pressure and accurately maintain a specified system pressure.

[0003] For example, Chinese utility model patent CN106248290A discloses a sensor body for a flow pressure sensor, which is connected to a fluid conduit through an outlet port and an inlet port. Typically, the outlet and inlet ports have internal threads for easy external connection, and the inner diameter of the central hole is smaller than that of the outlet / inlet port, thus requiring the machining of an excessively tapered hole. Due to its complex internal structure and numerous processes, it is difficult to clean the debris generated during production, and burrs may exist in the internal thread machining. This leads to significant errors in measurement results during use, affecting measurement accuracy. To improve machining accuracy, additional processing steps are usually required, increasing costs and failing to meet practical application requirements. Utility Model Content

[0004] The purpose of this invention is to provide a sensor body for a flow pressure sensor, thereby solving the technical problem of poor processing results caused by the structure of the flow pressure sensor.

[0005] The solution of this utility model to the above-mentioned technical problems is as follows: A flow pressure sensor body includes a central through hole and external threads located at both ends of the sensor body, and a strain gauge mounting groove is provided on the sensor body along its radial direction. Both the central through hole and the external thread are coaxially arranged with the sensor body, and the bottom surface of the strain gauge adhesive groove is close to the central through hole and located outside the central through hole.

[0006] Further specifying, the external threads are respectively provided on the external sections at both ends of the sensor body, the strain gauge adhesive groove is opened in the measuring section of the sensor body, and the measuring section is located between the two external sections.

[0007] Further defined, the external section includes a conical section and a threaded section, wherein the threaded section is located between the flared end of the conical section and the corresponding end face of the measuring section; The port of the central through hole is flush with the narrow opening of the cone-shaped section.

[0008] Furthermore, the strain gauge mounting groove is an arc or rectangle close to the axis of the central through hole.

[0009] Furthermore, a transition groove is provided on the measuring section. The transition groove is arranged in the same direction as the strain gauge bonding groove, and the transition groove is located on the periphery of the strain gauge bonding groove. The depth of the transition groove is less than the depth of the strain gauge bonding groove.

[0010] Furthermore, the measuring section is provided with a fixing groove, which is perpendicular to the axis of the central through hole and is located on opposite sides of the strain gauge bonding groove.

[0011] Furthermore, the fixing groove is either a circular arc groove or a square groove.

[0012] Furthermore, the number of the fixing grooves is two, and the two fixing grooves are symmetrically arranged around the vertical axis of the strain gauge bonding groove.

[0013] Furthermore, the number of the fixing grooves is four, and the four fixing grooves are symmetrically arranged about the axis of the strain gauge bonding groove.

[0014] Furthermore, the sensor body is defined as having the shape of a cylinder, square prism, prismatic prism, or flat cylinder.

[0015] The beneficial effects of this utility model are as follows: This invention reduces the structural complexity of the sensor body by designing the central through hole as a straight through hole, thereby reducing the processing difficulty, improving processing efficiency, and facilitating the cleaning of internal debris. At the same time, external threads are opened on its outer side to further reduce the internal processing difficulty and avoid the generation of burrs inside, reducing the impact on the internal liquid flow, thus ensuring that its measurement is more accurate and reliable, and meeting the actual use requirements. Attached Figure Description

[0016] Figure 1 This is a front view of the sensor body of this utility model; Figure 2 This is a top view of the sensor body of this utility model; Figure 3 This is an isometric view of the sensor body of this utility model; Figure 4 This is a cross-sectional view of the main body of the sensor of this utility model.

[0017] In the figure, 1-conical section; 2-external thread; 3-transition groove; 4-strain gauge mounting groove; 5-fixing groove; 6-central through hole; 7-sensor body. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model 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 on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Example 1 refer to Figures 1-4 This utility model provides a sensor body for a flow pressure sensor, wherein the sensor body 7 is used for the flow pressure sensor. The sensor body 7 can be a rod-shaped or columnar structure. A central through hole 6 is provided on the sensor body 7. The central through hole 6 is coaxially arranged with the sensor body 7. The central through hole 6 is cylindrical to avoid internal diameter variation design, which increases the processing difficulty and improves the processing quality. At the same time, in order to facilitate connection with external fluid pipelines, an external thread 2 is provided on the outside of the sensor body 7 for connection, which meets the usage requirements.

[0023] Meanwhile, in order to facilitate connection with fluid pipelines, the outer diameters on both sides of the sensor body 7 need to match the inner diameter of the fluid pipeline, thus reducing the size and material usage of the sensor body 7, which can adapt to narrow installation environments and reduce costs.

[0024] During use, the strain gauge is attached to the strain gauge mounting groove 4, which is perpendicular to the axis of the sensor body 7. The bottom surface of the strain gauge mounting groove 4 is close to the central through hole 6 and the strain gauge mounting groove 4 is located on the periphery of the central through hole 6, so that the strain gauge can sense the deformation caused by the fluid pressure in the central through hole 6, thereby causing the strain gauge resistance to change. The current fluid pressure is determined by the signal output by the Wheatstone bridge circuit. The strain gauge is a foil strain gauge.

[0025] To further explain, the external thread 2 is set on the outer section of the sensor body 7, and the strain gauge adhesive groove 4 is opened on the measuring section of the sensor body 7, with the measuring section located between the two outer sections.

[0026] The outer diameter of the outer section is relatively small in order to facilitate threaded connection with the inner wall of the fluid pipe; the outer diameter of the measuring section is larger than that of the outer section in order to improve its structural strength.

[0027] Specifically, the external section includes a conical section 1 and a threaded section. The threaded section is located between the flared end of the conical section 1 and the corresponding end face of the measuring section. By setting the conical section 1, the narrow opening of the conical section 1 faces outward, which facilitates docking and insertion with the liquid pipe and makes connection convenient. At this time, the port of the central through hole 6 is flush with the narrow opening of the conical section 1.

[0028] The strain gauge mounting groove 4 can be either arc-shaped or rectangular, which facilitates processing while ensuring stable mounting of the strain gauge and meeting measurement requirements.

[0029] Optionally, a transition groove 3 is also provided on the measuring section. The depth of the transition groove 3 is set in the same direction as the depth of the strain gauge bonding groove 4. The transition groove 3 is located on the periphery of the strain gauge bonding groove 4. The depth of the transition groove 3 is less than the depth of the strain gauge bonding groove 4. The length direction of the transition groove 3 is opened along the axis of the central through hole 6, thereby forming a stepped groove.

[0030] To further explain, in order to prevent the sensor body 7 from rotating around its axis during use, causing the connection to become loose or rotating perpendicular to its axis, a fixing groove 5 is usually opened on the measuring section.

[0031] The fixing groove 5 is opened perpendicular to the axis of the central through hole 6, and the fixing groove 5 is located on both sides of the strain gauge bonding groove 4.

[0032] The number of fixing slots 5 can be two or four. When there are two fixing slots 5, the two fixing slots 5 are symmetrically arranged around the vertical axis of the strain gauge bonding slot 4. If there are four fixing slots 5, the four fixing slots 5 are arranged in an array around the periphery of the strain gauge bonding slot 4. For example, fixing slots 5 are opened on both sides of the transition slot 3 to ensure that the connection of the sensor body 7 is stable and reliable.

[0033] The fixing groove 5 can be either a circular arc groove or a square groove.

[0034] The sensor body 7 is made of materials such as plastic, aluminum alloy, beryllium bronze, high-quality carbon steel, alloy steel, titanium, titanium alloy, stainless steel or stainless steel alloy; the sensor body 7 can be cylindrical, square, prismatic or flat cylindrical, etc.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of this utility model and should not be used to limit the scope of protection of this utility model. Any modifications made to the technical solutions based on the technical concept proposed by this utility model shall fall within the scope of protection of the claims of this utility model.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sensor body for a flow pressure sensor, characterized in that, Includes a central through hole (6) on the sensor body (7) and external threads (2) located at both ends of the sensor body (7), and a strain gauge mounting groove (4) is provided on the sensor body (7) along its radial direction; The central through hole (6) and the external thread (2) are both coaxially arranged with the sensor body (7), and the bottom surface of the strain gauge adhesive groove (4) is close to the central through hole (6) and located outside the central through hole (6).

2. The sensor body of the flow pressure sensor according to claim 1, characterized in that, The external threads (2) are respectively set on the external sections at both ends of the sensor body (7), and the strain gauge adhesive groove (4) is opened on the measuring section of the sensor body (7), and the measuring section is located between the two external sections.

3. The sensor body of the flow pressure sensor according to claim 2, characterized in that, The external section includes a conical section (1) and a threaded section, wherein the threaded section is located between the flared end of the conical section (1) and the corresponding end face of the measuring section; The port of the central through hole (6) is flush with the narrow opening of the cone section (1).

4. The sensor body of the flow pressure sensor according to claim 3, characterized in that, The strain gauge mounting groove (4) is an arc or rectangle close to the axis of the central through hole (6).

5. The sensor body of the flow pressure sensor according to claim 4, characterized in that, The measuring section is also provided with a transition groove (3), which is arranged in the same direction as the strain gauge adhesive groove (4). The transition groove (3) is located on the periphery of the strain gauge adhesive groove (4), and the depth of the transition groove (3) is less than the depth of the strain gauge adhesive groove (4).

6. The sensor body of the flow pressure sensor according to claim 5, characterized in that, The measuring section is also provided with a fixing groove (5), which is opened perpendicular to the axis of the central through hole (6) and is located on opposite sides of the strain gauge adhesive groove (4).

7. The sensor body of the flow pressure sensor according to claim 6, characterized in that, The fixing groove (5) is a circular arc groove or a square groove.

8. The sensor body of the flow pressure sensor according to claim 6, characterized in that, The number of the fixing grooves (5) is two, and the two fixing grooves (5) are symmetrically arranged around the vertical axis of the strain gauge adhesive groove (4).

9. The sensor body of the flow pressure sensor according to claim 8, characterized in that, The number of the fixing grooves (5) is four, and the four fixing grooves (5) are symmetrically arranged about the axis of the strain gauge adhesive groove (4).

10. The sensor body of the flow pressure sensor according to claim 1, characterized in that, The sensor body (7) is cylindrical, square, prismatic, or flat.

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