A corrosion-proof oil cup for a pressure sensor

Abstract

The utility model discloses a kind of anticorrosion oil cups of pressure sensor, including cup body, the cup body whole is made of polytetrafluoroethylene material, the bottom of the cup body is provided with protruding part, and located the top of the cup body is provided with oil storage groove, to realize the storage of internal silicone oil, the inner wall circumferential direction of the oil storage groove is equidistantly arranged with multiple ribs, to divide the silicone oil flow space in oil storage groove, inhibit vortex generation, the bottom of the cup body is close to the edge and is provided with sealing structure, to ensure the extrusion sealing between cup body and pressure sensor shell.The utility model is made of polytetrafluoroethylene material cup body, combined with the sealing ring of fluorine rubber material, significantly improve the anticorrosive performance of oil cup whole, can effectively resist the erosion of various corrosive media, avoid cup body aging breakage and medium leakage, prolong the service life of pressure sensor.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor application technology, and in particular to a corrosion-resistant oil cup for a pressure sensor. Background Technology

[0002] In the working system of a pressure sensor, the oil cup is one of the core auxiliary components. Its main function is to store silicone oil used to transmit pressure, thereby isolating the sensor's internal core from the external detection medium and preventing the core from being damaged by direct contact with the medium. At the same time, the stable flow of silicone oil ensures the accurate transmission of pressure signals. It is widely used in working conditions with corrosive media, such as chemical, petroleum, and pharmaceutical industries.

[0003] Existing pressure sensor oil cups have several shortcomings in practical applications: Firstly, most oil cups are made of ordinary metal or plastic, which have poor corrosion resistance. Long-term contact with corrosive media can easily lead to material aging and damage, resulting in media leakage. This not only affects the pressure transmission effect of the silicone oil but also corrodes the internal core of the sensor, shortening its service life. Secondly, the oil cup's oil storage structure is simply designed. When the silicone oil is affected by external factors such as vibration and pressure fluctuations, eddies are easily generated in the oil storage space. These eddies interfere with the stable transmission of pressure signals, leading to a decrease in sensor detection accuracy. Therefore, this invention proposes a corrosion-resistant oil cup for pressure sensors. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a corrosion-resistant oil cup for a pressure sensor, so as to improve the corrosion resistance of the oil cup, suppress silicone oil eddy currents and enhance the sealing effect, thereby ensuring the detection accuracy and service life of the pressure sensor.

[0005] To solve the above technical problems, the present invention provides a corrosion-resistant oil cup for a pressure sensor, including a cup body made entirely of polytetrafluoroethylene. The bottom of the cup body is provided with a protrusion, and an oil storage tank is provided at the top of the cup body to store silicone oil inside. The inner wall of the oil storage tank has multiple ribs arranged at equal intervals in the circumferential direction to divide the silicone oil flow space in the oil storage tank and suppress the generation of eddies. A sealing structure is provided at the bottom of the cup near the edge to ensure a compression seal between the cup and the pressure sensor housing.

[0006] The present invention is further configured such that: the protrusion is arc-shaped near the edge of the cup body, and the inner bottom edge of the oil storage tank is provided with an arc-shaped surface that matches the arc-shaped surface of the protrusion.

[0007] Through the above technical solution, the arc-shaped protrusion is matched with the edge of the cup and the arc-shaped surface at the bottom of the oil storage tank. On the one hand, it can reduce the resistance of silicone oil when it flows at the bottom of the oil storage tank and avoid the flow obstruction caused by local silicone oil accumulation. On the other hand, it can disperse the pressure on the bottom of the cup and prevent the cup from deforming due to stress concentration. At the same time, the arc-shaped structure can reduce the probability of corrosive media residue at the corners and further improve the anti-corrosion effect.

[0008] The present invention is further configured such that: the plurality of ribs are arranged along the axial direction of the cup body, and their bottom ends are smoothly transitioned to the inner bottom of the oil storage tank, and their top ends are arc-shaped transitioned to the top opening of the oil storage tank.

[0009] Through the above technical solution, the ribs arranged along the axial direction can divide the silicone oil flow space in the oil storage tank into multiple independent fan-shaped areas. When the sensor is subjected to vibration or pressure changes that cause silicone oil to flow, the ribs can block the circumferential movement of the silicone oil, thereby effectively suppressing the generation of eddies, avoiding interference of eddies on pressure transmission, and ensuring detection accuracy. At the same time, the smooth transition and arc transition structure at both ends of the ribs can eliminate dead angles in the flow, reduce the retention of silicone oil at the connection between the ribs and the oil storage tank, reduce the aging rate of silicone oil, and facilitate cleaning and maintenance.

[0010] The present invention is further configured such that: the outer arc wall of the cup body is provided with a positioning groove that is adapted to the built-in core of the pressure sensor, and the positioning groove is set in a semi-circular arc shape.

[0011] Through the above technical solution, the semi-circular positioning groove is adapted to the built-in core of the pressure sensor, which can realize the precise positioning of the cup inside the sensor, prevent the cup from shifting during installation or use, ensure the relative position of the oil reservoir and the core is stable, and ensure that the silicone oil can uniformly transmit pressure to the core. At the same time, the arc-shaped structure of the positioning groove can increase the contact area between the cup and the core, disperse the local pressure of the core on the cup, avoid damage to the cup due to excessive local force, and facilitate quick alignment during installation, thus improving assembly efficiency.

[0012] The present invention is further configured such that: the sealing structure includes a sealing groove opened at the bottom of the cup body near the outer arc wall, and a sealing ring is engaged inside the sealing groove.

[0013] Through the above technical solutions, the sealing groove provides a stable installation space for the sealing ring, which can prevent the sealing ring from shifting or falling off during the compression sealing process and ensure the accuracy of the sealing position; the snap-fit ​​connection method facilitates the replacement and maintenance of the sealing ring. When the sealing ring ages or is damaged, it can be quickly disassembled and replaced, reducing maintenance costs; at the same time, the structural design of the sealing groove can increase the contact area between the sealing ring and the cup body, improve the installation stability of the sealing ring, and ensure the durability of the sealing effect.

[0014] The present invention is further configured such that the sealing ring is made of fluororubber.

[0015] Through the above technical solutions, fluororubber material has excellent corrosion resistance, high temperature resistance and aging resistance, and can resist the erosion of various corrosive media, adapting to the complex working environment that pressure sensors may face; at the same time, fluororubber has good elastic recovery performance, and can still maintain good sealing performance under long-term compression, avoiding media leakage caused by the aging and failure of the sealing ring, extending the service life of the sealing structure, and further ensuring the overall reliability of the pressure sensor.

[0016] The present invention is further configured such that the height of the sealing ring exceeds the depth of the sealing groove.

[0017] With the above technical solution, the height of the sealing ring exceeds the depth of the sealing groove. When the cup body and the pressure sensor housing are installed and squeezed, the sealing ring will be squeezed by the housing and undergo elastic deformation. The deformed sealing ring can fully fill the gap between the cup body and the housing, forming an interference seal. This effectively prevents external corrosive media from entering the sensor and prevents silicone oil leakage in the oil reservoir, ensuring the reliability of the seal and avoiding the impact on the sensor's detection accuracy and service life due to incomplete sealing.

[0018] The beneficial effects of this utility model are as follows: 1. The corrosion-resistant oil cup for a pressure sensor proposed in this utility model uses polytetrafluoroethylene (PTFE) material to make the cup body and combines it with a fluororubber sealing ring, which significantly improves the overall corrosion resistance of the oil cup. It can effectively resist the erosion of various corrosive media, avoid aging and damage of the cup body and leakage of media, and extend the service life of the pressure sensor. At the same time, the interference seal design of the sealing structure further enhances the sealing effect, prevents external impurities from entering and silicone oil from leaking, and ensures the stability of the sensor operation. 2. The corrosion-resistant oil cup for a pressure sensor proposed in this utility model, by setting axial ribs on the inner wall of the oil storage tank, divides the silicone oil flow space, structurally suppresses the generation of silicone oil eddies, avoids eddies interfering with pressure signal transmission, and ensures the detection accuracy of the sensor; and the smooth transition design between the ribs and the oil storage tank reduces silicone oil retention and flow resistance, ensuring uniform pressure transmission, while also facilitating cleaning and maintenance; in addition, the precise positioning function of the positioning groove improves assembly efficiency and cup installation stability, further ensuring the overall performance of the sensor. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation of the corrosion-resistant oil cup of a pressure sensor according to this utility model; Figure 2 This is a structural diagram of the corrosion-resistant oil cup of a pressure sensor according to this utility model; Figure 3This is an exploded view of the corrosion-resistant oil cup of a pressure sensor according to this utility model.

[0020] In the diagram: 1. Cup body; 11. Protrusion; 12. Oil reservoir; 13. Rib; 14. Positioning groove; 15. Sealing groove; 16. Sealing ring. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0022] like Figure 1 and Figure 2 As shown, a corrosion-resistant oil cup for a pressure sensor includes a cup body 1, which is made entirely of polytetrafluoroethylene. A protrusion 11 is provided at the bottom of the cup body 1, and the protrusion 11 is arc-shaped near the edge of the cup body 1. An arc-shaped surface is provided at the inner bottom edge of the oil storage tank 12, which is adapted to the arc-shaped surface of the protrusion 11. The arc-shaped protrusion 11 is adapted to the edge of the cup body 1 and the arc-shaped surface of the inner bottom of the oil storage tank 12. On the one hand, it can reduce the resistance of silicone oil when flowing at the bottom of the oil storage tank 12 and avoid the flow obstruction caused by local silicone oil accumulation. On the other hand, it can disperse the pressure borne by the bottom of the cup body 1 and prevent the cup body 1 from deforming due to stress concentration. At the same time, the arc-shaped structure can reduce the probability of corrosive media residue at the corners, further improving the corrosion resistance. An oil storage tank 12 is provided at the top of the cup body 1 to store the silicone oil inside. Multiple ribs 13 are equidistantly arranged on the inner wall of the oil reservoir 12 in the circumferential direction to divide the silicone oil flow space within the oil reservoir 12 and suppress eddy current generation. The multiple ribs 13 are all arranged along the axial direction of the cup body 1, and their bottom ends are smoothly transitioned to the inner bottom of the oil reservoir 12, while their top ends are arc-shaped transitioned to the top opening of the oil reservoir 12. The axially arranged ribs 13 can divide the silicone oil flow space within the oil reservoir 12 into multiple independent fan-shaped areas. When the sensor is subjected to vibration or pressure changes that cause silicone oil to flow, the ribs 13 can block the circumferential movement of the silicone oil, thereby effectively suppressing the generation of eddy currents, avoiding interference of eddy currents with pressure transmission, and ensuring detection accuracy. At the same time, the smooth transition and arc-shaped transition structure at both ends of the ribs 13 can eliminate flow dead angles, reduce the retention of silicone oil at the connection between the ribs 13 and the oil reservoir 12, reduce the aging rate of silicone oil, and facilitate cleaning and maintenance.

[0023] like Figure 2As shown, the outer arc wall of the cup body 1 is provided with a positioning groove 14 that is adapted to the built-in core of the pressure sensor. The positioning groove 14 is semi-circular. The semi-circular positioning groove 14 is adapted to the built-in core of the pressure sensor, which can realize the precise positioning of the cup body 1 inside the sensor, prevent the cup body 1 from shifting during installation or use, ensure the relative position of the oil reservoir 12 and the core is stable, and ensure that the silicone oil can uniformly transmit pressure to the core. At the same time, the arc structure of the positioning groove 14 can increase the contact area between the cup body 1 and the core, disperse the local pressure of the core on the cup body 1, avoid damage to the cup body 1 due to excessive local force, and facilitate quick alignment during installation, thus improving assembly efficiency.

[0024] like Figure 3 As shown, a sealing structure is provided at the bottom of the cup body 1 near the edge to ensure a compression seal between the cup body 1 and the pressure sensor housing. The sealing structure includes a sealing groove 15 located at the bottom of the cup body 1 near the outer arc wall. A sealing ring 16 is engaged inside the sealing groove 15. The sealing groove 15 provides a stable installation space for the sealing ring 16, preventing the sealing ring 16 from shifting or falling off during the compression sealing process, thus ensuring the accuracy of the sealing position. The engagement connection facilitates the replacement and maintenance of the sealing ring 16. When the sealing ring 16 ages or is damaged, it can be quickly disassembled and replaced, reducing maintenance costs. At the same time, the structural design of the sealing groove 15 increases the contact area between the sealing ring 16 and the cup body 1, improving the installation stability of the sealing ring 16 and ensuring the durability of the sealing effect. The sealing ring 16 is made of fluororubber, which has excellent corrosion resistance, high temperature resistance and aging resistance. It can resist the erosion of various corrosive media such as acids, alkalis and organic solvents, and adapt to the complex working environment that the pressure sensor may face. At the same time, fluororubber has good elastic recovery performance, and can maintain good sealing performance under long-term compression, avoiding media leakage caused by the aging and failure of the sealing ring 16, extending the service life of the sealing structure, and further ensuring the overall reliability of the pressure sensor. The height of the sealing ring 16 exceeds the depth of the sealing groove 15. When the cup body 1 is installed and squeezed with the pressure sensor housing, the sealing ring 16 will be squeezed by the housing and undergo elastic deformation. The deformed sealing ring 16 can fully fill the gap between the cup body 1 and the housing, forming an interference seal. This effectively prevents external corrosive media from entering the sensor and also prevents silicone oil leakage in the oil reservoir 12, ensuring the reliability of the seal and avoiding the impact on the sensor's detection accuracy and service life due to incomplete sealing.

[0025] In use, the sealing ring 16 is first installed in the sealing groove 15 at the bottom of the cup body 1. Then, the cup body 1 is aligned with the built-in core of the pressure sensor through the positioning groove 14, so that the cup body 1 is accurately positioned in the sensor housing. Next, an appropriate amount of silicone oil is injected into the oil reservoir 12. Finally, the sensor housing is assembled in place. At this time, the sealing ring 16 undergoes elastic deformation under the compression of the housing and the cup body 1, thus achieving a seal. During the operation of the sensor, the rib 13 inhibits the generation of silicone oil eddies. The polytetrafluoroethylene cup body 1 and the fluororubber sealing ring 16 jointly resist the erosion of corrosive media, ensuring the stable operation of the sensor.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A corrosion-proof oil cup for a pressure sensor comprising a cup body (1), characterized in that: The cup body (1) is made of polytetrafluoroethylene. The bottom of the cup body (1) is provided with a protrusion (11), and an oil storage tank (12) is provided at the top of the cup body (1) to store the silicone oil inside. The inner wall of the oil storage tank (12) is provided with multiple ribs (13) arranged at equal intervals in the circumferential direction to divide the silicone oil flow space in the oil storage tank (12) and suppress the generation of eddies. The bottom of the cup body (1) is provided with a sealing structure near the edge to ensure the compression seal between the cup body (1) and the pressure sensor housing.

2. A corrosion resistant oil cup for a pressure sensor according to claim 1, wherein: The protrusion (11) and the cup body (1) are arranged in an arc shape near the edge, and the inner bottom edge of the oil storage tank (12) is provided with an arc surface that matches the arc surface of the protrusion (11).

3. A corrosion resistant oil cup for a pressure sensor according to claim 2, wherein: The multiple ribs (13) are arranged along the axial direction of the cup body (1), and their bottom ends are smoothly transitioned to the inner bottom of the oil storage tank (12), and their top ends are arc-shaped transitioned to the top opening of the oil storage tank (12).

4. The corrosion-resistant oil cup for a pressure sensor according to claim 1, characterized in that: The outer arc wall of the cup body (1) is provided with a positioning groove (14) that is adapted to the built-in core of the pressure sensor, and the positioning groove (14) is set in a semi-circular arc shape.

5. The corrosion resistant oil cup for a pressure sensor of claim 1, wherein: The sealing structure includes a sealing groove (15) located at the bottom of the cup body (1) near the outer arc wall, and a sealing ring (16) is engaged inside the sealing groove (15).

6. The corrosion-resistant oil cup for a pressure sensor according to claim 5, characterized in that: The sealing ring (16) is made of fluororubber.

7. The corrosion-resistant oil cup for a pressure sensor according to claim 6, characterized in that: The height of the sealing ring (16) exceeds the depth of the sealing groove (15).

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