A fluid pressure regulating channel mechanism for a pressure sensor

Abstract

The utility model relates to pressure sensor technical field, concretely is a kind of fluid pressure regulating channel mechanism for pressure sensor, including the first, second, third flow passage that pressure port is mutually from inside to outside intercommunication, and the annular support seat of inner chamber bottom wall, sealing ring slot and sealing ring;The first, third flow passage inner diameter is same and greater than second flow passage, and the third flow passage length is less than second flow passage, and the second flow passage length is less than the first flow passage. Each flow passage port and junction are equipped with different orientation horn annular inclined groove, realize pressure multistage regulation. Annular support seat supports pressure response module, sealing ring slot adapts sealing ring to ensure that fluid accurately acts on pressure response module. The mechanism can buffer instantaneous pressure, protect pressure response module, improve detection accuracy and sensor stability, adapt complex working condition, prolong sensor life.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor technology, and in particular to a fluid pressure regulating channel mechanism for a pressure sensor. Background Technology

[0002] In fields such as industrial automation, automotive electronics, and aerospace, pressure sensors serve as core detection components, bearing the crucial responsibility of accurately acquiring fluid pressure parameters. Traditional pressure sensors typically employ a single cylindrical through-hole as the pressure flow channel, directly introducing external fluid pressure into the pressure sensing module within the sensor. However, in real-world applications, the external pressure medium is often unstable due to factors such as equipment start-up and shutdown, and fluid pulsation. Instantaneous peak pressure can easily impact the bottom of the pressure sensing module. This not only leads to micro-damage and performance drift in the pressure sensing module due to stress concentration, but also significantly shortens the sensor's lifespan over the long term.

[0003] Meanwhile, traditional structures have defects in fluid sealing. Pressure media can easily cross the flow channel and penetrate into other areas of the pressure port seat cavity, interfering with the normal operation of electronic components and causing deviations in pressure detection results, making it difficult to meet the high-precision and high-reliability industrial testing requirements.

[0004] Therefore, optimizing and upgrading the pressure transmission and sealing structure of pressure sensors has become a key breakthrough direction for improving their performance and adapting to complex working conditions. Utility Model Content

[0005] The purpose of this invention is to overcome the problems of the prior art and provide a fluid pressure regulating channel mechanism for a pressure sensor to solve the technical problem of pressure sensing module being damaged by instantaneous peak pressure impact due to the instability of external pressure medium.

[0006] The above objectives are achieved through the following technical solutions: A fluid pressure regulating channel mechanism for a pressure sensor includes a pressure port seat, which includes a pressure port and a port seat cavity connected to each other. A pressure regulating channel is formed on the pressure port, and the pressure regulating channel includes a first flow channel, a second flow channel, and a third flow channel that are connected to each other from the inside out. The first flow channel and the third flow channel have the same inner diameter, and both of their inner diameters are larger than the inner diameter of the second flow channel. The length of the third flow channel is less than the length of the second flow channel, and the length of the second flow channel is less than the length of the first flow channel.

[0007] Furthermore, the outer port of the first flow channel is provided with a first annular groove in the shape of a horn and an opening facing the inner cavity of the port seat; the connection between the first flow channel and the second flow channel is provided with a second annular groove in the shape of a horn and an opening facing the inner cavity of the first flow channel; the outer port of the third flow channel is provided with a fourth annular groove in the shape of a horn and an opening facing outward; the connection between the second flow channel and the third flow channel is provided with a third annular groove in the shape of a horn and an opening facing the inner cavity of the third flow channel.

[0008] Furthermore, the bottom wall of the inner cavity of the port seat is provided with an annular support for supporting the bottom of the pressure sensing module, and the inner side of the annular support is provided with a sealing ring groove, and a sealing ring is adapted to fit in the sealing ring groove.

[0009] Furthermore, the height of the inner ring of the sealing ring groove is less than the height of the outer ring.

[0010] Furthermore, the first flow channel, the second flow channel, and the third flow channel are arranged coaxially.

[0011] Furthermore, the flared angle of the first annular inclined groove is 30° to 60°.

[0012] Furthermore, the flared angle of the second annular groove is 45° to 75°.

[0013] Furthermore, the flared angle of the third annular inclined groove is 30° to 60°.

[0014] Furthermore, the flared angle of the fourth annular inclined groove is 45° to 75°.

[0015] Furthermore, the inner walls of the first flow channel, the second flow channel, and the third flow channel are all provided with a smooth coating to reduce fluid flow resistance.

[0016] This invention provides a fluid pressure regulating channel mechanism for a pressure sensor. Through the collaborative design of multiple flow channels and annular inclined grooves, a progressive fluid pressure regulation system is constructed. From the medium inlet cavity to the electrode action surface, pressure gradient buffering and precise control are achieved, effectively avoiding the impact of instantaneous high pressure on the pressure sensing module and significantly extending the sensor's lifespan. The combination of annular support base and a specially structured sealing ring groove creates a reliable fluid sealing barrier, ensuring the pressure medium acts directionally on the pressure sensing module, eliminating infiltration interference, and greatly improving pressure detection accuracy. The coaxial layout of the flow channels, the smooth inner wall coating, and the anti-corrosion treatment of the pressure port seat collaboratively ensure stable fluid flow and sensor structural reliability, making it adaptable to complex working conditions such as corrosive media and pulsating fluids. While protecting core components and optimizing detection performance, it expands the application scenarios of pressure sensors, providing a more reliable pressure detection solution for fields such as industrial automation and automotive electronics. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a fluid pressure regulating channel mechanism for a pressure sensor according to the present invention; Figure 2 This is a first-view perspective perspective view of a fluid pressure regulating channel mechanism for a pressure sensor according to the present invention. Figure 3 This is a second-view perspective perspective view of a fluid pressure regulating channel mechanism for a pressure sensor according to the present invention. Figure 4 This is a schematic diagram of the fluid pressure regulating channel mechanism for a pressure sensor described in this utility model applied to a pressure sensor.

[0018] Illustration markings: 1-Pressure port seat, 101-Pressure port, 102-Port seat inner cavity; 2-Pressure regulating channel, 201-First flow channel, 202-Second flow channel, 203-Third flow channel, 204-First annular inclined groove, 205-Second annular inclined groove, 206-Third annular inclined groove, 207-Fourth annular inclined groove; 3-Pressure sensing module; 4- Annular support base; 5-Sealing ring groove; 6-Sealing ring; 7-Connector. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. The described embodiments are merely some, not all, of the embodiments of the present 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] like Figures 1-3 As shown, this solution provides a fluid pressure regulating channel mechanism for a pressure sensor, including a pressure port seat 1. The pressure port seat 1 includes a pressure port 101 and a port seat cavity 102 connected to each other. A pressure regulating channel 2 is provided on the pressure port 101. The pressure regulating channel 2 includes a first flow channel 201, a second flow channel 202 and a third flow channel 203 that are connected to each other from the inside to the outside.

[0021] The specific structure of the flow channel is as follows: like Figure 1As shown, the inner diameters of the first flow channel 201 and the third flow channel 203 are the same, and both are larger than the inner diameter of the second flow channel 202. The length of the third flow channel 203 is less than the length of the second flow channel 202, and the length of the second flow channel 202 is less than the length of the first flow channel 201. The outer port of the first flow channel 201 is provided with a flared first annular groove 204 with an opening facing the inner cavity 102 of the port seat. The connection between the first flow channel 201 and the second flow channel 202 is provided with a flared second annular groove 205 with an opening facing the inner cavity of the first flow channel 201. The outer port of the third flow channel 203 is provided with a flared fourth annular groove 207 with an opening facing outward. The connection between the second flow channel 202 and the third flow channel 203 is provided with a flared third annular groove 206 with an opening facing the inner cavity of the third flow channel 203.

[0022] As an optimization of the flow channel structure in pressure regulation channel 2, the following is an example: The first flow channel 201, the second flow channel 202, and the third flow channel 203 are coaxially arranged to ensure stable fluid flow and avoid pressure fluctuations caused by flow channel eccentricity.

[0023] The flared angle of the first annular inclined groove 204 is 30° to 60°. This angle range allows the fluid to enter the first flow channel 201 smoothly, initially buffering the pressure.

[0024] The second annular inclined groove 205 has a flared opening angle of 45° to 75°, which is beneficial for regulating the pressure of the fluid entering the second flow channel 202 from the first flow channel 201 and changing the fluid velocity and direction.

[0025] The third annular inclined groove 206 has a flared opening angle of 30° to 60°, which further adjusts the fluid entering the third flow channel 203 from the second flow channel 202, so that the fluid flows out more smoothly.

[0026] The flared angle of the fourth annular inclined groove 207 is 45° to 75°, which facilitates the smooth entry of external pressure medium into the third flow channel 203, and at the same time plays a preliminary buffering role.

[0027] The pressure port seat 1 is made of metal and has an anti-corrosion coating on its surface, which improves the corrosion resistance of the pressure port seat 1 and makes it suitable for different media environments.

[0028] The inner walls of the first flow channel 201, the second flow channel 202, and the third flow channel 203 are all provided with a smooth coating to reduce fluid flow resistance, make fluid flow smoother, and also help to stabilize and regulate pressure.

[0029] like Figure 4As shown, the pressure sensor also includes a connector 7, which is electrically connected to the pressure sensing module 3 for signal transmission, transmitting the pressure signal detected by the pressure sensing module 3.

[0030] As a further optimization of this solution, the bottom wall of the inner cavity of the pressure port seat 1 is provided with an annular support seat 4 for supporting the bottom of the pressure sensing module 3. A sealing ring groove 5 is provided inside the annular support seat 4. The height of the inner ring of the sealing ring groove 5 is less than the height of the outer ring, and a sealing ring 6 is fitted inside the sealing ring groove 5. The sealing ring 6 is made of a high-pressure resistant and corrosion-resistant elastic material, and is fitted to the size of the sealing ring groove 5 to ensure a good sealing effect and prevent fluid penetration.

[0031] The working principle of this method is as follows: The external pressure medium first enters the third flow channel 203 through the fourth annular groove 207, which initially buffers the instantaneous excessive pressure. Then, the fluid enters the second flow channel 202. Since the inner diameter of the second flow channel 202 is smaller than that of the third flow channel 203, the fluid velocity changes, and the third annular groove 206 at the connection between the second and third flow channels 202 further regulates the pressure. Then, the fluid enters the first flow channel 201. Since the inner diameter of the first flow channel 201 is larger than that of the second flow channel 202, the flow velocity changes again, and the second annular groove 205 at the connection between the first and second flow channels 201 continues to regulate the pressure. Finally, the fluid acts on the bottom of the pressure sensing module 3 through the first annular groove 204 at the outer port of the first flow channel 201. The first annular groove 204 makes the fluid act on the pressure sensing module 3 smoothly. Meanwhile, the annular support seat 4 on the bottom wall of the inner cavity of the pressure port seat 1 supports the pressure sensing module 3, and the sealing ring 6 in the sealing ring groove 5 ensures that the fluid only acts on the bottom of the pressure sensing module 3 and will not penetrate into other areas of the inner cavity. Through the cooperation of multiple flow channels and annular inclined grooves, multi-level adjustment of fluid pressure is achieved, reducing the impact of instantaneous excessive pressure on the pressure sensing module 3.

[0032] The above description is only for illustrating the embodiments of this utility model and is not intended to limit this utility model. For those skilled in the art, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fluid pressure regulating channel mechanism for a pressure sensor, comprising a pressure port seat (1) including a pressure port (101) and a port seat inner cavity (102) connected to each other, characterized in that, The pressure port (101) is provided with a pressure regulating channel (2), which includes a first flow channel (201), a second flow channel (202) and a third flow channel (203) that are connected to each other from the inside to the outside. The first flow channel (201) and the third flow channel (203) have the same inner diameter, and both of their inner diameters are larger than the inner diameter of the second flow channel (202). The length of the third flow channel (203) is less than the length of the second flow channel (202), and the length of the second flow channel (202) is less than the length of the first flow channel (201).

2. A fluid pressure regulating channel mechanism for a pressure sensor according to claim 1, wherein, The outer port of the first flow channel (201) is provided with a first annular groove (204) in the shape of a horn and facing the inner cavity (102) of the port seat. The connection between the first flow channel (201) and the second flow channel (202) is provided with a second annular groove (205) in the shape of a horn and facing the inner cavity of the first flow channel (201). The outer port of the third flow channel (203) is provided with a fourth annular groove (207) in the shape of a horn and facing outward. The connection between the second flow channel (202) and the third flow channel (203) is provided with a third annular groove (206) in the shape of a horn and facing the inner cavity of the third flow channel (203).

3. A fluid pressure regulating channel mechanism for a pressure sensor according to claim 1 or 2, characterized in that, The bottom wall of the inner cavity (102) of the port seat is provided with an annular support seat (4) for supporting the bottom of the pressure sensing module (3). The inner side of the annular support seat (4) is provided with a sealing ring groove (5), and a sealing ring (6) is adapted in the sealing ring groove (5).

4. A fluid pressure regulating channel mechanism for a pressure sensor according to claim 3, wherein The height of the inner ring of the sealing ring groove (5) is less than the height of the outer ring.

5. A fluid pressure regulating channel mechanism for a pressure sensor according to claim 2, characterized in that, The first flow channel (201), the second flow channel (202), and the third flow channel (203) are coaxially arranged.

6. The fluid pressure regulating channel mechanism for a pressure sensor according to claim 2 or 5, wherein The flared angle of the first annular inclined groove (204) is 30° to 60°.

7. The fluid pressure regulating channel mechanism for a pressure sensor according to claim 2 or 5, wherein The flared angle of the second annular inclined groove (205) is 45° to 75°.

8. A fluid pressure regulating channel mechanism for a pressure sensor according to claim 2 or 5, characterized in that, The flared angle of the third annular inclined groove (206) is 30° to 60°.

9. The fluid pressure regulating channel mechanism for a pressure sensor according to claim 2 or 5, wherein The flared angle of the fourth annular inclined groove (207) is 45° to 75°.

10. The fluid pressure regulating channel mechanism for a pressure sensor according to claim 1, wherein, The inner walls of the first flow channel (201), the second flow channel (202), and the third flow channel (203) are all provided with a smooth coating to reduce fluid flow resistance.

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