High-precision ceramic pressure sensor

By introducing a pressure relief mechanism into the ceramic pressure sensor, the damage caused by overpressure is solved, automatic pressure relief and impurity filtration are achieved, ensuring the safety and long life of the sensor.

CN223179684UActive Publication Date: 2025-08-01WUXI SHENGSAI SENSOR TECH CO LTD
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Patent Information

Application Number
CN202421894985.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-07
Publication Date
2025-08-01
Estimated Expiration
2034-08-07

AI Technical Summary

Technical Problem

The existing high-precision ceramic pressure sensor lacks a pressure relief structure, which makes it impossible to relieve pressure when the pressure is too high, resulting in damage to the internal structure and components, affecting the accuracy and service life.

Method used

A pressure relief mechanism including a sliding groove, a fixed block, a groove, a pressure relief hole, a mounting groove, a filter, a spring and a limit block is designed. The opening size of the pressure relief hole is automatically adjusted through the compression of the spring and the movement of the limit block, so as to achieve automatic pressure relief during overpressure, and filter impurities through the filter.

Benefits of technology

Effectively prevent sensor damage due to overvoltage, ensure safe operation of the system, extend service life, reduce replacement frequency, and maintain the stability and accuracy of measurement results.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the related technical field of ceramic pressure sensors, in particular to a high-precision ceramic pressure sensor, which comprises a sensor body and a pressure relief mechanism, the pressure relief mechanism is arranged on one side of the surface of the sensor body, and an installation mechanism is arranged on the surface of the sensor body. According to the high-precision ceramic pressure sensor, through the arrangement of the sliding groove, the fixing block, the groove, the pressure relief hole, the mounting groove, the filter screen, a spring and a limiting block, when the pressure in the sensor body rises, the spring is stressed and compressed, then the limiting block is driven to move from the sliding groove to the groove, and after the limiting block completely leaves the sliding groove, the closed pressure relief hole is gradually opened at the moment; meanwhile, impurities are filtered out through the filter screen, the purity of the medium is ensured, finally, the safety of the equipment is ensured, and the service life of the equipment is prolonged.
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Description

Technical Field

[0001] The utility model relates to the technical field of ceramic pressure sensors, in particular to a high-precision ceramic pressure sensor. Background Technique

[0002] Ceramic pressure sensors utilize the piezoelectric effect of ceramic materials to detect and measure pressure changes. Its main functions include converting mechanical pressure into electrical signals, providing high-precision and high-sensitivity pressure measurement. Such sensors have the characteristics of high temperature resistance, corrosion resistance, impact resistance, and strong long-term stability, and are suitable for various harsh environments. They are widely used in industrial automation, automotive engineering, hydraulic and pneumatic systems, medical equipment, and environmental monitoring, etc., to ensure the safe and reliable operation of the system. With the increasing scope of use, the accuracy of the sensor often cannot be guaranteed. Therefore, there is a particular need for a high-precision ceramic pressure sensor.

[0003] However, for existing high-precision ceramic pressure sensors, the existing ceramic pressure sensors do not have a pressure relief structure and cannot relieve pressure when the pressure is too high, which may cause damage to their internal structures and components, thereby affecting the accuracy and service life of the pressure sensor. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high-precision ceramic pressure sensor to solve the problems in the above background technique, that is, for existing high-precision ceramic pressure sensors, the existing ceramic pressure sensors do not have a pressure relief structure and cannot relieve pressure when the pressure is too high, which may cause damage to their internal structures and components, thereby affecting the accuracy and service life of the pressure sensor.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A high-precision ceramic pressure sensor, comprising a body and a pressure relief mechanism. A pressure relief mechanism is arranged on one side of the surface of the body, and a mounting mechanism is arranged on the surface of the body;

[0006] The pressure relief mechanism includes a sliding groove, a fixing block, a groove, a pressure relief hole, a mounting groove, a filter screen, a spring, and a limiting block. A sliding groove is opened on the surface of the body, a fixing block is fixedly connected to the surface of the body, a groove is opened on one side of the surface of the fixing block, pressure relief holes are opened around the fixing block, a mounting groove is opened on one side of the surface of the groove, a filter screen is fixedly connected to the inside of the pressure relief hole, a spring is fixedly connected to the inside of the mounting groove, and the other side of the spring is connected to a limiting block.

[0007] Preferably, there are four groups of sliding grooves, and the positions of the sliding grooves are opposite to those of the grooves.

[0008] Preferably, one side of the limiting block is fitted inside the sliding groove, and the limiting block and the groove form a mutually sliding structure through the spring.

[0009] Preferably, eight groups of springs are provided, and the pressure relief holes are evenly distributed on the fixed block.

[0010] Preferably, four groups of fixed blocks are provided, and the positions of the fixed blocks are aligned with the sliding grooves.

[0011] Preferably, the installation mechanism includes a first thread groove, a thread ring, a plug, a hexagon bolt, a threaded rod, and a pressure inlet. A first thread groove is provided on one side of the surface of the device body, a thread ring is fixedly connected to the other side of the device body, a plug is threadedly connected inside the first thread groove, the thread ring is threadedly fitted inside the hexagon bolt, the other side of the hexagon bolt is fixedly connected to an external threaded rod, and a pressure inlet is provided inside the external threaded rod.

[0012] Preferably, the pressure inlet penetrates through the external threaded rod, and one side of the hexagon bolt is in close contact with the device body.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: for this high-precision ceramic pressure sensor, through the setting of the pressure relief mechanism, the pressure relief mechanism can automatically release excess pressure under overpressure conditions, prevent damage to the sensor and related equipment, ensure the safe operation of the system, and by protecting the sensor from damage caused by excessive pressure, the pressure relief mechanism helps to extend the service life of the sensor, reduce the need for frequent replacement, and the pressure relief mechanism can prevent the influence of pressure fluctuations on the performance of the sensor, ensuring the stability and accuracy of the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic side view of the external structure of the present utility model;

[0015] Figure 2 is a schematic exploded view of a partially cut-away pressure relief mechanism of the present utility model;

[0016] Figure 3 is a schematic exploded view of a partially cut-away installation mechanism of the present utility model;

[0017] Figure 4 is the present utility model Figure 2 The enlarged schematic view at position A in.

[0018] In the figure: 1, device body; 2, pressure relief mechanism; 201, sliding groove; 202, fixed block; 203, groove; 204, pressure relief hole; 205, installation groove; 206, filter screen; 207, spring; 208, limit block; 3, installation mechanism; 301, first thread groove; 302, thread ring; 303, plug; 304, hexagon bolt; 305, threaded rod; 3,06 pressure inlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Please refer to Figures 1-4 , the present invention provides a technical solution: a high-precision ceramic pressure sensor, including a body 1 and a pressure relief mechanism 2. A pressure relief mechanism 2 is arranged on one side of the surface of the body 1, and a mounting mechanism 3 is arranged on the surface of the body 1;

[0021] The pressure relief mechanism 2 includes a chute 201, a fixed block 202, a groove 203, a pressure relief hole 204, a mounting groove 205, a filter screen 206, a spring 207 and a limit block 208. A chute 201 is opened on the surface of the body 1, a fixed block 202 is fixedly connected to the surface of the body 1, a groove 203 is opened on one side of the surface of the fixed block 202, pressure relief holes 204 are opened around the fixed block 202, a mounting groove 205 is opened on one side of the surface of the groove 203, a filter screen 206 is fixedly connected to the inside of the pressure relief hole 204, a spring 207 is fixedly connected to the inside of the mounting groove 205, and the other side of the spring 207 is connected to a limit block 208. Through the settings of the chute 201, the fixed block 202, the groove 203, the pressure relief hole 204, the mounting groove 205, the filter screen 206, the spring 207 and the limit block 208, when the pressure inside the body 1 increases, the spring 207 is compressed by the force, and then drives the limit block 208 to move from the chute 201 into the groove 203. When the limit block 208 completely leaves the chute 201, the closed pressure relief hole 204 will gradually open, and then the excess pressure will be discharged. At the same time, the filter screen 206 filters out impurities to ensure the purity of the medium, ultimately ensuring the safety of the device and extending the service life of the device.

[0022] Furthermore, four groups of chutes 201 are provided, and the positions of the chutes 201 are opposite to those of the grooves 203. Through the setting of the chutes 201, when the pressure inside the body 1 increases, the spring 207 is compressed, and the limit block 208 moves from the chute 201 into the groove 203 to adjust the opening size of the pressure relief hole 204 and release the excess pressure. At the same time, the chute 201 provides an independent sliding channel for the limit block 208, avoiding interference or obstruction of the limit block 208 by other mechanical components during the movement process. This design improves the reliability and durability of the pressure relief mechanism 2 and reduces the risk of failure caused by mechanical interference.

[0023] Furthermore, one side of the limit block 208 is fitted inside the sliding groove 201. The limit block 208 and the groove 203 form a sliding structure with each other through the spring 207. With the setting of the limit block 208, when the pressure rises, the spring 207 is compressed, and the limit block 208 moves outwards, increasing the opening of the pressure relief hole 204 to quickly release the excess pressure. On the contrary, when the pressure drops, the spring 207 pushes the limit block 208 to move inwards to reduce the opening of the pressure relief hole 204 and reduce the pressure release. By adjusting the opening size of the pressure relief hole 204, the limit block 208 can effectively control the pressure inside the body 1, preventing equipment damage or dangerous accidents caused by excessive pressure. This automatic adjustment mechanism ensures that the equipment can operate safely under different working conditions and avoids safety problems caused by overpressure or underpressure.

[0024] Furthermore, eight groups of springs 207 are provided and are evenly distributed on the fixed block 202. With the settings of the pressure relief hole 204 and the spring 207, the pressure relief hole 204 is a key component in the body 1 and is used to release the excess internal pressure to the external environment. When the internal pressure exceeds the set threshold, the pressure relief hole 204 opens to allow the pressure medium to discharge, preventing the equipment from being damaged due to overpressure. At the same time, a filter screen 206 is installed inside the pressure relief hole 204. While releasing the pressure medium, impurities are filtered out to prevent foreign objects from entering the equipment interior. This filtering and control mechanism helps to keep the interior of the equipment clean and extends the service life of the equipment. The elastic force of the spring 207 enables the limit block 208 to automatically adjust the opening of the pressure relief hole 204 according to the change of the internal pressure, achieving precise pressure control. This automatic adjustment mechanism ensures that the equipment can operate safely under different pressure conditions and avoids equipment failures caused by overpressure or underpressure. At the same time, eight groups of springs 207 are provided and are distributed in the installation groove 205, providing uniform resilience to ensure the smooth movement of the limit block 208 in the sliding groove 201. Finally, the spring 207 has good earthquake resistance and shock resistance performance and can absorb shock energy through elastic deformation when the equipment is subjected to external vibration or impact, protecting the pressure relief mechanism 2 from damage.

[0025] Furthermore, four groups of fixed blocks 202 are provided, and the positions of the fixed blocks 202 are opposite to the sliding groove 201. With the setting of the fixed blocks 202, the fixed blocks 202 are fixed on the surface of the body 1, providing the basic structure of the entire pressure relief mechanism 2. It supports and fixes key components such as the groove 203 and the pressure relief hole 204, enabling these components to remain stable during operation and not move or deform due to pressure or vibration. At the same time, four groups of fixed blocks 202 are provided and are distributed on the surface of the body 1, providing multi-point support and enhancing the structural stability of the entire pressure relief system. This multi-point support design enables the fixed blocks 202 to effectively disperse pressure and stress, improving the durability and safety of the equipment in a high-pressure environment.

[0026] Furthermore, the installation mechanism 3 includes a first threaded groove 301, a threaded ring 302, a plug 303, a hexagon bolt 304, a threaded rod 305, and a pressure inlet 306. A first threaded groove 301 is provided on one side of the surface of the device body 1, and a threaded ring 302 is fixedly connected to the other side of the device body 1. The plug 303 is threadedly connected inside the first threaded groove 301. The threaded ring 302 is threadedly fitted inside the hexagon bolt 304. The other side of the hexagon bolt 304 is fixedly connected to an external threaded rod 305, and a pressure inlet 306 is provided inside the external threaded rod 305. Through the settings of the first threaded groove 301, the threaded ring 302, the plug 303, the hexagon bolt 304, the threaded rod 305, and the pressure inlet 306, the installation mechanism 3 achieves sealing through the first threaded groove 301 and the threaded ring 302, and uses the plug 303 and the hexagon bolt 304. The pressure inlet 306 inside the external threaded rod 305 is used for the input of the medium to ensure the normal operation of the device.

[0027] Furthermore, the pressure inlet 306 penetrates through the external threaded rod 305, and one side of the hexagon bolt 304 is in close contact with the device body 1. Through the setting of the hexagon bolt 304, the hexagon bolt 304 is threadedly fitted inside the threaded ring 302 to achieve a tight fixation with the device body 1. One side of it is in close contact with the device body 1 to ensure the stable connection of each component of the installation mechanism 3 and avoid loosening or falling off. The tight combination of the hexagon bolt 304 and the external threaded rod 305 achieves effective sealing through threaded connection. This sealing design prevents the leakage of the medium, ensures the flow of the medium in the predetermined path, and improves the reliability and safety of the system.

[0028] Working principle: First, the installation mechanism 3 achieves sealing through the first threaded groove 301 and the threaded ring 302, and uses the plug 303 and the hexagon bolt 304. The pressure inlet 306 inside the external threaded rod 305 is used for the input of the medium to ensure the normal operation of the device. After that, it can be used. When the pressure inside the device body 1 increases, the spring 207 is compressed under force, and then drives the limit block 208 to move from the sliding groove 201 to the groove 203. When the limit block 208 completely leaves the sliding groove 201, the closed pressure relief hole 204 will gradually open, and then the excess pressure will be discharged. At the same time, the filter screen 206 filters out impurities to ensure the purity of the medium, ultimately ensuring the safety of the device and extending the service life of the device.

[0029] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirits of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-precision ceramic pressure sensor, comprising a device body (1) and a pressure relief mechanism (2), characterized in that: On one side of the surface of the body (1), a pressure relief mechanism (2) is provided, and an installation mechanism (3) is provided on the surface of the body (1). The pressure relief mechanism (2) includes a chute (201), a fixed block (202), a groove (203), a pressure relief hole (204), an installation groove (205), a filter screen (206), a spring (207), and a limit block (208). A chute (201) is formed on the surface of the body (1), a fixed block (202) is fixedly connected to the surface of the body (1), a groove (203) is formed on one side of the surface of the fixed block (202), pressure relief holes (204) are formed around the fixed block (202), an installation groove (205) is formed on one side of the surface of the groove (203), a filter screen (206) is fixedly connected inside the pressure relief hole (204), a spring (207) is fixedly connected inside the installation groove (205), and the other side of the spring (207) is connected to a limit block (208).

2. The high-precision ceramic pressure sensor according to claim 1, wherein: There are four groups of the chutes (201), and the positions of the chutes (201) are aligned with the groove (203).

3. The high-precision ceramic pressure sensor according to claim 1, characterized in that: One side of the limit block (208) is fitted inside the chute (201), and the limit block (208) and the groove (203) form a mutually sliding structure through the spring (207).

4. A high-precision ceramic pressure sensor according to claim 1, characterized in that: There are eight groups of the springs (207), and the pressure relief holes (204) are evenly distributed on the fixed block (202).

5. A high-precision ceramic pressure sensor according to claim 1, characterized in that: There are four groups of the fixed blocks (202), and the positions of the fixed blocks (202) are aligned with the chutes (201).

6. A high-precision ceramic pressure sensor according to claim 1, characterized in that: The installation mechanism (3) includes a first thread groove (301), a thread ring (302), a plug (303), a hexagon bolt (304), a threaded rod (305), and a pressure inlet (306). A first thread groove (301) is formed on one side of the surface of the body (1), a thread ring (302) is fixedly connected to the other side of the body (1), a plug (303) is threadedly connected inside the first thread groove (301), the thread ring (302) is threadedly fitted inside the hexagon bolt (304), the other side of the hexagon bolt (304) is fixedly connected to an external threaded rod (305), and a pressure inlet (306) is formed inside the external threaded rod (305).

7. A high-precision ceramic pressure sensor according to claim 6, characterized in that: The pressure inlet (306) penetrates through the external threaded rod (305), and one side of the hexagon bolt (304) is in close contact with the body (1).