Rigid glass sealing structure of sensor

Abstract

The utility model relates to the field of sensors, and discloses a rigid glass sealing structure of a sensor, which comprises a shell, a sealing assembly is arranged at the bottom of the outer side of the shell, a pressure guide pipe is arranged in the shell, and a stabilizing assembly is arranged at the top of the pressure guide pipe; the stabilizing assembly comprises low-melting-point glass, the top of the low-melting-point glass is installed on the top of the pressure guide pipe, electrostatic sealing glass is fixedly connected to the top of the low-melting-point glass, and a pressure sensor chip is arranged on the middle side of the top of the electrostatic sealing glass. In the utility model, the special low-melting-point glass of which the thermal expansion coefficient is matched with the static sealing glass and the shell is used for sealing, so that the low-melting-point glass still has good rigidity and stability after being melted, and parameter change caused by glue connection can be effectively reduced, thereby remarkably improving the performance and long-term stability of the sensor.

Description

Technical Field

[0001] The utility model relates to the field of sensors, in particular to a rigid glass sealing structure of a sensor. Background Art

[0002] A sensor is a detection device that converts sensed information into electrical signals or other desired output formats, often according to specific patterns. This is done to meet requirements for information transmission, processing, storage, display, recording, or control. Common types include temperature, pressure, photoelectric, and acceleration sensors, which are widely used in industrial automation, smart homes, and medical devices. They are key components in realizing the Internet of Things and intelligent systems.

[0003] In the design of pressure sensors, the chip and glass are usually an integrated structure. Traditionally, the glass and metal shell are connected by glue. However, glue has poor stability during long-term use and can easily cause zero-point drift and creep of the pressure sensor, thereby affecting measurement accuracy.

[0004] In view of the above problems, a sensor rigid glass sealing structure is proposed to solve the above problems. Utility Model Content

[0005] In order to remedy the above shortcomings, the utility model provides a rigid glass sealing structure for the sensor, which aims to improve the existing technology of connecting glass and metal shell by glue. However, the glue has poor stability during long-term use and is prone to cause zero drift and creep of the pressure sensor, thereby affecting the measurement accuracy.

[0006] In order to achieve the above-mentioned object, the utility model adopts the following technical solution: a rigid glass sealing structure of a sensor, comprising a housing, a sealing assembly is provided at the outer bottom of the housing, a pressure pipe is provided inside the housing, and a stabilizing assembly is provided at the top of the pressure pipe;

[0007] The stabilizing component includes low-melting-point glass, the top of the low-melting-point glass is mounted on the top of the pressure guiding tube, the top of the low-melting-point glass is fixedly connected to an electrostatic sealing glass, and a pressure sensor chip is arranged on the middle side of the top of the electrostatic sealing glass.

[0008] As a further description of the above technical solution:

[0009] The sealing assembly includes a fixed shell, the top of the fixed shell is fixedly connected to the bottom of the outer shell, a sealing groove is opened inside the fixed shell, and a sealing ring is fixedly connected inside the sealing groove.

[0010] As a further description of the above technical solution:

[0011] The outer side of the pressure guiding tube is arranged on the inner side of the sealing ring.

[0012] As a further description of the above technical solution:

[0013] The outer side of the low-melting-point glass is fixedly connected to the inner wall of the shell.

[0014] As a further description of the above technical solution:

[0015] The shell is made of stainless steel, and the pressure-guiding tube is made of metal.

[0016] As a further description of the above technical solution:

[0017] The thermal expansion coefficient of the low-melting-point glass matches that of the electrostatic sealing glass and the housing.

[0018] As a further description of the above technical solution:

[0019] The sealing ring is in the shape of a circular ring.

[0020] As a further description of the above technical solution:

[0021] The outer side of the pressure guiding tube is fixedly connected to the inside of the fixed shell.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the present invention, sealing is performed by using a special low-melting-point glass whose thermal expansion coefficient matches that of the electrostatic sealing glass and the housing, so that the low-melting-point glass still has good rigidity and stability after melting, which can effectively reduce the parameter changes caused by the glue connection, thereby significantly improving the performance and long-term stability of the sensor.

[0024] 2. In the present invention, the sealing ring is placed in the sealing groove and is tightly combined with the pressure pipe and the fixed shell to ensure the sealing inside the sensor, thereby preventing dust, moisture and other impurities in the external environment from entering the sensor, ensuring the long-term stable operation of the sensor and maintaining the accuracy and reliability of the measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional diagram of a rigid glass sealing structure for a sensor proposed in the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of a low-melting-point glass for a rigid glass sealing structure of a sensor proposed in the present invention;

[0027] Figure 3 This is a structural schematic diagram of a sealing groove of a sensor rigid glass sealing structure proposed by the present invention.

[0028] Legend:

[0029] 1. Outer shell; 2. Fixed shell; 3. Pressure pipe; 4. Sealing groove; 5. Sealing ring; 6. Low-melting-point glass; 7. Electrostatic sealing glass; 8. Pressure sensor chip. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] Reference Figure 1 - Figure 3 The present invention provides an embodiment of a sensor rigid glass sealing structure, comprising a housing 1, a sealing assembly disposed on the outer bottom of the housing 1, a pressure pipe 3 disposed inside the housing 1, and a stabilizing assembly disposed on the top of the pressure pipe 3;

[0032] The stabilizing component includes a low-melting-point glass 6 , the top of which is mounted on the top of the pressure-guiding tube 3 , the top of which is fixedly connected to an electrostatic sealing glass 7 , and a pressure sensor chip 8 is provided on the middle side of the top of the electrostatic sealing glass 7 .

[0033] Specifically, the sealing assembly ensures the tightness of the housing 1, the pressure-guiding tube 3 accurately transmits external pressure to the sensor, and the stabilizing assembly enhances structural stability and reliability. The low-melting-point glass 6 ensures good rigidity and stability after melting. The electrostatic sealing glass 7 and pressure sensor chip 8 accurately convert pressure changes into electrical output signals.

[0034] Reference Figure 2 The sealing assembly includes a fixed shell 2, the top of the fixed shell 2 is fixedly connected to the bottom of the outer shell 1, a sealing groove 4 is opened inside the fixed shell 2, and a sealing ring 5 is fixedly connected inside the sealing groove 4.

[0035] Specifically, the sealing groove 4 is used to accommodate the sealing ring 5 to enhance the sealing effect. The sealing ring 5 is used to prevent dust, moisture, etc. in the external environment from entering the interior of the housing 1, thereby ensuring the long-term stability and measurement accuracy of the sensor.

[0036] Reference Figure 1 - Figure 3The outer side of the pressure-guiding tube 3 is arranged on the inner side of the sealing ring 5, and the outer side of the low-melting-point glass 6 is fixedly connected to the inner wall of the outer shell 1. The outer shell 1 is made of stainless steel, and the pressure-guiding tube 3 is made of metal. The thermal expansion coefficient of the low-melting-point glass 6 matches the electrostatic sealing glass 7 and the outer shell 1. The sealing ring 5 is annular, and the outer side of the pressure-guiding tube 3 is fixedly connected to the inside of the fixed shell 2.

[0037] Specifically, the sealing ring 5 ensures the seal between the pressure-conducting tube 3 and the sealing ring 5, preventing impurities from the external environment from entering the sensor. The low-melting-point glass 6 provides a stable connection interface and ensures the stability of the sensor's internal structure. The housing 1 is made of stainless steel to improve the corrosion resistance and mechanical strength of the sensor. The pressure-conducting tube 3 is made of metal to ensure sufficient strength and pressure-conducting performance. The thermal expansion coefficient of the low-melting-point glass 6 matches that of the electrostatic sealing glass 7 and the housing 1 to reduce stress caused by temperature changes and improve the long-term stability and reliability of the sensor. The sealing ring 5 is annular to better cooperate with the pressure-conducting tube 3 and the fixed housing 2 to ensure a good seal. The pressure-conducting tube 3 is used to ensure the stability of the pressure-conducting tube 3.

[0038] Working principle: During use, when external pressure is applied, the pressure is first transmitted to the low-melting-point glass 6 through the pressure-conducting tube 3, and then transmitted to the pressure sensor chip 8 through the electrostatic sealing glass 7. The pressure change is then converted into an electrical signal by the pressure sensor chip 8, and finally a readable output signal is generated through the signal processing module. Since the thermal expansion coefficient of the low-melting-point glass 6 matches the outer shell 1 and the electrostatic sealing glass 7, it can effectively reduce the measurement error caused by inconsistent thermal expansion of the material in an environment with large temperature changes. In order to ensure the long-term stability and reliability of the sensor, the sealing ring 5 is placed in the sealing groove 4, which is tightly combined with the pressure-conducting tube 3 and the fixed shell 2 to ensure the sealing inside the sensor.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A sensor rigid glass sealing structure, comprising a housing (1), characterized in that: A sealing component is provided at the bottom of the outer side of the housing (1), a pressure-guiding tube (3) is provided inside the housing (1), and a stabilizing component is provided at the top of the pressure-guiding tube (3); The stabilizing component comprises a low-melting-point glass (6), the top of the low-melting-point glass (6) is mounted on the top of the pressure-guiding tube (3), the top of the low-melting-point glass (6) is fixedly connected to an electrostatic sealing glass (7), and a pressure sensor chip (8) is provided on the middle side of the top of the electrostatic sealing glass (7).

2. The sensor rigid glass sealing structure according to claim 1, characterized in that: The sealing assembly comprises a fixed shell (2), the top of the fixed shell (2) is fixedly connected to the bottom of the outer shell (1), a sealing groove (4) is provided inside the fixed shell (2), and a sealing ring (5) is fixedly connected inside the sealing groove (4).

3. The sensor rigid glass sealing structure according to claim 2, characterized in that: The outer side of the pressure guiding tube (3) is arranged on the inner side of the sealing ring (5).

4. The sensor rigid glass sealing structure according to claim 1, characterized in that: The outer side of the low-melting-point glass (6) is fixedly connected to the inner wall of the outer shell (1).

5. The sensor rigid glass sealing structure according to claim 1, characterized in that: The housing (1) is made of stainless steel, and the pressure-guiding tube (3) is made of metal.

6. The sensor rigid glass sealing structure according to claim 1, characterized in that: The thermal expansion coefficient of the low-melting-point glass (6) matches that of the electrostatic sealing glass (7) and the housing (1).

7. The sensor rigid glass sealing structure according to claim 2, characterized in that: The sealing ring (5) is in the shape of a ring.

8. The sensor rigid glass sealing structure according to claim 2, characterized in that: The outer side of the pressure guiding tube (3) is fixedly connected to the inside of the fixed shell (2).

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