High-precision ceramic pressure sensor device

Abstract

The utility model relates to the technical field of pressure sensors, and provides a high-precision ceramic pressure sensor device which comprises a protective shell and a sensor body, the protective shell comprises a first shell and a second shell, an inner cavity of the protective shell is provided with a plurality of anti-impact assemblies, and each anti-impact assembly comprises a first damping seat and a second damping seat. According to the utility model, the anti-impact assembly is arranged to protect the ceramic pressure sensor, the first shell and the second shell are assembled to protect the ceramic pressure sensor, and when the first shell and the second shell are subjected to impact force, the ceramic pressure sensor is protected. The first shell can perform buffer protection on the top end of the ceramic pressure sensor under the action of a first shock absorption seat, a first damping shock absorber and a first shock absorption plate, and the second shell can perform buffer protection on the bottom end of the ceramic pressure sensor under the action of a second shock absorption seat, a second damping shock absorber and a second shock absorption plate. The influence of impact force on the ceramic pressure sensor is effectively reduced, and the service life and reliability of the ceramic pressure sensor are improved.

Description

Technical Field

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

[0002] The ceramic pressure sensor does not transfer liquid. The pressure acts directly on the front surface of the ceramic diaphragm, causing the diaphragm to deform slightly. The thick film resistor is printed on the back of the ceramic diaphragm and connected into a closed bridge. Due to the piezoresistive effect of the varistor, the bridge generates a highly linear voltage signal that is proportional to the pressure and also proportional to the excitation voltage.

[0003] For example, the announcement number CN212180160U discloses a high-precision ceramic chip pressure sensor. The technical key points are: a collection head, a shell, and a ceramic chip. The shell is hollow, and the ceramic chip is arranged inside the collection head and the shell. The collection head includes a collection rod and a baffle. The collection rod is provided with an axially extending collection hole, and the collection hole connects the outside world and the ceramic chip. The ceramic chip is provided with a collection groove on the side facing the collection head, and a guide rod is provided on the side facing the shell. The guide rod corresponds to the position of the collection groove. The collection hole extends axially and penetrates the guide rod. The guide rod can be embedded in the collection groove. The guide rod is provided with an annular receiving groove, and the receiving groove is provided with a sealing ring. The utility model has high precision and fast response during measurement, and the probability of medium leakage is low, and it is more stable.

[0004] However, in the prior art, during actual use, conventional ceramic pressure sensors may still be damaged or cracked when subjected to large impacts or vibrations, despite the high hardness of the ceramic material, which affects the service life and reliability of the ceramic pressure sensor, thereby limiting the practicality of the device to a certain extent. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that although the hardness of ceramic materials is very high, they may still be damaged or cracked when subjected to large impact or vibration, thereby affecting the service life and reliability of ceramic pressure sensors.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a high-precision ceramic pressure sensor device, including a protective shell and a sensor body, the protective shell including shell one and shell two, the inner cavity of the protective shell is provided with a plurality of impact-resistant components, the impact-resistant components including shock-absorbing seat one and shock-absorbing seat two, the shock-absorbing seat one is fixedly arranged in an annular shape on the inner top wall of shell one, the shock-absorbing seat two is fixedly arranged in an annular shape on the inner bottom wall of shell two, the bottom end of the shock-absorbing seat one is fixedly connected to a damping shock absorber one, the bottom end of the damping shock absorber one is fixedly connected to a shock-absorbing plate one, the top end of the shock-absorbing seat two is fixedly connected to a damping shock absorber two, and the top end of the damping shock absorber two is fixedly connected to a shock-absorbing plate two.

[0007] As a preferred embodiment, the sensor body includes a ceramic diaphragm, a pressure sensor body and a ceramic cover plate, and the sensor body is placed in a protective shell, a mounting hole 1 is opened at the axis center of the upper surface of the shell 1, and a mounting hole 2 is opened at the axis center of the lower surface of the shell 2.

[0008] As a preferred implementation, the pressure sensor body is placed in the inner cavity of the lower surface of the ceramic diaphragm, and the ceramic cover plate is threadedly connected to the ceramic diaphragm to fix the pressure sensor body.

[0009] As a preferred embodiment, the inner side wall of the shell one is annularly fixedly connected with a plurality of spring shock absorbers one, one end of the spring shock absorber one is fixedly connected with a limiting plate one, and the inner side wall of the shell two is annularly fixedly arranged with a plurality of spring shock absorbers two, one end of the spring shock absorber two is fixedly connected with a limiting plate two.

[0010] As a preferred embodiment, a thread one is provided at an edge of the upper surface of the shell two, and the shell two is threadably connected to the shell one via the thread one.

[0011] As a preferred embodiment, a collecting rod is fixedly connected to the axis of the upper surface of the ceramic diaphragm, and a second thread is provided at the edge of the upper surface of the collecting rod. The second thread is threadedly connected to the collecting head through a mounting groove, and the mounting groove is arranged on the inner side wall of the lower surface of the collecting head.

[0012] As a preferred embodiment, a sealing ring 1 is sleeved on the surface of the collecting rod near the upper position of the shell 1, and a sealing ring 2 is sleeved on the surface of the collecting rod near the lower position of the shell 1.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] The utility model provides an impact-resistant component to protect the ceramic pressure sensor. The shell one and the shell two are assembled to protect the ceramic pressure sensor. When the shell one and the shell two are subjected to impact force, the shell one will buffer and protect the top end of the ceramic pressure sensor under the action of the shock-absorbing seat one, the damping shock absorber one and the shock-absorbing plate one, while the shell two will buffer and protect the bottom end of the ceramic pressure sensor under the action of the shock-absorbing seat two, the damping shock absorber two and the shock-absorbing plate two, thereby effectively reducing the influence of the impact force on the ceramic pressure sensor and improving the service life and reliability of the ceramic pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the three-dimensional structure of a high-precision ceramic pressure sensor device provided by the utility model;

[0016] Figure 2 A schematic diagram of the structure of the impact-resistant component of the high-precision ceramic pressure sensor device provided by the utility model;

[0017] Figure 3 A schematic diagram of the sensor body structure disassembly of the high-precision ceramic pressure sensor device provided by the utility model;

[0018] Figure 4 A schematic diagram of the cross-section of the structure of the acquisition head of the high-precision ceramic pressure sensor device provided by the utility model;

[0019] Legend:

[0020] 1. Shell 1; 2. Shell 2; 3. Mounting hole 1; 4. Shock absorber seat 1; 5. Damping shock absorber 1; 6. Shock absorber plate 1; 7. Spring shock absorber 1; 8. Limiting plate 1; 9. Mounting hole 2; 10. Shock absorber seat 2; 11. Damping shock absorber 2; 12. Shock absorber plate 2; 13. Spring shock absorber 2; 14. Limiting plate 2; 15. Thread 1; 16. Ceramic diaphragm; 17. Pressure sensor body; 18. Ceramic cover; 19. Collection rod; 20. Sealing ring 1; 21. Sealing ring 2; 22. Thread 2; 23. Collection head; 24. Mounting slot. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4The utility model provides a technical solution: a high-precision ceramic pressure sensor device, including a protective shell and a sensor body, the protective shell includes a shell 1 and a shell 2, the inner cavity of the protective shell is provided with a plurality of impact-resistant components, the impact-resistant components include a shock-absorbing seat 14 and a shock-absorbing seat 210, the shock-absorbing seat 14 is annularly fixedly arranged on the inner top wall of the shell 1, the shock-absorbing seat 210 is annularly fixedly arranged on the inner bottom wall of the shell 22, the bottom end of the shock-absorbing seat 14 is fixedly connected with a damping shock absorber 15, the bottom end of the damping shock absorber 5 is fixedly connected with a shock-absorbing plate 16, the top end of the shock-absorbing seat 210 is fixedly connected with a damping shock absorber 211, the top of the damping shock absorber 211 is fixedly connected with a damping shock absorber 212, and the top of the damping shock absorber 211 is fixedly connected with a damping shock absorber 213. A shock absorbing plate 12 is fixedly connected to the end of the shell 2, a thread 15 is provided at the edge of the upper surface of the shell 2, and the shell 2 is threadedly connected to the shell 1 through the thread 15. When the shell 1 and the shell 2 are subjected to impact force, the shell 1 will buffer and protect the top of the ceramic pressure sensor under the action of the shock absorbing seat 4, the damping shock absorber 5 and the shock absorbing plate 6, and the shell 2 will buffer and protect the bottom of the ceramic pressure sensor under the action of the shock absorbing seat 10, the damping shock absorber 11 and the shock absorbing plate 12, effectively reducing the impact of the impact force on the ceramic pressure sensor, while enhancing the reliability of the device and extending the service life of the device.

[0023] like Figure 1-4 As shown, the sensor body includes a ceramic diaphragm 16, a pressure sensor body 17 and a ceramic cover plate 18, and the sensor body is placed in a protective shell, a mounting hole 3 is opened at the axis center of the upper surface of the shell 1, and a mounting hole 29 is opened at the axis center of the lower surface of the shell 2. The pressure sensor body 17 is placed in the inner cavity of the lower surface of the ceramic diaphragm 16, and the ceramic cover plate 18 is threadedly connected to the ceramic diaphragm 16 to fix the pressure sensor body 17.

[0024] like Figure 1-4 As shown, a plurality of spring shock absorbers 7 are fixedly connected in an annular manner to the inner wall of the shell 1, one end of the spring shock absorber 7 is fixedly connected to a limiting plate 8, a plurality of spring shock absorbers 13 are fixedly arranged in an annular manner to the inner wall of the shell 2, one end of the spring shock absorber 13 is fixedly connected to a limiting plate 14, the spring shock absorber 7 and the spring shock absorber 13 can perform lateral buffering and shock absorption on the sensor body, thereby enhancing the lateral impact resistance of the sensor body, while the limiting plate 8 and the limiting plate 14 can limit the sensor body to avoid looseness that affects the normal use of the device, thereby further improving the stability and reliability of the device.

[0025] like Figure 1-4As shown, a collecting rod 19 is fixedly connected to the axis of the upper surface of the ceramic diaphragm 16, and a thread 22 is provided at the edge of the upper surface of the collecting rod 19. The thread 22 is threadedly connected to the collecting head 23 through a mounting groove 24, and the mounting groove 24 is arranged on the inner side wall of the lower surface of the collecting head 23. A sealing ring 20 is sleeved on the upper position of the collecting rod 19 near the shell 1, and a sealing ring 21 is sleeved on the lower position of the collecting rod 19 near the shell 1. Due to the threaded installation design adopted, and in combination with the sealing ring 20 and the sealing ring 21, the sealing performance between the collecting rod 19 and the collecting head 23 is greatly enhanced, making the detection more accurate.

[0026] Working principle:

[0027] When in use, first place the pressure sensor body 17 in the inner cavity of the lower surface of the ceramic diaphragm 16, and thread the ceramic cover plate 18 into the lower surface of the ceramic diaphragm 16 to limit the pressure sensor body 17, then place the assembled ceramic pressure sensor in the combined shell 1 and shell 2, the limiting plate 18 and the limiting plate 2 14 wrap and protect the outer surface of the ceramic pressure sensor, and protect the surface of the ceramic pressure sensor under the action of the spring shock absorber 1 7 and the spring shock absorber 2 13, the shock absorbing plate 1 6 is against the upper surface of the ceramic pressure sensor, and the shock absorbing plate 2 12 is against the lower surface of the ceramic pressure sensor. When subjected to impact force, the shell 1 will be in the shock absorbing seat 4 and the damping seat 2. The top of the ceramic pressure sensor is buffered and protected under the action of the shock absorber 15 and the shock absorbing plate 16, and the shell 22 is buffered and protected under the action of the shock absorbing seat 210, the damping shock absorber 211 and the shock absorbing plate 212, which effectively reduces the impact of the impact force on the ceramic pressure sensor, thereby extending the service life of the device and improving the safety and reliability of the device. The collection rod 19 and the collection head 23 are tightly connected through the threaded installation of the installation groove 24 and the thread 22, and the sealing ring 120 and the sealing ring 21 seal the upper and lower ends of the connection between the collection rod 19 and the ceramic diaphragm 16, and the medium enters the surface of the ceramic diaphragm 16 through the through hole 1 and the through hole 2, thereby performing pressure monitoring.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A high-precision ceramic pressure sensor device, comprising a protective housing and a sensor body, characterized in that: The protective shell comprises a shell 1 (1) and a shell 2 (2), the inner cavity of the protective shell is provided with a plurality of impact-resistant components, the impact-resistant components comprising a shock-absorbing seat 1 (4) and a shock-absorbing seat 2 (10), the shock-absorbing seat 1 (4) is fixedly arranged in an annular shape on the inner top wall of the shell 1 (1), the shock-absorbing seat 2 (10) is fixedly arranged in an annular shape on the inner bottom wall of the shell 2 (2), the bottom end of the shock-absorbing seat 1 (4) is fixedly connected to a damping shock absorber 1 (5), the bottom end of the damping shock absorber 1 (5) is fixedly connected to a shock-absorbing plate 1 (6), the top end of the shock-absorbing seat 2 (10) is fixedly connected to a damping shock absorber 2 (11), and the top end of the damping shock absorber 2 (11) is fixedly connected to a shock-absorbing plate 2 (12).

2. The high-precision ceramic pressure sensor device according to claim 1, characterized in that: The sensor body comprises a ceramic diaphragm (16), a pressure sensor body (17) and a ceramic cover plate (18), and the sensor body is placed in a protective shell, a mounting hole (3) is provided at the axis center of the upper surface of the shell (1), and a mounting hole (9) is provided at the axis center of the lower surface of the shell (2).

3. The high-precision ceramic pressure sensor device according to claim 2, characterized in that: The pressure sensor body (17) is placed in the inner cavity of the lower surface of the ceramic diaphragm (16), and the ceramic cover plate (18) is threadedly connected to the ceramic diaphragm (16) to fix the pressure sensor body (17).

4. The high-precision ceramic pressure sensor device according to claim 1, characterized in that: The inner side wall of the shell one (1) is annularly fixedly connected with a plurality of spring shock absorbers one (7), one end of which is fixedly connected to a limiting plate one (8); the inner side wall of the shell two (2) is annularly fixedly arranged with a plurality of spring shock absorbers two (13), one end of which is fixedly connected to a limiting plate two (14).

5. The high-precision ceramic pressure sensor device according to claim 1, characterized in that: A thread one (15) is provided at the edge of the upper surface of the second shell (2), and the second shell (2) is threadedly connected to the first shell (1) via the thread one (15).

6. The high-precision ceramic pressure sensor device according to claim 2, characterized in that: A collection rod (19) is fixedly connected to the axis of the upper surface of the ceramic diaphragm (16), and a second thread (22) is provided at the edge of the upper surface of the collection rod (19). The second thread (22) is threadedly connected to the collection head (23) through a mounting groove (24), and the mounting groove (24) is provided on the inner side wall of the lower surface of the collection head (23).

7. The high-precision ceramic pressure sensor device according to claim 6, characterized in that: A sealing ring 1 (20) is sleeved on the surface of the collection rod (19) at an upper position close to the shell 1 (1), and a sealing ring 2 (21) is sleeved on the surface of the collection rod (19) at a lower position close to the shell 1 (1).

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