Ceramic pressure sensor with inner hole sealing structure

Abstract

The utility model relates to the field of ceramic pressure sensors, in particular to a ceramic pressure sensor with an inner hole sealing structure, which comprises a shell used for installing the ceramic pressure sensor. And the groove is formed in the shell. According to the ceramic pressure sensor with the inner hole sealing structure, the shell, the groove, the first spring, the sealing ring, the ceramic pressure sensor main body, the cover plate and the sealing element are arranged, so that the sealing effect of the ceramic pressure sensor main body and the shell can be improved; the lower portion of the ceramic pressure sensor body is squeezed and rebounded through a first spring below a sealing ring, so that the sealing effect of the ceramic pressure sensor body is enhanced, meanwhile, a cover plate and a sealing piece are installed above the ceramic pressure sensor body, and the sealing effect is achieved; and the internal ceramic pressure sensor main body is extruded, so that the sealing performance of the whole ceramic pressure sensor main body is enhanced.

Description

Technical Field

[0001] The utility model relates to the field of ceramic pressure sensors, and particularly relates to a ceramic pressure sensor with an inner hole sealing structure. Background Art

[0002] A ceramic pressure sensor is a dry-type sensor made of ceramic materials through special processes, and it works by using the piezoresistive effect. This kind of sensor has the characteristics of high elasticity, corrosion resistance, wear resistance, shock resistance and vibration resistance, making it perform excellently in various harsh environments.

[0003] In the existing ceramic pressure sensors, during use, a sealing ring is simply placed in the inner hole of the ceramic pressure sensor for sealing, but the simple sealing by the sealing ring has a poor effect. At the same time, during use, it is inevitable that there will be shaking inside, resulting in the loss of the sealing effect between the outer shell and the internal ceramic pressure sensor.

[0004] Therefore, it is necessary to invent a ceramic pressure sensor with an inner hole sealing structure to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a ceramic pressure sensor with an inner hole sealing structure. By placing the ceramic pressure sensor body in the outer shell, the first spring below the sealing ring is used to squeeze and rebound the lower part of the ceramic pressure sensor body, thereby strengthening the sealing effect of the ceramic pressure sensor body. At the same time, a cover plate and a sealing member are installed above the ceramic pressure sensor body to achieve a sealing effect. Then, through the threaded connection between the threaded gland and the internal thread of the upper shell, the internal ceramic pressure sensor body is squeezed, thereby strengthening the overall sealing performance of the ceramic pressure sensor body to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A ceramic pressure sensor with an inner hole sealing structure, including an outer shell for installing the ceramic pressure sensor;

[0007] A groove is opened inside the outer shell for installing a sealing ring. An installation sleeve is fixedly installed on the outside of the outer shell, and an upper shell is fixedly installed above the outer shell. First springs are fixedly arranged inside the groove, and a sealing ring is fixedly installed on the outside of the first springs;

[0008] A ceramic pressure sensor body is installed inside the outer shell. Signal lines are fixedly connected above the ceramic pressure sensor body. A cover plate is installed above the ceramic pressure sensor body, and a sealing member is installed above the cover plate. The cover plate and the sealing member are used to strengthen the sealing performance;

[0009] The threaded gland is threadedly installed inside the upper shell and is used to enhance the stability of the ceramic pressure sensor body. A protective cover is movably connected inside the threaded gland.

[0010] Preferably, multiple sets of the first springs are provided, and the multiple sets of the first springs are distributed in an annular array. The outer dimensions of the sealing ring match the inner dimensions of the groove.

[0011] Preferably, a PCB board is arranged inside the upper shell. Round holes are formed on the inner surface of the PCB board, and a wire is fixedly installed above the PCB board.

[0012] Preferably, internal threads are provided on the inner surface of the upper shell, and the threaded gland is threadedly connected to the upper shell.

[0013] Preferably, limiting grooves are formed on the inner surfaces of both sides of the threaded gland. A first fixing plate is fixedly installed inside the threaded gland. A second spring is arranged above the first fixing plate, and a second fixing plate is fixedly installed above the second spring.

[0014] Preferably, limiting blocks are fixedly installed on both sides of the protective cover. Elastic dust-proof plates are arranged inside the protective cover, and the limiting blocks are movably sleeved in the limiting grooves inside the threaded gland.

[0015] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0016] Through the settings of the outer shell, groove, first spring, sealing ring, ceramic pressure sensor body, cover plate and seal, the sealing effect between the ceramic pressure sensor body and the outer shell can be improved. By placing the ceramic pressure sensor body inside the outer shell, the first spring below the sealing ring is used to squeeze and rebound the lower part of the ceramic pressure sensor body, thereby enhancing the sealing effect of the ceramic pressure sensor body. At the same time, a cover plate and a seal are installed above the ceramic pressure sensor body to achieve a sealing effect. Then, through the threaded connection method of the threaded gland and the internal thread of the upper shell, the internal ceramic pressure sensor body is squeezed, thereby enhancing the overall sealing performance of the ceramic pressure sensor body;

[0017] Through the settings of the threaded gland, limiting groove, first fixing plate, second spring, second fixing plate, protective cover, limiting block and elastic dust-proof plate, it can not only play a role in dust prevention, but also improve the sealing effect. After the threaded gland is threadedly installed inside the upper shell, the limiting blocks on both sides of the protective cover are inserted into the limiting grooves on both sides inside the threaded gland, and then the protective cover is rotated to make the limiting blocks move in the limiting grooves. When it is rotated to the end and the protective cover is released, the limiting blocks on both sides of the protective cover are clamped in the limiting grooves by the rebound extrusion of the second fixing plate and the second spring below inside the threaded gland, and the elastic dust-proof plate inside the protective cover can wrap the wire to achieve the effect of dust prevention. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 Schematic diagram of the internal structure of the housing of the present utility model;

[0021] Figure 3 Schematic diagram of the threaded gland structure of the present utility model;

[0022] Figure 4 Schematic diagram of the first fixing plate and the second fixing plate of the present utility model;

[0023] Figure 5 Schematic diagram of the protective cover structure of the present utility model.

[0024] Description of the reference numerals in the drawings:

[0025] 1. Housing; 2. Mounting sleeve; 3. Upper shell; 4. Groove; 5. First spring; 6. Sealing ring; 7. Ceramic pressure sensor body; 8. Signal wire; 9. Cover plate; 10. Sealing member; 11. PCB board; 12. Round hole; 13. Electric wire; 14. Internal thread; 15. Threaded gland; 16. Limit groove; 17. First fixing plate; 18. Second spring; 19. Second fixing plate; 20. Protective cover; 21. Limit block; 22. Elastic dust-proof plate. Detailed implementation manners

[0026] To enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail in conjunction with the drawings.

[0027] The present utility model provides a ceramic pressure sensor with an inner hole sealing structure as shown in Figures 1-5 which includes a housing 1 for installing the ceramic pressure sensor;

[0028] A groove 4 is opened inside the housing 1 for installing the sealing ring 6. An installation sleeve 2 is fixedly installed outside the housing 1, and an upper shell 3 is fixedly installed above the housing 1. First springs 5 are fixedly arranged inside the groove 4, and a sealing ring 6 is fixedly installed outside the first springs 5;

[0029] The ceramic pressure sensor body 7 is installed inside the housing 1. Signal lines 8 are fixedly connected above the ceramic pressure sensor body 7. A cover plate 9 is installed above the ceramic pressure sensor body 7, and a seal 10 is installed above the cover plate 9. The cover plate 9 and the seal 10 are used to enhance the sealing performance.

[0030] The threaded gland 15 is threadedly installed inside the upper housing 3 and is used to enhance the stability of the ceramic pressure sensor body 7. A protective cover 20 is movably connected inside the threaded gland 15. By placing the ceramic pressure sensor body 7 inside the housing 1, the first spring 5 below the sealing ring 6 squeezes and rebounds the lower part of the ceramic pressure sensor body 7, thereby enhancing the sealing effect of the ceramic pressure sensor body 7. At the same time, the cover plate 9 and the seal 10 are installed above the ceramic pressure sensor body 7 to achieve a sealing effect. Then, through the threaded connection between the threaded gland 15 and the internal thread of the upper housing 3, the internal ceramic pressure sensor body 7 is squeezed, thereby enhancing the overall sealing performance of the ceramic pressure sensor body 7.

[0031] As Figure 2 shown, multiple groups of the first springs 5 are provided, and the multiple groups of the first springs 5 are distributed in a circular array. The outer dimensions of the sealing ring 6 match the internal dimensions of the groove 4. By using the multiple first springs 5 below the sealing ring 6, the squeezing and rebounding effects are achieved, enabling the sealing ring 6 to be squeezed and adhered to the lower part of the ceramic pressure sensor body 7, thereby enhancing the sealing effect.

[0032] As Figure 2 and Figure 3 shown, a PCB board 11 is provided inside the upper housing 3. Circular holes 12 are formed on the inner surface of the PCB board 11. Wires 13 are fixedly installed above the PCB board 11. By sleeving the circular holes 12 formed on the surface of the PCB board 11 outside the signal lines 8 above the ceramic pressure sensor body 7, a stabilizing and protective effect is achieved.

[0033] As Figure 1 and Figure 3 shown, internal threads 14 are formed on the inner surface of the upper housing 3. The threaded gland 15 is threadedly connected to the upper housing 3. By threadedly connecting the threaded gland 15 inside the upper housing 3, the threaded gland 15 squeezes the lower ceramic pressure sensor body 7, which not only plays a stabilizing role but also enhances the sealing performance.

[0034] As Figure 1 、 Figure 4 and Figure 5As shown in the figure, limiting grooves 16 are provided on the inner side surfaces of both sides of the threaded gland 15. A first fixed plate 17 is fixedly installed inside the threaded gland 15. A second spring 18 is arranged above the first fixed plate 17. A second fixed plate 19 is fixedly installed above the second spring 18. The limiting blocks 21 on both sides of the protective cover 20 are inserted into the limiting grooves 16 on both sides inside the threaded gland 15, and then the protective cover 20 is rotated to make the limiting blocks 21 move within the limiting grooves 16. After rotating to the end, the protective cover 20 is released. Through the rebound extrusion of the second fixed plate 19 and the lower second spring 18 inside the threaded gland 15, the limiting blocks 21 on both sides of the protective cover 20 are stuck in the limiting grooves 16, which facilitates installation and also strengthens the firmness of installation.

[0035] As Figure 1 , Figure 4 and Figure 5 shown in the figure, limiting blocks 21 are fixedly installed on both sides of the protective cover 20. Elastic dust-proof plates 22 are arranged inside the protective cover 20. The limiting blocks 21 are movably sleeved in the limiting grooves 16 inside the threaded gland 15, and the elastic dust-proof plates 22 inside the protective cover 20 can wrap the electric wire 13 to achieve the effect of dust prevention.

[0036] The working principle of this utility model: First, place the ceramic pressure sensor main body 7 in the housing 1. The first spring 5 below the sealing ring 6 squeezes and rebounds below the ceramic pressure sensor main body 7 to strengthen the sealing effect of the ceramic pressure sensor main body 7. Then, place the cover plate 9 and the seal 10 above the ceramic pressure sensor main body 7. Next, place the PCB board 11 above the seal 10. The PCB board 11 and the round hole 12 are sleeved outside the signal wire 8 on the ceramic pressure sensor main body 7. Then, screw the threaded gland 15 into the upper shell 3 for threaded connection. During the screwing process, the internal ceramic pressure sensor main body 7 is squeezed to strengthen the sealing performance and stability of the overall ceramic pressure sensor main body 7. After installation, insert the limiting blocks 21 on both sides of the protective cover 20 into the limiting grooves 16 on both sides inside the threaded gland 15, and then rotate the protective cover 20 to make the limiting blocks 21 move within the limiting grooves 16. After rotating to the end, release the protective cover 20. Through the rebound extrusion of the second fixed plate 19 and the lower second spring 18 inside the threaded gland 15, the limiting blocks 21 on both sides of the protective cover 20 are stuck in the limiting grooves 16. The elastic dust-proof plates 22 inside the protective cover 20 can wrap the electric wire 13 to achieve the effect of dust prevention. Finally, the entire device can be installed at the designated position, and thus the use process of the ceramic pressure sensor with an inner hole sealing structure is completed.

[0037] Only some exemplary embodiments of the present utility model have been described by way of illustration. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present utility model.

Claims

1. A ceramic pressure sensor with an inner hole sealing structure, characterized in that: It comprises a housing (1) for mounting a ceramic pressure sensor; A groove (4) is provided inside the housing (1) and is used for mounting a sealing ring (6); a mounting sleeve (2) is fixedly mounted on the outside of the housing (1); an upper shell (3) is fixedly mounted above the housing (1); a first spring (5) is fixedly mounted inside the groove (4); and a sealing ring (6) is fixedly mounted on the outside of the first spring (5); A ceramic pressure sensor body (7) is installed inside the housing (1); a signal line (8) is fixedly connected to the top of the ceramic pressure sensor body (7); a cover plate (9) is installed above the ceramic pressure sensor body (7); a sealing member (10) is installed above the cover plate (9); the cover plate (9) and the sealing member (10) are used to enhance sealing performance; A threaded gland (15) is threadably mounted inside the upper shell (3) and is used to enhance the stability of the ceramic pressure sensor body (7). A protective cover (20) is movably connected inside the threaded gland (15).

2. The ceramic pressure sensor with an inner hole sealing structure according to claim 1, characterized in that: The first springs (5) are provided in multiple groups, and the multiple groups of the first springs (5) are distributed in an annular array. The outer dimensions of the sealing ring (6) match the inner dimensions of the groove (4).

3. The ceramic pressure sensor with an inner hole sealing structure according to claim 1, characterized in that: A PCB board (11) is arranged inside the upper shell (3), circular holes (12) are provided on the inner surface of the PCB board (11), and electric wires (13) are fixedly installed above the PCB board (11).

4. The ceramic pressure sensor with an inner hole sealing structure according to claim 1, characterized in that: The inner surface of the upper shell (3) is provided with an inner groove (14), and the threaded gland (15) is threadedly connected to the upper shell (3).

5. The ceramic pressure sensor with an inner hole sealing structure according to claim 1, characterized in that: Limiting grooves (16) are provided on both side surfaces of the inner part of the threaded gland (15); a first fixing plate (17) is fixedly installed inside the threaded gland (15); a second spring (18) is arranged above the inner part of the first fixing plate (17); and a second fixing plate (19) is fixedly installed above the second spring (18).

6. The ceramic pressure sensor with an inner hole sealing structure according to claim 1, characterized in that: Limit blocks (21) are fixedly mounted on both sides of the protective cover (20), elastic dustproof plates (22) are arranged inside the protective cover (20), and the limit blocks (21) are movably sleeved with limit grooves (16) inside the threaded gland (15).

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