Ceramic sealing element for pressure sensor

Abstract

The utility model relates to the technical field of pressure sensors, in particular to a ceramic sealing element for a pressure sensor, which comprises a rectangular sealing shell, a shell cavity which penetrates through one side end wall of the sealing shell and is used for placing the pressure sensor is arranged in the sealing shell, and an air outlet nozzle is fixedly connected to the right side end wall of the sealing shell. And a vacuumizing channel which is communicated with the shell cavity and is used for vacuumizing is arranged in the air outlet nozzle in a penetrating manner. The pressure sensor is placed in the shell cavity of the sealing shell, the upper sealing plate is covered, the clamping ring and the fixed ring of the sealing plate are clamped in the notch of the sealing shell, the ring gasket and the ring edge gasket are sealing rings made of rubber and are used for improving the sealing performance of the sealing plate to the shell cavity, and finally, the screws are tightened, and the sealing plate is sealed and positioned.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensor technology, and in particular to ceramic seals for pressure sensors. Background Technology

[0002] Ceramic seals for pressure sensors are mainly used in precision components for aerospace applications. This particular ceramic part is primarily used for sealing sensors on motherboards.

[0003] Previous ceramic seals only had a shell, which could provide a sealing function, but the air inside could not be released after sealing, which affected the sensitivity of the sensor. The main sealing part could not create a vacuum inside the component, resulting in the sensor being completely sealed and the sensor's sensitivity decreasing. Utility Model Content

[0004] The purpose of this invention is to provide a ceramic seal for pressure sensors.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A ceramic seal for a pressure sensor includes a rectangular sealing shell with a cavity for housing the pressure sensor extending through one end wall of the sealing shell. An vent is fixed to the right end wall of the sealing shell, and a vacuum channel for evacuating the vacuum is provided inside the vent and communicating with the cavity.

[0007] Preferably, a rectangular sealing plate is provided on the end wall of the sealing shell near the opening of the shell cavity.

[0008] Preferably, screws are threaded through and connected to the four corner end walls of the sealing plate, and a retaining ring is fixed to the end wall of the sealing plate near the shell cavity.

[0009] Preferably, a fixed ring is fixedly connected to the center of the end wall of the retaining ring, and a ring gasket is adhered to the end wall at the connection between the retaining ring and the fixed ring.

[0010] Preferably, a ring edge gasket is adhered to the central sidewall of the fixed ring, and a groove is provided on the end wall of the sealing shell near the retaining ring.

[0011] Preferably, the shape and structure formed by the retaining ring and the fixed ring are consistent with the shape and structure of the groove, so that the retaining ring and the fixed ring can be inserted into the groove together.

[0012] This utility model has at least the following beneficial effects:

[0013] 1. The air outlet is used for vacuuming. The vacuum channel provides simple sealing protection for the cavity, and also allows the air inside the sealed cavity to be discharged, reducing the impact on the sensor's sensitivity.

[0014] 2. Place the pressure sensor into the cavity of the sealing shell, close the sealing plate, and insert the retaining ring and fixing ring of the sealing plate into the groove of the sealing shell. The ring gasket and the ring edge gasket are rubber sealing rings used to increase the sealing performance of the sealing plate to the cavity. Finally, tighten the screws to seal and position the sealing plate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 A schematic diagram of the vacuum channel;

[0018] Figure 3 for Figure 1 A front view of the sealing plate at the sealing shell;

[0019] Figure 4 for Figure 1 A three-dimensional schematic diagram of the sealing plate.

[0020] In the diagram: 1. Sealing shell; 2. Shell cavity; 3. Vent; 4. Vacuum channel; 5. Sealing plate; 6. Screw; 7. Snap ring; 8. Ring washer; 9. Fixed ring; 10. Ring edge washer; 11. Groove. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution for ceramic seals for pressure sensors:

[0023] like Figure 1-4 As shown, the ceramic seal for the pressure sensor includes a rectangular sealing shell 1. The sealing shell 1 has a cavity 2 for placing the pressure sensor, which penetrates one end wall of the sealing shell 1. An air outlet 3 is fixed to the right end wall of the sealing shell 1. A vacuum channel 4 for evacuating the vacuum is connected to the cavity 2 inside the air outlet 3.

[0024] A rectangular sealing plate 5 is provided on the end wall of the sealing shell 1 near the opening of the shell cavity 2. Screws 6 are threaded through and connected to the four corner end walls of the sealing plate 5. A retaining ring 7 is fixedly connected to the end wall of the sealing plate 5 near the shell cavity 2. A fixed ring 9 is fixedly connected to the center of the end wall of the retaining ring 7. A ring gasket 8 is bonded to the end wall where the retaining ring 7 and the fixed ring 9 are connected.

[0025] A ring edge gasket 10 is bonded to the center side wall of the fixed ring 9. A groove 11 is opened on the end wall of the sealing shell 1 near the retaining ring 7. The shape and structure formed by the retaining ring 7 and the fixed ring 9 match the shape and structure of the groove 11, so that the retaining ring 7 and the fixed ring 9 can be inserted into the groove 11 together.

[0026] Working principle:

[0027] A pressure sensor is placed in the cavity 2 of the sealing shell 1, and the sealing plate 5 is closed. The retaining ring 7 and the fixing ring 9 of the sealing plate 5 are inserted into the groove 11 of the sealing shell 1. The ring gasket 8 and the ring edge gasket 10 are rubber sealing rings used to increase the sealing performance of the sealing plate 5 to the cavity 2. Finally, the screw 6 is tightened to seal and position the sealing plate 5.

[0028] The air outlet 3 is used for vacuuming. The vacuum channel 4 provides simple sealing protection for the cavity 2. The vacuum channel 4 also allows the air inside the sealed cavity 2 to be discharged, reducing the impact on the sensitivity of the sensor.

[0029] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. Ceramic seal for pressure sensors, comprising a rectangular seal housing (1), characterized in that The sealing shell (1) is provided with a shell cavity (2) for placing a pressure sensor, which penetrates through one side end wall of the sealing shell (1), a gas outlet nozzle (3) is fixedly connected to the right side end wall of the sealing shell (1), and a vacuum extraction channel (4) for vacuum extraction is arranged in the gas outlet nozzle (3) and communicates with the shell cavity (2).

2. The ceramic seal for a pressure sensor according to claim 1, characterized by The sealing shell (1) is provided with a rectangular sealing plate (5) near the opening of the shell cavity (2).

3. The ceramic seal for a pressure sensor of claim 2, wherein, Screws (6) are arranged in and threadedly connected to the four corner end walls of the sealing plate (5), and a snap ring (7) is fixedly connected to one side end wall of the sealing plate (5) near the shell cavity (2).

4. The ceramic seal for a pressure sensor according to claim 3, characterized by A retaining ring (9) is fixedly connected to the center of the end wall of the snap ring (7), and a ring gasket (8) is bonded to the end wall at the connection between the snap ring (7) and the retaining ring (9).

5. The ceramic seal for a pressure sensor of claim 4, wherein, A ring edge gasket (10) is bonded to the center side wall of the retaining ring (9), and a notch (11) is formed in the end wall near the snap ring (7) of the sealing shell (1).

6. The ceramic seal for a pressure sensor of claim 5, wherein, The shape structure formed by the snap ring (7) and the retaining ring (9) is consistent with the shape structure of the notch (11), so that the snap ring (7) and the retaining ring (9) can be clamped into the notch (11).

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