CN213455961U - Sealing structure of pressure sensor - Google Patents

Abstract

The utility model provides a pressure sensor's seal structure, the disk seat is installed in the hollow outer cylinder of sensor body lower part, and hollow outer cylinder lower part is equipped with the round fluting, and the grooved outside is the lower border portion of hollow outer cylinder, has seted up the indent mesa on the disk seat, and sealed cavity is constituteed with the fluting to the indent mesa, and O type circle is established in sealed cavity, and O type circle is the elastic ring, and it all contacts with indent mesa and grooved inner wall, and the lower extreme of lower border portion is located the below of indent mesa. The beneficial effects are as follows: the utility model realizes normal and radial double sealing, greatly increasing the sealing effect and reliability; and O type circle is wrapped up in sealed cavity, can not contact the air for a long time, has also avoided because of the sealed inefficacy risk that rapid ageing caused.

Description

Sealing structure of pressure sensor

Technical Field

The utility model relates to a sealed field especially indicates a pressure sensor's seal structure.

Background

The pressure sensors of the vehicle-mounted power battery thermal management system, the vehicle-mounted air conditioning system, the vehicle-mounted heat dissipation system and the like in the current market are mainly used in a sealing mode: the built-in O-shaped ring normal sealing structure and the exposed outer O-shaped ring normal sealing structure.

In the normal sealing structure with the built-in O-shaped ring, most of the air outlet holes of the sensors on the market are in eccentric design, as shown in fig. 4, the air outlet holes of the sensors are easily blocked after the O-shaped ring is installed and compressed, and the sensors fail.

In the exposed outer O-shaped ring normal sealing structure, as shown in FIG. 5, the O-shaped ring is sealed in a normal direction, and the sealing mode is single; the O-shaped ring is exposed, the aging speed is high, the service life is greatly reduced, and the sealing failure is easily caused for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that exists among the prior art, provide a pressure sensor's seal structure.

The technical scheme of the utility model is realized like this:

a sealing structure of a pressure sensor, comprising: sensor body, O type circle, disk seat, the disk seat is installed in the hollow outer cylinder of sensor body lower part, hollow outer cylinder lower part is equipped with the round fluting, the grooved outside does the lower border portion of hollow outer cylinder the indent mesa has been seted up on the disk seat, the indent mesa with sealed cavity is constituteed to the fluting, O type circle is established in the sealed cavity.

Furthermore, the O-shaped ring is an elastic ring and is in contact with the inner wall of the concave table top and the inner wall of the groove.

Further, the lowest end of the lower edge part is positioned below the concave table-board.

The beneficial effects are that:

the O-shaped ring is compressed and then respectively contacted with the concave table surface of the valve seat and the grooved inner wall of the sensor body, so that normal and radial double sealing is realized, two sealing modes can coexist, and the sealing effect and the sealing reliability are greatly improved;

2. the O-shaped ring is also wrapped inside a cavity formed by the sensor body and the valve seat, so that the phenomenon that the O-shaped ring is too quickly aged due to long-term exposure in the air is avoided, and the sealing failure risk caused by too quick aging is also avoided.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a sectional view of the present invention;

FIG. 3 is an enlarged view of A;

FIG. 4 is a schematic view of a built-in "O" ring normal seal structure;

FIG. 5 is a schematic view of a normal seal configuration for an exposed outer "O" ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1 to 5, a sealing structure of a pressure sensor includes: sensor body 1, O type circle 3, disk seat 2 installs in hollow outer cylinder 4 of sensor body 1 lower part, and hollow outer cylinder 4 lower part is equipped with round fluting 5, and the outside of fluting 5 is hollow outer cylinder 4's lower limb 6, has seted up indent mesa 7 on disk seat 2, and sealed cavity 8 is constituteed with fluting 5 to indent mesa 7, and O type circle 3 is established in sealed cavity 8, and O type circle 3 is the elastic ring, and its inner wall with indent mesa 7 and fluting 5 all contacts.

The lowermost end of the lower edge portion 6 is located below the recessed mesa 7.

After the sensor body 1 is screwed up with the valve seat 2, the O-shaped ring 3 is compressed and then respectively contacts the inner concave table surface 7 of the valve seat 2 and the inner wall of the groove 5 of the sensor body 1, normal direction and radial direction double sealing is realized, as is well known, the radial sealing effect is greater than that of the normal direction, the structure can realize coexistence of two sealing modes, and the sealing effect and the sealing reliability are greatly improved.

The O-shaped ring 3 is also wrapped inside a cavity formed by the sensor body 1 and the valve seat 2, so that the phenomenon that the O-shaped ring is too quickly aged due to long-term exposure in the air is avoided, and the sealing failure risk caused by too quick aging is also avoided.

The structure can not cause the phenomenon that the built-in O-shaped ring 3 can block the air outlet of the sensor.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A sealing structure of a pressure sensor, comprising: sensor body, O type circle, disk seat, its characterized in that: the valve seat is installed in the hollow outer cylinder of sensor body lower part, hollow outer cylinder lower part is equipped with the round fluting, the grooved outside does the lower edge portion of hollow outer cylinder set up the indent mesa on the valve seat, the indent mesa with the fluting constitution sealed cavity, O type circle is established in the sealed cavity.

2. The seal structure of a pressure sensor according to claim 1, characterized in that: the O-shaped ring is an elastic ring and is in contact with the inner concave table surface and the inner wall of the groove.

3. The seal structure of a pressure sensor according to claim 1, characterized in that: the lowest end of the lower edge part is positioned below the concave table-board.

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