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Anti-freezing structure

A technology of ring structure and deformation structure, which is applied in measuring devices, instruments, measuring fluid pressure, etc., can solve problems such as inability to completely eliminate stress and difficulty in volume compression, and achieve protection from damage, good compression performance, and stress elimination. Effect

Pending Publication Date: 2018-11-16
ADVANCED PLATINUM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the rubber structure is a whole without gaps, it is difficult to compress the volume and the stress cannot be completely eliminated.

Method used

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Examples

Experimental program
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Embodiment Construction

[0014] figure 2 It is a sectional view of Example 1. Such as figure 2 As shown, the present invention includes a housing 1 . The inner surface of the housing 1 is provided with an annular inwardly protruding placement platform, and the pressure sensor 2 is placed on the placement platform in the housing 1 and fixed. Inside the housing 1, below the pressure sensor 2, there is a cavity. Below the cavity is the part where the housing 1 contacts the liquid, that is, the liquid contact structure. A rubber deformation structure is placed in the cavity. The rubber deformation structure includes an annular rubber plug 3 and a support column 4 .

[0015] The section of the annular rubber plug 3 is I-shaped, including an upper annular structure, a middle annular structure and a lower annular structure. The shape and area of ​​the upper ring structure and the lower ring structure are the same, and the positions are corresponding. The middle ring structure connects the upper ring ...

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Abstract

The invention discloses an anti-freezing structure. The anti-freezing structure comprises a casing; a pressure sensor is fixed in the casing; a rubber deformation structure is placed in the casing andunder the pressure sensor; the rubber deformation structure comprises an annular rubber plug and a support ring; and a cavity exists between the annular rubber plug and the support ring. Thus, a rubber structure in a sensor packaging structure is redesigned, an air chamber is added to the rubber structure, so that the rubber structure has a higher compression performance, a stress generated by expansion of the liquid volume can be eliminated completely, and a pressure sensor can be protected against damage effectively.

Description

technical field [0001] The invention relates to a device packaging structure, in particular to an antifreeze structure. Background technique [0002] In life or production, for some liquid containers, it is necessary to add a sensor to test the liquid pressure. For example, in an automobile exhaust emission filter device, urea is used as a reducing agent to treat exhaust gas, and a pressure sensor needs to be installed in the urea container. , to detect the capacity of urea, so as to add it in time; another example is in the water pump, it is also necessary to add a pressure sensor to detect the pressure of the liquid flowing through the water pump. However, at low temperature, the liquid will freeze and expand, causing stress and causing damage to the sensor. How to package the sensor is a problem encountered in the industry. [0003] In the existing technology, such as figure 1 As shown, the pressure sensor 2 is packaged in the housing 1, and there is a rubber structure ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L19/06
CPCG01L19/06Y02E10/40
Inventor 周敬训谷庆伟
Owner ADVANCED PLATINUM TECH