A screw-in temperature sensor

Abstract

The utility model relates to temperature sensor technical field, aims at providing a screw type temperature sensor, including probe body, thin film platinum resistance element, wire and input output interface, wherein, thin film platinum resistance element is encapsulated in probe body, and thin film platinum resistance element is electrically connected through wire between input output interface, and the probe body is by screw and is established, and the accommodating cavity that is used for placing thin film platinum resistance element is set up on the probe body, and ceramic transition cabin and elastic copper net are filled between thin film platinum resistance element and the inner wall of accommodating cavity, the beneficial effects of the utility model are that ceramic transition cabin and elastic copper net provide layered buffer, and the axial stress when dispersing thread tightening, avoid platinum resistance element direct pressure, and then improve its impact tolerance.

Description

Technical Field

[0001] This utility model relates to the field of temperature sensor technology, and more specifically, to a screw-type temperature sensor. Background Technology

[0002] Currently, in temperature measurement of molds and hydroelectric generator sets, traditional thin-film platinum resistance sensors mostly adopt flat-mount or probe-type packaging. However, in practical applications, they have the following drawbacks: 1. Insufficient mechanical strength: Frequent mechanical contact (such as mold opening and closing) or water flow impact can easily lead to the breakage of the platinum resistance film or deformation of the substrate. 2. Slow thermal conduction: There is an air gap between the ordinary stainless steel sheath and the platinum resistance thermometer, resulting in a slow thermal response (typically >10s). 3. Low installation compatibility: Non-threaded sensors require additional clamps and are difficult to install in narrow mold cavities.

[0003] To address the aforementioned technical issues, a temperature sensor that is easy to install, has high strength, and high thermal conductivity is needed. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model provides a screw-type temperature sensor to solve the technical problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a screw-type temperature sensor, comprising a probe body, a thin-film platinum resistance element, wires, and an input / output interface, wherein the thin-film platinum resistance element is encapsulated within the probe body, the thin-film platinum resistance element is electrically connected to the input / output interface via wires, the probe body is constructed of screws, and a receiving cavity for placing the thin-film platinum resistance element is provided on the probe body, the space between the thin-film platinum resistance element and the inner wall of the receiving cavity is filled with a ceramic transition chamber and an elastic copper mesh.

[0006] By adopting the above technical solution, the ceramic transition chamber and the elastic copper mesh provide layered buffering, disperse the axial stress when the threads are tightened, avoid direct pressure on the platinum resistance element, and thus improve its impact resistance.

[0007] The present invention is further configured such that a thermally conductive layer is filled between the thin-film platinum resistance element and the ceramic transition chamber to improve the temperature response speed.

[0008] The present invention is further configured such that the thermally conductive layer is formed by curing aluminum nitride thermal paste and silicon dioxide spheres.

[0009] The present invention is further configured such that the heat-conducting layer is filled in the gaps of the elastic copper mesh.

[0010] The present invention is further configured such that the elastic copper mesh is corrugated.

[0011] Compared with the prior art, the present invention provides a screw-type temperature sensor, which has the following advantages: 1. Stress isolation: Layered buffering is achieved through ceramic transition chambers and elastic copper mesh to disperse axial stress during thread tightening and prevent the thin-film platinum resistance element from being directly subjected to pressure.

[0012] 2. Fast heat transfer: The gaps in the elastic copper mesh are filled with aluminum nitride thermal paste, which contains silica spheres. This ensures thermal conductivity while also providing allowance for elastic deformation.

[0013] 3. High installation compatibility: The probe body uses a standard threaded screw, which can be directly connected to the temperature measuring hole of the mold, making installation convenient and highly adaptable. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a screw-type temperature sensor. Figure 2 This is a schematic diagram of the cross-sectional structure of the probe body.

[0015] In the diagram: 1. Probe body; 2. Thin-film platinum resistance element; 3. Wire; 4. Input / output interface; 5. Receiving cavity; 6. Ceramic transition chamber; 7. Elastic copper mesh; 8. Thermal conductive layer. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0018] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0019] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0020] like Figure 1-2 As shown, a screw-type temperature sensor includes a probe body 1, a thin-film platinum resistance element 2, a wire 3, and an input / output interface 4. The thin-film platinum resistance element 2 is encapsulated inside the probe body 1. The thin-film platinum resistance element 2 is electrically connected to the input / output interface 4 via the wire 3. The probe body 1 has a receiving cavity 5 for placing the thin-film platinum resistance element 2. A ceramic transition chamber 6 and an elastic copper mesh 7 are filled between the thin-film platinum resistance element 2 and the inner wall of the receiving cavity 5. A thermally conductive layer 8 is filled between the thin-film platinum resistance element 2 and the ceramic transition chamber 6 to improve the temperature response speed.

[0021] The probe body 1 is made of screws; the elastic copper mesh 7 has a corrugated structure and is preferably 0.5 mm thick; the thermally conductive layer 8 is filled in the gaps of the elastic copper mesh 7 and is made of aluminum nitride thermal paste and silicon dioxide spheres with a particle size of 50 μm.

[0022] Specifically, the screw is machined to form a receiving cavity 5, the ceramic transition chamber 6 is placed in the receiving cavity 5, the thin film platinum resistance element 2 is placed in the ceramic transition chamber 6, and an elastic copper mesh 7 is filled between the thin film platinum resistance element 2 and the ceramic transition chamber 6, and then a thermally conductive layer 8 is filled. When filling the thermal conductive layer 8, aluminum nitride thermal paste mixed with silica spheres is injected into the gaps of the elastic copper mesh 7. After it cures, the thermal conductive layer 8 is formed. The silica spheres can ensure that the thermal conductive layer 8 and the elastic copper mesh 7 still have a certain degree of elasticity after curing.

[0023] In all the solutions mentioned above, although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw-type temperature sensor, characterized in that, It includes a probe body (1), a thin-film platinum resistance element (2), wires (3), and an input / output interface (4), wherein, The thin-film platinum resistance element (2) is encapsulated within the probe body (1). The thin-film platinum resistance element (2) is electrically connected to the input / output interface (4) via a wire (3). The probe body (1) is made of screws, and the probe body (1) has a receiving cavity (5) for placing the thin film platinum resistance element (2). A ceramic transition chamber (6) and an elastic copper mesh (7) are filled between the thin-film platinum resistance element (2) and the inner wall of the receiving cavity (5).

2. A screw-type temperature sensor according to claim 1, characterized in that, A thermally conductive layer (8) is filled between the thin-film platinum resistance element (2) and the ceramic transition chamber (6).

3. A screw-type temperature sensor according to claim 2, characterized in that, The thermally conductive layer (8) is formed by curing aluminum nitride thermal paste and silicon dioxide spheres.

4. A screw-type temperature sensor according to claim 2, characterized in that, The thermally conductive layer (8) fills the gaps in the elastic copper mesh (7).

5. A screw-type temperature sensor according to claim 1, characterized in that, The elastic copper mesh (7) is corrugated.

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