A ferrofluorine high temperature temperature measuring line

Abstract

The utility model relates to temperature measurement line technical field, concretely is a kind of teflon high temperature temperature measurement line, including temperature measurement core line, the outside of temperature measurement core line is provided with inner insulating layer, the outside of inner insulating layer is provided with heat insulating layer, the inside of heat insulating layer is provided with heat insulation cavity, heat insulation assembly is provided in heat insulation cavity, heat insulation assembly includes the composite spiral skeleton of being arranged in heat insulation cavity, the composite spiral skeleton is made of flexible high-temperature-resistant fiber matrix.The utility model discloses, by the setting of heat insulation assembly, constitute a high thermal resistance, high insulation composite barrier layer, and by the setting of multiple insulation assemblies, the originally radial straight-through, shorter air gap insulation path is transformed into a "labyrinth" path along axial zigzag, increase effective creepage distance, effectively suppress and extinguish arc, make the partial discharge inception voltage and breakdown voltage of cable be extremely significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of temperature measuring wire technology, and in particular to a Teflon high-temperature temperature measuring wire. Background Technology

[0002] In industrial production, especially in high-temperature environments such as metallurgy, ceramics, and glass furnaces, accurate and reliable temperature measurement is crucial. The temperature sensing wire, as a key component connecting the temperature sensor and the display and control instrument, directly affects the stability and accuracy of the temperature measurement system.

[0003] A high-temperature resistant temperature measuring wire with authorized publication number CN222072205U relates to the field of temperature measuring wire technology. It includes a wire body and a temperature measuring head. The wire body has a high-temperature resistant sleeve on its outer side, and a connector is fixedly connected to the lower end of the wire body. A connecting sleeve is fitted onto the outer side of the high-temperature resistant sleeve. A plug is fixedly connected to the lower end of the connector. A conductive block is slidably connected to the lower end of the plug. A movable plate is fixedly installed inside the plug at the upper end of the conductive block. A conductor wire is provided inside the plug, and the lower end of the conductor wire passes through the movable plate and the conductive block for fixed connection. This invention uses the above structure to easily and quickly connect the wire body and the temperature measuring head by inserting the plug at the connector at the lower end of the wire body into the power socket on the temperature measuring head, and then using the connecting sleeve on the outer side of the high-temperature resistant sleeve and the external threaded sleeve with a limit ring on the upper end of the temperature measuring head for threaded installation. This facilitates disassembly and replacement during subsequent use.

[0004] Regarding the aforementioned technologies, the existing high-temperature measuring wires have the following drawbacks: common high-temperature measuring wires typically use fiberglass braided outer sheaths or single polytetrafluoroethylene (PTFE) as insulation and sheathing materials. Although these materials have a certain degree of heat resistance, they still have significant defects when subjected to extreme high-temperature environments above 250°C for extended periods. Ordinary Teflon-insulated wires may age and crack after long-term use at high temperatures, losing their insulation and protective function. Therefore, this utility model provides a Teflon high-temperature measuring wire. Utility Model Content

[0005] The purpose of this application is to provide a Teflon high-temperature measuring wire to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution: a Teflon high-temperature measuring wire, comprising a measuring core wire, an inner insulation layer disposed on the outer side of the measuring core wire, a heat insulation layer disposed on the outer side of the inner insulation layer, a heat insulation cavity formed on the inner side of the heat insulation layer, and a heat insulation component disposed within the heat insulation cavity.

[0007] Preferably, the thermal insulation component includes a composite spiral skeleton disposed within the thermal insulation cavity. The composite spiral skeleton is composed of a flexible high-temperature resistant fiber matrix. The interior or surface of the composite spiral skeleton contains nanoporous thermal insulation material. The composite spiral skeleton is made of an alumina fiber braided tube impregnated with silica aerogel.

[0008] Preferably, the heat insulation cavity is provided with multiple sets of insulating components; the insulating components include a first insulating partition and a second insulating partition respectively connected to the inner walls on both sides of the heat insulation cavity, the first insulating partition and the second insulating partition are arranged alternately in the radial direction and do not contact each other.

[0009] Preferably, a shielding layer is provided on the outside of the heat insulation layer, and an outer insulating layer is provided on the outside of the shielding layer.

[0010] Preferably, the outer insulation layer is a dense Teflon material layer, and an outer sheath is provided on the outside of the outer insulation layer.

[0011] Preferably, the outer sheath is a high-temperature glass fiber braided layer, and a high-temperature resistant tensile braided layer is provided between the outer insulation layer and the outer sheath. The high-temperature resistant tensile braided layer is woven from aramid fiber filaments.

[0012] In summary, the technical effects and advantages of this utility model are as follows: In this invention, a composite barrier layer with high heat resistance and high insulation is formed by setting up heat insulation components. Furthermore, by setting up multiple sets of insulation components, the original radially straight and relatively short air gap insulation path is transformed into a tortuous "maze-like" path along the axial direction, which increases the effective creepage distance, effectively suppresses and extinguishes the electric arc, and significantly improves the partial discharge initiation voltage and breakdown voltage of the cable. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a first-view axial side view of the structure of this utility model; Figure 2 This is a schematic diagram of the second-view axial side structure of the present invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of section B in the middle.

[0015] In the diagram: 1. Temperature sensing core wire; 2. Inner insulation layer; 3. Heat insulation layer; 4. Heat insulation cavity; 5. Shielding layer; 6. Outer insulation layer; 7. Outer sheath; 8. First insulating partition; 9. Second insulating partition; 10. Composite spiral skeleton. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0018] Example: Reference Figure 1-4The illustrated Teflon high-temperature measuring wire includes a measuring core wire 1, which senses and transmits the temperature signal of the object being measured and is the core component for achieving the temperature measurement function. An inner insulation layer 2 is provided on the outer side of the measuring core wire 1. The inner insulation layer 2 prevents leakage or signal interference between the measuring core wire 1 and external components, ensuring the accuracy of temperature signal transmission. A heat insulation layer 3 is provided on the outer side of the inner insulation layer 2. The heat insulation layer 3 blocks the transmission of external high temperatures to the internal core component, providing a stable low-temperature operating environment for the measuring core wire 1. A heat insulation cavity 4 is formed on the inner side of the heat insulation layer 3. The heat insulation cavity 4 can further enhance the heat insulation effect through an air layer, reducing the heat conduction area. The insulation cavity 4 is equipped with an insulation component. The insulation component includes a composite spiral skeleton 10 installed inside the insulation cavity 4. The composite spiral skeleton 10 is made of a flexible high-temperature resistant fiber matrix, which ensures both the flexibility of the temperature measuring wire and high-temperature resistance. The composite spiral skeleton 10 contains nanoporous insulation material inside or on its surface, which can significantly reduce heat conduction efficiency and enhance insulation performance. The composite spiral skeleton 10 is made of alumina fiber braided tube impregnated with silica aerogel, which further improves its high-temperature stability and insulation effect. The insulation cavity 4 is equipped with multiple sets of insulation components. The insulation components include a first insulating partition 8 and a second insulating partition 9 connected to the inner walls on both sides of the insulation cavity 4, respectively. The first insulating partition 8 and the second insulating partition 9 are arranged in a staggered manner in the radial direction and do not contact each other, which can enhance the insulation performance of the insulation cavity 4 and block the heat transfer path through the staggered structure, thereby improving the overall insulation effect. A shielding layer 5 is installed on the outside of the insulation layer 3. The shielding layer 5 can isolate external electromagnetic interference and ensure stable transmission of temperature signals. An outer insulation layer 6 is provided on the outside of the shielding layer 5. The outer insulation layer 6 is a dense Teflon material layer. Teflon has excellent high-temperature resistance and chemical corrosion resistance, and also provides good insulation protection. An outer sheath 7 is provided on the outside of the outer insulation layer 6. The outer sheath 7 is a high-temperature glass fiber braided layer, which can enhance the wear resistance and scratch resistance of the temperature measuring wire and protect the internal structure from external damage. A high-temperature tensile braided layer is provided between the outer insulation layer 6 and the outer sheath 7. The high-temperature tensile braided layer is woven from aramid fiber filaments, which can significantly improve the overall tensile strength of the temperature measuring wire and prevent damage caused by stretching during installation or use.

[0019] The working principle of this utility model is as follows: The composite spiral skeleton 10 is filled with a soft, blocky or flocculent nanoporous thermal insulation material (such as silica aerogel felt). This filling material is in physical contact with the composite spiral skeleton 10, together forming a composite barrier layer with high thermal resistance and high insulation. The arrangement of multiple sets of insulation components transforms the original radially straight and relatively short air gap insulation path into a tortuous "maze-like" path along the axial direction. Any possible surface discharge or leakage current must bypass the edges of multiple sets of insulation components and pass through the narrow radial gap, increasing the effective creepage distance and effectively suppressing and extinguishing the arc, thereby significantly improving the partial discharge initiation voltage and breakdown voltage of the cable.

[0020] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A Teflon high-temperature measuring wire, comprising a measuring core wire (1), characterized in that: The outer side of the temperature measuring core wire (1) is provided with an inner insulation layer (2), the outer side of the inner insulation layer (2) is provided with a heat insulation layer (3), the inner side of the heat insulation layer (3) is provided with a heat insulation cavity (4), and the heat insulation cavity (4) is provided with a heat insulation component.

2. The Teflon high-temperature measuring wire according to claim 1, characterized in that: The insulation component includes a composite spiral skeleton (10) disposed in the insulation cavity (4). The composite spiral skeleton (10) is composed of a flexible high-temperature resistant fiber matrix. The interior or surface of the composite spiral skeleton (10) contains nanoporous insulation material. The material of the composite spiral skeleton (10) is an alumina fiber braided tube impregnated with silica aerogel.

3. The Teflon high-temperature measuring wire according to claim 2, characterized in that: The heat insulation cavity (4) is provided with multiple sets of insulation components; the insulation components include a first insulation partition (8) and a second insulation partition (9) respectively connected to the inner walls on both sides of the heat insulation cavity (4), the first insulation partition (8) and the second insulation partition (9) are arranged alternately in the radial direction and do not contact each other.

4. The Teflon high-temperature measuring wire according to claim 1, characterized in that: A shielding layer (5) is provided on the outside of the heat insulation layer (3), and an outer insulation layer (6) is provided on the outside of the shielding layer (5).

5. The Teflon high-temperature measuring wire according to claim 4, characterized in that: The outer insulation layer (6) is a dense Teflon material layer, and an outer sheath (7) is provided on the outside of the outer insulation layer (6).

6. The Teflon high-temperature measuring wire according to claim 5, characterized in that: The outer sheath (7) is a high-temperature glass fiber braided layer. A high-temperature resistant tensile braided layer is provided between the outer insulation layer (6) and the outer sheath (7). The high-temperature resistant tensile braided layer is woven from aramid fiber filaments.

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