High-temperature-resistant signal transmission structure

Abstract

The utility model discloses a high-temperature-resistant signal transmission structure. The high-temperature-resistant signal transmission structure is composed of a thermocouple used for temperature measurement, a porcelain bead playing an insulating role and a bendable protective sleeve. The thermocouple is a platinum rhodium-platinum series precious metal thermocouple, a thermocouple sleeve is provided with a double-hole porcelain bead, the porcelain bead is mainly used for insulation and does not influence bending, and a protective sleeve is sleeved on the outermost layer and mainly has shielding and structural protection effects. The high-temperature-resistant signal transmission structure not only can ensure the insulation between the thermocouple and the protective sleeve, but also has certain bending shaping capability. The high-temperature-resistant signal transmission structure can resist the high temperature of 1700 DEG C at most and can be bent, and the defect that a conventional high-temperature structure can only conduct linear transmission is overcome; the structure can be used as a thermocouple high-temperature measurement assembly to be combined with other parts to form a high-temperature measurement sensor and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature thermocouple signal transmission, in particular to a high-temperature resistant signal transmission structure. Background Art

[0002] When measuring high temperature, it is usually necessary to arrange precious metal thermocouple measurement points at high temperature measurement points for temperature measurement, and the thermocouple signal needs to be transmitted to the back-end room temperature environment for processing. The conventional high temperature signal transmission structure currently used can only be transmitted in a straight transmission path. When the temperature is thousands of degrees Celsius and the signal transmission path is not short and straight, the conventional high temperature signal transmission structure cannot meet the working requirements. Utility Model Content

[0003] The utility model provides a high temperature resistant signal transmission structure, aiming to solve the above problems existing in the background technology.

[0004] The technical solutions provided by this utility model are as follows:

[0005] A high temperature resistant signal transmission structure, the high temperature resistant signal transmission structure is suitable for a straight transmission path and a curved path, and the high temperature resistant signal transmission structure is suitable for a working environment below 1700° C., comprising a thermocouple, a porcelain bead and a protective sleeve;

[0006] The protective sleeve is sleeved on the surface of the porcelain bead, a first gap exists between the inner wall of the protective sleeve and the outer surface of the porcelain bead, and a second gap exists between adjacent porcelain beads;

[0007] All the ceramic beads are provided with mounting holes along the axial direction, the thermocouples are fixed in the mounting holes, and the head and tail of the thermocouples pass through the ceramic beads provided at both ends of the protective sleeve and extend outward for a section;

[0008] When the signal transmission path is a curved path with a radius exceeding 20 mm, the protective sleeve is used to bend according to the signal transmission path.

[0009] Further, the porcelain beads include a first porcelain bead and a plurality of second porcelain beads, and the first porcelain bead is arranged at one end of the protective sleeve close to the head of the thermocouple;

[0010] The first ceramic bead comprises a T-shaped head and a body, the outer diameter of the T-shaped head is consistent with the outer diameter of the protective sleeve, and the outer diameter of the body matches the inner diameter of the protective sleeve, so that when the protective sleeve is sleeved on the surface of the body, the surface of the protective sleeve is flush with the surface of the T-shaped head;

[0011] A plurality of the second porcelain beads are coaxially arranged inside the protective sleeve with the first porcelain beads, and the end of the protective sleeve is flush with the second porcelain beads arranged at the outermost end.

[0012] Furthermore, the first porcelain bead and the second porcelain bead are both double-hole porcelain beads, and the first porcelain bead and the second porcelain bead are axially symmetrically provided with a first mounting hole and a second mounting hole of the same size.

[0013] Further, the main body of the thermocouple includes a first part and a second part respectively matching the first mounting hole and the second mounting hole, and the first part and the second part are integrated into one at the head of the thermocouple.

[0014] Furthermore, the surface of the protective sleeve is covered with an anti-oxidation coating.

[0015] Furthermore, the cross-sectional shape of the second ceramic bead along the axial direction includes a circle, a diamond, and an ellipse.

[0016] Furthermore, the thermocouple is a platinum-rhodium-platinum series precious metal thermocouple.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model provides a high temperature resistant signal transmission structure, which is composed of a thermocouple for temperature measurement, a ceramic bead for insulation, and a bendable protective sleeve. The thermocouple is a platinum-rhodium-platinum series precious metal thermocouple, and the thermocouple sleeve is provided with a double-hole ceramic bead, which mainly serves as insulation and does not affect the bending shape. The outermost sleeve is a protective sleeve, which mainly serves as shielding and structural protection. The high temperature resistant signal transmission structure can not only ensure the insulation between the thermocouple and the protective sleeve, but also has a certain bending and shaping ability. The high temperature resistant signal transmission structure can withstand a maximum temperature of 1700°C. The structure can be bent to solve the shortcoming that conventional high temperature structures can only transmit in a straight line; the structure can be used as a thermocouple high temperature measurement component and combined with other components to form a high temperature measurement sensor, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the high temperature resistant signal transmission structure in the embodiment of the utility model;

[0020] Figure 2 It is a cross-sectional view of the first ceramic bead along the radial direction in the embodiment of the utility model;

[0021] Figure 3 It is a cross-sectional view of the first ceramic bead along the axial direction in the embodiment of the utility model.

[0022] The reference numerals are as follows:

[0023] 1-thermocouple, 101-first part, 102-second part, 2-porcelain bead, 201-first porcelain bead, 2011-first mounting hole, 2012-second mounting hole, 202-second porcelain bead, 3-protective sleeve. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the embodiments described below are part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the detailed description of the embodiments of the present application provided below in conjunction with the accompanying drawings is intended to represent only selected embodiments of the present application, and is not intended to limit the scope of protection claimed in the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present application.

[0026] It should be understood that in the description of the embodiments of the present utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0027] In the description of the embodiments of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0028] See also Figure 1 The utility model provides a high temperature resistant signal transmission structure, which is suitable for straight transmission paths and curved paths, and is suitable for working environments below 1700°C, and includes a thermocouple 1, a porcelain bead 2 and a protective sleeve 3.

[0029] The protective sleeve 3 is sleeved on the surface of the ceramic bead 2, and there is a first gap between the inner wall of the protective sleeve 3 and the outer surface of the ceramic bead 2, and there is a second gap between adjacent ceramic beads 2. Due to the existence of the first gap and the second gap, the high temperature resistant signal transmission structure can adapt to a curved path.

[0030] All the ceramic beads 2 are provided with mounting holes along the axial direction, the thermocouple 1 is fixed in the mounting hole, and the head and tail of the thermocouple 1 pass through the ceramic beads 2 provided at both ends of the protective sleeve 3 and extend outward for a section. The head extending outward is used to measure the temperature of the measuring point, and the outer part extending outward is used to transmit the measurement signal. The shape and thickness of the ceramic bead 2 and the first gap with the protective sleeve 3 can be designed and determined according to the bending radius.

[0031] When the signal transmission path is a curved path with a radius exceeding 20 mm, the protective sleeve 3 can be bent according to the signal transmission path.

[0032] Optionally, the ceramic bead 2 includes a first ceramic bead 201 and a plurality of second ceramic beads 202 , and the first ceramic bead 201 is disposed at one end of the protective sleeve 3 close to the head of the thermocouple 1 .

[0033] The first ceramic bead 201 includes a T-shaped head and a body. The outer diameter of the T-shaped head is consistent with the outer diameter of the protection sleeve 3. The outer diameter of the body matches the inner diameter of the protection sleeve 3. When the protection sleeve 3 is sleeved on the surface of the body, the surface of the protection sleeve 3 is flush with the surface of the T-shaped head.

[0034] The plurality of second ceramic beads 202 are coaxially arranged inside the protective sleeve 3 with the first ceramic beads 201 , and the end of the protective sleeve 3 is flush with the second ceramic beads 202 arranged at the outermost end.

[0035] Optionally, the first ceramic bead 201 and the second ceramic bead 202 are both double-hole ceramic beads, and the first ceramic bead 201 and the second ceramic bead 202 are axially symmetrically provided with a first mounting hole 2011 and a second mounting hole 2012 of the same size. Figure 2 The cross section of the second ceramic bead 202 along the radial direction is the same as the cross section of the first ceramic bead 201 along the radial direction.

[0036] In this embodiment, the thickness of the second porcelain bead 202 is 1mm, the outer diameter is φ2.3mm, and the double hole is φ0.55mm. The first porcelain bead 201 and the second porcelain bead 202 are both made of 95 porcelain, and the outer diameter of the second porcelain bead 202 is smaller than the inner diameter of the protective sleeve 3. A certain gap is left between the two, which is the first gap. The protective sleeve 3 is made of Nb521 pipe with a diameter of φ3mm×0.25mm. When the bending shape R>20mm of the protective sleeve 3, since the insulating layer is composed of porcelain beads 2 and there is a first gap between the protective sleeve 3, it can be bent to adapt to the working environment of the curved path.

[0037] Optionally, the main body of the thermocouple 1 includes a first part 101 and a second part 102 respectively matching the first mounting hole 2011 and the second mounting hole 2012 , and the first part 101 and the second part 102 are integrated into one at the head of the thermocouple 2 .

[0038] Optionally, the protective sleeve 3 is resistant to high temperatures and has plasticity, and when the protective sleeve 3 is made of refractory metals such as niobium and tantalum, it needs to be treated with an anti-oxidation coating. For example, the protective sleeve 3 made of materials such as high-temperature alloys and metal platinum does not need to be treated with an anti-oxidation coating.

[0039] See also Figure 3 The cross-sectional shape of the second ceramic bead 202 along the axial direction includes a circle, a diamond, and an ellipse.

[0040] Optionally, the thermocouple 1 is a platinum-rhodium-platinum series precious metal thermocouple, and the wire diameter of the thermocouple 1 is φ0.5 mm.

[0041] In other embodiments, the protective sleeve 3 may also be made of other metals, such as niobium alloys and tantalum alloys or precious metal platinum, which are resistant to high temperatures and have plasticity. The thermocouple 1 may be selected from other types of thermocouples according to the use temperature.

[0042] In summary, the utility model provides a high temperature resistant signal transmission structure, which is composed of a thermocouple 1 for temperature measurement, a ceramic bead 2 for insulation, and a bendable protective sleeve 3. The thermocouple 1 is a platinum-rhodium-platinum series precious metal thermocouple. The thermocouple 1 is provided with a double-hole ceramic bead 2. The ceramic bead 2 mainly serves as insulation and does not affect the bending shape. The outermost layer is a protective sleeve 3. The protective sleeve 3 mainly serves as shielding and structural protection. The high temperature resistant signal transmission structure can not only ensure the required insulation between the thermocouple 1 and the protective sleeve 3, but also has a certain bending and shaping ability. The high temperature resistant signal transmission structure can withstand a maximum temperature of 1700°C. The structure can be bent to solve the shortcoming that conventional high temperature structures can only transmit in a straight line; the structure can also be used as a thermocouple high temperature measurement component and combined with other components to form a high temperature measurement sensor.

[0043] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A high temperature resistant signal transmission structure, which is suitable for a straight transmission path and a curved path, and is suitable for a working environment below 1700°C, characterized in that: Including thermocouple, porcelain beads and protective sleeve; The protective sleeve is sleeved on the surface of the porcelain bead, a first gap exists between the inner wall of the protective sleeve and the outer surface of the porcelain bead, and a second gap exists between adjacent porcelain beads; All the ceramic beads are provided with mounting holes along the axial direction, the thermocouples are fixed in the mounting holes, and the head and tail of the thermocouples pass through the ceramic beads provided at both ends of the protective sleeve and extend outward for a section; When the signal transmission path is a curved path with a radius exceeding 20 mm, the protective sleeve is used to bend according to the signal transmission path.

2. The high temperature resistant signal transmission structure according to claim 1, characterized in that: The ceramic beads include a first ceramic bead and a plurality of second ceramic beads, wherein the first ceramic bead is arranged at one end of the protective sleeve close to the head of the thermocouple; The first ceramic bead comprises a T-shaped head and a body, the outer diameter of the T-shaped head is consistent with the outer diameter of the protective sleeve, and the outer diameter of the body matches the inner diameter of the protective sleeve, so that when the protective sleeve is sleeved on the surface of the body, the surface of the protective sleeve is flush with the surface of the T-shaped head; A plurality of the second porcelain beads are coaxially arranged inside the protective sleeve with the first porcelain beads, and the end of the protective sleeve is flush with the second porcelain beads arranged at the outermost end.

3. The high temperature resistant signal transmission structure according to claim 2, characterized in that: The first porcelain bead and the second porcelain bead are both double-hole porcelain beads, and the first porcelain bead and the second porcelain bead are axially symmetrically provided with a first mounting hole and a second mounting hole of the same size.

4. The high temperature resistant signal transmission structure according to claim 3, characterized in that: The main body of the thermocouple includes a first part and a second part respectively matched with the first mounting hole and the second mounting hole, and the first part and the second part are integrated into one at the head of the thermocouple.

5. The high temperature resistant signal transmission structure according to any one of claims 1 to 4, characterized in that: The surface of the protective sleeve is covered with an anti-oxidation coating.

6. The high temperature resistant signal transmission structure according to any one of claims 2 to 4, characterized in that: The cross-sectional shape of the second ceramic bead along the axial direction includes a circle, a diamond, and an ellipse.

7. The high temperature resistant signal transmission structure according to claim 5, characterized in that: The thermocouple is a platinum-rhodium-platinum series precious metal thermocouple.

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