Thermocouple

Abstract

The invention relates to the technical field of temperature measurement, and provides a thermocouple, which comprises a thermocouple main body, and a temperature measurement conductive end is arranged on the thermocouple main body. A temperature measuring contact piece is arranged on the temperature measuring conductive end of the thermocouple main body, a shielding piece is arranged between the temperature measuring contact piece and the temperature measuring conductive end, the shielding piece is sleeved on the outer side of the temperature measuring conductive end, and the temperature measuring contact piece is sleeved on the outer side of the shielding piece; one end of the temperature measuring contact member indirectly or directly abuts against the object to be measured, and the other end of the temperature measuring contact member is in sealing fit with the thermocouple main body. The shielding piece is arranged between the temperature measurement conductive end of the thermocouple main body and the temperature measurement contact piece, and the shielding piece has a certain electromagnetic wave shielding effect, so that the temperature measurement conductive end of the thermocouple is ensured not to have an electromagnetic interference phenomenon during working, and the temperature measurement of the thermocouple is accurate.

Description

Technical Field

[0001] The invention relates to the technical field of temperature measurement, and in particular to a thermocouple. Background Art

[0002] Thermocouple is a commonly used temperature measuring element in temperature measuring instruments. It directly measures temperature and converts the temperature signal into a thermoelectric potential signal, which is then converted into the temperature of the measured medium through an electrical instrument (secondary instrument). Chinese Patent No. ZL202320272289.7 discloses a spring-pressed surface thermocouple, including a junction box and a thermocouple body; a protective tube is provided on the thermocouple body; the temperature measuring end of the thermocouple body is connected to a spring pressing mechanism; the spring pressing mechanism includes a threaded sleeve and an elastic member; the threaded sleeve is installed on the outer periphery of the protective tube; the elastic member is sleeved on the outer periphery of the protective tube and is located between the threaded sleeve and the temperature measuring end. Thermocouples need to measure temperature accurately, so it is necessary to avoid interference when measuring temperature with thermocouples. Summary of the invention

[0003] The present invention proposes a thermocouple, in which a shielding member is provided between the temperature measuring conductive end of the thermocouple body and the temperature measuring contact member. The shielding member has a certain function of shielding electromagnetic waves, ensuring that the temperature measuring conductive end of the thermocouple is free of electromagnetic interference during operation, thereby enabling the thermocouple to measure temperature accurately.

[0004] A thermocouple designed for this purpose includes a thermocouple body, on which a temperature measuring conductive end is provided; a temperature measuring contact piece is provided on the temperature measuring conductive end of the thermocouple body, a shielding piece is provided between the temperature measuring contact piece and the temperature measuring conductive end, the shielding piece is sleeved on the outside of the temperature measuring conductive end, and the temperature measuring contact piece is sleeved on the outside of the shielding piece; one end of the temperature measuring contact piece is indirectly or directly abutted against an object to be measured, and a sealing fit is formed between the other end of the temperature measuring contact piece and the thermocouple body.

[0005] The shielding member is made of non-metallic material, and the shielding member forms an insulating member between the temperature measuring contact member and the temperature measuring conductive end. The temperature measuring contact member is arranged at a distance from the temperature measuring conductive end through the shielding member, so that a non-conductive indirect contact is formed between the temperature measuring contact member and the temperature measuring conductive end. Alternatively, the shielding member includes an insulating shielding member and a metal shielding member, the metal shielding member is sleeved on the outside of the temperature measuring conductive end, the insulating shielding member is sleeved on the outside of the metal shielding member, and the temperature measuring contact member is sleeved on the outside of the insulating shielding member.

[0006] The insulating shielding component is provided with a accommodating cavity for inserting the temperature measuring conductive end, the accommodating cavity passes through the inner cavity of the insulating shielding component, one end of the insulating shielding component abuts against the thermocouple body, and the other end surface of the insulating shielding component is higher than the top position of the temperature measuring conductive end to block the inner side of the temperature measuring contact component from contacting the temperature measuring conductive end.

[0007] The material of the temperature measuring contact piece is a high-temperature resistant metal material, the front end of the temperature measuring contact piece is a sealed end and is indirectly or directly in contact with the object to be measured; a flat section is provided at the rear position of the temperature measuring contact piece, and the inner side of the end of the flat section is pressed and in contact with the outer side of the thermocouple body, so that a sealed fit is formed between the end position of the temperature measuring contact piece and the thermocouple body.

[0008] The thermocouple body is provided with an elastic anti-detachment component corresponding to the object to be measured. The elastic anti-detachment component includes an elastic member spirally wound on the outside of the thermocouple body and the temperature measuring contact member. The temperature measuring contact member forms an indirect or direct elastic abutment on the object to be measured under the elastic action of the elastic member.

[0009] The elastic anti-detachment component also includes an anti-detachment buckle part, the elastic part is a spring, the anti-detachment buckle part is provided with a through hole passing through the elastic part, the anti-detachment buckle part and the elastic part are both sleeved on the outside of the thermocouple body, and the elastic part passing through the through hole is spirally wound on the outside of the thermocouple body and the temperature measuring contact part; the outer diameter of the part of the elastic part passing through the through hole is larger than the inner diameter of the through hole, so that the part of the elastic part passing through the through hole abuts against the inner side of the through hole, and one end of the elastic part is connected to the temperature measuring contact part of the thermocouple body.

[0010] The object to be measured is provided with an anti-detachment fitting, which is connected to the anti-detachment buckle fitting to form an anti-detachment structure that prevents the temperature measuring contact piece of the thermocouple body from detaching from the object to be measured.

[0011] A detachable connecting buckle portion is provided between the anti-drop buckle piece and the anti-drop matching piece; The detachable connection buckle part comprises a clamping groove arranged on the anti-dropping buckle part and a buckling column arranged on the anti-dropping matching part, the anti-dropping buckle part is provided with a guide groove, an anti-dropping block is arranged between one end of the guide groove and the clamping groove, and the other end of the guide groove is connected with the clamping groove; When the anti-dropout fitting is assembled with the anti-dropout buckling piece, the anti-dropout fitting is relatively inserted into the anti-dropout buckling piece, and the buckling column is limited in the guide groove. After the anti-dropout fitting is inserted into the corresponding position, the buckling column follows the anti-dropout fitting to rotate to the position of the corresponding slot, and the anti-dropout fitting drives the buckling column to move in the direction close to the anti-dropout block into the slot, and the buckling column is limited between the anti-dropout block and the inner side of the slot. When the anti-dropout fitting is separated from the anti-dropout snap-fitting part, the snap-fitting column moves out of the slot in a direction away from the anti-dropout block. After the anti-dropout block rotates to the position corresponding to the guide groove following the anti-dropout fitting, the snap-fitting column of the anti-dropout fitting axially disengages from the guide groove to realize a detachable connection between the anti-dropout snap-fitting part and the anti-dropout fitting.

[0012] The thermocouple body includes a first conductive member and a second conductive member, one end of the first conductive member is connected to one end of the second conductive member to form a temperature measuring conductive end, and an insulating sleeve is provided on the outer side of the first conductive member and the second conductive member corresponding to the rear of the temperature measuring conductive end; the thermocouple body also includes a metal sleeve sleeved on the outer side of the insulating sleeve, the insulating sleeves of the first conductive member and the second conductive member are inserted into the metal sleeve, and the metal sleeve forms a non-conductive indirect contact with each conductive member through the insulating sleeve, and the other end of the temperature measuring contact member is flattened on the outer side of the metal sleeve of the thermocouple body.

[0013] The other ends of the first conductive member and the second conductive member are provided with power terminals for connecting to the circuit board, and each power terminal is correspondingly provided with an insulating rubber sleeve for encapsulating the conductive member, and an insulating rubber layer is provided between the insulating rubber sleeve and the end position of the metal sleeve, and the insulating rubber layer wraps the end position of the metal sleeve and the head end position of the insulating rubber sleeve, so that the metal sleeve forms a non-conductive indirect contact with the power terminal through the insulating rubber sleeve, and the insulating rubber sleeve is connected to the metal sleeve through the insulating rubber layer.

[0014] The beneficial technical effects of the present invention are as follows: By providing a shielding member between the temperature measuring conductive end of the thermocouple body and the temperature measuring contact member, the shielding member has a certain shielding effect of electromagnetic waves, ensuring that the temperature measuring conductive end of the thermocouple is free of electromagnetic interference during operation, so that the thermocouple can measure temperature accurately.

[0015] The shielding member is made of non-metallic material, and forms an insulating member between the temperature measuring contact member and the temperature measuring conductive end. The temperature measuring contact member is spaced apart from the temperature measuring conductive end by the shielding member, so that non-conductive indirect contact is formed between the temperature measuring contact member and the temperature measuring conductive end. Since the temperature measuring contact member is made of metal material and the shielding member is made of non-metallic conductive material, the temperature measuring conductive end can be isolated on the inner side of the temperature measuring contact member to avoid conductive contact between the temperature measuring conductive end and the temperature measuring contact member.

[0016] The shielding member includes an insulating shielding member and a metal shielding member, forming a double shielding layer, ensuring that the temperature measuring conductive end of the thermocouple is free from electromagnetic interference during operation, so that the thermocouple can measure temperature accurately. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a thermocouple according to an embodiment of the present invention.

[0019] Figure 2 The figure is a schematic diagram of the exploded structure of the thermocouple and the anti-detachment fitting assembly according to one embodiment of the present invention.

[0020] Figure 3The figure is a schematic diagram of the pre-assembly structure of a thermocouple and an anti-detachment fitting according to an embodiment of the present invention.

[0021] Figure 4 The figure is a schematic diagram of the structure after the thermocouple and the anti-drop fitting are assembled according to one embodiment of the present invention.

[0022] Figure 5 FIG. 1 is a schematic structural diagram of a metal shielding member according to an embodiment of the present invention.

[0023] Figure 6 It is a schematic structural diagram of an insulating shielding member according to an embodiment of the present invention.

[0024] Figure 7 The figure is a schematic diagram of the three-dimensional structure of an anti-dropping fastener according to an embodiment of the present invention.

[0025] Figure 8 It is a schematic diagram of the three-dimensional structure of an anti-dropping fastener in another aspect of an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0027] See also Figure 1-Figure 8 A thermocouple comprises a thermocouple body 1, on which a temperature measuring conductive end 2 is provided; a temperature measuring contact piece 3 is provided on the temperature measuring conductive end 2 of the thermocouple body 1, a shielding piece 4 is provided between the temperature measuring contact piece 3 and the temperature measuring conductive end 2, the shielding piece 4 is sleeved on the outside of the temperature measuring conductive end 2, and the temperature measuring contact piece 3 is sleeved on the outside of the shielding piece 4; one end of the temperature measuring contact piece 3 is indirectly or directly abutted against an object to be measured, and a sealing fit is formed between the other end of the temperature measuring contact piece 3 and the thermocouple body 1.

[0028] The shielding member 4 is made of non-metallic material, and forms an insulating member between the temperature measuring contact member 3 and the temperature measuring conductive end 2. The temperature measuring contact member 3 is spaced apart from the temperature measuring conductive end 2 by the shielding member 4, so that non-conductive indirect contact is formed between the temperature measuring contact member 3 and the temperature measuring conductive end 2.

[0029] Alternatively, the shielding member 4 includes an insulating shielding member and a metal shielding member 24 , the metal shielding member 24 is sleeved on the outside of the temperature measuring conductive end 2 , the insulating shielding member is sleeved on the outside of the metal shielding member 24 , and the temperature measuring contact member 3 is sleeved on the outside of the insulating shielding member.

[0030] In this embodiment, the insulating shielding member is made of ceramic material, which has a certain effect of shielding electromagnetic waves. The principle is that when electromagnetic waves generate current on the surface of the material, part of the energy is absorbed by the material, thereby reducing the radiation of the electromagnetic waves. The high density, low dielectric constant and low conductivity of ceramics enable it to more effectively block the propagation of electromagnetic waves.

[0031] In this embodiment, the metal shielding member 24 is a metal mesh. The main reason why the metal mesh can be used as a shielding cover is that it can effectively reflect and absorb electromagnetic waves, thereby shielding external electromagnetic interference. Metal materials have good electrical conductivity and electromagnetic wave reflection characteristics, which enables metal shielding devices to build a solid line of defense for electromagnetic safety. When electromagnetic waves encounter a metal shielding layer, most of the electromagnetic waves will be reflected back, and only a very small part will penetrate the shielding layer or be absorbed on the surface. This reflection and absorption effect forms a shield that can shield electromagnetic wave interference, protecting the internal electronic equipment or system from interference from external electromagnetic waves.

[0032] In this embodiment, the metal shielding member 24 is fixed on the inner cavity of the insulating shielding member, and there is a gap between the metal shielding member 24 and the temperature measuring conductive end 2, which can effectively avoid contact between the two.

[0033] In this embodiment, the metal shielding member 24 can be fixed to the inner cavity of the insulating shielding member by gluing.

[0034] The insulating shielding component is provided with a receiving cavity 5 for inserting the temperature measuring conductive end 2, the receiving cavity 5 passes through the inner cavity of the insulating shielding component, one end of the insulating shielding component abuts against the thermocouple body 1, and the other end surface of the insulating shielding component is higher than the top position of the temperature measuring conductive end 2 to block the inner side of the temperature measuring contact component 3 from contacting the temperature measuring conductive end 2.

[0035] The material of the temperature measuring contact piece 3 is a high temperature resistant metal material, the front end of the temperature measuring contact piece 3 is a sealed end and is indirectly or directly abutted against the object to be measured; a flat section 6 is provided at the rear position of the temperature measuring contact piece 3, and the inner side of the end of the flat section 6 is pressed against the outer side of the thermocouple body 1, so that a sealed fit is formed between the end position of the temperature measuring contact piece 3 and the thermocouple body 1. The flat section 6 is pressed against the outer side of the thermocouple body 1, which prevents the temperature measuring contact piece 3 from detaching from the thermocouple body 1 at will on the one hand, and forms a sealed fit between the end position of the temperature measuring contact piece 3 and the thermocouple body 1 on the other hand, preventing external water vapor from entering between the outer side of the thermocouple body 1 and the temperature measuring contact piece 3.

[0036] In this embodiment, a high temperature resistant seal may be provided between the end of the flat segment 6 and the outside of the thermocouple body 1 to further improve the sealing fit between the end of the temperature measuring contact piece 3 and the thermocouple body 1 .

[0037] The thermocouple body 1 is provided with an elastic anti-detachment component 7 corresponding to the object to be measured, and the elastic anti-detachment component 7 includes an elastic member 8 spirally wound on the outer side of the thermocouple body 1 and the temperature measuring contact member 3. The temperature measuring contact member 3 is elastically abutted against the object to be measured indirectly or directly under the elastic action of the elastic member 8, ensuring that the temperature measuring contact member 3 and the object to be measured can effectively contact each other.

[0038] The elastic anti-detachment component 7 also includes an anti-detachment fastening member 9, the elastic member 8 is a spring, and the anti-detachment fastening member 9 is provided with a through hole 10 passing through the elastic member 8. The anti-detachment fastening member 9 and the elastic member 8 are both sleeved on the outside of the thermocouple body 1, and the part of the elastic member 8 passing through the through hole 10 is spirally wound on the outside of the thermocouple body 1 and the temperature measuring contact member 3; the outer diameter of the part of the elastic member 8 passing through the through hole 10 is larger than the inner diameter of the through hole 10, so that the part of the elastic member 8 passing through the through hole 10 abuts against the inner side of the through hole 10, and one end of the elastic member 8 is connected to the temperature measuring contact member 3 of the thermocouple body 1.

[0039] The object to be measured is provided with an anti-detachment fitting 11, which is connected to the anti-detachment snap-fitting fitting 9 to form an anti-detachment structure that prevents the temperature measuring contact piece 3 of the thermocouple body 1 from detaching from the object to be measured, thereby preventing the temperature measuring contact piece 3 of the thermocouple body 1 from detaching from the object to be measured at will, and ensuring that the temperature measuring contact piece 3 and the object to be measured can effectively contact each other.

[0040] A detachable connecting buckle portion 12 is provided between the anti-dropping buckle piece 9 and the anti-dropping matching piece 11; The detachable connection buckle part 12 includes a clamping groove 13 provided on the anti-dropping buckle part 9 and a buckling column 14 provided on the anti-dropping matching part 11. The anti-dropping buckle part 9 is provided with a guide groove 15. An anti-dropping block 16 is provided between one end of the guide groove 15 and the clamping groove 13. The other end of the guide groove 15 is connected to the clamping groove 13. When the anti-dropout fitting 11 is assembled with the anti-dropout buckle 9, the anti-dropout fitting 11 is inserted into the anti-dropout buckle 9, and the buckle column 14 is limited in the guide groove 15. After the anti-dropout fitting 11 is inserted into the corresponding position, the buckle column 14 follows the anti-dropout fitting 11 to rotate to the position corresponding to the card slot 13, and the anti-dropout fitting 11 drives the buckle column 14 to move into the card slot 13 in the direction close to the anti-dropout block 16, and the buckle column 14 is limited between the anti-dropout block 16 and the inner side of the card slot 13; When the anti-dropout fitting 11 is separated from the anti-dropout snap fitting 9, the snapping column 14 moves to the outside of the slot 13 in a direction away from the anti-dropout block 16. After the anti-dropout block 16 rotates to the position corresponding to the guide groove 15 following the anti-dropout fitting 11, the snapping column 14 of the anti-dropout fitting 11 axially disengages from the guide groove 15 to realize a detachable connection between the anti-dropout snap fitting 9 and the anti-dropout fitting 11.

[0041] The thermocouple body 1 includes a first conductive member 17 and a second conductive member 18, one end of the first conductive member 17 is connected to one end of the second conductive member 18 to form a temperature measuring conductive end 2, and an insulating sleeve 19 is provided on the outer side of the first conductive member 17 and the second conductive member 18 corresponding to the rear of the temperature measuring conductive end 2; the thermocouple body 1 also includes a metal sleeve 20 sleeved on the outer side of the insulating sleeve 19, the insulating sleeves 19 of the first conductive member 17 and the second conductive member 18 are inserted into the metal sleeve 20, and the metal sleeve 20 forms a non-conductive indirect contact with each conductive member through the insulating sleeve 19, and the other end of the temperature measuring contact member 3 is flattened on the outer side of the metal sleeve 20 of the thermocouple body 1.

[0042] The other ends of the first conductive member 17 and the second conductive member 18 are provided with power terminals 21 for connecting to the circuit board. Each power terminal 21 is correspondingly provided with an insulating rubber sleeve 22 for encapsulating the conductive member. An insulating rubber layer 23 is provided between the insulating rubber sleeve 22 and the end of the metal sleeve 20. The insulating rubber layer 23 wraps the end of the metal sleeve 20 and the head of the insulating rubber sleeve 22, so that the metal sleeve 20 forms a non-conductive indirect contact with the power terminal 21 through the insulating rubber sleeve 22, and the insulating rubber sleeve 22 is connected to the metal sleeve 20 through the insulating rubber layer 23.

[0043] In this embodiment, the first conductive member 17 and the second conductive member 18 are made of different materials, that is, the first conductive member 17 and the second conductive member 18 are made of two different metal materials. When the connection point of the first conductive member 17 and the second conductive member 18 is at different temperatures, an electromotive force will be generated in the circuit. This electromotive force is proportional to the temperature difference and is converted into a corresponding temperature measurement value through the corresponding instrument.

[0044] In this embodiment, the ends of the first conductive member 17 and the second conductive member 18 are in conductive contact with each other by welding.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0046] In the above description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply 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 present application.

[0047] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0048] In the above description of the present application, unless otherwise clearly specified and limited, if the terms "install", "connect", "connect", "fix" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection using screws, rivets or welding, or a detachable connection, or integrated through metal processing (die casting, deep drawing, stamping, lathe and other mechanical processing methods) or through injection molding; it can also be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0049] In the above description of the present application, unless otherwise clearly stipulated and limited, if there is a description that a first feature is "on" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

Claims

1. A thermocouple, comprising a thermocouple body (1), the thermocouple body (1) being provided with a temperature measuring conductive end (2); characterized in that: A temperature measuring contact piece (3) is provided on the temperature measuring conductive end (2) of the thermocouple body (1); a shielding piece (4) is provided between the temperature measuring contact piece (3) and the temperature measuring conductive end (2); the shielding piece (4) is sleeved on the outside of the temperature measuring conductive end (2); and the temperature measuring contact piece (3) is sleeved on the outside of the shielding piece (4); one end of the temperature measuring contact piece (3) is indirectly or directly abutted against the object to be measured, and the other end of the temperature measuring contact piece (3) forms a sealed fit with the thermocouple body (1).

2. The thermocouple according to claim 1, characterized in that: The shielding member (4) is made of a non-metallic material, the shielding member (4) forms an insulating member between the temperature measuring contact member (3) and the temperature measuring conductive end (2), the temperature measuring contact member (3) is arranged to be spaced apart from the temperature measuring conductive end (2) through the shielding member (4), so that non-conductive indirect contact is formed between the temperature measuring contact member (3) and the temperature measuring conductive end (2); or, the shielding member (4) comprises an insulating shielding member and a metal shielding member (24), the metal shielding member (24) is sleeved on the outside of the temperature measuring conductive end (2), the insulating shielding member is sleeved on the outside of the metal shielding member (24), and the temperature measuring contact member (3) is sleeved on the outside of the insulating shielding member.

3. The thermocouple according to claim 1, characterized in that: The insulating shielding component is provided with a receiving cavity (5) for inserting the temperature measuring conductive end (2), the receiving cavity (5) passing through the inner cavity of the insulating shielding component, one end of the insulating shielding component abuts against the thermocouple body (1), and the other end surface of the insulating shielding component is located at a height higher than the top of the temperature measuring conductive end (2) to prevent the inner side of the temperature measuring contact piece (3) from contacting the temperature measuring conductive end (2).

4. The thermocouple according to claim 1, characterized in that: The material of the temperature measuring contact piece (3) is a high temperature resistant metal material. The front end of the temperature measuring contact piece (3) is a sealed end and is directly or indirectly in contact with the object to be measured. A flat section (6) is provided at the rear of the temperature measuring contact piece (3). The inner side of the end of the flat section (6) is pressed and in contact with the outer side of the thermocouple body (1), so that a sealed fit is formed between the end of the temperature measuring contact piece (3) and the thermocouple body (1).

5. The thermocouple according to claim 1, characterized in that: The thermocouple body (1) is provided with an elastic anti-detachment component (7) corresponding to the object to be measured. The elastic anti-detachment component (7) comprises an elastic member (8) which is spirally wound and arranged on the outside of the thermocouple body (1) and the temperature measuring contact member (3). Under the elastic action of the elastic member (8), the temperature measuring contact member (3) forms an indirect or direct elastic contact with the object to be measured.

6. The thermocouple according to claim 5, characterized in that: The elastic anti-detachment assembly (7) further comprises an anti-detachment fastening member (9), the elastic member (8) being a spring, the anti-detachment fastening member (9) being provided with a through hole (10) through which the elastic member (8) passes, the anti-detachment fastening member (9) and the elastic member (8) being both sleeved on the outside of the thermocouple body (1), and the portion of the elastic member (8) passing through the through hole (10) being spirally wound and arranged on the outside of the thermocouple body (1) and the temperature measuring contact member (3); the outer diameter of the portion of the elastic member (8) passing through the through hole (10) being larger than the inner diameter of the through hole (10), so that the portion of the elastic member (8) passing through the through hole (10) abuts against the inner side of the through hole (10), and one end of the elastic member (8) is connected to the temperature measuring contact member (3) of the thermocouple body (1).

7. The thermocouple according to claim 6, characterized in that: The object to be measured is provided with an anti-detachment fitting (11), which is connected to the anti-detachment fastening piece (9) to form an anti-detachment structure that prevents the temperature measuring contact piece (3) of the thermocouple body (1) from detaching from the object to be measured.

8. The thermocouple according to claim 7, characterized in that: A detachable connecting buckle portion (12) is provided between the anti-drop buckle piece (9) and the anti-drop matching piece (11); The detachable connection buckle portion (12) comprises a clamping groove (13) provided on the anti-dropping buckle component (9) and a clamping column (14) provided on the anti-dropping matching component (11); the anti-dropping buckle component (9) is provided with a guide groove (15); an anti-dropping block (16) is provided between one end of the guide groove (15) and the clamping groove (13); and the other end of the guide groove (15) is connected to the clamping groove (13); When the anti-dropout fitting (11) is assembled with the anti-dropout buckle (9), the anti-dropout fitting (11) is inserted into the anti-dropout buckle (9), and the buckle column (14) is limited in the guide groove (15). After the anti-dropout fitting (11) is inserted into the corresponding position, the buckle column (14) rotates to the position corresponding to the slot (13) following the anti-dropout fitting (11), and the anti-dropout fitting (11) drives the buckle column (14) to move in the direction close to the anti-dropout block (16) into the slot (13), and the buckle column (14) is limited between the anti-dropout block (16) and the inner side of the slot (13); When the anti-detachment fitting (11) is separated from the anti-detachment fastening piece (9), the fastening column (14) moves out of the slot (13) in a direction away from the anti-detachment block (16), and after the anti-detachment block (16) rotates to a position corresponding to the guide groove (15) following the anti-detachment fitting (11), the fastening column (14) of the anti-detachment fitting (11) axially disengages from the guide groove (15), thereby realizing a detachable connection between the anti-detachment fastening piece (9) and the anti-detachment fitting (11).

9. The thermocouple according to claim 1, characterized in that: The thermocouple body (1) comprises a first conductive member (17) and a second conductive member (18); one end of the first conductive member (17) is connected to one end of the second conductive member (18) to form a temperature measuring conductive end (2); an insulating sleeve (19) is provided on the outer side of each of the first conductive member (17) and the second conductive member (18) corresponding to the rear of the temperature measuring conductive end (2); the thermocouple body (1) further comprises a metal sleeve (20) sleeved on the outer side of the insulating sleeve (19); the insulating sleeves (19) of the first conductive member (17) and the second conductive member (18) are inserted into the metal sleeve (20); the metal sleeve (20) forms non-conductive indirect contact with each conductive member through the insulating sleeve (19); and the other end of the temperature measuring contact member (3) is flattened on the outer side of the metal sleeve (20) of the thermocouple body (1).

10. The thermocouple according to claim 9, characterized in that: The other ends of the first conductive member (17) and the second conductive member (18) are provided with power terminals (21) for connecting to a circuit board, and each power terminal (21) is provided with an insulating rubber sleeve (22) for encapsulating the conductive member, and an insulating rubber layer (23) is provided between the insulating rubber sleeve (22) and the end of the metal sleeve (20), and the insulating rubber layer (23) wraps the end of the metal sleeve (20) and the beginning of the insulating rubber sleeve (22), so that the metal sleeve (20) forms a non-conductive indirect contact with the power terminal (21) through the insulating rubber sleeve (22), and the insulating rubber sleeve (22) is connected to the metal sleeve (20) through the insulating rubber layer (23).

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