High-temperature-resistant and vibration-resistant thermocouple

Abstract

According to the high-temperature-resistant and vibration-resistant thermocouple provided by the invention, the probe and the lead are fixed in the mounting cavity of the connector, so that the lead and the probe are firmly connected in the mounting cavity. And filling the mounting cavity with an insulating powder layer, and wrapping and fixing the joint of the lead and the probe. After the mounting cavity is filled with the insulating powder layer, the connecting point of the probe and the lead is fixed in the mounting cavity, so that the probe and the lead are kept stable in the connector. As the insulating powder layer wraps and fixes the joint of the lead and the probe, the joint can be prevented from loosening or breaking even if shaking or vibration occurs in the transportation and use process, and the vibration resistance of the thermocouple is improved. The insulating powder layer provides electrical insulation, prevents signal interference caused by contact between the joint of the lead and the probe and the inner wall of the connector, and ensures the stability and accuracy of a measurement signal.

Description

Technical Field

[0001] The present application relates to the field of thermocouples, and in particular to a high temperature resistant and vibration resistant thermocouple. Background Art

[0002] Thermocouples are commonly used temperature measuring elements in temperature measuring instruments. They directly measure temperature and convert temperature signals into thermoelectric potential signals, which are then converted into the temperature of the measured medium through electrical instruments (secondary instruments).

[0003] The basic principle of thermocouple temperature measurement is to use two conductors of different materials to form a closed loop. When there is a temperature gradient at both ends, current will flow through the loop. At this time, there is an electromotive force between the two ends - thermoelectric electromotive force, which is used for temperature measurement.

[0004] The existing thermocouple is composed of a thermocouple probe, a connector and a lead wire. During the assembly process, one end of the thermocouple probe is inserted into the connector of the thermocouple and welded to the lead wire. The connector of the thermocouple is arranged in a pipeline and is made of metal. During transportation or use, the welding point between the lead wire and the thermocouple probe is located inside the connector. Due to shaking, the connection between the lead wire and the thermocouple may come into contact with the inner wall of the connector, resulting in signal interruption and signal instability during use, thereby affecting the measurement and use of the thermocouple.

[0005] Secondly, since the connection between the probe and the lead is located in the connector and there is a gap, the connection between the probe and the lead is easily broken during use, affecting subsequent use. Utility Model Content

[0006] In view of this, it is necessary to provide a high temperature resistant and vibration resistant thermocouple to solve the above problems.

[0007] The embodiment of the present application provides a high temperature resistant and vibration resistant thermocouple, comprising:

[0008] The connector is provided with a mounting cavity;

[0009] A probe, one end of which is disposed in the mounting cavity and the other end of which passes through the mounting cavity and extends to the outside;

[0010] A lead wire, one end of which is disposed in the mounting cavity and fixedly connected to the probe, and the other end of which passes through the mounting cavity and extends to the outside;

[0011] An insulating powder layer is arranged in the installation cavity and wraps the connection between the lead wire and the probe.

[0012] In at least one embodiment of the present application, the insulating powder layer completely fills the mounting cavity to fix the connection between the probe and the lead wire on the axis of the connector.

[0013] In at least one embodiment of the present application, the probe is arranged along the axis of the connector, and the lead is arranged along the axis of the connector.

[0014] In at least one embodiment of the present application, a blocking portion is provided at one end of the probe close to the connector, and the blocking portion is fixed to the connector to block one end of the connector.

[0015] In at least one embodiment of the present application, the high temperature resistant and vibration resistant thermocouple further comprises:

[0016] The blocking member is arranged at one end of the installation cavity away from the probe, and the blocking member and the blocking part are respectively located at two ends of the connector to seal the installation cavity.

[0017] In at least one embodiment of the present application, the connector has a first direction, in which a projection area of ​​the blocking portion completely blocks the mounting cavity, and the first direction is an axial direction of the connector disposed close to one end of the probe.

[0018] In at least one embodiment of the present application, the connector has a second direction, in which the projection areas of the blocking member and the lead completely block the installation cavity, and the second direction is opposite to the first direction.

[0019] In at least one embodiment of the present application, the sealing portion abuts against the insulating powder layer.

[0020] In at least one embodiment of the present application, the sealing member abuts against the insulating powder layer.

[0021] In at least one embodiment of the present application, one end of the lead wire passes through the geometric center of the blocking member and extends into the installation cavity.

[0022] The high temperature resistant and vibration resistant thermocouple of this embodiment will have at least the following beneficial effects:

[0023] The high temperature and vibration resistant thermocouple provided above fixes the probe and lead wire into the mounting cavity of the connector to ensure that the lead wire and the probe are firmly connected in the mounting cavity. Then fill the mounting cavity with an insulating powder layer to wrap and fix the connection between the lead wire and the probe.

[0024] After the insulating powder layer fills the mounting cavity, the connection points of the probe and lead wires are fixed in the mounting cavity to ensure that they remain stable in the connector.

[0025] Since the insulating powder layer wraps and fixes the connection between the lead wire and the probe, it can prevent the connection from loosening or breaking even if shaking or vibration occurs during transportation and use, thereby improving the vibration resistance of the thermocouple.

[0026] The insulating powder layer provides electrical insulation to prevent signal interference caused by the connection between the lead wire and the probe and the inner wall of the connector, ensuring the stability and accuracy of the measurement signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A three-dimensional diagram of a high temperature resistant and vibration resistant thermocouple in one embodiment;

[0028] Figure 2 for Figure 1 Exploded view of medium-high temperature and vibration-resistant thermocouple;

[0029] Figure 3 for Figure 1 Cross-sectional view of a medium-temperature, high-vibration-resistant thermocouple.

[0030] Main component symbols

[0031] 100. High temperature and vibration resistant thermocouple;

[0032] 110, connector; 110a, mounting cavity; A, first direction; B, second direction;

[0033] 120. probe; 121. blocking portion;

[0034] 130, lead;

[0035] 140, insulation powder layer;

[0036] 150. Sealing parts. DETAILED DESCRIPTION

[0037] The embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0038] It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a central component at the same time. When a component is considered to be "located on" another component, it may be directly located on the other component or there may be a central component at the same time. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "back", and similar expressions used herein are for illustrative purposes only.

[0039] Some embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0040] The embodiment of the present application provides a high temperature resistant and vibration resistant thermocouple 100, comprising:

[0041] The connector 110 is provided with a mounting cavity 110a;

[0042] A probe 120, one end of which is disposed in the installation cavity 110a, and the other end of which passes through the installation cavity 110a and extends to the outside;

[0043] A lead wire 130, one end of which is disposed in the mounting cavity 110a and fixedly connected to the probe 120, and the other end of which passes through the mounting cavity 110a and extends to the outside;

[0044] The insulating powder layer 140 is disposed in the mounting cavity 110 a and wraps the connection between the lead wire 130 and the probe 120 .

[0045] Please refer to Figure 1-Figure 3 In this embodiment, the probe 120 and the lead 130 are fixed to the mounting cavity 110a of the connector 110 to ensure that the lead 130 and the probe 120 are firmly connected in the mounting cavity 110a. Then, the mounting cavity 110a is filled with an insulating powder layer 140 to wrap and fix the connection between the lead 130 and the probe 120.

[0046] After the insulating powder layer 140 completely fills the mounting cavity 110 a , the connection points of the probe 120 and the lead wire 130 are fixed in the mounting cavity 110 a , ensuring that they remain stable in the connector 110 .

[0047] Since the insulating powder layer 140 wraps and fixes the connection between the lead wire 130 and the probe 120, even if shaking or vibration occurs during transportation and use, the connection can be prevented from loosening or breaking, thereby improving the vibration resistance of the thermocouple.

[0048] The insulating powder layer 140 provides electrical insulation to prevent signal interference caused by the connection between the lead wire 130 and the probe 120 contacting the inner wall of the connector 110 , thereby ensuring the stability and accuracy of the measurement signal.

[0049] It should be noted that the insulating powder layer 140 is insulating magnesium powder, and the insulating magnesium powder is used to fill and compact the entire installation cavity 110a, so that the interior of the installation cavity 110a is sealed, effectively preventing signal interruption and instability during transportation and use scenarios, thereby increasing tensile strength and vibration resistance. The thermocouple connector 110 is made of high-temperature resistant materials and can be used in an environment of up to 450 degrees Celsius, such as boron carbide, silicon carbide, boron nitride, silicon nitride, boron phosphide, silicon phosphide and other materials.

[0050] It should be further explained that the connector 110 is tubular and has a circular through-going installation cavity 110 a formed inside.

[0051] In this embodiment, the probe 120 is substantially cylindrical in shape, but may be other shapes in other embodiments.

[0052] The lead wire 130 has a substantially circular shaft shape.

[0053] The probe 120 is a temperature sensing element of a thermocouple, one end of which is located in the mounting cavity 110 a of the connector 110 , and the other end of which extends out of the connector 110 and is exposed to the external environment.

[0054] The probe 120 is responsible for directly contacting the measured medium and sensing the temperature. One end in the mounting cavity 110a is fixed by the connector 110 to keep it stable, while the external end is used for actual temperature measurement.

[0055] The lead wire 130 connects the probe 120 and an external electrical instrument, one end of which is connected to the probe 120 in the installation cavity 110 a and the other end of which extends from the installation cavity 110 a to the outside.

[0056] The lead 130 transmits the temperature signal sensed by the probe 120 to an external measuring device, ensuring that the temperature data can be accurately read and recorded.

[0057] The main function of the insulating powder layer 140 is to fix the connection point between the lead 130 and the probe 120 to prevent the connection from loosening or breaking due to vibration or shaking, and also provide electrical insulation to prevent signal interference.

[0058] In at least one embodiment of the present application, the insulating powder layer 140 completely fills the mounting cavity 110 a to fix the connection between the probe 120 and the lead wire 130 on the axis of the connector 110 .

[0059] Please refer to Figure 1-Figure 3 In this embodiment, when assembling the thermocouple, the insulating powder layer 140 is injected into the mounting cavity 110 a of the connector 110 to ensure that it completely fills the entire cavity and wraps the connection between the lead wire 130 and the probe 120 .

[0060] As the insulating powder layer 140 gradually fills the mounting cavity 110a, the connection between the lead wire 130 and the probe 120 is fixed on the axis of the connector 110. This not only ensures the stability of the connection position, but also provides necessary mechanical support and electrical insulation.

[0061] After the filling is completed, the density of the insulating powder layer 140 in the mounting cavity 110 a is checked to ensure that there are no gaps or unfilled areas to ensure the stability and functionality of the overall structure.

[0062] The insulating powder layer 140 completely fills the installation cavity 110a, so that the connection between the probe 120 and the lead 130 is fully fixed, and the vibration resistance is significantly improved. In a vibration environment, the connection will not loosen or break due to shaking.

[0063] The connection is fixed on the axis, ensuring the stability and consistency of signal transmission and reducing the possibility of signal interference and interruption.

[0064] The insulating powder layer 140 completely fills the mounting cavity 110 a , eliminating any possible gaps, enhancing the stability and durability of the entire connector 110 structure, and preventing deformation caused by mechanical stress or temperature changes.

[0065] In at least one embodiment of the present application, the probe 120 is disposed along the axis of the connector 110 , and the lead 130 is disposed along the axis of the connector 110 .

[0066] In this embodiment, during the assembly process, the probe 120 is accurately positioned on the axis of the connector 110 , so that one end of the probe 120 is located in the mounting cavity 110 a and the other end extends to the outside.

[0067] One end of the lead wire 130 is connected to the probe 120 in the installation cavity 110a, and the lead wire 130 is ensured to extend to the outside along the axial direction of the connector 110. The lead wire 130 and the probe 120 are respectively located at two ends of the connector 110, and the lead wire 130 and the probe 120 are connected by welding.

[0068] By using the insulating powder layer 140, the positions of the probe 120 and the lead wire 130 on the axis of the connector 110 are fixed to prevent them from deviating from the axis during use.

[0069] The probe 120 and the lead wire 130 are arranged along the axis of the connector 110 , thereby ensuring the symmetry and stability of the entire thermocouple structure and reducing the mechanical stress caused by deviation from the axis.

[0070] The axis arrangement enables the probe 120 and the lead wire 130 to evenly bear stress when vibrated, reduces the risk of loosening or breaking of the connection, and improves the vibration resistance of the thermocouple.

[0071] The lead wire 130 is arranged along the axis, which reduces the bending and twisting of the lead wire 130 in the connector 110, thereby improving the stability of signal transmission and ensuring the accuracy and reliability of temperature measurement data.

[0072] In at least one embodiment of the present application, a blocking portion 121 is provided at one end of the probe 120 close to the connector 110 , and the blocking portion 121 is fixed to the connector 110 to block one end of the connector 110 .

[0073] In at least one embodiment of the present application, the high temperature resistant and vibration resistant thermocouple 100 further includes:

[0074] The blocking member 150 is disposed at one end of the installation cavity 110 a away from the probe 120 . The blocking member 150 and the blocking portion 121 are respectively located at two ends of the connector 110 to seal the installation cavity 110 a .

[0075] Please refer to Figure 1-Figure 3 In this embodiment, during the assembly process, a sealing portion 121 is provided at one end of the probe 120 close to the connector 110 and is fixed to one end of the connector 110 to ensure its stability.

[0076] After the probe 120 and the lead wire 130 are installed in the installation cavity 110a, a blocking member 150 is arranged at the other end of the installation cavity 110a to ensure that it and the blocking portion 121 are located at both ends of the connector 110 to form a complete seal for the installation cavity 110a.

[0077] Before sealing, the insulating powder layer 140 is filled into the installation cavity 110 a to ensure that it completely covers the connection between the lead wire 130 and the probe 120 and fills the entire installation cavity 110 a .

[0078] By providing the blocking portion 121 and the blocking member 150 at both ends of the connector 110 , the installation cavity 110 a is completely sealed to prevent impurities, moisture or other substances in the external environment from entering the installation cavity 110 a , thereby protecting the internal components.

[0079] The blocking portion 121 and the blocking member 150 fix the probe 120 and the lead wire 130 , while increasing the overall rigidity and vibration resistance of the thermocouple and reducing the impact of vibration on the internal connections.

[0080] It should be noted that the sealing portion 121 is roughly cylindrical in shape, and in other embodiments it may be a concave or convex cylindrical structure; the sealing member 150 is an annular structure, and the sealing portion 121 and the sealing member 150 are used to seal the two ends of the connector 110 so that the installation cavity 110a forms a sealed cavity.

[0081] In at least one embodiment of the present application, the connector 110 has a first direction A, in which the projection area of ​​the blocking portion 121 completely blocks the mounting cavity 110a, and the first direction A is the axial direction of the connector 110 and is arranged close to one end of the probe 120.

[0082] Please refer to Figure 1-Figure 3In the present embodiment, by ensuring that the projection area of ​​the sealing portion 121 completely blocks the installation cavity 110a in the first direction A, the installation cavity 110a is completely sealed to prevent foreign substances from entering the cavity. Secondly, the insulating powder layer 140 is protected to prevent the insulating powder layer 140 from exposing the installation cavity 110a and affecting the stability of the connection between the probe 120 and the lead 130.

[0083] In at least one embodiment of the present application, the connector 110 has a second direction B. In the second direction B, the projection areas of the blocking member 150 and the lead 130 completely block the installation cavity 110a. The second direction B is opposite to the first direction A.

[0084] Please refer to Figure 1-Figure 3 In this embodiment, the projection area of ​​the blocking member 150 and the lead 130 in the second direction B can completely cover and seal the installation cavity 110a.

[0085] By ensuring that the projection area of ​​the sealing member 150 and the lead 130 completely blocks the installation cavity 110a in the second direction B, the installation cavity 110a is completely sealed to prevent foreign matter from entering the cavity. Secondly, the insulating powder layer 140 is protected to prevent the insulating powder layer 140 from exposing the installation cavity 110a and affecting the stability of the connection between the probe 120 and the lead 130.

[0086] It also increases the overall rigidity and vibration resistance of the thermocouple and reduces the impact of vibration on internal connections.

[0087] In at least one embodiment of the present application, the sealing portion 121 abuts against the insulating powder layer 140 .

[0088] In at least one embodiment of the present application, the sealing member 150 abuts against the insulating powder layer 140 .

[0089] Please refer to Figure 1-Figure 3 In this embodiment, the sealing portion 121 is located at one end of the connector 110 and directly contacts the insulating powder layer 140 filled in the mounting cavity 110a, thereby ensuring that the sealing portion 121 can effectively fix and seal the insulating powder layer 140 to prevent it from moving or loosening.

[0090] The plugging member 150 is located at the other end of the connector 110 and abuts against the insulating powder layer 140 in the installation cavity 110a, thereby ensuring that the plugging member 150 can effectively fix and seal the insulating powder layer 140 and cooperate with the plugging portion 121 to achieve all-round fixation and sealing of the insulating powder layer 140.

[0091] After the probe 120 and the lead wire 130 are fixed to the connector 110 , the insulating powder layer 140 is filled into the mounting cavity 110 a to ensure that the insulating powder layer 140 completely covers the connection between the lead wire 130 and the probe 120 .

[0092] Confirm that the blocking portion 121 and the blocking member 150 are both in contact with the insulating powder layer 140 to ensure that there is no looseness or gap in the insulating powder layer 140 in the installation cavity 110 a, thereby achieving a perfect sealing effect.

[0093] After being fixed by the blocking portion 121 and the blocking member 150 , the insulating powder layer 140 can maintain good electrical insulation performance, prevent electrical interference between the lead wire 130 and the probe 120 , and ensure the accuracy and stability of the measurement signal.

[0094] The close contact between the sealing portion 121 and the sealing member 150 and the insulating powder layer 140 enables the insulating powder layer 140 to effectively buffer and absorb vibration energy when the thermocouple is subjected to vibration or impact, thereby reducing damage to internal connections and improving the vibration resistance and tensile strength of the thermocouple.

[0095] Since the blocking portion 121 and the blocking member 150 are in contact with the insulating powder layer 140 , the insulating powder layer 140 can fix the connection between the lead wire 130 and the probe 120 and form friction to increase the tensile strength.

[0096] In at least one embodiment of the present application, one end of the lead wire 130 passes through the geometric center of the blocking member 150 and extends into the installation cavity 110 a.

[0097] In this embodiment, the lead 130 passes through the geometric center of the blocking member 150 to ensure that the path of the lead 130 in the installation cavity 110a is stable, thereby reducing the deviation and bending of the lead 130 caused by external forces and improving the stability of the overall structure.

[0098] The lead wire 130 can remain straight after passing through the center of the blocking member 150 , thereby reducing the electrical performance loss caused by the bending and twisting of the lead wire 130 and ensuring the stability and accuracy of the measurement signal.

[0099] The lead wire 130 passing through the center of the blocking member 150 can maintain good stability when subjected to vibration, thereby reducing the risk of the lead wire 130 breaking or loosening due to vibration and improving the anti-vibration capability of the thermocouple.

[0100] The above is only an implementation method of the present application. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present application, but these improvements are within the scope of protection of the present application.

Claims

1. A high temperature resistant and vibration resistant thermocouple, characterized in that: include: The connector is provided with a mounting cavity; A probe, one end of which is disposed in the mounting cavity and the other end of which passes through the mounting cavity and extends to the outside; A lead wire, one end of which is disposed in the mounting cavity and fixedly connected to the probe, and the other end of which passes through the mounting cavity and extends to the outside; An insulating powder layer is arranged in the installation cavity and wraps the connection between the lead wire and the probe.

2. The high temperature resistant and vibration resistant thermocouple according to claim 1, characterized in that: The insulating powder layer fills up the installation cavity to fix the connection between the probe and the lead wire on the axis of the connector.

3. The high temperature resistant and vibration resistant thermocouple according to claim 1, characterized in that: The probe is arranged along the axis of the connector, and the lead is arranged along the axis of the connector.

4. The high temperature resistant and vibration resistant thermocouple according to claim 1, characterized in that: A blocking portion is provided on one end of the probe close to the connector, and the blocking portion is fixed to the connector to block one end of the connector.

5. The high temperature resistant and vibration resistant thermocouple according to claim 4, characterized in that: The high temperature resistant and vibration resistant thermocouple also includes: The blocking member is arranged at one end of the installation cavity away from the probe, and the blocking member and the blocking part are respectively located at two ends of the connector to seal the installation cavity.

6. The high temperature resistant and vibration resistant thermocouple according to claim 5, characterized in that: The connector has a first direction. In the first direction, the projection area of ​​the blocking portion completely blocks the installation cavity. The first direction is the axial direction of the connector, which is arranged close to one end of the probe.

7. The high temperature resistant and vibration resistant thermocouple according to claim 6, characterized in that: The connector has a second direction. In the second direction, the projection areas of the blocking member and the lead completely cover the installation cavity. The second direction is opposite to the first direction.

8. The high temperature resistant and vibration resistant thermocouple according to claim 4, characterized in that: The sealing portion abuts against the insulating powder layer.

9. The high temperature resistant and vibration resistant thermocouple according to claim 5, characterized in that: The blocking member abuts against the insulating powder layer.

10. The high temperature resistant and vibration resistant thermocouple according to claim 5, characterized in that: One end of the lead wire passes through the geometric center of the blocking member and extends into the installation cavity.

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