A temperature sensor

Abstract

This utility model discloses a temperature sensor, including a thermistor, a pair of leads, and a pair of connecting terminals. One end of the pair of leads is fixedly connected to the thermistor, and the pair of connecting terminals are respectively fixedly connected to the other ends of the pair of leads. An elastic protection mechanism is arranged on the outside of the leads. The elastic protection mechanism includes a sealing colloid, a protective sleeve, a pair of anti-bending sleeves, and an anti-wear outer tube. The sealing colloid fills the space between the pair of leads and the thermistor. The pair of anti-bending sleeves are respectively fitted on the outside of the pair of leads, and the anti-wear outer tube is fitted on the outside of the pair of anti-bending sleeves. A protective sleeve is fitted between the lower end of the anti-wear outer tube and the top end of the sealing colloid. The temperature sensor disclosed in this utility model can provide multiple elastic protections at the connection position, improving the protection effect while ensuring the flexibility of the leads. It reduces the possibility of breakage or damage to the temperature sensor leads due to repeated bending and wear, thus improving the stability of the temperature sensor in use.

Description

Technical Field

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

[0002] Temperature sensors are a type of sensor that can sense temperature and convert it into a usable output signal. According to different measurement methods, they can be divided into two categories: contact and non-contact. Among them, the detection part of the contact temperature sensor measures temperature by contacting the object being measured. Common contact temperature sensors include pressure thermometers, resistance temperature sensors, thermistors, and thermocouple temperature sensors. Resistance temperature sensors are widely used in metallurgy, electronics, food, medicine, and petrochemical fields due to their advantages of high accuracy and linearity.

[0003] Resistance temperature sensors typically consist of a resistance element, a protective sleeve, leads, and an insulating outer sheath. The leads are mainly connected to the resistance element by welding. This makes the resistance temperature sensor susceptible to lead breakage or disconnection from the resistance element due to factors such as lead bending and external wear during practical applications, resulting in poor stability of the resistance temperature sensor.

[0004] Therefore, it is necessary to provide a temperature sensor to address the aforementioned technical problems.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a temperature sensor that can provide encased protection for the leads and the thermal resistor.

[0007] To achieve the above objectives, the technical solution provided by a specific embodiment of this utility model is as follows:

[0008] A temperature sensor includes a resistance temperature detector (RTD), a pair of leads, and a pair of connecting terminals. One end of the pair of leads is fixedly connected to the RTD, and the pair of connecting terminals are respectively fixedly connected to the other ends of the pair of leads. An elastic protection mechanism is disposed on the outside of the leads. The elastic protection mechanism includes a sealing compound, a protective sleeve, a pair of anti-bending sleeves, and an anti-wear outer tube. The sealing compound is filled between the pair of leads and the RTD. The pair of anti-bending sleeves are respectively sleeved on the outside of the pair of leads. The anti-wear outer tube is sleeved on the outside of the pair of anti-bending sleeves. A protective sleeve is sleeved between the lower end of the anti-wear outer tube and the top end of the sealing compound.

[0009] In one or more embodiments of this utility model, a mounting groove is provided at one end of the resistance thermometer close to the lead wire, and both the lead wire and the sealant are mounted in the mounting groove. The mounting groove provides mounting space for the lead wire and the sealant, and at the same time, the resistance thermometer itself can bend and protect the connection position between the lead wire and the resistance thermometer, reducing the risk of bending and breakage.

[0010] In one or more embodiments of this utility model, the lead wire includes a conductive core wire and an insulating outer sheath. The insulating outer sheath is fixedly sleeved on the outside of the conductive core wire, and both ends of the conductive core wire penetrate the insulating outer sheath. Signal transmission is performed through the conductive core wire, and the insulating outer sheath provides insulation protection for the conductive core wire.

[0011] In one or more embodiments of this utility model, one end of the conductive core wire located in the assembly groove is welded to the resistance thermometer, and a solder joint is formed between the conductive core wire and the resistance thermometer. The solder joint connects the conductive core wire and the resistance thermometer for signal transmission. The sealing adhesive covers the outside of the solder joint, providing anti-bending protection and improving the connection stability between the conductive core wire and the resistance thermometer.

[0012] In one or more embodiments of this utility model, the connection terminal includes a metal conductive end and an insulating shell. The end of the conductive core wire away from the thermal resistor is connected to the metal conductive end inside the connection terminal. The insulating shell provides insulation protection for the metal conductive end, and the conductive core wire is connected to other devices by connecting to the metal conductive end.

[0013] In one or more embodiments of this utility model, the front view of the sealant is T-shaped, the lower part of the sealant is disposed in the assembly groove, and the diameter of the upper part of the sealant is larger than the diameter of the lower part. The sealant provides bending protection for the solder joint and also serves to fix and limit the insulation of the conductive core wire.

[0014] In one or more embodiments of this utility model, the protective sleeve is an insulating heat-shrinkable sleeve, comprising a trumpet-shaped lower tube and an upper tube. The trumpet-shaped lower tube is fitted over the outside of the sealing colloid, and the upper tube is fitted over the outside of the anti-wear outer tube. By using the anti-wear outer tube to protect the sealing colloid and the anti-wear outer tube, the risk of breakage at the connection between the thermal resistor and the lead wire after repeated bending is further reduced.

[0015] In one or more embodiments of this utility model, the anti-bending sleeve is a polyvinyl chloride protective sleeve, the anti-bending sleeve is spirally arranged, and the anti-bending sleeve is arranged inside the anti-wear outer tube.

[0016] In one or more embodiments of this utility model, the abrasion-resistant outer tube is woven from cotton yarn and linen yarn. This ensures the flexibility and abrasion-resistant protective effect of the abrasion-resistant outer tube.

[0017] In one or more embodiments of this utility model, an elastic filler is filled between the pair of anti-bending sleeves, and the anti-abrasion outer tube is sleeved on the outside of the lead wire, the anti-bending sleeve, and the elastic filler. The elastic filler can support and protect the pair of anti-bending sleeves, reducing the risk of damage or breakage of the lead wire after multiple bends.

[0018] Compared with the prior art, the temperature sensor disclosed in this utility model can provide multiple elastic protections for the connection position, which improves the protection effect while ensuring the flexibility of the lead wire. It reduces the possibility of the temperature sensor lead wire breaking or being damaged due to repeated bending and wear, and improves the stability of the temperature sensor in use. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of a temperature sensor in one embodiment of the present invention;

[0021] Figure 2 This is a partial structural diagram of a temperature sensor in one embodiment of the present invention;

[0022] Figure 3 This is a front sectional view of a temperature sensor in one embodiment of the present invention;

[0023] Figure 4 for Figure 3 Schematic diagram of the structure at point A in the middle;

[0024] Figure 5 for Figure 3 Schematic diagram of the structure at point B.

[0025] Explanation of key figure labels:

[0026] 1-Thermostat element, 2-Lead wire, 201-Conductive core wire, 202-Insulating outer sheath, 3-Connecting terminal, 4-Elastic protection mechanism, 401-Sealing colloid, 402-Protective sleeve, 403-Anti-bending sleeve, 404-Anti-wear outer tube, 405-Elastic filler, 5-Solder joint. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0028] like Figures 1 to 5 As shown, a temperature sensor in one embodiment of this utility model includes a resistance temperature detector (RTD) element 1, a pair of leads 2, and a pair of connecting terminals 3. One end of each lead 2 is fixedly connected to the RTD element 1, and the connecting terminals 3 are respectively fixedly connected to the other ends of the leads 2. In practical applications, the leads 2 can be used to conduct signals to the RTD element 1, and the connecting terminals 3 can be used to connect the leads 2 to other devices for signal transmission.

[0029] like Figures 3 to 4 As shown, a mounting groove is provided at one end of the resistance thermometer 1 close to the lead wire 2, and both the lead wire 2 and the sealant 401 are mounted in the mounting groove. The mounting groove provides mounting space for the lead wire 2 and the sealant 401. At the same time, the resistance thermometer 1 itself can bend and protect the connection between the lead wire 2 and the resistance thermometer 1, reducing the risk of bending and breakage.

[0030] like Figures 3 to 4 As shown, lead 2 includes a conductive core wire 201 and an insulating outer sheath 202. The insulating outer sheath 202 is fixedly sleeved on the outside of the conductive core wire 201, and both ends of the conductive core wire 201 pass through the insulating outer sheath 202. Signal transmission is carried out through the conductive core wire 201, and the insulating outer sheath 202 provides insulation protection for the conductive core wire 201.

[0031] like Figures 3 to 4 As shown, one end of the conductive core wire 201 located in the assembly groove is welded to the resistance thermometer 1. A solder joint 5 is formed between the conductive core wire 201 and the resistance thermometer 1, which connects the conductive core wire 201 and the resistance thermometer 1 and facilitates signal transmission. A sealing compound 401 covers the outside of the solder joint 5, providing anti-bending protection and improving the connection stability between the conductive core wire 201 and the resistance thermometer 1.

[0032] The connecting terminal 3 comprises a metal conductive end and an insulating shell. The end of the conductive core wire 201 furthest from the thermal resistor 1 is connected to the metal conductive end inside the connecting terminal 3. The insulating shell provides insulation protection for the metal conductive end, and the conductive core wire 201 is connected to other devices through the connection with the metal conductive end.

[0033] like Figures 3 to 5 As shown, the elastic protection mechanism 4 is arranged on the outside of the lead wire 2. The elastic protection mechanism 4 includes a sealing colloid 401, a protective sleeve 402, a pair of anti-bending sleeves 403, and an anti-wear outer tube 404. The sealing colloid 401 fills the space between the pair of lead wires 2 and the thermal resistor 1. By injecting the sealing colloid 401 into the assembly groove, the sealing colloid 401 can seal and protect the solder joint 5. At the same time, it can protect the lead wires 2 and the thermal resistor 1 from bending.

[0034] Specifically, the sealant 401 has a T-shaped cross-section in frontal view. The lower part of the sealant 401 is arranged in the assembly groove, and the diameter of the upper part of the sealant 401 is larger than that of the lower part. The sealant 401 bends and protects the solder joint 5, and at the same time, it can fix and limit the insulation of the conductive core wire 201.

[0035] like Figure 2 As shown, a pair of anti-bending sleeves 403 are respectively sleeved on the outside of a pair of lead wires 2, and an anti-wear outer tube 404 is sleeved on the outside of a pair of anti-bending sleeves 403. The anti-bending sleeves 403 are polyvinyl chloride protective sleeves. The anti-bending sleeves 403 are spirally arranged and are arranged inside the anti-wear outer tubes 404.

[0036] Specifically, the abrasion-resistant outer tube 404 is woven from cotton yarn and linen yarn. This ensures the softness and abrasion-resistant protective effect of the abrasion-resistant outer tube 404.

[0037] like Figures 3 to 4 As shown, a protective sleeve 402 is fitted between the lower end of the anti-wear outer tube 404 and the top end of the sealing colloid 401. The protective sleeve 402 is an insulating heat-shrinkable sleeve, comprising a trumpet-shaped lower tube and an upper tube. The trumpet-shaped lower tube is fitted over the outside of the sealing colloid 401, and the upper tube is fitted over the outside of the anti-wear outer tube 404. By using the anti-wear outer tube 404 to protect the sealing colloid 401 and the anti-wear outer tube 404, the risk of breakage at the connection between the thermal resistor 1 and the lead wire 2 after repeated bending is further reduced.

[0038] like Figures 3 to 5 As shown, an elastic filler 405 is filled between a pair of anti-bending sleeves 403, and an anti-wear outer tube 404 is sleeved on the outside of the lead wire 2, the anti-bending sleeves 403, and the elastic filler 405. The elastic filler 405 can support and protect the pair of anti-bending sleeves 403, reducing the risk of damage or breakage of the lead wire 2 after multiple bends.

[0039] In practical use, a pair of conductive core wires 201 are arranged in the assembly groove, and the conductive core wires 201 are connected and fixed to the thermal resistor 1 by welding. The welding forms a solder point 5 to ensure the connection effect between the conductive core wires 201 and the thermal resistor 1. After welding, the sealing glue 401 is filled into the assembly groove by injection, and the sealing glue 401 is used to limit the assembly of the conductive core wires 201 and the thermal resistor 1.

[0040] Meanwhile, the leads 2 are protected against bending by wearing anti-bending sleeves 403 on the outside of the pair of leads 2, and then wearing anti-wear outer tubes 404 on the outside of the pair of anti-bending sleeves 403. Furthermore, the connection between the anti-wear outer tube 404 and the sealing colloid 401 can be protected against bending by fitting the protective sleeve 402 over the sealing colloid 401. This reduces the risk of damage to the leads 2 due to bending or abrasion.

[0041] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A temperature sensor, characterized in that, It includes a resistance thermometer, a pair of leads and a pair of connecting terminals, one end of the pair of leads is fixedly connected to the resistance thermometer, and the pair of connecting terminals are respectively fixedly connected to the other end of the pair of leads. An elastic protection mechanism is installed on the outside of the leads. The elastic protection mechanism includes a sealing colloid, a protective sleeve, a pair of anti-bending sleeves, and an anti-wear outer tube. The sealing colloid is filled between the pair of leads and the thermal resistor. The pair of anti-bending sleeves are respectively sleeved on the outside of the pair of leads. The anti-wear outer tube is sleeved on the outside of the pair of anti-bending sleeves. A protective sleeve is sleeved between the lower end of the anti-wear outer tube and the top end of the sealing colloid.

2. The temperature sensor according to claim 1, characterized in that, The end of the thermal resistor close to the lead wire has an assembly groove, and both the lead wire and the sealing colloid are assembled in the assembly groove.

3. The temperature sensor according to claim 2, characterized in that, The lead wire includes a conductive core wire and an insulating outer sheath. The insulating outer sheath is fixedly sleeved on the outside of the conductive core wire, and both ends of the conductive core wire pass through the insulating outer sheath.

4. The temperature sensor according to claim 3, characterized in that, One end of the conductive core wire located in the assembly groove is welded to the thermal resistor, and a solder joint is formed between the conductive core wire and the thermal resistor. The sealing adhesive covers the outside of the solder joint.

5. The temperature sensor according to claim 4, characterized in that, The connection terminal comprises a metal conductive end and an insulating shell, and the end of the conductive core wire away from the thermal resistor is connected to the metal conductive end inside the connection terminal.

6. The temperature sensor according to claim 5, characterized in that, The frontal cross-section of the sealant is T-shaped, with the lower part of the sealant positioned within the assembly groove, and the upper part of the sealant having a larger diameter than the lower part.

7. The temperature sensor according to claim 6, characterized in that, The protective sleeve is an insulating heat shrinkable sleeve, which includes a trumpet-shaped lower bottom tube and an upper cylinder. The trumpet-shaped lower bottom tube is fitted on the outside of the sealing colloid, and the upper cylinder is fitted on the outside of the anti-wear outer tube.

8. The temperature sensor according to claim 7, characterized in that, The anti-bending sleeve is a polyvinyl chloride protective sleeve, which is spirally arranged and installed inside the anti-wear outer tube.

9. The temperature sensor according to claim 8, characterized in that, The abrasion-resistant outer tube is woven from cotton yarn and linen yarn.

10. The temperature sensor according to claim 9, characterized in that, An elastic filler is filled between the pair of anti-bending sleeves, and the anti-wear outer tube is sleeved on the outside of the lead wire, the anti-bending sleeve and the elastic filler.

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