Cable linear heat detector

Abstract

The application discloses a cable type linear heat temperature detector and particularly relates to the technical field of heat temperature detectors, comprising a processor, wherein a heat temperature sensing assembly is arranged on the processor; the heat temperature sensing assembly comprises a plurality of temperature sensing conductive ribs, a thermosensitive sensing core arranged in the temperature sensing conductive ribs, and a constant temperature galvanized steel wire end arranged at one end of the thermosensitive sensing core. The application sets a compensation wire between the metal woven mesh cover and the temperature sensing conductive rib, effectively compensates signal errors of the thermosensitive sensing core and the constant temperature galvanized steel wire end in the temperature detection process, effectively avoids false alarms or response delay problems caused by environmental fluctuations, and through a knob, a transfer pipe and an adjusting hole, the conductive core can be flexibly tightened, so that a plurality of temperature sensing conductive ribs are more tightly twisted. This not only enhances the integrity of the structure, but also ensures that heat can be quickly and uniformly transmitted to the thermosensitive sensing core in the sensing section, thereby greatly improving the response speed of the detector and the authenticity of temperature sensing.

Description

Technical Field

[0001] This invention relates to the field of temperature detector technology, and more specifically, to a cable-type linear temperature detector. Background Technology

[0002] As a core component of automatic fire alarm systems, temperature detectors assess fire risk and output alarm signals by sensing changes in ambient temperature. They are widely used in cable tunnels, cable shafts, power distribution equipment, transformers, and other cable and power facility scenarios.

[0003] Existing detectors lack precision compensation design, leading to errors in their judgment of temperature changes, frequent false alarms, or delayed alarm responses, making it impossible to provide timely and accurate fire risk warnings. Furthermore, the temperature sensing conduction structure of existing detectors is often a fixed and loose design, making it difficult to quickly and evenly transfer temperature to the sensing core in localized areas. This easily causes distortion in temperature detection results, failing to accurately reflect the actual temperature state of the monitored equipment. In environments with high-temperature heat sources such as radiators and ovens (e.g., electrical rooms, cable trays), existing detectors lack effective isolation and protection structures, allowing high-temperature heat sources to directly interfere with the normal monitoring of the thermistor, further reducing detection accuracy. Therefore, a cable-type linear temperature detector is proposed. Summary of the Invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a cable-type linear temperature sensor, which aims to solve the problems mentioned in the background art.

[0005] The present invention provides the following technical solution: a cable-type linear temperature detector, including a processor, wherein a temperature sensing component is disposed on the processor;

[0006] The temperature sensing component includes several temperature-conducting ribs, a thermistor core disposed within the temperature-conducting ribs, and a constant-temperature galvanized steel wire end disposed at one end of the thermistor core.

[0007] A protective component is provided on the outside of the temperature-sensitive conductive rib, and a compensating wire is provided between the temperature-sensitive conductive rib and the protective structure to compensate for the temperature detection accuracy of the thermal sensing core and the end of the constant-temperature galvanized steel wire.

[0008] The thermal sensing core has a conductive core in the middle. One end of the conductive core is connected to an adjustment component for tightening the conductive core to make the temperature-sensing conductive ribs tightly twisted. The thermal sensing core is filled with NTC thermal material. One end of the conductive core extends to the processor and is electrically connected to it.

[0009] The processor has an extension tube at its bottom, and a metal woven mesh sleeve at the bottom end of the extension tube. The metal woven mesh sleeve constitutes the outer layer of the protective structure. The protective component includes a polyester sleeve that is fitted on the outside of the temperature-conducting ribs. A plastic-aluminum composite sleeve is provided in the middle of the polyester sleeve. The plastic-aluminum composite sleeve is fitted on the outside of the thermal sensing core.

[0010] The conductive core is fitted with an inner liner tube, and an indicator light for displaying the working status is embedded in the inner liner tube. The bottom end of the inner liner tube is provided with a connector, and the bottom of the connector is provided with a constraint sleeve. The constraint sleeve is fitted onto the outer sheath of the protective structure. The adjustment assembly includes a horizontal tube located in the middle of the extension tube. The horizontal tube is located at the top of the inner liner tube, and a transfer tube is provided inside the horizontal tube. The surface of the transfer tube has an adjustment hole for the conductive core to pass through. The top and bottom of the horizontal tube are respectively provided with guide rings. The guide rings are coaxially arranged with the adjustment hole and are used for guiding and positioning when the conductive core is inserted. One end of the transfer tube is provided with a limiting block. The limiting block abuts against the inner wall of the horizontal tube to realize the positioning of the transfer tube. The extension tube is provided with a knob on the outside. One end of the knob is fixed to the end of the transfer tube and rotatably connected to the extension tube. The processor is provided with a display screen for displaying detection data on the outside.

[0011] The technical effects and advantages of this invention are as follows:

[0012] 1. This invention effectively compensates for the signal error between the thermal sensing core and the constant-temperature galvanized steel wire end during temperature detection by setting a compensating wire between the metal braided mesh sleeve and the temperature-conducting ribs. This significantly improves the accuracy of the detector's temperature judgment and effectively avoids false alarms or response delays caused by environmental fluctuations.

[0013] 2. This invention, while improving accuracy, allows for flexible tightening of the conductive core via knobs, a transfer tube, and adjustment holes, resulting in a tighter interlocking of multiple temperature-sensing conductive ribs. This not only enhances the overall structural integrity but also ensures that heat can be rapidly and evenly transferred to the thermistor core within the sensing section, thereby significantly improving the detector's response speed and the accuracy of temperature sensing.

[0014] 3. This invention utilizes tightly twisted temperature-conducting ribs, along with an outer metal braided mesh sleeve, polyester sleeve, plastic-aluminum composite sleeve, and outer sheath, to form a multi-layered protective and stable structure. This ensures the detector's mechanical strength and durability in complex industrial environments while effectively isolating the core sensing element from direct thermal interference from external high heat sources, further guaranteeing the reliability and accuracy of long-term monitoring under harsh conditions.

[0015] 4. This invention allows for easy optimization of the internal conductive structure's tightness by rotating a knob, and the adjusted structure can be automatically positioned via a limit block, making operation simple and the status stable. Simultaneously, the display screen on the outside of the processor and the indicator lights on the inner liner provide a clear visual interface for on-site status monitoring and alarm prompts, greatly enhancing the product's practicality and user experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not intended to limit the actual size of the product, the actual flow of the method, the actual timing of the signals, etc. involved in the embodiments of this disclosure.

[0017] Figure 1 This is a front view of the overall structure of the present invention.

[0018] Figure 2 This is a side view of the overall structure of the present invention.

[0019] Figure 3 This is a schematic diagram of the outer sheath, conductive core, metal braided mesh, temperature-sensitive conductive ribs, thermal sensing core, and constant-temperature galvanized steel wire end of the present invention.

[0020] Figure 4 This is a schematic diagram of the horizontal tube, guide ring, and knob of the present invention.

[0021] Figure 5 This is a schematic diagram of the horizontal tube, transfer tube, adjustment hole, limiting block, guide ring and knob of the present invention.

[0022] Figure 6 This is a schematic diagram of the extension tube, inner liner tube, signal light, connector, constraint sleeve, and outer sheath of the present invention.

[0023] Figure 7 This is a cross-sectional view of the temperature-sensitive conductive ribs, metal woven mesh sleeve, constant-temperature galvanized steel wire end, thermistor core, and NTC thermistor material of the present invention.

[0024] The attached diagram is labeled as follows: 1. Processor; 2. Extension tube; 3. Metal braided mesh sleeve; 4. Temperature-sensitive conductive rib; 5. Polyester sleeve; 6. Plastic-aluminum composite sleeve; 7. Thermistor core; 8. NTC thermistor material; 9. Constant-temperature galvanized steel wire end; 10. Compensating wire; 11. Outer sheath; 12. Conductive core; 13. Inner liner tube; 14. Signal light; 15. Connector; 16. Constraint sleeve; 17. Horizontal tube; 18. Transfer tube; 19. Adjustment hole; 20. Limiting block; 21. Guide ring; 22. Knob; 23. Display screen. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The cable-type linear temperature sensor disclosed in this embodiment is shown in the attached... Figure 1 - Appendix Figure 7 As shown, the device includes a processor 1, which serves as the core control unit. An extension tube 2 is threadedly fixed to the bottom of the processor 1. A metal braided mesh sleeve 3 is fitted onto the bottom end of the extension tube 2, forming the outermost layer of the detector's protective structure to resist external mechanical impact. A display screen 23 is embedded on the outside of the processor 1, which can display real-time temperature detection data, device operating status, and alarm information, such as… Figure 1 and attached Figure 2 As shown.

[0027] An inner liner tube 13 is inserted inside the extension tube 2. Indicator lights 14 are evenly embedded in the inner liner tube 13 to visually indicate whether the equipment is working properly and whether an alarm has occurred. A connector 15 is fixed to the bottom of the inner liner tube 13 by a snap fastener. A constraint sleeve 16 is fitted onto the bottom of the connector 15. The constraint sleeve 16 is tightly fitted onto the outer sheath 11 on the outside of the protective structure, achieving a stable connection between the inner liner tube 13 and the outer sheath 11. Figure 6 As shown. Further, conductive fibers can be embedded between the metal woven mesh sleeve 3 and the outer sheath 11. When the outer sheath 11 is damaged or the metal mesh sleeve breaks, the resistance value of the conductive fibers changes abruptly. After the processor 1 detects the resistance change, it issues an early warning through the display screen 23 and the indicator light 14 to identify potential safety hazards in advance.

[0028] The temperature sensing component is the core component of the detector that enables temperature sensing. Its structural cross-sectional view is shown below. Figure 7 As shown, the temperature sensing component includes several temperature-conducting ribs 4, each with an embedded thermistor core 7. Thermistor core 7 is filled with NTC thermistor material 8, which changes its resistivity with temperature, thus converting the temperature signal. A constant-temperature galvanized steel wire end 9 is welded to one end of the thermistor core 7 for initial temperature sensing and signal transmission. Furthermore, the constant-temperature galvanized steel wire end 9 is a stainless steel composite galvanized steel wire; the outer galvanization improves rust resistance, and the inner stainless steel enhances strength, preventing wire breakage after long-term use. Simultaneously, the wire end is designed in a pointed cone shape to reduce heat accumulation at the wire end and improve the sensitivity of initial temperature sensing.

[0029] The protective components are arranged sequentially from the inside out, specifically: a plastic-aluminum composite sleeve 6 is tightly fitted around the outside of the thermal sensing core 7, providing heat insulation and electromagnetic shielding; a polyester sleeve 5 is fitted around the outside of the plastic-aluminum composite sleeve 6 to enhance structural flexibility; compensating wires 10 are evenly arranged in the gap between the outer side of the polyester sleeve 5 and the metal braided mesh sleeve 3, with both ends of the compensating wires 10 electrically connected to the thermal sensing core 7 and the constant-temperature galvanized steel wire end 9, respectively, to compensate for signal errors during temperature detection. The structural fit of this part is as follows: Figure 3 As shown. The outer sheath 11 tightly wraps around the outside of the metal woven mesh sleeve 3, forming the final protective outer layer, as shown in the attached diagram. Figure 3-4 As shown.

[0030] A conductive core 12 is disposed through the middle of the thermal sensing core 7. One end of the conductive core 12 extends into the processor 1 and is electrically connected to its built-in detection module to realize the transmission of temperature signals. Its positional relationship with other components is as follows: Figure 3 and 6 As shown.

[0031] The adjustment component is used to adjust the tightness of the conductive core 12, thereby optimizing the twisting state of the temperature-sensing conductive ribs 4. Its structure is as follows: Figure 2 , Figure 4 and Figure 5 As shown. The adjustment assembly includes a horizontal tube 17 horizontally disposed in the middle of the extension tube 2. The horizontal tube 17 is located at the top of the inner liner tube 13. A transfer tube 18 is movably installed inside the horizontal tube 17. An adjustment hole 19 is opened on the surface of the transfer tube 18 for the conductor core 12 to pass through. The inner wall of the adjustment hole 19 is provided with anti-slip threads.

[0032] Guide rings 21 are welded to the top and bottom of the horizontal tube 17, respectively. The guide rings 21 are coaxially arranged with the adjustment hole 19 to ensure accurate positioning of the transmission core 12 during insertion and avoid misalignment. Furthermore, a position slot can be opened inside the adjustment hole 19 to cooperate with the protrusions on the surface of the transmission core 12, achieving multiple positions of fixation such as loose, moderate, and tight, preventing misalignment of the tightness due to vibration after adjustment. A limiting block 20 is integrally formed at one end of the transfer tube 18, which abuts against the inner wall of the horizontal tube 17 to achieve axial positioning of the transfer tube 18 and prevent excessive sliding within the horizontal tube 17. A knob 22 is movably installed on the outside of the extension tube 2. One end of the knob 22 is fixed to the end of the transfer tube 18 via a flat key and is rotatably connected to the extension tube 2 via a bearing. Rotating the knob 22 will drive the transfer tube 18 to rotate synchronously. Figure 4 and 5 As shown;

[0033] Furthermore, the manual knob 22 is eliminated, and a micro stepper motor is installed at the end of the transfer tube 18 and electrically connected to the processor 1. At the same time, a micro pressure sensor is embedded between the temperature-sensitive conductive ribs 4. When the sensor detects that the pressure value of the rib strands is loose, which is lower than the threshold, the processor automatically controls the motor to rotate and tighten the conductive core. When the pressure value is too tight, which is higher than the threshold, the motor rotates in the opposite direction to loosen it, thus realizing dynamic tightness adjustment without manual intervention.

[0034] The specific working principle is as follows: When the ambient temperature of the detector changes, the constant-temperature galvanized steel wire end 9 first senses the temperature change and transfers heat to the NTC thermistor material 8 inside the thermistor core 7. The resistivity of the NTC thermistor material 8 changes with temperature, which in turn causes a change in the resistance value between the constant-temperature galvanized steel wire end 9 and the differential temperature end. The processor 1's built-in detection module monitors this resistance change in real time. After analysis and judgment, if the temperature reaches the preset temperature threshold or the temperature change rate exceeds the preset differential temperature threshold, an alarm signal is immediately output. At this time, the display screen 23 displays the alarm information, and the indicator light 14 on the inner liner tube 13 flashes to issue a warning.

[0035] When it is necessary to optimize the temperature sensing and conduction effect, the knob 22 on the outside of the extension tube 2 can be rotated, as shown in the attached figure. Figure 5 As shown, knob 22 rotates the transfer tube 18 within the horizontal tube 17. When the transfer tube 18 rotates, the inner wall of the adjustment hole 19 contacts the outer side of the conductive core 12 and applies force, causing the conductive core 12 to tighten each temperature-sensing conductive rib 4, making the temperature-sensing conductive rib 4 more tightly twisted, improving heat transfer efficiency, and avoiding test result distortion due to poor local temperature transfer. After adjustment, the friction between the limiting block 20 and the inner wall of the horizontal tube 17 fixes the position of the transfer tube 18, ensuring stable adjustment.

[0036] The processor 1 has a built-in detection module that monitors resistance changes in real time. After analysis and processing, if the temperature reaches a preset temperature threshold such as 68℃ or the rate of temperature change exceeds a preset differential temperature threshold, an alarm mechanism is triggered. At this time, the display screen 23 on the outside of the processor 1 will clearly display the alarm temperature, alarm location, and alarm time. Simultaneously, the indicator light 14 on the inner liner tube 13 will begin to flash rapidly, sending a clear warning signal to on-site personnel.

[0037] The tightly twisted temperature-conducting ribs 4, together with the outer metal braided mesh sleeve 3, polyester sleeve 5, plastic-aluminum composite sleeve 6, and outer sheath 11, constitute a multi-layered protective structure. The metal braided mesh sleeve 3 and outer sheath 11 can resist external mechanical damage, while the polyester sleeve 5 and plastic-aluminum composite sleeve 6 can effectively isolate the direct thermal interference of external high heat sources to the core sensing element, ensuring that the detector can still perform stable and accurate temperature monitoring in complex environments with high-temperature heat sources, such as power distribution rooms and cable interlayers.

[0038] The above are merely 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 within the protection scope of the present invention.

Claims

1. A cable-type linear temperature sensor, comprising a processor (1), characterized in that: The processor (1) is provided with a temperature sensing component; The temperature sensing component includes several temperature-conducting ribs (4), and the temperature-conducting ribs (4) include a thermal sensing core (7) disposed in the temperature-conducting ribs (4) and a constant-temperature galvanized steel wire end (9) disposed at one end of the thermal sensing core (7). The temperature-sensing conductive rib (4) is provided with a protective component on the outside. The protective component includes a plastic-aluminum composite sleeve (6) sleeved on the outside of the temperature-sensing conductive rib (4) and a polyester sleeve (5) on the outside of the plastic-aluminum composite sleeve (6). A compensating wire (10) is provided on the outside of the polyester sleeve (5). A metal braided mesh sleeve (3) is provided on the outside of the compensating wire (10). An outer sheath (11) is provided on the outside of the metal braided mesh sleeve (3). The compensating wire (10) is used to compensate for the temperature detection accuracy of the thermal sensing core (7) and the constant-temperature galvanized steel wire end (9). The thermal sensing core (7) has a conductive core (12) in the middle. One end of the conductive core (12) is connected to an adjustment component for tightening the conductive core (12) so that the temperature-sensing conductive ribs (4) are tightly twisted. The adjustment assembly includes a horizontal tube (17) located in the middle of the extension tube (2), the horizontal tube (17) being located at the top of the inner liner tube (13), and a transfer tube (18) being provided inside the horizontal tube (17), with an adjustment hole (19) on the surface of the transfer tube (18) for the conductive core (12) to pass through. The top and bottom of the horizontal tube (17) are respectively provided with guide rings (21), the guide rings (21) are coaxially arranged with the adjustment hole (19) and are used for guiding and positioning when the conductor core (12) is inserted; one end of the transfer tube (18) is provided with a limiting block (20), the limiting block (20) abuts against the inner wall of the horizontal tube (17) to realize the positioning of the transfer tube (18); A knob (22) is provided on the outside of the extension tube (2). One end of the knob (22) is fixed to the end of the transfer tube (18) and is rotatably connected to the extension tube (2).

2. The cable-type linear temperature sensor according to claim 1, characterized in that: The thermal sensing core (7) is filled with NTC thermal material (8), and one end of the conductive core (12) extends to the processor (1) and is electrically connected to it.

3. The cable-type linear temperature sensor according to claim 1, characterized in that: The processor (1) has an extension tube (2) at its bottom, and a metal woven mesh sleeve (3) is provided at the bottom end of the extension tube (2).

4. The cable-type linear temperature sensor according to claim 1, characterized in that: The conductive core (12) is fitted with an inner liner tube (13) on the outside, and an indicator light (14) for displaying the working status is embedded in the inner liner tube (13).

5. The cable-type linear temperature sensor according to claim 4, characterized in that: The inner lining tube (13) is provided with a connector (15) at the bottom end, and a constraint sleeve (16) is provided at the bottom of the connector (15). The constraint sleeve (16) is fitted onto the outer sheath (11) on the outside of the protective structure.

6. The cable-type linear temperature sensor according to claim 1, characterized in that: The processor (1) is provided with a display screen (23) on its outer side for displaying detection data.

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