A temperature sensor for pump station operating condition monitoring

Abstract

The application discloses a kind of temperature sensors for pump station operating state monitoring, it is related to pump station unit temperature monitoring technical field, including outer sleeve tube, ceramic tube is arranged in the outer sleeve tube, the circumference outer wall of the ceramic tube is respectively around with first platinum wire and second platinum wire, one end of the first platinum wire is welded with short-circuiting line, and the first platinum wire is short-circuited with the second platinum wire by short-circuiting line;The one end of the first platinum wire and the second platinum wire is welded with metal sheet, the one side of the metal sheet is welded with lead wire, and the bottom of the outer sleeve tube is fixedly connected with lead wire sheath for protecting lead wire;The inside of the outer sleeve tube is filled with magnesium oxide powder for insulating electromagnetic signal and conducting heat.The application realizes real-time, accurate monitoring of air cooler temperature, provides reliable guarantee for safe operation of pump station unit, avoids unit failure or unnecessary shutdown caused by temperature anomaly.

Description

Technical Field

[0001] This invention relates to the field of temperature monitoring technology for pump station units, and more specifically, to a temperature sensor for monitoring the operating status of pump stations. Background Technology

[0002] As a core infrastructure in water diversion projects, the stable operation of pumping stations directly affects the smooth progress of water diversion tasks. During the daily operation of pumping station units for water diversion, due to the long service life of some equipment, equipment aging issues gradually become prominent, significantly increasing the risk of various operational failures. Among these, excessively high air cooler temperature is one of the common hidden dangers in pumping station unit operation: when the air cooler temperature rises abnormally, it directly leads to a synchronous increase in the temperature of the motor windings and bearings, resulting in a decrease in the lubricating performance of the lubricating oil, increased vibration amplitude during unit operation, and a significant increase in energy consumption. Under this condition for a long time, the insulation performance of the equipment will deteriorate rapidly, and the wear and aging of mechanical parts will also accelerate significantly. In severe cases, it will trigger the unit's protection alarm system and even cause the unit to trip and shut down, which not only affects the safe and stable execution of water diversion tasks but may also cause a series of chain losses such as equipment damage and increased maintenance costs. Therefore, real-time monitoring of the internal temperature of the air cooler through temperature sensors is particularly important.

[0003] Currently, due to the high humidity within pumping stations and the extremely high power of the pumping units (typically around 7000kW per unit), electromagnetic interference is excessively strong. Traditional temperature sensors have poor anti-interference capabilities, easily leading to distorted temperature signals and drastic data fluctuations. This makes it difficult to accurately capture the true temperature changes inside the air cooler, either misinterpreting normal temperatures as abnormally high temperatures, causing unnecessary unit shutdowns, or reacting slowly to actual temperature exceedances, failing to provide timely warnings of potential faults. Furthermore, the smooth cylindrical shells of traditional temperature sensors are prone to forming stagnant water zones on their surfaces in the high-speed airflow environment inside the air cooler, resulting in insufficient heat exchange and slow temperature response, further reducing the timeliness of temperature monitoring. Therefore, a new temperature sensor for monitoring the operational status of pumping stations is urgently needed to solve these problems. Summary of the Invention

[0004] In view of the problems in the related technologies, the present invention proposes a temperature sensor for monitoring the operating status of pumping stations, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] The technical solution of this invention is implemented as follows:

[0006] A temperature sensor for monitoring the operating status of a pumping station includes an outer tube, inside which a ceramic tube is disposed. A first platinum wire and a second platinum wire are respectively wound around the outer circumference of the ceramic tube. A shorting wire is welded to one end of the first platinum wire, and the first platinum wire is shorted to the second platinum wire through the shorting wire.

[0007] Both the first platinum wire and the second platinum wire have a metal sheet welded to one end, a lead wire welded to one side of the metal sheet, and a wire sheath for protecting the lead wire is fixedly connected to the bottom of the outer tube.

[0008] The outer tube is filled with magnesium oxide powder for insulating and conducting heat to electromagnetic signals, and a sealing layer is provided inside the outer tube to ensure internal sealing.

[0009] Preferably, both the first platinum wire and the second platinum wire are spirally wound around the outer circumference of the ceramic tube, and the first platinum wire and the second platinum wire are wound in parallel along the axial direction of the ceramic tube and spatially staggered.

[0010] Preferably, the pitch of the first platinum wire and the second platinum wire is distributed in a pattern where the pitches at both ends are large and the pitches in the middle are small.

[0011] Preferably, the outer circumferential wall of the ceramic tube is provided with two sets of fixing grooves. The first platinum wire is correspondingly engaged in the interior of one set of fixing grooves, and the second platinum wire is correspondingly engaged in the interior of the other set of fixing grooves. Each set of fixing grooves is spiral-shaped to fit the corresponding platinum wire, and each set of fixing grooves forms a semi-enclosed limiting structure for the corresponding platinum wire.

[0012] Preferably, the ceramic tube has an internal cavity, which has a stepped structure with an increased diameter in the middle, and its inner diameter gradually increases from both ends along the middle direction.

[0013] Preferably, the outer sheath includes a circular tube portion and an end portion, the end portion being bullet-shaped, with the tip of the end portion facing away from the conductor sheath.

[0014] Preferably, the outer circumferential wall of the circular tube is provided with equally spaced circular guide grooves, the cross-section of the guide grooves is arc-shaped, and the guide grooves extend along the axial direction of the circular tube.

[0015] Preferably, the outer circumferential wall of the end is integrally formed with axial fins, the axial fins are distributed in a circular pattern at equal intervals on the outer circumferential wall of the end, and the axial fins extend along the axial direction of the end.

[0016] Preferably, the axial fins and the guide groove are located on the same horizontal plane, and the extension direction of the axial fins is collinear with the extension direction of the guide groove.

[0017] Preferably, a ground wire is welded to the bottom outer wall of the outer sleeve, one end of the ground wire is electrically connected to the outer sleeve, and the end of the ground wire away from the outer sleeve is used to electrically connect to an external grounding terminal.

[0018] The beneficial effects of this invention are:

[0019] This invention provides a temperature sensor for monitoring the operating status of a pumping station. Through equidistantly distributed circular arc-shaped axial guide grooves on the outer wall of the cylindrical tube, the contact area between the outer tube and the airflow inside the air cooler is increased, and the airflow is guided smoothly along the axial direction, avoiding dead zones on the tube wall surface. This enhances the uniformity and efficiency of heat exchange, allowing the temperature signal to be quickly transmitted to the internal temperature sensing element. Furthermore, the integrally formed equidistantly distributed circular axial fins at the end further expand the heat exchange area at the end and are adapted to the axial extension direction of the guide grooves, forming a continuous flow path. This reduces wind resistance and airflow disturbance under high-speed airflow, avoiding temperature fluctuations caused by airflow turbulence. In addition, the guide grooves and axial fins are integral structures of the outer tube, without disrupting the conductive continuity of the metal outer tube. When the entire pumping station experiences… When electromagnetic waves irradiate the sensor, they not only pass through the outer casing but also through these outward-extending axial fins, thereby enhancing the eddy current loss effect on external electromagnetic waves, increasing the effective cross-sectional area of ​​the electromagnetic shielding layer, and the axial fins are equivalent to extending the "grounded outer casing" outward. At this time, the external induced current will form a larger range of eddy currents on the axial fins, thereby consuming more electromagnetic energy and playing a good role in protecting the internal structure and resisting interference. Finally, the axial fins form a "fence" structure in space, which has a certain physical reflection effect on electromagnetic waves, further improving the anti-interference performance, and can simultaneously maintain the integrity of electromagnetic shielding. It achieves synergistic optimization of heat exchange efficiency improvement and anti-interference performance guarantee, effectively adapts to the working environment of high-speed airflow in air coolers, and solves the problem of thermal response hysteresis of traditional sensors.

[0020] This invention provides a temperature sensor for monitoring the operating status of pumping stations. By winding two sets of platinum wires parallel to each other along the axis of a ceramic tube, with the pitch larger at both ends and smaller in the middle, it ensures sufficient contact between the wires and the magnesium oxide powder. The tight coupling of the two wires cancels out the induced signals generated by external electromagnetic interference on the two wires, forming a dual anti-interference system of "external shielding and internal cancellation." This avoids temperature signal distortion and data fluctuations, ensuring accurate temperature measurement even in strong electromagnetic environments. Simultaneously, two sets of spiral semi-enclosed fixing grooves on the outer circumference of the ceramic tube firmly limit the corresponding platinum wires, preventing wire displacement or wear under pumping station vibration. The expanded cavity structure in the middle of the ceramic tube allows the magnesium oxide powder to fully fill the interior. The magnesium oxide powder inside the outer casing, combined with the outer covering, forms a comprehensive insulating and heat-conducting network. This isolates the electrical connection between the platinum wires and the metal outer casing, preventing short-circuit faults, and rapidly conducts heat from the air cooler to the platinum wires, further improving the temperature measurement response speed. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 For the present invention Figure 1 A magnified structural diagram of point A in the middle.

[0024] Figure 3 This is a schematic diagram of the internal structure of the outer jacket after cross-section in this invention.

[0025] Figure 4 This is a schematic diagram of the structure of the outer tube in this invention after cross-section, without the interior filled with magnesium oxide powder.

[0026] Figure 5 This is a schematic diagram showing the distribution of the first and second platinum wires on the outer wall of the ceramic tube according to the present invention.

[0027] Figure 6 This is a schematic diagram of the overall structure of the ceramic tube after the first platinum wire conductor is split in this invention.

[0028] Figure 7 For the present invention Figure 6 A magnified structural diagram at point B in the middle.

[0029] Figure 8 This is a schematic diagram of the half-section planar structure of the ceramic tube of the present invention.

[0030] In the picture:

[0031] 1. Outer tube; 101. Circular tube section; 102. End; 2. Conductor sheath; 3. Ground wire; 5. Flow guide groove; 6. Axial fin; 7. Sealing layer; 8. Magnesium oxide powder; 9. Lead wire; 10. Ceramic tube; 11. Metal sheet; 12. Shorting wire; 13. First platinum wire conductor; 14. Second platinum wire conductor; 15. Fixing groove; 16. Cavity. Detailed Implementation

[0032] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0033] Please see Figures 1-8 A temperature sensor for monitoring the operating status of a pumping station includes an outer tube 1, inside which a ceramic tube 10 is disposed. A first platinum wire 13 and a second platinum wire 14 are respectively wound around the outer circumference of the ceramic tube 10. One end of the first platinum wire 13 is welded with a shorting wire 12, and the first platinum wire 13 is shorted to the second platinum wire 14 through the shorting wire 12.

[0034] A metal sheet 11 is welded to one end of both the first platinum wire 13 and the second platinum wire 14. A lead wire 9 is welded to one side of the metal sheet 11. A wire sheath 2 for protecting the lead wire 9 is fixedly connected to the bottom of the outer tube 1.

[0035] The outer casing 1 is filled with magnesium oxide powder 8 for insulating and heat-conducting electromagnetic signals. The outer casing 1 also has a sealing layer 7 to ensure internal sealing, effectively constructing a stable and reliable temperature sensing and signal transmission system. Specifically, two sets of platinum wires are shorted together by jumper wire 12 to form the core temperature sensing circuit, accurately sensing changes in the air cooler temperature and converting them into electrical signals. These signals are then conducted to the lead wire 9 via the metal sheet 11, ensuring stable temperature signal transmission. Furthermore, the wire sheath 2 effectively protects the lead wire 9, preventing wear or signal transmission interruption caused by pump station vibration, airflow impact, or other operating conditions. Secondly, the magnesium oxide powder 8 filling the outer casing 1 has both insulating and heat-conducting functions, isolating the platinum wires from the electrical connection between the platinum wires and the metal outer casing 1, preventing... The sensor prevents short circuits in strong electromagnetic environments and quickly transfers heat from the air cooler to the platinum wire, improving temperature response speed. It also helps reduce the impact of electromagnetic interference on the internal temperature sensing element. Furthermore, the sealing layer 7 achieves a tight seal inside the outer tube 1. Combined with the filling effect of magnesium oxide powder 8, it effectively prevents moisture intrusion in the high-humidity environment of the pump station, avoiding oxidation and corrosion of internal components such as the platinum wire and metal sheet 11, extending the sensor's service life and stable operation cycle. The overall structure is compact and functionally coordinated, laying the foundation for the sensor to achieve accurate and stable monitoring of the air cooler temperature under the harsh conditions of strong electromagnetic fields, high humidity, and high vibration in the pump station. It solves the problems of traditional sensors being susceptible to interference, insufficient sealing, and unstable signal transmission.

[0036] Furthermore, both the first platinum wire 13 and the second platinum wire 14 are spirally wound around the outer circumference of the ceramic tube 10. The first platinum wire 13 and the second platinum wire 14 are wound in parallel along the axial direction of the ceramic tube 10 and are spatially staggered. On the one hand, the spiral winding method increases the contact area between the platinum wire and the ceramic tube 10 and the magnesium oxide powder 8, which not only ensures sufficient heat transfer and allows the platinum wire to quickly sense the temperature change of the air cooler and improve the temperature measurement response speed, but also makes the wires more evenly distributed on the outer wall of the ceramic tube 10, ensuring the consistency of temperature measurement. On the other hand, the two platinum wires... The two wires are wound in parallel along the axis of the ceramic tube 10 and spaced out to form a tightly coupled double-wire structure. When the strong electromagnetic field of the pump station causes interference, the signals induced by the external electromagnetic interference on the two wires are similar in magnitude and phase. They cancel each other out in the series temperature measurement circuit, effectively weakening the influence of electromagnetic interference on the temperature measurement signal and improving the sensor's anti-interference capability in a strong electromagnetic environment. At the same time, the parallel staggered spiral structure avoids direct contact and short circuit between the two wires. Combined with the insulation characteristics of the ceramic tube 10, it further ensures the stability of the sensor's operation and is suitable for the harsh working conditions of the pump station with high interference and high vibration.

[0037] Furthermore, the pitch of the first platinum wire 13 and the second platinum wire 14 is distributed with a larger pitch at both ends and a smaller pitch in the middle. On the one hand, the larger pitch at both ends and a smaller pitch in the middle of the platinum wire allows for a higher winding density of the platinum wire in the middle of the ceramic tube 10. This increases the contact area between the central temperature sensing area and the magnesium oxide powder 8, allowing the core temperature sensing area to capture temperature changes more quickly and accurately, thus improving temperature sensing sensitivity. On the other hand, it avoids the risk of short circuits caused by excessively dense winding. Furthermore, the larger pitch at both ends provides space for the welding points between the wire and the metal sheet 11. The design provides ample space for welding operations during assembly, while reducing the impact of welding stress on the wires and ensuring the stability of signal transmission. In addition, this differentiated pitch design is adapted to the structural characteristics of the ceramic tube 10 and, in conjunction with the expanded-diameter cavity 16 in the middle of the ceramic tube 10, allows the magnesium oxide powder 8 to be filled more evenly in the gaps between the wires, further optimizing the insulation and heat conduction effect. At the same time, in the vibration environment of the pump station, it can reduce the stress concentration caused by uneven wire density, improve the fatigue resistance of the wires, extend the service life of the sensor, and ensure long-term stable operation under harsh working conditions.

[0038] Furthermore, the outer circumferential wall of the ceramic tube 10 is provided with two sets of fixing grooves 15. The first platinum wire 13 is correspondingly engaged inside one set of fixing grooves 15, and the second platinum wire 14 is correspondingly engaged inside the other set of fixing grooves 15. Each set of fixing grooves 15 is spiral-shaped to match the corresponding platinum wire, and each set of fixing grooves 15 forms a semi-enclosed limiting structure for the corresponding platinum wire. This firstly achieves precise positioning and stable installation of the platinum wire. The two sets of spiral fixing grooves 15 are precisely matched with the winding trajectory of the corresponding platinum wire, and the semi-enclosed limiting structure can firmly engage the two platinum wires respectively, preventing them from shifting, loosening, or entangled under the high vibration conditions of the pump station, thus ensuring the structural integrity of the temperature sensing circuit and the stability of signal transmission. Secondly, the semi-enclosed design provides reliable limiting for the wires without completely sealing them off, ensuring full contact between the platinum wires and the surrounding magnesium oxide powder 8. This avoids a decrease in thermal conductivity and insulation due to obstruction by the limiting structure, ensuring that heat can be quickly conducted to the wires while maintaining good electromagnetic shielding. In addition, the independent setting of the two sets of fixing slots 15 keeps the two platinum wires clearly separated in space, further avoiding the risk of short circuits caused by wire contact. Combined with the parallel and staggered winding method, it strengthens the "internal cancellation" anti-interference logic, making it easier for external electromagnetic interference to cancel out the induced signals on the two wires, improving temperature measurement accuracy. The overall structure is suitable for the harsh working conditions of pump stations, providing a reliable guarantee for the long-term stable operation of the sensor.

[0039] Furthermore, the ceramic tube 10 has an internal cavity 16 with a stepped structure that expands in the middle. The inner diameter of the cavity gradually increases from both ends along the middle. This firstly optimizes the internal heat conduction path and the filling effect of the magnesium oxide powder 8. The stepped cavity 16 with an expanded diameter in the middle of the ceramic tube 10 allows the magnesium oxide powder 8 to be filled more fully and evenly inside and outside the ceramic tube 10 and inside the cavity 16, forming a comprehensive insulating and heat-conducting network. This not only improves the efficiency of heat transfer from the outer tube 1 to the platinum wire, allowing the platinum wire to sense temperature changes more quickly, but also further enhances the insulation performance and avoids the risk of short circuits in strong electromagnetic environments. Secondly, the structure design with an expanded diameter in the middle is adapted to the distribution characteristics of the platinum wire with a large pitch at both ends and a small pitch in the middle, so that the filling density of the magnesium oxide powder 8 in the core temperature measuring area (middle) matches the wire winding density, ensuring temperature measurement sensitivity and uniformity.

[0040] Furthermore, the outer casing 1 includes a circular tube portion 101 and an end portion 102. The end portion 102 is bullet-shaped, with its tip pointing away from the wire sheath 2. This achieves precise adaptation to the high-speed airflow environment of the air cooler. Specifically, the bullet-shaped end portion 102 design can effectively divert the oncoming high-speed airflow, significantly reducing airflow resistance and avoiding turbulence and pressure loss caused by airflow impact in traditional cylindrical casings. This ensures stable sensor placement inside the air cooler. At the same time, the bullet-shaped structure reduces airflow stagnation on the surface of the end portion 102, preventing the formation of airflow dead zones and ensuring sufficient heat exchange in the end portion 102 area, allowing temperature signals to be quickly transmitted to the internal temperature sensing element.

[0041] Furthermore, the outer circumferential wall of the circular tube 101 is provided with equally spaced circular guide grooves 5. The cross-section of the guide grooves 5 is arc-shaped, and the guide grooves 5 extend along the axial direction of the circular tube 101. Through the equally spaced circular arc-shaped axial guide grooves 5 on the outer wall of the circular tube 101, the contact area between the outer tube 1 and the airflow inside the air cooler is increased, and the airflow is guided to flow smoothly along the axial direction, avoiding the formation of dead zones on the tube wall surface. This enhances the uniformity and efficiency of heat exchange, allowing the temperature signal to be quickly transmitted to the internal temperature sensing element.

[0042] Furthermore, the outer circumferential wall of the end portion 102 is integrally formed with axial fins 6. The axial fins 6 are evenly distributed in a circular pattern on the outer circumferential wall of the end portion 102, and extend along the axial direction of the end portion 102. The axial fins 6 and the guide channel 5 are located on the same horizontal plane, and the extension direction of the axial fins 6 is collinear with the extension direction of the guide channel 5. The equidistant circular distribution of the axial fins 6 integrally formed on the end portion 102 further expands the heat exchange area of ​​the end portion 102, and at the same time matches the axial extension direction of the guide channel 5 to form a continuous flow path, reducing wind resistance and airflow disturbance under high-speed airflow, and avoiding temperature fluctuations caused by airflow turbulence. In addition, the guide channel 5 and the axial fins 6 are both integral structures of the outer jacket 1, and will not destroy the conductive continuity of the metal outer jacket 1. When the electromagnetic waves generated by the entire pump station irradiate the transmission When the sensor is applied, it not only passes through the outer casing 1 but also through these outwardly extending axial fins 6, thereby enhancing the eddy current loss effect against external electromagnetic waves, increasing the effective cross-sectional area of ​​the electromagnetic shielding layer, and the axial fins 6 are equivalent to extending the "grounded outer casing 1" outward. At this time, the external induced current will form a larger range of eddy currents on the axial fins 6, thereby consuming more electromagnetic energy and playing a good role in protecting the internal structure and resisting interference. Finally, the axial fins 6 form a "fence" structure in space, which has a certain physical reflection effect on electromagnetic waves, further improving the anti-interference performance, and can simultaneously maintain the integrity of electromagnetic shielding. It achieves synergistic optimization of heat exchange efficiency improvement and anti-interference performance guarantee, effectively adapts to the working environment of high-speed airflow in air coolers, and solves the problem of thermal response hysteresis of traditional sensors.

[0043] Furthermore, a ground wire 3 is welded to the bottom outer wall of the outer sleeve 1. One end of the ground wire 3 is electrically connected to the outer sleeve 1, and the end of the ground wire 3 away from the outer sleeve 1 is used to electrically connect to the external grounding terminal. The outer sleeve 1 is electrically connected to the external grounding terminal through the ground wire 3 welded to the bottom, forming a complete electromagnetic shield. This shield can guide the interference current induced by the strong electromagnetic field generated by the high-power unit of the pump station to the ground and block the intrusion of electromagnetic interference from the outside.

[0044] In summary, with the help of the above-mentioned technical solution of the present invention, when in use, the staff first installs the sensor inside the air cooler of the pump station. During the process of the temperature sensor monitoring the temperature inside the air cooler, the airflow speed inside the air cooler is too fast. At this time, by pointing the bullet-shaped outer tube 1 end 102 toward the airflow direction, it can adapt to the high-speed airflow environment to reduce wind resistance and avoid the airflow dead zone that is easy to be generated by the traditional cylindrical shell.

[0045] Meanwhile, the equidistantly distributed arc-shaped axial guide grooves 5 on the outer wall of the circular tube 101 increase the contact area between the outer tube 1 and the airflow inside the air cooler, and guide the airflow smoothly along the axial direction, avoiding dead zones on the tube wall surface. This enhances the uniformity and efficiency of heat exchange, allowing temperature signals to be quickly transmitted to the internal temperature sensing element. On the other hand, the equidistantly distributed axial fins 6 integrally formed at the end 102 further expand the heat exchange area of ​​the end 102, and are adapted to the axial extension direction of the guide grooves 5 to form a continuous guide path, reducing wind resistance and airflow disturbance under high-speed airflow, and avoiding temperature fluctuations caused by airflow turbulence. In addition, the guide grooves 5 and the axial fins 6 are both integral structures of the outer tube 1, and do not disrupt the conductive continuity of the metal outer tube 1. When the electromagnetic waves generated by the entire pump station... When the light shines on the sensor, it not only passes through the outer sleeve 1, but also through these outwardly extending axial fins 6, thereby enhancing the eddy current loss effect on external electromagnetic waves, increasing the effective cross-sectional area of ​​the electromagnetic shielding layer, and the axial fins 6 are equivalent to extending the "grounded outer sleeve 1" outward. At this time, the external induced current will form a larger range of eddy currents on the axial fins 6, thereby consuming more electromagnetic energy and playing a good role in protecting the internal structure and resisting interference. Finally, the axial fins 6 form a "fence" structure in space, which has a certain physical reflection effect on electromagnetic waves, further improving the anti-interference performance, and can simultaneously maintain the integrity of electromagnetic shielding. It achieves synergistic optimization of heat exchange efficiency improvement and anti-interference performance guarantee, effectively adapts to the working environment of high-speed airflow of air cooler, and solves the problem of thermal response lag of traditional sensors.

[0046] Subsequently, the outer casing 1 is electrically connected to the external grounding terminal through the ground wire 3 welded at the bottom, forming a complete electromagnetic shield. This shield can guide the interference current induced by the strong electromagnetic field generated by the high-power unit of the pump station to the ground, thus blocking the intrusion of electromagnetic interference from the outside.

[0047] During the operation of the temperature sensor, the two sets of platinum wires inside are wound in parallel along the axis of the ceramic tube 10 and spatially staggered, with a pitch distribution that is larger at both ends and smaller in the middle. This ensures sufficient contact between the wires and the magnesium oxide powder 8, and the tight coupling of the two wires cancels out the induced signals generated by external electromagnetic interference on the two wires, forming a dual anti-interference system of "external shielding and internal cancellation." This avoids temperature signal distortion and data fluctuation, ensuring temperature measurement accuracy in strong electromagnetic environments. At the same time, the two sets of spiral semi-enclosed fixing grooves 15 on the outer circumference of the ceramic tube 10 can firmly limit the corresponding platinum wires, preventing wire displacement or wear under pump station vibration. The cavity 16 structure with an expanded diameter in the middle of the ceramic tube 10 allows the magnesium oxide powder 8 to be fully filled into the ceramic tube 10. At this time, the outer sleeve... The magnesium oxide powder filling inside tube 1, combined with the magnesium oxide powder 8 covering the outside, forms a comprehensive insulating and heat-conducting network. This not only isolates the electrical connection between the platinum wire and the metal outer tube 1, preventing short-circuit faults, but also quickly conducts heat from the air cooler to the platinum wire, further improving the temperature measurement response speed. The magnesium oxide powder 8, together with the dense sealing layer 7, effectively blocks the intrusion of water vapor in the high-humidity environment of the pumping station, preventing oxidation and corrosion of internal components and extending the service life of the sensor. Finally, the platinum wire conducts the temperature signal to the lead wire 9 through the metal sheet 11. Under the protection of the wire sheath 2, the lead wire 9 is protected from wear and interference, stably outputting temperature measurement data. This enables real-time and accurate monitoring of the air cooler temperature, providing reliable protection for the safe operation of the pumping station unit and avoiding unit failures or unnecessary shutdowns due to abnormal temperatures.

[0048] The above description is only a preferred embodiment of the present invention and is 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 temperature sensor for monitoring the operating status of a pumping station, comprising an outer sheath (1), characterized in that, The outer tube (1) is provided with a ceramic tube (10) inside. The outer circumference of the ceramic tube (10) is respectively wound with a first platinum wire (13) and a second platinum wire (14). One end of the first platinum wire (13) is welded with a shorting wire (12). The first platinum wire (13) and the second platinum wire (14) are shorted together through the shorting wire (12). One end of the first platinum wire (13) and the second platinum wire (14) are both welded with a metal sheet (11), and a lead wire (9) is welded to one side of the metal sheet (11). A wire sheath (2) for protecting the lead wire (9) is fixedly connected to the bottom of the outer tube (1). The outer tube (1) is filled with magnesium oxide powder (8) for insulating and conducting heat for electromagnetic signals. The outer tube (1) is provided with a sealing layer (7) to ensure internal sealing. The first platinum wire (13) and the second platinum wire (14) are spirally wound on the outer circumference of the ceramic tube (10). The first platinum wire (13) and the second platinum wire (14) are wound in parallel along the axial direction of the ceramic tube (10) and are spatially staggered. The pitch of the first platinum wire (13) and the second platinum wire (14) is distributed in a pattern that is large at both ends and small in the middle. The ceramic tube (10) has a cavity (16) inside. The cavity (16) has a stepped structure with an expanded diameter in the middle, and its inner diameter gradually increases from both ends along the middle direction.

2. The temperature sensor for monitoring the operating status of a pumping station according to claim 1, characterized in that, The ceramic tube (10) has two sets of fixing grooves (15) on its outer circumference. The first platinum wire (13) is correspondingly engaged in the interior of one set of fixing grooves (15), and the second platinum wire (14) is correspondingly engaged in the interior of the other set of fixing grooves (15). Each set of fixing grooves (15) is spiral-shaped to match the corresponding platinum wire, and each set of fixing grooves (15) forms a semi-enclosed limiting structure for the corresponding platinum wire.

3. A temperature sensor for monitoring the operating status of a pumping station according to claim 2, characterized in that, The outer sheath (1) includes a round tube portion (101) and an end portion (102), the end portion (102) being bullet-shaped, with the tip of the end portion (102) facing away from the conductor sheath (2).

4. A temperature sensor for monitoring the operating status of a pumping station according to claim 3, characterized in that, The outer circumferential wall of the circular tube (101) is provided with equally spaced circular guide grooves (5), the cross-section of the guide grooves (5) is arc-shaped, and the guide grooves (5) extend along the axial direction of the circular tube (101).

5. A temperature sensor for monitoring the operating status of a pumping station according to claim 4, characterized in that, The circumferential outer wall of the end (102) is integrally formed with axial fins (6), which are distributed in a circular pattern at equal intervals on the circumferential outer wall of the end (102) and extend along the axial direction of the end (102).

6. A temperature sensor for monitoring the operating status of a pumping station according to claim 5, characterized in that, The axial fin (6) and the guide groove (5) are located on the same horizontal plane, and the extension direction of the axial fin (6) is collinear with the extension direction of the guide groove (5).

7. A temperature sensor for monitoring the operating status of a pumping station according to claim 6, characterized in that, A ground wire (3) is welded to the bottom outer wall of the outer sleeve (1). One end of the ground wire (3) is electrically connected to the outer sleeve (1), and the end of the ground wire (3) away from the outer sleeve (1) is used to be electrically connected to an external grounding terminal.

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