Temperature control system of sensor

Abstract

The utility model relates to the technical field of temperature control equipment, and discloses a temperature control system of a sensor, which comprises a temperature sensor used for monitoring the temperature of a shaft displacement and rotating speed sensor, and a plurality of branch pipes with outlet ends facing the shaft displacement and rotating speed sensor, and the plurality of branch pipes are communicated with a cooling air source through a connected main pipe. The main pipe is connected with a pneumatic control valve for controlling the air flow; the device effectively improves the cooling effect, and solves the problems of shaft displacement and environment temperature of the rotating speed sensor.

Description

Technical Field

[0001] This utility model relates to the field of temperature control equipment technology, specifically to a sensor-based temperature control system. Background Technology

[0002] The #2 bearing of the SAIC 1,000 MW ultra-supercritical double reheat turbine unit houses the turbine's most critical shaft displacement and overspeed protection sensors. Because this area is located near the high-pressure cylinder shaft seal and high-temperature metal components of the turbine, and this unit model suffers from a common shaft seal leakage problem, the temperature in this area reaches 130℃ during unit operation, almost reaching the sensor's maximum design temperature resistance. Therefore, the shaft displacement and speed sensors operate in a high-temperature environment for extended periods, leading to aging and malfunctions in the probes and extension cables. Given the high cost of these sensors and their crucial role in the unit's protection, resolving this challenge is of great significance for unit safety and reducing equipment maintenance costs.

[0003] The existing cooling method for the ambient temperature at the bearing of the #2 unit of the SAIC 1000 MW ultra-supercritical double reheat unit in the power plant is axial flow cooling fan cooling, which has a wide air supply range but relatively low air pressure. Please refer to [link / reference]. Figure 2 This type of unit suffers from a common problem of shaft seal leakage at bearing #2, with a significant amount of leakage. The space in this area has a certain positive pressure, and due to the limited airflow of the axial cooling fan, the airflow cannot cover the entire area around the sensor. This type of cooling method is ineffective in confined spaces or areas with poor airflow, failing to facilitate air exchange and remove heat. It cannot effectively reduce the ambient temperature around the sensor, and without a temperature sensor, it cannot monitor the ambient temperature in real time and make corresponding adjustments to the fan. Utility Model Content

[0004] The purpose of this invention is to provide a temperature control system for sensors that effectively improves cooling performance and solves the environmental temperature problem of shaft displacement and speed sensors.

[0005] This utility model is implemented as follows:

[0006] A temperature control system for a sensor includes a temperature sensor for monitoring the temperature of a shaft displacement and speed sensor, and multiple branch pipes with their outlets facing the shaft displacement and speed sensor. The multiple branch pipes are all connected to a cooling air source through a main pipe, and the main pipe is connected to a pneumatic regulating valve for controlling the airflow.

[0007] Furthermore, the temperature sensor is a thermocouple.

[0008] Furthermore, there are four branch pipes, with two branch pipes respectively positioned opposite each other on both sides for axial displacement and speed sensors.

[0009] Furthermore, the main pipe has a diameter of DN32, and the branch pipe has a diameter of φ14.

[0010] Furthermore, both the temperature sensor and the pneumatic regulating valve are connected to the controller.

[0011] Furthermore, the controller is connected to an alarm for over-temperature alarm.

[0012] Furthermore, it also includes a cooling fan with multiple air outlets positioned directly opposite the axial displacement and speed sensors.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention provides cooling gas that can cover the environment of the area where the shaft displacement and speed sensors are located, and monitors the actual temperature of the temperature control system in real time, effectively improving the cooling effect and solving the environmental temperature problem of the shaft displacement and speed sensors. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the existing technology.

[0018] Reference numerals in the attached diagram: 1. Bearing; 2. Shaft displacement and speed sensor; 3. Temperature sensor; 4. Branch pipe; 5. Main pipe; 6. Pneumatic regulating valve; 7. Cooling fan. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] Please see Figure 1 A temperature control system for a sensor includes a temperature sensor 3 for monitoring the temperature of a shaft displacement and speed sensor 2, and multiple branch pipes 4 with their outlets facing the shaft displacement and speed sensor 2. The multiple branch pipes 4 are all connected to a cooling air source through a main pipe 5. The main pipe 5 is connected to a pneumatic regulating valve 6 for controlling the airflow.

[0021] Please see Figure 1 The temperature sensor 3 is a thermocouple.

[0022] Please see Figure 1 The number of branch pipes 4 is four, and the axial displacement and speed sensors 2 on both sides are respectively arranged opposite two of the branch pipes 4.

[0023] Please see Figure 1 The main pipe 5 has a diameter of DN32, and the branch pipe 4 has a diameter of φ14.

[0024] Please see Figure 1 The temperature sensor 3 and the pneumatic regulating valve 6 are both connected to the controller.

[0025] Please see Figure 1 The controller is connected to an alarm for over-temperature alarm.

[0026] Please see Figure 1 It also includes a cooling fan 7 with multiple air outlets facing the axial displacement and speed sensor 2.

[0027] In practical applications, shaft displacement and speed sensors 2 are installed on both sides of one end of bearing 1. The outlet end of branch pipe 4 is positioned directly opposite shaft displacement and speed sensors 2, outputting cooling gas to them. This cooling airflow covers the shaft displacement and speed sensors 2 and the surrounding environment, achieving temperature-controlled cooling of the area where the sensors 2 are located. The operator sets the temperature via the controller, and the temperature sensor 3 monitors the temperature of the area where the shaft displacement and speed sensors 2 are located in real time. The temperature sensor 3 transmits the collected temperature data to the controller. The controller calculates the difference between the set and collected temperatures and controls the opening of the pneumatic regulating valve 6 based on this difference, thereby achieving precise temperature control of the area monitored by the temperature sensor 3. The controller is also connected to a display and an alarm. The display shows the set data, collected data, and opening data. When the collected temperature exceeds the alarm value, the controller activates the alarm to notify the monitoring personnel of the over-temperature. A filter and pressure reducing device is connected to the input end of the pneumatic regulating valve 6. The main pipe 5 has a diameter of DN32, and the branch pipe 4 has a diameter of φ14, which facilitates installation in confined spaces. Axial flow cooling fan 7 further assists in cooling. The cooling gas in this invention can cover the environment around the shaft displacement and speed sensor 2, and the actual temperature is monitored in real time, effectively improving the cooling effect and solving the environmental temperature problem of the shaft displacement and speed sensor 2.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A temperature control system for a sensor, characterized in that: It includes a temperature sensor (3) for monitoring the temperature of the shaft displacement and speed sensor (2), and multiple branch pipes (4) with their outlets facing the shaft displacement and speed sensor (2). The multiple branch pipes (4) are connected to the cooling air source through a main pipe (5), and the main pipe (5) is connected to a pneumatic regulating valve (6) for controlling the airflow.

2. The temperature control system for a sensor according to claim 1, characterized in that, The temperature sensor (3) is a thermocouple.

3. The temperature control system for a sensor according to claim 1, characterized in that, The number of branch pipes (4) is four, and two of the branch pipes (4) are respectively arranged opposite each other on both sides of the shaft displacement and speed sensor (2).

4. The temperature control system for a sensor according to claim 1, characterized in that, The main pipe (5) has a diameter of DN32, and the branch pipe (4) has a diameter of φ14.

5. The temperature control system for a sensor according to claim 1, characterized in that, The temperature sensor (3) and the pneumatic regulating valve (6) are both connected to the controller.

6. The temperature control system for a sensor according to claim 5, characterized in that, The controller is connected to an alarm for over-temperature alarm.

7. The temperature control system for a sensor according to claim 1, characterized in that, It also includes a cooling fan (7) with multiple air outlets facing the shaft displacement and speed sensor (2).

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