A device for detecting the temperature of a heating surface of a boiler

Abstract

The utility model discloses a kind of detection devices of boiler heating surface temperature, it is related to temperature detection technical field, including upper protection tube and lower protection tube, lower protection tube is located below upper protection tube, the lower part of upper protection tube is fixedly provided with anti-drop ring, spring lead wire is installed in upper protection tube and lower protection tube, the upper portion of lower protection tube is provided with mounting thread, upper protection tube and lower protection tube are connected by internal thread pipe, by setting the upper protection tube and lower protection tube of mutual separation, and setting anti-drop ring on upper protection tube, setting mounting thread on the upper portion of lower protection tube, setting spring lead wire in upper protection tube and lower protection tube, setting internal thread pipe on upper protection tube, lower protection tube and anti-drop ring, internal thread pipe rotates on upper protection tube and anti-drop ring, simultaneously fixed lower protection tube makes it not rotate with internal thread pipe, the interval of upper protection tube and lower protection tube can be adjusted, to reach the purpose of adjusting thermistor temperature sensor length.

Description

Technical Field

[0001] This utility model relates to the field of temperature detection technology, and in particular to a device for detecting the temperature of a boiler heating surface. Background Technology

[0002] The boiler heating surface is the core heat exchange component of the boiler, including water-cooled walls, superheaters, and reheaters. It directly contacts high-temperature flue gas and completes heat transfer, and its operating status directly affects the boiler's efficiency and safety. The temperature of the boiler heating surface is a key parameter reflecting the boiler's operating status. Excessive temperature can easily lead to component burnout, deformation, or tube rupture, while abnormal temperature may cause problems such as decreased thermal efficiency and energy waste. Therefore, detecting the heating surface temperature is crucial for the stable operation of the boiler. Resistance temperature sensors (RTS) are commonly used devices for detecting the temperature of boiler heating surfaces. Their core structure includes a temperature-sensing resistor, wires, a protective tube, and a junction box. The temperature-sensing resistor, as the core sensing element, utilizes the characteristic that the resistance of a metal conductor changes with temperature to achieve temperature sensing. The protective tube is used to isolate the temperature-sensing element from harsh environments such as high-temperature flue gas and dust. The wires transmit the resistance signal to the junction box, and then connect to an external measuring instrument via a cable to complete data reading. When installing this type of sensor, a fixing structure is usually needed to attach or insert the protective tube into the detection area near the boiler heating surface, allowing the temperature-sensing resistor to sense the temperature changes of the heating surface in real time.

[0003] Traditional resistance temperature detectors (RTDs) are mostly fixed in length and non-adjustable. In practical applications, different models and specifications of boilers have different installation positions and spatial layouts of their heating surfaces, and the depth requirements for different detection points on the same boiler also vary. Fixed-length sensors are difficult to adapt to diverse installation scenarios. When the detection point is deep, the sensor length is insufficient to reach the effective detection area; when the detection point is shallow, an excessively long sensor will be redundantly exposed, making it susceptible to damage from external impacts and potentially affecting detection accuracy due to uneven heat dissipation. Therefore, this application proposes a boiler heating surface temperature detection device to solve the above problems. Utility Model Content

[0004] The main objective of this invention is to provide a device for detecting the temperature of a boiler heating surface, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A device for detecting the temperature of a boiler heating surface includes an upper protective tube and a lower protective tube. The lower protective tube is located below the upper protective tube. An anti-detachment ring is fixedly sleeved on the lower part of the upper protective tube. Spring wires are installed inside the upper and lower protective tubes. An installation thread is provided on the upper part of the lower protective tube. The upper and lower protective tubes are connected by an internally threaded tube. The internally threaded tube is rotatably sleeved on the anti-detachment ring and is also installed at the installation thread provided on the upper part of the lower protective tube.

[0006] Preferably, a junction box is fixedly installed on the upper part of the upper protective tube, a cable is fixedly installed inside the junction box, and a mounting fastener is fixedly sleeved on the lower part of the upper protective tube.

[0007] Preferably, a temperature-sensing resistor is fixedly installed on the lower inner wall of the lower protective tube. The temperature-sensing resistor is fixedly connected to one end of the spring wire, and the other end of the spring wire is fixedly connected to the cable in the junction box.

[0008] Preferably, the anti-detachment ring is located below the mounting fastener.

[0009] Preferably, the internally threaded tube is located below the mounting fastener, and an annular mounting groove is formed on the upper inner wall of the internally threaded tube.

[0010] Preferably, the upper part of the internally threaded tube is rotatably sleeved on the lower part of the upper protective tube, and the internally threaded tube is simultaneously rotatably sleeved on the anti-detachment ring through the annular mounting groove.

[0011] Compared with the prior art, the present invention has the following beneficial effects: By setting up separate upper and lower protective tubes, with an anti-detachment ring on the upper protective tube and an installation thread on the upper part of the lower protective tube, and spring wires inside both protective tubes, and internally threaded tubes on the upper and lower protective tubes and the anti-detachment ring, the spacing between the upper and lower protective tubes can be adjusted. This allows for adjustment of the length of the thermal resistance temperature sensor, adapting to the installation requirements of different boilers and detection points, avoiding detection failures or accuracy issues caused by incompatible sensor lengths. The presence of the spring wires ensures smooth spacing adjustment between the upper and lower protective tubes, guaranteeing a stable connection between the temperature-sensing resistor and the cable in the junction box, and ensuring uninterrupted temperature signal transmission. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure of this utility model after the internal threaded pipe has been removed and the lower part of the lower protective pipe has been partially cut out. Figure 3 This is a schematic diagram showing the positional relationship between the internally threaded pipe, the upper protective pipe, and the anti-detachment ring after the pipe is cut apart according to this utility model. Figure 4 For the present utility model Figure 3 A magnified view of point A.

[0013] In the diagram: 1. Upper protective tube; 2. Lower protective tube; 3. Internally threaded tube; 4. Mounting fastener; 5. Anti-detachment ring; 6. Junction box; 7. Spring wire; 8. Temperature sensing resistor; 9. Mounting thread; 10. Annular mounting groove. Detailed Implementation

[0014] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0015] Please see Figure 1 - Figure 4 As shown, a boiler heating surface temperature detection device includes an upper protective tube 1 and a lower protective tube 2. The lower protective tube 2 is located below the upper protective tube 1. An anti-detachment ring 5 is fixedly sleeved on the lower part of the upper protective tube 1. Spring wires 7 are installed inside the upper protective tube 1 and the lower protective tube 2. An installation thread 9 is provided on the upper part of the lower protective tube 2. The upper protective tube 1 and the lower protective tube 2 are connected by an internally threaded tube 3. The internally threaded tube 3 is rotatably sleeved on the anti-detachment ring 5. The internally threaded tube 3 is also installed at the installation thread 9 on the upper part of the lower protective tube 2. By setting up the upper protective tube 1 and the lower protective tube 2, which are separate from each other, and by setting an anti-detachment ring 5 on the upper protective tube 1 and an installation thread 9 on the upper part of the lower protective tube 2, the device can effectively detect the temperature of the boiler heating surface. A spring wire 7 is installed inside, and an internally threaded tube 3 is installed on the upper protective tube 1, the lower protective tube 2, and the anti-detachment ring 5. The internally threaded tube 3 rotates on the upper protective tube 1 and the anti-detachment ring 5, while fixing the lower protective tube 2 so that it does not rotate with the internally threaded tube 3. This allows for adjustment of the distance between the upper protective tube 1 and the lower protective tube 2, thereby achieving the purpose of adjusting the length of the thermal resistance temperature sensor. This adapts to the installation requirements of different boilers and different detection points, avoiding detection failure or accuracy issues caused by incompatible sensor lengths. The presence of the spring wire 7 ensures that the distance between the upper protective tube 1 and the lower protective tube 2 can be smoothly adjusted, guaranteeing a stable connection between the temperature sensing resistor 8 and the cable inside the junction box 6, and ensuring that the temperature signal transmission is not affected.

[0016] Specifically, a junction box 6 is fixedly installed on the upper part of the upper protective pipe 1, and a cable is fixedly installed inside the junction box 6. A mounting fastener 4 is fixedly sleeved on the lower part of the upper protective pipe 1. A temperature sensing resistor 8 is fixedly installed on the lower inner wall of the lower protective pipe 2. The temperature sensing resistor 8 is fixedly connected to one end of the spring wire 7, and the other end of the spring wire 7 is fixedly connected to the cable inside the junction box 6. The anti-detachment ring 5 is located below the mounting fastener 4, and the internally threaded pipe 3 is located below the mounting fastener 4. An annular mounting groove 10 is opened on the upper inner wall of the internally threaded pipe 3. The upper part of the internally threaded pipe 3 is rotatably sleeved on the lower part of the upper protective pipe 1. The internally threaded pipe 3 is also rotatably sleeved on the anti-detachment ring 5 through the annular mounting groove 10. Before installing this device, the length needs to be adjusted according to the depth requirements of the boiler detection point. The specific operation is to hold the internally threaded pipe 3 and rotate it on the upper protective pipe 1 and the anti-detachment ring 5. The cooperation between the anti-detachment ring 5 and the annular mounting groove 10 can prevent the internally threaded pipe 3 from detaching from the upper protective pipe 1. Protective tube 1 is installed, and the lower protective tube 2 is fixed to prevent it from rotating with the internally threaded tube 3. Then, during the rotation of the internally threaded tube 3, the internally threaded tube 3 will rotate relative to the lower protective tube 2. Since the internally threaded tube 3 and the lower protective tube 2 are connected by threads, the distance between the upper protective tube 1 and the lower protective tube 2 will change when the internally threaded tube 3 is rotated. At this time, the spring wire 7 will extend and retract accordingly with the change in distance to ensure the stable connection between the temperature sensing resistor 8 and the cable in the junction box 6. After adjusting to the appropriate length, stop rotating the internally threaded tube 3. At this time, the length adjustment of the thermal resistance temperature sensor is completed. Then, the thermal resistance temperature sensor is installed. The thermal resistance temperature sensor with the adjusted length is fixed to the preset installation position of the boiler through the mounting fastener 4. Ensure that the lower end of the lower protective tube 2 carrying the temperature sensing resistor 8 accurately extends into the detection area and fits the designated position near the boiler heating surface. After the installation and fixing are completed, the cable in the junction box 6 is connected to the external detection instrument.

[0017] Furthermore, the detection principle of this resistance temperature sensor is that the temperature sensing resistor 8 directly senses the temperature change of the boiler's heating surface. Utilizing the characteristic that the resistance value of a metal conductor changes with temperature, the resistance value of the temperature sensing resistor 8 will change accordingly with the change in the temperature of the heating surface. The changing resistance signal is transmitted through the spring wire 7 to the cable in the junction box 6, and then transmitted by the cable to the external detection instrument. The external detection instrument processes and converts the received resistance signal, and finally presents the real-time temperature data of the boiler's heating surface, thus achieving accurate detection of the boiler's heating surface temperature.

[0018] It should be noted that the anti-detachment ring 5 and the internal threaded tube 3 are both made of high-temperature resistant materials, which can effectively resist the influence of high-temperature flue gas and heat conducted by the heated surface, avoid deformation and damage of components due to high temperature, and thus ensure the reliable realization of the device length adjustment function and the continuous accuracy of temperature detection.

[0019] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A device for detecting the temperature of a boiler heating surface, characterized in that: It includes an upper protective tube (1) and a lower protective tube (2). The lower protective tube (2) is located below the upper protective tube (1). The lower part of the upper protective tube (1) is fixedly fitted with an anti-detachment ring (5). Spring wires (7) are installed inside the upper protective tube (1) and the lower protective tube (2). The upper part of the lower protective tube (2) is provided with an installation thread (9). The upper protective tube (1) and the lower protective tube (2) are connected by an internal threaded tube (3). The internal threaded tube (3) is rotatably fitted on the anti-detachment ring (5). The internal threaded tube (3) is also installed at the installation thread (9) provided on the upper part of the lower protective tube (2).

2. The boiler heating surface temperature detection device according to claim 1, characterized in that: A junction box (6) is fixedly installed on the upper part of the upper protective tube (1), and a cable is fixedly installed inside the junction box (6). An installation fastener (4) is fixedly sleeved on the lower part of the upper protective tube (1).

3. The boiler heating surface temperature detection device according to claim 2, characterized in that: A temperature-sensing resistor (8) is fixedly installed on the lower inner wall of the lower protective tube (2). The temperature-sensing resistor (8) is fixedly connected to one end of the spring wire (7), and the other end of the spring wire (7) is fixedly connected to the cable in the junction box (6).

4. The boiler heating surface temperature detection device according to claim 3, characterized in that: The anti-detachment ring (5) is located below the mounting fastener (4).

5. The boiler heating surface temperature detection device according to claim 4, characterized in that: The internally threaded tube (3) is located below the mounting fastener (4), and an annular mounting groove (10) is provided on the upper inner wall of the internally threaded tube (3).

6. The boiler heating surface temperature detection device according to claim 5, characterized in that: The upper part of the internally threaded tube (3) is rotatably sleeved on the lower part of the upper protective tube (1), and the internally threaded tube (3) is simultaneously rotatably sleeved on the anti-detachment ring (5) through the annular mounting groove (10).

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