Boiler interior monitoring device

Abstract

The utility model belongs to the technical field of boiler, disclose a hearth inside monitoring devices, include: feeler rod, the head of feeler rod can stretch into or quit hearth, range sensor, set up in the head of feeler rod, range sensor can emit detection signal upward to measure the distance between the coke block in hearth and feeler rod whether satisfy preset distance, control box, feeler rod and range sensor all electricity is connected in control box, control box is configured as control feeler rod head in the distance between coke block in hearth and feeler rod does not satisfy preset distance when quit hearth. The utility model can effectively avoid that coke block smashes feeler rod, is favorable to reduce the damage rate of feeler rod, also is favorable to reduce the situation that the boiler operation rhythm is influenced because of feeler rod damage.

Description

Technical Field

[0001] This utility model relates to the field of boiler technology, and in particular to a furnace internal monitoring device. Background Technology

[0002] In a power plant's production system, the boiler is a key piece of equipment for energy conversion, and the furnace, as the core combustion chamber of the boiler, directly affects the efficiency and safety of the entire unit. To monitor the combustion situation inside the furnace in real time, staff typically insert a flame television probe into the furnace to provide important information for the stable operation of the boiler.

[0003] However, due to the high-temperature environment and fuel combustion characteristics inside the furnace, coke deposits easily form inside the furnace (such as on the furnace walls and heating surfaces). These coke deposits gradually thicken over time and are likely to detach under their own weight, airflow impact, or combustion vibration. When the probe is in the detection position inside the furnace, the detached coke deposits may directly hit the probe, causing damage and potentially disrupting the normal operation of the boiler.

[0004] Therefore, there is an urgent need to develop a furnace internal monitoring device to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a furnace internal monitoring device that can effectively prevent coke from damaging the probe rod, thereby reducing the damage rate of the probe rod and minimizing the impact on boiler operation rhythm caused by probe rod damage.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a furnace interior monitoring device, comprising:

[0008] A probe rod, the head of which can extend into or out of the furnace;

[0009] A distance sensor is installed at the head of the probe rod. The distance sensor can emit a detection signal upward to measure whether the distance between the coke block in the furnace and the probe rod meets the preset distance.

[0010] The control box is electrically connected to both the probe and the ranging sensor. The control box is configured to control the probe head to exit the furnace when the distance between the probe head and the coke block in the furnace does not meet a preset distance, and to control the probe head to re-enter the furnace after the exit action lasts for a preset time.

[0011] In some embodiments, the probe rod has a clearance hole on its side wall, and the distance sensor is disposed inside the clearance hole. The working surface of the distance sensor is flush with the outer surface of the probe rod's side wall.

[0012] In some embodiments, the probe is provided with a mounting bracket, which is configured to extend to the clearance hole, and the ranging sensor is connected to the mounting bracket.

[0013] In some embodiments, the furnace internal monitoring device further includes a temperature measuring element and a cooling assembly; the probe has a receiving cavity inside, the temperature measuring element is disposed in the receiving cavity at the head of the probe, the temperature measuring element is electrically connected to the control box and is used to detect the temperature of the probe head; the cooling assembly includes a delivery pipe and a cooling valve, the delivery pipe is connected to the receiving cavity and is used to deliver a cooling medium into the receiving cavity, the cooling valve is disposed in the delivery pipe and is electrically connected to the control box, and the cooling valve is configured to increase the valve opening when the temperature of the probe head is higher than a preset temperature.

[0014] In some embodiments, the control box is further provided with a delay control component, which is electrically connected to both the temperature measuring element and the cooling valve. If the temperature of the probe head is still higher than the preset temperature after the cooling valve increases its opening and continues for a preset time, the delay control component is configured to control the probe head to exit the furnace.

[0015] In some embodiments, the control box is provided with a digital display control table, which includes a temperature display section and an alarm indicator light. The temperature display section is used to display the temperature value of the probe head, and the alarm indicator light is configured to light up when the temperature of the probe head is higher than the preset temperature.

[0016] In some embodiments, the digital display control table further includes a first indicator light and a second indicator light, wherein the first indicator light is configured to illuminate when the probe head extends into the furnace and moves to the detection position, and the second indicator light is configured to illuminate after the probe head exits the furnace.

[0017] In some embodiments, the cooling medium is compressed air.

[0018] In some embodiments, the furnace interior monitoring device further includes a first camera and a second camera. Both the first camera and the second camera are electrically connected to the control box, which is electrically connected to a host computer. The first camera is connected to a first lens, and the second camera is connected to a second lens. Both the first lens and the second lens are disposed on the head of the probe rod, and the observation directions of the first lens and the second lens correspond to the two opposite furnace walls of the furnace, respectively.

[0019] In some embodiments, the probe is connected to a driving device, which includes a drive motor, a conveyor chain, and a guide rail. The conveyor chain and the guide rail are respectively disposed on the upper and lower sides of the probe and both extend along the axial direction of the probe. The probe is connected to the conveyor chain and the guide rail. The drive motor is used to drive the conveyor chain to move, thereby causing the probe to reciprocate along its own axial direction.

[0020] The beneficial effects of this utility model are:

[0021] The furnace internal monitoring device provided by this utility model can monitor the distance between the coke block and the probe rod in real time by setting a distance sensor at the head of the probe rod. When the distance does not meet the preset distance, the control box can control the probe rod to withdraw from the furnace in time, which can effectively prevent the coke block from damaging the probe rod, which is conducive to reducing the damage rate of the probe rod and also helps to reduce the impact on the boiler operation rhythm caused by the damage of the probe rod. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the furnace internal monitoring device provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure of the digital display control table provided in this embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the first and second lenses provided in an embodiment of the present utility model;

[0026] Figure 4 This is a schematic diagram of the drive device and probe provided in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Probe; 10. Receiving cavity; 11. Clearance hole; 12. Mounting bracket;

[0029] 2. Distance sensor;

[0030] 3. Control box; 31. Digital display control table; 311. Temperature display unit; 312. Alarm indicator light; 313. First indicator light; 314. Second indicator light;

[0031] 4. Temperature sensing element;

[0032] 5. Cooling components; 51. Conveying pipes; 52. Cooling valves;

[0033] 6. First camera; 61. First lens;

[0034] 7. Second camera; 71. Second lens;

[0035] 8. Drive unit; 81. Drive motor; 82. Conveyor chain; 83. Guide rail;

[0036] 9. Host computer;

[0037] 100. Burner. Detailed Implementation

[0038] 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 some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0040] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0041] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0043] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] like Figures 1-4 As shown, this embodiment provides a furnace internal monitoring device, including a probe 1, a distance sensor 2, and a control box 3.

[0046] The head of probe 1 can extend into or retract from the furnace. Essentially, probe 1 has a head and a tail at opposite ends along its axial direction, and the extension or retraction of the head into or out of the furnace constitutes movement along its axial direction. A distance sensor 2 is located at the head of probe 1. The distance sensor 2 emits a detection signal upwards to measure whether the distance between the coke block and probe 1 in the furnace meets a preset distance. Both probe 1 and distance sensor 2 are electrically connected to control box 3. Control box 3 is configured to retract the head of probe 1 from the furnace when the distance between the head of probe 1 and the coke block in the furnace does not meet the preset distance, and to re-enter the head of probe 1 into the furnace after a preset retraction time.

[0047] In practice, the head of probe 1 extends into the furnace to the monitoring position while the furnace is in operation. If a piece of coke falls from the furnace, and the distance between the coke and probe 1 is less than the preset distance, the coke can be detected by the detection signal emitted by the distance sensor 2. The distance sensor 2 then sends a signal to the control box 3, causing the control box 3 to control the head of probe 1 to exit the furnace to prevent the coke from hitting probe 1. For example, the preset distance is considered to be met when the distance between the coke and probe 1 is greater than 0.5 meters. Therefore, when the coke falls to a distance equal to or less than 0.5 meters from probe 1, the preset distance is not met, and the distance sensor 2 sends a signal to the control box 3 to make the head of probe 1 exit the furnace. Furthermore, it can be selected that probe 1 exits the furnace and re-enters the furnace after a preset time (e.g., 15 seconds) for re-monitoring.

[0048] The furnace internal monitoring device provided in this embodiment can monitor the distance between the coke block and the probe rod 1 in real time by setting a distance sensor 2 at the head of the probe rod 1. When the distance does not meet the preset distance, the control box 3 can control the probe rod 1 to exit the furnace in time, effectively avoiding the coke block from damaging the probe rod 1, which is conducive to reducing the damage rate of the probe rod 1 and also helps to reduce the impact on the boiler operation rhythm caused by the damage of the probe rod 1.

[0049] Optionally, the ranging sensor 2 may include, but is not limited to, an ultrasonic ranging radar.

[0050] like Figure 1 As shown, in some embodiments, a clearance hole 11 is provided on the side peripheral wall of the probe rod 1, and the distance measuring sensor 2 is disposed inside the clearance hole 11. The working surface of the distance measuring sensor 2 is flush with the outer surface of the side peripheral wall of the probe rod 1. This arrangement avoids the problem of the distance measuring sensor 2 protruding from the surface of the probe rod 1 and easily colliding with debris in the furnace, and also avoids the problem of deviation between the measured value and the actual distance caused by the distance measuring sensor 2 protruding from the surface of the probe rod 1, thereby making the distance detection by the distance measuring sensor 2 more accurate.

[0051] like Figure 1As shown, in some embodiments, a mounting bracket 12 is provided inside the probe 1, and the mounting bracket 12 is configured to extend to the clearance hole 11, to which the ranging sensor 2 is connected. The mounting bracket 12 provides a stable mounting carrier for the ranging sensor 2.

[0052] Optionally, there is a gap between the outer periphery of the ranging sensor 2 and the wall of the clearance hole 11, which facilitates the flow of the cooling medium described below.

[0053] like Figure 1 As shown, in some embodiments, the furnace internal monitoring device further includes a temperature sensing element 4 and a cooling assembly 5. The probe 1 has a receiving cavity 10 inside. The temperature sensing element 4 is disposed within the receiving cavity 10 at the head of the probe 1. The temperature sensing element 4 is electrically connected to the control box 3 and is used to detect the temperature of the probe head. The cooling assembly 5 includes a delivery pipe 51 and a cooling valve 52. The delivery pipe 51 is connected to the receiving cavity 10 and is used to deliver a cooling medium into the receiving cavity 10. The cooling valve 52 is disposed on the delivery pipe 51 and electrically connected to the control box 3. The cooling valve 52 is configured to increase the valve opening when the temperature of the probe head is higher than a preset temperature.

[0054] Temperature sensing element 4 is used to detect the temperature of the probe head 1 in real time. If the temperature of the probe head 1 is higher than the preset temperature (e.g., 800℃), temperature sensing element 4 sends a signal to control box 3. Control box 3 opens cooling valve 52 to increase the flow rate of cooling medium entering the receiving cavity 10, thereby rapidly cooling the probe head 1 and preventing the probe 1 from being burned due to excessive temperature.

[0055] Optionally, the cooling medium may include, but is not limited to, compressed air.

[0056] Optionally, the temperature sensing element 4 may include, but is not limited to, a temperature sensor.

[0057] Furthermore, in some embodiments, a delay control component is also provided in the control box 3. The delay control component is electrically connected to the temperature measuring element 4 and the cooling valve 52. If the temperature of the probe head is still higher than the preset temperature after the cooling valve 52 increases the valve opening and continues for a preset time, the delay control component is configured to control the probe head to exit the furnace.

[0058] For example, if the preset temperature is 800℃ and the preset time is 2 minutes, when the temperature measuring element 4 detects that the temperature of the probe 1 head is higher than 800℃, the cooling valve 52 is opened wide. After a delay of 2 minutes, if the temperature of the probe 1 head still has not dropped below 800℃, the probe 1 is controlled to exit the furnace.

[0059] With this setup, probe 1 can be promptly removed from the furnace when cooling measures are ineffective or the temperature remains too high, further enhancing the safety protection performance of probe 1.

[0060] The delay function of the delay control component can be implemented by building logic using a delay relay or PLC. This is a mature existing technology in this field and will not be described in detail here.

[0061] like Figure 2 As shown, in some embodiments, the control box 3 is provided with a digital display control table 31, which includes a temperature display unit 311 and an alarm indicator 312. The temperature display unit 311 is used to display the temperature value of the probe head 1, and the alarm indicator 312 is configured to light up when the temperature of the probe head 1 is higher than a preset temperature.

[0062] With this setup, the temperature display unit 311 allows staff to intuitively grasp the real-time temperature of the probe 1 head, facilitating real-time monitoring of the equipment status; the alarm indicator 312 illuminates when the temperature exceeds the preset value, quickly alerting staff to abnormal situations.

[0063] like Figure 2 As shown, in some embodiments, the digital display control panel 31 further includes a first indicator light 313 and a second indicator light 314. The first indicator light 313 is configured to illuminate when the head of the probe 1 extends into the furnace and moves to the detection position, and the second indicator light 314 is configured to illuminate after the head of the probe 1 retracts from the furnace. That is, the first indicator light 313 illuminates when the probe 1 is "in position," and the second indicator light 314 illuminates when the probe 1 is "out position." This facilitates quick judgment of the real-time position status of the probe 1 by operators, avoiding misoperation.

[0064] In addition, a knob can be installed on the digital display control panel 31, allowing operators to manually control the probe 1 to move in and out. This provides a direct manual operation method for operators in case of automatic control mode failure or special working conditions, preventing damage to the probe 1 or monitoring interruption due to automatic system malfunction.

[0065] like Figure 1 and Figure 3 As shown, in some embodiments, the furnace interior monitoring device further includes a first camera 6 and a second camera 7. Both the first camera 6 and the second camera 7 are electrically connected to the control box 3, and the control box 3 is electrically connected to the host computer 9. The first camera 6 is connected to a first lens 61, and the second camera 7 is connected to a second lens 71. Both the first lens 61 and the second lens 71 are located at the head of the probe 1, and the observation directions of the first lens 61 and the second lens 71 correspond to the two opposite furnace walls of the furnace, respectively.

[0066] Because existing furnace flame monitoring typically uses a single lens with a large blind spot, in order to better monitor the overall situation, the probe 1 usually needs to be inserted deeper into the furnace. However, the deeper it is inserted, the higher the temperature becomes, and the greater the risk of the probe 1 burning out. Therefore, this embodiment adopts a dual-lens configuration combining the first lens 61 and the second lens 71, which can form a monitoring image with a wider field of view and can specifically monitor the flames at the two opposite furnace walls.

[0067] Specifically, such as Figure 3 As shown in the diagram, the box represents the furnace chamber, and the left and right sides of the box represent the two opposite furnace walls. The two arrows in the diagram indicate the observation directions of the first lens 61 and the second lens 71, respectively; that is, the two observation directions correspond to the two opposite furnace walls. Further, as... Figure 1 As shown, the first lens 61 is connected to the first camera 6 to form one video signal, and the second lens 71 is connected to the second camera 7 to form another video signal. Both video signals are transmitted into the control box 3, and then through the control box 3 to the host computer 9. The host computer 9 uses software settings to achieve either fusion or split-screen monitoring of the two lenses. Specifically, when monitoring in split-screen mode, the first lens 61 and the second lens 71 can observe the burners 100 on two opposite furnace walls respectively; when monitoring in fusion mode, the two video signals from the first lens 61 and the second lens 71 are merged into one for use as a wide-angle lens.

[0068] like Figure 4 As shown, in some embodiments, the probe 1 is connected to the drive device 8. The drive device 8 includes a drive motor 81, a conveyor chain 82, and a guide rail 83. The conveyor chain 82 and the guide rail 83 are respectively disposed on the upper and lower sides of the probe 1 and both extend along the axial direction of the probe 1. The probe 1 is connected to the conveyor chain 82 and the guide rail 83. The drive motor 81 is used to drive the conveyor chain 82 to move, thereby driving the probe 1 to reciprocate along its own axial direction. It can be understood that the drive device 8 is electrically connected to the control box 3. The control box 3 sends a command to the drive device 8 to move the probe 1, and the drive device 8 starts to drive the probe 1 to move.

[0069] With this configuration, the drive motor 81 and the conveyor chain 82 together provide a stable driving force for the movement of the probe rod 1, while the guide rail 83 provides effective support for the probe rod 1, reducing the offset or swaying of the probe rod 1 during movement and ensuring smooth movement.

[0070] Optionally, probe 1 is connected to conveyor chain 82 via an upper support arm and to guide rail 83 via a lower support arm. The lower support arm is equipped with a bearing, which is located in a groove in guide rail 83. The bearing design helps to reduce the moving resistance between the lower support arm and guide rail 83, making the movement of probe 1 smoother and more stable.

[0071] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. 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. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Furnace interior monitoring device, characterized in that include: The probe (1) has a head that can extend into or out of the furnace. A distance sensor (2) is installed at the head of the probe (1). The distance sensor (2) can emit a detection signal upward to measure whether the distance between the coke block in the furnace and the probe (1) meets the preset distance. The control box (3) is electrically connected to the probe (1) and the distance sensor (2). The control box (3) is configured to control the probe (1) to exit the furnace when the distance between the probe (1) and the coke block in the furnace does not meet the preset distance, and to control the probe (1) to re-enter the furnace after the exit action lasts for a preset time.

2. The furnace interior monitoring device according to claim 1, characterized in that, The probe (1) has a clearance hole (11) on its side wall, and the distance sensor (2) is located inside the clearance hole (11). The working surface of the distance sensor (2) is flush with the outer surface of the side wall of the probe (1).

3. The furnace interior monitoring device according to claim 2, characterized in that, The probe (1) is provided with a mounting bracket (12) inside, the mounting bracket (12) is configured to extend to the clearance hole (11), and the distance sensor (2) is connected to the mounting bracket (12).

4. The furnace interior monitoring device according to claim 1, characterized in that, The furnace internal monitoring device also includes a temperature measuring element (4) and a cooling assembly (5); the probe (1) has a receiving cavity (10) inside, the temperature measuring element (4) is set in the receiving cavity (10) at the head of the probe (1), the temperature measuring element (4) is electrically connected to the control box (3) and is used to detect the temperature of the head of the probe (1); the cooling assembly (5) includes a conveying pipe (51) and a cooling valve (52), the conveying pipe (51) is connected to the receiving cavity (10) and is used to convey cooling medium into the receiving cavity (10), the cooling valve (52) is set in the conveying pipe (51) and is electrically connected to the control box (3), the cooling valve (52) is configured to increase the valve opening when the temperature of the head of the probe (1) is higher than the preset temperature.

5. The furnace interior monitoring device according to claim 4, characterized in that, The control box (3) is also equipped with a delay control component. The delay control component is electrically connected to the temperature measuring element (4) and the cooling valve (52). If the temperature of the probe (1) head is still higher than the preset temperature after the cooling valve (52) increases the valve opening and continues for a preset time, the delay control component is configured to control the probe (1) head to exit the furnace.

6. The furnace interior monitoring device according to claim 4, characterized in that, The control box (3) is equipped with a digital display control table (31), which includes a temperature display unit (311) and an alarm indicator light (312). The temperature display unit (311) is used to display the temperature value of the probe head (1), and the alarm indicator light (312) is configured to light up when the temperature of the probe head (1) is higher than the preset temperature.

7. The furnace interior monitoring device according to claim 6, characterized in that, The digital display control table (31) also includes a first indicator light (313) and a second indicator light (314). The first indicator light (313) is configured to illuminate when the head of the probe (1) extends into the furnace and moves to the detection position, and the second indicator light (314) is configured to illuminate after the head of the probe (1) exits the furnace.

8. The furnace interior monitoring device according to claim 4, characterized in that, The cooling medium is compressed air.

9. The furnace interior monitoring device according to claim 1, characterized in that, The furnace internal monitoring device also includes a first camera (6) and a second camera (7). The first camera (6) and the second camera (7) are both electrically connected to the control box (3). The control box (3) is electrically connected to the host computer (9). The first camera (6) is connected to a first lens (61), and the second camera (7) is connected to a second lens (71). The first lens (61) and the second lens (71) are both located at the head of the probe (1), and the observation directions of the first lens (61) and the second lens (71) correspond to the two opposite furnace walls of the furnace, respectively.

10. The furnace interior monitoring device according to any one of claims 1 to 9, characterized in that, The probe (1) is connected to the drive device (8). The drive device (8) includes a drive motor (81), a conveyor chain (82), and a guide rail (83). The conveyor chain (82) and the guide rail (83) are respectively arranged on the upper and lower sides of the probe (1) and both extend along the axial direction of the probe (1). The probe (1) is connected to the conveyor chain (82) and the guide rail (83). The drive motor (81) is used to drive the conveyor chain (82) to move, thereby driving the probe (1) to reciprocate along its own axial direction.

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