Boiler induced draft fan convenient to disassemble
By using an ultrasonic rangefinder and piston rod system in the boiler induced air fan, the displacement changes of the seal plate and the real-time record of the air pressure data is solved, which solves the problem that operators in the prior art have difficulty in intuitively judging the air quality, and efficient monitoring and data recording of the air quality are achieved.
Patent Information
- Application Number
- CN202421987894.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-08-16
AI Technical Summary
When existing boiler induced air induced air, it is difficult for operators to intuitively judge the induced air quality, which affects combustion efficiency and exhaust gas emissions.
A boiler induced air fan is designed that is easy to disassemble, using an ultrasonic rangefinder and piston rod system. By monitoring the displacement changes of the seal plate, the air pressure data is recorded in real time. The operator can view the data through the detector and intuitively judge the air induced air quality.
It realizes intuitive monitoring of air induced air quality and real-time data recording, helping operators to timely detect and adjust air induced air instability problems, and improves combustion efficiency and exhaust emission smoothness.
Smart Images
Figure CN222936951U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of induced draft fans, in particular to a boiler induced draft fan which is convenient to disassemble. Background Technique
[0002] A boiler induced draft fan is a fan specially designed for a boiler system. Its main function is to extract the exhaust gas generated after combustion from the boiler combustion chamber to maintain a negative pressure environment inside the boiler. This negative pressure state is very important for ensuring the supply of combustion air and controlling the combustion process. At the same time, it also helps to control the exhaust gas emissions generated by combustion.
[0003] In a boiler system, the stability of the induced draft fan is crucial because it directly affects the efficiency and safety of the combustion process. The induced draft fan is responsible for extracting the exhaust gas after combustion from inside the boiler, maintaining an appropriate negative pressure environment, ensuring the supply of combustion air and the smooth discharge of exhaust gas.
[0004] For the detection of the induced draft stability of the boiler induced draft fans on the market, the gas flow rate passing through the induced draft fan is usually measured by a flow meter. The fluctuation of the flow rate may indicate the instability of the induced draft volume, which may affect the combustion efficiency and exhaust gas emissions. However, such an operation cannot enable the operator to more intuitively judge the induced draft quality. Therefore, we propose a boiler induced draft fan which is convenient to disassemble to solve the above problems, and can enable the operator to more intuitively view the induced draft quality. Content of the Utility Model
[0005] The purpose of the utility model is to solve the problems existing in the prior art, and to propose a boiler induced draft fan which is convenient to disassemble.
[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:
[0007] A boiler induced draft fan which is convenient to disassemble, comprising: a fan, a motor is fixedly installed in the middle of the fan, the driving output end of the motor is in transmission connection with a transmission shaft, and a spiral fan blade is fixedly installed at the other end of the transmission shaft. The output end of the fan is communicated and installed with an air outlet pipe, and an induced draft quality monitoring mechanism is installed in the air outlet pipe;
[0008] The induced draft quality monitoring mechanism includes connecting frames fixedly installed on both sides of the inner wall of the air outlet pipe, a piston cylinder fixedly installed between the two groups of connecting frames, a piston rod movably installed in the piston cylinder, a spring sleeved on one side of the piston rod, a sealing cover fixedly installed at the other end of the piston rod, a mounting frame fixedly installed on the outer wall of the air outlet pipe, a detection plate fixedly installed at the other end of the mounting frame, and an ultrasonic distance measuring instrument fixedly installed in the middle of the detection plate.
[0009] Preferably, the ultrasonic rangefinder corresponds to the cover, the cover fits with the air outlet pipe, and both sides of the spring are fixedly installed on the outer walls of the piston cylinder and the piston rod respectively, which can support the piston rod.
[0010] Preferably, a fixing frame is fixedly installed at the end of the pipeline at the input end of the fan, and positioning bolts are threadedly installed on both sides of the fixing frame, which can install and position the fan.
[0011] Preferably, a head is fixedly installed at one end of the piston rod, and the cross-sectional area of the head is larger than that of the piston cylinder, which can limit the piston rod.
[0012] Preferably, limiting rings are fixedly installed on both sides of the inner wall of the air outlet pipe, limiting rods are movably installed in the two limiting rings, and one ends of the two limiting rods are fixedly installed on one side of the cover, which can limit the cover.
[0013] Preferably, a connector is detachably inserted on one side of the ultrasonic rangefinder, a wire is fixedly installed at the other end of the connector, and a detector is connected and installed at the other end of the wire, which can be connected and installed with the ultrasonic rangefinder.
[0014] Compared with the prior art, the beneficial effects of the present utility model are:
[0015] In the present utility model, after connecting the power supply to be monitored and turning on the motor on the fan, the spiral fan blades in the fan are driven to rotate, so that the waste gas in the boiler can be extracted, and the air outlet pipe at one end of the fan blows out gas. When the air flow blows the sealing plate installed on one side of the piston rod, the sealing plate will be subjected to the extrusion force of the air flow and continuously move outward. And in cooperation with the ultrasonic rangefinder installed on the detection plate, the distance that the sealing plate moves outward can be recorded. By the distance and amplitude of the extrusion of the sealing plate, the output wind pressure can be monitored at all times;
[0016] Since a connector is detachably inserted on one side of the ultrasonic rangefinder, and the connector is connected and installed with a detector through a wire. When the detector is connected to the ultrasonic rangefinder through the wire, the operator can clearly observe the displacement change of the sealing plate through the display screen on the detector and store it inside the detector, so that the operator can judge the air extraction quality from the data comparison and the intuitive displacement of the sealing plate. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic structural diagram of a boiler induced draft fan that is convenient to disassemble proposed by the present utility model;
[0018] Figure 2 is a schematic structural diagram of an air extraction quality monitoring mechanism of a boiler induced draft fan that is convenient to disassemble proposed by the present utility model;
[0019] Figure 3Schematic diagram of the cover structure of a boiler induced draft fan that is convenient for disassembly proposed by the present utility model.
[0020] In the figure: 1, fan; 11, fixing frame; 12, positioning bolt; 2, air outlet pipe; 21, connecting frame; 22, piston cylinder; 23, piston rod; 24, spring; 25, cover; 26, mounting frame; 27, detection plate; 28, ultrasonic rangefinder; 3, head; 31, limiting ring; 32, limiting rod; 33, wire; 34, detector. Specific implementation manner
[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.
[0022] Refer to Figures 1-3 , a boiler induced draft fan that is convenient for disassembly, including: a fan 1, a motor is fixedly installed in the middle of the fan 1, the driving output end of the motor is in transmission connection with the transmission shaft, and a spiral fan blade is fixedly installed at the other end of the transmission shaft. The output end of the fan 1 is connected and installed with an air outlet pipe 2, and an induced air quality monitoring mechanism is installed in the air outlet pipe 2;
[0023] The induced air quality monitoring mechanism includes connecting frames 21 fixedly installed on both sides of the inner wall of the air outlet pipe 2, a piston cylinder 22 fixedly installed between the two groups of connecting frames 21, a piston rod 23 movably installed in the piston cylinder 22, a spring 24 sleeved on one side of the piston rod 23, a cover 25 fixedly installed at the other end of the piston rod 23, a mounting frame 26 fixedly installed on the outer wall of the air outlet pipe 2, a detection plate 27 fixedly installed at the other end of the mounting frame 26, and an ultrasonic rangefinder 28 fixedly installed in the middle of the detection plate 27. A head 3 is fixedly installed at one end of the piston rod 23, and the cross-sectional area of the head 3 is larger than the cross-sectional area of the piston cylinder 22, which can limit the piston rod 23. A head 3 is fixedly installed at one end of the piston rod 23, and the cross-sectional area of the head 3 is larger than the cross-sectional area of the piston cylinder 22, which can limit the piston rod 23. After turning on the power supply to be monitored, the motor on the fan 1 is turned on, driving the spiral fan blade in the fan 1 to rotate, so that the waste gas in the boiler can be extracted, and the waste gas is blown out from the air outlet pipe 2 at one end of the fan 1. When the air flow blows the sealing plate installed on one side of the piston rod 23, the sealing plate will be subjected to the extrusion force of the air flow and continuously move outward. In cooperation with the ultrasonic rangefinder 28 installed on the detection plate 27, the distance that the sealing plate moves outward can be recorded. By the distance and amplitude of the sealing plate being squeezed, the air pressure output can be monitored at all times. Among them, the ultrasonic rangefinder 28 is set at a position where the waste gas cannot reach after being discharged.
[0024] Furthermore, a connector is detachably plugged on one side of the ultrasonic rangefinder 28. The other end of the connector is fixedly installed with a wire 33, and the other end of the wire 33 is connected and installed with a detector 34, which can be connected and installed with the ultrasonic rangefinder 28. After the detector 34 is connected to the ultrasonic rangefinder 28 through the wire 33, the operator can clearly observe the displacement change of the sealing plate through the display screen on the detector 34 and store it inside the detector 34. The air extraction quality can be judged from the data comparison and the intuitive displacement of the sealing plate.
[0025] Furthermore, limiting rings 31 are fixedly installed on both inner sides of the inner wall of the air outlet pipe 2. Limiting rods 32 are movably installed in the two groups of limiting rings 31. One ends of the two groups of limiting rods 32 are fixedly installed on one side of the sealing cover 25, which can limit the sealing cover 25. When the sealing cover 25 is reset, with the cooperation of the limiting rods 32 in the limiting rings 31, it can ensure that the sealing cover 25 moves horizontally, so that the sealing cover 25 fits at the port of the air outlet pipe 2.
[0026] Furthermore, the ultrasonic rangefinder 28 corresponds to the sealing cover 25, and the sealing cover 25 fits with the air outlet pipe 2. Both sides of the spring 24 are fixedly installed on the outer walls of the piston cylinder 22 and the piston rod 23 respectively, which can support the piston rod 23. When the air flow squeezes the sealing cover 25, with the cooperation of the spring 24 installed on the outer wall of the piston rod 23, it can not only support the sealing cover 25, but also make the sealing cover 25 automatically reset.
[0027] During use, first, through the fixing frame 11 welded on one side of the pipeline at the input end of the fan 1 and with the cooperation of the positioning bolt 12 threadedly installed on the fixing frame 11, the fan 1 can be installed at the position where the boiler needs to extract waste gas, which is convenient for the disassembly and installation of the induced draft fan of this boiler. Then, connect the power supply to be monitored. At the same time, turn on the motor on the fan 1 to drive the spiral fan blades inside the fan 1 to rotate, so that the air outlet pipe 2 at one end of the fan 1 can blow out air flow. When the air flow blows the sealing plate installed on one side of the piston rod 23, the sealing plate will be subjected to the extrusion force of the air flow and continuously move outward. And with the cooperation of the ultrasonic rangefinder 28 installed on the detection plate 27, the distance that the sealing plate moves outward can be recorded. The quality of the induced draft output can be efficiently monitored through the distance that the sealing plate is squeezed and the moving amplitude. At the same time, a connector is detachably plugged on one side of the ultrasonic rangefinder 28, and the connector is connected and installed with a detector 34 through a wire 33. After the detector 34 is connected to the ultrasonic rangefinder 28 through the wire 33, the operator can clearly observe the displacement change of the sealing plate through the display screen on the detector 34 and store it inside the detector 34, so that the operator can judge the quality of the induced draft output through data comparison. On-site, the quality of the induced draft can also be intuitively observed through the sealing plate. Among them, when the sealing cover 25 continuously moves outward and tends to be stable, it means that the wind energy quality is good. On the contrary, when the sealing cover 25 continuously moves outward and then slowly retracts and moves left and right, it means that the induced draft quality is average and poor.
[0028] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.
Claims
1. A boiler induced draft fan that is easy to disassemble, characterized in that: include: A fan (1), wherein a motor is fixedly mounted in the middle of the fan (1), the motor drive output end is connected to a transmission shaft, and a spiral fan blade is fixedly mounted on the other end of the transmission shaft, the output end of the fan (1) is connected to an air outlet pipe (2), and an air quality monitoring mechanism is mounted in the air outlet pipe (2); The induced air quality monitoring mechanism comprises a connecting frame (21) fixedly mounted on both sides of the inner wall of the air outlet pipe (2), a piston cylinder (22) fixedly mounted between two sets of the connecting frames (21), a piston rod (23) movably mounted in the piston cylinder (22), a spring (24) sleeved on one side of the piston rod (23), a sealing cover (25) fixedly mounted on the other end of the piston rod (23), a mounting frame (26) fixedly mounted on the outer wall of the air outlet pipe (2), a detection plate (27) fixedly mounted on the other end of the mounting frame (26), and an ultrasonic rangefinder (28) fixedly mounted in the middle of the detection plate (27).
2. The easily disassembled boiler induced draft fan according to claim 1, characterized in that: The ultrasonic rangefinder (28) corresponds to the sealing cover (25), the sealing cover (25) and the air outlet pipe (2) fit together, and the two sides of the spring (24) are respectively fixedly mounted to the outer wall of the piston cylinder (22) and the piston rod (23).
3. The easily disassembled boiler induced draft fan according to claim 1, characterized in that: A fixing frame (11) is fixedly mounted on the end of the pipeline at the input end of the fan (1), and positioning bolts (12) are threadedly mounted on both sides of the fixing frame (11).
4. The easily disassembled boiler induced draft fan according to claim 1, characterized in that: A sealing head (3) is fixedly mounted on one end of the piston rod (23); the cross-sectional area of the sealing head (3) is larger than the cross-sectional area of the piston cylinder (22).
5. The easily disassembled boiler induced draft fan according to claim 1, characterized in that: Limiting rings (31) are fixedly mounted on both sides of the inner wall of the air outlet pipe (2), limiting rods (32) are movably mounted in the two sets of limiting rings (31), and one end of the two sets of limiting rods (32) is fixedly mounted on one side of the sealing cover (25).
6. The easily disassembled boiler induced draft fan according to claim 1, characterized in that: A connector is detachably plugged into one side of the ultrasonic rangefinder (28), a wire (33) is fixedly mounted on the other end of the connector, and a detector (34) is connected and mounted on the other end of the wire (33).