Mechanical smoke exhaust linkage system of gas-fired boiler
By using an opening feedback valve and laser rangefinder in the gas boiler mechanical smoke exhaust linkage system, the working frequency of the smoke exhaust fan is adjusted, and the problem of poor smoke exhaust in the gas boiler transformation is solved, an efficient and reliable smoke exhaust system is achieved, and energy consumption is reduced.
Patent Information
- Application Number
- CN202420602166.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-27
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-03-27
AI Technical Summary
In the gas boiler renovation project, there is a problem of poor smoke exhaust. The existing solutions may have too high accuracy requirements for monitoring components or have low reliability, so it cannot ensure the sealing of the smoke exhaust pipes well.
Design a mechanical smoke exhaust linkage system for gas boilers, including a control system, a gas boiler, a flue gas heat extraction tower and a chimney. By setting up an opening feedback valve and a laser rangefinder in the air duct, the opening of the opening feedback valve is monitored by a laser rangefinder, and the operating frequency of the smoke exhaust fan is adjusted through the control system to ensure that the pressure at the boiler outlet is always in a micro-negative pressure state.
It realizes a smoke exhaust system that is sensitive to feedback, has high reliability and is well-sealed, effectively solves the problem of poor smoke exhaust caused by gas boiler transformation, and realizes the energy-saving and consumption-reducing effect of the smoke exhaust system.
Smart Images
Figure CN222688222U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical smoke exhaust of gas boilers, in particular to a mechanical smoke exhaust linkage system of gas boilers. Background Art
[0002] At present, in order to actively respond to the national carbon peak requirements, some projects will add heat exchangers to the flue gas pipeline to recycle the waste heat of boiler flue gas, which can reduce the carbon and nitrogen sulfide emissions of the entire system by about 5% to 10%. In gas boiler renovation projects, adding boilers or heat exchangers often increases the resistance loss along the flue, resulting in poor exhaust, and the need to add a mechanical exhaust system.
[0003] There are two commonly used solutions: 1. Install a pressure sensor and fan interlock at the inlet of the flue fan to ensure that the fan inlet is in a slightly negative pressure state; the problem with this solution is that the pressure sensor has very high accuracy requirements, requiring an accuracy of -0-50pa, and the flue gas of the gas boiler contains a certain acidity, and long-term contact cannot guarantee the reliability of use; 2. Open a hole in the exhaust duct of the gas boiler and install a check valve; the problem with this solution is that the traditional check valve has poor sealing performance, which will result in smoke leakage, and the exhaust fans are mostly operated at a fixed frequency, with high power consumption.
[0004] Therefore, the utility model proposes a novel gas boiler mechanical smoke exhaust linkage system to solve the above problems. Utility Model Content
[0005] In order to overcome the above-mentioned shortcomings of the prior art and solve the problem of poor smoke exhaust in gas boiler renovation projects, the existing solutions either have too high precision requirements for monitoring components or have low reliability, and cannot well ensure the sealing of the smoke exhaust pipe. The utility model provides a gas boiler mechanical smoke exhaust linkage system, and the specific technical solution is as follows:
[0006] A gas boiler mechanical smoke exhaust linkage system comprises a control system, a gas boiler, a smoke exhaust tower and a chimney; the gas boiler, the smoke exhaust tower and the chimney are all connected via a smoke exhaust pipe; a smoke exhaust fan is arranged on the side of the smoke exhaust tower close to the gas boiler; an air duct is arranged on the smoke exhaust pipe between the gas boiler and the smoke exhaust fan; an opening feedback valve and a laser rangefinder are arranged in the air duct.
[0007] Preferably, the opening feedback valve is a one-way valve, comprising a fixed part and a valve flap part; the outer edge of the fixed part is welded and fixed to the inner wall of the air duct; one side of the valve flap part is hinged to the fixed part through a hinge, and the other side is a free end and the side facing the smoke exhaust duct is the open side; a weight is also provided on one side of the open side of the valve flap part.
[0008] Preferably, a sealing ring is provided on the contact surface between the valve flap portion and the inner wall of the air duct, and the inner lining of the sealing ring is sealed with a rubber pad.
[0009] Preferably, a rubber seal is provided at the hinge connection.
[0010] Preferably, one end of the air duct is connected to the smoke exhaust duct, and the other end is connected to the indoor air inlet.
[0011] Also preferably, the opening feedback valve is arranged at a side of the air duct close to the smoke exhaust pipe; and the laser rangefinder is arranged at a side of the air duct close to the indoor air inlet.
[0012] Also preferably, the control system is arranged in the boiler room control room; the smoke exhaust fan and the laser rangefinder are both electrically connected to the control system.
[0013] Also preferably, the laser rangefinder is arranged at a position 600 mm away from the valve flap portion in a closed state.
[0014] Further preferably, the smoke exhaust fan adopts an explosion-proof variable frequency fan.
[0015] More preferably, the smoke exhaust fan, the opening feedback valve and the sealing ring are all made of stainless steel.
[0016] The beneficial effects of the utility model are:
[0017] The utility model adds an opening feedback valve and a laser rangefinder, and accurately monitors the opening of the opening feedback valve through the laser rangefinder electrically connected to the control system, and determines whether the opening is lower than the set value, so as to adjust the working frequency of the smoke exhaust fan. The utility model has sensitive feedback, high reliability and good airtightness; it effectively solves the problem of poor smoke exhaust caused by gas boiler transformation, and can also achieve the effect of energy saving and consumption reduction of the smoke exhaust system. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The drawings constituting the specification of this application are used to provide further understanding of this application and do not constitute improper limitations on this application.
[0019] Figure 1 This is the working flow diagram of the smoke exhaust system in the utility model;
[0020] Figure 2 It is a schematic diagram of the overall structure of the utility model;
[0021] Figure 3 This is a schematic diagram of the position of the laser rangefinder in the utility model;
[0022] In the figure, 1-gas boiler; 2-smoke exhaust fan; 3-smoke heat extraction tower; 4-chimney; 5-smoke exhaust pipe; 6-air duct; 61-indoor air inlet; 7-opening feedback valve; 71-fixed part; 72-valve disc part; 73-loose-leaf; 74-weight; 8-laser rangefinder. DETAILED DESCRIPTION
[0023] The specific implementation of a gas boiler mechanical smoke exhaust linkage system provided by the utility model is further described in conjunction with the accompanying drawings and embodiments.
[0024] like Figure 1 As shown, a gas boiler mechanical smoke exhaust linkage system includes a control system, a gas boiler 1, a flue gas heat extraction tower 3 and a chimney 4; the gas boiler 1, the flue gas heat extraction tower 3 and the chimney 4 are all connected through a smoke exhaust pipe 5; a smoke exhaust fan 2 is arranged on the side of the smoke exhaust tower 3 close to the gas boiler 1; an air duct 6 is arranged on the smoke exhaust pipe 5 between the gas boiler 1 and the smoke exhaust fan 2; and an opening feedback valve 7 and a laser rangefinder 8 are arranged in the air duct 6.
[0025] It is worth noting that one end of the air duct 6 is connected to the smoke exhaust pipe 5, and the other end is connected to the indoor air inlet 61; the opening feedback valve 7 is arranged on one side of the air duct 6 close to the smoke exhaust pipe 5; the laser rangefinder 8 is arranged on one side of the air duct 6 close to the indoor air inlet 61.
[0026] like Figure 2 As shown, the opening feedback valve 7 is a one-way valve body whose main body is made of stainless steel material, including a fixed part 71 and a valve flap part 72; wherein, the outer edge of the fixed part 71 is welded and fixed to the inner wall of the air duct 6; one side of the valve flap part 72 is hinged to the fixed part 71 by a hinge 73, and the other side is a free end and the side facing the smoke exhaust pipe 5 is the open side; a weight 74 is also provided on one side of the open side of the valve flap part 72, wherein the function of the weight 74 is to increase the dead weight of the valve flap part 72 to avoid excessive opening of the valve flap part 72 and cause smoke leakage in the system.
[0027] Preferably, in order to ensure the overall sealing of the system, a sealing ring made of stainless steel is provided on the contact surface between the valve flap portion 72 and the inner wall of the air duct 6 , and the inner lining of the sealing ring is sealed with a rubber pad; a rubber seal is also provided at the connection of the hinge 73 .
[0028] It is also preferred that the control system is arranged in the boiler room control room; the smoke exhaust fan 2 and the laser rangefinder 8 are both electronically connected to the control system, that is, the opening data of the opening feedback valve 7 is monitored by the laser rangefinder 8, and the operating frequency of the smoke exhaust fan 2 is adjusted in real time to achieve the purpose of energy saving and consumption reduction.
[0029] like Figure 3As shown, the horizontal distance A between the laser rangefinder 8 and the valve flap portion 72 in the fully closed state is set to 600 mm, and the horizontal distance B between the laser rangefinder 8 and the valve flap portion 72 in the open state is set to 800 mm;
[0030] When the laser rangefinder 8 detects that the horizontal distance between the laser rangefinder 8 and the valve flap 72 of the opening feedback valve 7 is 650-700 mm, the smoke exhaust pipe 5 is not exhausting smoothly, and the laser rangefinder 8 transmits a signal to the control system, and the control system controls the smoke exhaust fan 2 to increase the frequency to improve the smoke exhaust capacity of the smoke exhaust pipe 5;
[0031] When the laser rangefinder 8 detects that the horizontal distance between it and the valve disc 72 of the opening feedback valve 7 is greater than 800 mm, the opening of the opening feedback valve 7 is too large and the power consumption of the smoke exhaust fan 2 increases. At this time, the laser rangefinder 8 transmits a signal to the control system, and the control system controls the smoke exhaust fan 2 to reduce its frequency.
[0032] It is worth mentioning that generally, when the distance A is 600mm and the distance B is 800mm, the smoke exhaust effect of the linkage system is best.
[0033] The utility model adds an opening feedback valve and a laser rangefinder, and accurately monitors the opening size of the opening feedback valve through the laser rangefinder electrically connected to the control system, and determines whether the opening is lower than a set value, thereby adjusting the working frequency of the smoke exhaust fan, thereby ensuring that the pressure at the boiler outlet is always in a state of slight negative pressure, thereby ensuring the efficient operation of the gas boiler and the smoke exhaust system.
[0034] The utility model has sensitive feedback and good airtightness; all main components are made of high-strength and corrosion-resistant stainless steel materials to avoid corrosion of various system components due to slightly acidic flue gas of the gas boiler, and has high reliability.
[0035] The utility model has a simple structure and is convenient for maintenance, and can effectively solve the problem of poor smoke exhaust caused by gas boiler transformation and can also achieve the purpose of energy saving and consumption reduction of the smoke exhaust system.
[0036] In the present utility model, the directions or positional relationships indicated by terms such as "upper", "lower", "bottom", "top", etc. are based on the directions or positional relationships shown in the accompanying drawings. They are relational words determined only for the convenience of describing the structural relationships of the various parts or components of the present utility model. They do not specifically refer to the parts or components of the present utility model and cannot be understood as limitations on the present utility model. Terms such as "connected" and "connected" should be understood in a broad sense, indicating that they can be fixedly connected, integrally connected, or detachably connected; they can be directly connected or indirectly connected through an intermediate medium. For relevant scientific research or technical personnel in this field, the specific meanings of the above terms in the present utility model can be determined according to specific circumstances, and they cannot be understood as limitations on the present utility model.
[0037] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.
Claims
1. A gas boiler mechanical smoke exhaust linkage system, characterized in that: Including control system, gas boiler, flue gas heating tower and chimney; The gas boiler, the flue gas heating tower and the chimney are all connected through a smoke exhaust pipe; a smoke exhaust fan is arranged on the side of the flue gas heating tower close to the gas boiler; An air duct is provided on the smoke exhaust pipe between the gas boiler and the smoke exhaust fan; An opening feedback valve and a laser rangefinder are arranged in the air duct.
2. The gas boiler mechanical smoke exhaust linkage system according to claim 1 is characterized in that: The opening feedback valve is a one-way valve, including a fixed part and a valve flap part; the outer edge of the fixed part is welded and fixed to the inner wall of the air duct; one side of the valve flap part is hinged to the fixed part through a hinge, and the other side is a free end and the side facing the smoke exhaust pipe is the open side; a weight is also provided on one side of the open side of the valve flap part.
3. The gas boiler mechanical smoke exhaust linkage system according to claim 2 is characterized in that: A sealing ring is provided on the contact surface between the valve flap and the inner wall of the air duct, and the inner lining of the sealing ring is sealed with a rubber pad.
4. The gas boiler mechanical smoke exhaust linkage system according to claim 2, characterized in that: The hinged joint is provided with a rubber seal.
5. The gas boiler mechanical smoke exhaust linkage system according to claim 1, characterized in that: One end of the air duct is connected to the smoke exhaust pipe, and the other end is connected to the indoor air inlet.
6. The gas boiler mechanical smoke exhaust linkage system according to claim 5, characterized in that: The opening feedback valve is arranged at one side of the air duct close to the smoke exhaust pipe; the laser rangefinder is arranged at one side of the air duct close to the indoor air inlet.
7. The gas boiler mechanical smoke exhaust linkage system according to claim 1, characterized in that: The control system is arranged in the boiler room control room; the smoke exhaust fan and the laser rangefinder are both electrically connected to the control system.
8. The gas boiler mechanical smoke exhaust linkage system according to claim 2, characterized in that: The laser rangefinder is arranged at a position 600 mm away from the valve flap portion in the closed state.
9. The gas boiler mechanical smoke exhaust linkage system according to claim 1, characterized in that: The smoke exhaust fan adopts an explosion-proof variable frequency fan.
10. The gas boiler mechanical smoke exhaust linkage system according to claim 3, characterized in that: The smoke exhaust fan, the opening feedback valve and the sealing ring are all made of stainless steel.