Boiler negative pressure adjusting control device

Abstract

The boiler negative pressure adjusting control device comprises a boiler induced draft fan and an air volume adjusting mechanism, the input end of the boiler induced draft fan is connected with an exhaust port of a boiler, the boiler induced draft fan is electrically connected with an external power source, and the air volume adjusting mechanism is installed at the output end of the boiler induced draft fan. The air volume adjusting mechanism comprises a sliding groove, an air baffle and a sealing plate, the sliding groove is formed in the side wall of the output end of the boiler induced draft fan, the air baffle is slidably installed in the sliding groove, the sealing plate is installed on the side wall of the air baffle and can be attached to the inner wall of the output end of the boiler induced draft fan, and scale marking lines are arranged on the side wall of the air baffle. According to the device, the size of the opening in the output end of the boiler induced-draft fan is adjusted by arranging the wind shield, the air volume of the boiler induced-draft fan is changed, therefore, the negative pressure in the boiler is controlled, and compared with adjustment through a shutter, the device is simpler in structure, not prone to damage and convenient to maintain at the same time.

Description

Technical Field

[0001] This patent relates to the field of boilers, specifically a boiler negative pressure regulation and control device. Background Technology

[0002] Boiler negative pressure regulation is an important part of ensuring the safe and stable operation of the boiler. Appropriate negative pressure can make the fuel and air in the furnace mix fully, ensure complete combustion, improve combustion efficiency, and reduce incomplete combustion losses.

[0003] Existing boiler negative pressure regulation and control devices are generally installed on the induced draft fan. By adjusting the opening of the baffle, the induced draft volume is changed, and the negative pressure in the boiler is regulated. In an adjustable boiler induced draft fan proposed in publication number CN212429242U, the induced draft volume is controlled by setting louvers. However, since the louvers are driven by gears, particulate matter in the flue gas can easily enter the gear grooves, which affects the meshing between adjacent gears and easily affects the opening and closing of the louvers. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this patent is to provide a boiler negative pressure regulation and control device.

[0005] The technical solution adopted by this patent to solve its technical problem is: a boiler negative pressure regulation and control device, including a boiler induced draft fan and an air volume regulation mechanism. The input end of the boiler induced draft fan is connected to the exhaust port of the boiler. The boiler induced draft fan is electrically connected to an external power supply. The output end of the boiler induced draft fan is equipped with an air volume regulation mechanism.

[0006] The air volume regulating mechanism includes a sliding groove, a baffle plate, and a sealing plate. The side wall of the output end of the boiler induced draft fan is provided with a sliding groove. The baffle plate is slidably installed in the sliding groove. The side wall of the baffle plate is equipped with a sealing plate. The sealing plate can fit against the inner wall of the output end of the boiler induced draft fan.

[0007] The side wall of the wind deflector is provided with scale markings;

[0008] A sealing ring is fitted to the inner wall of the sliding groove, and the sealing ring can fit against the side wall of the wind deflector.

[0009] Furthermore, a limit frame is installed on the inner wall of the output end of the boiler induced draft fan. There are two limit frames, which are respectively set on the upper and lower sides of the baffle plate.

[0010] Furthermore, an electrically controlled push rod is installed on the side wall of the output end of the boiler induced draft fan. The electrically controlled push rod is electrically connected to an external power source. A connecting frame is installed on the output end of the electrically controlled push rod, and the connecting frame is installed on the side wall of the wind baffle.

[0011] Furthermore, the sealing plate includes a plate body, a spring, and a sealing strip. The side wall of the baffle plate has a groove, the plate body is slidably installed in the groove, the lower wall of the plate body is installed with a spring, and the upper wall of the plate body is installed with a sealing strip. The sealing strip can fit against the inner wall of the boiler induced draft fan output end.

[0012] Furthermore, a pin is installed on the inner wall of the groove, the spring is sleeved on the outer side of the pin, and a positioning hole is opened on the side wall of the plate, so that the pin can be inserted into the positioning hole.

[0013] Furthermore, the output end of the boiler induced draft fan is equipped with a transfer pipe, which is connected to an external flue gas treatment device.

[0014] The beneficial effects of this patent are:

[0015] This device adjusts the size of the opening at the output end of the boiler induced draft fan by setting a baffle plate, thereby changing the air volume of the boiler induced draft fan and controlling the negative pressure inside the boiler. Compared with adjustment by louvers, this device has a simpler structure, is less prone to damage, and is easier to maintain.

[0016] In addition, the device is equipped with scale markings on the wind baffle plate, which allows the size of the opening at the output end of the boiler induced draft fan to be clearly observed through the scale markings, making it easy to accurately adjust its air volume. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this patent.

[0018] Figure 2 This is a schematic diagram of the airflow adjustment mechanism of this patent.

[0019] Figure 3 yes Figure 2 Schematic diagram of the structure at point A in the middle.

[0020] Explanation of reference numerals in the attached drawings: 1 Boiler induced draft fan, 2 Air volume regulating mechanism, 21 Sliding groove, 22 Baffle plate, 23 Sealing plate, 3 Scale mark, 4 Sealing ring, 5 Limit frame, 6 Electrically controlled push rod, 7 Connecting frame, 8 Groove, 9 Pin, 10 Positioning hole, 11 Transfer pipe, 231 Plate, 232 Spring, 233 Sealing strip. Detailed Implementation

[0021] The present patent is further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the patent. Furthermore, it should be understood that after reading the teachings of this patent, those skilled in the art can make various alterations or modifications to this patent, and these equivalent forms also fall within the scope defined by the appended claims.

[0022] See Figure 1 , Figure 2 , Figure 3 This is a schematic diagram of the structure of this patent. A boiler negative pressure regulation and control device includes a boiler induced draft fan 1 and an air volume regulation mechanism 2. The input end of the boiler induced draft fan 1 is connected to the exhaust port of the boiler. The boiler induced draft fan 1 is electrically connected to an external power supply. The output end of the boiler induced draft fan 1 is equipped with the air volume regulation mechanism 2.

[0023] The size of the opening at the output end of the boiler induced draft fan 1 can be adjusted by the air volume regulating mechanism 2, thereby changing the air volume of the boiler induced draft fan 1. When the opening of the baffle plate 22 is increased, the air volume increases and the negative pressure in the furnace increases; when the opening of the baffle plate 22 is decreased, the air volume decreases and the negative pressure in the furnace decreases.

[0024] The air volume regulating mechanism 2 includes a sliding groove 21, a baffle plate 22 and a sealing plate 23. The side wall of the output end of the boiler induced draft fan 1 is provided with a sliding groove 21. The baffle plate 22 is slidably installed in the sliding groove 21. The side wall of the baffle plate 22 is equipped with a sealing plate 23. The sealing plate 23 can fit against the inner wall of the output end of the boiler induced draft fan 1.

[0025] When it is necessary to adjust the air volume, the baffle plate 22 is moved in the sliding groove 21 by the electric control push rod 6, thereby changing the opening of the output end of the boiler induced draft fan 1 and adjusting the induced draft volume of the boiler induced draft fan 1.

[0026] The side wall of the wind deflector 22 is provided with scale markings 3;

[0027] Since its baffle plate 22 is located inside the boiler induced draft fan 1, the size of its opening cannot be seen directly. Therefore, in order to make it easier for the staff to clearly know its opening, this device sets a scale line 3 on its baffle plate 22. Through the scale line 3 on the baffle plate 22 exposed on the outside, the staff can clearly know the opening of the output end of the boiler induced draft fan 1.

[0028] A sealing ring 4 is fitted to the inner wall of the sliding groove 21, and the sealing ring 4 can fit against the side wall of the wind baffle 22.

[0029] By using the sealing ring 4 and the sealing plate 23, the leakage of flue gas through the sliding groove 21 can be prevented.

[0030] A limit frame 5 is installed on the inner wall of the output end of the boiler induced draft fan 1. There are two limit frames 5 in total, and the two limit frames 5 are respectively set on the upper and lower sides of the baffle plate 22.

[0031] By setting the limiting frame 5, the wind deflector 22 can be made more stable, preventing the wind deflector 22 from tilting and affecting the blocking of smoke.

[0032] An electrically controlled push rod 6 is installed on the side wall of the output end of the boiler induced draft fan 1. The electrically controlled push rod 6 is electrically connected to an external power source. A connecting frame 7 is installed on the output end of the electrically controlled push rod 6. The connecting frame 7 is installed on the side wall of the baffle plate 22.

[0033] The sealing plate 23 includes a plate body 231, a spring 232 and a sealing strip 233. The side wall of the baffle plate 22 has a groove 8. The plate body 231 is slidably installed in the groove 8. The lower wall of the plate body 231 is equipped with a spring 232, and the upper wall of the plate body 231 is equipped with a sealing strip 233. The sealing strip 233 can fit against the inner wall of the output end of the boiler induced draft fan 1.

[0034] Since the baffle plate 22 needs to slide within the sliding groove 21, the sealing strip 233 will inevitably experience some wear during the sliding process. In order to avoid the leakage of flue gas due to the wear of the sealing strip 233, this device sets the sealing strip 233 on the plate 231 and then provides a thrust to the plate 231 through the spring 232, so that the sealing strip 233 can fit tightly against the inner wall of the boiler induced draft fan 1.

[0035] A pin 9 is installed on the inner wall of the groove 8, and a spring 232 is sleeved on the outside of the pin 9. A positioning hole 10 is opened on the side wall of the plate 231, and the pin 9 can be inserted into the positioning hole 10.

[0036] By using the pin 9 and the positioning hole 10, the spring 232 can be prevented from bending, thus enabling it to stably provide thrust to the plate 231.

[0037] The output end of the boiler induced draft fan 1 is equipped with a transfer pipe 11, which is connected to an external flue gas treatment device.

[0038] When this patent is in operation, if it is necessary to adjust the air volume, the baffle plate 22 is moved in the sliding groove 21 by the electric control push rod 6, which changes the opening of the output end of the boiler induced draft fan 1, thereby adjusting the induced draft volume of the boiler induced draft fan 1. When the opening of the baffle plate 22 is increased, the induced draft volume increases and the furnace negative pressure increases; when the opening of the baffle plate 22 is decreased, the induced draft volume decreases and the furnace negative pressure decreases.

[0039] It will be apparent to those skilled in the art that this patent is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this patent. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this patent is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this patent. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A boiler negative pressure regulating and control device, comprising a boiler induced draft fan (1) and an air volume regulating mechanism (2), characterized in that: The input end of the boiler induced draft fan (1) is connected to the exhaust port of the boiler. The boiler induced draft fan (1) is electrically connected to an external power source. The output end of the boiler induced draft fan (1) is equipped with an air volume regulating mechanism (2). The air volume regulating mechanism (2) includes a sliding groove (21), a baffle plate (22) and a sealing plate (23). The side wall of the output end of the boiler induced draft fan (1) is provided with a sliding groove (21). The baffle plate (22) is slidably installed in the sliding groove (21). The side wall of the baffle plate (22) is provided with a sealing plate (23). The sealing plate (23) can fit against the inner wall of the output end of the boiler induced draft fan (1). The side wall of the wind deflector (22) is provided with scale markings (3); A sealing ring (4) is fitted to the inner wall of the sliding groove (21), and the sealing ring (4) can fit against the side wall of the wind deflector (22).

2. The boiler negative pressure regulating and control device according to claim 1, characterized in that: The inner wall of the output end of the boiler induced draft fan (1) is equipped with a limit frame (5). There are two limit frames (5), which are respectively set on the upper and lower sides of the baffle plate (22).

3. The boiler negative pressure regulating and control device according to claim 1, characterized in that: An electrically controlled push rod (6) is installed on the side wall of the output end of the boiler induced draft fan (1). The electrically controlled push rod (6) is electrically connected to an external power source. A connecting frame (7) is installed on the output end of the electrically controlled push rod (6). The connecting frame (7) is installed on the side wall of the baffle plate (22).

4. The boiler negative pressure regulating and control device according to claim 1, characterized in that: The sealing plate (23) includes a plate body (231), a spring (232) and a sealing strip (233). The side wall of the baffle plate (22) is provided with a groove (8). The plate body (231) is slidably installed in the groove (8). The lower wall of the plate body (231) is equipped with a spring (232). The upper wall of the plate body (231) is equipped with a sealing strip (233). The sealing strip (233) can fit against the inner wall of the output end of the boiler induced draft fan (1).

5. A boiler negative pressure regulating and controlling device according to claim 4, characterized in that: The inner wall of the groove (8) is fitted with a pin (9), and the spring (232) is sleeved on the outside of the pin (9). The side wall of the plate (231) is provided with a positioning hole (10), and the pin (9) can be inserted into the positioning hole (10).

6. The boiler negative pressure regulating and controlling device according to claim 1, characterized in that: The output end of the boiler induced draft fan (1) is equipped with a transfer pipe (11), which is connected to an external flue gas treatment device.

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