A boiler induced draft device

Abstract

The utility model discloses a kind of boiler induced draft equipment, including induced draft fan, air inlet pipe and air outlet pipe are equipped on the induced draft fan, the mouth of air inlet pipe is equipped with filter screen, dust collection head movable along XY axis is equipped above the filter screen, bristle is ringed and equipped at the bottom edge of dust collection head, the bottom of dust collection head is air inlet end and bristle contacts filter screen top surface, the top of dust collection head is equipped with the connecting pipe connected with external suction equipment. The utility model has the characteristics of automatically cleaning dust accumulated on filter screen, avoiding filter screen blockage induced draft fan air inlet pipe, improving air inlet efficiency, making boiler combustion more sufficient, to further improve the combustion efficiency of boiler etc.

Description

Technical Field

[0001] This utility model relates to a type of induced draft equipment, specifically a boiler induced draft equipment. Background Technology

[0002] The boiler is one of the core pieces of equipment in a thermal power plant, and the induced draft system is an important auxiliary system for boiler operation. Boiler combustion requires sufficient oxygen, and the induced draft equipment is responsible for introducing outside air into the boiler furnace while simultaneously expelling the flue gas produced after combustion. Proper induced draft ensures stable and efficient combustion within the boiler.

[0003] Because there is a lot of dust in the boiler room, the boiler's induced draft equipment blows air containing dust particles into the boiler. On the one hand, this increases the amount of impurities in the boiler, leading to incomplete fuel combustion and boiler blockage. On the other hand, with long-term use, dust and impurities can easily accumulate inside the induced draft equipment, causing damage to the induced draft fan. In the existing technology, a filter screen is usually installed at the air inlet of the induced draft equipment to block external dust and impurities from entering the induced draft equipment.

[0004] However, with long-term use, a large amount of dust and impurities can easily accumulate on the filter screen of the exhaust fan, causing blockage and resulting in poor air intake, which affects the air intake efficiency of the exhaust fan. Moreover, the accumulated dust on the filter screen is not easy to clean and is quite difficult to clean. Utility Model Content

[0005] The purpose of this utility model is to provide a boiler induced draft device that solves the problems of dust accumulation and clogging of the filter screen in the prior art.

[0006] The above-mentioned technical objective of this utility model is mainly achieved through the following technical solution: a boiler induced draft device, including an induced draft fan, an inlet pipe and an outlet pipe on the induced draft fan, a filter screen at the inlet of the inlet pipe, a dust suction head that can move along the XY axis above the filter screen, bristles around the bottom edge of the dust suction head, the bottom of the dust suction head being the air inlet end and the bristles contacting the top surface of the filter screen, and a connecting pipe for connecting to an external suction device at the top of the dust suction head.

[0007] As a further preferred technical solution of this utility model; a rectangular fixing plate extending upward toward the filter screen is provided at the edge of the air inlet pipe, and four horizontally and vertically opposite strip-shaped limiting grooves are provided on the rectangular fixing plate, and a first sliding rod and a second sliding rod are respectively passed through the two opposite strip-shaped limiting grooves.

[0008] As a further preferred technical solution of this utility model; the first slide rod and the second slide rod are perpendicular to each other and arranged vertically, and the first slide rod and the second slide rod are respectively horizontally inserted through the top of the vacuum head and slidably fitted with the vacuum head.

[0009] As a further preferred technical solution of this utility model; one end of the first slide rod and the second slide rod are respectively provided with a first limiting block and a second limiting block located outside the rectangular fixed plate, and the other end of the first slide rod and the second slide rod are respectively connected to the output shaft of the first drive motor and the second drive motor. When the first drive motor and the second drive motor are started, the first slide rod and the second slide rod can be controlled to move laterally along the strip-shaped limiting groove.

[0010] As a further preferred technical solution of this utility model; the outer side of the rectangular fixing plate is provided with two strip-shaped fixing seats for positioning the first drive motor and the second drive motor respectively. The strip-shaped fixing seats are provided with strip-shaped slots that are set towards the strip-shaped fixing seats and cooperate with the upper and lower sides of the first drive motor and the second drive motor. The output shafts of the first drive motor and the second drive motor are respectively provided with a first transmission gear and a second transmission gear. The bottom surface of the strip-shaped slot is provided with a rack that meshes with the first transmission gear or the second transmission gear.

[0011] As a further preferred technical solution of this utility model; the output shafts of the first drive motor and the second drive motor are rotatably connected to the first slide rod and the second slide rod respectively, and the outer walls of the first drive motor and the second drive motor are provided with fixed housings, and the upper and lower sides of the fixed housings are provided with sliders, and the upper and lower sides of the strip-shaped slots are provided with positioning grooves for the sliders to slide.

[0012] Therefore, this utility model has the characteristics of automatically cleaning the dust accumulated on the filter screen, avoiding the filter screen from clogging the air intake pipe of the induced draft fan, improving the air intake efficiency, making the boiler combustion more complete, and thus further improving the combustion efficiency of the boiler. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 yes Figure 1 A structural sectional view. Detailed Implementation

[0015] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0016] like Figure 1-2As shown, a boiler induced draft fan includes an induced draft fan 1. The induced draft fan 1 has an inlet pipe 11 and an outlet pipe 12. A filter screen 21 is installed at the inlet of the inlet pipe 11 to filter dust from the incoming air inside the induced draft fan 1, preventing dust from entering the fan 1. Above the filter screen 21 is a dust suction head 22 that can move along the X and Y axes. Brush bristles 221 are arranged around the bottom edge of the dust suction head 22. The bottom of the dust suction head 22 is the air inlet end, and the brush bristles 221 are in contact with the top surface of the filter screen 21. The dust suction head 22... When moving along the XY axis, the bristles 221 can brush the outward-facing side of the filter screen 21 to agitate the dust when the suction head 22 is suctioning, thereby achieving automatic dust removal from the filter screen 21, increasing the cleaning efficiency of dust, and reducing dust accumulation and residue. The top of the suction head 22 is provided with a connecting pipe 222 that connects to an external suction device. The dust sucked by the suction head 22 is transported to the external device through the connecting pipe 222, thereby achieving rapid cleaning and dust removal from the air inlet pipe 11 of the induced draft fan 1, preventing the filter screen 21 from clogging the air inlet pipe of the induced draft fan, and improving the air intake efficiency.

[0017] The induced draft fan 1 includes a motor and a rotating impeller, which serve as the power source for the induced draft fan. The motor provides power for the rotation of the rotating impeller, converting electrical energy into mechanical energy. The rotating impeller converts the mechanical energy into the kinetic energy and static pressure energy of the gas, enabling the gas to gain energy and be transported out, thereby playing the role of induced draft. This allows the induced draft fan to blow compressed air into the boiler, effectively improving the air intake efficiency, making the boiler combustion more complete, thereby improving the boiler's combustion efficiency and energy utilization rate.

[0018] like Figure 1-2As shown, a rectangular fixing plate 3 extending upwards towards the filter screen 21 is provided at the edge of the air inlet pipe 11. The rectangular fixing plate 3 mates with the edge of the air inlet pipe 11 opening to form a protruding annular fixing plate. The rectangular fixing plate 3 has four horizontally and vertically oriented strip-shaped limiting grooves 31. A first sliding rod 32 and a second sliding rod 33 are respectively inserted between two opposing strip-shaped limiting grooves 31. The two ends of the first sliding rod 32 and the second sliding rod 33 are respectively inserted into the two strip-shaped limiting grooves 31 and can move laterally along the length direction of the two parallel strip-shaped limiting grooves 31. The first sliding rod 32 and the second sliding rod 33 are perpendicular to each other and arranged vertically to make way for each other during movement and avoid mutual interference. The first sliding rod 32 and the second sliding rod 33 are respectively horizontally inserted into the top of the vacuum head 22 and slide together with the vacuum head 22. When the first sliding rod 32 and the second sliding rod 33 move laterally along the strip-shaped limiting grooves 31, the vacuum head 22 can be driven by the lateral movement of the first sliding rod 32 and the second sliding rod 33 along the... The first slide rod 32 moves along the XY axis, thereby automatically sucking up dust above the filter 21 and cleaning the filter 21 to prevent clogging. One end of the first slide rod 32 and the second slide rod 33 are respectively provided with a first limiting block 321 and a second limiting block 331 located outside the rectangular fixed plate 3. The first limiting block 321 and the second limiting block 331 limit the ends of the first slide rod 32 and the second slide rod 33 to ensure the stability of the first slide rod 32 and the second slide rod 33 when they move laterally and prevent them from detaching. The other end of the first slide rod 32 and the second slide rod 33 are respectively connected to the output shaft of the first drive motor 34 and the second drive motor 35. When the first drive motor 34 and the second drive motor 35 are started, they can control the first slide rod 32 and the second slide rod 33 to move laterally along the strip-shaped limiting groove 31, thereby driving the dust suction head 22 to move automatically above the filter 21 through the first slide rod 32 and the second slide rod 33, so as to automatically remove dust from all parts of the filter 21 and reduce space occupation.

[0019] like Figure 2As shown, the rectangular fixing plate 3 has two strip-shaped fixing seats 4 on its outer side, which respectively position the first drive motor 34 and the second drive motor 35. Each strip-shaped fixing seat 4 has a strip-shaped slot 41 that faces the first drive motor 34 and the second drive motor 35 and engages with their upper and lower sides. The strip-shaped fixing seats 4 support and position the first drive motor 34 and the second drive motor 35, so that when the first drive motor 34 and the second drive motor 35 start, they move within the slot 41 due to the limiting effect of the slot 41, thereby driving the first slide rod 32 and the second slide rod 33 to move laterally. The output shafts of the first drive motor 34 and the second drive motor 35 are respectively provided with a first transmission gear 341 and a second transmission gear 351. A rack 42 is provided on the bottom surface of the strip-shaped slot 41 to mesh with either the first transmission gear 341 or the second transmission gear 351. The output shafts of the first drive motor 34 and the second drive motor 35 are rotatably connected to the first slide rod 32 and the second slide rod 33, respectively. A fixed housing 43 is provided on the outer wall of the first drive motor 34 and the second drive motor 35. Sliders 431 are provided on both the upper and lower sides of the fixed housing 43. Positioning grooves 411 for sliding the sliders 431 are provided on both the upper and lower sides of the strip-shaped slot 41. When the first drive motor 34 and the second drive motor 35 are started... When in motion, the output shafts of the first drive motor 34 and the second drive motor 35 rotate. The output shafts of the first drive motor 34 and the second drive motor 35 are rotatably connected to the ends of the first slide rod 32 and the second slide rod 33, respectively. The output shafts of the first drive motor 34 and the second drive motor 35 drive the first transmission gear 341 and the second transmission gear 351 to rotate. When the first transmission gear 341 and the second transmission gear 351 rotate, through meshing with the rack 42, the first transmission gear 341 and the second transmission gear 351 can roll along the rack 42, while the first drive motor 34 and the second drive motor 35 are rotated in conjunction with the slotted strip 41. The fixed housing 43 is equipped with sliders 431 on its upper and lower sides that cooperate with the positioning groove 411. The fixed housing 43 can slide laterally along the strip slot 41 with the first drive motor 34 and the second drive motor 35. Thus, when the first drive motor 34 and the second drive motor 35 are started, the first drive motor 34 and the second drive motor 35 carry the first slide rod 32 and the second slide rod 33 to move laterally along the length direction of the strip slot 41 and the rack 42, thereby driving the vacuum head 22 to move in the XY axis direction, realizing automated and comprehensive dust removal of the filter 21. Moreover, the vacuum head is set to be small in size, which can avoid obstructing or covering the filter 21.

[0020] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A boiler induced draft device, comprising an induced draft fan (1), wherein the induced draft fan (1) is provided with an air inlet pipe (11) and an air outlet pipe (12), characterized in that: The air inlet pipe (11) is provided with a filter screen (21), and a dust suction head (22) that can move along the XY axis is provided above the filter screen (21). The bottom edge of the dust suction head (22) is surrounded by bristles (221). The bottom of the dust suction head (22) is the air inlet end and the bristles (221) are in contact with the top surface of the filter screen (21). The top of the dust suction head (22) is provided with a connecting pipe (222) that connects to an external suction device.

2. The boiler induced draft equipment according to claim 1, characterized in that: The air inlet pipe (11) has a rectangular fixing plate (3) extending upward toward the filter screen (21) at its edge. The rectangular fixing plate (3) has four horizontally and vertically opposite strip-shaped limiting grooves (31). A first sliding rod (32) and a second sliding rod (33) are respectively inserted between two opposite strip-shaped limiting grooves (31).

3. The boiler induced draft equipment according to claim 2, characterized in that: The first slide bar (32) and the second slide bar (33) are perpendicular to each other and arranged vertically. The first slide bar (32) and the second slide bar (33) are respectively horizontally inserted through the top of the vacuum head (22) and slidably fitted with the vacuum head (22).

4. A boiler induced draft fan according to claim 2 or 3, characterized in that: The first slide rod (32) and the second slide rod (33) are respectively provided with a first limiting block (321) and a second limiting block (331) located outside the rectangular fixed plate (3) at one end. The other ends of the first slide rod (32) and the second slide rod (33) are respectively connected to the output shafts of the first drive motor (34) and the second drive motor (35). When the first drive motor (34) and the second drive motor (35) are started, the first slide rod (32) and the second slide rod (33) can be controlled to move laterally along the strip limiting groove (31).

5. A boiler induced draft fan according to claim 4, characterized in that: The rectangular fixing plate (3) has two strip-shaped fixing seats (4) on its outer side, which are respectively positioned for the first drive motor (34) and the second drive motor (35). The strip-shaped fixing seat (4) has a strip-shaped slot (41) facing the strip-shaped fixing seat (4) and cooperating with the upper and lower sides of the first drive motor (34) and the second drive motor (35). The output shafts of the first drive motor (34) and the second drive motor (35) are respectively provided with a first transmission gear (341) and a second transmission gear (351). The bottom surface of the strip-shaped slot (41) is provided with a rack (42) that meshes with the first transmission gear (341) or the second transmission gear (351).

6. A boiler induced draft fan according to claim 5, characterized in that: The output shafts of the first drive motor (34) and the second drive motor (35) are rotatably connected to the first slide rod (32) and the second slide rod (33), respectively. The first drive motor (34) and the second drive motor (35) are provided with a fixed housing (43) on their outer walls. The upper and lower sides of the fixed housing (43) are provided with sliders (431). The upper and lower sides of the strip slot (41) are provided with positioning grooves (411) for the sliders (431) to slide.

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