A bellows for a boiler

Abstract

The utility model discloses a kind of wind boxes for boiler, including wind box shell and locking mechanism;The right side wall of wind box shell is provided with temperature discharge port, the left side wall of wind box shell is equipped with air pipe, wind box shell is rotated with baffle between front and back inner wall by rotating shaft, baffle is used with temperature discharge port and air pipe respectively;Locking mechanism: it includes installation shell, locking rod, first magnet, second magnet and unlocking ring, the left side inner wall of wind box shell is fixedly connected respectively in the both ends of installation shell, the inside of installation shell is equipped with locking rod, the left side of baffle is fixedly connected with locking block in the both ends, the outer side of two locking blocks is provided with locking hole, locking hole is used with the locking rod adjacent to left side, the outer cam surface of locking rod is equipped with unlocking ring, this wind box for boiler, when stopping wind, automatically open the temperature discharge port of wind box to prevent equipment from being damaged, and unlocking maintenance is convenient.

Description

Technical Field

[0001] This utility model relates to the field of boiler exhaust technology, specifically a boiler air box. Background Technology

[0002] In the fields of industrial production and energy supply, boilers, as core thermal power equipment, are widely used in various scenarios such as power, chemical, metallurgy, and civil heating. Their operating efficiency and safety are directly related to production continuity and operating costs. Stable combustion of boilers depends on precise air supply control. As a key component of the boiler air supply system, the air box undertakes the core functions of airflow distribution, pressure buffering, and air source delivery. Its performance design must take into account both air supply stability and equipment protection safety to adapt to the combustion requirements of the boiler under different loads, while also dealing with risk prevention and control under sudden operating conditions.

[0003] The existing hot air furnace has a cooling fan installed at the top of the furnace body. The fan draws in cold air from outside into the furnace body, heats it, and then transfers it to the outside of the furnace. However, if there is a power outage, damage to the fan circuit, or damage to the controller, causing the fan to stop operating, the temperature inside the boiler continues to rise and is transferred towards the fan, resulting in the fan being unable to cool down and thus being damaged. To address this, we propose a boiler air box. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a boiler wind box that automatically opens the exhaust port of the wind box to prevent equipment damage when the air is stopped, and is easy to unlock and maintain, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a boiler wind box, comprising a wind box shell and a locking mechanism;

[0006] The outer shell of the air box has a temperature exhaust port on its right side wall and an air duct installed on its left side wall. A wind baffle is rotatably connected between the front and rear inner walls of the air box via a rotating shaft. The wind baffle is used in conjunction with the temperature exhaust port and the air duct, respectively.

[0007] Locking mechanism: It includes a mounting shell, a locking rod, a first magnet, a second magnet, and an unlocking ring. The mounting shell is fixedly connected to the front and rear ends of the left inner wall of the wind box shell. The interior of each mounting shell is equipped with a locking rod. The front and rear ends of the left side of the wind deflector are fixedly connected with locking blocks. Locking holes are opened on the opposite outer sides of the two locking blocks. The locking holes cooperate with the adjacent locking rod on the left side. The outer arc surface of each locking rod is fitted with an unlocking ring. The first magnet is fixedly connected to the left inner wall of each of the two mounting shells. The second magnet is fixedly connected to the front and rear ends of the left side of the wind deflector. The second magnet cooperates with the adjacent first magnet on the left side. When the air supply stops, the exhaust port of the wind box is automatically opened to prevent equipment damage, and unlocking and maintenance are convenient.

[0008] Furthermore, the locking mechanism also includes a limiting plate, a replacement plate, and a spring. The replacement plates are threaded to the opposite outer walls of the two mounting shells, and each replacement plate has a round hole in its center. The locking rods are located inside the adjacent round holes. The limiting plates are fixedly connected to the center of the outer arc surfaces of the two locking rods. Springs are provided between the limiting plates and the adjacent replacement plates, and the springs are sleeved on the outer arc surfaces of the adjacent locking rods for easy resetting.

[0009] Furthermore, it also includes sliding holes, which are respectively opened on the opposite outer side walls of the two mounting shells. Unlocking rods are slidably connected inside the sliding holes, and rotating rings are rotatably connected to the outer arc surfaces of the unlocking rods. The rotating rings are fixedly connected to the horizontally adjacent unlocking rings by fixing rods, which facilitates driving the unlocking rings to move.

[0010] Furthermore, the locking mechanism also includes unlocking plates, which are fixedly connected to the lower ends of the outer arc surfaces of the two unlocking rods on opposite inner sides. The unlocking plates are used in conjunction with the first and second magnets that are adjacent to each other to block the attraction force of the first and second magnets.

[0011] Furthermore, it also includes rectangular pieces, which are fixedly connected to the upper end of the outer arc surface of the two unlocking rods opposite to their outer ends. The upper end of the inner arc surface of the sliding hole is provided with a rectangular groove corresponding to the adjacent rectangular pieces, which is used to temporarily fix the unlocked state.

[0012] Furthermore, it also includes circular pieces, which are fixedly connected to the outer arc surfaces of the two unlocking rods opposite to their outer ends and are both located outside the adjacent mounting shells. The diameter of each circular piece is larger than the diameter of the adjacent sliding holes to prevent the unlocking rods from falling off.

[0013] Furthermore, a control switch is provided on the left side of the bellows housing, and the input terminal of the control switch is electrically connected to an external power source for stable driving.

[0014] Furthermore, a fan is installed inside the duct, and the input end of the fan is electrically connected to the output end of the control switch to deliver air stably.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This boiler wind box has the following advantages:

[0016] By using a fan to drive airflow and push the windshield to block the exhaust port, heat leakage during air supply can be prevented, providing a stable air source for boiler combustion. In case of emergencies such as fan failure, the windshield can naturally droop under the action of gravity and magnetic attraction, and quickly achieve mechanical locking with the locking mechanism, opening the exhaust port to discharge high-temperature hot air from the furnace, effectively preventing hot air from backflowing and damaging the fan and furnace body. At the same time, its locking mechanism is equipped with a convenient manual unlocking structure, which can be quickly unlocked by pulling or rotating the unlocking rod. The overall structure takes into account the reliability of automatic protection and the convenience of later maintenance, greatly improving the safety of boiler operation and the durability of the wind box. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the exhaust port shield of this utility model;

[0019] Figure 3 This is a schematic diagram of the open exhaust port structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the front structure of this utility model;

[0021] Figure 5 This is a partial cross-sectional structural diagram of the windshield of this utility model;

[0022] Figure 6 This is an enlarged structural schematic diagram of point A of this utility model;

[0023] Figure 7 This is a partial structural diagram of the unlocking rod of this utility model.

[0024] In the diagram: 1. Airbox housing, 2. Locking mechanism, 21. Mounting housing, 22. Locking rod, 23. Limiting plate, 24. Replacement plate, 25. Spring, 26. First magnet, 27. Second magnet, 28. Unlocking ring, 29. Unlocking plate, 3. Rotating shaft, 4. Windshield, 5. Temperature exhaust port, 6. Air duct, 7. Fan, 8. Sliding hole, 9. Unlocking rod, 10. Rotating ring, 11. Rectangular plate, 12. Rectangular groove, 13. Circular plate, 14. Control switch, 15. Locking hole, 16. Locking block. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-7This embodiment provides a technical solution: a boiler wind box, including a wind box shell 1 and a locking mechanism 2;

[0027] The outer casing 1 of the air box has a heat exhaust port 5 on its right side wall (the lower end of the air box casing 1 is the air supply port). The left side wall of the air box casing 1 is equipped with an air duct 6. The front and rear inner walls of the air box casing 1 are connected by a rotating shaft 3 to a wind baffle 4. The wind baffle 4 is used in conjunction with the heat exhaust port 5 and the air duct 6 respectively. The left side of the air box casing 1 is equipped with a control switch 14. The input end of the control switch 14 is electrically connected to an external power source. The air duct 6 is equipped with a fan 7 (a fan cover can be installed at the rear end of the air duct 6 so that the fan 7 is located inside the fan cover, which can filter and block dust to avoid affecting the fan 7). The input end of the fan 7 is electrically connected to the output end of the control switch 14. The front and rear side walls of the air box casing 1 are both hinged with unlocking doors. The end of the unlocking door away from the hinge is equipped with a closing lock between the front and rear side walls of the air box casing 1. The closing lock is a commonly used closing lock in the prior art.

[0028] Locking mechanism 2: It includes a mounting shell 21, a locking rod 22, a first magnet 26, a second magnet 27, and an unlocking ring 28. The mounting shell 21 is fixedly connected to the front and rear ends of the left inner wall of the wind box shell 1. The mounting shell 21 is equipped with a locking rod 22 inside each of the mounting shells. The front and rear ends of the left side of the windshield 4 are fixedly connected with locking blocks 16. The opposite outer sides of the two locking blocks 16 are provided with locking holes 15. The locking holes 15 are used in conjunction with the adjacent locking rod 22 on the left side (the left end of the locking block 16 is provided with a bevel). The outer arc surface of the locking rod 22 is fitted with an unlocking ring 28. The first magnet 26 is fixedly connected to the left inner wall of the two mounting shells 21. The second magnet 27 is fixedly connected to the front and rear ends of the left side of the windshield 4. The second magnet 27 is fixedly connected to the front and rear ends of the left side of the windshield 4. In conjunction with the first magnet 26 adjacent to the left, the locking mechanism 2 also includes a limiting plate 23, a replacement plate 24, and a spring 25. The replacement plates 24 are threaded to the opposite outer walls of the two mounting shells 21. Each replacement plate 24 has a round hole in its center. The locking rods 22 are located inside the adjacent round holes. The limiting plates 23 are fixedly connected to the center of the outer arc surfaces of the two locking rods 22. A spring 25 is provided between the limiting plates 23 and the adjacent replacement plates 24. The springs 25 are sleeved on the outer arc surfaces of the adjacent locking rods 22. The mechanism also includes a sliding hole 8, which is opened on the opposite outer walls of the two mounting shells 21. An unlocking rod 9 is slidably connected inside each sliding hole 8. A rotating ring 10 is rotatably connected to the outer arc surface of each unlocking rod 9. The horizontally adjacent unlocking rings 28 are all fixedly connected by fixing rods. The locking mechanism 2 also includes unlocking pieces 29, which are fixedly connected to the lower ends of the outer arc surfaces of the two unlocking rods 9 on opposite inner sides. The unlocking pieces 29 are used in conjunction with the first magnet 26 and the second magnet 27 that are adjacent to each other. It also includes rectangular pieces 11, which are fixedly connected to the upper ends of the outer arc surfaces of the two unlocking rods 9 opposite to their outer sides. The upper ends of the inner arc surfaces of the sliding holes 8 are all provided with rectangular grooves 12 corresponding to the adjacent rectangular pieces 11. It also includes circular pieces 13, which are fixedly connected to the outer arc surfaces of the two unlocking rods 9 opposite to their outer sides and are located outside the adjacent mounting shells 21. The diameter of the circular pieces 13 is larger than the diameter of the adjacent sliding holes 8. First, through External bolts install the bellows casing 1 to the air inlet at the top of the boiler. Then, external power is connected via control switch 14, starting the fan 7 inside the duct 6. The airflow generated by the fan 7 enters the bellows casing 1 through the duct 6. The airflow exerts a rightward thrust on the baffle 4, causing it to rotate clockwise around the shaft 3 until the baffle 4 blocks the exhaust port 5, preventing heat leakage during air supply. Because the exhaust port 5 is blocked by the baffle 4, the airflow is delivered to the boiler furnace along the air outlet at the bottom of the bellows casing 1, providing a stable air source for fuel combustion. When a power outage, fan circuit failure, or controller malfunction causes the fan 7 to stop operating, the duct 6 stops supplying airflow into the bellows, and the baffle 4 loses its rightward thrust. At this time, the baffle 4, under its own weight,...As the windshield 4 rotates counterclockwise around axis 3 and hangs down naturally, the second magnet 27 on the left side of the windshield 4 gradually approaches the first magnet 26 inside the mounting shell 21. The two magnets attract each other due to their opposite poles. Simultaneously, the rotation of the windshield 4 causes the locking block 16 to move synchronously. The inclined surface at the left end of the locking block 16 contacts the right end of the locking rod 22 and pushes it to slide inwards towards the mounting shell 21, compressing the spring 25. When the locking block 16 moves to the point where the locking rod 22 aligns with the locking hole 15, the spring 25, under the action of elastic potential energy, pushes the locking rod 22 into the locking hole 15, achieving mechanical locking of the windshield 4. This allows the windshield 4 to block the air duct 6, and the exhaust port 5 to be fully open. High-temperature hot air accumulated inside the boiler due to the shutdown of the ventilation system can be quickly discharged outwards through the exhaust port 5, preventing the hot air from being conducted backwards along the air duct 6 to the fan 7, effectively preventing damage to the fan 7 due to excessive temperature. It also reduces the risk of damage to the boiler body from high temperatures. To unlock the windshield 4, the front and rear side walls of the wind box shell can be opened first. To unlock the door, the operator pulls the circular piece 13 outward, causing the unlocking rod 9 to slide outward along the sliding hole 8. The unlocking rod 9 pulls the unlocking ring 28 through the rotating ring 10 and the fixed rod, thereby causing the locking rod 22 to exit the locking hole 15, achieving manual unlocking. During this process, the rectangular piece 11 moves to the outside of the mounting shell 21 through the rectangular groove 12. If it is necessary to temporarily fix the unlocked state, rotate the unlocking rod 9, and the rectangular piece 11 will rotate accordingly, moving away from the rectangular groove 12 and forming a limit with the side wall of the mounting shell 21, restricting the unlocking rod 9 from resetting. At the same time, the unlocking piece 29 on the inner side of the unlocking rod 9 moves and inserts between the first magnet 26 and the second magnet 27, using its non-magnetic properties to block the attraction between the two. At this time, the windshield 4 can be unlocked and rotated freely. When the spring 25 loses its elasticity, the replacement plate 24 can be unscrewed to replace the spring 25, ensuring the reliability of the locking mechanism, improving the combustion efficiency of the boiler by providing stable air supply, automatically opening the exhaust port 5 to prevent equipment damage when the air supply stops, and making unlocking and maintenance convenient.

[0029] The working principle of the boiler wind box provided by this utility model is as follows: First, the wind box shell 1 is installed to the air inlet at the top of the boiler using external bolts. Then, the external power supply is connected through the control switch 14, and the fan 7 inside the air duct 6 is started. The airflow generated by the fan 7 enters the wind box shell 1 through the air duct 6. The airflow exerts a rightward thrust on the wind baffle 4, pushing the wind baffle 4 to rotate clockwise around the rotating shaft 3 until the wind baffle 4 blocks the exhaust port 5, preventing heat leakage during air supply. Because the exhaust port 5 is blocked by the wind baffle 4, the airflow is transported to the boiler furnace along the air outlet at the lower end of the wind box shell 1, providing a stable air source for fuel combustion. In case of power failure, fan circuit failure, or control failure, the wind box can be shut off. When the fan 7 stops operating due to damage to the controller, the air duct 6 no longer supplies airflow into the air box, and the windshield 4 loses its rightward thrust. Under its own weight, the windshield 4 rotates counterclockwise around the axis 3 and hangs down naturally. During this process, the second magnet 27 on the left side of the windshield 4 gradually approaches the first magnet 26 inside the mounting housing 21 as it rotates. The two magnets attract each other due to their opposite poles. Simultaneously, the rotation of the windshield 4 causes the locking block 16 to move synchronously. The inclined surface at the left end of the locking block 16 contacts the right end of the locking rod 22 and pushes it to slide inward into the mounting housing 21, compressing the spring 25. When the locking block 16 moves until the locking rod 22 aligns with the locking hole 15, the spring 25... Under the action of elastic potential energy, the locking rod 22 is pushed into the locking hole 15, realizing the mechanical locking of the windshield 4. This allows the windshield 4 to block the air duct 6, and the exhaust port 5 to be fully open. The high-temperature hot air accumulated inside the boiler due to the shutdown of the air supply can be quickly discharged outward through the exhaust port 5, preventing the hot air from being conducted backward along the air duct 6 to the fan 7. This effectively prevents the fan 7 from being damaged due to excessive temperature and also reduces the risk of damage to the boiler body from high temperature. When it is necessary to unlock the windshield 4, the unlocking door on the front and rear side walls of the wind box shell can be opened first. The operator pulls the disc 13 outward, causing the unlocking rod 9 to slide outward along the sliding hole 8. The unlocking rod 9 pulls the unlocking ring 28 through the rotating ring 10 and the fixed rod, thereby driving the fan to release the hot air. Locking rod 22 exits locking hole 15, enabling manual unlocking. During this process, rectangular piece 11 moves to the outside of mounting shell 21 through rectangular groove 12. If the unlocked state needs to be temporarily fixed, the unlocking rod 9 is rotated, and rectangular piece 11 rotates accordingly, moving away from rectangular groove 12 and forming a limit with the side wall of mounting shell 21, restricting the unlocking rod 9 from resetting. At the same time, the unlocking piece 29 on the inner side of unlocking rod 9 moves and inserts between the first magnet 26 and the second magnet 27, using its non-magnetic properties to block the attraction between the two. At this time, windshield 4 can be unlocked and rotated freely. When spring 25 loses its elasticity, replacement plate 24 can be unscrewed to replace spring 25, ensuring the reliability of the locking mechanism.

[0030] It is worth noting that the fan 7 disclosed in the above embodiments can be a high-temperature resistant fan of model FT35-11, and the control switch 14 is provided with a control button corresponding to the fan 7 and used to control its switch.

[0031] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A boiler bellows, characterized in that: Includes a bellows housing (1) and a locking mechanism (2); The outer shell of the bellows (1): a heat exhaust port (5) is provided on its right side wall, and a duct (6) is installed on the left side wall of the bellows (1). A wind deflector (4) is rotatably connected between the front and rear inner walls of the bellows (1) via a pivot (3). The wind deflector (4) is used in conjunction with the heat exhaust port (5) and the duct (6) respectively. Locking mechanism (2): It includes a mounting shell (21), a locking rod (22), a first magnet (26), a second magnet (27), and an unlocking ring (28). The mounting shell (21) is fixedly connected to the front and rear ends of the left inner wall of the wind box shell (1). The mounting shell (21) is provided with a locking rod (22) inside. The front and rear ends of the left side of the windshield (4) are fixedly connected with locking blocks (16). The opposite outer sides of the two locking blocks (16) are provided with locking holes (15). The locking holes (15) are used in conjunction with the adjacent locking rod (22) on the left side. The outer arc surface of the locking rod (22) is fitted with an unlocking ring (28). The first magnet (26) is fixedly connected to the left inner wall of the two mounting shells (21). The second magnet (27) is fixedly connected to the front and rear ends of the left side of the windshield (4). The second magnet (27) is used in conjunction with the adjacent first magnet (26) on the left side.

2. A boiler wind box according to claim 1, characterized in that: The locking mechanism (2) further includes a limiting plate (23), a replacement plate (24), and a spring (25). The replacement plate (24) is threaded to the opposite outer walls of the two mounting shells (21). A round hole is provided in the middle of each replacement plate (24). The locking rods (22) are located inside the adjacent round holes. The limiting plate (23) is fixedly connected to the middle of the outer arc surface of the two locking rods (22). A spring (25) is provided between the limiting plate (23) and the adjacent replacement plates (24). The springs (25) are sleeved on the outer arc surface of the adjacent locking rods (22).

3. A boiler wind box according to claim 1, characterized in that: It also includes sliding holes (8), which are respectively opened on the opposite outer side walls of the two mounting shells (21). The sliding holes (8) are slidably connected to the interior of each sliding hole (8), and the outer arc surface of each unlocking rod (9) is rotatably connected to a rotating ring (10). The rotating ring (10) and the horizontally adjacent unlocking ring (28) are fixedly connected by a fixing rod.

4. A boiler wind box according to claim 3, characterized in that: The locking mechanism (2) also includes an unlocking piece (29), which is fixedly connected to the lower end of the outer arc surface of the two unlocking rods (9) on opposite inner sides. The unlocking pieces (29) are used in conjunction with the first magnet (26) and the second magnet (27) that are adjacent to each other.

5. A boiler wind box according to claim 3, characterized in that: It also includes rectangular pieces (11), which are fixedly connected to the upper end of the outer arc surface of the two unlocking rods (9) opposite to the outer side. The upper end of the inner arc surface of the sliding hole (8) is provided with a rectangular groove (12) corresponding to the rectangular pieces (11) adjacent to the front and rear.

6. A boiler wind box according to claim 1, characterized in that: It also includes a disc (13), which is fixedly connected to the outer arc surface of the two unlocking rods (9) opposite to the outer side and is located outside the adjacent mounting shell (21). The diameter of the disc (13) is larger than the diameter of the adjacent sliding hole (8).

7. A boiler wind box according to claim 1, characterized in that: A control switch (14) is provided on the left side of the bellows shell (1), and the input end of the control switch (14) is electrically connected to an external power source.

8. A boiler wind box according to claim 7, characterized in that: A fan (7) is installed inside the air duct (6), and the input end of the fan (7) is electrically connected to the output end of the control switch (14).

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