A gas-fired hot air furnace

Abstract

This utility model belongs to the technical field of hot blast stoves, and relates to a gas-fired hot blast stove, including a base plate. A gas-fired hot blast stove body is mounted on one end of the top surface of the base plate. A burner is mounted on one side of the top surface of the base plate, and the output end of the burner is connected to one side of the gas-fired hot blast stove body. An induced draft fan is mounted on one side of the top surface of the base plate, and the output end of the induced draft fan is connected to one side of the gas-fired hot blast stove body. A process fan is mounted on one end of the top surface of the base plate, and a connecting hose is installed on the side of the process fan closest to the gas-fired hot blast stove body. A support and adjustment assembly is provided on the top surface of the base plate. This utility model, through the provision of the support and adjustment assembly, not only supports the air supply pipe but also facilitates the adjustment of the air supply pipe's position, thereby reducing the impact of environmental factors and the weight of the air supply pipe itself, which could cause positional deviations and affect the seal at the connection between the air supply pipe and the gas-fired hot blast stove body, leading to hot gas leakage.

Description

Technical Field

[0001] This utility model belongs to the field of hot air furnace technology and relates to a gas-fired hot air furnace. Background Technology

[0002] Gas-fired hot air furnaces are devices that use clean energy sources such as natural gas and liquefied petroleum gas as fuel. They generate high-temperature flue gas through combustion, and then transfer the heat to the air through a heat exchanger, ultimately outputting clean hot air. They are widely used in industrial drying, heating, food processing, agricultural greenhouses and other fields.

[0003] During the operation of a gas-fired hot blast stove, an induced draft fan is typically used to continuously deliver external cold air into the stove body. Simultaneously, the burner injects natural gas in a precise ratio and ignites it, using a high-temperature flame to directly heat the air inside the stove. During this process, the process fan starts simultaneously, providing sufficient oxygen to the burner to ensure complete combustion of the natural gas, and accelerating heat exchange through forced convection, so that the heat energy generated by the flame is efficiently transferred to the heated air, ultimately outputting uniformly heated and clean hot air to meet process requirements.

[0004] However, during the operation of the process blower, its conveying pipeline is prone to sagging due to its own weight over long-term operation. Especially in high-temperature environments, the metal pipeline may further deform due to thermal expansion, which may lead to failure of the seal at the pipeline connection, hot air leakage, or even safety hazards such as collision and wear between the pipeline and the gas-fired hot air furnace. Utility Model Content

[0005] The technical problem to be solved by this utility model is that during the operation of the process blower, its conveying pipeline is prone to sagging due to its own weight. Especially in high temperature environments, the metal pipeline may be further deformed due to thermal expansion, which may lead to failure of sealing at the pipeline connection, hot air leakage, and even safety hazards such as collision and wear between the pipeline and the gas hot air furnace.

[0006] The present invention discloses a gas-fired hot air furnace, comprising a base plate, a gas-fired hot air furnace body mounted on one end of the top surface of the base plate, a burner mounted on one side of the top surface of the base plate, the output end of the burner being connected to one side of the gas-fired hot air furnace body, an induced draft fan mounted on one side of the top surface of the base plate, the output end of the induced draft fan being connected to one side of the gas-fired hot air furnace body, a process fan mounted on one end of the top surface of the base plate, a connecting hose mounted on the side of the process fan near the gas-fired hot air furnace body, an air supply pipe connected to the end of the connecting hose away from the process fan, and the other end of the air supply pipe connected to the middle of one end of the gas-fired hot air furnace body, and a support and adjustment assembly provided on the top surface of the base plate.

[0007] The support adjustment assembly includes two sets of hollow tubes, two sets of rack columns, two sets of support rings, two sets of first support plates, and two sets of second support plates. The two hollow tubes are fixed to the top surface of the substrate near the process fan. The two rack columns are slidably connected to the middle of the two sets of hollow tubes. The two support rings are respectively fixed to the top of the two sets of rack columns, and the two sets of support rings are sleeved in the middle of the air supply pipe. The two first support plates are fixed to the top surface of the substrate near the hollow tubes, and the two second support plates are fixed to the top surface of the substrate near the hollow tubes.

[0008] The support adjustment assembly also includes a worm, a driven rod, two sets of drive gears, a worm wheel, and a turntable. The two ends of the worm are rotatably connected to the tops of two sets of first support plates, and the middle of the driven rod is rotatably connected to the tops of two sets of second support plates. The two drive gears are fixed to the two ends of the driven rod, and the two sets of drive gears mesh with the two sets of racks. The worm wheel is fixed to the middle of the driven rod and meshes with the worm. The turntable is fixed to one end of the worm, and a braking mechanism is provided in the middle of the worm.

[0009] The braking mechanism includes a braking gear and a third support plate. The braking gear is fixed to one end of the worm gear near the turntable, and both third support plates are fixed to the top surface of the base plate near the first support plate.

[0010] The braking mechanism also includes a bidirectional lead screw and a guide post. The two ends of the bidirectional lead screw are rotatably connected to the top of the two sets of third support plates, and the two ends of the guide post are fixed to the middle of the two sets of third support plates. The threads of the two ends of the bidirectional lead screw are opposite.

[0011] The braking mechanism also includes two sets of brake rack plates. The tops of the two brake rack plates are respectively threaded to the two sides of the middle of the bidirectional lead screw, and the bottoms of the two brake rack plates are slidably connected to the middle of the guide post.

[0012] Compared with the prior art, the beneficial effects of this utility model are: by setting up the support and adjustment components, not only can the air supply pipe be supported, but the position of the air supply pipe can also be easily adjusted, thereby reducing the influence of the environment and the weight of the air supply pipe itself, which can cause the position to shift, thereby affecting the seal at the connection between the air supply pipe and the main body of the gas-fired hot air furnace, leading to hot steam leakage.

[0013] By setting up a braking mechanism, the worm gear can be braked when it is not working, thereby reducing the likelihood of the worm gear being passively rotated due to lack of restraint, which could affect the position of the air duct and the normal delivery of airflow from the process fan to the main body of the gas-fired hot blast stove. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a structural schematic diagram of the support and adjustment component of this utility model.

[0017] Figure 3 This is a schematic diagram of the support ring structure of this utility model.

[0018] Figure 4 This is a schematic diagram of the worm gear of this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the bidirectional lead screw of this utility model.

[0020] In the diagram: 1. Base plate; 11. Gas-fired hot air furnace body; 12. Burner; 13. Induced draft fan; 14. Process fan; 15. Connecting hose; 16. Air duct; 2. Hollow tube; 21. Rack column; 22. Support ring; 23. First support plate; 24. Second support plate; 3. Worm gear; 31. Driven rod; 32. Drive gear; 33. Worm wheel; 34. Turntable; 4. Brake gear; 41. Third support plate; 5. Double-acting lead screw; 51. Guide column; 6. Brake rack plate. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0023] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] Example 1

[0026] like Figures 1-5 As shown, a gas-fired hot air furnace includes a base plate 1. A gas-fired hot air furnace body 11 is mounted on one end of the top surface of the base plate 1. A burner 12 is mounted on one side of the top surface of the base plate 1, and the output end of the burner 12 is connected to one side of the gas-fired hot air furnace body 11. An induced draft fan 13 is mounted on one side of the top surface of the base plate 1, and the output end of the induced draft fan 13 is connected to one side of the gas-fired hot air furnace body 11. A process fan 14 is mounted on one end of the top surface of the base plate 1. A connecting hose 15 is mounted on the side of the process fan 14 near the gas-fired hot air furnace body 11. An air supply pipe 16 is connected to the end of the connecting hose 15 away from the process fan 14. The other end of the air supply pipe 16 is connected to the middle of one end of the gas-fired hot air furnace body 11. A support and adjustment assembly is provided on the top surface of the base plate 1.

[0027] The support adjustment assembly includes two sets of hollow tubes 2, two sets of rack columns 21, two sets of support rings 22, two sets of first support plates 23, and two sets of second support plates 24. The two hollow tubes 2 are fixed to the top surface of the substrate 1 near the process fan 14. The two rack columns 21 are slidably connected to the middle of the two sets of hollow tubes 2. The two support rings 22 are fixed to the top of the two sets of rack columns 21 respectively, and the two sets of support rings 22 are sleeved in the middle of the air supply pipe 16. The two first support plates 23 are fixed to the top surface of the substrate 1 near the hollow tube 2. The two second support plates 24 are fixed to the top surface of the substrate 1 near the hollow tube 2.

[0028] The support adjustment assembly also includes a worm 3, a driven rod 31, two sets of drive gears 32, a worm wheel 33, and a turntable 34. The two ends of the worm 3 are rotatably connected to the tops of the two sets of first support plates 23, and the middle of the driven rod 31 is rotatably connected to the tops of the two sets of second support plates 24. The two drive gears 32 are fixed to the two ends of the driven rod 31, and the two sets of drive gears 32 mesh with the two sets of rack columns 21. The worm wheel 33 is fixed to the middle of the driven rod 31 and meshes with the worm 3. The turntable 34 is fixed to one end of the worm 3, and a braking mechanism is provided in the middle of the worm 3.

[0029] During operation, cold air is delivered to the main body 11 of the gas-fired hot air furnace by the induced draft fan 13. The burner 12 burns natural gas to heat the air, thereby heating the interior of the main body 11 of the gas-fired hot air furnace. The process fan 14 delivers airflow to the main body 11 of the gas-fired hot air furnace through the connecting hose 15 and the air duct 16. However, under long-term operation, the air duct 16 is prone to positional deviation due to the high temperature environment and its own weight. At this time, the air duct 16 can be supported by the support adjustment component to alleviate the deviation. After the air duct 16 has been working for a period of time, it must be reset periodically. At this time, the turntable 34 can be rotated to drive the worm gear 3 to rotate on the top of the first support plate 23.

[0030] The rotation of the worm 3 will drive the driven rod 31 to rotate on the top of the second support plate 24 through the worm wheel 33. When the driven rod 31 rotates, it will drive the drive gear 32 to move synchronously. At this time, since the drive gear 32 and the rack column 21 are in a meshing state, the rotation of the drive gear 32 will push the rack column 21 to slide in the middle of the hollow tube 2. The sliding of the rack column 21 will drive the support ring 22 to move synchronously, thereby adjusting the position of the air supply pipe 16 and resetting the deviation it has generated. After the position of the air supply pipe 16 is adjusted, the worm 3 can be limited by the braking mechanism.

[0031] This step, through the setting of the support and adjustment components, not only supports the air supply duct 16, but also facilitates the adjustment of the position of the air supply duct 16, thereby reducing the influence of the environment and the weight of the air supply duct 16 itself, which may cause its position to shift, thereby affecting the seal at the connection between the air supply duct 16 and the main body 11 of the gas-fired hot air furnace, leading to hot gas leakage.

[0032] Example 2

[0033] like Figures 1-5 As shown, the braking mechanism includes a brake gear 4 and a third support plate 41. The brake gear 4 is fixed to one end of the worm gear 3 near the turntable 34, and the two third support plates 41 are fixed to the top surface of the base plate 1 near the first support plate 23.

[0034] The braking mechanism also includes a two-way lead screw 5 and a guide post 51. The two ends of the two-way lead screw 5 are rotatably connected to the top of the two sets of third support plates 41, and the two ends of the guide post 51 are fixed to the middle of the two sets of third support plates 41. The threads of the two ends of the two-way lead screw 5 are opposite.

[0035] The braking mechanism also includes two sets of brake rack plates 6. The tops of the two brake rack plates 6 are threaded to the two sides of the middle of the bidirectional lead screw 5, and the bottoms of the two brake rack plates 6 are slidably connected to the middle of the guide post 51.

[0036] During operation, the worm gear 3 rotates synchronously with the brake gear 4. After the position of the air duct 16 is adjusted to a suitable position by rotating the worm gear 3, the double-acting screw 5 can be rotated to drive the two sets of brake rack plates 6 to move. The movement of the brake rack plates 6 is restricted by the setting of the guide post 51, which can change the movement trajectory of the brake rack plates 6. This causes the two sets of brake rack plates 6 to slide in opposite directions in a straight line at the double-acting screw 5 and the guide post 51 until the two sets of brake rack plates 6 slide to mesh with both sides of the brake gear 4. At this point, the rotation of the double-acting screw 5 can be stopped, thus completing the braking work of the worm gear 3.

[0037] This step, through the setting of the braking mechanism, can brake the worm gear 3 when it is not working, thereby reducing the possibility that the worm gear 3 will easily rotate passively due to lack of restraint, which would affect the position of the air supply duct 16 and affect the normal air supply of the process fan 14 to the gas-fired hot blast furnace body 11.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A gas-fired hot-air furnace comprising a base plate (1), characterised in that: A gas-fired hot air furnace body (11) is mounted on one end of the top surface of the substrate (1). A burner (12) is mounted on one side of the top surface of the substrate (1). The output end of the burner (12) is connected to one side of the gas-fired hot air furnace body (11). An induced draft fan (13) is mounted on one side of the top surface of the substrate (1). The output end of the induced draft fan (13) is connected to one side of the gas-fired hot air furnace body (11). A process fan (14) is mounted on one end of the top surface of the substrate (1). A connecting hose (15) is mounted on the side of the process fan (14) closest to the gas-fired hot air furnace body (11). An air supply pipe (16) is connected to the end of the connecting hose (15) away from the process fan (14). The other end of the air supply pipe (16) is connected to the middle of one end of the gas-fired hot air furnace body (11). A support adjustment assembly is provided on the top surface of the substrate (1).

2. A gas-fired hot air furnace as set forth in claim 1 wherein: The support adjustment assembly includes two sets of hollow tubes (2), two sets of rack columns (21), two sets of support rings (22), two sets of first support plates (23) and two sets of second support plates (24). The two hollow tubes (2) are fixed to the top surface of the substrate (1) near the process fan (14). The two rack columns (21) are slidably connected to the middle of the two sets of hollow tubes (2). The two support rings (22) are respectively fixed to the top of the two sets of rack columns (21), and the two sets of support rings (22) are sleeved in the middle of the air supply pipe (16). The two first support plates (23) are fixed to the top surface of the substrate (1) near the hollow tubes (2), and the two second support plates (24) are fixed to the top surface of the substrate (1) near the hollow tubes (2).

3. A gas-fired hot air furnace as set forth in claim 2 wherein: The support adjustment assembly also includes a worm (3), a driven rod (31), two sets of drive gears (32), a worm wheel (33), and a turntable (34). The two ends of the worm (3) are rotatably connected to the top of the two sets of first support plates (23), and the middle part of the driven rod (31) is rotatably connected to the top of the two sets of second support plates (24). The two drive gears (32) are fixed to the two ends of the driven rod (31), and the two sets of drive gears (32) mesh with the two sets of rack columns (21). The worm wheel (33) is fixed to the middle part of the driven rod (31), and the worm wheel (33) meshes with the worm (3). The turntable (34) is fixed to one end of the worm (3), and a braking mechanism is provided in the middle part of the worm (3).

4. A gas-fired hot air furnace according to claim 3, characterized in that: The braking mechanism includes a braking gear (4) and a third support plate (41). The braking gear (4) is fixed to one end of the worm gear (3) near the turntable (34), and the two third support plates (41) are fixed to the top surface of the base plate (1) near the first support plate (23).

5. A gas-fired hot air furnace according to claim 4, characterized in that: The braking mechanism also includes a bidirectional lead screw (5) and a guide post (51). The two ends of the bidirectional lead screw (5) are rotatably connected to the top of two sets of third support plates (41), and the two ends of the guide post (51) are fixed to the middle of the two sets of third support plates (41). The threads of the two ends of the bidirectional lead screw (5) are opposite.

6. A gas-fired hot air furnace according to claim 5, characterized in that: The braking mechanism also includes two sets of brake rack plates (6). The tops of the two brake rack plates (6) are threaded to the two sides of the middle of the bidirectional lead screw (5), and the bottoms of the two brake rack plates (6) are slidably connected to the middle of the guide column (51).

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