Anti-leakage device for flue gas at outlet of induced draft fan

Abstract

The utility model discloses an induced draft fan outlet smoke leakage prevention device, which relates to the field of smoke discharge and comprises a smoke discharge pipeline, a mounting frame arranged at the top end of the smoke discharge pipeline, a hydraulic cylinder arranged in the middle of the top end of the mounting frame, a gate plate arranged at one end of an output shaft of the hydraulic cylinder and matched with the smoke discharge pipeline, and a sealing gasket arranged at the bottom end of the gate plate. A U-shaped hollowed-out groove is formed in the bottom end of the sealing gasket, a U-shaped air suction pipeline is arranged in the U-shaped hollowed-out groove, and a connecting pipe is arranged in the middle of the bottom end of the U-shaped air suction pipeline. A one-way acceleration assembly is arranged in the U-shaped end of the U-shaped air suction pipeline, and a limiting frame matched with the gate plate is arranged in the smoke exhaust pipeline. Under the action of the one-way acceleration assembly, an efficient acceleration channel is provided for flue gas, so that the flue gas flows more quickly and smoothly, unorganized flue gas leaked from a gap is automatically sucked away by means of negative pressure of a flue of the induced draft fan, and leakage of the flue gas is avoided.

Description

Technical Field

[0001] The utility model relates to the field of smoke emission, in particular to a smoke leakage prevention device at an outlet of an induced draft fan. Background Art

[0002] In float glass production lines, the application of induced draft fans is particularly critical because they not only need to handle the gas flow in a high-temperature environment, but also accurately control the atmosphere and pressure conditions in the furnace to ensure the quality of the glass and the continuity of production.

[0003] In the float glass production process, induced draft fans (also called fans or exhaust fans) play a vital role in moving air and other gases to meet various operational and process requirements. Induced draft fans play a dual role in float glass production; on the one hand, they provide necessary ventilation to ensure air quality in the production environment and maintain good working conditions; on the other hand, they increase combustion efficiency and improve production efficiency by providing more oxygen to support the combustion reaction in the furnace or by controlling the gas flow to optimize the heat exchange process in the furnace.

[0004] However, there is a problem of smoke leakage at the connection between the induced draft fan outlet and the flue, especially under positive pressure, which has become a major challenge for environmental management. Because the positive pressure and high wind pressure at the induced draft fan outlet will cause the slight vibration of the flue or the slight change of the air volume to cause the materials originally used to plug the gap to be blown away, resulting in unorganized smoke emission, which not only affects the environment, but also forces employees to perform time-consuming and ineffective plugging operations in an environment of up to 200 degrees Celsius. The unorganized emission of smoke will not only lead to a decline in air quality, posing a threat to the surrounding environment and public health, but may also cause the company to violate environmental regulations.

[0005] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0006] In view of the problems in the related technology, the utility model proposes a smoke leakage prevention device at the outlet of an induced draft fan to overcome the above-mentioned technical problems existing in the existing related technology.

[0007] To this end, the specific technical solutions adopted by the utility model are as follows:

[0008] A device for preventing smoke leakage at an outlet of an induced draft fan comprises a smoke exhaust duct, a mounting frame is arranged at the top end of the smoke exhaust duct, a hydraulic cylinder is arranged at the middle position of the top end of the mounting frame, a gate plate matched with the smoke exhaust duct is arranged at one end of the output shaft of the hydraulic cylinder, a sealing gasket is arranged at the bottom end of the gate plate, a U-shaped hollow groove is opened at the bottom end of the sealing gasket, a U-shaped air intake duct is arranged inside the U-shaped hollow groove, and a connecting pipe is arranged at the middle position of the bottom end of the U-shaped air intake duct; a one-way acceleration component is arranged inside the U-shaped end of the U-shaped air intake duct, and a limit frame matched with the gate plate is arranged inside the smoke exhaust duct.

[0009] Furthermore, in order to provide an efficient acceleration channel for the smoke under the action of the one-way acceleration component and make the smoke flow more rapidly and smoothly, the one-way acceleration component includes a fixed column arranged inside the U-shaped end of the U-shaped intake duct, an air intake channel is opened inside the fixed column, an air intake hole is arranged at one end of the air intake channel, and an exhaust hole is arranged at the other end of the air intake channel.

[0010] Furthermore, in order to achieve effective acceleration and smooth transition of the airflow, the channel group configuration of the central symmetrical structure helps to evenly distribute the smoke flow, reduce turbulence and resistance in the airflow, and thus improve energy efficiency. The air inlet channel includes a plurality of channel groups, and the adjacent channel groups are centrally symmetrical structures. The channel group consists of a first channel and a second channel, one end of the first channel is connected to one end of the second channel, and one end of the first channel is connected to the air inlet, and the other end of the first channel is connected to the other end of the second channel. The first channel includes a contraction section and an expansion section, and one end of the contraction section is connected to one end of the air inlet, and the other end of the contraction section is connected to one end of the expansion section. The second channel includes an arc section and an inclined section, one end of the arc section is connected to one end of the contraction section, the other end of the arc section is connected to one end of the inclined section, and the other end of the inclined section is connected to the other end of the expansion section.

[0011] The beneficial effects of the utility model are:

[0012] 1. The utility model effectively controls the flow direction of smoke in the float glass production line by arranging a hydraulic cylinder and a gate plate at the top of the smoke exhaust pipe, combining a sealing gasket and a U-shaped hollow groove. Under the action of the connecting pipe, it ensures that the smoke can be orderly guided to the U-shaped suction pipe for processing, thereby improving the overall efficiency of smoke exhaust.

[0013] 2. Under the action of the sealing gasket, the utility model enhances the sealing of the smoke exhaust duct and reduces the possibility of smoke leakage. The design of the U-shaped hollow groove can better place the entire U-shaped air intake duct and ensure that the smoke flows more smoothly in the U-shaped air intake duct.

[0014] 3. Under the action of the one-way acceleration component, the utility model provides an efficient acceleration channel for the smoke, making the smoke flow more rapidly and smoothly. The unorganized smoke leaking from the gap is automatically sucked away by the negative pressure of the induced draft fan flue itself, thus avoiding the leakage of smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a structural schematic diagram of a smoke leakage prevention device at an outlet of an induced draft fan according to an embodiment of the utility model;

[0017] Figure 2 This is one of the cross-sectional views of a smoke leakage prevention device at an outlet of an induced draft fan according to an embodiment of the utility model;

[0018] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0019] Figure 4 This is a second cross-sectional view of a device for preventing smoke leakage at an outlet of an induced draft fan according to an embodiment of the utility model;

[0020] Figure 5 yes Figure 4 A partial enlarged view of point B in the middle;

[0021] Figure 6 It is an expanded cross-sectional view of a smoke leakage prevention device at an outlet of an induced draft fan according to an embodiment of the utility model;

[0022] Figure 7 This is one of the cross-sectional views of a one-way acceleration component in a smoke leakage prevention device at an outlet of an induced draft fan according to an embodiment of the utility model;

[0023] Figure 8 This is the second cross-sectional view of a one-way acceleration component in a smoke leakage prevention device at an outlet of an induced draft fan according to an embodiment of the present utility model.

[0024] In the figure:

[0025] 1. Smoke exhaust duct; 2. Mounting frame; 3. Hydraulic cylinder; 4. Gate; 5. Sealing gasket; 6. U-shaped hollow groove; 7. U-shaped suction duct; 8. Connecting pipe; 9. One-way acceleration assembly; 901. Fixed column; 902. Inlet channel; 9021. First channel; 90211. Contraction section; 90212. Expansion section; 9022. Second channel; 90221. Arc section; 90222. Inclined section; 903. Inlet hole; 904. Exhaust hole; 10. Limit frame. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] According to an embodiment of the utility model, a smoke leakage prevention device for an induced draft fan outlet is provided.

[0028] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-Figure 8 As shown, the exhaust fan outlet smoke leakage prevention device according to the embodiment of the utility model comprises a smoke exhaust pipe 1, a mounting frame 2 is arranged at the top of the smoke exhaust pipe 1, a hydraulic cylinder 3 is arranged at the middle position of the top of the mounting frame 2, a gate plate 4 matched with the smoke exhaust pipe 1 is arranged at one end of the output shaft of the hydraulic cylinder 3, a sealing gasket 5 is arranged at the bottom end of the gate plate 4, a U-shaped hollow groove 6 is opened at the bottom end of the sealing gasket 5, a U-shaped suction pipe 7 is arranged inside the U-shaped hollow groove 6, and a connecting pipe 8 is arranged at the middle position of the bottom end of the U-shaped suction pipe 7; a one-way acceleration component 9 is arranged inside the U-shaped end of the U-shaped suction pipe 7, and a limit frame 10 matched with the gate plate 4 is arranged inside the smoke exhaust pipe 1.

[0029] With the aid of the above technical scheme, the utility model effectively controls the flow direction of smoke in the float glass production line by arranging a hydraulic cylinder 3 and a gate plate 4 at the top of the smoke exhaust pipe 1, in combination with a sealing gasket 5 and a U-shaped hollow groove 6, and ensures that the smoke can be orderly guided to the U-shaped suction pipe 7 for treatment under the action of a connecting pipe 8 (in specific applications, one end of the connecting pipe 8 is connected to an induced draft fan, and the unorganized smoke leaking from the gap is automatically sucked away by the negative pressure of the induced draft fan flue itself), thereby improving the overall efficiency of smoke exhaust; under the action of the sealing gasket 5, the sealing of the smoke exhaust pipe 1 is enhanced, and the possibility of smoke leakage is reduced. The design of the U-shaped hollow groove 6 can better place the entire U-shaped suction pipe 7, ensuring that the smoke flows more smoothly in the U-shaped suction pipe 7; under the action of the one-way acceleration component 9, an efficient acceleration channel is provided for the smoke, so that the smoke flows more rapidly and smoothly.

[0030] In one embodiment, for the above-mentioned unidirectional acceleration component 9, the unidirectional acceleration component 9 includes a fixed column 901 arranged inside the U-shaped end of the U-shaped air intake duct 7, an air intake channel 902 is opened inside the fixed column 901, an air intake hole 903 is arranged at one end of the air intake channel 902, and an exhaust hole 904 is arranged at the other end of the air intake channel 902, so that under the action of the unidirectional acceleration component 9, an efficient acceleration channel is provided for the smoke, so that the smoke flows more rapidly and smoothly.

[0031] In one embodiment, for the above-mentioned air inlet channel 902, the air inlet channel 902 includes a plurality of channel groups, and the adjacent channel groups are centrally symmetrical structures, the channel group is composed of a first channel 9021 and a second channel 9022, one end of the first channel 9021 is connected to one end of the second channel 9022, and one end of the first channel 9021 is connected to the air inlet hole 903, and the other end of the first channel 9021 is connected to the other end of the second channel 9022, the first channel 9021 includes a contraction section 90211 and an expansion section 90212, and one end of the contraction section 90211 is connected to one end of the air inlet hole 903, and the other end of the contraction section 90211 is connected to the expansion section 90212. One end is connected, and the second channel 9022 includes an arc segment 90221 and an inclined segment 90222. One end of the arc segment 90221 is connected to one end of the contraction segment 90211, the other end of the arc segment 90221 is connected to one end of the inclined segment 90222, and the other end of the inclined segment 90222 is connected to the other end of the expansion segment 90212. Therefore, through the coordinated use of the contraction segment 90211 and the expansion segment 90212, and the structural optimization of the arc segment 90221 and the inclined segment 90222, effective acceleration and smooth transition of the airflow are achieved, and the channel group configuration of the central symmetrical structure is helpful to evenly distribute the smoke flow, reduce turbulence and resistance in the airflow, and thus improve energy efficiency.

[0032] The working principle of the one-way acceleration component 9 is as follows:

[0033] Under the action of the connecting pipe 8, the smoke can be guided to the U-shaped intake duct 7 for processing in an orderly manner, and enter the one-way acceleration component 9, and can enter the intake channel 902 through the air inlet hole 903, and then can flow toward the exhaust hole 904 under the action of the first channel 9021 and the second channel 9022, thereby realizing the one-way flow of the smoke. Since the fluid has inertia, the flow resistance is different when passing through the first channel 9021 and the second channel 9022 in different directions, thereby realizing one-way flow. One end of the connecting pipe 8 is connected to the induced draft fan, and the unorganized smoke leaking out of the gap is automatically sucked away by the negative pressure of the induced draft fan flue itself.

[0034] In order to facilitate understanding of the above technical solution of the present invention, the working principle or operation method of the present invention in the actual process is described in detail below.

[0035] In actual application, the technical solution of the utility model realizes efficient control, sealing, acceleration and orderly guidance of smoke in the smoke exhaust process of the float glass production line by innovatively combining the hydraulic cylinder 3, the gate 4, the sealing gasket 5, the U-shaped suction duct 7 and the one-way acceleration component 9. The gate 4 driven by the hydraulic cylinder 3 accurately controls the exhaust smoke flow rate, and the sealing gasket 5 and the U-shaped hollow groove 6 are combined to optimize smoke collection and sealing, and the one-way acceleration component 9 is used to effectively accelerate and unidirectionally circulate the smoke, thereby greatly improving the smoke exhaust efficiency and environmental protection performance.

[0036] The working principle of the unidirectional acceleration assembly 9 is as described above.

[0037] In summary, with the aid of the above technical solution of the utility model, the utility model effectively controls the flow direction of smoke in the float glass production line by arranging a hydraulic cylinder 3 and a gate plate 4 at the top of the smoke exhaust pipe 1, in combination with a sealing gasket 5 and a U-shaped hollow groove 6. Under the action of the connecting pipe 8, it is ensured that the smoke can be orderly guided to the U-shaped air intake pipe 7 for treatment, thereby improving the overall efficiency of smoke exhaust; under the action of the sealing gasket 5, the sealing performance of the smoke exhaust pipe 1 is enhanced, and the possibility of smoke leakage is reduced. The design of the U-shaped hollow groove 6 can better place the entire U-shaped air intake pipe 7, ensuring that the smoke flows more smoothly in the U-shaped air intake pipe 7; under the action of the one-way acceleration component 9, an efficient acceleration channel is provided for the smoke, so that the smoke flows more rapidly and smoothly.

[0038] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A smoke leakage prevention device at an outlet of an induced draft fan, comprising a smoke exhaust duct (1), characterized in that: The top of the smoke exhaust pipe (1) is provided with a mounting frame (2), a hydraulic cylinder (3) is provided at the middle position of the top of the mounting frame (2), a gate plate (4) matching with the smoke exhaust pipe (1) is provided at one end of the output shaft of the hydraulic cylinder (3), a sealing gasket (5) is provided at the bottom end of the gate plate (4), a U-shaped hollow groove (6) is provided at the bottom end of the sealing gasket (5), a U-shaped air intake pipe (7) is provided inside the U-shaped hollow groove (6), and a connecting pipe (8) is provided at the middle position of the bottom end of the U-shaped air intake pipe (7); A one-way acceleration component (9) is disposed inside each U-shaped end of the U-shaped air intake duct (7).

2. The device for preventing smoke leakage at the outlet of an induced draft fan according to claim 1, characterized in that: A limiting frame (10) matching with the damper (4) is arranged inside the smoke exhaust pipe (1).

3. The device for preventing smoke leakage at the outlet of an induced draft fan according to claim 1, characterized in that: The one-way acceleration component (9) comprises a fixed column (901) arranged inside the U-shaped end of the U-shaped air intake duct (7), an air intake channel (902) is provided inside the fixed column (901), an air intake hole (903) is provided at one end of the air intake channel (902), and an air exhaust hole (904) is provided at the other end of the air intake channel (902).

4. The device for preventing smoke leakage at the outlet of an induced draft fan according to claim 3, characterized in that: The air intake channel (902) comprises a plurality of channel groups, and adjacent channel groups are centrally symmetrical structures, the channel group consists of a first channel (9021) and a second channel (9022), one end of the first channel (9021) is connected to one end of the second channel (9022), and one end of the first channel (9021) is connected to the air intake hole (903), and the other end of the first channel (9021) is connected to the other end of the second channel (9022).

5. The device for preventing smoke leakage at the outlet of an induced draft fan according to claim 4, characterized in that: The first channel (9021) comprises a contraction section (90211) and an expansion section (90212), and one end of the contraction section (90211) is connected to one end of the air inlet (903), and the other end of the contraction section (90211) is connected to one end of the expansion section (90212).

6. The device for preventing smoke leakage at the outlet of an induced draft fan according to claim 5, characterized in that: The second channel (9022) comprises an arc segment (90221) and an inclined segment (90222), one end of the arc segment (90221) is connected to one end of the contraction segment (90211), the other end of the arc segment (90221) is connected to one end of the inclined segment (90222), and the other end of the inclined segment (90222) is connected to the other end of the expansion segment (90212).

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