CN212080199U - Air bag sealing air door structure for gas conveying pipeline - Google Patents
Air bag sealing air door structure for gas conveying pipeline Download PDFInfo
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- CN212080199U CN212080199U CN202020810477.7U CN202020810477U CN212080199U CN 212080199 U CN212080199 U CN 212080199U CN 202020810477 U CN202020810477 U CN 202020810477U CN 212080199 U CN212080199 U CN 212080199U
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Abstract
The utility model relates to a gasbag seals air door structure for gas transmission pipeline belongs to machinery. The driving motor is fixedly arranged at the upper part of the door body, an output shaft of the driving motor is connected with a door shaft, and the door shaft is arranged in the middle of the door body; the air door baffle is fixed on the door shaft and rotates along with the door shaft; the door body is provided with an air bag channel, the sealing air bag is arranged in the air bag channel and is fixed through the fastening assembly, and the sealing air bag is inflated and then contacts with the air door baffle. The characteristics of softness, plasticity and good elasticity of the air bag are utilized, the inflated sealing air bag can be tightly attached to the sealing surface of the air door baffle plate, the capacity of thoroughly cutting off an air duct is realized, the problem of breakage of the sealing surface at the door shaft of the air door baffle plate is effectively solved by the curved surface air door baffle plate and the corresponding air door body structure of the curved surface air door baffle plate, and the air door baffle plate and the sealing air bag form a complete annular sealing structure, so that the good sealing effect is ensured, and the defect that the traditional air door is easy to leak due to rigid contact sealing is.
Description
Technical Field
The utility model relates to the field of machinary, in particular to an air bag sealing air door structure for gas transmission pipeline. The air and flue gas separating device can be applied to air and flue gas systems of power station boilers and industrial boilers and used for separating air channels or flues. Meanwhile, the device can also be applied to gas conveying pipelines without dust (or with micro dust) in other industrial production and used for isolating air channels.
Background
In the boiler flue gas air system, the air door is mainly applied to the boiler air and flue gas system and used for separating air and flue gas air channels so as to meet the requirements of normal operation and maintenance of the boiler.
At present, air doors arranged on smoke air passages of power station boilers and industrial boilers can be divided into two types, namely turnover baffle plates and inserting plates according to the structures of the air doors. The inserting plate type air door is mainly used for air ducts with middle and small sections, and the overturning baffle type air door can be applied to air ducts with various large, middle and small sections.
The turning baffle type air door has two types, namely a single baffle type air door and a multi-baffle louver type air door, and the multi-baffle louver type air door is divided into a single louver type air door and a double louver type air door. The tightness of the single baffle type air door and the single shutter type air door is common, the leakage rate of the common type air door in the initial stage of use can be more than 5%, and the leakage rate of the air door adopting a stainless steel plate sealing strip is also generally more than 1%; because the single-shutter type air door has poor sealing effect, a double-shutter type air door is developed in engineering, the structure of the double-shutter type air door adopts two layers of single shutters, clean sealing air with certain pressure is introduced between the two layers of shutters during use, and air ducts on two sides of the air door are isolated by the sealing air with the pressure higher than that of a working medium, so that an isolation effect is achieved. The air door has a good isolation effect and can achieve zero leakage theoretically, but in practical application, dust accumulation and deformation of the baffle sealing piece are easy to occur to cause poor sealing, and the effect of zero leakage is difficult to achieve. This type of damper is used in flue gas desulfurization systems in many applications.
The plug board type air door has two types of single plug board and double plug board, the single plug board type air door uses the plug board to separate the smoke air duct, and uses the electric locking device to tightly press the plug board and the sealing surface, thereby realizing the separating function of the air door. The air door is mainly applied to clean air media, and the isolation effect is difficult to ensure in a flue containing a large amount of dust; the double-inserting-plate type air door is mainly applied to an inlet hot air channel of a coal mill and used for blocking hot air entering the coal mill, the principle of the double-inserting-plate type air door is similar to that of a double-louver air door, and high-pressure sealing air is introduced between the double inserting plates.
From the above description, the turning baffle type air door has the disadvantages of poor sealing and high leakage rate, and the double-louver type air door has good sealing performance but relatively complex related systems, and the working performance of the double-louver type air door is also affected by bad working environment. The flashboard type air door has good sealing performance but higher requirement on the cleanliness of working media, and can be applied to air ducts and can not be applied to flues.
Disclosure of Invention
An object of the utility model is to provide an air bag sealing air door structure for gas transmission pipeline has solved the above-mentioned problem that prior art exists. The utility model discloses can be applied to wind channel and flue, and let out the leakage rate and hang down, the leakproofness is good, provides better selection for the purchase of air door among the engineering construction. The utility model discloses an air door structure relies on the gasbag to seal, and the air door sets up a shutter seal baffle, and the air door body is equipped with the cross-section and is circular shape air bag, and the air door adopts motor drive and configures one towards, inhale dual-purpose air pump.
The above object of the utility model is realized through following technical scheme:
the air bag sealing air door structure for the gas conveying pipeline is characterized in that a driving motor 1 is fixedly arranged at the upper part of a door body 2, an output shaft of the driving motor 1 is connected with a door shaft 6, and the door shaft 6 is arranged in the middle of the door body 2; the air door baffle 4 is fixed on the door shaft 6 and rotates along with the door shaft 6; the air bag door is characterized in that an air bag channel 5 is arranged on the door body 2, the sealing air bag 3 is arranged in the air bag channel 5 and is fixed through a fastening assembly 7, and the sealing air bag 3 is inflated and then contacts with the air door baffle 4.
Fins 8 are arranged on two sides of the sealing air bag 3, bolt through holes are uniformly distributed in the fins 8, and the sealing air bag 3 is fixed in an air bag channel 5 on the door body 2 through bolts.
The thickness of the fin 8 is at least 4 mm.
The sealing air bag 3 is made of rubber materials, the cross section of the sealing air bag is circular, and the wall thickness of the sealing air bag is 3-6 mm.
And a pressure sensor is arranged on the gas flushing and exhausting pipeline of the sealed air bag 3.
The air door baffle 4 is in a curved surface form, and the curved surface parts are respectively positioned at the door spindle side of the air door baffle.
The beneficial effects of the utility model reside in that: novel conception, simple structure and convenient use. The characteristics of softness, plasticity and good elasticity of the air bag are utilized, the inflated sealing air bag can be tightly attached to the sealing surface of the air door baffle plate to thoroughly separate the air duct, the curved surface air door baffle plate and the corresponding air door body structure thereof effectively solve the problem of breakage of the sealing surface at the door shaft of the air door baffle plate, and the air door baffle plate and the sealing air bag form a complete annular sealing structure, so that the good sealing effect is ensured, and the defect that the traditional air door is easy to leak due to rigid contact sealing is thoroughly overcome. The utility model discloses a tight performance of air door structure obviously is superior to various upset baffle formula air doors to have good adaptability on the dust content at the conveying medium, its simple structure easily makes installation and maintenance, dashes exhaust system equipment few, controls simply, the reliability is high. Provides a new idea for manufacturing air doors in power plants and other industrial industries, and has good application prospect.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate example embodiments of the invention and together with the description serve to explain the invention without limitation.
Fig. 1 is a schematic view of the structure of the present invention;
FIG. 2 is a schematic side view of the present invention;
FIG. 3 is a schematic sectional view A-A of FIG. 1;
fig. 4 is a schematic bottom view of the present invention;
fig. 5 is a partially enlarged schematic view of a portion B of fig. 3.
In the figure: 1. a drive motor; 2. a door body; 3. sealing the air bag; 4. a damper; 5. a balloon channel; 6. a door shaft; 7. a fastening assembly; 8. and a fin.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 5 show, the utility model discloses a sealed air door structure of gasbag for gas transmission pipeline utilizes and aerifys gasbag and the air door type that the sealed face of air door baffle closely laminating established effectively cuts off the wind channel, the air door of this kind of type has simple structure cost low, the rate of leakage is low, cut off the performance good, dash exhaust system simple safe and reliable, can allow the wind channel to carry the medium to have unique advantages such as certain dust content, not only be applicable to the heating power station, the boiler cigarette wind system of power station also can be applied to other industrial industries, has fine application prospect. The air door comprises a driving motor 1, a door body 2, a sealing air bag 3, an air door baffle 4, an air bag channel 5, a door shaft 6, a fastening assembly 7 and fins 8, wherein the driving motor 1 is fixedly arranged on the upper part of the door body 2, an output shaft of the driving motor 1 is connected with the door shaft 6, and the door shaft 6 is arranged in the middle of the door body 2; the air door baffle 4 is fixed on the door shaft 6 and rotates along with the door shaft 6; the air bag door is characterized in that an air bag channel 5 is arranged on the door body 2, the sealing air bag 3 is arranged in the air bag channel 5 and is fixed through a fastening assembly 7 (a fin and a bolt), and the sealing air bag 3 is inflated and then contacts with the air door baffle 4.
Fins 8 are arranged on two sides of the sealing air bag 3, bolt through holes of phi 6 are uniformly distributed on the fins 8, and the sealing air bag 3 is fixed in an air bag channel 5 on the door body 2 through bolts.
The thickness of the fin 8 is at least 4 mm.
The sealing air bag 3 is similar to a bicycle inner tube, is made of rubber materials, and has a circular section and a wall thickness of 3-6 mm. Different types of rubber can be selected according to different conveying gas media, the limit working temperature is about-10 ℃ to 200 ℃, and the working range is 0 ℃ to 150 ℃ in normal use.
And a pressure sensor is arranged on the gas flushing and exhausting pipeline of the sealed air bag 3.
When the air door needs to be closed, the driving motor 1 drives the air door baffle 4 to be in a closed state, the external air pump works to inflate the sealing air bag 3, so that the sealing air bag 3 expands to be tightly attached to the sealing surface of the door body 2 to separate the smoke air channel, the air door is in a closed state, and the air pump stops working; when the air door needs to be opened, the air pump firstly acts to vacuumize the sealed air bag 3, when the sealed air bag 3 is contracted to the worst state and is thoroughly separated from the air door baffle 4, then the driving motor 1 acts to rotate the air door baffle 4 to the same direction as the air flow, and at the moment, the air door is completely opened.
The air charging and discharging pipeline of the sealed air bag 3 is provided with a pressure sensor, and the air pump automatically starts or stops working according to the magnitude of a pressure signal and the opening and closing state of the valve. When the valve is in a closed state, the air pump is automatically started when the pressure in the sealing air bag is reduced to a certain value, so that the sealing air bag 3 keeps enough pressure, and the sealing air bag 3 is tightly attached to the air door baffle 4 to ensure the tightness of the air door; when the valve is in an open state, the air pump automatically starts to vacuumize when the pressure in the sealed air bag 3 is larger than a certain value, so that the sealed air bag 3 is always in a vacuum state and is ready for closing the valve.
When the air door is closed, the sealing air bag 3 is contracted in the air bag channel 5 to prevent the abrasion of the sealing air bag, and a small amount of dust deposited on the sealing air bag by the conveying gas can fall off in the air bag inflation process without influencing the sealing performance of the valve. Because the air airbag has good plasticity, even if the sealing surface of the air door baffle plate is slightly floated or deposited with dirt, the sealing effect of the air door cannot be influenced.
The above description is only a preferred example of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made to the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An air bag sealing air door structure for a gas delivery pipeline is characterized in that: the driving motor (1) is fixedly arranged at the upper part of the door body (2), an output shaft of the driving motor (1) is connected with a door shaft (6), and the door shaft (6) is arranged in the middle of the door body (2); the air door baffle (4) is fixed on the door shaft (6) and rotates along with the door shaft (6); the air door is characterized in that an air bag channel (5) is arranged on the door body (2), the sealing air bag (3) is arranged in the air bag channel (5) and is fixed through a fastening assembly (7), and the sealing air bag (3) is inflated and then is contacted with the air door baffle (4).
2. The air bag sealing damper structure for a gas delivery duct of claim 1, wherein: fins (8) are arranged on two sides of the sealing air bag (3), bolt through holes are uniformly distributed in the fins (8), and the sealing air bag (3) is fixed in an air bag channel (5) on the door body (2) through bolts.
3. The air bag seal damper structure for a gas delivery duct of claim 2, wherein: the thickness of the fin (8) is at least 4 mm.
4. The air bag sealing damper structure for a gas delivery pipe according to claim 1 or 2, wherein: the sealing air bag (3) is made of rubber materials, the cross section of the sealing air bag is circular, and the wall thickness of the sealing air bag is 3-6 mm.
5. The airbag sealing damper structure for a gas delivery duct of claim 4, wherein: and a pressure sensor is arranged on an air flushing and exhausting pipeline of the sealed air bag (3).
6. The air bag sealing damper structure for a gas delivery duct of claim 1, wherein: the air door baffle (4) is in a curved surface form, and the curved surface parts are respectively positioned on the door spindle side of the air door baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020810477.7U CN212080199U (en) | 2020-05-15 | 2020-05-15 | Air bag sealing air door structure for gas conveying pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020810477.7U CN212080199U (en) | 2020-05-15 | 2020-05-15 | Air bag sealing air door structure for gas conveying pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212080199U true CN212080199U (en) | 2020-12-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020810477.7U Active CN212080199U (en) | 2020-05-15 | 2020-05-15 | Air bag sealing air door structure for gas conveying pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212080199U (en) |
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2020
- 2020-05-15 CN CN202020810477.7U patent/CN212080199U/en active Active
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