CN218718846U - Hot air adjusting door sealing device - Google Patents
Hot air adjusting door sealing device Download PDFInfo
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- CN218718846U CN218718846U CN202222287679.XU CN202222287679U CN218718846U CN 218718846 U CN218718846 U CN 218718846U CN 202222287679 U CN202222287679 U CN 202222287679U CN 218718846 U CN218718846 U CN 218718846U
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- stuffing box
- hot air
- shaft
- sealing cover
- door
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Abstract
The utility model relates to the technical field of sealing devices, in particular to a hot air adjusting door sealing device, which comprises a sealing cover, a stuffing box and an extrusion assembly, wherein the sealing cover is hermetically arranged on the side wall of a hot air adjusting door and seals a shaft, the stuffing box is detachably connected on the sealing cover, the extrusion assembly is arranged on the stuffing box and can extrude and seal the shaft, and the sealing cover is provided with an air inlet pipe communicated with an external air pump; the extrusion subassembly is including locating the filler in the stuffing box, sliding connection can carry out the extruded stripper plate and rigid coupling in the stripper plate lateral wall and can carry out the extrusion unit adjusted to the stripper plate position to the filler, has solved the easy ash leakage of the hot-blast adjustment door axle sleeve of traditional coal-fired unit and the cooperation department of axle, leads to the site environment to pollute seriously, has caused the problem of difficulty for the on-the-spot civilized control of power plant.
Description
Technical Field
The application relates to the technical field of sealing devices, and particularly discloses a hot air adjusting door sealing device.
Background
The adjusting door of the coal pulverizing system of the coal-fired unit in China is mostly a shutter type baffle adjusting door, the hot air adjusting door is composed of a frame, a baffle, a door shaft sealing structure, a crank arm and an actuator, and is mainly used for adjusting the medium flow in the coal pulverizing system pipeline, the actuator drives the baffle to rotate, and parameters such as the pressure, the temperature, the flow and the like of the medium in the system are controlled through different medium flows according to different positions of the blade rotation (within 90 degrees).
A direct-blowing pulverizing system is adopted according to a 300MW unit, an HP863 coal mill is arranged, a shutter type baffle hot air adjusting door is adopted, the hot air adjusting door consists of a frame, a baffle, a door shaft sealing structure, a crank arm and an actuator. At present, a hot air adjusting door shaft sealing structure adopts a gland and a shaft sleeve for sealing, the shaft sleeve is arranged on the surface of a door shaft, the gland compresses the shaft sleeve and is fixed with the shaft sleeve of the door shaft through a bolt, the temperature of a hot primary air pipeline is high, the shaft sleeve is very easy to be heated and embrittled, the shaft sleeve can generate certain displacement in the adjusting process of the hot air adjusting door shaft and can continuously extrude the shaft sleeve, the shaft sleeve has no elasticity after embrittled and cannot compensate gaps to cause hot air leakage, the leaked hot primary air carries ash to be washed for a long time, the abrasion of the matching part of the hot air adjusting door shaft sleeve and the shaft is caused, the ash leakage cannot be eliminated only by filler sealing, the serious field environmental pollution is caused, and great difficulty is caused for the field civilized management of a power plant.
Accordingly, the present inventors have made an effort to provide a hot air adjustment door sealing apparatus to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problem that the matching part of the hot air adjusting door shaft sleeve and the shaft of the traditional coal-fired unit is easy to leak ash, which causes serious site environmental pollution ， The method causes difficult problems for on-site civilized treatment of the power plant.
In order to achieve the purpose, the basic scheme of the utility model provides a hot air adjusting door sealing device, which comprises a sealing cover, a stuffing box and an extrusion assembly, wherein the sealing cover is hermetically arranged on the side wall of the hot air adjusting door and seals a shaft, the stuffing box is detachably connected to the sealing cover, the extrusion assembly is arranged on the stuffing box and can extrude and seal the shaft, and an air inlet pipe communicated with an external air pump is arranged on the sealing cover;
the extrusion assembly comprises a filler arranged in a stuffing box, an extrusion plate which is slidably connected in the stuffing box and can extrude the filler, and an extrusion unit which is fixedly connected to the side wall of the extrusion plate and can adjust the position of the extrusion plate.
The principle and effect of this basic scheme lie in:
1. compared with the prior art, the utility model discloses a carry out the sealed cowling sealed at hot-blast adjustment door lateral wall installation counter shaft, form sealed room through the sealed cowling, through admitting air to sealed room and forming sealed wind, hot-blast adjustment door axle sleeve and axle cooperation department are sealed to the area pressure in the sealed cowling, prevent that hot primary air in the hot-blast adjustment door from leaking outward, mainly utilize the pressure differential of sealed wind and hot primary air (through many times experimental sealed wind pressure 14KPa, hot primary air pressure 9KPa in the adjustment door) to reach the problem of avoiding coal-fired unit's hot-blast adjustment door axle sleeve and the cooperation department of axle to leak grey.
2. Compared with the prior art, the utility model discloses a set up gland box and extrusion subassembly, through at gland box intussuseption filler material, extrude the filler through the extrusion subassembly, pack the pressurized counter shaft and seal to realize that good reliable axle is sealed, avoid hot-blast adjusting door inside hot wind to smuggle coal ash secretly and leak and cause environmental pollution.
Furthermore, the extrusion unit comprises a plurality of threaded shafts fixedly connected to the side wall of the extrusion plate and nuts screwed on the threads at the end parts of the threaded shafts, and the stuffing box is provided with a through hole through which the threaded shafts can pass.
Further, a rubber elastic sleeve or a spiral compression spring sleeved on the threaded shaft is arranged between the stuffing box and the nut. The rubber elastic sleeve or the spiral compression spring is arranged to continuously extrude the extrusion plate, so that the acting force is applied to the filler to achieve a better sealing effect, and the coal dust is prevented from leaking outwards.
Further, a sealing gasket is arranged between the stuffing box and the sealing cover. The sealing gasket acts to seal the stuffing box and the sealing cap.
Furthermore, be equipped with the ball valve of being convenient for carry out control to the air input flow in the intake pipe. The air input on the air inlet pipe is controlled by arranging the ball valve, and the adjustment is convenient.
Furthermore, a feed inlet for filling the filler into the filler box is formed in the filler box. The filling of the filler is conveniently carried out in the filler box by arranging the feed inlet.
Furthermore, feed inlet department can dismantle and be connected with the putty head that can carry out the shutoff to the feed inlet, feed inlet department opens there is the internal thread, the overhead external screw thread that is equipped with internal thread looks adaptation of putty.
Furthermore, the sealing cover is installed on the side wall of the hot air adjusting door in a welding mode, and a shaft hole through which a shaft can pass is formed in the center of the sealing cover.
Further, the difference between the aperture of the through hole in the stuffing box and the diameter of the threaded shaft of the extrusion assembly is determined according to the machining eccentricity of the selected threaded shaft.
Further, a pressure control valve is arranged on the air inlet pipe. The pressure in the air inlet pipe is conveniently monitored and controlled by arranging the pressure control valve.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 shows a schematic view of a hot air adjustment door ash leakage in the prior art;
fig. 2 is a schematic view illustrating a hot air adjustment door sealing apparatus according to an embodiment of the present application;
fig. 3 shows a schematic view of a portion a of a hot air adjustment door sealing device according to an embodiment of the present application.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the objects of the present invention, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Reference numerals in the drawings of the specification include: the device comprises a hot air adjusting door 1, a shaft 2, a sealing cover 3, a stuffing box 4, an extrusion plate 5, an air inlet pipe 6, a threaded shaft 7, a nut 8, a feed inlet 9, a plugging head 901, stuffing 10, a spiral compression spring 11, a sealing washer 12, a ball valve 13 and a pressure control valve 14.
An embodiment of a hot air adjustment door sealing device is shown in figures 1, 2 and 3: including seal installation at 1 left side lateral wall of hot-blast adjustment door and with axle 2 carry out sealed cowling 3, can dismantle the stuffing box 4 of connection on sealed cowling 3 and locate on the stuffing box 4 and can carry out extrusion seal's extrusion subassembly to axle 2, the sealed cowling 3 is installed at 1 left side lateral wall of hot-blast adjustment door through the welded form, the central point of sealed cowling 3 puts the department and opens the shaft hole that can hold axle 2 and pass.
An air inlet pipe 6 is arranged on the sealing cover 3, the air inlet pipe 6 adopts a seamless steel pipe with the diameter of 60mm to lead sealing air into the sealing cover 3 on the left side of the hot air adjusting door 1 from an external sealing main pipe, the sealing main pipe is communicated with an air pump, a ball valve 13 is additionally arranged on the air inlet pipe 6, the air inflow on the air inlet pipe 6 is controlled by arranging the ball valve 13, and the air flow is conveniently adjusted; the air inlet pipe 6 is provided with a pressure control valve 14, and the pressure in the air inlet pipe 6 is conveniently monitored by arranging the pressure control valve 14.
The extrusion assembly comprises a filler 10 arranged in a stuffing box 4, an extrusion plate 5 which is slidably connected in the stuffing box 4 and can extrude the filler 10, and an extrusion unit which is fixedly connected to the left side wall of the extrusion plate 5 and can adjust the position of the extrusion plate 5. The extrusion unit comprises a threaded shaft 7 fixedly connected to the side wall of the extrusion plate 5 and a nut 8 screwed on the end part thread of the threaded shaft 7, a through hole capable of allowing the threaded shaft 7 to penetrate through is formed in the stuffing box 4, and the difference between the aperture of the through hole in the stuffing box 4 and the diameter of the threaded shaft 7 of the extrusion assembly is determined according to the machining eccentricity of the threaded shaft 7.
A helical compression spring 11 is arranged between the stuffing box 4 and the nut 8, which helical compression spring 11 is fitted over the threaded spindle 7 (alternatively, the helical compression spring 11 can also be replaced by another compression spring, such as a rubber elastic sleeve). Play the effect of continuously extrudeing stripper plate 5 through setting up rubber elasticity sleeve or helical compression spring 11, and then exert the effort to filler 10 and reach better sealed effect, avoid the buggy to leak outward.
A sealing gasket 12 is arranged between the stuffing box 4 and the sealing cover 3, and the sealing gasket 12 plays a role in sealing the stuffing box 4 and the sealing cover 3. The stuffing box 4 is provided with a feed inlet 9 which can inject stuffing 10 into the stuffing box 4. The filling of the filler 10 into the stuffing box 4 is facilitated by the provision of the feed opening 9. A material blocking head 901 capable of blocking the feed inlet 9 is arranged at the feed inlet 9, an internal thread is arranged at the feed inlet 9, and an external thread matched with the internal thread is arranged on the material blocking head 901.
The utility model discloses in the implementation, through welding the upper seal cover 3 with 1 external seal of the hot-blast adjustment door of coal pulverizer, then through opening ball valve 13, to letting in sealed air in 3 cavities of sealed cover through intake pipe 6 in the sealed cover, let in sealed air back adjustment door axle 2 confined sides and add 3 internal pressures of sealed cover, make atmospheric pressure in the sealed cover 3 reach 12Kpa, the atmospheric pressure is 9Kpa for the hot wind pressure of 1 inside of conventional hot-blast adjustment door, in fact atmospheric pressure 3Kpa in the atmospheric pressure specific hot-blast adjustment door 1 in the sealed cover 3, utilize the atmospheric pressure difference to reach the axle sleeve of avoiding coal-fired unit on the hot-blast adjustment door 1 and the cooperation department of axle 2 appear leaking the ash. In the actual production process, traditional 3 outer wall temperatures of sealed cowling do not throw sealed wind and are 152 ℃, drop into sealed wind back wall temperature and be 57 ℃, can reduce hot-blast adjustment door 1 through installing sealed cowling 3 additional and carry out dispersing of temperature to the outside, reduce staff's operational environment's temperature, simultaneously the utility model discloses be equipped with clamping component, can make stripper plate 5 remove right through twisting nut 8, and then extrude filler 10, the clamping pressure that filler 10 bore and the sealed effect of counter shaft 2 also correspondingly improve this moment to reach better 2 sealed effects of shaft, avoid the external leakage of buggy.
Compared with the prior art, the utility model discloses a sealed formation seal chamber, form sealed wind through admitting air to seal chamber, axle sleeve and the 2 cooperation departments of axle on the hot-blast adjustment door 1 of area pressure seal in the sealed cowling 3, prevent that hot primary air in the hot-blast adjustment door 1 from leaking outward, mainly utilize the pressure differential of sealed wind and hot primary air to reach the hot-blast adjustment door 1 that avoids coal-fired unit and leak grey, install the gland packing 4 additional to the junction of counter shaft 2 simultaneously, extrude filler 10 through the extrusion subassembly on the gland packing 4, filler 10 pressurized seals counter shaft 2, thereby realize that good reliable axle 2 is sealed, moreover, the steam generator is compact in structure, therefore, the clothes hanger is strong in practicability, the easy ash leakage of axle sleeve and the cooperation department of axle 2 on the hot-blast adjustment door 1 of traditional coal-fired unit has been solved, lead to the site environment pollution seriously, on-the-spot civilization of administering power plant has caused the problem of difficulty.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, it is not intended to limit the present invention, and any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any introduction modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention will still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A hot air adjusting door sealing device, which comprises a hot air adjusting door, the method is characterized in that: the hot air adjusting door comprises a sealing cover, a stuffing box and an extrusion assembly, wherein the sealing cover is hermetically arranged on the side wall of the hot air adjusting door and seals a shaft, the stuffing box is detachably connected to the sealing cover, the extrusion assembly is arranged on the stuffing box and can extrude and seal the shaft, and an air inlet pipe communicated with an external air pump is arranged on the sealing cover;
the extrusion assembly comprises a filler arranged in a stuffing box, an extrusion plate which is slidably connected in the stuffing box and can extrude the filler, and an extrusion unit which is fixedly connected to the side wall of the extrusion plate and can adjust the position of the extrusion plate.
2. The hot air adjusting door sealing device according to claim 1, wherein the pressing unit comprises a plurality of threaded shafts fixedly connected to the side walls of the pressing plate and nuts screwed on the threads at the end portions of the threaded shafts, and the stuffing box is provided with through holes through which the threaded shafts can pass.
3. The hot blast adjustment door sealing device according to claim 2, wherein a rubber elastic sleeve or a helical compression spring is provided between the stuffing box and the nut, and the rubber elastic sleeve or the helical compression spring is sleeved on the threaded shaft.
4. The hot blast adjustable door seal assembly of claim 3, wherein a gasket is disposed between said stuffing box and said sealing cap.
5. The hot air adjustment door sealing device of claim 1, wherein the inlet duct is provided with a ball valve for controlling the flow of inlet air.
6. The hot blast adjustment door seal assembly of claim 1, wherein said stuffing box is provided with a feed inlet for introducing stuffing into said stuffing box.
7. The hot air adjusting door sealing device according to claim 6, wherein a material plugging head capable of plugging the feeding opening is detachably connected to the feeding opening, an internal thread is formed at the feeding opening, and an external thread matched with the internal thread is formed on the material plugging head.
8. The hot air adjustment door sealing device as claimed in claim 1, wherein the sealing cover is welded to the sidewall of the hot air adjustment door, and a shaft hole is formed at a central position of the sealing cover for allowing the shaft to pass therethrough.
9. The hot blast adjustment door sealing device according to claim 2, wherein the difference between the diameter of the through hole of said stuffing box and the diameter of the screw shaft of the extruding unit is determined according to the machining eccentricity of the selected screw shaft.
10. The hot blast adjustment door seal assembly of claim 5, wherein said inlet duct is provided with a pressure control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222287679.XU CN218718846U (en) | 2022-08-26 | 2022-08-26 | Hot air adjusting door sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222287679.XU CN218718846U (en) | 2022-08-26 | 2022-08-26 | Hot air adjusting door sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218718846U true CN218718846U (en) | 2023-03-24 |
Family
ID=85630568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222287679.XU Active CN218718846U (en) | 2022-08-26 | 2022-08-26 | Hot air adjusting door sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218718846U (en) |
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2022
- 2022-08-26 CN CN202222287679.XU patent/CN218718846U/en active Active
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