CN217302866U - Sealing device of rotary preheater - Google Patents

Abstract

The utility model discloses a rotary preheater's sealing device, including the connecting plate, set up in the closing plate of connecting plate top, set up in the radial baffle of connecting plate one side, set up in the radial baffle with fastening sliding assembly between the connecting plate, and set up in the embedded subassembly of connecting plate one end. The beneficial effects of the utility model are that the triangular space problem of leaking out of rotary preheater can be solved.

Description

Sealing device of rotary preheater

Technical Field

The utility model relates to a rotary air heater technical field, especially a rotary air heater's sealing device.

Background

The rotary air preheater is a flue gas tail end heat exchange device commonly adopted on a large-scale boiler of a power plant, compared with a tubular air preheater, the rotary air preheater has the characteristics of compact structure, small volume, high density of heat exchange surfaces, light overall weight, low metal consumption, convenience for installation and arrangement, lighter low-temperature corrosion than that of the tubular heat exchanger and the like, and is suitable for being used on the large-scale boiler, but the rotary air preheater has the defects of large air leakage quantity, 6-8% when the working condition is good, and 20-30% when the sealing is poor. The higher air leakage rate causes the air pressure at the inlet of the preheater to be reduced, the current of a fan to be increased, the excess air coefficient behind the preheater to be increased, the temperature of tail exhaust gas to be reduced, the heat efficiency of the boiler to be reduced, the coal consumption to be increased and the boiler not to reach the rated load. The main air leakage problem is exactly that rotary air heater moves, rotor hot junction (exhanst gas inlet and air outlet department) temperature is higher, cold junction (exhanst gas outlet and air inlet department) temperature is lower, it is unbalanced to lead to radial baffle upper and lower temperature, the thermal expansion volume is inconsistent, the rotor leads to producing mushroom deformation formation "triangle area of leaking wind because of being heated inhomogeneously, traditional closing plate is direct to be connected with radial baffle, because the rotor is heated inhomogeneously and leads to down the skew, radial baffle also can squint, and the closing plate is direct to be connected with radial baffle, it is corresponding also can squint, cause the clearance grow between closing plate and the fan-shaped sealing area, the volume of leaking wind grow thereupon, cause economic loss and potential safety hazard.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above-mentioned problems or the problems occurring in the prior art.

Therefore, the utility model aims at providing a rotary preheater's sealing device, it can solve the problem of the triangle leak hunting district that forms between rotary air preheater radial baffle and the closing plate.

In order to solve the technical problem, the utility model provides a following technical scheme: a sealing device of a rotary preheater comprises a sealing device, wherein the sealing device comprises a connecting plate, a sealing plate arranged above the connecting plate, a radial partition plate arranged on one side of the connecting plate, a fastening sliding assembly arranged between the radial partition plate and the connecting plate, and an embedded assembly arranged at one end of the connecting plate.

As an optimized proposal of the sealing device of the rotary preheater of the utility model, wherein: the connecting plate comprises a lug arranged at the top of the connecting plate, the sealing plate comprises a groove arranged at the bottom of the sealing plate, and the lug is inserted into the groove; a threaded hole is arranged between the convex block and the groove and is connected with the convex block through a screw.

As an optimized proposal of the sealing device of the rotary preheater of the utility model, wherein: the radial partition plate and the connecting plate are both provided with through self-adjusting ports, and the self-adjusting ports are divided into an upper rectangular port and a lower semicircular port; the fastening slide assembly is disposed within the self-adjusting aperture.

As an optimized proposal of the sealing device of the rotary preheater of the utility model, wherein: the fastening sliding assembly comprises a screw cap arranged on the outer side of the radial partition plate, a stud connected with the screw cap, and a nut connected with the stud and arranged on the outer side of the connecting plate.

As an optimized proposal of the sealing device of the rotary preheater of the utility model, wherein: the diameter of the self-adjusting opening is larger than that of the stud, and the diameters of the nut and the nut are larger than that of the self-adjusting opening.

As an optimized solution of the sealing device of the rotary preheater of the present invention, the sealing device further comprises a rotary preheater assembly, which includes a rotor and a rotor center bearing disposed in the middle of the rotor.

As a preferred scheme of the sealing device of the rotary preheater of the utility model, the embedded component comprises an embedded block integrally formed with one end of the connecting plate and two groups of convex through holes symmetrically arranged on the embedded block; the rotor center bearing is provided with a convex block matched with the convex through opening.

As an optimized proposal of the sealing device of the rotary preheater of the utility model, wherein: the side edge of the rotor center bearing is provided with a threaded hole and is connected with the rotor center bearing through a screw.

As an optimized proposal of the sealing device of the rotary preheater of the utility model, wherein: the rotary preheater assembly further comprises a sector plate arranged at the upper end of the sealing plate and in sealing fit with the sealing plate.

As an optimized proposal of the sealing device of the rotary preheater of the utility model, wherein: the sealing devices are arranged in groups and arranged above the rotor in an array mode.

The utility model has the advantages that: the utility model discloses a set up the connecting plate on the radial baffle of rotation air preheater, set up fastening slider on connecting plate and radial baffle, do not receive the influence of the former radial baffle downward heat altered shape of rotor to reach and compensate "triangular space air leakage" problem that fixed sealed exists, reduce economic loss and reduce the hidden danger.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

fig. 1 is an overall structural view of a sealing apparatus of a rotary preheater.

FIG. 2 is a schematic view of the connection relationship between the rotor center bearing and the connection plate of the sealing device of the rotary preheater.

FIG. 3 is a schematic view of the connection between the connection plate and the sealing plate of the sealing device of the rotary preheater.

FIG. 4 is an integrally disassembled view of a sealing device of a rotary preheater.

FIG. 5 is a front view of a connection plate of a sealing device of a rotary preheater.

FIG. 6 is a rear view of a connection plate of a sealing device of a rotary preheater.

FIG. 7 is a top view of a connection plate of a sealing device of a rotary preheater.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 7, for the utility model discloses a first embodiment, this embodiment provides a rotary preheater's sealing device, it has utilized and has set up connecting plate 101 between radial baffle 103 and closing plate 102, radial baffle 103 is connected with rotor 201, thereby rotor 201 can lead to mushroom-shaped deformation to lead to radial baffle 103 skew when being heated unevenly, add the displacement that connecting plate 101 can compensate radial baffle 103, thereby make closing plate 102 of connecting plate 101 upper end and sector plate 300 of closing plate 102 upper end can not produce the clearance, thereby play better sealed effect.

Specifically, the sealing device 100 includes a connecting plate 101, a sealing plate 102 disposed above the connecting plate 101, a radial partition 103 disposed on one side of the connecting plate 101, a fastening sliding assembly 104 disposed between the radial partition 103 and the connecting plate 101, and an embedded assembly 105 disposed at one end of the connecting plate 101.

The rotor 201 of the rotary preheater and the rotor center bearing 202 arranged in the middle of the rotor 201, the radial partitions 103 are arranged in an array along the rotor center bearing 202, the radial partitions 103 are arranged on the rotor 201, and a fixed connection method is adopted, for example: welding, or other fastening means.

The upper end of each radial partition 103 is provided with a connecting plate 101, the connecting plate 101 is arranged on one side of the radial partition 103, the radial partition 103 is tightly contacted with the connecting plate 101 and does not leak air and extends downwards, the end close to the rotor center bearing 202 is provided with an embedded assembly 105 which is embedded and connected with the rotor center bearing 202, and the connection mode can adopt other modes, such as plug-in connection, welding connection and the like.

Furthermore, a sealing plate 102 is disposed above each connecting plate 101, a protrusion 101a is disposed on the top of each connecting plate 102, and a groove 102a adapted to the protrusion 101a on the top of each connecting plate is disposed on the bottom of each sealing plate 102 for inserting and connecting the two, it should be noted that other fixed connection modes or detachable connection modes, such as welding, buckling, etc., may also be employed

Furthermore, a plurality of threaded holes are formed in the side surfaces of the two ends of the sealing plate 102, and the threaded holes penetrate through the projection 101a on the top of the connecting plate 102 and the groove of the sealing plate 102 to be fixedly connected through the threaded holes by screws 102 b. When in use, because the sector plate 300 is arranged above the sealing plate 102, when the rotor 201 rotates, the radial partition plate 103 rotates, the connecting plate 101 rotates, the sealing plate 102 is in sealing fit with the sector plate 300, and when the rotor 201 and the radial partition plate 103 fall down, the connecting plate 101 and the sealing plate 102 cannot fall down because of the arrangement of the connecting plate 101.

In summary, the sealing plate 101 in the prior art is directly connected to the radial partition plate 103, and when the rotor 201 is heated unevenly, the rotor 201 will bear the mushroom shape and drop, so the sealing plate 101 will also displace, and the gap between the sealing plate 101 and the sector plate 300 will be enlarged to form a "triangular air leakage zone". In the embodiment, the connecting plate 101 is additionally arranged between the radial partition plate 103 and the sealing plate 201, the connecting plate 101 is connected with the rotor central shaft 202, the rotor central shaft 202 cannot descend along with uneven heating of the rotor 201, and the sealing plate 102 is arranged above the connecting plate 101, so that when the rotor 201 is in a mushroom shape and descends, the connecting plate 101 and the sealing plate 102 cannot descend along with the descending, the problem that the gap between the sealing plate 102 and the sector plate 300 is enlarged is solved, and the economic loss and the potential safety hazard are reduced for enterprises.

Example 2

Referring to fig. 1 to 7, in order to implement the second embodiment of the present invention, it is different from the first embodiment: a fastening slide assembly 104 is also included. In the above embodiment, the sealing device of the rotary preheater comprises a sealing device 100, which comprises a connecting plate 101, a sealing plate 102 disposed above the connecting plate 101, a radial partition 103 disposed at one side of the connecting plate 101, a fastening sliding assembly 104 disposed between the radial partition 103 and the connecting plate 101, and an embedded assembly 105 disposed at one end of the connecting plate 101.

Further, a plurality of through self-adjusting ports M are provided at the ends of the connecting plate 101 and the radial partition plate 103 away from the rotor center bearing 202, the self-adjusting ports M are divided into an upper rectangular port and a lower semicircular port, the connecting plate 101 corresponds to the adjusting ports M of the radial partition plate 103, the number of the adjusting ports M is two, it should be noted that the number of the adjusting ports M may be multiple, and is not limited, and the shape of the adjusting ports M may be other shapes.

Further, the tightening slide assembly 104 is disposed within the self-adjusting opening M. The tightening slide assembly 104 includes a nut 103a disposed outside the radial spacer 103, a stud 103b coupled to the nut 103a, and a nut 101b coupled to the stud 103b and disposed outside the web 101.

Further, a nut 103a and a stud 103b are arranged on the outer side of the radial partition plate 103, a nut 101b is arranged on the outer side of the connecting plate 101, the nut 103a and the stud 103b penetrate through the connecting plate 101 to be matched and fastened with the adjusting opening M of the radial partition plate 103 and the nut 101b on the outer side of the connecting plate 101, however, the diameter of the adjusting opening M is larger than that of the stud 103b, the diameter of the adjusting opening M is a U-shaped opening, the screw 103b can move up and down in the U-shaped adjusting opening M due to the fact that the diameter of the U-shaped opening and the diameter of the adjusting opening M are larger than that of the stud 103b, and the diameter of the nut 103a and the diameter of the nut 101b are larger than that of the adjusting opening M. It should be noted that, a connection manner other than a bolt structure, such as a snap, may be adopted, which is not limited.

When the radial spacer plate 104 is used, the rotor 201 bears the mushroom shape and falls down under the condition that the rotor 201 is heated unevenly, the radial spacer plate 103 moves along with the rotor 201, the screw rod 103b has space activity in the u-shaped adjusting opening M, certain displacement compensation is realized, and when the radial spacer plate 103 falls down, the fastening sliding assembly 104 has enough displacement space.

In summary, because the fastening sliding assembly 104 is arranged between the connecting plate 101 and the radial partition plate 103, and the diameters of the nut 101b and the nut 103a are both larger than the adjusting opening M, the connecting plate 101 and the radial partition plate 103 are tightly connected without air leakage, and when the rotor 201 rotates all the time, a large vibration is generated, because of the existence of the fastening sliding assembly 104, a pulling force is generated to tightly connect the radial partition plate 103 and the connecting plate 101, so that air leakage is avoided, vibration can be reduced, noise can be reduced, and the service life of the fitting is longer.

Example 3

Referring to fig. 1 to 7, the present embodiment is a third embodiment, which is different from the first two embodiments: also included is an embedded component 105.

Specifically, the sealing device 100 includes a connecting plate 101, a sealing plate 102 disposed above the connecting plate 101, a radial partition 103 disposed at one side of the connecting plate 101, a fastening sliding assembly 104 disposed between the radial partition 103 and the connecting plate 101, and an embedded assembly 105 disposed at one end of the connecting plate 101.

Further, the connecting plate 101 comprises a projection 101a arranged at the top thereof, the sealing plate 102 comprises a groove 102a arranged at the bottom thereof, and the projection 101a is inserted into the groove 102 a; a threaded hole is arranged between the lug 101a and the groove 102a and is connected through a screw N.

Further, the radial partition plate 103 and the connecting plate 101a are both provided with a through self-adjusting port M which is divided into an upper rectangular port and a lower semicircular port; the fastening slide assembly 104 is disposed within the self-adjusting opening M.

Further, the tightening slide assembly 104 includes a nut 103a disposed outside the radial spacer 103, a stud 103b coupled to the nut 103a, and a nut 101b coupled to the stud 103b and disposed outside the connecting plate 101.

Further, the diameter of the self-adjusting opening M is larger than that of the stud 103b, and the diameters of the nut 103a and the nut 101b are larger than that of the self-adjusting opening M.

Further, a rotary preheater assembly 200 is included, which includes a rotor 201, and a rotor center bearing 202 disposed in the middle of the rotor 201.

Preferably, the embedded component 105 includes an embedded block 105a integrally formed with one end of the connecting plate 101, and two sets of convex through holes 105b symmetrically disposed on the embedded block 105 a; the rotor center bearing 202 is provided with a male block 202a fitted to the male through-hole 105 b.

It should be noted that, the embedded component 105 is composed of the connecting member 101 and the rotor center bearing 202, wherein one end of the connecting plate 101 near the rotor center shaft 202 is provided with an embedded block 105a integrally formed with the connecting plate 101, the embedded block 105a is symmetrical with the left and right two convex through holes, the rotor center bearing 202 is provided with a convex block 202a matching with the convex through hole, and the connecting plate 101 is embedded from above the rotor center bearing 202.

Further, the rotor center bearing 202 is provided with a threaded hole at a side and connected by a screw N.

It should be noted that, in order to ensure that the rotor center bearing 202 is more fixed to the connection plate 101, threaded holes are provided on the side surfaces of the rotor center bearing 202, that is, on both sides of the connection plate 101, and are connected by screws N.

Further, the rotary preheater assembly 200 further includes a sector plate 300 disposed at an upper end of the sealing plate 102 and in sealing engagement with the sealing plate 102.

Further, the sealing devices 100 are arranged in a plurality of groups and arrayed above the rotor 201.

It should be noted that, because the connection plate 101 and the rotor center bearing 202 are connected in an embedded manner, welding is more preferable than welding in the existing design, and the connection is not limited to the embedded manner, but may also be performed in other manners, such as a plug structure, a snap structure, and the like.

In use, because the connecting plate 101 is integrally formed with the embedded component 105, the embedded component 105 is disposed at an end near the rotor center bearing 202, and the embedded component 105 is inserted into the rotor center shaft 202 from above.

In conclusion, the sealing plate is detachably mounted in an embedded mode and is convenient to clean, the connecting plate 101 and the rotor center bearing 202 are further reinforced through screws, so that the connecting plate 101 and the rotor center bearing 202 are fixed, shaking is reduced, noise is reduced, and the sealing plate 102 and the connecting plate 101 are stable in rotation.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims (10)

1. A sealing device of a rotary preheater is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the sealing device (100) comprises a connecting plate (101), a sealing plate (102) arranged above the connecting plate (101), a radial partition plate (103) arranged on one side of the connecting plate (101), a fastening sliding assembly (104) arranged between the radial partition plate (103) and the connecting plate (101), and an embedded assembly (105) arranged at one end of the connecting plate (101).

2. A seal arrangement for a rotary preheater as recited in claim 1, wherein: the connecting plate (101) comprises a convex block (101a) arranged at the top of the connecting plate, the sealing plate (102) comprises a groove (102a) arranged at the bottom of the sealing plate, and the convex block (101a) is inserted into the groove (102 a); a threaded hole is formed between the lug (101a) and the groove (102a) and is connected through a screw (N).

3. A seal arrangement for a rotary preheater as claimed in claim 2, wherein: the radial partition plate (103) and the connecting plate (101) are both provided with a through self-adjusting port (M), and the self-adjusting port (M) is divided into an upper rectangular port and a lower semicircular port; the fastening slide assembly (104) is disposed within the self-adjusting opening (M).

4. A seal arrangement for a rotary preheater as claimed in claim 3, wherein: the fastening sliding assembly (104) comprises a nut (103a) arranged on the outer side of the radial partition plate (103), a stud (103b) connected with the nut (103a), and a nut (101b) connected with the stud (103b) and arranged on the outer side of the connecting plate (101).

5. A seal arrangement for a rotary preheater according to claim 4, wherein: the diameter of the self-adjusting opening (M) is larger than that of the stud (103b), and the diameters of the nut (103a) and the nut (101b) are larger than that of the self-adjusting opening (M).

6. A seal arrangement for a rotary preheater according to claim 5, wherein: also included is a rotary preheater assembly (200) comprising a rotor (201), and a rotor center bearing (202) disposed intermediate the rotor (201).

7. The seal arrangement for a rotary preheater as set forth in claim 6, wherein: the embedded component (105) comprises an embedded block (105a) integrally formed with one end of the connecting plate (101), and two groups of convex through holes (105b) symmetrically arranged on the embedded block (105 a); the rotor center bearing (202) is provided with a convex block (202a) which is matched with the convex through hole (105 b).

8. A seal arrangement for a rotary preheater according to claim 7, wherein: the side edge of the rotor center bearing (202) is provided with a threaded hole and is connected through a screw (N).

9. A seal arrangement for a rotary preheater according to claim 8, wherein: the rotary preheater assembly (200) further comprises a sector plate (300) arranged at the upper end of the sealing plate (102) and in sealing fit with the sealing plate (102).

10. A seal arrangement for a rotary preheater as claimed in any one of claims 6 to 9, wherein: the sealing devices (100) are arranged in a plurality of groups and are arranged above the rotor (201) in an array.

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