DE202023105513U1 - Anti-blocking device for air preheaters - Google Patents

Abstract

Anti-blocking device for air preheaters, characterized in that it has a housing (1), a matrix smoke pipe (2) arranged in the housing (1), a first cleaning mechanism (3) arranged in the housing (1) for cleaning the outer wall of the smoke pipe (2) , a second cleaning mechanism (4) arranged on the housing (1) and on the first cleaning mechanism (3) for cleaning the inner wall and the outer wall of the smoke pipe (2) and a drive mechanism (5) which is intended to drive the first cleaning mechanism (3 ) to move up and down includes.

Description

TECHNICAL FIELD

The utility model relates to the technical area of air preheaters, in particular to an anti-blocking device for air preheaters.

STATE OF THE ART

Air preheater is a heat exchange device used in large power plant boilers. The flue gas in the exhaust gas of the combustion boiler preheats the air entering the boiler to a certain temperature through internal heat dissipation fins, thereby achieving the purpose of heating the air. Air preheaters are generally divided into three types: a plate type, a rotary type and a tube type. Among them, the tube air preheater is popular in the market due to its simple structure, convenient manufacturing, installation and maintenance, and low price.

The cross-sectional area of the flue gas passage of the air preheater is small and the resistance is high, so the flue gas pipe is blocked with ash and slag. Once the pipeline is blocked, it not only requires a large amount of maintenance but is also susceptible to corrosion. Therefore, it is necessary to clean the pipeline regularly. The publication CN2354023Y discloses an anti-lock device installed in the boiler air preheater. A floating suspension, suspended by a floating tension spring, is added to the upper part of the air preheater, and a dust removal spring is raised within the slightly clogged flue pipe, with a heavy hammer hanging from the lower end. By pulling the rope to drive the floating suspension, the ash separator spring moves up and down to continuously scrape the coal accumulated on the inner wall of the smoke pipe and achieve the goal of dust removal and blockage inside the smoke pipe. The patent with the publication number CN214791245U discloses an anti-lock tube box air preheater comprising a box body and a heat exchange member. The opposite side walls of the box body are each connected to the air flow channel. The heat exchange part includes a plurality of heat exchanger tubes, and a matrix of a plurality of heat exchanger tubes is arranged within the box.

The technologies mentioned above are usually only able to clean the dust inside the flue gas duct, but the air duct is neglected. Blocking the air duct often leads to low heat exchange efficiency of air and corrosion of the outer wall of the pipeline. Therefore, it is necessary to design an anti-blocking device for air preheater, which can prevent both flue gas duct blockage and air duct blockage.

DISCLOSURE OF USAGE PATTERN

In order to overcome the shortcomings in the above-mentioned existing technologies, the utility model includes an anti-blocking device for air preheater, which can prevent both flue pipe blockage and air duct blockage.

The technical implementation scheme of this utility model is: an anti-blocking device for air preheaters, comprising a housing, a matrix smoke pipe arranged in the housing, a first cleaning mechanism arranged in the housing for cleaning the outer wall of the smoke pipe, a second cleaning mechanism for cleaning arranged on the housing and on the first cleaning mechanism the inner wall and the outer wall of the smoke pipe and a drive mechanism intended to move the first cleaning mechanism up and down.

It is further more advantageous that the first cleaning mechanism includes a rectangular frame, a plurality of connecting rods arranged within the rectangular frame and parallel to an edge of the rectangular frame, a plurality of cleaning brushes arranged at an equal distance along a length direction of the connecting rod, and a push rod disposed on the outside of the rectangular frame and in slidable fit with the housing; and
that a distance between two adjacent connecting rods is equal; and
that the distance between the two adjacent connecting rods corresponds to a distance between two adjacent cleaning brushes; and
that each cleaning brush is located between four adjacent smoke pipes.

It is further more advantageous that the cleaning brush comprises a cross bar, an arcuate plate each attached to four ends of the cross bar, and a brush bristle each attached to the inside of the arcuate plate; and
that one end of the cross bar is connected to the outside of the arcuate plate.

It is further advantageous that a straight sliding groove is arranged on the side wall of the housing, which fits the push rod.

It is further more advantageous that the second cleaning mechanism comprises a vibration source and a vibration transmission part; and
that the vibration source includes a first projection 6 disposed in the straight sliding groove and a second projection disposed on one side of the push rod; and
that frictional contact occurs between the first projection and the second projection; and
in that the vibration transmission part comprises a fastening column arranged on the inside of the arcuate plate and formed with a cavity, and a contact ball and a spring are arranged inside the cavity, and the two ends of the spring are respectively against the inner wall of the cavity and the contact ball support, and
that a frictional contact occurs between the contact ball and the outer wall of the smoke pipe.

It is further more advantageous that the drive mechanism has a drive motor, which is located on the lower side of the housing and is arranged outside the housing, a spindle, which is connected to a drive shaft of the drive motor, a holder for supporting the spindle, which is on the upper side of the housing and outside of the housing, and a cross plate arranged on the spindle; and
that the cross plate is provided with a threaded hole which cooperates with the spindle; and
that the cross plate is connected to the push rod.

It is further more advantageous that the connection between the cross plate and the push rod takes place as follows: that a rectangular groove is provided on the cross plate, and an end of the push rod that is far away from the rectangular frame is embedded in the rectangular groove, and a buffer spring is provided in the rectangular groove is, which is connected at both ends to a side wall of the rectangular groove and the push rod.

The positive effects of this utility model:

The utility model provides dust removal and clogging prevention treatment for the flue gas duct and the air duct, respectively, when providing the first cleaning mechanism and the second cleaning mechanism. Through the first cleaning mechanism, cleaning of the outer wall of the smoke pipe can be achieved, thereby preventing contaminants in the air from adhering to the outer wall of the smoke pipe and forming blockages.

The utility model drives the first cleaning mechanism to move up and down through the cooperation of the drive motor and the lockers. When the first cleaning mechanism moves, the vibration generated by the friction between the first projection and the second projection is transmitted to the contact ball, and the vibration is further transmitted by the friction between the contact ball and the outer wall of the smoke pipe. The dust on the inner wall and the outer wall of the smoke pipe is thus removed by vibration, thereby cleaning the walls of the smoke pipe and making it possible to avoid blockage and rusting of the pipe.

BRIEF DESCRIPTION OF THE DRAWINGS

• 1 is a schematic perspective representation of the utility model;
• 2 is a schematic representation of the smoke and air flow directions of the utility model;
• 3 is a schematic perspective view of a first cleaning mechanism and a cross plate of the utility model;
• 4 is a schematic perspective representation of a cleaning brush of this utility model;
• 5 is a schematic perspective view of a straight sliding groove, a push rod, a first projection and a second projection of the utility model;
• 6 is a partial sectional view of a mounting column of the utility model;
• 7 is a schematic representation of a cross plate, a rectangular groove, a buffer spring and a push rod of the utility model in the assembled state.

The meaning of the reference numbers in drawings: 1. Housing, 11. Straight sliding groove, 2. Smoke pipe, 3. First cleaning mechanism, 31. Rectangular frame, 32. Connecting rod, 33. Cleaning brush, 33-1. Crossbar, 33-2. Arched plate, 33-3. Brush bristle, 34. Push rod, 4. Second cleaning mechanism, 41. Mounting column, 42. Contact ball, 43. Spring, 5. Drive mechanism, 51. Drive motor, 52. Spindle, 53. Bracket, 54. Cross plate 55. Threaded hole, 56. Rectangular groove, 57. Buffer spring, 6. First lead, 61. Second lead.

EMBODIMENTS OF THE UTILITY MODEL

The technical solutions in the embodiments of the utility model are clearly and completely described below in conjunction with the attached drawings in the embodiments of the utility model, and it is obvious that the described embodiments represent only a part of the embodiments of the utility model and not all of the embodiments. Based on the embodiments of the utility model, all other embodiments that a person skilled in the art can produce without any creative work fall within the scope of protection of the utility model.

Example 1

An anti-blocking device for air preheaters, as in 1-7 shown comprises: a housing 1, which is a rectangular frame, as in 1 shown, wherein a top, a bottom, a front and a rear side of the housing are each provided with an opening, and wherein a smoke pipe 2 is arranged vertically and in a matrix in the housing, and wherein the smoke pipe 2 is connected to one another by a pipe clamp and is removable connected to the housing 1.

A first cleaning mechanism 3, wherein the first cleaning mechanism 3 is in slidable fit with the housing 1, and wherein the first cleaning mechanism 3 is driven by a drive mechanism 5 which drives the first cleaning mechanism 3 to move the first cleaning mechanism 3 along the housing 1 and from moving, and wherein the first cleaning mechanism 3 is intended to clean the dust on the outer wall of the smoke pipe 2, and wherein the first cleaning mechanism 3 can perform a continuous linear reciprocating movement or an intermittent reciprocating movement.

A second cleaning mechanism 4, wherein the second cleaning mechanism 4 is arranged on the housing 1 and the first cleaning mechanism 3, and wherein the second cleaning mechanism 4 is in contact with the smoke pipe 2, and the vibration from the second cleaning mechanism 4 caused by the operation of the first cleaning mechanism 3 is generated, shaking off the dust on the smoke pipe 2.

Specifically, the first cleaning mechanism 3 includes a rectangular frame 31, and a plurality of connecting rods 32 disposed within the rectangular frame 31 and parallel to an edge of the rectangular frame 31. Specifically, the connecting rod 32 is parallel to the left and right edges of the rectangular frame 31, and the distance between the two adjacent connecting rods 32 is equal. A plurality of cleaning brushes 33 are arranged at an equal distance along a length direction of the connecting rod 32 (ie, the front-rear direction). 1 ) is arranged, and on the outside of the rectangular frame 31 a push rod 34 is arranged, which is in a slidable fit with the housing 1. In particular, a straight sliding groove 11, which fits the push rod 34, is arranged on the side wall of the housing 1. Two straight sliding grooves 11 are arranged on the left and right side walls of the housing 1, and two push rods 34 are arranged on the left and right sides of the rectangular frame 31, which are in a slidable fit with the straight sliding groove 11.

It should be noted that the distance between the two adjacent connecting rods 32 corresponds to the distance between the two adjacent cleaning brushes 33.

Each cleaning brush 33 is located between four adjacent smoke pipes 2. In one embodiment, the number of smoke pipes 2 is 6 x 6, and the number of connecting rods 32 is 5, and the number of cleaning brushes 33 on each connecting rod 32 is 5.

In particular, the cleaning brush 33 includes a cross bar 33-1 and an arcuate plate 33-2 is attached to each of four ends of the cross bar 33-1, and a brush bristle 33-3 is attached to the inside of each arcuate plate 33-2.

One end of the cross bar 33-1 is connected to the outside of the arcuate plate 33-2, and the arcuate plate 33-2 is bent toward the direction of the smoke pipe 2. The bristle 33-3 comes into contact with the outer wall of the smoke pipe 2 and moves up and down along the outer wall of the smoke pipe 2, thereby removing impurities adhered to the outer wall of the smoke pipe 2.

In particular, the drive mechanism 5 includes a drive motor 51, which is located on the lower right side of the housing 1 and is arranged outside the housing 1. An upper end of the drive shaft of the drive motor 51 is fixedly connected to a spindle 52, and a bracket 53 is fixedly attached to the upper right side of the housing 1 and disposed outside the housing. The bracket 53 is rotatably connected to the spindle 52, and a cross plate 54 is arranged on the spindle 52. In particular is that Cross plate 54 is provided with a threaded hole 55 which cooperates with the spindle 52. The two ends of the cross plate 54 are connected to the push rod 34.

The drive motor 51 rotates clockwise or vice versa, and the spindle 52 connected to it also rotates synchronously, driving the cross plate 54 and the push rod 34 to slide up and down along the straight sliding groove 11. Ultimately, the first cleaning mechanism 3 is driven to swing up and down, thereby achieving the function of cleaning the outer wall of the smoke pipe 2.

Example 2

• Wie in 4-6 dargestellt, umfasst der zweite Reinigungsmechanismus 4 eine Schwingungsquelle und einen Schwingungsübertragungteil. Die Schwingungsquelle umfasst einen ersten Vorsprung 6, der in der geraden Gleitnut 11 angeordnet ist, und einen zweiten Vorsprung 61, der auf einer Seite der Schiebestange 34 angeordnet ist. Ein Reibungskontakt entsteht zwischen dem ersten Vorsprung 6 und dem zweiten Vorsprung 61.

The difference between this embodiment and Embodiment 1 is that:

• As in 4-6 shown, the second cleaning mechanism 4 includes a vibration source and a vibration transmission part. The vibration source includes a first projection 6 disposed in the straight sliding groove 11 and a second projection 61 disposed on one side of the push rod 34. Frictional contact occurs between the first projection 6 and the second projection 61.

The vibration transmitting part includes a fixing column 41 disposed on the inside of the arcuate plate 33-2 and provided with a cavity, and inside the cavity, a contact ball 42 and a spring 43 are disposed. The two ends of the spring 43 are each supported against the inner wall of the cavity and the contact ball 42.

In particular, a series of first projections 6 are arranged on the side wall of each straight sliding groove 11. Accordingly, the second projection 61 is arranged on the push rod 34. When the push rod 34 moves along the straight sliding groove 11, a vibration is generated between the first projection 6 and the second projection 61, and the vibration is finally transmitted to the fixing column 41 and the via the rectangular frame, the connecting rod, the cross rod and the arch plate Transfer contact ball 42. The contact ball 42 is in contact with the outer wall of the smoke pipe 2 and causes the pipe to vibrate, and at the same time the other side of the contact ball 42 contacts the spring 43, which has a buffering effect and causes a restoring movement.

Example 3

This embodiment is basically the same as embodiment 1, but with the following difference:

As in 7 shown, the connection between the cross plate 54 and the push rod 34 is as follows: a rectangular groove 56 is arranged on the cross plate 54, an end of the push rod 34 far away from the rectangular frame 31 is embedded in the rectangular groove 56, and the rectangular groove 56 is also a buffer spring 57, which is connected at both ends to a side wall of the rectangular groove 56 and the push rod 34.

The frictional contact between the first projection 6 and the second projection 61 can cause wobbling. In order to prevent the push rod 34 from jamming when sliding along the straight sliding groove 11, it is provided with a buffer distance through cooperation with the buffer spring 57.

In this utility model, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood or implied as an indication of relative meaning. The term “multiple” refers to two or more unless otherwise specified. The terms “installation”, “connection”, “pairing”, “fixation” and other terms should be understood in the broadest sense. For example, “connection” can be a fixed connection, a detachable connection or an integrated connection. The “connection” can be direct or indirect connection via intermediate media. For ordinary technical personnel in this field, the specific meanings of the above terms in this utility model can be understood based on certain circumstances.

The above embodiments are intended only to illustrate the technical concept and features of the present utility model, and their purpose is to enable those familiar with this technology to understand and implement the content of the present utility model accordingly, without affecting the scope of the present Restrict utility models. Any corresponding changes or modifications made based on the spirit of this utility model should be covered by the protection of this utility model. Currently, the technical solution of this utility model has undergone pilot testing, i.e. small-scale testing of the product before large-scale production. After the pilot test was completed, a small-scale user usage survey was conducted, and the survey results showed high user satisfaction. Now we start preparing for the formal production of the product for industrialization (including research on intellectual property risk warning).

QUOTES INCLUDED IN THE DESCRIPTION

This list of documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• CN 2354023 Y [0003]
• CN 214791245 U [0003]

Claims (7)

Anti-blocking device for air preheaters, characterized in that it has a housing (1), a matrix smoke pipe (2) arranged in the housing (1), a first cleaning mechanism (3) arranged in the housing (1) for cleaning the outer wall of the smoke pipe (2) , a second cleaning mechanism (4) arranged on the housing (1) and on the first cleaning mechanism (3) for cleaning the inner wall and the outer wall of the smoke pipe (2) and a drive mechanism (5) which is intended to drive the first cleaning mechanism (3 ) to move up and down includes. Anti-blocking device for air preheater according to Claim 1 , characterized in that the first cleaning mechanism (3) comprises a rectangular frame (31), a plurality of connecting rods (32) arranged within the rectangular frame (31) and parallel to an edge of the rectangular frame (31), a plurality of cleaning brushes (33) arranged at an equal distance along a length direction of the connecting rod (32), and a push rod (34) disposed on the outside of the rectangular frame (31) and in slidable fit with the housing (1). ; and that a distance between two adjacent connecting rods (32) is equal; and that the distance between the two adjacent connecting rods (32) corresponds to a distance between two adjacent cleaning brushes (33); and that each cleaning brush (33) is located between four adjacent smoke pipes (2). Anti-blocking device for air preheater according to Claim 2 , characterized in that the cleaning brush (33) comprises a cross bar (33-1), an arcuate plate (33-2) attached to four ends of the cross bar (33-1), and a brush bristle (33-3) , each attached to the inside of the arcuate plate (33-2); and that one end of the cross bar (33-1) is connected to the outside of the arcuate plate (33-2). Anti-blocking device for air preheater according to Claim 3 , characterized in that a straight sliding groove (11) is arranged on the side wall of the housing (1), which fits the push rod (34). Anti-blocking device for air preheater according to Claim 4 , characterized in that the second cleaning mechanism (4) comprises a vibration source and a vibration transmission part; and in that the vibration source includes a first projection (6) disposed in the straight sliding groove (11) and a second projection (61) disposed on one side of the push rod (34); and that frictional contact occurs between the first projection (6) and the second projection (61); and that the vibration transmission part comprises a fixing column (41) arranged on the inside of the arcuate plate (33-2) and formed with a cavity, and a contact ball (42) and a spring (43) are arranged inside the cavity, and the two ends of the spring (43) are each supported against the inner wall of the cavity and the contact ball (42). Anti-blocking device for air preheater according to Claim 5 , characterized in that the drive mechanism (5) includes a drive motor (51), which is located on the lower side of the housing (1) and is arranged outside the housing (1), a spindle (52) which is connected to a drive shaft of the drive motor (51), a bracket (53) for supporting the spindle (52), which is arranged on the upper side of the housing (1) and outside the housing, and a cross plate (54) which is attached to the spindle (52) is arranged, comprises; and that the cross plate (54) is provided with a threaded hole (55) which cooperates with the spindle (52); and that the cross plate (54) is connected to the push rod (34). Anti-blocking device for air preheater according to Claim 6 , characterized in that the connection between the cross plate (54) and the push rod (34) is as follows: that a rectangular groove (56) is provided on the cross plate (54), and an end far away from the rectangular frame (31). Push rod (34) is embedded in the rectangular groove (56), and a buffer spring (57) is provided in the rectangular groove (56), which is connected at both ends to a side wall of the rectangular groove (56) and the push rod (34). .

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