Improved air pre-heater

Abstract

The utility model relates to the technical field of air pre-heaters, in particular to an improved air pre-heater. Comprising an air pre-heater body, and a cover plate is arranged at an opening of the air pre-heater body; the connecting rod is arranged on the outer side wall of the air pre-heater body, and one end of the connecting rod is connected with a cover plate; and the lifting assembly is arranged on the air pre-heater body, the other end of the connecting rod is arranged on the lifting assembly, and the lifting assembly is suitable for changing the relative position of the cover plate and the opening. The connecting rod is connected between the lifting assembly and the cover plate, when the cover plate is pulled by the lifting assembly to leave the opening position, a worker can clean ash in the air pre-heater body through the opening, and the cover plate can block the opening under the traction of the lifting assembly. The lifting assembly pulls the connecting rod to open the cover plate, manual opening is not needed, and the risk that workers are scalded is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheaters, in particular to an improved air preheater. Background Art

[0002] As a boiler energy-saving device, it is very important to keep the air preheater in normal working condition. During its use, dust in the flue gas will often be adsorbed on the outer wall of the exchanger pipe, affecting the heat transfer effect, so it is necessary to frequently open the air preheater cover for cleaning.

[0003] According to the patents published on the China Patent Network, the patent name is: An air preheater structure, and the patent number is: 201920998983.0. The utility model belongs to the technical field of fluidized bed boilers, specifically an air preheater structure, which can extend the continuous operation time of the boiler, and includes an upper air preheater, an intermediate air preheater, and a lower air preheater. The upper air preheater, the intermediate air preheater, and the lower air preheater are all arranged horizontally in series. The transverse pitch of the upper air preheater is the same as the transverse pitch of the intermediate air preheater, and the transverse pitch of the lower air preheater is greater than the transverse pitch of the intermediate air preheater. The longitudinal pitches of the upper air preheater, the intermediate air preheater, and the lower air preheater are the same. Assuming the outer diameter of the air preheater tube is d, the The upper air preheater has a transverse pitch S1≥d+20 and a longitudinal pitch S2≥d+15, the intermediate air preheater has a transverse pitch S3≥d+20 and a longitudinal pitch S4≥d+15, the lower air preheater has a transverse pitch S3≥d+35 and a longitudinal pitch S4≥d+15, the upper air preheater, the intermediate air preheater and the lower air preheater are respectively composed of two rows and three columns of six air preheater tube groups, each of which has no air preheater tubes at the four corners of the air preheater tube group, and soot blowers are respectively arranged above the upper air preheater, the intermediate air preheater and the lower air preheater. After adopting the structure of the utility model, the lower air preheater adopts a larger transverse pitch, which can effectively reduce dust accumulation and blockage on the heating surface and extend the continuous operation cycle of the boiler.

[0004] The cover of the air preheater mentioned above is opened manually by workers, which is not only inefficient but also easy to burn the workers, affecting the overall safety. Utility Model Content

[0005] Therefore, the utility model aims to overcome the technical problems in the prior art, thereby providing an improved air preheater capable of automatically opening a cover plate.

[0006] The utility model provides an improved air preheater, comprising:

[0007] An air preheater body, wherein a cover plate is provided at the opening of the air preheater body;

[0008] A connecting rod is arranged on the outer side wall of the air preheater body, and one end of the connecting rod is connected to the cover plate;

[0009] The lifting assembly is arranged on the air preheater body, the other end of the connecting rod is arranged on the lifting assembly, and the lifting assembly is suitable for changing the relative position of the cover plate and the opening.

[0010] Furthermore, the lifting assembly includes:

[0011] A shell, arranged on the outer side wall of the air preheater body, and an inner cavity is arranged inside the shell;

[0012] A motor is arranged in the housing;

[0013] A transmission assembly is arranged in the housing, and the transmission assembly is connected to the motor and the connecting rod respectively;

[0014] The transmission assembly is suitable for causing the connecting rod to move up and down under the drive of the motor.

[0015] Furthermore, the transmission assembly includes:

[0016] A worm is arranged in the housing, one end of the worm is connected to the motor, and the other end of the worm is rotatably connected to the inner wall of the housing;

[0017] A rotating rod is arranged in the housing, and two ends of the rotating rod are respectively rotatably connected to the inner side wall of the housing;

[0018] A worm wheel is arranged on the outer surface of the rotating rod, and the worm wheel is meshed with the worm;

[0019] A gear ring, arranged on the outer surface of the rotating rod and located on one side of the worm gear;

[0020] A tooth plate is arranged in the housing, the tooth plate is meshed with the gear ring, and the side wall of the tooth plate is connected to the connecting rod;

[0021] A sliding hole is arranged on the side wall of the shell, the connecting rod passes through the sliding hole, and the extending direction of the sliding hole is parallel to the moving direction of the tooth plate.

[0022] Furthermore, the transmission assembly also includes:

[0023] A slide groove is arranged on the inner side wall of the housing, and the extending direction of the slide groove is parallel to the moving direction of the tooth plate;

[0024] A slide plate is inserted in the slide groove, and the slide plate is connected to the end side of the tooth plate.

[0025] Furthermore, the transmission assembly also includes:

[0026] The bellows is connected between the slide plate and the side wall of the shell.

[0027] Furthermore, the transmission assembly also includes:

[0028] The positioning seat is arranged on the inner side wall of the shell, and the motor is arranged on the positioning seat.

[0029] Furthermore, the transmission assembly also includes:

[0030] A limit block is arranged on the inner side wall of the shell, and the worm screw passes through the limit block.

[0031] Furthermore, the worm and the rotating rod are perpendicular to each other.

[0032] Furthermore, the rotating rod and the toothed plate are perpendicular to each other.

[0033] Furthermore, the bellows is arranged on a side wall of the slide plate away from the rotating rod.

[0034] The technical solution of this utility model has the following advantages:

[0035] The utility model provides an improved air preheater, which is provided with a connecting rod and a lifting assembly. The connecting rod is connected between the lifting assembly and the cover plate. When the cover plate leaves the opening position under the traction of the lifting assembly, the staff can clean the soot in the air preheater body through the opening, and the cover plate can also block the opening under the traction of the lifting assembly. The present application is to open the cover plate by pulling the connecting rod by the lifting assembly, and does not need to be opened manually, thereby avoiding the risk of scalding to the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a schematic diagram of the structure of the utility model;

[0038] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0039] Description of reference numerals;

[0040] 1. Air preheater body; 2. Cover plate; 3. Connecting rod; 4. Shell; 5. Motor; 6. Worm; 7. Rotating rod; 8. Worm wheel; 9. Ring gear; 10. Tooth plate; 11. Sliding hole; 12. Sliding groove; 13. Slide plate; 14. Bellows; 15. Positioning seat; 16. Limit block. DETAILED DESCRIPTION

[0041] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example

[0046] like Figure 1 to Figure 2 A specific implementation of an improved air preheater is shown, and the improved air preheater comprises:

[0047] The air preheater body 1 is provided with a cover plate 2 at the opening of the air preheater body 1; generally speaking, an opening is provided at the bottom end of the air preheater body 1 for cleaning the soot in the air preheater body 1.

[0048] The connecting rod 3 is arranged on the outer side wall of the air preheater body 1, and one end of the connecting rod 3 is connected to the cover plate 2; the connecting rod 3 is attached to the air preheater body 1, and the connecting rod 3 is connected between the lifting assembly and the cover plate 2. If the lifting assembly and the cover plate 2 are located on the same side of the air preheater body 1, the connecting rod 3 can be a straight rod, and when the lifting assembly and the cover plate 2 are located on two adjacent sides of the air preheater body 1, the connecting rod 3 can be an L-shaped rod. Of course, this embodiment is not limited to this.

[0049] The lifting assembly is arranged on the air preheater body 1, and the other end of the connecting rod 3 is arranged on the lifting assembly. The lifting assembly is suitable for changing the relative position of the cover plate 2 and the opening. When the cover plate 2 leaves the opening position under the traction of the lifting assembly, the staff can clean the soot in the air preheater body 1 through the opening, and the cover plate 2 can also block the opening under the traction of the lifting assembly.

[0050] Furthermore, the lifting assembly includes:

[0051] A shell 4 is arranged on the outer wall of the air preheater body 1, and an inner cavity is arranged inside the shell 4;

[0052] The motor 5 is disposed in the housing 4; the motor 5 may be a rotary motor 5, and the motor 5 provides power for the lifting and lowering of the cover plate 2. It should be noted that the speed and rotation direction of the motor 5 can be controlled by a controller, and the controller is electrically connected to the motor 5.

[0053] The transmission assembly is arranged in the housing 4 , and the transmission assembly is connected to the motor 5 and the connecting rod 3 respectively; the transmission assembly is suitable for converting the torque of the motor 5 into the lifting and lowering of the connecting rod 3 .

[0054] The transmission assembly is suitable for causing the connecting rod 3 to move up and down under the drive of the motor 5 .

[0055] Furthermore, the transmission assembly includes:

[0056] A worm 6 is disposed in the housing 4, one end of the worm 6 is connected to the motor 5, and the other end of the worm 6 is rotatably connected to the inner wall of the housing 4;

[0057] A rotating rod 7 is disposed in the housing 4, and two ends of the rotating rod 7 are respectively rotatably connected to the inner side wall of the housing 4;

[0058] The worm wheel 8 is arranged on the outer surface of the rotating rod 7, and the worm wheel 8 is meshed with the worm 6; the worm 6 is rotated under the drive of the motor 5, and the rotating rod 7 is provided with a worm wheel 8 meshed with the worm 6, so the rotating rod 7 also rotates.

[0059] a gear ring 9, arranged on the outer surface of the rotating rod 7 and located on one side of the worm gear 8;

[0060] The tooth plate 10 is arranged in the housing 4, and the tooth plate 10 is meshed with the gear ring 9. The side wall of the tooth plate 10 is connected to the connecting rod 3; the tooth plate 10 is provided with teeth adapted to the gear ring 9, and the tooth plate 10 and the gear ring 9 are meshed. The gear ring 9 rotates under the drive of the rotating rod 7, so the gear ring 9 can drive the tooth plate 10 to move up and down.

[0061] The sliding hole 11 is provided on the side wall of the housing 4, and the connecting rod 3 passes through the sliding hole 11. The extending direction of the sliding hole 11 is parallel to the moving direction of the tooth plate 10. The connecting rod 3 can move up and down in the sliding hole 11, and the connecting rod 3 should not interfere with the sliding hole 11 when moving.

[0062] Furthermore, the transmission assembly also includes:

[0063] A slide groove 12 is provided on the inner side wall of the housing 4, and the extending direction of the slide groove 12 is parallel to the moving direction of the tooth plate 10;

[0064] The slide plate 13 is inserted into the slide groove 12, and the slide plate 13 is connected to the end side of the tooth plate 10. The slide groove 12 and the slide plate 13 can guide the movement of the tooth plate 10.

[0065] Furthermore, the transmission assembly also includes:

[0066] The bellows 14 is connected and arranged between the slide plate 13 and the side wall of the housing 4. The bellows 14 can be extended and retracted to buffer the movement of the slide plate 13 and prevent the slide plate 13 from directly colliding with the inner side wall of the housing 4.

[0067] Furthermore, the transmission assembly also includes:

[0068] The positioning seat 15 is arranged on the inner side wall of the housing 4 , and the motor 5 is arranged on the positioning seat 15 . The motor 5 can be connected to the housing 4 through the positioning seat 15 .

[0069] Furthermore, the transmission assembly also includes:

[0070] The limiting block 16 is arranged on the inner side wall of the housing 4, and the worm 6 passes through the limiting block 16. The limiting block 16 can limit the worm 6 to prevent the worm 6 from shaking.

[0071] Furthermore, the worm 6 and the rotating rod 7 are perpendicular to each other.

[0072] Furthermore, the rotating rod 7 and the tooth plate 10 are perpendicular to each other.

[0073] Furthermore, the bellows 14 is arranged on the side wall of the slide plate 13 away from the rotating rod 7, so as to prevent the slide plate 13 from directly colliding with the inner side wall of the housing 4.

[0074] When in use, the motor 5 can rotate forward and reverse, the worm 6 rotates under the drive of the motor 5, and the rotating rod 7 is provided with a worm wheel 8 meshing with the worm 6, so the rotating rod 7 also rotates. The tooth plate 10 is provided with teeth adapted to the gear ring 9, the tooth plate 10 and the gear ring 9 mesh, and the gear ring 9 rotates under the drive of the rotating rod 7, so the gear ring 9 can drive the tooth plate 10 to move up and down, and the connecting rod 3 can move up and down in the sliding hole 11. When the cover plate 2 leaves the opening position under the traction of the tooth plate 10, the staff can clean the soot in the air preheater body 1 through the opening, and the cover plate 2 can also seal the opening under the traction of the tooth plate 10.

[0075] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. An improved air preheater, characterized in that: include: An air preheater body (1), wherein a cover plate (2) is provided at an opening of the air preheater body (1); A connecting rod (3) is arranged on the outer side wall of the air preheater body (1), and one end of the connecting rod (3) is connected to the cover plate (2); The lifting assembly is arranged on the air preheater body (1), and the other end of the connecting rod (3) is arranged on the lifting assembly. The lifting assembly is suitable for changing the relative position of the cover plate (2) and the opening.

2. The improved air preheater according to claim 1, characterized in that: The lifting assembly comprises: A shell (4) is arranged on the outer wall of the air preheater body (1), and an inner cavity is arranged inside the shell (4); A motor (5) is arranged in the housing (4); A transmission assembly is arranged in the housing (4), and the transmission assembly is respectively connected to the motor (5) and the connecting rod (3); The transmission assembly is suitable for causing the connecting rod (3) to move up and down under the drive of the motor (5).

3. The improved air preheater according to claim 2, characterized in that: The transmission assembly comprises: A worm (6) is arranged in the housing (4), one end of the worm (6) is connected to the motor (5), and the other end of the worm (6) is rotatably connected to the inner wall of the housing (4); A rotating rod (7) is arranged in the housing (4), and two ends of the rotating rod (7) are respectively rotatably connected to the inner side wall of the housing (4); A worm wheel (8) is arranged on the outer surface of the rotating rod (7), and the worm wheel (8) is meshed with the worm (6); A gear ring (9) is arranged on the outer surface of the rotating rod (7) and is located on one side of the worm gear (8); A tooth plate (10) is arranged in the housing (4), the tooth plate (10) is meshed with the gear ring (9), and the side wall of the tooth plate (10) is connected to the connecting rod (3); A sliding hole (11) is arranged on the side wall of the housing (4); the connecting rod (3) passes through the sliding hole (11); and the extending direction of the sliding hole (11) is parallel to the moving direction of the tooth plate (10).

4. The improved air preheater according to claim 3 is characterized in that: The transmission assembly also includes: A slide groove (12) is arranged on the inner side wall of the housing (4), and the extension direction of the slide groove (12) is parallel to the movement direction of the tooth plate (10); A slide plate (13) is inserted into the slide groove (12), and the slide plate (13) is connected to the end side of the tooth plate (10).

5. The improved air preheater according to claim 4, characterized in that: The transmission assembly also includes: A bellows (14) is connected and arranged between the slide plate (13) and the side wall of the housing (4).

6. The improved air preheater according to claim 2, characterized in that: The transmission assembly also includes: The positioning seat (15) is arranged on the inner side wall of the housing (4), and the motor (5) is arranged on the positioning seat (15).

7. The improved air preheater according to claim 3, characterized in that: The transmission assembly also includes: A limit block (16) is arranged on the inner side wall of the housing (4), and the worm (6) passes through the limit block (16).

8. The improved air preheater according to claim 3, characterized in that: The worm (6) and the rotating rod (7) are perpendicular to each other.

9. The improved air preheater according to claim 3, characterized in that: The rotating rod (7) and the toothed plate (10) are perpendicular to each other.

10. The improved air preheater according to claim 5, characterized in that: The bellows (14) is arranged on a side wall of the slide plate (13) away from the rotating rod (7).

Images