A suspended air preheater

Abstract

This utility model discloses a suspended air preheater, belonging to the technical field of air preheater technology. The suspended air preheater includes a body, ventilation ducts installed at the top and bottom of the body, a first air inlet and a second air inlet located on both sides of the ventilation ducts, a rotating shaft installed on the ventilation ducts, and a rotor installed on the inner side of the body and rotatably connected to the rotating shaft. The body has mounting grooves at the top and bottom corresponding to the rotor. A sealing assembly is detachably connected to the inner side of each mounting groove. This assembly utilizes an elastic metal sealing body located inside a metal frame, which is subjected to an inward clamping force from a fastening spring installed in an elastic cavity. This causes the first and second sealing lips to fit tightly against the outer wall of the rotor, reducing the gap between the body and the rotor, improving the sealing effect, and employing mechanical cleaning, thus ensuring ventilation while reducing energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of air preheater technology, and more specifically, to a suspended air preheater. Background Technology

[0002] A suspended air preheater is a heat exchange surface in which flue gas from the boiler's tail flue is preheated to a certain temperature by internal heat exchange fins before entering the boiler. It is a device used to improve the boiler's heat exchange performance and reduce energy consumption. However, in existing suspended air preheaters, there are a large number of gaps between the rotor and the body during operation, allowing some flue gas to pass through these gaps, reducing the efficiency of air preheating. Furthermore, traditional suspended air preheaters accumulate a lot of dust on the rotor during long-term use. Because traditional suspended air preheaters do not have a dust removal function, workers need to disassemble the rotor for cleaning.

[0003] Patent authorization number CN219656118U discloses a suspended air preheater, specifically consisting of a body and two ventilation ducts. The two ventilation ducts are fixedly connected to the upper and lower sides of the body. The ventilation ducts are provided with a first air inlet and a second air inlet, both of which are connected to the inner cavity of the body. A rotating shaft is rotatably connected to the top of the inner wall of the upper ventilation duct. The rotor is fixedly connected to the bottom end of the rotating shaft and located in the inner cavity of the body. Two placement slots solve the problem of a large gap between the rotor and the body, which allows some flue gas to pass through the gap between the rotor and the body, reducing the efficiency of air preheating. It also solves the problem of a large amount of dust adhering to the rotor during long-term use of traditional suspended air preheaters, which require the operator to disassemble the rotor for cleaning because traditional suspended air preheaters do not have a dust cleaning function.

[0004] However, in patent authorization number CN219656118U, the first arc-shaped sealing plate and the second arc-shaped sealing plate are spliced ​​together by a half-width structure. The spliced ​​structure will affect its sealing performance to a certain extent. Furthermore, if the high-pressure air pipe is blown intermittently, dust will still be covered before the blown, affecting the ventilation effect. If the blown continuously, it will increase energy consumption. There is still room for improvement. Therefore, we propose a hanging air preheater to solve the above-mentioned problems. Utility Model Content

[0005] 1. Technical problems to be solved

[0006] To address the problems existing in the prior art, the purpose of this utility model is to provide a suspended air preheater. It utilizes the elastic metal sealing body located inside the metal frame, which is subjected to the inward tightening force of the fastening spring installed in the elastic cavity. This causes the first sealing lip and the second sealing lip to fit tightly against the outer wall of the rotor, reducing the gap between the machine body and the rotor, improving the sealing effect. Furthermore, the mechanical cleaning method ensures ventilation while reducing energy consumption.

[0007] 2. Technical Solution

[0008] To solve the above problems, the present invention adopts the following technical solution.

[0009] A suspended air preheater includes a body, ventilation ducts installed at the top and bottom of the body, a first air inlet and a second air inlet disposed on both sides of the ventilation duct, a rotating shaft installed on the ventilation duct, and a rotor installed on the inner side of the body and rotatably connected to the rotating shaft. The body has mounting grooves at the top and bottom corresponding to the rotor.

[0010] A sealing assembly is detachably connected to the inner side of the mounting slot;

[0011] The sealing assembly includes a metal frame fixedly connected to the inner side of the mounting groove, an assembly groove circumferentially disposed on the inner side of the metal frame, an elastic metal sealing body mounted on the inner side of the assembly groove, a first sealing lip and a second sealing lip integrally formed on the inner wall of the elastic metal sealing body, an elastic cavity circumferentially disposed on the elastic metal sealing body, a spring groove circumferentially disposed on the inner side of the elastic cavity, and a fastening spring mounted on the inner side of the spring groove.

[0012] Furthermore, cleaning components are symmetrically installed on the ventilation duct;

[0013] The cleaning assembly includes a mounting base installed on the ventilation duct, guide holes formed at both ends of the mounting base, a brush movably connected to the port of the mounting base, a guide post mounted on the connecting handle of the brush and slidably connected to the guide holes, and a rigid spring with one end connected to the inner wall of the mounting base and the other end connected to the brush.

[0014] Furthermore, the bristles of the brush are attached to the mesh of the rotor, and the bristles of the brush are made of glass fiber.

[0015] Furthermore, countersunk holes are provided at the edge of the metal frame, and multiple countersunk holes are arranged in a ring around the radial position of the metal frame.

[0016] Furthermore, the mounting groove has a screw hole corresponding to the countersunk hole.

[0017] Furthermore, both the first and second sealing lips are tightly fitted to the outer wall of the rotor.

[0018] Furthermore, the fastening spring has a ring structure.

[0019] 3. Beneficial effects

[0020] Compared with existing technologies, the advantages of this utility model are:

[0021] (1) In this scheme, when the rotor rotates, the elastic metal sealing body located inside the metal frame is subjected to the inward tightening force of the fastening spring installed in the elastic cavity, so that the first sealing lip and the second sealing lip are tightly fitted to the outer wall of the rotor, reducing the gap between the machine body and the rotor, reducing the amount of flue gas passing between the machine body and the rotor, allowing more flue gas to enter the rotor, and allowing the heat of the flue gas to be fully absorbed by the rotor inside the machine body. When the rotor that has absorbed the heat rotates to the left, it will send the heat to the air entering the inner cavity on the left side of the machine body, heating the air and improving the sealing effect.

[0022] (2) In this solution, the brush is pushed by the elastic force of the hard spring and guided by the guide pin and guide hole, so that the brush bristles are always in contact with the rotor mesh, thus achieving a good cleaning effect, ensuring ventilation effect and reducing energy consumption. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the body structure of this utility model;

[0025] Figure 3 This is a three-dimensional structural diagram of the sealing component of this utility model;

[0026] Figure 4 This is an axial sectional view of the metal frame of this utility model;

[0027] Figure 5 This is an enlarged schematic diagram of part A of the present invention;

[0028] Figure 6 This is a three-dimensional structural diagram of the cleaning component of this utility model;

[0029] Figure 7 This is a side view of the mounting base of this utility model;

[0030] Figure 8 This is a cross-sectional view of the mounting base AA of this utility model.

[0031] Explanation of the labels in the diagram:

[0032] 1. Body; 2. Ventilation duct; 3. First air inlet; 4. Second air inlet; 5. Rotating shaft; 6. Rotor; 7. Metal frame; 8. Elastic metal seal; 9. Countersunk hole; 10. Assembly slot; 11. First sealing lip; 12. Second sealing lip; 13. Elastic cavity; 14. Fastening spring; 15. Mounting base; 16. Brush; 17. Guide hole; 18. Guide post; 19. Hard spring. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0034] Example:

[0035] Please see Figure 1-8 A suspended air preheater includes a body 1, ventilation ducts 2 installed at the top and bottom of the body 1, a first air inlet 3 and a second air inlet 4 set on both sides of the ventilation duct 2, a rotating shaft 5 installed on the ventilation duct 2, and a rotor 6 installed on the inner side of the body 1 and rotatably connected to the rotating shaft 5. The body 1 is provided with mounting grooves at the top and bottom of the rotor 6.

[0036] A sealing component is detachably connected to the inside of the mounting slot;

[0037] The sealing assembly includes a metal frame 7 fixedly connected to the inner side of the mounting groove, an assembly groove 10 circumferentially disposed on the inner side of the metal frame 7, an elastic metal sealing body 8 installed on the inner side of the assembly groove 10, a first sealing lip 11 and a second sealing lip 12 integrally formed on the inner wall of the elastic metal sealing body 8, an elastic cavity 13 circumferentially disposed on the elastic metal sealing body 8, a spring groove circumferentially disposed on the inner side of the elastic cavity 13, and a fastening spring 14 installed on the inner side of the spring groove.

[0038] It should be noted that when using this suspended air preheater, the ventilation duct 2 is connected to the air pipe, and then the entire device is started, allowing the flue gas in the air pipe to enter the inner cavity of the body 1 and the rotor 6 through the first air inlet 3 and the second air inlet 4. Under the disturbance of the airflow, the rotating shaft 5 will drive the rotor 6 to rotate. When the rotor 6 rotates, the elastic metal sealing body 8 located inside the metal frame 7 is subjected to the inward clamping force of the fastening spring 14 installed in the elastic cavity 13, so that the first sealing lip 11 and the second sealing lip 12 are tightly fitted to the outer wall of the rotor 6, reducing the gap between the body 1 and the rotor 6, reducing the amount of flue gas passing between the body 1 and the rotor 6, allowing more flue gas to enter the rotor 6, and allowing the heat of the flue gas to be fully absorbed by the rotor 6 inside the body 1. When the rotor 6, which has absorbed heat, rotates to the left, it will send the heat to the air entering the left inner cavity of the body 1, heating the air and improving the sealing effect.

[0039] like Figure 1 , Figure 6 , Figure 7 , Figure 8 As shown, cleaning components are symmetrically installed on ventilation duct 2;

[0040] The cleaning assembly includes a mounting base 15 installed on the ventilation duct 2, guide holes 17 opened at both ends of the mounting base 15, a brush 16 movably connected to the port of the mounting base 15, a guide post 18 installed on the connecting handle of the brush 16 and slidably connected to the guide hole 17, and a rigid spring 19 with one end connected to the inner wall of the mounting base 15 and the other end connected to the brush 16.

[0041] The bristles of brush 16 are attached to the mesh of rotor 6, and the bristles of brush 16 are made of fiberglass.

[0042] It should be noted that by utilizing the elastic force of the rigid spring 19, the brush 16 is pushed and guided by the guide post 18 and the guide hole 17, so that the bristles of the brush 16 are always in contact with the mesh of the rotor 6, thus achieving a good cleaning effect, ensuring ventilation and reducing energy consumption.

[0043] The bristles of brush 16 are made of fiberglass, which is not only heat-resistant but also has excellent wear resistance.

[0044] like Figure 2 , Figure 3 As shown, countersunk holes 9 are provided at the edge of the metal frame 7, and multiple countersunk holes 9 are arranged in a ring around the radial position of the metal frame 7. Screw holes are provided in the mounting groove corresponding to the countersunk holes 9.

[0045] It should be noted that this facilitates the installation and fixation of the metal frame 7.

[0046] like Figure 5 As shown, the first sealing lip 11 and the second sealing lip 12 are both tightly fitted to the outer wall of the rotor 6, and the fastening spring 14 has a ring structure.

[0047] It should be noted that the elastic metal sealing body 8 located inside the metal frame 7 is subjected to an inward clamping force from the fastening spring 14 installed in the elastic cavity 13, thereby making the first sealing lip 11 and the second sealing lip 12 fit tightly against the outer wall of the rotor 6, ensuring the sealing effect.

[0048] In use: Connect the ventilation duct 2 to the air pipe, then start the whole device, so that the flue gas in the air pipe enters the inner cavity of the body 1 and the rotor 6 through the first air inlet 3 and the second air inlet 4. Under the disturbance of the airflow, the rotating shaft 5 will drive the rotor 6 to rotate. When the rotor 6 rotates, the elastic metal sealing body 8 located inside the metal frame 7 is subjected to the inward clamping force of the fastening spring 14 installed in the elastic cavity 13, so that the first sealing lip 11 and the second sealing lip 12 are tightly attached to the outer wall of the rotor 6, reducing the gap between the body 1 and the rotor 6, reducing the amount of flue gas passing between the body 1 and the rotor 6, allowing more flue gas to enter the rotor 6, and allowing the heat of the flue gas to be fully absorbed by the rotor 6 inside the body 1. When the rotor 6, which has absorbed heat, rotates to the left, it will send the heat to the air entering the left inner cavity of the body 1 to heat the air.

[0049] The above description is merely a preferred embodiment of this utility model; however, the protection scope of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be included within the protection scope of this utility model.

Claims

1. A hanging air preheater, comprising a machine body (1), ventilation ducts (2) installed at the top and bottom ends of the machine body (1), a first air inlet (3) and a second air inlet (4) arranged on both sides of the ventilation ducts (2), a rotating shaft (5) installed on the ventilation ducts (2), and a rotor (6) installed on the inner side of the machine body (1) and rotationally connected with the rotating shaft (5), characterized in that: The body (1) has mounting slots at both the top and bottom of the rotor (6); A sealing assembly is detachably connected to the inner side of the mounting slot; The sealing assembly includes a metal frame (7) fixedly connected to the inner side of the mounting groove, an assembly groove (10) circumferentially disposed on the inner side of the metal frame (7), an elastic metal sealing body (8) installed on the inner side of the assembly groove (10), a first sealing lip (11) and a second sealing lip (12) integrally formed on the inner wall of the elastic metal sealing body (8), an elastic cavity (13) circumferentially disposed on the elastic metal sealing body (8), a spring groove circumferentially disposed on the inner side of the elastic cavity (13), and a fastening spring (14) installed on the inner side of the spring groove.

2. A suspended air preheater according to claim 1, characterized in that: Cleaning components are symmetrically installed on the ventilation duct (2); The cleaning assembly includes a mounting base (15) installed on the ventilation duct (2), guide holes (17) opened at both ends of the mounting base (15), a brush (16) movably connected to the port of the mounting base (15), a guide post (18) installed on the connecting handle of the brush (16) and slidably connected to the guide hole (17), and a rigid spring (19) with one end connected to the inner wall of the mounting base (15) and the other end connected to the brush (16).

3. A suspended air preheater according to claim 2, characterized in that: The bristles of the brush (16) are attached to the mesh of the rotor (6), and the bristles of the brush (16) are made of glass fiber.

4. A suspended air preheater according to claim 1, characterized in that: The metal frame (7) has countersunk holes (9) at its edge, and multiple countersunk holes (9) are arranged in a ring around the radial position of the metal frame (7).

5. A suspended air preheater according to claim 4, characterized in that: The mounting groove has a screw hole at the location corresponding to the countersunk hole (9).

6. A suspended air preheater according to claim 1, characterized in that: The first sealing lip (11) and the second sealing lip (12) are both in close contact with the outer wall of the rotor (6).

7. A suspended air preheater according to claim 1, characterized in that: The fastening spring (14) has a ring structure.

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