Air preheater

Abstract

The utility model relates to the technical field of air preheaters, and discloses an air preheater which comprises a shell, a heating wire installed inside the shell and a second filter screen inside the shell, a connecting piece is installed at the bottom of the heating wire, and the connecting piece comprises a collecting plate located at the bottom of the inner side of the second filter screen. A fixed arc-shaped plate is fixedly connected into the collecting plate, a movable arc-shaped plate is installed on one side of the fixed arc-shaped plate, and rubber balls in an annular array are installed on the inner side of the fixed arc-shaped plate and the inner side of the movable arc-shaped plate. According to the air preheater, through the arrangement of the second filter screen and the connecting piece, the heating wire can be rapidly replaced, the mode is easy to operate, the problem that in the prior art, replacement of the heating wire is tedious is solved, meanwhile, fragments can be collected, and the operation difficulty and time cost are further reduced.

Description

Technical Field

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

[0002] An air preheater is a device used to heat air and is widely applied in the industrial and construction fields. Its main function is to heat cold air to a certain temperature and increase its humidity to improve the comfort and application range of the air.

[0003] A Chinese patent with the authorized announcement number CN220689123U discloses an air preheater, which includes a housing, a plurality of heating tubes fixed to the inner wall of the housing, a plurality of first filters for blocking dust, and a plurality of second filters. By arranging a plurality of first filters and second filters, the device can be cleaned without stopping work; however, in actual operation, although the heating wire inside the device heats up quickly and is convenient to use, its service life is relatively short and it is prone to aging or burning out after long-term use. Therefore, it needs to be replaced regularly. However, in the above prior art, the heating wire is directly fixed inside the housing, and when replacing it, the operation is rather cumbersome; and when the heating wire is damaged, the structure on its surface will remain inside the housing, and when cleaning the remaining structure or fragments, the overall structure of the housing needs to be removed, which is time-consuming and laborious to operate, and will increase the additional operation difficulty and time cost.

[0004] To sum up, the current air preheater still has the following defects during use:

[0005] (1) The heating wire is fixed inside the housing in a fixed manner, and when replacing the heating wire, the operation is rather cumbersome;

[0006] (2) When the heating wire is damaged, the housing needs to be completely removed to clean its fragments or structure, which is time-consuming and laborious to operate, and will increase the operation difficulty and time cost. Summary of the Utility Model

[0007] In order to overcome the defects of the above-mentioned prior art, the inventor of the present utility model has conducted in-depth research and completed the present utility model after a large amount of creative labor.

[0008] Specifically, the technical problem to be solved by the present utility model is: to provide an air preheater to solve the technical problem that when the heating wire is fixed inside the housing in a fixed manner and the heating wire is replaced, the operation is rather cumbersome.

[0009] To solve the above technical problem, the present utility model provides the following technical solution:

[0010] An air preheater, comprising a housing, a first filter screen and a heating wire installed inside the housing. A second filter screen is installed on one side of the housing interior away from the first filter screen. The heating wire is located inside the second filter screen and is movably connected thereto. A connecting member is installed at the bottom of the heating wire and inside the second filter screen. A positioning member is installed on the inner side of the second filter screen and at the top of the heating wire. The connecting member includes a collecting plate located at the inner bottom of the second filter screen. A fixed arc plate is fixedly connected inside the collecting plate. The fixed arc plate is located on one side of the bottom of the heating wire. A movable arc plate is installed on one side of the fixed arc plate and on the other side of the heating wire. The movable arc plate is located inside the collecting plate and is movably connected thereto. Rubber balls are installed in an annular array on the inner sides of the fixed arc plate and the movable arc plate.

[0011] As an improved technical solution, both sides of the movable arc plate are fixedly connected with sliders. A chute is opened on the inner side of the collecting plate. The sliders are located inside the chute and are movably connected thereto.

[0012] As an improved technical solution, a bolt is rotatably connected to the outer surface of the movable arc plate. A fixed block is fixedly connected inside the collecting plate. The fixed block is located on one side of the movable arc plate. One side of the bolt extends to the other side of the fixed block and is threadedly connected thereto.

[0013] As an improved technical solution, a bearing plate is installed at the top of the heating wire. Limit blocks are fixedly connected to both sides of the bearing plate and the collecting plate. A limit groove is opened on the inner side of the second filter screen. The limit blocks are located inside the limit groove and are movably connected thereto.

[0014] As an improved technical solution, a handle is fixedly connected to the top of the bearing plate. There are two groups of positioning members. The handle is located inside the two groups of positioning members.

[0015] As an improved technical solution, the positioning member includes a housing fixed to the top of the bearing plate. A sliding rod is movably sleeved inside the housing. A spring is sleeved on the surface of the sliding rod. One end of the sliding rod is fixedly connected with a limiting plate. The diameter of the limiting plate is larger than that of the sliding rod. Both ends of the spring are fixedly connected to the limiting plate and the inner side of the housing respectively.

[0016] As an improved technical solution, a connecting plate is provided on one side of the housing. One end of the sliding rod extends to the outside of the housing and is fixedly connected with the connecting plate. A pull handle is fixedly connected to the surface of the connecting plate.

[0017] As an improved technical solution, a connecting block is fixedly connected to the other end of the limiting plate and away from the sliding rod. A connecting groove is formed inside the second filter screen. Both the connecting block and the connecting groove are hexagonal. The connecting block is located inside the connecting groove and is movably connected thereto.

[0018] After adopting the above technical solution, the beneficial effects of the present utility model are as follows:

[0019] 1. In the present utility model, by providing the second filter screen and the connecting member, the heating wire can be quickly replaced, and this method is simple to operate, avoiding the problem that the replacement of the heating wire in the prior art is more cumbersome. At the same time, the fragments can be collected, and there is no need to disassemble the housing, further reducing the operation difficulty and time cost.

[0020] 2. In the present utility model, by providing the positioning member, it is possible to select a method of only taking out the heating wire or taking out the heating wire and the second filter screen together according to the degree of blockage of the second filter screen. Moreover, this method can replace two sets of structures at a time, and the operation is simple and time-saving, thus improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0022] Figure 1 is a schematic diagram of the overall structure of the air preheater of the present utility model.

[0023] Figure 2 is a schematic cross-sectional structure diagram of the air preheater of the present utility model.

[0024] Figure 3 is a schematic diagram of the positional relationship between the second filter screen and the heating wire of the air preheater of the present utility model.

[0025] Figure 4 is a schematic structural diagram of the positional relationship among the heating wire, the connecting member, and the positioning member of the air preheater of the present utility model.

[0026] Figure 5 is a diagram showing the structure of the connecting member of the air preheater of the present utility model.

[0027] Figure 6 is a schematic cross-sectional view of the structure of the positioning member of the air preheater of the present utility model.

[0028] Figure 7 is a diagram showing the structure of the positioning member of the air preheater of the present utility model.

[0029] Description of the reference numerals:

[0030] 1. Housing; 2. First filter screen; 3. Heating wire; 4. Second filter screen; 5. Connector; 51. Collection plate; 52. Fixed arc plate; 53. Movable arc plate; 54. Rubber ball; 55. Slide block; 56. Slide groove; 58. Bolt; 581. Fixed block; 59. Bearing plate; 591. Limiting block; 592. Limiting groove; 593. Handle; 6. Positioning member; 61. Outer shell; 62. Slide bar; 63. Limiting plate; 64. Spring; 65. Connecting block; 66. Connecting groove; 67. Connecting plate; 68. Pull handle. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0032] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0033] At the same time, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time.

[0034] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. Embodiment

[0035] Refer to Figures 1-5, which is the first embodiment of the present utility model, provides an air preheater. This air preheater includes a housing 1, a first filter screen 2 and a heating wire 3 installed inside the housing 1. An air inlet and an air outlet are respectively provided on both sides of the housing 1. A second filter screen 4 is installed on the side of the housing 1 away from the first filter screen 2. The heating wire 3 is located inside the second filter screen 4 and is movably connected thereto. A connecting member 5 is installed at the bottom of the heating wire 3 and inside the second filter screen 4. A positioning member 6 is installed on the inner side of the second filter screen 4 and above the heating wire 3. The second filter screen 4 is arranged in a bin shape and can wrap the heating wire 3 inside to achieve the purpose of collecting its fragments. Insulating plates are installed at both ends of the heating wire 3 to prevent the heat of the heating wire 3 from damaging the rubber balls 54, the fixed arc plate 52 and the movable arc plate 53. By arranging the heating wire 3 inside the second filter screen 4, on the one hand, the air circulation can be maintained, on the other hand, the air that has not been filtered by the first filter screen 2 can be filtered again, and at the same time, the fragments of the heating wire 3 can be collected to prevent the fragments from directly falling inside the housing 1. At the same time, multiple groups of the first filter screen 2 are provided to facilitate more comprehensive filtration of impurities in the air. The connecting member 5 includes a collecting plate 51 located at the inner bottom of the second filter screen 4. A fixed arc plate 52 is fixedly connected inside the collecting plate 51. The fixed arc plate 52 is located on one side of the bottom of the heating wire 3. A movable arc plate 53 is installed on one side of the fixed arc plate 52 and on the other side of the heating wire 3. The movable arc plate 53 is located inside the collecting plate 51 and is movably connected thereto. Annularly arrayed rubber balls 54 are installed on the inner sides of the fixed arc plate 52 and the movable arc plate 53. The rubber balls 54 can increase the friction with the insulating plate to achieve the purpose of stable connection and ensure the stability of the heating wire 3 during installation.

[0036] Both sides of the movable arc plate 53 are fixedly connected with sliders 55. Sliding grooves 56 are opened on the inner side of the collecting plate 51. The sliders 55 are located inside the sliding grooves 56 and are movably connected thereto. The movable arc plate 53 and the collecting plate 51 are movably connected through the sliders 55 and the sliding grooves 56, which can ensure the stability of the movable arc plate 53 during movement and prevent it from directly separating from the collecting plate 51. The inside of the collecting plate 51 is arranged in a groove shape to collect fragments.

[0037] A bolt 58 is rotatably connected to the outer surface of the movable arc plate 53. A fixed block 581 is fixedly connected inside the collecting plate 51. The fixed block 581 is located on one side of the movable arc plate 53. One side of the bolt 58 extends to the other side of the fixed block 581 and is threadedly connected thereto. The bolt 58 penetrates through the fixed block 581, which can facilitate the driving of the movable arc plate 53 to achieve the purpose of fixing and disconnecting the insulating plate at the bottom of the heating wire 3. Hexagonal grooves are provided at both ends of the inner side of the movable arc plate 53 and away from both ends of the bolt 58. At the same time, on the inner side of the fixed arc plate 52 and on both sides of the rubber ball 54, hexagonal rods connected by hexagonal grooves are fixedly connected, which can increase the stability when the two are connected.

[0038] A bearing plate 59 is installed on the top of the heating wire 3. Limit blocks 591 are fixedly connected to both sides of the bearing plate 59 and the collecting plate 51. A limit groove 592 is provided inside the second filter screen 4. The limit blocks 591 are located inside the limit groove 592 and are movably connected thereto, which can facilitate the removal of the heating wire 3. At the same time, the inner structures of the bearing plate 59 and the collecting plate 51 are the same.

[0039] A handle 593 is fixedly connected to the top of the bearing plate 59. There are two groups of positioning members 6. The handle 593 is located inside the two groups of positioning members 6. The handle 593 can facilitate the removal of the bearing plate 59, the heating wire 3, and the collecting plate 51.

[0040] The positioning member 6 includes a housing 61 fixed to the top of the bearing plate 59. A slide rod 62 is movably sleeved inside the housing 61. A spring 64 is sleeved on the surface of the slide rod 62. One end of the slide rod 62 is fixedly connected to a limit plate 63. The diameter of the limit plate 63 is larger than that of the slide rod 62. Both ends of the spring 64 are fixedly connected to the inner side of the limit plate 63 and the housing 61 respectively. The setting of the limit plate 63 is used to position the spring 64 and at the same time prevent one end of the slide rod 62 from sliding out of the outside of the housing 61. The spring 64 can make the slide rod 62 have elastic force.

[0041] A connecting plate 67 is provided on one side of the housing 61. One end of the slide rod 62 extends to the outside of the housing 61 and is fixedly connected to the connecting plate 67. A pull handle 68 is fixedly connected to the surface of the connecting plate 67 to facilitate the simultaneous driving of the two slide rods 62.

[0042] A connecting block 65 is fixedly connected to the other end of the limit plate 63 and away from the slide rod 62. A connecting groove 66 is provided inside the second filter screen 4. Both the connecting block 65 and the connecting groove 66 are hexagonal. The connecting block 65 is located inside the connecting groove 66 and is movably connected thereto, which can make the positioning of the bearing plate 59 more accurate. At the same time, whether the two are connected or not can make the heating wire 3 be taken out alone or taken out together with the second filter screen 4.

[0043] During use, air enters the interior of the housing 1 through the air inlet. Multiple groups of first filter nets 2 can intercept impurities and other particles in the air. Subsequently, it contacts the heating wire 3 through the second filter net 4 and forms hot air. When the heating wire 3 needs to be replaced, or it is damaged and drops debris, the debris will directly fall onto the surface of the collection plate 51. At the same time, due to the presence of the second filter net 4, it can prevent the debris from overflowing outside the collection plate 51 and lock the debris inside the collection plate 51. When replacing it, it can be determined whether to replace it according to the degree of blockage of the second filter net 4;

[0044] When only the heating wire 3 needs to be replaced, first, pull the handle 68 so that it drives two groups of sliding rods 62 to move towards the outside of the outer shell 61 through the connecting plate 67. At the same time, the spring 64 is squeezed and deformed, and at the same time, it drives the connection block 65 to disconnect from the connection groove 66 inside the second filter net 4. In this way, the connection between the bearing plate 59 and the second filter net 4 can be cancelled. Subsequently, the heating wire 3 can be directly taken out through the handle 593;

[0045] When disassembling the heating wire 3, reverse-rotate the bolt 58 so that it rotates along the inside of the fixed block 581 and drives the movable arc-shaped plate 53 to move away from the fixed arc-shaped plate 52, so that the movable arc-shaped plate 53 slowly disconnects from the insulating plate, and the heating wire 3 can be disassembled. When replacing the new heating wire 3, rotate the bolt 58 forward until the movable arc-shaped plate 53 is tightly connected to the insulating plate. In this way, the heating wire 3 can be quickly replaced, and this method is simple to operate, avoiding the problem of the cumbersome replacement of the heating wire 3 in the prior art. At the same time, the debris can be collected, further reducing the operation difficulty and time cost. Moreover, this method can replace one group or multiple groups of the heating wire 3 according to the aging degree of the heating wire 3, so as to avoid the phenomenon of wasting resources when replacing multiple groups of heating wires 3 at one time;

[0046] When replacing both the heating wire 3 and the second filter net 4, it is not necessary to pull the handle 68. The connection block 65 is located inside the connection groove 66 by the elastic force of the spring 64 itself, and repeat the above operation of removing the heating wire 3. In this way, the purpose of quickly replacing the second filter net 4 and the heating wire 3 can be achieved, avoiding the problem of time-consuming and laborious operation when replacing the two;

[0047] In addition, the replacement method of the first filter net 2 is the prior art and will not be elaborated here. At the same time, during normal operation, the bearing plate 59 can block the top of the second filter net 4, and there will be no air leakage phenomenon.

[0048] It should be understood that the use of these embodiments is only for illustrating the present utility model and is not intended to limit the protection scope of the present utility model. In addition, it should also be understood that after reading the technical content of the present utility model, those skilled in the art can make various changes, modifications and / or variations to the present utility model, and all these equivalent forms also fall within the protection scope defined by the appended claims of this application.

Claims

1. An air preheater, comprising a housing (1), a first filter (2) and a heating wire (3) installed inside the housing (1), characterized in that: A second filter screen (4) is installed inside the housing (1) and on a side away from the first filter screen (2); the heating wire (3) is located inside the second filter screen (4) and is movably connected thereto; a connecting piece (5) is installed at the bottom of the heating wire (3) and inside the second filter screen (4); and a positioning piece (6) is installed on the inner side of the second filter screen (4) and on the top of the heating wire (3); The connecting member (5) comprises a collecting plate (51) located at the bottom of the inner side of the second filter screen (4); a fixed arc plate (52) is fixedly connected to the inside of the collecting plate (51); the fixed arc plate (52) is located at one side of the bottom of the heating wire (3); a movable arc plate (53) is installed on one side of the fixed arc plate (52) and at the other side of the heating wire (3); the movable arc plate (53) is located inside the collecting plate (51) and is movably connected thereto; and a ring-shaped array of rubber balls (54) are installed on the inner sides of the fixed arc plate (52) and the movable arc plate (53).

2. The air preheater according to claim 1, characterized in that: Slide blocks (55) are fixedly connected to both sides of the movable arc-shaped plate (53); a slide groove (56) is provided on the inner side of the collecting plate (51); the slide block (55) is located inside the slide groove (56) and is movably connected thereto.

3. The air preheater according to claim 2, characterized in that: The outer surface of the movable arc plate (53) is rotatably connected with a bolt (58), and the interior of the collecting plate (51) is fixedly connected with a fixing block (581); the fixing block (581) is located on one side of the movable arc plate (53), and one side of the bolt (58) extends to the other side of the fixing block (581) and is threadedly connected thereto.

4. The air preheater according to claim 3, characterized in that: A bearing plate (59) is installed on the top of the heating wire (3); both sides of the bearing plate (59) and the collecting plate (51) are fixedly connected to limiting blocks (591); a limiting groove (592) is provided on the inner side of the second filter screen (4); the limiting block (591) is located inside the limiting groove (592) and is movably connected thereto.

5. The air preheater according to claim 4, characterized in that: A handle (593) is fixedly connected to the top of the carrying plate (59), and two groups of positioning members (6) are provided, with the handle (593) being located on the inner sides of the two groups of positioning members (6).

6. The air preheater according to claim 5, characterized in that: The positioning member (6) comprises a shell (61) fixed on the top of the bearing plate (59), a slide rod (62) is movably sleeved inside the shell (61), a spring (64) is sleeved on the surface of the slide rod (62), one end of the slide rod (62) is fixedly connected to a limit plate (63), the diameter of the limit plate (63) is larger than that of the slide rod (62), and two ends of the spring (64) are respectively fixedly connected to the limit plate (63) and the inner side of the shell (61).

7. The air preheater according to claim 6, characterized in that: A connecting plate (67) is provided on one side of the housing (61), one end of the sliding rod (62) extends to the outside of the housing (61) and is fixedly connected to the connecting plate (67), and a handle (68) is fixedly connected to the surface of the connecting plate (67).

8. The air preheater according to claim 7, characterized in that: A connecting block (65) is fixedly connected to the other end of the limiting plate (63) and the end away from the sliding rod (62); a connecting groove (66) is provided on the inner side of the second filter screen (4); the connecting block (65) and the connecting groove (66) are both hexagonally arranged; the connecting block (65) is located inside the connecting groove (66) and is movably connected thereto.

Images