Air preheater with easily replaceable core

Abstract

This utility model relates to the field of air preheater technology, specifically an air preheater with a convenient core replacement mechanism. It includes a flue, with a fixed air inlet fixedly installed on one side of the upper end of the flue, and a detachable air inlet fixedly and detachably installed on the other side of the upper end of the flue via bolts. A through groove is formed on the side of the upper end of the flue to mate with the fixed and detachable air inlets. A core is movably installed within the through groove at the upper end of the flue. Two U-shaped slide rails are fixedly installed on both sides of the flue. The core includes a sealing plate and a heat exchange tube. This air preheater allows for convenient core replacement, enabling the core to be easily pulled out and installed from the detachable air inlet side. Operators can quickly replace the core without the need for complex tools and extensive disassembly work, significantly shortening equipment maintenance time, improving production efficiency, and reducing maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of air preheater technology, specifically to an air preheater with a convenient core replacement mechanism. Background Technology

[0002] An air preheater is a heat exchange surface in the boiler tail flue that preheats the air entering the boiler to a certain temperature through internal heat dissipation fins. It is a device used to improve the heat exchange performance of the boiler and reduce energy consumption.

[0003] The heat exchange components inside the air preheater are the core of the air preheater. Under long-term exposure to heat, corrosion, and airflow scouring, they are prone to damage, dust accumulation, and blockage, affecting the heat exchange efficiency and overall performance of the preheater. However, most existing air preheater cores are fixedly connected to the flue. When replacing them, not only do a large number of peripheral components need to be removed, but also professional personnel need to use a lot of tools and equipment to disassemble the entire preheater. This not only increases the difficulty of maintenance, but also leads to longer equipment downtime, affecting the continuity and efficiency of production. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model discloses an air preheater that facilitates the replacement of the core. The technical solution adopted is as follows: it includes a flue, a fixed air port is fixedly installed on the side of the upper end of the flue, and a disassembly air port is fixedly and detachably installed on the other side of the upper end of the flue by bolts. A through groove is opened on the side of the upper end of the flue to cooperate with the fixed air port and the disassembly air port. The core is movably installed in the through groove at the upper end of the flue. Two U-shaped slide rails are fixedly installed on both sides of the middle part of the flue.

[0005] The core includes a sealing plate and heat exchange tubes. There are two sealing plates, and the opposite sides of the two sealing plates are fixedly connected to the two ends of several heat exchange tubes. The sides of the two sealing plates are provided with through holes corresponding to the heat exchange tubes. The length and width of one sealing plate are smaller than the length and width of the through groove on the side of the flue near the disassembly air port, and the length and width of the sealing plate are larger than the length and width of the through groove on the side of the flue near the fixed air port. The length and width of the other sealing plate are larger than the length and width of the through groove on the side of the flue near the disassembly air port.

[0006] The two sealing plates are fixedly connected to the two ends of the two support plates on opposite sides. Slider blocks are installed at the bottom of both ends of the two support plates. The four slider blocks are slidably installed in the two slide rails.

[0007] As a preferred technical solution of this utility model, the slider includes a fixed slider, a spring and a movable slider. The fixed slider is fixedly installed at the bottom of the support plate near the larger sealing plate. The top of the movable slider is provided with a trapezoidal protrusion. The trapezoidal protrusion at the top of the movable slider is slidably installed in a trapezoidal groove on the other side of the support plate. The two ends of the spring are fixedly connected to the opposite sides of the fixed slider and the movable slider, respectively.

[0008] As a preferred embodiment of this utility model, rubber rings are fixedly installed on the sides of both sealing plates, and the two rubber rings cooperate with the flue.

[0009] As a preferred technical solution of this utility model, a U-shaped pull rod is fixedly installed on the side of the sealing plate near the disassembly air port.

[0010] As a preferred embodiment of this utility model, steel balls are rotatably installed in the spherical grooves at the bottom of both the fixed slider and the movable slider, and the side of the steel balls contacts the bottom of the slide rail.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model, through the detachable disassembly air port and the size design of the core, allows the core to be easily pulled out and installed from the side of the disassembly air port. Operators can quickly replace the core without the need for complicated tools and a lot of disassembly work, which greatly shortens the equipment maintenance time, improves production efficiency, and reduces maintenance costs.

[0013] 2. During the entire core extraction process, the spring will push out a portion of the moving slider. When the core is completely extracted to the outside, the moving slider will provide support for the core, facilitating the handling and hoisting of the core. In addition, steel balls are rotatably installed in the spherical grooves at the bottom of the fixed slider and the moving slider, making the core slide more smoothly and stably in the slide rail.

[0014] 3. The pull rod allows operators to easily pull the core, further improving the convenience of core replacement operations and reducing the labor intensity of operators. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the disassembly structure of the air vent of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the present invention. Figure 1 ;

[0019] Figure 5 This is a schematic diagram of the internal structure of the present invention. Figure 2 ;

[0020] Figure 6 This is a schematic diagram of the core structure of this utility model;

[0021] Figure 7 This is a schematic diagram of the slider structure of this utility model.

[0022] In the diagram: 1. Flue, 2. Disassembled air inlet, 3. Fixed air inlet, 4. Core, 41. Sealing plate, 42. Heat exchange tube, 5. Support plate, 6. Slide rail, 7. Slider, 71. Fixed slider, 72. Spring, 73. Moving slider, 8. Rubber ring, 9. Pull rod, 10. Steel ball. Detailed Implementation

[0023] Example 1

[0024] like Figures 1 to 7 As shown, this utility model discloses an air preheater that facilitates core replacement. The technical solution adopted includes a flue 1, a fixed air inlet 3 fixedly installed on the side of the upper end of the flue 1, and a disassembly air inlet 2 fixedly and detachably installed on the other side of the upper end of the flue 1 by bolts. A through groove is opened on the side of the upper end of the flue 1 to cooperate with the fixed air inlet 3 and the disassembly air inlet 2. A core 4 is movably installed in the through groove at the upper end of the flue 1. Two U-shaped slide rails 6 are fixedly installed on both sides of the middle part of the flue 1.

[0025] The core 4 includes sealing plates 41 and heat exchange tubes 42. Two sealing plates 41 are provided, and their opposite sides are fixedly connected to both ends of several heat exchange tubes 42. Through holes corresponding to the heat exchange tubes 42 are opened on the sides of the two sealing plates 41. The length and width of one sealing plate 41 are smaller than the length and width of the through groove on the side of the flue 1 near the disassembly air inlet 2, while the length and width of this sealing plate 41 are larger than the length and width of the through groove on the side of the flue 1 near the fixed air inlet 2. The length and width of the other sealing plate 41 are larger than the length and width of the through groove on the side of the flue 1 near the disassembly air inlet 2. The length and width of the through groove on one side of the air inlet 2 are specified. Rubber rings 8 are fixedly installed on the sides of both sealing plates 41, and these two rubber rings 8 cooperate with the flue 1. A U-shaped pull rod 9 is fixedly installed on the side of the sealing plate 41 near the disassembly air inlet 2. The pull rod 9 allows the operator to easily pull the core 4, further improving the convenience of core 4 replacement and reducing the operator's labor intensity. The detachable disassembly air inlet 2, combined with the size design of the core 4, allows the core 4 to be easily pulled out and installed from the side of the disassembly air inlet 2. Operators can quickly complete the core replacement without the need for complex tools and extensive disassembly work, greatly shortening equipment maintenance time, improving production efficiency, and reducing maintenance costs.

[0026] The two sealing plates 41 are fixedly connected to the two ends of the two support plates 5 on opposite sides. Slider 7 is installed at the bottom of both ends of the two support plates 5. Four sliders 7 are slidably installed within two slide rails 6. Each slider 7 includes a fixed slider 71, a spring 72, and a movable slider 73. The fixed slider 71 is fixedly installed at the bottom of the support plate 5 near the larger sealing plate 41. The movable slider 73 has a trapezoidal protrusion at its top, which slidably installs within a trapezoidal groove on the other side of the support plate 5. The two ends of the spring 72 are respectively connected to the fixed slider 71. The fixed slider 71 and the movable slider 73 are fixedly connected to each other on opposite sides. Steel balls 10 are rotatably installed in the spherical grooves at the bottom of both the fixed slider 71 and the movable slider 73. The side of the steel balls 10 contacts the bottom of the slide rail 6. During the entire process of the core 4 being pulled out, the spring 72 will push out a part of the movable slider 73. When the core 4 is completely pulled out to the outside, the movable slider 73 will provide support for the core 4, which is convenient for the core 4 to be transported and hoisted. The steel balls 10 are rotatably installed in the spherical grooves at the bottom of the fixed slider 71 and the movable slider 73, which makes the core 4 slide more smoothly and stably in the slide rail 6.

[0027] The working principle of this utility model is as follows: Under normal operating conditions, high-temperature flue gas in the boiler tail flue passes through flue 1. When flowing through the core body 4, heat is transferred through heat exchange tubes 42 to the cold air entering from the fixed air inlet 3 and the disassembly air inlet 2. The core body 4, composed of heat exchange tubes 42 and sealing plate 41, is a key component for heat exchange. The cold air is heated when flowing through the heat exchange tubes 42, thereby increasing the temperature of the air entering the boiler, thus improving the boiler's heat exchange performance and reducing energy consumption. When the core body 4 needs to be replaced, the disassembly air inlet 2 is first removed. At this time, the special size design of the core body 4 is utilized. The larger sealing plate 41 is located near the disassembly air port 2. The operator pulls the lever 9 to move the core 4 along the slide rail 6, causing the slider 7 to slide inside it, ensuring the stability of the core 4's movement. During the extraction of the core 4, the spring 72 pushes out part of the moving slider 73. When the core 4 is completely extracted outside the flue 1, the moving slider 73 provides additional support for the core 4, facilitating subsequent handling and hoisting. At the same time, the steel balls 10 at the bottom of the fixed slider 71 and the moving slider 73 roll inside the slide rail 6, greatly reducing friction and making the core 4 slide more smoothly inside the slide rail 6.

[0028] It is worth noting that the structure of the core 4 in this embodiment is one of the embodiments shown. In actual use, heat-conducting fins can be fixedly installed on the heat exchange tube 42 to improve its heat exchange efficiency. Components not described in detail in this document are prior art.

[0029] While the specific embodiments of this utility model have been described in detail above, this utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model. Modifications or variations that do not involve creative labor are still within the protection scope of this utility model.

Claims

1. An air preheater with a convenient core replacement mechanism, characterized in that, Includes a flue (1), a fixed air inlet (3) is fixedly installed on the side of the upper end of the flue (1), and a disassembly air inlet (2) is fixedly and detachably installed on the other side of the upper end of the flue (1) by bolts. A through groove is opened on the side of the upper end of the flue (1) to cooperate with the fixed air inlet (3) and the disassembly air inlet (2). A core (4) is movably installed in the through groove at the upper end of the flue (1). Two U-shaped slide rails (6) are fixedly installed on both sides inside the flue (1). The core (4) includes a sealing plate (41) and a heat exchange tube (42). There are two sealing plates (41). The opposite sides of the two sealing plates (41) are fixedly connected to the two ends of a plurality of heat exchange tubes (42). The two sealing plates (41) have through holes corresponding to the heat exchange tubes (42) on their sides. The length and width of one of the sealing plates (41) are smaller than the length and width of the through groove on the side of the flue (1) near the disassembly air port (2). The length and width of the sealing plate (41) are larger than the length and width of the through groove on the side of the flue (1) near the fixed air port (2). The length and width of the other sealing plate (41) are larger than the length and width of the through groove on the side of the flue (1) near the disassembly air port (2). The two sealing plates (41) are fixedly connected to the two ends of the two support plates (5) on opposite sides. Slider (7) is installed at the bottom of both ends of the two support plates (5). The four sliders (7) are slidably installed in the two slide rails (6).

2. An air preheater with a convenient core replacement according to claim 1, characterized in that: The slider (7) includes a fixed slider (71), a spring (72) and a movable slider (73). The fixed slider (71) is fixedly installed on the bottom of the support plate (5) near the larger sealing plate (41). The top of the movable slider (73) is provided with a trapezoidal protrusion. The trapezoidal protrusion on the top of the movable slider (73) is slidably installed in the trapezoidal groove on the other side of the support plate (5). The two ends of the spring (72) are fixedly connected to the opposite sides of the fixed slider (71) and the movable slider (73) respectively.

3. An air preheater with a convenient core replacement according to claim 1, characterized in that: Rubber rings (8) are fixedly installed on the sides of both sealing plates (41), and the two rubber rings (8) cooperate with the flue (1).

4. An air preheater with a convenient core replacement according to claim 1, characterized in that: A U-shaped tie rod (9) is fixedly installed on the side of the sealing plate (41) near the disassembly air port (2).

5. An air preheater with a convenient core replacement according to claim 2, characterized in that: Steel balls (10) are rotatably installed in the spherical grooves at the bottom of both the fixed slider (71) and the movable slider (73), and the side of the steel ball (10) contacts the bottom of the slide rail (6).

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