Turbolator-cast iron pipe combined air preheater

Abstract

The utility model relates to the technical field of heat exchange devices, in particular to a turbolator-cast iron pipe combined type air preheater which comprises an air inlet pipe, a filter screen is fixedly installed in the air inlet pipe, a round opening is formed in the center of the filter screen, a rotating rod is rotatably installed in the round opening, a rotating blade is fixedly connected to the rotating rod in a sleeved mode, and the rotating blade is fixedly connected with the air inlet pipe in a sleeved mode. Scraping strips are circumferentially and fixedly mounted on the surface of the rotating rod, and are in sliding contact with the surface of the filter screen; a reciprocating screw rod is fixedly mounted at one end of the rotating rod, a sliding plate is connected to the reciprocating screw rod in a threaded and sleeving manner, a plurality of mounting plates are fixedly mounted on the side wall of the sliding plate, and a plurality of conical anti-blocking rods are fixedly mounted on the surfaces of the mounting plates. When smoke or air is introduced into the air inlet pipe at a high speed, the rotating blades can drive the scraping strips to rotate, so that dust and impurities attached to the surface of the filter screen can be scraped, and the situation that the air permeability of the filter screen is affected due to the fact that the accumulated dust and impurities are too much is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchange devices, in particular to a turbulator-cast iron pipe combined air preheater. Background Art

[0002] The air preheater may use one type of heat exchange element, such as a turbulator air preheater or a heat pipe air preheater, or a combined heat exchange element, such as a turbulator + heat pipe air preheater. All of the above air preheaters have the aforementioned dew point corrosion problem, which affects the service life of the air preheater.

[0003] Chinese patent publication number CN204943544U discloses a spoiler-cast iron tube combined air preheater, which has the advantages of simple structure, low cost, wide fuel applicability, etc., and solves the problem of dew point corrosion of the air preheater.

[0004] In the above patent documents, filters for blocking impurities can be set in the air intake pipes for smoke and air. However, after long-term use, a lot of dust and impurities may adhere to the surface of the filter, which may cause the filter to be blocked and affect the air permeability of the filter. Utility Model Content

[0005] The purpose of the present utility model is to solve the following shortcomings in the prior art: in the existing spoiler-cast iron pipe combined air preheater, a filter for blocking impurities can be provided in the air inlet pipe for flue gas and air, but after long-term use, a large amount of dust and impurities may adhere to the surface of the filter, which may cause the filter to be clogged and affect the air permeability of the filter. A spoiler-cast iron pipe combined air preheater is proposed.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A combined air preheater of a spoiler and cast iron pipe comprises an air inlet pipe, a filter screen being fixedly mounted in the air inlet pipe, a circular opening being formed at the center of the filter screen, a rotating rod being rotatably mounted in the circular opening, a rotating blade being fixedly sleeved on the rotating rod, a scraper being fixedly mounted in a circular shape on the surface of the rotating rod, the scraper being in sliding contact with the surface of the filter screen;

[0008] A reciprocating screw is fixedly mounted on one end of the rotating rod, a slide is threadedly sleeved on the reciprocating screw, a plurality of mounting plates are fixedly mounted on the side wall of the slide, a plurality of conical anti-blocking rods are fixedly mounted on the surface of the mounting plate, the plurality of anti-blocking rods respectively correspond to the positions of the plurality of filter holes on the surface of the filter screen, and the slide is restricted in rotation by a restriction component.

[0009] Preferably, the limiting component includes a plurality of limiting grooves circumferentially opened on the inner wall of the air intake pipe, and one ends of the plurality of mounting plates are respectively slidably disposed in the plurality of limiting grooves.

[0010] Preferably, a cleaning component is provided on the surface of the scraper bar, and the cleaning component is used to scrape off dust and impurities attached to the side wall of the scraper bar.

[0011] Preferably, the cleaning component includes a mountain-shaped slider and a telescopic spring. A mounting groove is provided on the surface of the scraper strip. The slider is slidably arranged in the mounting groove. The surface of the slider is in sliding contact with both sides of the scraper strip. The two ends of the telescopic spring are respectively fixedly connected to the wall of the mounting groove and the surface of the slider.

[0012] Preferably, a blocking component is provided at the pipe opening of the air intake pipe, and the blocking component is used to block the pipe opening of the air intake pipe.

[0013] Preferably, the blocking component includes a T-shaped support plate fixedly installed on the side wall of the air inlet pipe orifice, two sliding rods symmetrically and horizontally fixedly installed on the side wall of the support plate, and a blocking disk. The side wall of the blocking disk is symmetrically fixedly installed with an L-shaped slide seat, and the two slide seats are respectively slidably mounted on the two sliding rods. The diameter of the blocking disk is larger than the diameter of the air inlet pipe orifice.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] 1. When the flue gas or air enters the air inlet pipe at high speed, the rotating blades will rotate with multiple scraping strips, thereby scraping off the dust and impurities attached to the surface of the filter, avoiding the accumulation of too much dust and impurities that affect the air permeability of the filter;

[0016] 2. When the rotating blades rotate, they also drive the reciprocating screw to rotate. Multiple anti-blocking rods will intermittently insert into multiple filter holes on the surface of the filter, thereby pushing out the impurities and dust in the filter holes, improving the effect of cleaning the filter;

[0017] 3. When the scraper is rotating, the slider will slide to the end of the installation slot under the action of centrifugal force. When the scraper stops rotating, the slider will quickly move back to its original position under the elastic potential energy of the telescopic spring. During the reset process, the slider will scrape off the dust and impurities attached to the side wall of the scraper, thus avoiding the accumulation of dust and impurities on the side of the scraper, which will affect the cleaning effect of the scraper on the filter surface.

[0018] 4. When the device is not needed, the sealing disk can be controlled to move horizontally so that the sealing disk can seal the opening of the air intake pipe to prevent the opening of the air intake pipe from being in an open state all the time, which makes it easy for dust and impurities in the outside world to enter through the opening of the air intake pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front three-dimensional structure of a spoiler-cast iron pipe combined air preheater proposed in the utility model;

[0020] Figure 2 This is a schematic diagram of the back three-dimensional structure of a spoiler-cast iron tube combined air preheater proposed in the utility model;

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the scraper in the spoiler-cast iron tube combined air preheater proposed by the present invention;

[0022] Figure 4 for Figure 1 A magnified view of the structure at center A;

[0023] Figure 5 for Figure 2 A magnified view of the structure at point B in the middle;

[0024] Figure 6 for Figure 3 Enlarged view of the structure at point C in the middle.

[0025] In the figure: 1 air intake pipe, 2 filter screen, 3 rotating rod, 4 rotating blade, 5 scraper, 6 reciprocating screw, 7 slide plate, 8 mounting plate, 9 anti-blocking rod, 10 slide seat, 11 limiting groove, 12 slider, 13 telescopic spring, 14 support plate, 15 slide rod, 16 blocking disk. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] The terms "upper", "lower", "left", "right", "middle" and "one" used in the present invention are only for the convenience of description and are not intended to limit the scope of application of the present invention. Changes or adjustments to their relative relationships shall be deemed to be within the scope of application of the present invention without substantially changing the technical content.

[0028] Reference Figures 1-6 A spoiler-cast iron pipe combined air preheater includes an air inlet pipe 1, a filter screen 2 is fixedly installed in the air inlet pipe 1, a circular opening is opened at the center of the filter screen 2, a rotating rod 3 is rotatably installed in the circular opening, a rotating blade 4 is fixedly sleeved on the rotating rod 3, and a scraper 5 is fixedly installed on the surface of the rotating rod 3 in a circular shape, and the scraper 5 is in sliding contact with the surface of the filter screen 2.

[0029] A reciprocating screw rod 6 is fixedly installed at one end of the rotating rod 3, and a slide plate 7 is threadedly connected to the reciprocating screw rod 6. A plurality of mounting plates 8 are fixedly installed on the side wall of the slide plate 7. A plurality of conical anti-blocking rods 9 are fixedly installed on the surface of the mounting plate 8. The maximum diameter of the anti-blocking rod 9 is smaller than the diameter of the filter hole. The plurality of anti-blocking rods 9 respectively correspond to the positions of the plurality of filter holes on the surface of the filter screen 2. The rotation of the slide plate 7 is restricted by a restricting component. The restricting component includes a plurality of restricting grooves 11 that are circumferentially opened on the inner wall of the intake pipe 1. One ends of the plurality of mounting plates 8 are respectively slidably arranged in the plurality of restricting grooves 11.

[0030] When smoke or air enters the air inlet pipe 1 at high speed, the rotating blades 4 will rotate together with the rotating rod 3 and the reciprocating screw 6. At this time, multiple scraping strips 5 fixedly installed on the side wall of the rotating rod 3 will also rotate together. The scraping strips 5 will slide in contact with the filter 2, thereby scraping off dust and impurities attached to the surface of the filter 2, avoiding the accumulation of too much dust and impurities that affect the air permeability of the filter 2.

[0031] At the same time, the slide plate 7 threadedly connected to the reciprocating screw 6 will also carry multiple mounting plates 8 and multiple anti-blocking rods 9 to move back and forth laterally. During the movement, the multiple anti-blocking rods 9 will intermittently enter and exit the multiple filter holes on the surface of the filter screen 2, thereby pushing the dust and impurities in the filter holes out of the filter holes. The scraper 5 can clean the surface of the filter screen 2, and the anti-blocking rod 9 can clean the filter holes of the filter screen 2, which improves the effect of cleaning the filter screen 2, and the end of the anti-blocking rod 9 will not move out of the filter hole to avoid collision with the scraper 5.

[0032] A cleaning component is provided on the surface of the scraper 5, which is used to scrape off dust and impurities attached to the side wall of the scraper 5. The cleaning component includes a mountain-shaped slider 12 and a telescopic spring 13. A mounting groove is provided on the surface of the scraper 5, and the slider 12 is slidably arranged in the mounting groove. The surface of the slider 12 is in sliding contact with both sides of the scraper 5, and the two ends of the telescopic spring 13 are fixedly connected to the wall of the mounting groove and the surface of the slider 12 respectively.

[0033] When the scraper 5 is rotating, the slider 12 located in the mounting groove will be affected by the centrifugal force and move in the direction away from the rotating rod 3, and the telescopic spring 13 will stretch. When the scraper 5 stops rotating, the slider 12 will quickly move and reset under the elastic potential energy of the telescopic spring 13. The surface of the slider 12 will slide in contact with the side of the scraper 5, scraping off the dust and impurities attached to the side wall of the scraper 5, avoiding the accumulation of too much dust and impurities on the side of the scraper 5, which affects the cleaning effect of the scraper 5 on the surface of the filter 2.

[0034] A sealing component is provided at the pipe opening of the air intake pipe 1, and the sealing component is used to seal the pipe opening of the air intake pipe 1. The sealing component includes a T-shaped support plate 14 fixedly installed on the side wall of the pipe opening of the air intake pipe 1, two sliding rods 15 and a sealing disk 16 symmetrically fixedly installed horizontally on the side wall of the support plate 14, and an L-shaped slide 10 is symmetrically fixedly installed on the side wall of the sealing disk 16. The two slides 10 are respectively slidably mounted on the two sliding rods 15. The diameter of the sealing disk 16 is larger than the diameter of the pipe opening of the air intake pipe 1.

[0035] When the device is not needed, the sealing disk 16 can be controlled to move laterally so that the sealing disk 16 can close the pipe opening of the air intake pipe 1, preventing the pipe opening of the air intake pipe 1 from being in an open state all the time, causing dust and impurities in the outside world to easily enter through the pipe opening of the air intake pipe 1.

[0036] In the present invention, when the flue gas or air enters the air inlet pipe 1 at high speed, the rotating blades 4 will rotate together with the rotating rod 3 and the reciprocating screw 6. At this time, multiple scraping strips 5 fixedly mounted on the side wall of the rotating rod 3 will also rotate together. The scraping strips 5 will slide in contact with the filter 2, thereby scraping off the dust and impurities attached to the surface of the filter 2, avoiding the accumulation of a lot of dust and impurities that affect the air permeability of the filter 2. At the same time, the slide 7 threadedly mounted on the reciprocating screw 6 will also carry multiple mounting plates 8 and multiple anti-blocking rods 9 to move back and forth laterally. During the movement, the multiple anti-blocking rods 9 will intermittently enter and exit the multiple filter holes on the surface of the filter 2, thereby pushing the dust and impurities in the filter holes out of the filter holes. The scraping strips 5 can clean the surface of the filter 2, and the anti-blocking rods 9 can clean the filter holes of the filter 2, thereby improving the effect of cleaning the filter 2.

[0037] In the present invention, unless otherwise clearly specified or limited, the terms “installed”, “connected”, “connected”, “fixed” and the like should be understood in a broad sense.

[0038] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A combined air preheater of a spoiler and a cast iron pipe, comprising an air inlet pipe (1), characterized in that: A filter screen (2) is fixedly installed in the air intake pipe (1), a circular opening is opened at the center of the filter screen (2), a rotating rod (3) is rotatably installed in the circular opening, a rotating blade (4) is fixedly sleeved on the rotating rod (3), a scraper (5) is fixedly installed on the surface of the rotating rod (3) in a circular shape, and the scraper (5) is in sliding contact with the surface of the filter screen (2); A reciprocating screw rod (6) is fixedly mounted on one end of the rotating rod (3), a slide plate (7) is threadedly sleeved on the reciprocating screw rod (6), a plurality of mounting plates (8) are fixedly mounted on the side wall of the slide plate (7), a plurality of conical anti-blocking rods (9) are fixedly mounted on the surface of the mounting plate (8), the plurality of anti-blocking rods (9) respectively correspond to the positions of a plurality of filter holes on the surface of the filter screen (2), and the slide plate (7) is restricted in rotation by a restriction component.

2. The spoiler-cast iron tube combined air preheater according to claim 1, characterized in that: The limiting component comprises a plurality of limiting grooves (11) circumferentially arranged on the inner wall of the air intake pipe (1), and one end of the plurality of mounting plates (8) is respectively slidably arranged in the plurality of limiting grooves (11).

3. The spoiler-cast iron tube combined air preheater according to claim 1, characterized in that: A cleaning component is provided on the surface of the scraper bar (5), and the cleaning component is used to scrape off dust and impurities attached to the side wall of the scraper bar (5).

4. The spoiler-cast iron tube combined air preheater according to claim 3, characterized in that: The cleaning component comprises a mountain-shaped slider (12) and a telescopic spring (13); a mounting groove is provided on the surface of the scraper (5); the slider (12) is slidably arranged in the mounting groove; the surface of the slider (12) is in sliding contact with both sides of the scraper (5); and the two ends of the telescopic spring (13) are fixedly connected to the wall of the mounting groove and the surface of the slider (12), respectively.

5. The spoiler-cast iron tube combined air preheater according to claim 1, characterized in that: A blocking component is provided at the pipe opening of the air intake pipe (1), and the blocking component is used to block the pipe opening of the air intake pipe (1).

6. The spoiler-cast iron tube combined air preheater according to claim 5, characterized in that: The blocking component comprises a T-shaped support plate (14) fixedly mounted on the side wall of the air inlet pipe (1), two sliding rods (15) symmetrically and horizontally fixedly mounted on the side wall of the support plate (14), and a blocking disk (16); an L-shaped sliding seat (10) is symmetrically and fixedly mounted on the side wall of the blocking disk (16); the two sliding seats (10) are respectively slidably mounted on the two sliding rods (15); and the diameter of the blocking disk (16) is larger than the diameter of the air inlet pipe (1) at the pipe mouth.

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