Gas adjusting device of air preheater

Abstract

The utility model discloses a gas adjusting device of an air preheater, which relates to the technical field of air preheating equipment and comprises adjusting equipment and a hydrogen airbag, a driving block is arranged on the top surface of the adjusting equipment, a driving cavity is arranged in the driving block, one side wall of the driving cavity is fixedly connected with one end of the hydrogen airbag, and the other side wall of the driving cavity is fixedly connected with the other end of the hydrogen airbag. And an adjusting cavity is formed in the adjusting equipment, a first movable plate is arranged at the lower end of the adjusting cavity, and a guide rod is arranged in the adjusting cavity. The air bag, the mooring rope and the movable plate are arranged, the through hole is formed, self-adaptive blocking of the air inlet is achieved, compared with driving through a mechanical structure, the service life of the mooring rope is longer, maintenance and overhaul are more convenient, abrasion of the mooring rope in the moving process is reduced through the pulley, and the service life of the mooring rope is prolonged. And the moving fluency of the cable is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air preheating equipment, in particular to a gas regulating device of an air preheater. Background Art

[0002] The air preheater can improve and intensify combustion. The air heated by the preheater enters the furnace, which can improve and intensify the combustion in the furnace. In addition, the temperature of the hot air entering the furnace is increased, and the average temperature level in the furnace is also increased, thereby enhancing the radiation heat transfer in the furnace.

[0003] The gas regulating device of the existing air preheater has a high operating cost and cannot meet the needs in actual use, so there is an urgent need in the market for improved technology to solve the above problems.

[0004] An existing patent (publication number: CN219222477U) proposes a gas regulating structure for an air preheater, including a shielding assembly and a driving assembly. The shielding assembly is arranged in the exhaust gas discharge channel of the air preheater. The shielding assembly includes a plurality of rotatable shielding members. The driving assembly is connected to the shielding assembly. The driving assembly drives the plurality of shielding members to rotate to change the shielding area of ​​the exhaust gas flowing through. When it is necessary to increase the residence time of the exhaust gas in the air preheater, the plurality of shielding members are driven to rotate by the driving assembly.

[0005] The gas regulating structure of the above-mentioned air preheater has the following disadvantages when in use: the above-mentioned gas regulating structure blocks the air inlet through the thermal expansion and contraction of the air bag in conjunction with multiple gears and racks for transmission, but it uses multiple sets of gears and racks, which are expensive and difficult to maintain, and when it blocks the air inlet, it will be adjusted anytime and anywhere according to the amount of exhaust gas, but the gears and racks will wear as the number of transmissions increases, resulting in a decrease in its accuracy or even deformation and failure, so the above-mentioned gas regulating structure has certain limitations.

[0006] To this end, we propose a gas regulating device for an air preheater to solve the above problems. Utility Model Content

[0007] The utility model provides a gas regulating device for an air preheater, which solves the technical problem of difficult maintenance caused by complex structure.

[0008] In order to solve the above technical problems, the utility model provides a gas regulating device for an air preheater, including a regulating device and a hydrogen gas bag, wherein a driving block is arranged on the top surface of the regulating device, a driving cavity is provided in the driving block, a cavity wall on one side of the driving cavity is fixedly connected to one end of the hydrogen gas bag, a regulating cavity is provided in the regulating device, a first movable plate is arranged at the lower end of the regulating cavity, a guide rod is arranged in the regulating cavity, both sides of the first movable plate are connected to the guide rod, a first cable is fixedly connected to the hydrogen gas bag, and the other end of the first cable is fixedly connected to the first movable plate.

[0009] Preferably, a first through hole is opened on one side of the top surface of the adjusting device, a third through hole is opened on the top of the driving block, and the first cable passes through the third through hole and then passes through the first through hole again to be fixedly connected to one side of the first movable plate.

[0010] Preferably, guide sleeves are fixedly connected to both sides of the first movable plate, and the guide sleeves are only vertically slidable and sleeved on the guide rods.

[0011] Preferably, a second movable plate is provided at the upper end of the regulating chamber, the hydrogen airbag is fixedly connected to a second cable, and the other end of the second cable is fixedly connected to the second movable plate.

[0012] Preferably, a second through hole is formed on the top surface of the adjusting device, and the second cable passes through the second through hole and is fixedly connected to the second movable plate.

[0013] Preferably, pulleys are provided at the first through hole, the second through hole and the third through hole.

[0014] Preferably, the first cable and the second cable are both made of aramid fiber.

[0015] Compared with the related art, the gas regulating device of an air preheater provided by the utility model has the following beneficial effects:

[0016] In the utility model, an air bag, a cable and a movable plate are provided and a through hole is opened to realize adaptive blocking at the air inlet. Compared with using a mechanical structure for driving, the service life of the cable is longer and maintenance and inspection are more convenient. By providing a pulley, the wear of the cable during movement is reduced and the smoothness of the cable during movement is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A front view of a gas regulating device for an air preheater;

[0018] Figure 2 A rear view of a gas regulating device for an air preheater;

[0019] Figure 3The present invention is a schematic diagram of the cross-sectional structure of a gas regulating device of an air preheater.

[0020] Numbers in the figure: 1. Adjusting device; 101. Adjusting chamber; 102. First through hole; 103. Second through hole; 2. Driving block; 201. Driving chamber; 202. Third through hole; 3. Hydrogen airbag; 301. First cable; 302. Second cable; 4. First movable plate; 401. Second movable plate; 5. Guide rod; 501. Guide sleeve; 6. Pulley. DETAILED DESCRIPTION

[0021] The embodiments of the present utility model are described in detail below.

[0022] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] Example 1, reference Figure 1-3 A gas regulating device for an air preheater comprises a regulating device 1 and a hydrogen gas bag 3. A driving block 2 is arranged on the top surface of the regulating device 1. A driving cavity 201 is opened in the driving block 2. A cavity wall on one side of the driving cavity 201 is fixedly connected to one end of the hydrogen gas bag 3. The hydrogen in the hydrogen gas bag 3 will expand as the temperature rises and contract as the temperature drops. By fixedly connecting one end of the hydrogen gas bag 3 to the driving cavity 201, the hydrogen gas bag 3 will extend toward the opening direction of the driving cavity 201 when it expands when heated.

[0024] An adjusting chamber 101 is provided in the adjusting device 1, a first movable plate 4 is provided at the lower end of the adjusting chamber 101, a guide rod 5 is provided in the adjusting chamber 101, both sides of the first movable plate 4 are connected to the guide rod 5, both sides of the first movable plate 4 are fixedly connected with guide sleeves 501, the guide sleeves 501 can only be vertically slidably sleeved on the guide rod 5, by arranging the guide rod 5 at the lower end of the adjusting chamber 101, arranging the guide sleeves 501 on both sides of the first movable plate 4, and sleeved on the guide rod 5, the first movable plate 4 can only move along the setting direction of the guide rod 5, and under normal conditions, the first movable plate 4 will be at the bottom surface of the adjusting chamber 101, and the air outlet will be less blocked.

[0025] The hydrogen airbag 3 is fixedly connected with a first cable 301, and the other end of the first cable 301 is fixedly connected with the first movable plate 4. A first through hole 102 is provided on one side of the top surface of the adjustment device 1, and a third through hole 202 is provided on the top of the driving block 2. The first cable 301 passes through the third through hole 202 and then passes through the first through hole 102 again to be fixedly connected with one side of the first movable plate 4. By providing the first through hole 102 on one side of the top surface of the adjustment device 1 and providing the third through hole 202 on the top of the driving block 2, the first cable 301 is connected to the hydrogen airbag 3, and the other end of the first cable 301 passes through the third through hole 202. The first through hole 102 is fixed to the first movable plate 4, so that when the hydrogen airbag 3 expands when heated and extends to the other side of the driving chamber 201, the hydrogen airbag 3 will be away from the third through hole 202. Because the length of the first cable 301 remains unchanged, the hydrogen airbag 3 away from the third through hole 202 will make the first movable plate 4 close to the first through hole 102. Therefore, the thermal expansion and contraction of the hydrogen airbag 3 can drive the first movable plate 4 to rise or fall, and adjust according to the amount of high-temperature gas to adaptively block the air inlet. The first cable 301 and the second cable 302 are both made of aramid fiber, which has high strength, high temperature resistance and fire resistance, and can extend the service life of the device.

[0026] Embodiment 2, a gas regulating device of an air preheater, comprises a regulating device 1 and a hydrogen gas bag 3, wherein a driving block 2 is arranged on the top surface of the regulating device 1, a driving cavity 201 is provided in the driving block 2, a cavity wall on one side of the driving cavity 201 is fixedly connected to one end of the hydrogen gas bag 3, a regulating cavity 101 is provided in the regulating device 1, a first movable plate 4 is arranged at the lower end of the regulating cavity 101, a guide rod 5 is arranged in the regulating cavity 101, both sides of the first movable plate 4 are connected to the guide rod 5, a first cable 301 is fixedly connected to the hydrogen gas bag 3, and the other end of the first cable 301 is fixedly connected to the first movable plate 4.

[0027] refer to Figure 1-3The upper end of the regulating chamber 101 is provided with a second movable plate 401, the hydrogen airbag 3 is fixedly connected with a second cable 302, and the other end of the second cable 302 is fixedly connected to the second movable plate 401. Preferably, the first movable plate 4 and the second movable plate 401 are both hollow structures, which are light in weight and will not cause excessive deformation of the hydrogen airbag 3 due to weight. The top surface of the regulating device 1 is provided with a second through hole 103, and the second cable 302 passes through the second through hole 103 and is fixedly connected to the second movable plate 401. Guide sleeves 501 are also provided on both sides of the second movable plate 401, and the guide sleeves 501 are also sleeved on the guide rod 5. By providing the guide rod 5 and the guide sleeve 501, the second movable plate 4 01 is limited so that it can only move along the setting direction of the guide rod 5. A second movable plate 401 is set at the upper end of the adjusting chamber 101, and a second through hole 103 is opened on the top surface of the adjusting device 1. The second cable 302 is connected to the hydrogen airbag 3, and the other end of the second cable 302 is connected to the second movable plate 401, so that the hydrogen airbag 3 can hoist the second movable plate 401 on the top of the adjusting chamber 101, and after the hydrogen airbag 3 expands when heated, the end of the hydrogen airbag 3 equipped with the second cable 302 will be close to the second cable 302, and the length of the second cable 302 is inconvenient, so the second movable plate 401 will drop to block the air inlet. By setting the above structure, the adaptive blocking effect at the air inlet is better.

[0028] In addition, pulleys 6 are provided at the first through hole 102, the second through hole 103 and the third through hole 202. By providing the pulleys 6, the first cable 301 and the second cable 302 will no longer rub against the adjusting device 1 during operation, thereby reducing the loss of the first cable 301 and the second cable 302 and allowing the first cable 301 and the second cable 302 to move more smoothly.

[0029] Working principle: When in use, if there is too much high-temperature gas at the air inlet, the hydrogen airbag 3 will expand when it encounters heat, so that the end connected to the first cable 301 is away from the third through hole 202, and the end provided with the second cable 302 is close to the second through hole 103, driving the first movable plate 4 to rise and the second movable plate 401 to fall, thereby blocking the air inlet. The more high-temperature gas there is and the higher the temperature is, the farther the end connected to the first cable 301 is from the third through hole 202, and the closer the end connected to the second cable 302 is to the second through hole 103, the longer the blocking of the air inlet will be, thereby adaptively blocking the air inlet.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gas regulating device for an air preheater, comprising a regulating device (1) and a hydrogen gas bag (3), characterized in that: The top surface of the regulating device (1) is provided with a driving block (2), the driving block (2) is provided with a driving cavity (201), a cavity wall on one side of the driving cavity (201) is fixedly connected to one end of the hydrogen gas bag (3), the regulating device (1) is provided with a regulating cavity (101), a first movable plate (4) is provided at the lower end of the regulating cavity (101), a guide rod (5) is provided in the regulating cavity (101), both sides of the first movable plate (4) are connected to the guide rod (5), the hydrogen gas bag (3) is fixedly connected with a first cable (301), and the other end of the first cable (301) is fixedly connected to the first movable plate (4).

2. The gas regulating device of an air preheater according to claim 1, characterized in that: A first through hole (102) is provided on one side of the top surface of the adjusting device (1), a third through hole (202) is provided on the top of the driving block (2), and the first cable (301) passes through the third through hole (202) and then passes through the first through hole (102) again to be fixedly connected to one side of the first movable plate (4).

3. The gas regulating device of an air preheater according to claim 2, characterized in that: Guide sleeves (501) are fixedly connected to both sides of the first movable plate (4), and the guide sleeves (501) are sleeved on the guide rods (5) in a manner that allows them to slide vertically only.

4. The gas regulating device of an air preheater according to claim 3, characterized in that: A second movable plate (401) is provided at the upper end of the regulating chamber (101), and the hydrogen airbag (3) is fixedly connected to a second cable (302), and the other end of the second cable (302) is fixedly connected to the second movable plate (401).

5. The gas regulating device of an air preheater according to claim 4, characterized in that: A second through hole (103) is provided on the top surface of the adjusting device (1), and the second cable (302) passes through the second through hole (103) and is fixedly connected to the second movable plate (401).

6. The gas regulating device of an air preheater according to claim 5, characterized in that: Pulleys (6) are provided at the first through hole (102), the second through hole (103) and the third through hole (202).

7. The gas regulating device of an air preheater according to claim 6, characterized in that: The first cable (301) and the second cable (302) are both made of aramid fibers.

Images