Economizer pipe heat insulation device

Abstract

The utility model relates to the technical field of boiler economizers, in particular to an economizer pipe heat insulation device which comprises an air channel barrel and an economizer, the economizer is fixedly connected into the air channel barrel, and an adjusting assembly used for adjusting airflow is arranged on one side of the economizer. The adjusting assembly comprises a plurality of adjusting plates rotationally connected to the interior of the air channel barrel and a plurality of flow guide plates fixedly connected to the interior of the air channel barrel. By means of the adjusting assembly, before boiler tail smoke passes through the economizer, by adjusting the angle of the adjusting plate, the size of tail smoke airflow can be easily and rapidly adjusted, no part needs to be replaced, the adjusting flexibility and efficiency are greatly improved, meanwhile, it is guaranteed that the airflow is kept smooth and evenly distributed when passing through the economizer, and the boiler tail smoke is prevented from entering the economizer. According to the design, the economizer can adapt to airflow requirements under different working conditions, and the heat exchange effect is optimized.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler economizers, in particular to an economizer tube insulation device. Background Art

[0002] An economizer is a device installed at the lower part of the flue at the rear of the boiler to recover the waste heat of the exhaust gas. It heats the boiler feed water into a heating surface of saturated water under drum pressure. Because it absorbs the heat of high-temperature flue gas, it reduces the exhaust temperature of the flue gas, saves energy and improves efficiency, so it is called an economizer.

[0003] In the prior art, for example, the "Economizer Tube Insulation Device" with the announcement number CN215675145U comprises: a plurality of plywoods arranged in parallel, with gaps between adjacent plywoods, and the ends of the plurality of plywoods fixedly connected; a plurality of economizer tubes, the economizer tubes being located in the gaps; and a heat insulation layer, the heat insulation layer being located between the economizer tubes and the plywoods. Although this technology can appropriately adjust the heating area of ​​the economizer according to the actual working conditions of the boiler, so that the economizer can operate normally under the new working conditions, this technology still has some defects in actual application: this technology uses the heat insulation layer and the plywood to adjust the economizer. Heating area, however, this design exposes significant disadvantages in actual application. Since the insulation layer and the splint are fixed on the outside of the economizer, when the heating area needs to be adjusted, the entire splint and insulation layer have to be replaced. This process is not only tedious and time-consuming, but also greatly affects work efficiency and increases maintenance costs. More importantly, the excessive design of the insulation layer has caused excessive insulation inside the economizer to a certain extent, hindering the effective transfer of heat, making it difficult for the water inside the economizer to fully absorb heat, which in turn causes problems such as slow water temperature rise, reduced thermal efficiency and poor water circulation. Utility Model Content

[0004] In view of this, the purpose of the present invention is to propose an economizer tube insulation device to solve the problem that the existing economizer insulation device cannot flexibly adjust the economizer heating area and affects the effective heat transfer of the economizer.

[0005] Based on the above-mentioned purpose, the utility model provides an economizer tube insulation device, including an air duct tube and an economizer, the air duct tube is fixedly connected to the economizer, and an adjustment component for adjusting the airflow size is provided on one side of the economizer, the adjustment component includes a plurality of adjustment plates rotatably connected to the inside of the air duct tube and a plurality of guide plates fixedly connected to the inside of the air duct tube, the positions of one end of the plurality of guide plates are respectively located in the middle between the plurality of adjustment plates, the top of the middle part of the adjustment plate is fixedly connected to the central axis, the bottom of the plurality of adjustment plates is in contact with the bottom of the air duct tube, the top of the central axis is rotatably connected to the top of the air duct tube, the top of one end of the adjustment plate is fixedly connected to the connecting shaft, the top of the connecting shaft is rotatably connected to the connecting plate, the connecting plate is rotatably connected to the connecting rod away from the top of one end of the connecting shaft, the top of the plurality of connecting rods is fixedly connected to the adjusting rod, the connecting plate is inclined at an angle to the adjustment plate in the initial state, and a filter component is installed on one side of the adjustment plate, the filter component is used to filter the airflow before passing through the adjustment plate.

[0006] Preferably, the guide plates have an arc-shaped outer shape, and one end of the plurality of guide plates is located on one side of the economizer, and the plurality of adjustment plates have an arc-shaped outer shape.

[0007] Preferably, a connecting hole is provided at the top of the airway tube, an L-shaped plate is slidably engaged inside the connecting hole, an alignment plate is fixedly connected to the bottom of the L-shaped plate, the bottom of the alignment plate is fixedly connected to the bottom of the adjusting rod, and the length of the alignment plate is greater than the length of the connecting hole.

[0008] Preferably, a placement groove is provided inside the top of the airway tube, one end of the placement groove is communicated with the inside of the connecting hole, a positioning spring is fixedly connected to the inside of the placement groove, a positioning rod is fixedly connected to one side of the bottom of the L-shaped plate, and the end of the positioning rod away from the L-shaped plate is fixedly connected to the inside of one end of the positioning spring.

[0009] Preferably, a positioning block is fixedly connected to the top of the airway tube, and a plurality of V-shaped grooves are equidistantly opened on the top of the positioning block. The top of the positioning block is arc-shaped after the V-shaped grooves are opened. A connecting tube is fixedly connected to one side of the top of the L-shaped plate, and a telescopic rod is slidably engaged at the bottom of the connecting tube. The bottom of the telescopic rod is connected to a roller through an axial rotation. A first spring is fixedly connected to the inside of the connecting tube, and one end of the first spring is fixedly connected to one end of the telescopic rod. When the roller contacts the inside of the V-shaped groove, the first spring is in a rebound state.

[0010] Preferably, the acting force of the first spring is greater than the acting force of the positioning spring.

[0011] Preferably, a baffle box is fixedly connected to the top of the inside of the airway tube, the baffle box is sleeved on the outside of the central axis, and the bottom of the baffle box is in contact with the top of the adjustment plate.

[0012] Preferably, the filter assembly includes a filter plate fixedly connected to the inside of the airway tube, a plurality of holes are opened inside the filter plate, the filter plate is located on the side of the adjustment plate away from the guide plate, and a guide plate is fixedly connected to the top of the inside of the airway tube. The shape of the guide plate is arc-shaped, and one end of the guide plate is fixedly connected to the top of one side of the filter plate.

[0013] Preferably, a collection box is fixedly connected to the bottom of one side of the filter plate, the bottom of the filter plate is inclined, an output hole is provided at the bottom of the side wall of the airway tube, the position of the output hole is connected to the output end of the collection box, and a baffle is clamped inside the output hole.

[0014] Preferably, a resist rod is slidingly connected to the inside of one side of the airway tube, one end of the resist rod is fixedly connected to one side of the baffle, a fixing plate is fixedly connected to one side of the inside of the airway tube, a connecting ring is fixedly connected to the bottom of the fixing plate away from one end of the airway tube, the inside of the connecting ring is sleeved on the outside of the resist rod, the outside of the resist rod away from one end of the baffle is fixedly connected to the resist ring, one side of the resist ring is fixedly connected to a return spring, the return spring is sleeved on the outside of the resist rod, and one end of the return spring away from the resist ring is fixedly connected to one side of the connecting ring.

[0015] Beneficial effects of the utility model:

[0016] 1. By setting up an adjustment component, before the boiler tail smoke passes through the economizer, the size of the tail smoke airflow can be easily and quickly adjusted by adjusting the angle of the adjustment plate without replacing any parts, which greatly improves the flexibility and efficiency of the adjustment. At the same time, it ensures that the airflow remains smooth and evenly distributed when passing through the economizer, reducing eddy currents and resistance. This design not only enables the economizer to adapt to the airflow requirements under different working conditions, but also optimizes the heat exchange effect. At the same time, the design of the arc-shaped guide plate and the arc-shaped adjustment plate cooperating with each other also contributes to the smooth transition of the airflow, further enhancing the heat exchange performance, thereby avoiding the problem of insufficient energy absorption by the economizer in traditional insulation devices.

[0017] By setting up the filter assembly, the impurities carried in the boiler exhaust gas are filtered out through the filter plate before the air flow passes through the adjustment plate, thereby avoiding the impurities being adsorbed on the inner wall of the adjustment plate and the inner wall of the economizer, which may affect the adjustment of the adjustment plate and the energy absorption of the economizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 A in the middle is an enlarged structural diagram;

[0021] Figure 3 This is a schematic diagram of the internal three-dimensional structure of the airway tube of the utility model;

[0022] Figure 4 This is an enlarged three-dimensional structural diagram of the regulating plate and the filter plate of the utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the guide plate and the adjustment plate in cooperation with each other in the utility model;

[0024] Figure 6 This is a schematic diagram of the cross-sectional structure of the top side of the airway tube of the utility model;

[0025] Figure 7 This is a schematic diagram of the connection structure between the collection box and the filter plate of the utility model.

[0026] The following are marked in the figure:

[0027] 1. Airway tube; 2. Economizer; 3. Adjustment plate; 4. Center axis; 5. Connecting shaft; 6. Connecting plate; 7. Connecting rod; 8. Adjustment rod; 9. Guide plate; 10. Filter plate; 11. Drain plate; 12. Baffle box; 13. Connecting hole; 14. Placement slot; 15. Positioning spring; 16. Positioning rod; 17. Alignment plate; 18. L-shaped plate; 19. Connecting tube; 20. Telescopic rod; 21. Positioning block; 22. V-shaped groove; 23. Roller; 24. Collecting box; 25. Baffle; 26. Baffle rod; 27. Return spring; 28. Fixing plate; 29. ​​Connecting ring; 30. Baffle ring. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0029] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the usual meanings understood by people with ordinary skills in the field to which this utility model belongs. The "first", "second" and similar words used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0030] As the utility model Figures 1 to 7 The figure shows an economizer tube insulation device, comprising an air duct tube 1 and an economizer 2, the air duct tube 1 is fixedly connected to the economizer 2, and an adjustment component for adjusting the airflow size is provided on one side of the economizer 2, the adjustment component comprises a plurality of adjustment plates 3 rotatably connected to the air duct tube 1 and a plurality of guide plates 9 fixedly connected to the air duct tube 1, one end of the plurality of guide plates 9 is respectively located in the middle between the plurality of adjustment plates 3, the top of the middle part of the adjustment plate 3 is fixedly connected to the central shaft 4, the bottoms of the plurality of adjustment plates 3 are in contact with the bottom of the air duct tube 1, the top of the central shaft 4 is rotatably connected to the top of the air duct tube 1, the top of one end of the adjustment plate 3 is fixedly connected to the connecting shaft 5, the top of the connecting shaft 5 is rotatably connected to the connecting plate 6, the top of the connecting plate 6 is rotatably connected to the connecting rod 7 away from the top of the end of the connecting shaft 5, the tops of the plurality of connecting rods 7 are fixedly connected to the adjusting rod 8, the connecting plate 6 is inclined at an initial state, and a filter component is installed on one side of the adjustment plate 3, the filter component is used to filter the airflow before passing through the adjustment plate 3;

[0031] By setting up an adjustment component, before the boiler tail smoke passes through the economizer 2, the size of the tail smoke airflow can be easily and quickly adjusted by adjusting the angle of the adjustment plate 3 without replacing any parts, which greatly improves the flexibility and efficiency of the adjustment. At the same time, it ensures that the airflow remains smooth and evenly distributed when passing through the economizer 2, reducing eddy currents and resistance. This design not only enables the economizer 2 to adapt to the airflow requirements under different working conditions, but also optimizes the heat exchange effect. At the same time, the design of the arc-shaped guide plate 9 and the arc-shaped adjustment plate 3 cooperating with each other also contributes to the smooth transition of the airflow, further enhancing the heat exchange performance, thereby avoiding the problem of insufficient energy absorption by the economizer 2 in traditional insulation devices.

[0032] like Figures 1 to 5As shown, the guide plate 9 has an arc shape, and one end of the multiple guide plates 9 is located on one side of the economizer 2, and the multiple adjustment plates 3 have an arc shape;

[0033] By setting multiple adjustment plates 3 and multiple guide plates 9, when adjusting the airflow, the adjustment rod 8 is first moved to prompt the connecting rod 7 to move with the connecting plate 6. At this time, the adjustment plate 3 will rotate with the central axis 4 as the center through the central axis 4 limit. While rotating, one end of the adjustment plate 3 will move to one side of the guide plate 9. At this time, the gap between the adjustment plate 3 and the guide plate 9 will become smaller. At this time, when the filtered tail smoke airflow passes through the inside of the adjustment plate 3, it will become smaller, thereby prompting the adjustment plate 3 to reduce the distance between the guide plate 9 and the tail smoke when the tail smoke is insufficient, so as to make the tail smoke more The concentrated input is added to the outside of the economizer 2 for heating, thereby improving the heat exchange effect of the economizer 2. At the same time, when the tail smoke is too large, the adjusting rod 8 is pushed to prompt the connecting plate 6 to push the adjusting plate 3 to rotate around the central axis 4. At this time, one end of the adjusting plate 3 will be away from one side of the guide plate 9. At this time, the gap between one end of the adjusting plate 3 and the guide plate 9 will become larger, prompting the tail smoke to be distributedly input to the outside of the economizer 2, thereby avoiding the problem of gasification of the economizer 2 when the tail smoke is too concentratedly input, and also avoiding the problem of concentrated damage to the economizer 2 by the tail smoke with excessive temperature.

[0034] like Figures 1 to 6 As shown, a connecting hole 13 is provided on the top of the airway tube 1, and an L-shaped plate 18 is slidably engaged with the interior of the connecting hole 13. The bottom of the L-shaped plate 18 is fixedly connected to a positioning plate 17, and the bottom of the positioning plate 17 is fixedly connected to the bottom of the adjusting rod 8. The length of the positioning plate 17 is greater than the length of the connecting hole 13. A placement groove 14 is provided inside the top of the airway tube 1, and one end of the placement groove 14 is connected to the interior of the connecting hole 13. A positioning spring 15 is fixedly connected to the interior of the placement groove 14. A positioning rod 16 is fixedly connected to one side of the bottom of the L-shaped plate 18, and the end of the positioning rod 16 away from the L-shaped plate 18 is fixedly connected to the interior of one end of the positioning spring 15. A positioning block 21 is fixedly connected to the top of the airway tube 1. A plurality of V-shaped grooves 22 are equidistantly opened on the top of the positioning block 21. The top of the positioning block 21 is arc-shaped after the V-shaped grooves 22 are opened. A connecting tube 19 is fixedly connected to one side of the top of the L-shaped plate 18. A telescopic rod 20 is slidably engaged at the bottom of the connecting tube 19. A roller 23 is connected to the bottom of the telescopic rod 20 through an axis of rotation. A first spring is fixedly connected to the inside of the connecting tube 19. One end of the first spring is fixedly connected to one end of the telescopic rod 20. When the roller 23 contacts the inside of the V-shaped groove 22, the first spring is in a rebound state, and the acting force of the first spring is greater than the acting force of the positioning spring 15.

[0035] By setting the positioning block 21 and the L-shaped plate 18, when the positioning block 21 is in place, the L-shaped plate 18 is first toggled, causing the L-shaped plate 18 to move with the alignment plate 17 and the adjusting rod 8 on the top of the airway tube 1. At the same time, when the L-shaped plate 18 is moving, the roller 23 at the bottom of the telescopic rod 20 will move along the track of the positioning block 21. When the roller 23 moves to the top of the positioning block 21, the telescopic rod 20 will contract against the first spring inside the connecting tube 19. Then, when the roller 23 moves from the top of the positioning block 21 to the inside of the next V-shaped groove 22, the first spring inside the connecting tube 19 will rebound, causing the telescopic rod 20 to press against the roller 23 to be squeezed into the inside of the V-shaped groove 22, thereby causing the position of the L-shaped plate 18 to be fixed. The multiple V-shaped grooves 22 set up can start the function of adjusting the position of the L-shaped plate 18, which is convenient and quick. At the same time, by setting the top of the positioning block 21 to be arc-shaped and the roller 23, it is convenient to slide the roller 23 on the positioning block 21. At the same time, by setting the length of the alignment plate 17 to be greater than the length of the connecting hole 13, when the L-shaped plate 18 moves with the adjusting rod 8, the alignment plate 17 can always cover the bottom of the connecting hole 13, thereby avoiding the problem of smoke inside the airway tube 1 spreading outward. At the same time, through the positioning spring 15 and the positioning rod 16, when the L-shaped plate 18 moves toward one end of the placement groove 14, the positioning rod 16 will squeeze the positioning spring 15 to contract, thereby achieving the effect of stabilizing the movement of the L-shaped plate 18.

[0036] like Figures 1 to 3 As shown, the top of the airway tube 1 is fixedly connected to a baffle box 12, which is sleeved on the outside of the central shaft 4, and the bottom of the baffle box 12 is in contact with the top of the adjustment plate 3;

[0037] The baffle box 12 is provided to cover the top of the regulating plate 3 , thereby preventing the flue gas from flowing from the top of the regulating plate 3 to the economizer 2 .

[0038] like Figures 1 to 7As shown, the filter assembly includes a filter plate 10 fixedly connected to the inside of the airway tube 1, and a plurality of holes are opened inside the filter plate 10. The position of the filter plate 10 is located on the side of the adjustment plate 3 away from the guide plate 9. The top of the airway tube 1 is fixedly connected with a guide plate 11. The shape of the guide plate 11 is arc-shaped, and one end of the guide plate 11 is fixedly connected to the top of one side of the filter plate 10. The bottom of one side of the filter plate 10 is fixedly connected with a collection box 24. The bottom of the filter plate 10 is inclined. An output hole is opened at the bottom of the side wall of the airway tube 1. The position of the output hole is connected to the output end of the collection box 24, and a baffle is clamped inside the output hole. 25, a resisting rod 26 is slidably engaged with the inner side of one side of the airway tube 1, one end of the resisting rod 26 is fixedly connected to one side of the baffle 25, a fixing plate 28 is fixedly connected to one side of the inner side of the airway tube 1, a connecting ring 29 is fixedly connected to the bottom of the fixing plate 28 away from the end of the airway tube 1, the inner side of the connecting ring 29 is sleeved on the outer side of the resisting rod 26, and a resisting ring 30 is fixedly connected to the outer side of the end of the resisting rod 26 away from the baffle 25, and a return spring 27 is fixedly connected to one side of the resisting ring 30, the return spring 27 is sleeved on the outer side of the resisting rod 26, and the end of the return spring 27 away from the resisting ring 30 is fixedly connected to one side of the connecting ring 29;

[0039] Through the provided filter assembly, before the airflow passes through the regulating plate 3, the impurities carried in the boiler exhaust gas are filtered out through the barrier of the filter plate 10, thereby avoiding the impurities being adsorbed on the inner wall of the regulating plate 3 and the inner wall of the economizer 2, which may affect the regulation of the regulating plate 3 and the energy absorption of the economizer 2. Afterwards, when the impurities on one side of the filter plate 10 accumulate to a certain weight, they will fall off from one side of the filter plate 10 to the inside of the collection box 24 for collection. At the same time, the impurities accumulated inside the collection box 24 will move to the lowest end of the collection box 24. After that, when a certain amount is accumulated, the resisting rod 26 is pushed to prompt the baffle 25 to move away from the side wall of the airway tube 1. At this time, the impurities inside the collection box 24 will automatically roll out of the inside of the airway tube 1. Through the provided return spring 27, when the resist rod 26 is pushed, the resist ring 30 will squeeze the return spring 27 to shrink to one side of the connecting ring 29. After that, when the impurities inside the collecting box 24 roll out, the resist rod 26 is released, prompting the return spring 27 to automatically rebound, prompting the return spring 27 to push the resist ring 30 and bring the resist rod 26 back to its original position. At the same time, the baffle 25 will return to the inside of the output hole on the side wall of the airway tube 1 again. At the same time, through the provided guide plate 11, when the airflow moves from the top of the inside of the airway tube 1, the guide plate 11 is set in an arc shape, prompting the guide plate 11 to input the boiler tail smoke into the inside of the filter plate 10, which not only facilitates the filtration of the flue gas, but also facilitates the later adjustment of the flue gas.

[0040] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0041] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An economizer tube insulation device, comprising an airway tube (1) and an economizer (2), wherein the economizer (2) is fixedly connected to the interior of the airway tube (1), characterized in that: One side of the economizer (2) is provided with an adjustment component for adjusting the size of the airflow, and the adjustment component includes a plurality of adjustment plates (3) rotatably connected to the inside of the airway tube (1) and a plurality of guide plates (9) fixedly connected to the inside of the airway tube (1), one end of the plurality of guide plates (9) is respectively located in the middle between the plurality of adjustment plates (3), the top of the middle of the adjustment plate (3) is fixedly connected to the central shaft (4), the bottom of the plurality of adjustment plates (3) is in contact with the bottom of the inside of the airway tube (1), the top of the central shaft (4) is rotatably connected to the top of the inside of the airway tube (1), the top of one end of the adjustment plate (3) is fixedly connected to the connecting shaft (5), the top of the connecting shaft (5) is rotatably connected to the connecting plate (6), the top of the connecting plate (6) away from the end of the connecting shaft (5) is rotatably connected to the connecting rod (7), the top of the plurality of connecting rods (7) is fixedly connected to the adjustment rod (8), and the connecting plate (6) is inclined at an angle to the adjustment plate (3) in the initial state; A filter assembly is installed on one side of the regulating plate (3), and the filter assembly is used to filter the airflow before passing through the regulating plate (3).

2. The economizer tube insulation device according to claim 1, characterized in that: The guide plates (9) have an arc-shaped outer shape, and one end of the plurality of guide plates (9) is located on one side of the economizer (2). The plurality of adjustment plates (3) have an arc-shaped outer shape.

3. The economizer tube insulation device according to claim 1, characterized in that: A connecting hole (13) is provided at the top of the airway tube (1), an L-shaped plate (18) is slidably engaged inside the connecting hole (13), an alignment plate (17) is fixedly connected to the bottom of the L-shaped plate (18), the bottom of the alignment plate (17) is fixedly connected to the bottom of the adjustment rod (8), and the length of the alignment plate (17) is greater than the length of the connecting hole (13).

4. The economizer tube insulation device according to claim 3, characterized in that: A placement groove (14) is provided inside the top of the airway tube (1), one end of the placement groove (14) is connected to the inside of the connecting hole (13), a positioning spring (15) is fixedly connected to the inside of the placement groove (14), a positioning rod (16) is fixedly connected to one side of the bottom of the L-shaped plate (18), and an end of the positioning rod (16) away from the L-shaped plate (18) is fixedly connected to the inside of one end of the positioning spring (15).

5. The economizer tube insulation device according to claim 4, characterized in that: The top of the airway tube (1) is fixedly connected to a positioning block (21), and a plurality of V-shaped grooves (22) are opened at equal intervals on the top of the positioning block (21). The top of the positioning block (21) is arc-shaped after the V-shaped grooves (22) are opened. A connecting tube (19) is fixedly connected to one side of the top of the L-shaped plate (18). The bottom of the connecting tube (19) is slidably connected to a telescopic rod (20). The bottom of the telescopic rod (20) is connected to a roller (23) through an axis of rotation. A first spring is fixedly connected to the inside of the connecting tube (19), and one end of the first spring is fixedly connected to one end of the telescopic rod (20). When the roller (23) contacts the inside of the V-shaped groove (22), the first spring is in a rebound state.

6. The economizer tube insulation device according to claim 5, characterized in that: The acting force of the first spring is greater than the acting force of the positioning spring (15).

7. The economizer tube insulation device according to claim 6, characterized in that: The top of the airway tube (1) is fixedly connected to a baffle box (12), which is sleeved on the outside of the central shaft (4), and the bottom of the baffle box (12) is in contact with the top of the adjustment plate (3).

8. The economizer tube insulation device according to claim 1, characterized in that: The filter assembly includes a filter plate (10) fixedly connected to the inside of the airway tube (1), a plurality of holes are provided inside the filter plate (10), the filter plate (10) is located on the side of the adjustment plate (3) away from the guide plate (9), and a guide plate (11) is fixedly connected to the top of the inside of the airway tube (1), the guide plate (11) has an arc shape, and one end of the guide plate (11) is fixedly connected to the top of one side of the filter plate (10).

9. The economizer tube insulation device according to claim 8, characterized in that: A collecting box (24) is fixedly connected to the bottom of one side of the filter plate (10), and the bottom of the filter plate (10) is inclined. An output hole is provided at the bottom of the side wall of the airway tube (1), and the position of the output hole is connected to the output end of the collecting box (24). A baffle (25) is clamped inside the output hole.

10. The economizer tube insulation device according to claim 9, characterized in that: A resisting rod (26) is slidably engaged with one side of the airway tube (1), one end of the resisting rod (26) is fixedly connected to one side of the baffle (25), and a fixing plate (28) is fixedly connected to one side of the interior of the airway tube (1). A connecting ring (29) is fixedly connected to the bottom of the fixing plate (28) away from one end of the airway tube (1), and the interior of the connecting ring (29) is sleeved on the outside of the resisting rod (26), and a resisting ring (30) is fixedly connected to the outside of the resisting rod (26) away from the baffle (25). A return spring (27) is fixedly connected to one side of the resisting ring (30), and the return spring (27) is sleeved on the outside of the resisting rod (26). The end of the return spring (27) away from the resisting ring (30) is fixedly connected to one side of the connecting ring (29).

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