Efficient heat preservation type metal expansion joint for draught fan

Abstract

The utility model relates to the technical field of fan accessories, in particular to an efficient heat preservation type metal expansion joint for a fan, which comprises a metal corrugated pipe, steel pipes are welded on two sides of the metal corrugated pipe, heat preservation cotton is sleeved on the surfaces of the steel pipes, and fixing flanges are welded on opposite sides of the steel pipes. Through cooperation of the connecting block, the frame body, the lead screw, the adjusting plate, the L-shaped plate and the limiting plate, the limiting device has the advantage of limiting function, after the fixing flange is connected with the connecting flange of the fan, the limiting plate is pulled and moved to the rear side of the connecting flange of the fan, then the lead screw is rotated, and the lead screw is in threaded connection with the adjusting plate to enable the adjusting plate to start to move, so that the fixing flange is fixed. The adjusting plate drives the L-shaped plate and the limiting plate to move, and one side of the limiting plate is in close contact with the connecting flange of the fan, so that the fixed flange and the connecting flange of the fan are limited and fixed, and the phenomenon of loosening or falling is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fan accessories, in particular to a high-efficiency heat-insulating metal expansion joint for a fan. Background Art

[0002] Large fans are a type of equipment used in a variety of industrial and commercial applications. They can handle large amounts of air or other gases. During use, large fans need to be installed with metal expansion joints to compensate for changes in the dimensions of pipes, containers and other equipment caused by temperature changes.

[0003] After searching, the patent number is CN214535061U, and the name is a utility model of a new type of metal expansion joint, including a bellows main structure. Through research and analysis, it is found that although the welding ring structure can be adjusted during use to ensure better overall connection firmness of the fixed end position, it can be adjusted as needed during use to ensure greater flexibility during installation and use, and higher convenience during use, etc. However, there are still the following disadvantages to a certain extent.

[0004] For example, it does not have a limiting function. During the use of the above device, the surface of the flange does not have a limiting structure, which leads to vibration of the fan during long-term use, causing the connection between the fan and the expansion joint to loosen or fall off, thereby affecting the subsequent medium transportation operation. In order to solve the above technical problems, we have designed a high-efficiency thermal insulation metal expansion joint for fans. Utility Model Content

[0005] The utility model aims to provide a high-efficiency heat-insulating metal expansion joint for a fan, which has the advantages of limiting and heat-insulating functions, and solves the problem that the connection between the fan and the expansion joint cannot be limited and fixed during the use of the existing expansion joint, and the medium inside the bellows cannot be insulated.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-efficiency thermal insulation metal expansion joint for a fan, comprising a metal bellows, steel pipes are welded on both sides of the metal bellows, the surface of the steel pipe is sleeved with thermal insulation cotton, a fixed flange is welded on the opposite side of the steel pipe, a limiting mechanism is welded on the front and rear sides of the fixed flange, a first guard plate is fixedly sleeved on the surface of the thermal insulation cotton on the left side, a thermal insulation cloth is riveted on the right side of the first guard plate, a second guard plate is fixedly sleeved on the surface of the thermal insulation cotton on the right side, a groove is opened on the left side of the second guard plate, a fixing ring is riveted on the right side of the thermal insulation cloth, connecting plates are welded on the top and bottom of the fixed flange, and connecting rods are movably connected through both sides of the connecting plate.

[0007] Preferably, the limiting mechanism includes a connecting block, the opposite side of the connecting block is welded to the fixed flange, the opposite side of the connecting block is welded with a frame, the opposite side of the frame is penetrated by a screw rod for movably connecting, the surface of the screw rod is threadedly sleeved with an adjusting plate, the opposite side of the adjusting plate is welded with an L-shaped plate, and the surface of the L-shaped plate is movably sleeved with a limiting plate.

[0008] Preferably, the opposite ends of the screw rod are movably connected to the inner wall of the frame through a bearing, and the opposite ends of the screw rod are welded with bolt heads.

[0009] Preferably, the top and the bottom of the second guard plate are both threadedly connected with positioning bolts, and opposite ends of the positioning bolts are in contact with the fixing ring.

[0010] Preferably, the right side of the fixing ring extends to the inner cavity of the groove, and the insulation cloth is made of glass fiber cloth.

[0011] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0012] 1. The utility model has the advantage of a limiting function through the cooperation of a connecting block, a frame, a screw, an adjusting plate, an L-shaped plate and a limiting plate. After the connection between the fixed flange and the connecting flange of the fan is completed, the limiting plate is pulled, and the limiting plate moves to the rear side of the connecting flange of the fan. Then the screw is rotated, and the screw starts to move the adjusting plate through a threaded connection with the adjusting plate. The adjusting plate drives the L-shaped plate and the limiting plate to move, and one side of the limiting plate is in close contact with the connecting flange of the fan, thereby limiting and fixing the fixed flange and the connecting flange of the fan to prevent them from loosening or falling off.

[0013] 2. The utility model has the advantage of heat preservation function through the cooperation of heat preservation cotton, first guard plate, heat preservation cloth, second guard plate, groove and fixing ring. The fixing ring is pulled to the right, and the fixing ring drives the heat preservation cloth to move to the right, and the fixing ring is moved to the inner cavity of the groove. Then the positioning bolt is tightened, and the positioning bolt limits and fixes the fixing ring. At this time, the metal bellows is located inside the heat preservation cloth. Under the action of the heat preservation cloth, the heat can be insulated so that the heat will not be lost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the structure of the utility model;

[0015] Figure 2 This is a three-dimensional diagram of the structure of the thermal insulation cloth of the utility model;

[0016] Figure 3 This is a three-dimensional diagram of the structure of the metal bellows of the utility model;

[0017] Figure 4 This is a three-dimensional diagram of the steel pipe structure of the utility model;

[0018] Figure 5 This is a three-dimensional diagram of the limiting mechanism of the utility model;

[0019] Figure 6 It is a three-dimensional left view of the local structure of the utility model.

[0020] In the figure: 1. metal bellows; 2. steel pipe; 3. thermal insulation cotton; 4. fixing flange; 5. limiting mechanism; 6. first guard plate; 7. thermal insulation cloth; 8. second guard plate; 9. groove; 10. fixing ring; 11. connecting plate; 12. connecting rod; 13. connecting block; 14. frame; 15. screw rod; 16. adjusting plate; 17. L-shaped plate; 18. limiting plate; 19. positioning bolt. DETAILED DESCRIPTION

[0021] See also Figure 1-Figure 6 A high-efficiency thermal insulation metal expansion joint for a fan comprises a metal bellows 1, steel pipes 2 are welded on both sides of the metal bellows 1, thermal insulation cotton 3 is sleeved on the surface of the steel pipe 2, a fixed flange 4 is welded on the opposite side of the steel pipe 2, a limiting mechanism 5 is welded on the front and rear sides of the fixed flange 4, a first protective plate 6 is fixedly sleeved on the surface of the thermal insulation cotton 3 on the left side, a thermal insulation cloth 7 is riveted on the right side of the first protective plate 6, a second protective plate 8 is fixedly sleeved on the surface of the thermal insulation cotton 3 on the right side, a groove 9 is opened on the left side of the second protective plate 8, a fixing ring 10 is riveted on the right side of the thermal insulation cloth 7, a connecting plate 11 is welded on the top and bottom of the fixed flange 4, and connecting rods 12 are movably connected through both sides of the connecting plate 11.

[0022] See also Figure 1 and Figure 5 The limiting mechanism 5 includes a connecting block 13, and the opposite side of the connecting block 13 is welded to the fixed flange 4, and the opposite side of the connecting block 13 is welded with a frame 14, and the opposite side of the frame 14 is penetrated by a screw rod 15 that is movably connected, and the surface thread sleeve of the screw rod 15 is provided with an adjusting plate 16. By setting the adjusting plate 16, the L-shaped plate 17 and the limiting plate 18 can be driven to move left and right, so that the flange connection can be limited and fixed to avoid loosening. The opposite side of the adjusting plate 16 is welded with an L-shaped plate 17, and the surface of the L-shaped plate 17 is movably sleeved with a limiting plate 18.

[0023] See also Figure 5 The opposite ends of the screw rod 15 are movably connected to the inner wall of the frame 14 through bearings, and the opposite ends of the screw rod 15 are welded with bolt heads. By providing the bolt heads, it is convenient for users to rotate the screw rod 15.

[0024] See also Figure 6The top and bottom of the second guard plate 8 are both threaded with positioning bolts 19. By setting the positioning bolts 19, the fixing ring 10 can be limited and fixed to prevent the fixing ring 10 from falling off. The opposite ends of the positioning bolts 19 are in contact with the fixing ring 10.

[0025] See also Figure 1 and Figure 6 The right side of the fixing ring 10 extends to the inner cavity of the groove 9. The material of the insulation cloth 7 is glass fiber cloth. By setting the insulation cloth 7, the surface of the expansion joint can be insulated to avoid heat loss.

[0026] When in use, the left side of the fixing flange 4 is fixed to the connecting flange of the fan by bolts, and then the limit plate 18 is pulled, and the limit plate 18 moves to the rear side of the connecting flange of the fan, and then the screw rod 15 is rotated, and the screw rod 15 is threadedly connected with the adjusting plate 16 to make the adjusting plate 16 start to move, and the adjusting plate 16 drives the L-shaped plate 17 and the limit plate 18 to move, and one side of the limit plate 18 is in close contact with the connecting flange of the fan, thereby limiting and fixing the fixing flange 4 and the connecting flange of the fan so that they will not loosen or fall off. When it is necessary to insulate the surface of the metal bellows 1, the fixing ring 10 is pulled to the right side, and the fixing ring 10 drives the insulation cloth 7 to move to the right side, and the fixing ring 10 is moved to the inner cavity of the groove 9, and then the positioning bolts 19 are tightened. The positioning bolts 19 limit and fix the fixing ring 10. At this time, the metal bellows 1 is located inside the insulation cloth 7. Under the action of the insulation cloth 7, the heat can be insulated so that its heat will not be lost.

[0027] To sum up: the high-efficiency thermal insulation metal expansion joint for the fan, through the cooperation of the connecting block 13, the frame 14, the screw 15, the adjusting plate 16, the L-shaped plate 17, the limiting plate 18, the thermal insulation cotton 3, the first protective plate 6, the thermal insulation cloth 7, the second protective plate 8, the groove 9 and the fixing ring 10, solves the problem that the connection between the fan and the expansion joint cannot be limited and fixed during the use of the existing expansion joint, and the medium inside the bellows cannot be insulated.

Claims

1. A high-efficiency heat-insulating metal expansion joint for a fan, comprising a metal bellows (1), characterized in that: Steel pipes (2) are welded to both sides of the metal bellows (1), and the surface of the steel pipe (2) is sleeved with thermal insulation cotton (3). A fixed flange (4) is welded to the opposite side of the steel pipe (2), and a limiting mechanism (5) is welded to the front and rear sides of the fixed flange (4). The surface of the thermal insulation cotton (3) on the left side is sleeved with a first protective plate (6), and a thermal insulation cloth (7) is riveted to the right side of the first protective plate (6). The surface of the thermal insulation cotton (3) on the right side is sleeved with a second protective plate (8), and a groove (9) is provided on the left side of the second protective plate (8). A fixing ring (10) is riveted to the right side of the thermal insulation cloth (7). Connecting plates (11) are welded to the top and bottom of the fixed flange (4), and connecting rods (12) are movably connected through both sides of the connecting plate (11).

2. The high-efficiency heat-insulating metal expansion joint for a fan according to claim 1, characterized in that: The limiting mechanism (5) comprises a connecting block (13), the opposite side of the connecting block (13) is welded to the fixed flange (4), the opposite side of the connecting block (13) is welded to a frame (14), the opposite side of the frame (14) is penetrated by a screw rod (15) movably connected, the surface of the screw rod (15) is threadedly sleeved with an adjustment plate (16), the opposite side of the adjustment plate (16) is welded to an L-shaped plate (17), and the surface of the L-shaped plate (17) is movably sleeved with a limiting plate (18).

3. The high-efficiency heat-insulating metal expansion joint for a fan according to claim 2 is characterized in that: The opposite ends of the screw rod (15) are movably connected to the inner wall of the frame (14) through a bearing, and the opposite ends of the screw rod (15) are welded with bolt heads.

4. The high-efficiency heat-insulating metal expansion joint for a fan according to claim 1, characterized in that: Positioning bolts (19) are threadedly connected to the top and bottom of the second guard plate (8), and opposite ends of the positioning bolts (19) are in contact with the fixing ring (10).

5. The high-efficiency heat-insulating metal expansion joint for a fan according to claim 1, characterized in that: The right side of the fixing ring (10) extends to the inner cavity of the groove (9), and the material of the insulation cloth (7) is glass fiber cloth.

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