Novel centrifugal fan blade hoist puller

Abstract

The utility model discloses a novel centrifugal fan wind blade hoist puller, including hydraulic transmission pump, connecting screw rod, fixed sleeve, extension jacks, fixed connecting piece etc, cancel the structure such as grab hook of puller in prior art, through fixed sleeve and connecting screw rod cooperation, make hoist pull -out operation easy, and it is convenient and stable to center, can effectively reduce the work load of operating personnel, improve work efficiency.

Description

Technical Field

[0001] This utility model relates to centrifugal fan blade lifting equipment, specifically to a novel centrifugal fan blade lifting puller. Background Technology

[0002] Centrifugal fans require periodic maintenance during operation. Due to the large and heavy blades of centrifugal fans, a puller is typically used for disassembly and installation to ensure safety. Currently, most pullers are three-jaw designs, with large hooks, unstable centers of gravity, and inconvenient operation, requiring multiple people to work together. In special environments, such as when the support gap is small, the puller's hook support becomes extremely difficult, severely impacting work efficiency. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a new type of centrifugal fan blade lifting puller with a reasonable structural design.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A novel centrifugal fan blade lifting device includes a hydraulic transmission pump, a connecting screw, a fixed sleeve, an extension rod, and a fixed connecting plate. The hydraulic transmission pump has a handle at its top and a connecting screw at its bottom. A hydraulic jack passes through the connecting screw and moves up and down relative to it. The top of the hydraulic jack is driven up and down by the hydraulic transmission pump. The fixed sleeve has an internal thread that mates with the external thread on the outer wall of the connecting screw. An extension rod is installed inside the fixed sleeve, below the connecting rod, and moves up and down relative to the fixed sleeve. The fixed connecting plate is fixedly connected to the bottom of the fixed sleeve. The bottom of the extension rod passes through an opening at the bottom of the fixed sleeve and vertically through the middle of the fixed connecting plate. Fixed connecting plate connecting holes are provided on the fixed connecting plate, on both sides of the extension rod, penetrating the upper and lower parts of the fixed connecting plate.

[0006] Preferably, an expansion bolt is screwed into each of the two fixed connecting plate connection holes. An expansion connecting plate is connected to the bottom of the fixed connecting plate via the two expansion bolts. Similarly, a through hole is provided in the middle of the expansion connecting plate, penetrating its upper and lower parts and allowing the main body of the extension rod to pass through. Expansion connecting plate connection holes are also provided on both sides of the through hole, penetrating the upper and lower parts of the expansion connecting plate. The expansion connecting plate is used to match the hole spacing of different fan blade lifting holes.

[0007] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0008] This invention eliminates the hook and other structures found in existing pullers. By using a fixed sleeve and connecting screw, lifting and pulling operations are easy, and centering is convenient and stable, effectively reducing the workload of operators and improving work efficiency. In practical use, the fixed connecting piece or extension connecting piece is fixed above the centrifugal fan blades to be disassembled using ordinary bolts. Then, the connecting screw is manually adjusted until it contacts the head of the extension jack. Pressure is then applied to cause the hydraulic jack to press down against the extension jack, which in turn presses down against other parts of the centrifugal fan. The fixed connecting piece or extension connecting piece pulls the centrifugal fan blades, ultimately detaching them from the fan. The hydraulic pressure is then released. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model;

[0010] The components are: 1. Handle; 2. Hydraulic transmission pump; 3. Return oil switch; 4. Connecting screw; 5. Hydraulic push rod; 6. Fixing sleeve; 7. Extension push rod; 8. Fixing connecting plate connecting hole; 9. Fixing connecting plate; 10. Extension bolt; 11. Extension connecting plate extension hole; 12. Extension connecting plate connecting hole; 13. Extension connecting plate. Detailed Implementation

[0011] The present invention will now be further described with reference to the accompanying drawings. Any parts not detailed below are based on existing technology in the field.

[0012] like Figure 1As shown, this utility model discloses a novel centrifugal fan blade lifting device, comprising a hydraulic transmission pump 2, a connecting screw 4, a fixing sleeve 6, an extension rod 7, and a fixing connecting piece 9. The hydraulic transmission pump 2 has a handle 1 fixedly connected to its top end and the connecting screw 4 connected to its bottom end. The connecting screw 4 has external threads on its outer wall and a central hole penetrating its upper and lower parts. The hydraulic push rod 5 of the hydraulic transmission pump 2 (i.e., an axial piston pump) (the top of the hydraulic push rod 5 is fixedly connected to the plunger of the hydraulic transmission pump 2) extends downwards into the central hole of the connecting screw 4. The hydraulic push rod 5 moves up and down relative to the central hole of the connecting screw 4. The fixing sleeve 6 has internal threads on its inner wall, which engage with the external threads on the outer wall of the connecting screw 4. The device is connected by rotation. The connecting screw 4 can move up and down within the fixed sleeve 6 to position it at a suitable height. An extension rod 7 is installed within the fixed sleeve 6 and below the connecting screw 4. The extension rod 7 moves up and down relative to the fixed sleeve 6. The extension rod 7 is a T-shaped cylinder consisting of a head and a main body. The outer diameter of the head of the extension rod 7 is larger than the inner diameter of the bottom opening of the fixed sleeve 6. The bottom of the main body of the extension rod 7 passes through the bottom opening of the fixed sleeve 6 and vertically through the through hole of the fixed connecting piece 9. The fixed connecting piece 9 is fixedly connected to the bottom of the fixed sleeve 6. A through hole for the extension rod 7 is provided in the center of the fixed connecting piece 9. Fixed connecting piece connecting holes 8 are provided on the fixed connecting piece 9 on both sides of the extension rod 7, penetrating the upper and lower parts of the fixed connecting piece 9. The hydraulic transmission pump 2, connecting screw 4, fixed sleeve 6, extension rod 7, fixed connecting piece 9, and hydraulic push rod 5 are coaxially arranged. The fan blade can be directly connected to the fixed connecting piece 9 using ordinary bolts.

[0013] An expansion bolt 10 is screwed into each of the two fixed connecting plate connecting holes 8, connecting the fixed connecting plate 9 and the expansion connecting plate 13 through the two expansion bolts 10. Similarly, a through hole is provided in the middle of the expansion connecting plate 13, penetrating its upper and lower parts and allowing the main body of the extension rod 7 to pass through. Expansion connecting plate connecting holes 12 are provided on both sides of the through hole in the expansion connecting plate 13, penetrating its upper and lower parts. The spacing between the two expansion connecting plate connecting holes 12 is consistent with the spacing of the lifting holes of the fan blade to be lifted. The fan blade is connected to the expansion connecting plate 13 using ordinary bolts. The expansion connecting plate 13 is used to match the different lifting hole spacings of the fan blades.

[0014] In use, fix the fixing sleeve 6 to the side or top of the centrifugal fan blades to be disassembled, then manually adjust the connecting screw 4 until the connecting screw 4 contacts the head of the extension rod 7, then lock the return oil switch, press the handle to start the hydraulic transmission pump 2, press up so that the hydraulic rod 5 pushes down against the extension rod 7, and the extension rod 7 then pushes down against other parts of the centrifugal fan, fix the connecting piece or the extension connecting piece to pull the centrifugal fan blades, so that the blades can finally be removed from the fan, and then open the return oil switch to release the hydraulic pressure.

[0015] After the application of this utility model, the lifting of small centrifugal fan blades and other small fan blades can be carried out by a single person, reducing the number of people required for operation by at least one. Fan blade maintenance is required approximately every 20 days per year, with about four work points. This reduces the number of workers by four per day, saving 14,400 yuan in labor costs based on a labor cost of 180 yuan per day.

Claims

1. A novel centrifugal fan blade lifting device, characterized in that, The device includes a hydraulic transmission pump, a connecting screw, a fixed sleeve, an extension rod, and a fixed connecting plate. The hydraulic transmission pump has a handle at its top and a connecting screw at its bottom. A hydraulic jack passes through the connecting screw and moves up and down relative to it. The hydraulic jack is driven by the hydraulic transmission pump. The fixed sleeve has an internal thread that mates with the external thread on the outer wall of the connecting screw. An extension rod is installed inside the fixed sleeve, below the connecting rod, and moves up and down relative to the fixed sleeve. The fixed connecting plate is fixedly connected to the bottom of the fixed sleeve. The bottom of the extension rod passes through an opening at the bottom of the fixed sleeve and vertically through the middle of the fixed connecting plate. Fixed connecting plate connection holes are provided on both sides of the extension rod, penetrating the upper and lower parts of the fixed connecting plate.

2. The novel centrifugal fan blade lifting device according to claim 1, characterized in that, An expansion bolt is screwed into each of the two fixed connecting plate connection holes. An expansion connecting plate is connected to the bottom of the fixed connecting plate via the two expansion bolts. Similarly, a through hole is provided in the middle of the expansion connecting plate, penetrating its upper and lower parts and allowing the main body of the extension rod to pass through. Expansion connecting plate connection holes are also provided on both sides of the through hole, penetrating the upper and lower parts of the expansion connecting plate. The expansion connecting plates are used to match the different lifting hole spacings of the fan blades.

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