Novel vertical mill roller sleeve hoisting tool

Abstract

The utility model discloses a novel vertical mill roller sleeve hoisting tool which comprises a cross beam and a lifting hook, a lifting lug is arranged in the center of the cross beam, and lifting hooks are rotationally connected to the four corners of the cross beam; the bottom of the lifting hook is a horizontal plane for supporting the lower end of the roller sleeve, one end of the tail of the lifting hook is provided with a limiting corner matched with the inner conical surface angle of the lower end of the roller sleeve, and the limiting corner is fixedly connected with one end of the horizontal plane; and when the four lifting hooks clamp the inner conical surface of the lower end of the roller sleeve, the cross beam is locked and connected with the four lifting hooks through fixing devices. The vertical mill roller sleeve hoisting tool is high in practicability, the working efficiency of replacing the roller sleeve can be improved, and the potential safety hazard of hoisting the roller sleeve is eliminated; and collision and abrasion to the outer ring of the grinding roller during hoisting are also avoided, and the construction cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vertical mill roller sleeve hoisting equipment, in particular to a novel vertical mill roller sleeve hoisting tool. Background Art

[0002] As an energy-saving, mature and stable grinding and drying equipment, vertical mill is widely used in cement industry, such as raw material vertical mill, coal powder vertical mill, mineral powder vertical mill, steel slag vertical mill, etc. The roller sleeve of vertical mill is not only an important component of vertical mill, but also a vulnerable part of vertical mill equipment. Since the working mechanism of vertical mill is to place the material between the roller sleeve and the grinding disc for grinding, the surface of the roller sleeve wears quickly, and the roller sleeve needs to be replaced and repaired frequently. And because the shutdown of vertical mill has a great impact on production, the reliability of vertical mill is very important. If the time of replacing the roller sleeve of vertical mill can be shortened, the impact of the shutdown of vertical mill on production will be minimized. The disassembly and hoisting of the roller sleeve is the most important task of replacing the roller sleeve. Therefore, a safe, reliable, easy-to-use and efficient hoisting tool is particularly important.

[0003] Since the roller sleeve plays a relatively important role in abrasives, the roller sleeve body is made of cast steel and is divided into tapered rollers and tire rollers, both of which are circular equipment, and the outer surface of the roller sleeve is often welded with a wear-resistant layer. The surface of the roller sleeve of the vertical mill is greatly worn during operation and needs to be turned over and replaced regularly. In addition, the weight of the roller sleeve is often very heavy, so the conventional lifting ring threaded holes on the roller sleeve are not applicable, and it can only rely on external lifting equipment for auxiliary lifting, which makes it difficult to lift the roller sleeve during transportation and installation.

[0004] There are various types of roller sleeve hoists for existing vertical mills. At present, the domestic hoisting of such large castings is to fix the roller sleeve with four steel wire ropes, and then directly hoist it with hoisting ropes, shackles and other tools. This is time-consuming and labor-intensive. On the one hand, the roller sleeve is easy to slip during the hoisting process, posing a major safety hazard; on the other hand, this hoisting method often causes scratches on the surface of the roller sleeve, affecting the quality of the product and causing unnecessary rework and repairs. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a new type of vertical mill roller sleeve lifting tool with a simple structure, strong practicality, and improved working efficiency and safety of roller sleeve replacement in view of the deficiencies of the above-mentioned prior art. The new type of vertical mill roller sleeve lifting tool has strong practicality, can improve the working efficiency of roller sleeve replacement, and eliminate the safety hazards of roller sleeve lifting; it also avoids collision and wear on the outer ring of the grinding roller during lifting, and reduces construction costs.

[0006] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0007] A novel vertical mill roller sleeve hoisting tool comprises a crossbeam and a hook; a lifting lug is arranged at the center of the crossbeam, and the four corners of the crossbeam are rotatably connected with the hook;

[0008] The bottom of the hook is a horizontal plane for supporting the lower end of the roller sleeve, and one end of the tail of the hook is provided with a limiting angle for matching the inner conical surface of the lower end of the roller sleeve, and the limiting angle is fixedly connected to one end of the horizontal plane;

[0009] When the four hooks clamp the inner conical surface of the lower end of the roller sleeve, the crossbeam and the four hooks are locked and connected through the fixing device.

[0010] As a further improved technical solution of the utility model, the crossbeam includes a frame, a lifting ear, a pin, a sleeve, a side plate and a limit block; a lifting ear is arranged at the center of the frame, and both sides of the lifting ear are fixedly connected to the frame, and the four side plates are respectively fixedly connected to the channel steel openings at the four corners of the frame, and a first side plate hole for fixing the sleeve is opened on the side plate, and the four corners of the frame are respectively provided with a first pin shaft hole coaxial with the first side plate hole and used to fix the pin shaft, one end of the sleeve passes through the first side plate hole and the other end is fixedly connected to the frame, the outer circle of the pin shaft and the inner hole of the sleeve of the sleeve are clearance-matched, the pin shaft passes through the sleeve, the tail of the pin shaft passes through the first pin shaft hole on the frame and is fixedly connected with the first pin shaft hole, the front end of the pin shaft exposes the sleeve and is used to be rotatably connected with the hook, each side plate is fixedly connected with a limit block, a first pin hole is arranged on the limit block, and a second side plate hole coaxial with the first pin hole is opened on the side plate, and the first pin hole and the second side plate hole are both used to install the locating pin in the fixing device.

[0011] As a further improved technical solution of the utility model, the frame is formed by four channel steels connected to each other, and a rib plate is fixedly connected to the opening on the back side of the channel steel.

[0012] As a further improved technical solution of the utility model, a long waist-shaped lifting hole is provided on the lifting ear.

[0013] As a further improved technical solution of the utility model, the hook is L-shaped, and the head of the hook is provided with a second pin shaft hole for the pin shaft to pass through, and the second pin shaft hole is in sliding fit with the outer circle of the pin shaft; the threaded hole on the front end surface of the pin shaft is connected to the pressure plate by screws;

[0014] The hook is provided with a second pin hole for installing a positioning pin in the fixing device.

[0015] As a further improved technical solution of the utility model, the fixing device includes a locating pin, a protective cover, a sealing plate, a compression spring, a washer and a cotter pin. The locating pin passes through the compression spring and the washer, and the through hole on the locating pin is plugged into the cotter pin. The compression spring, washer and cotter pin are all located in the protective cover. The washer can slide in the protective cover. One end of the protective cover is fixedly connected to the sealing plate, and the other end is open and fixedly connected to the hook. A sealing plate center hole is provided in the center of the sealing plate. The locating pin passes through the sealing plate center hole and the shoulder of the locating pin is exposed from the sealing plate. The locating pin passes through the second pin hole of the hook and the first pin hole of the side plate. The locating pin can slide in the sealing plate center hole, the second pin hole and the first pin hole.

[0016] As a further improved technical solution of the utility model, the positioning pin is a pin with a head and a hole.

[0017] The beneficial effects of the utility model are:

[0018] When the utility model is used, the roller sleeve is placed on the bracket so that the roller sleeve is suspended, and the hooks are rotated respectively to align the lower plane of the hook with the bottom plane of the large end of the roller sleeve, and the limiting angle of the tail of the hook is clamped on the inner circular inclined surface of the lower end of the roller sleeve, and the self-centering force of the hook is used to achieve the limitation of the roller sleeve. At the same time, the positioning pin is pulled, and the compression force of the compression spring in the fixing device is used to insert the positioning pin into the first pin hole on the limiting block, and the lifting can begin. At this time, the lifting hole of the crossbeam is located at the center of the roller sleeve, and it is directly lifted by using external shackles and wire ropes and other tools. After the lifting is completed, the positioning pin is pulled out, and the lifting device is disassembled by rotating the hook.

[0019] The vertical mill roller sleeve lifting tool of the utility model has the advantages of simple structure, easy manufacturing, low cost, strong practicality, improving the work efficiency of roller sleeve replacement, and eliminating the safety hazards of roller sleeve lifting; when lifting heavy grinding rollers, it is convenient for workers to operate and reduce the number of handling personnel required for lifting. The utility model clamps the roller sleeve with the hook, which also avoids the shaking or movement of the roller sleeve during lifting, thereby preventing the collision and wear of the outer ring of the grinding roller and reducing the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the front view of the new vertical mill roller sleeve lifting tool structure.

[0021] Figure 2 It is a top view of the new vertical mill roller sleeve lifting tool structure.

[0022] Figure 3 It is an axial view of the new vertical mill roller sleeve lifting tool structure.

[0023] Figure 4 This is the axial side view of the crossbeam structure in the new vertical mill roller sleeve lifting tool.

[0024] Figure 5yes Figure 2 Middle AA section view.

[0025] Figure 6 yes Figure 2 Middle BB section view.

[0026] Figure 7 yes Figure 1 Middle CC section view. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings:

[0028] See also Figure 1 , Figure 2 , Figure 3 As shown in the structural schematic diagram of the new type of vertical mill roller sleeve hoisting tool, a new type of vertical mill roller sleeve hoisting tool includes a crossbeam 100, a hook 200, a fixing device 300, etc. The crossbeam 100 serves as the main frame of the hoisting device, and while ensuring the structural strength, a lifting lug 102 is arranged at the center of the frame. As the only vertical hoisting point of the hoisting device, the hook 200 is symmetrically arranged at the four corners of the crossbeam 100. At this time, the force of the hoisting point can be evenly distributed to the hooks 200 at the four corners of the crossbeam 100. The special hook shape design and special arrangement method enable the hoisting device to have a self-centering function for the roller sleeve 1. The roller sleeve 1 is tightened by the limit and outward force of the hook 200 to prevent the roller sleeve 1 from falling off during lifting, and it can also ensure that the hoisting point is located in the center of the roller sleeve 1 to prevent the center of gravity from being biased during lifting. In addition, the fixing device 300, as a limit device of the hook, can ensure that the hook 200 does not loosen and the roller sleeve does not move, and plays the role of a safety pin.

[0029] In the initial state, the positioning pin 301 has been pulled out of the first pin hole 122 on the limiting block 107 , and the positioning pin 301 is separated from the limiting block 107 . When in use, place the roller sleeve 1 on the bracket 2 so that the roller sleeve 1 is suspended, rotate the hook 200 respectively, align the lower plane 204 of the hook 200 with the bottom plane of the large end of the roller sleeve 1, and clamp the limiting angle 205 at the tail of the hook 200 on the inner circular inclined surface of the lower end of the roller sleeve 1, use the self-centering force of the hook 200 to limit the roller sleeve 1, and use the compression force of the compression spring 304 in the fixing device 300 to insert the positioning pin 301 into the first pin hole 122 on the limiting block 107, thereby realizing the locking connection between the hook 200 and the beam 100, that is, the hook 200 cannot rotate, and the lifting can begin. At this time, the lifting hole 110 of the beam 100 is located at the center of the roller sleeve 1, and it is directly lifted using external shackles and wire ropes and other tools. After the lifting is completed, pull out the positioning pin 301, and rotate the hook 200 to complete the disassembly of the lifting device.

[0030] See also Figure 4 , Figure 5 , Figure 6As shown in the structural schematic diagram of the new vertical mill roller sleeve hoisting tool, the crossbeam 100 includes a frame 101, a lifting lug 102, a pin 103, a sleeve 104, a side plate 105, a rib plate 106, a limit block 107, a pressure plate 108, a screw 109, etc. The frame 101 adopts a channel steel ring beam structure, and a lifting lug 102 is arranged at the center of the frame 101. The lifting lug 102 is made of a thick plate, and the two ends of the bottom of the lifting lug 102 are provided with steps 111, and the steps 111 are placed at the lower part of the frame 101. The ears 102 are fixedly connected to the frame 101 on both sides, and rib plates 106 are provided at the openings on the back of the channel steel to increase the structural strength. The lifting ears 102 are provided with long waist-shaped lifting holes 110, which serve as the only vertical lifting point of the sling. The lifting holes 110 are directly lifted by connecting external wire ropes and other equipment through shackles. The central force is evenly distributed to the pins 103 at the four corners through the frame 101, and the pins 103 are connected to the hook 200, and finally act on the hook 200. There are 4 side panels 105, all of which are fixedly connected to the openings of the channel steels at the four corners of the frame 101 to increase the structural strength. A circular hole is provided on the side panel 105, namely a first side panel hole 112 for fixing the sleeve 104. Four first pin holes 113 coaxial with the first side panel hole 112 are respectively provided at the four corners of the frame 101 for fixing the pin 103. One end of the sleeve 104 passes through the side panel hole 112, and the other end is fixedly connected to the frame 101. There are 4 pins 103, which are respectively arranged at the four corners of the frame 101. The outer circle of the pin 103 and the inner hole 114 of the sleeve are clearance-matched. The pin 103 passes through the sleeve 104, and the tail of the pin 103 passes through the first pin hole 113 on the frame 101 and is fixedly connected to the frame 101. The front section of the pin 103 is exposed from the sleeve 104 for installing the hook 200. The front end surface of the pin 103 is provided with a threaded hole 120 for installing the screw 109. There are 4 limit blocks 107, all of which are fixedly connected to the side plate 105. The limit block 107 is provided with a first pin hole 122 which is concentric with the pin shaft 103 and has an angle of 20° (so that the hook 200 has a lifting angle after tilting). At the same time, the first pin hole 122 and the second side plate hole 123 are penetrated for installing the positioning pin 301.

[0031] See also Figure 1 , Figure 5 , Figure 6As shown in the structural schematic diagram of the new vertical mill roller sleeve lifting tool, the hook 200 is "L"-shaped, with 4 pieces in number, 2 pieces in each group, and 2 groups in total, symmetrically arranged on the pins 103 at the four corners of the frame 101. The inclination angle of a single hook 200 to the vertical direction is 16°, and the angle of force of the hook 200 is 32°. The bottom of the hook 200 is a horizontal plane 204 for supporting and fixing the lower end of the roller sleeve 1. The head of the hook 200 is provided with a second pin hole 206 that passes through the pin 103 and is in sliding fit with the outer circle of the pin 103, so that the hook 200 can rotate freely with the pin 103 as the axis, thereby improving the stability of the connection, and each hook 200 can move independently, and the hook 200 is limited to the end of the pin 103 by locking with a screw 109 through the external pressure plate 108 to prevent the hook 200 from falling off, with high safety. A second pin hole 210 coaxial with the first pin hole 122 is synchronously provided on the hook 200. At this time, the lower plane 204 of the hook 200 is flush with the lower end of the roller sleeve 1. At the same time, a limited angle 205 is provided at one end of the tail of the hook 200. The limited angle 205 is matched with the angle of the inner conical surface 11 at the lower end of the roller sleeve 1. When in use, the limited angles 205 of the four hooks 200 act at the same time with a uniform outward pulling force, firmly clamping the inner conical surface 11 at the lower end of the roller sleeve 1. At the same time, the locating pin 301 of the fixing device 300 is inserted into the first pin hole 122 on the limit block 107 and the second side plate hole 123 corresponding to the side plate 105 to achieve the locking of the hook 200, so that the roller sleeve 1 can be firmly fixed on the hook 200, preventing the roller sleeve 1 from slipping, and improving the safety of hoisting the roller sleeve 1.

[0032] See also Figure 7 As shown in the "CC" view of the new vertical mill roller sleeve lifting tool structure, the fixing device 300 has a total of 4 groups, including a positioning pin 301, a protective cover 302, a sealing plate 303, a compression spring 304, a washer 305, a cotter pin 306, etc. The positioning pin 301 adopts a pin with a head and a hole. One end of the positioning pin 301 passes through the compression spring 304, and is fixed by a washer 305 and a cotter pin 306. Both are installed inside the protective cover 302. The cotter pin 306 passes through the through hole on the positioning pin 301. The protective cover 302 is made of a round tube, and a sealing plate 304 is set at one end. The sealing plate 304 has a hole in the center, namely the sealing plate center hole 310. The sealing plate center hole 310 is used to install the positioning pin 301. The positioning pin 301 passes through the sealing plate center hole 310 and the shoulder is exposed from the sealing plate 304. The other end of the protective cover 302 is open and fixedly connected to the hook 200. The sealing plate hole 310 is concentric with the hook pin hole 210. The compression force of the compression spring 304 can make the positioning pin 301 pass through the first pin hole 122 on the limit block 107, so as to realize the circumferential limitation of the hook 200 and play the insurance role of the safety pin, so that the four hooks 200 are clamped with the roller sleeve 1.

[0033] The new vertical mill roller sleeve lifting tool of the present embodiment has the advantages of simple structure, easy manufacturing, low cost, and strong practicality, which improves the work efficiency of roller sleeve replacement and eliminates the safety hazards of roller sleeve lifting. When lifting heavy grinding rollers, it is convenient for workers to operate and reduces the number of handling personnel required during lifting. The structure of the present utility model also avoids collision and wear on the outer ring of the grinding roller during lifting, thereby reducing construction costs.

[0034] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A new type of vertical mill roller sleeve lifting tool, characterized in that: It comprises a crossbeam (100) and a hook (200); a lifting lug (102) is arranged at the center of the crossbeam (100), and the four corners of the crossbeam (100) are rotatably connected to the hook (200); The bottom of the hook (200) is a horizontal surface (204) for supporting the lower end of the roller sleeve (1), and a limiting angle (205) for matching the angle of the inner conical surface (11) at the lower end of the roller sleeve (1) is provided at one end of the tail of the hook (200); When the four hooks (200) clamp the inner conical surface (11) at the lower end of the roller sleeve (1), the crossbeam (100) and the four hooks (200) are locked and connected via the fixing device (300).

2. The new vertical mill roller sleeve hoisting tool according to claim 1 is characterized in that: The crossbeam (100) comprises a frame (101), a lifting ear (102), a pin (103), a sleeve (104), a side plate (105) and a limit block (107); a lifting ear (102) is arranged at the center of the frame (101); both sides of the lifting ear (102) are fixedly connected to the frame (101); four side plates (105) are respectively fixedly connected to the channel steel openings at the four corners of the frame (101); a first side plate hole (112) for fixing the sleeve (104) is opened on the side plate (105); first pin holes (113) coaxial with the first side plate hole (112) and used to fix the pin (103) are respectively arranged at the four corners of the frame (101); one end of the sleeve (104) passes through the first side plate hole (112), and the other end is fixedly connected to the frame (101). The outer circle of the pin shaft (103) and the inner hole (114) of the sleeve (104) are clearance-matched, the pin shaft (103) passes through the sleeve (104), the tail of the pin shaft (103) passes through the first pin shaft hole (113) on the frame (101), and is fixedly connected to the first pin shaft hole (113), the front end of the pin shaft (103) is exposed from the sleeve (104), and is used for rotationally connecting with the hook (200), each side plate (105) is fixedly connected to a limit block (107), the limit block (107) is provided with a first pin hole (122), and the side plate (105) is provided with a second side plate hole (123) coaxial with the first pin hole (122), and the first pin hole (122) and the second side plate hole (123) are both used for installing a positioning pin (301) in the fixing device (300).

3. The new type of vertical mill roller sleeve hoisting tool according to claim 2 is characterized in that: The frame (101) is formed by connecting four channel steels to each other, and a rib plate (106) is fixedly connected to the opening of the back side of the channel steel.

4. The new type of vertical mill roller sleeve hoisting tool according to claim 2 is characterized in that: The lifting lug (102) is provided with a long waist-shaped lifting hole (110).

5. The new type of vertical mill roller sleeve hoisting tool according to claim 2 is characterized in that: The hook (200) is L-shaped, and the head of the hook (200) is provided with a second pin hole (206) for the pin (103) to pass through, and the second pin hole (206) is rotatably connected to the outer circle of the pin (103); the threaded hole (120) on the front end surface of the pin (103) is connected to the pressure plate (108) via a screw (109); The hook (200) is provided with a second pin hole (210) for installing a positioning pin (301) in the fixing device (300).

6. The novel vertical mill roller sleeve hoisting tool according to claim 5 is characterized in that: The fixing device (300) comprises a positioning pin (301), a protective cover (302), a sealing plate (303), a compression spring (304), a washer (305) and a split pin (306); the positioning pin (301) passes through the compression spring (304) and the washer (305); a through hole on the positioning pin (301) is plugged into the split pin (306); the compression spring (304), the washer (305) and the split pin (306) are all located in the protective cover (302); the washer (305) can slide in the protective cover (302); the protective cover (302) One end is fixedly connected to a sealing plate (303), and the other end is open and fixedly connected to the hook (200). A sealing plate center hole (310) is provided in the center of the sealing plate (303). The positioning pin (301) passes through the sealing plate center hole (310) and the shoulder of the positioning pin (301) is exposed from the sealing plate (303). The positioning pin (301) passes through the second pin hole (210) of the hook (200) and the first pin hole (122) of the side plate (105). The positioning pin (301) can slide in the sealing plate center hole (310), the second pin hole (210) and the first pin hole (122).

7. The new type of vertical mill roller sleeve hoisting tool according to claim 6 is characterized in that: The positioning pin (301) is a pin with a head and a hole.

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