Safety limiting device of metallurgical crane

Abstract

The invention discloses a metallurgical crane safety limiting device, and relates to the field of metallurgical cranes, the metallurgical crane safety limiting device comprises a hoist crane, a protective cover, a track and a lifting hook, the hoist crane is installed on the track, the protective cover is installed below the hoist crane, the lifting hook is installed on the hoist crane through a sling, the upper end of the hoist crane is provided with a roller, and the upper end of the roller is provided with a lifting hook. The idler wheels can move on the track, and a safety limiting frame is arranged on the sling; the safety limiting frame comprises a left support and a right support, the left support and the right support are connected through an elastic piece, the top of the safety limiting frame is connected to the lower portion of the protective cover through a rotating limiting frame, and when the crane runs, if a sling shakes, the shake is guided to the elastic piece through the arranged safety limiting frame, and the sling is prevented from shaking. The shaking is eliminated through the buffering effect of the elastic piece; when the crane runs, if the safety limiting frame shakes, the shaking can be eliminated through the arranged rotating limiting frame.

Description

Technical Field

[0001] The invention relates to the field of metallurgical cranes, in particular to a safety limit device for metallurgical cranes. Background Art

[0002] Metallurgical cranes are suitable for metal smelting workshops and are special cranes for lifting molten metal. When lifting molten metal, a pair of two main and three-piece hooks are usually set to lift the container with molten metal at the same time, and the three hooks work together to achieve lifting, transportation, dumping and other tasks. In the above process, because the sling of the hook is sometimes very long, it is very easy to shake, especially when starting to move after lifting and when it needs to stop after transportation. Because the molten metal is very heavy and has a large inertia, the shaking will be very violent, and the molten metal is likely to fluctuate when dumping.

[0003] Chinese patent CN115744642B - a high-stability metallurgical bridge crane, which discloses a solution: by setting a clamping mechanism at the end of the beam, a limit is formed by clamping when the hook moves to this position, so as to achieve the tightening of the sling, thereby preventing the molten metal from shaking. However, this patent can only achieve this function at the end of the beam where the clamping mechanism is set, and the crane is usually used in multiple processes and production lines during use. The position of the crane required for each process and production line does not move to the same position, and the clamping mechanism cannot produce an effect during the movement of the crane, and still cannot completely solve the problem of shaking. Summary of the invention

[0004] The object of the present invention is to provide a safety limit device for a metallurgical crane to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a metallurgical crane safety limit device, comprising a hoist, a protective cover, a track and a hook, wherein the hoist is installed on the track, the protective cover is installed below the hoist, the hook is installed on the hoist through a sling, a roller is provided at the upper end of the hoist, the roller can move on the track, and a safety limit frame is provided on the sling;

[0006] The safety limit frame includes a left bracket and a right bracket, the left bracket and the right bracket are connected by an elastic member, and the top of the safety limit frame is connected to the bottom of the protective cover through a rotating limit frame;

[0007] The rotation limit frame includes a connecting frame and a rotating shaft. The root of the connecting frame is fixedly mounted on the protective cover. The end of the connecting frame is provided with a sealing cavity. The sealing cavity is connected to the oil tank through a pipeline. The oil tank is installed in the track.

[0008] Preferably, the track includes symmetrically arranged guide tracks and a limiting track located between the two guide tracks, and a groove is provided in the guide track.

[0009] Preferably, an extrusion block is provided in the middle of the roller, and the extrusion block is fixedly mounted on the hoist and is slidably connected to the limiting track.

[0010] Preferably, the hook comprises two main hooks arranged side by side and a separately arranged auxiliary hook, wherein the auxiliary hook is located on one side of the main hook and is at the same distance from the two main hooks.

[0011] Preferably, the slings are each provided with a limiting sleeve, and the limiting sleeve is fixedly installed in the left bracket and the right bracket respectively.

[0012] Preferably, a connecting rod and a connecting sleeve are provided at the connection between the left bracket and the right bracket, the connecting rod is installed on the left bracket, the connecting sleeve is installed on the right bracket, and the connecting rod can slide relative to the connecting sleeve.

[0013] Preferably, the elastic member includes a leaf spring, an air cylinder and a heat conductive sheet, the two ends of the leaf spring are fixedly connected to the left bracket and the right bracket through a connecting member, the upper and lower ends of the air cylinder are provided with piston rods, the outer end of the piston rod is clamped on the leaf spring, the inner end of the piston rod is slidably connected in the air cylinder, and the heat conductive sheet is fixedly mounted on the cylinder wall of the air cylinder.

[0014] Preferably, the end of the rotating shaft extends into the connecting frame, the end of the rotating shaft is provided with a blade, and the sealing cavity is provided with an oil inlet nozzle and an oil outlet nozzle.

[0015] Preferably, the oil tank is provided with an oil nozzle connected to an oil inlet nozzle and an oil outlet nozzle through a pipeline, and the oil tank is made of a compressible material.

[0016] Preferably, a push plate is provided on the side of the oil bin, the push plate is connected to a push block, and the push block is slidably installed in the guide rail and protrudes from the side of the guide rail.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the crane is in operation, if the sling shakes, the shaking will be guided to the elastic member through the set limit sleeve and the left bracket and the right bracket, and the shaking will be eliminated through the buffering effect of the elastic member;

[0019] 2. When the crane is in operation, if the safety limit frame itself shakes, the shaking will be eliminated by the set rotating limit frame to prevent the shaking from being transmitted to the sling and causing the molten metal to shake. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A top view of the present invention;

[0022] Figure 3 It is the front view of the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of the safety limit frame and the rotation limit frame of the present invention;

[0024] Figure 5 for Figure 4 A magnified view of the structure at D inside;

[0025] Figure 6 This is the exploded structural diagram of the rotation limit frame;

[0026] Figure 7 It is the side view of the oil tank, oil nozzle, push plate and push block structure;

[0027] Figure 8 for Figure 1 Enlarged view of the structure at inner E.

[0028] In the figure: 1-hoisting hoist; 11-roller; 12-extrusion block; 2-protective cover; 3-track; 31-guide track; 32-limit track; 4-hook; 41-sling; 42-main hook; 43-auxiliary hook; 5-safety limit frame; 51-left bracket; 52-right bracket; 53-elastic member; 54-limit sleeve; 55-connecting rod; 56-connecting sleeve; 531-leaf spring; 532-air cylinder; 533-heat conducting sheet; 534-connecting member; 535-piston rod; 6-rotation limit frame; 61-connecting frame; 62-rotation shaft; 63-sealing chamber; 621-blade; 631-oil inlet nozzle; 632-oil outlet nozzle; 7-oil tank; 71-oil nozzle; 72-push plate; 73-push block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 8The present invention provides a technical solution: a safety limit device for a metallurgical crane, comprising a hoisting hoist 1, a protective cover 2, a track 3 and a hook 4, wherein the hoisting hoist 1 is installed on the track 3, the protective cover 2 is installed below the hoisting hoist 1, and the hook 4 is installed on the hoisting hoist 1 through a sling 41, wherein a roller 11 is provided at the upper end of the hoist 1, and the roller 11 can move on the track 3, and a safety limit frame 5 is provided on the sling 41, which drives the hoist 1 to move forward and backward through the track 3, and the protective cover 2 is used to provide guidance and protection for the sling 41.

[0031] The safety limit frame 5 includes a left bracket 51 and a right bracket 52, and the left bracket 51 and the right bracket 52 are connected by an elastic member 53. The top of the safety limit frame 5 is connected to the bottom of the protective cover 2 through a rotating limit frame 6. The safety limit frame 5 is triangular in shape as a whole, and the stability of its structure itself is utilized to make the sling 41 passing through the safety limit frame 5 have corresponding stability.

[0032] The rotating limit frame 6 includes a connecting frame 61 and a rotating shaft 62. The root of the connecting frame 61 is fixedly mounted on the protective cover 2. The end of the connecting frame 61 is provided with a sealing cavity 63. The sealing cavity 63 is connected to the oil tank 7 through a pipeline. The oil tank 7 is installed in the track 3. Through the action of the rotating limit frame 6, the shaking of the sling 41 caused by the shaking of the safety limit frame 5 is reduced.

[0033] In this embodiment, the track 3 includes symmetrically arranged guide rails 31 and a limiting rail 32 located between the two guide rails 31. A groove is provided in the guide rail 31. The groove in the guide rail 31 is used to provide a limit for the movement of the roller 11. The set guide rail 31 provides a limit for the movement of the extrusion block 12.

[0034] In this embodiment, an extrusion block 12 is provided in the middle of the roller 11 . The extrusion block 12 is fixedly mounted on the hoist 1 and is slidably connected to the limiting track 32 . The extrusion block 12 acts on the push block 73 by following the forward and backward movement of the hoist 1 .

[0035] In this embodiment, the hook 4 includes two main hooks 42 arranged side by side and a separately arranged auxiliary hook 43. The auxiliary hook 43 is located on one side of the main hook 42 and is at the same distance from the two main hooks 42. The two main hooks 42 can lift the container from both sides of the container filled with molten metal. The auxiliary hook 43 located on the side lifts the container from the side, and also uses the stability of the triangle to keep the container stable. At the same time, by raising the auxiliary hook 43 alone, the container can be tilted to pour out the molten metal in the container.

[0036] In this embodiment, a limiting sleeve 54 is provided on the sling 41, and the limiting sleeve 54 is fixedly installed in the left bracket 51 and the right bracket 52 respectively. The limiting sleeve 54 can exert a limiting effect on the sling 41 from the outside of the sling 41, thereby reducing the impact of the sling 41 on the lower hook 4 when it shakes.

[0037] In this embodiment, a connecting rod 55 and a connecting sleeve 56 are provided at the connection between the left bracket 51 and the right bracket 52. The connecting rod 55 is installed on the left bracket 51, and the connecting sleeve 56 is installed on the right bracket 52. The connecting rod 55 can slide relative to the connecting sleeve 56. When the left bracket 51 and the right bracket 52 are connected into a whole, the relative sliding of the connecting rod 55 and the connecting sleeve 56 is combined with the elastic member 53 to enable the entire safety limit frame 5 to have the ability to absorb the shaking generated during the movement of the sling 41 through elastic deformation, instead of directly applying the force generated by the shaking to the safety limit frame 5 without any buffering.

[0038] In this embodiment, the elastic member 53 includes a leaf spring 531, an air cylinder 532 and a heat conductive sheet 533. The two ends of the leaf spring 531 are fixedly connected to the left bracket 51 and the right bracket 52 through a connecting member 534. The upper and lower ends of the air cylinder 532 are provided with a piston rod 535. The outer end of the piston rod 535 is clamped on the leaf spring 531, and the inner end of the piston rod 535 is slidably connected in the air cylinder 532. The heat conductive sheet 533 is fixedly installed on the wall of the air cylinder 532. After the sling 41 lifts the molten metal and starts the entire crane, in the process of reaching the set speed from rest, the molten metal below will inevitably cause the sling 41 to move due to inertia. When the sling 41 produces shaking, the leaf spring 531 set at this time can absorb the shaking through the up and down deformation of the leaf spring 531 when the sling 41 produces shaking and is applied to the safety limit frame 5 through the limiting sleeve 54, and an air cylinder 532 is set between the leaf springs 531. When the heat conductive sheet 533 on the side of the air cylinder 532 is heated by the molten metal liquid below, the gas in the air cylinder 532 becomes more active, thereby increasing the pressure in the air cylinder 532, which can effectively absorb the deformation of the leaf spring 531 caused by the shaking of the sling 41, and then stop the shaking caused by inertia as soon as possible. At the same time, after moving to the appropriate position, the elastic member 53 still has the same function when changing from motion to stillness.

[0039] In this embodiment, the end of the rotating shaft 62 extends into the connecting frame 61, and the end of the rotating shaft 62 is provided with a blade 621. The sealing chamber 63 is provided with an oil inlet nozzle 631 and an oil outlet nozzle 632. The oil tank 7 is provided with an oil nozzle 71 connected to the oil inlet nozzle 631 and the oil outlet nozzle 632 through a pipeline. The oil tank 7 is made of a compressible material. A push plate 72 is provided on the side of the oil tank 7. The push plate 72 is connected to a push block 73. The push block 73 is slidably installed in the guide rail 31 and protrudes from the side of the guide rail 31. During the movement of the extrusion block 12, the inclined surface at the front end of the push block 73 will continuously press The push block 73 moves into the guide rail 31, so that the push block 73 pushes the push plate 72 to compress the oil tank 7. The oil in the oil tank 7 will flow through the oil nozzle 71 through the pipeline to the oil inlet nozzle 631 and finally enter the sealing chamber 63. At the same time, a pressure valve is set at the oil outlet nozzle 632. The oil will flow out through the oil outlet nozzle 632 when the sealing chamber 63 reaches the set pressure. In this way, a high-pressure environment can be maintained in the sealing chamber 63. When the safety limit frame 5 is affected by external factors such as equipment operation and produces shaking, the shaking is eliminated by the swing of the blade 621 in the high-pressure oil, thereby preventing the shaking of the safety limit frame 5 from affecting the sling 41.

[0040] Working principle: When the metallurgical crane lifts the molten metal, in the process of reaching the set speed from static, the molten metal below will inevitably cause the sling 41 to shake due to inertia. At this time, when the sling 41 shakes and is applied to the safety limit frame 5 through the limiting sleeve 54, the leaf spring 531 can absorb the shaking through the up and down deformation of the leaf spring 531, and an air cylinder 532 is provided between the leaf springs 531. When the heat conducting sheet 533 on the side of the air cylinder 532 is heated by the molten metal below, the gas in the air cylinder 532 becomes more active, increasing the pressure in the air cylinder 532. This can effectively absorb the deformation of the leaf spring 531 caused by the shaking of the sling 41, thereby stopping the shaking caused by inertia as soon as possible. At the same time, after moving to the appropriate position, the elastic member 53 still has the same function when it changes from motion to static. The cam 73 is pressed against the support frame 71 and the support frame 72 is pressed against the support frame 73. The cam 73 is pressed against the support frame 71 and the support frame 72 is pressed against the support frame 73. The cam 73 is pressed against the support frame 73 and the support frame 72 is pressed against the support frame 73.

[0041] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A safety limit device for a metallurgical crane, characterized in that: The invention comprises a lifting hoist (1), a protective cover (2), a track (3) and a hook (4), wherein the lifting hoist (1) is installed on the track (3), the protective cover (2) is installed below the lifting hoist (1), the hook (4) is installed on the lifting hoist (1) via a sling (41), wherein a roller (11) is provided at the upper end of the hoist (1), the roller (11) can move on the track (3), and a safety limit frame (5) is provided on the sling (41); The safety limit frame (5) comprises a left support (51) and a right support (52), the left support (51) and the right support (52) are connected via an elastic member (53), and the top of the safety limit frame (5) is connected to the bottom of the protective cover (2) via a rotating limit frame (6); The rotation limit frame (6) comprises a connecting frame (61) and a rotating shaft (62). The root of the connecting frame (61) is fixedly mounted on the protective cover (2). The end of the connecting frame (61) is provided with a sealing cavity (63). The sealing cavity (63) is connected to an oil tank (7) via a pipeline. The oil tank (7) is mounted in the track (3).

2. A metallurgical crane safety limit device according to claim 1, characterized in that: The track (3) comprises symmetrically arranged guide tracks (31) and a limiting track (32) located between the two guide tracks (31), and a groove is provided in the guide track (31).

3. A metallurgical crane safety limit device according to claim 2, characterized in that: An extrusion block (12) is provided in the middle of the roller (11); the extrusion block (12) is fixedly mounted on the hoist (1) and is slidably connected to the limiting track (32).

4. A metallurgical crane safety limit device according to claim 1, characterized in that: The hook (4) comprises two main hooks (42) arranged side by side and a separately arranged auxiliary hook (43), wherein the auxiliary hook (43) is located on one side of the main hook (42) and is at the same distance from the two main hooks (42).

5. A metallurgical crane safety limit device according to claim 1, characterized in that: The slings (41) are each provided with a limiting sleeve (54), and the limiting sleeve (54) is respectively fixedly mounted in the left bracket (51) and the right bracket (52).

6. A metallurgical crane safety limit device according to claim 1, characterized in that: A connecting rod (55) and a connecting sleeve (56) are provided at the connection between the left bracket (51) and the right bracket (52); the connecting rod (55) is installed on the left bracket (51), and the connecting sleeve (56) is installed on the right bracket (52); the connecting rod (55) can slide relative to the connecting sleeve (56).

7. A metallurgical crane safety limit device according to claim 1, characterized in that: The elastic member (53) comprises a leaf spring (531), an air cylinder (532) and a heat conductive sheet (533); the two ends of the leaf spring (531) are fixedly connected to the left bracket (51) and the right bracket (52) via a connecting member (534); the upper and lower ends of the air cylinder (532) are provided with a piston rod (535); the outer end of the piston rod (535) is clamped on the leaf spring (531); the inner end of the piston rod (535) is slidably connected in the air cylinder (532); and the heat conductive sheet (533) is fixedly mounted on the cylinder wall of the air cylinder (532).

8. A metallurgical crane safety limit device according to claim 1, characterized in that: The end of the rotating shaft (62) extends into the connecting frame (61), a blade (621) is provided at the end of the rotating shaft (62), and an oil inlet nozzle (631) and an oil outlet nozzle (632) are provided on the sealing cavity (63).

9. A metallurgical crane safety limit device according to claim 8, characterized in that: The oil bin (7) is provided with an oil nozzle (71) connected to an oil inlet nozzle (631) and an oil outlet nozzle (632) through a pipeline, and the oil bin (7) is made of a compressible material.

10. A metallurgical crane safety limit device according to claim 2, characterized in that: A push plate (72) is provided on the side of the oil bin (7), and the push plate (72) is connected to a push block (73). The push block (73) is slidably mounted in the guide track (31) and protrudes from the side of the guide track (31).

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