Safety protection device of overhead and portal crane

Abstract

The utility model discloses a safety protection device of an overhead and portal crane, which relates to the technical field of cranes and comprises a lifting hook with a groove, an observation port is arranged on the lifting hook, a rotating rod is rotatably mounted in the groove, a rotating plate is fixedly sleeved on the rotating rod, and the rotating plate is fixedly connected with the lifting hook. The rotating plate penetrates through the observation through opening and is movably connected with the observation through opening, the rotating rod is movably sleeved with two torsional springs, the ends, close to each other, of the two torsional springs are fixedly connected with the rotating plate, and the ends, away from each other, of the two torsional springs are fixedly connected with the inner wall of the groove; a connecting plate is fixedly mounted at the top end of the lifting hook, a sealing box is fixedly mounted at the top end of the connecting plate, a pulley is rotatably mounted in the sealing box, and two guide pipes are fixedly mounted on the sealing box.

Description

TECHNICAL FIELD

[0001] The utility model relates to a crane technical field, especially a bridge -portal crane safety device. BACKGROUND

[0002] The bridge -portal crane is also called gantry crane, is mainly used in the outdoor freight yard, material yard freight, bulk cargo's loading and unloading operation, and has the characteristics such as high field utilization rate, wide operation range, wide adaptability and strong versatility, and is widely used in the port freight yard, and its metal structure is like a door frame, two support feet are installed under the bearing girder, can directly walk on the track on the ground, and the both ends of the main girder can have an outer extension cantilever beam, and the bridge -portal crane has several classifications such as door frame structure form, main girder form, main girder structure and purpose, and can be divided into portal crane and cantilever portal crane according to the door frame structure, and the portal crane is divided into full portal crane and half portal crane, and the cantilever portal crane is divided into double cantilever portal crane and single cantilever portal crane.

[0003] The lifting capacity of the bridge -portal crane is often very large, and the opening degree of the hook will gradually increase during long-term use, and the hook should be scrapped when the opening degree increases by 10% compared with the original size, but the existing hook lacks a device for testing the opening degree, so that the hook cannot be replaced in time when the opening is too large, and there is a certain safety hazard. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a bridge -portal crane safety device to solve at least any one of the problems in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a bridge -portal crane safety device, including the hook that is provided with the recess, and the hook is provided with the observation through hole, the recess is rotatably installed with the rotating rod, the rotating rod is fixedly sleeved with the rotating plate, and the rotating plate penetrates the observation through hole and is movably connected with the observation through hole, two torsional springs are movably sleeved on the rotating rod, and the ends of the two torsional springs close to each other are fixedly connected with the rotating plate, and the ends of the two torsional springs away from each other are fixedly connected with the inner wall of the recess, the top of the hook is fixedly installed with the connecting plate, the top of the connecting plate is fixedly installed with the sealed box, the sealed box is rotatably installed with the pulley, the sealed box is fixedly installed with two guide pipes, and the bottoms of the two guide pipes extend into the sealed box, the pulley is slidably installed with the pull rope, and the pull rope penetrates the two guide pipes, and the two ends of the pull rope extend out of the guide pipe.

[0006] Preferably, the recess is fixedly installed with the arc-shaped guide plate.

[0007] Preferably, the surface of the torsion spring is tin-plated.

[0008] Preferably, the sealed box contains lubricating oil, and three lubricating oil application rollers are rotatably installed inside the sealed box, with all three lubricating oil application rollers in contact with the pull rope.

[0009] Preferably, a rubber sealing ring is fixedly installed inside each of the two guide tubes, and the two pull ropes pass through the two rubber sealing rings respectively and are slidably sealed to the inner walls of the two rubber sealing rings respectively.

[0010] Preferably, the top of the sealed box is provided with an externally threaded oil filling pipe, and a rotating sealing cap is threaded onto the externally threaded oil filling pipe.

[0011] Preferably, rotating grooves are respectively formed on the inner walls of both sides of the groove, and the two ends of the rotating rod extend into the two rotating grooves respectively and are respectively fixedly fitted with bearings, and the outer rings of the two bearings are respectively fixedly connected to the inner walls of the two rotating grooves.

[0012] The beneficial effects of this utility model are as follows:

[0013] In this invention, when the hook portion bends downwards to the point that the rotating plate emerges from the observation opening, it indicates that the hook's opening has reached the point of being scrapped. The hook can then be replaced immediately to reduce safety hazards. The pull rope slides on the pulley, and through friction, it drives the lubricating oil application roller to rotate, continuously applying lubricating oil to the pull rope. This lubrication reduces wear on the pull rope and extends its service life. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the safety protection device for bridge and gantry cranes provided by this utility model;

[0015] Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below;

[0016] Figure 3 for Figure 1 The enlarged schematic diagram of section B is shown below;

[0017] Figure 4 A perspective view of the safety protection device for the bridge gantry crane provided by this utility model.

[0018] In the diagram: 1. Hook; 2. Groove; 3. Rotating rod; 4. Bow-shaped guide plate; 5. Torsion spring; 6. Rotating plate; 7. Guide tube; 8. Rubber sealing ring; 9. Pull rope; 10. Sealing box; 11. Pulley; 14. External threaded oil filling pipe; 15. Rotary sealing cap; 16. Lubricating oil application roller; 17. Connecting plate; 18. Observation port. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] The utility model provides a kind of bridge portal crane safety protection device as Figures 1-4 As shown in a kind of bridge portal crane safety protection device, including the hook 1 being opened with recess 2, and the observation through 18 is opened in hook 1, rotating rod 3 is rotatably installed in recess 2, in order to rotate rod 3 rotatably install in recess 2, rotating groove is respectively opened on the inner wall of the two sides of recess 2, the two ends of rotating rod 3 are respectively extended into two rotating grooves and are respectively fixed with bearing, and the outer ring of two bearings is respectively fixedly connected with the inner wall of two rotating grooves, rotating rod 3 is more stable in recess 2 by bearing use, rotating plate 6 is fixedly sleeved on rotating rod 3, and rotating plate 6 penetrates observation through 18 and is movably connected with observation through 18, when the curved hook portion of hook 1 is bent downward to make rotating plate 6 from observation through 18, it indicates that the opening degree of hook 1 reaches scrap state, and then replacing hook 1 in first time, reduce security risk, two torsional springs 5 are movably sleeved on rotating rod 3, in order to improve the service life of torsional spring 5, torsional spring 5 surface is tinned, and the end of two torsional springs 5 close to each other is fixedly connected with rotating plate 6, the end of two torsional springs 5 away from each other is fixedly connected with the inner wall of recess 2, the top of hook 1 is fixedly installed with link plate 17, the top of link plate 17 is fixedly installed with sealed box 10, pulley 11 is rotatably installed in sealed box 10, two guide pipes 7 are fixedly installed on sealed box 10, and the bottom of two guide pipes 7 is extended into sealed box 10, pull rope 9 is slidably installed on pulley 11, and pull rope 9 penetrates two guide pipes 7, and the two ends of pull rope 9 are extended to the outside of guide pipe 7.

[0021] In order to guide rotating plate 6, make rotating plate 6 more stable in recess 2, arc-shaped guide plate 4 is fixedly installed in recess 2, and the center of the curved portion of arc-shaped guide plate 4 coincides with the center of rotating rod 3.

[0022] In order to reduce the wear degree of pull rope 9, improve the service life of pull rope 9, lubricating oil is arranged in sealed box 10, three lubricating oil smearing rollers 16 are rotatably installed in sealed box 10, and three lubricating oil smearing rollers 16 are in contact with pull rope 9.

[0023] In order to prevent outside rain and dust from entering the sealed box 10 through the gap between the pull rope 9 and the guide pipe 7, affecting the service life of the pulley 11 and the lubricating oil smearing roller 16, two rubber sealing rings 8 are fixedly installed in the two guide pipes 7 respectively, and the two pull ropes 9 respectively penetrate the two rubber sealing rings 8 and are in sliding sealing connection with the inner walls of the two rubber sealing rings 8.

[0024] In order to facilitate people to add lubricating oil into the sealed box 10, an external thread oil filling pipe 14 is arranged on the top of the sealed box 10, and a rotary sealing cover 15 is threadedly installed on the external thread oil filling pipe 14.

[0025] The working principle of the bridge-gantry crane safety protection device is as follows: in the initial state, the torsion spring 5 is in a free state, the rotating plate 6 penetrates the observation opening 18, the sealed box 10 contains lubricating oil, and half of the lubricating oil smearing roller 16 is below the lubricating oil surface; when the device needs to be used, an external object is lifted by the hook 1; when the opening degree of the hook 1 gradually increases after long-term use, the hook 1 is bent downward, and the observation opening 18 is bent downward; when the hook 1 is bent downward to the extent that the rotating plate 6 is out of the observation opening 18, it indicates that the opening degree of the hook 1 reaches a scrap state, and the hook 1 is replaced in the first time, thereby reducing the safety hazard; when the device lifts the object, the pull rope 9 slides on the pulley 11 to drive the lubricating oil smearing roller 16 to rotate through friction, thereby continuously smearing the lubricating oil in the sealed box 10 on the pull rope 9, reducing the wear degree of the pull rope 9 through the lubricating oil, and improving the service life of the pull rope 9.

[0026] Compared with the related art, the bridge-gantry crane safety protection device has the following beneficial effects:

[0027] The bridge-gantry crane safety protection device provided by the utility model has the advantages that when the hook 1 is bent downward to the extent that the rotating plate 6 is out of the observation opening 18, it indicates that the opening degree of the hook 1 reaches a scrap state, and the hook 1 is replaced in the first time, thereby reducing the safety hazard; the pull rope 9 slides on the pulley 11 to drive the lubricating oil smearing roller 16 to rotate, continuously smearing the lubricating oil in the sealed box 10 on the pull rope 9, reducing the wear degree of the pull rope 9 through the lubricating oil, and improving the service life of the pull rope 9.

[0028] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for the skilled in the art, it still can be modified, or for part of the technical features of the equivalent replacement, the spirit and principles of the present application, made any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A safety protection device for a bridge crane, comprising a hook with a groove and an observation port on the hook, characterized in that: A rotating rod is rotatably installed within the groove. A rotating plate is fixedly sleeved on the rotating rod, and the rotating plate passes through and is movably connected to the observation opening. Two torsion springs are movably sleeved on the rotating rod, with the ends of the two torsion springs close to each other fixedly connected to the rotating plate, and the ends of the two torsion springs far apart from each other fixedly connected to the inner wall of the groove. A connecting plate is fixedly installed at the top of the hook, and a sealing box is fixedly installed at the top of the connecting plate. A pulley is rotatably installed inside the sealing box, and two guide tubes are fixedly installed on the sealing box, with the bottom ends of the two guide tubes extending into the sealing box. A pull rope is slidably installed on the pulley, and the pull rope passes through the two guide tubes, with both ends of the pull rope extending outside the guide tubes.

2. The safety protection device for a bridge crane according to claim 1, characterized in that: An arc-shaped guide plate is fixedly installed inside the groove.

3. The safety protection device for a bridge crane according to claim 2, characterized in that: The surface of the torsion spring is tin-plated.

4. A safety protection device for a bridge crane according to claim 3, characterized in that: The sealed box contains lubricating oil, and three lubricating oil application rollers are rotatably installed inside the sealed box, with all three lubricating oil application rollers in contact with the pull rope.

5. A safety protection device for a bridge crane according to claim 4, characterized in that: A rubber sealing ring is fixedly installed inside each of the two guide tubes, and the two pull ropes pass through the two rubber sealing rings respectively, and are slidably sealed to the inner walls of the two rubber sealing rings respectively.

6. A safety protection device for a bridge crane according to claim 5, characterized in that: The top of the sealed box is provided with an externally threaded oil filling pipe, and a rotating sealing cap is threaded onto the externally threaded oil filling pipe.

7. A safety protection device for a bridge crane according to claim 6, characterized in that: Rotating grooves are respectively provided on the inner walls of both sides of the groove. The two ends of the rotating rod extend into the two rotating grooves and are respectively fixedly fitted with bearings. The outer rings of the two bearings are respectively fixedly connected to the inner walls of the two rotating grooves.

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