A device for preventing the falling of a desulfurization spray gun trolley after it hits the top

Abstract

The present invention relates to a device for preventing a desulfurization spray gun trolley from falling after hitting the top, which includes a fixed seat and a safety hook located above the upper safety limit. The fixed seat is fixedly arranged, and the safety hook is hinged to the fixed seat through a horizontally arranged pin shaft. The safety hook includes a hook handle located above the pin shaft and a hook head located below the pin shaft. In the natural state, the hook handle is located on the moving track of the trolley, the hook head is located on one side of the moving track of the trolley, and the opening of the hook head faces the side where the trolley is located. A hook groove adapted to the hook head is provided on the trolley. When the trolley is in the position of hitting the top, the hook head is stuck into the hook groove. The structure of the present invention is simple, easy to manufacture and install. The hook handle is used as the triggering component, and the hook head is used as the anti-falling support. Since the hook handle and the hook head are integral parts, the response is timely and effective, which can better ensure the safe operation of the equipment and provide an essential guarantee for the safety of the equipment and personnel.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical equipment, and particularly relates to a device for preventing a desulfurization lance trolley from falling after hitting the top. Background Art

[0002] In iron and steel smelting, hot metal needs to be pretreated before entering a converter or an electric furnace to remove impurity elements or recover valuable elements. Such hot metal treatment processes include hot metal desiliconization, desulfurization, dephosphorization (commonly known as "three desulfurizations"), as well as hot metal vanadium extraction, niobium extraction, tungsten extraction, etc.

[0003] In pretreatment equipment, the lance lifting trolley is an important piece of equipment. It has a harsh working environment, with high temperature, a lot of dust, and large vibrations. To ensure safety, generally two safety limits, namely an upper safety limit and a lower safety limit, are set on the trolley lifting frame to prevent the trolley from hitting the top. However, precisely because the working environment conditions of the trolley are extremely harsh, there are sometimes situations where both safety limits fail simultaneously, resulting in the trolley falling after hitting the top. Therefore, the safety of the lance lifting has not yet reached complete intrinsic safety. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a device for preventing a desulfurization lance trolley from falling after hitting the top, which avoids the trolley from falling after hitting the top when both safety limits fail.

[0005] The present invention is realized through the following technical solutions. A device for preventing a desulfurization lance trolley from falling after hitting the top is provided, which includes a fixed seat and a safety hook located above the upper safety limit. The fixed seat is fixedly arranged. The safety hook is hinged to the fixed seat through a horizontally arranged pin shaft. The safety hook includes a hook handle located above the pin shaft and a hook head located below the pin shaft. In the natural state, the hook handle is located on the moving track of the trolley, the hook head is located on one side of the moving track of the trolley, and the opening of the hook head faces the side where the trolley is located. A hook groove adapted to the hook head is provided on the trolley. When the trolley is in the position of hitting the top, the hook head is caught in the hook groove.

[0006] In this solution, the safety hook is hinged to the fixed seat, so that the safety hook can freely rotate around the axis of the pin shaft. The natural state refers to the state without external force and under its own gravity. During the upward movement of the trolley, the hook handle is collided, causing the hook head to rotate towards the trolley. When the trolley reaches the position of hitting the top, the hook head is caught in the hook groove. When the lifting chain or wire rope breaks due to the trolley hitting the top, the hook head will hook the trolley to prevent the trolley from falling.

[0007] As an optimization, the side of the hook handle facing the opening of the hook head is provided with an outwardly convex touch arc. In the natural state, the touch arc is located above the trolley. This optimized solution sets the touch arc as the contact part with the trolley, making the surface where the hook handle contacts the trolley an arc surface, increasing the smoothness of the relative movement between the trolley and the hook handle, and improving the reliability of the trolley pushing the hook handle to rotate.

[0008] As an optimization, the fixed seat includes a seat plate and two vertical plates welded to the bottom surface of the seat plate, and the safety hook passes through between the two vertical plates. The fixed seat of this optimization scheme has a simple structure and is convenient to manufacture, and is suitable for use in workshop transformation. Passing the safety hook through between the two vertical plates improves the consistency of the forces on the two vertical plates.

[0009] As an optimization, four bolt holes are provided on the seat plate in a rectangular distribution, and fixing bolts are inserted through the bolt holes. This optimization scheme facilitates the fixing of the seat plate through the fixing bolts by setting the bolt holes and the fixing bolts, realizes the detachable of the fixed seat, and is convenient for position adjustment according to the actual production situation.

[0010] As an optimization, the included angle between the central axis of the opening of the hook head and the axis of the hook handle is 15° to 30°. With this optimization scheme, when the hook head hooks into the groove, the opening of the hook head inclines towards the hook handle side, preventing the hook head from slipping out of the groove.

[0011] The beneficial effects of the present invention are as follows: the structure is simple, the manufacturing and installation are convenient, the hook handle is used as the triggering component, and the hook head is used as the anti-falling support. Since the hook handle and the hook head are integral parts, the response is timely and effective, which can better ensure the safe operation of the equipment and provide an essential guarantee for the safety of the equipment and personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of the present invention;

[0013] Figure 2 is a schematic diagram of the working position of the present invention;

[0014] As shown in the figure:

[0015] 1. Fixed seat, 2. Pin shaft, 3. Safety hook, 4. Hook head, 5. Touching arc, 6. Hook handle, 7. Vertical plate, 8. Seat plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] To clearly illustrate the technical features of this solution, the following elaborates on this solution through specific embodiments.

[0017] As Figure 1 shown, a device for preventing the falling of a desulfurization spray gun trolley after hitting the top includes a fixed seat 1 and a safety hook 3 located above the upper safety limit. The fixed seat is fixedly arranged. The fixed seat in this embodiment includes a seat plate 8 and two vertical plates 7 welded to the bottom surface of the seat plate. The safety hook passes through between the two vertical plates. Four bolt holes are provided on the seat plate in a rectangular distribution, and fixing bolts are inserted through the bolt holes. The fixed seat is fixed to the trolley lifting frame through the fixing bolts.

[0018] The safety hook is processed from a steel plate with a thickness of 40 mm. The seat plate and the vertical plate are both processed from steel plates with a thickness of 20 mm. A pin hole with a diameter of 45 mm is opened on the vertical plate for the pin shaft to pass through.

[0019] The safety hook is hinged to the fixed seat through a horizontally arranged pin shaft 2. The safety hook includes a hook handle 6 above the pin shaft and a hook head 4 below the pin shaft. In the natural state, the hook handle is located above the horizontal line and on the moving track of the trolley. The hook head is located on one side of the moving track of the trolley, and the opening of the hook head faces the side where the trolley is located. A hook groove adapted to the hook head is provided on the trolley. The included angle between the central axis of the hook head opening and the axis of the hook handle is 15° - 30°. When the trolley is at the top dead center position, the hook head is caught in the hook groove. Fixed seats and safety hooks are provided on both sides of the moving track of the trolley. When the hook handle is in the vertical state, the horizontal distance between the two contact arcs is adapted to the width of the trolley.

[0020] To ensure the reliability of the rotation of the hook handle triggered by the trolley, in this embodiment, an outwardly convex contact arc 5 is provided on the side of the hook handle facing the opening of the hook head. In the natural state, the contact arc 5 is located above the trolley. When the trolley rises to a certain height, it contacts the contact arc, thereby causing the safety hook to rotate.

[0021] The whole device is installed above the spray gun lifting trolley frame. When the trolley continues to move upward when two safety limiters fail, the vehicle body will touch the contact arc of the hook handle part of the safety hook, forcing the hook head below the safety hook to penetrate into the groove of the trolley body. Once the lifting chain or wire rope breaks, the hook head will hook the trolley to prevent it from falling.

[0022] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be realized by or adopted from the prior art, and will not be elaborated here; the above embodiments and drawings are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. The present invention has been described in detail with reference to the preferred embodiments. Those of ordinary skill in the art should understand that any changes, modifications, additions or substitutions made by those of ordinary skill in the art within the scope of the essence of the present invention do not depart from the purpose of the present invention and should also fall within the scope of the claims of the present invention.

Claims

1. A device for preventing a desulfurization spray gun trolley from falling after hitting the top, characterized in that: It includes a fixed seat (1) and a safety hook (3) located above the upper safety limit. The fixed seat is fixedly arranged. The safety hook is hinged to the fixed seat through a horizontally arranged pin shaft (2). The safety hook includes a hook handle (6) located above the pin shaft and a hook head (4) located below the pin shaft. The included angle between the central axis of the opening of the hook head and the axis of the hook handle is 15° to 30°. The side surface of the hook handle facing the side where the opening of the hook head is located is provided with an outwardly convex touch arc (5). In the natural state, the hook handle is located on the moving track of the trolley, the touch arc (5) is located above the trolley, the hook head is located on one side of the moving track of the trolley, and the opening of the hook head faces the side where the trolley is located. A hook groove adapted to the hook head is provided on the trolley. When the trolley is in the top position, the hook head is caught in the hook groove.

2. The device for preventing a desulfurization spray gun trolley from falling after hitting the top according to claim 1, characterized in that: The fixed seat includes a seat plate (8) and two vertical plates (7) welded to the bottom surface of the seat plate. The safety hook passes through between the two vertical plates.

3. The device for preventing a desulfurization spray gun trolley from falling after hitting the top according to claim 2, characterized in that: Four bolt holes are arranged in a rectangular distribution on the seat plate, and fixing bolts are passed through the bolt holes.

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