A safety device for preventing displacement of a bridge girder

Abstract

The utility model provides a kind of for preventing bridge-erecting machine displacement's limit safety device, including base, two oppositely arranged upper lifting lugs fixed on base, two lower lifting lugs, upper screw rod and lower screw rod, two lower lifting lugs are respectively located the outside of two upper lifting lugs, upper lifting lug and lower lifting lug are all provided with the hole for upper screw rod to pass, upper screw rod penetrates upper lifting lug and lower lifting lug, lower lifting lug has two degrees of freedom on upper screw rod, one is that lower lifting lug can rotate in longitudinal direction around upper screw rod, another is that lower lifting lug can move along the axial direction of upper screw rod;The outside of each lower lifting lug is provided with two oppositely arranged ribbed plates, the lower part of ribbed plate projects below lower lifting lug bottom, the part of ribbed plate projecting below lower lifting lug has track clamping groove, lower lifting lug is provided with the hole for lower screw rod to pass, lower screw rod is provided with locking nut on it.The utility model has the beneficial effects of convenient installation and high stability, can guarantee the safety and stability of bridge-erecting machine shutdown state.

Description

Technical Field

[0001] This utility model relates to a limiting safety device for preventing displacement of a bridge erecting machine. Background Technology

[0002] When using a bridge erecting machine to dismantle bridge girders crossing existing operational railways on urban expressways, there are time constraints for railway closure construction. It is necessary to ensure that the bridge erecting machine is locked promptly after the girders are dismantled within the specified time. Locking and unlocking must be quick to meet the needs of repeated use. Simultaneously, the locking device should allow for rapid detection of any displacement of the bridge erecting machine, ensuring overall safety and stability after the machine stops operating. Existing technology typically uses movable iron shoes to restrict the movement of the reducer's traveling wheels. However, this method has drawbacks: the outer contour of the reducer wheel box of the bridge erecting machine is usually some distance from the traveling wheels, making it difficult for ordinary iron shoes to adhere tightly to the wheels, resulting in poor locking performance. Furthermore, traditional movable iron shoes are prone to slipping and difficult to monitor for displacement. Summary of the Invention

[0003] The problem to be solved by this utility model is to provide a limiting safety device for preventing displacement of a bridge erecting machine, which overcomes the shortcomings of the prior art.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a limiting safety device for preventing displacement of a bridge erecting machine, comprising a base, two oppositely arranged upper lifting lugs, two lower lifting lugs, an upper screw, and a lower screw, all fixed on the base. The two lower lifting lugs are respectively located outside the two upper lifting lugs. Both the upper and lower lifting lugs have holes for the upper screw to pass through. The upper screw passes through the upper and lower lifting lugs. The lower lifting lug has two degrees of freedom on the upper screw: one is that the lower lifting lug can rotate longitudinally around the upper screw, and the other is that the lower lifting lug can move axially along the upper screw.

[0005] Each of the lower lifting lugs has two opposing ribs on its outer side. The lower part of the ribs extends below the bottom of the lower lifting lug. The portion of the ribs extending below the lower lifting lug has a track groove. The lower lifting lug has a hole for the lower screw to pass through. A locking nut is fitted onto the lower screw.

[0006] Optionally, it also includes a limiting plate that cooperates with the locking nut. The locking nut has a hexagonal cross-section, and the hole through which the lower screw passes is located between two opposing ribs. The top of the rib has a slot, and the two sides of the limiting plate have locking strips that are adapted to the slot. The limiting plate has a nut slot that extends through the bottom and front and rear of the limiting plate. The nut slot is a part of a hexagon that is adapted to the locking nut. When the locking strip extends into the slot, the nut slot can be engaged with the locking nut.

[0007] The advantages and positive effects of this utility model are: the device is welded together with the reducer wheel box of the bridge erecting machine and moves synchronously with the bridge erecting machine. After the bridge erecting machine stops working, it can be quickly installed to achieve locking. At the same time, the bolts can be observed at any time to determine whether the locking status is good. The device is easy to install and has high stability, which can ensure the safety and stability of the bridge erecting machine when it is stopped. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of this utility model;

[0009] Figure 2 This is a schematic diagram of the overall structure of the second specific embodiment of this utility model;

[0010] Figure 3 yes Figure 2 A schematic diagram of the decomposed structure;

[0011] In the diagram: 1. Base; 2. Upper lifting lug; 3. Upper screw; 4. Lower screw; 4-1. Locking nut; 5. Lower lifting lug; 5-1. Rib plate; 5-2. Track slot; 5-3. Slot; 6. Limiting block; 6-1. Locking strip; 6-2. Nut slot. Detailed Implementation

[0012] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention. In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

[0013] like Figure 1As shown, this utility model provides a limiting safety device for preventing displacement of a bridge erecting machine, including a base 1, two oppositely arranged upper lifting lugs 2, two lower lifting lugs 5, an upper screw rod 3, and a lower screw rod 4 fixed on the base 1. The two lower lifting lugs 5 are respectively located outside the two upper lifting lugs 2. Both the upper lifting lugs 2 and the lower lifting lugs 5 have holes for the upper screw rod 3 to pass through. The upper screw rod 3 passes through the upper lifting lugs 2 and the lower lifting lugs 5. The lower lifting lugs 5 have two degrees of freedom on the upper screw rod 3. One is that the lower lifting lugs 5 can rotate longitudinally around the upper screw rod 3, and the other is that the lower lifting lugs 5 can move axially along the upper screw rod 3.

[0014] Each lower lifting lug 4 has two opposing ribs 5-1 on its outer side. The lower part of the rib 5-1 extends below the bottom of the lower lifting lug 5. The part of the rib 5-1 extending below the lower lifting lug 5 has a track groove 5-2. The lower lifting lug 5 has a hole for the lower screw 4 to pass through. A locking nut 4-1 is fitted on the lower screw 4.

[0015] The above-mentioned device is used as follows: the base plate 1 is welded to the reducer wheel box of the bridge erecting machine. When the bridge erecting machine is running, the lower lifting lug 5 is vertically rotated and placed on the upper lifting lug 2, so that the device moves synchronously with the bridge erecting machine. The limiting device is not easy to slip off and meets the needs of use at any time. After the bridge erecting machine stops working, the lower lifting lug 5 is manually rotated vertically again so that the track groove 5-2 at the bottom of the lower lifting lug locks the transverse track (e.g., Figure 2 After the lower lifting lug 5 is engaged with the transverse track, the locking nut 4-1 on the lower screw 4 is tightened manually, so that the two lower lifting lugs 5 move relative to each other until they are in close contact with the transverse track, thus achieving locking. At the same time, a marking line is drawn on the lower bolt 4 and the locking nut 4-1 with a marker pen. The tightness of the lower bolt 4 is judged by observing the misalignment of the marking line, thereby judging the stability of the locking of the bridge erecting machine. Before the bridge erecting machine runs again, the locking nut 4-1 on the lower screw 4 is loosened manually, and then the lower lifting lug 5 is rotated vertically to be placed on the upper lifting lug 2, thus achieving unlocking.

[0016] To prevent the fastening nut 4-1 from loosening when the device is locked with the transverse track, a limiting plate 6 is added to the above structure, such as... Figure 2 , Figure 3As shown, the locking nut 4-1 has a hexagonal cross-section. The hole through which the lower screw 4 passes is located between two opposing ribs 5-1. The top of the rib 5-1 has a groove 5-3. The two sides of the limiting plate 6 have locking strips 6-1 that fit the grooves 5-3. The limiting plate 6 has a nut groove 6-2 that penetrates the bottom and front and rear of the limiting plate 6. The nut groove 6-2 is part of a hexagon that fits the locking nut 4-1. When the locking strip 6-1 extends into the groove 5-3, the nut groove 6-2 can be locked onto the locking nut 4-1. After the locking nut 4-1 is locked, the nut groove 6-2 on the limiting plate 6 is locked onto the locking nut 4-1. Because the locking nut 4-1 has a hexagonal structure, the locking nut 4-1 locked in the nut groove 6-2 cannot rotate under the action of the limiting plate 6, thereby preventing the locking nut 4-1 from loosening.

[0017] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A limiting safety device for preventing displacement of a bridge erecting machine, characterized in that: The device includes a base, two opposing upper lifting lugs fixed to the base, two lower lifting lugs, an upper screw, and a lower screw. The two lower lifting lugs are located outside the two upper lifting lugs respectively. Each upper and lower lifting lug has a hole through which the upper screw passes. The upper screw passes through the upper and lower lifting lugs. Each lower lifting lug has two degrees of freedom on the upper screw: one is that the lower lifting lug can rotate longitudinally around the upper screw, and the other is that the lower lifting lug can move axially along the upper screw. Each of the lower lifting lugs has two opposing ribs on its outer side. The lower part of the ribs extends below the bottom of the lower lifting lug. The portion of the ribs extending below the lower lifting lug has a track groove. The lower lifting lug has a hole for the lower screw to pass through. A locking nut is fitted onto the lower screw.

2. The limiting safety device for preventing displacement of a bridge erecting machine according to claim 1, characterized in that: It also includes a limiting plate that works in conjunction with the locking nut. The locking nut has a hexagonal cross-section, and the hole through which the lower screw passes is located between two opposing ribs. The top of the rib has a slot, and the two sides of the limiting plate have locking strips that fit the slots. The limiting plate has a nut slot that extends through the bottom and front and rear of the limiting plate. The nut slot is a part of a hexagon that fits the locking nut. When the locking strips are inserted into the slots, the nut slots can engage with the locking nut.

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