Gantry crane cart walking track base plate structure

Abstract

The utility model discloses a gantry crane cart walking track base plate structure, belongs to the technical field of gantry crane tracks, and solves the problem that the service life of an existing track base plate structure is short. The device comprises a gasket, a plurality of screws, a pressing plate and a locking nut, and further comprises a plurality of elevation nuts, the screws are all pre-buried in a sinking groove formed in a foundation, each screw is in threaded connection with one elevation nut, the heights of the elevation nuts corresponding to the screws are the same, and the screws are connected with the pressing plate in a threaded mode. The screw rod above the elevation nut is sleeved with the gasket, the sinking groove in the periphery of the gasket is filled with a concrete track beam, the thickness of the gasket is larger than or equal to 20 mm, the length of the gasket is equal to that of a steel rail, and the portion, above the gasket, of each screw rod is sleeved with a pressing plate used for pressing the steel rail. According to the base plate structure of the cart walking track of the gantry crane, the deformation of the gasket can be obviously reduced, and the service life of track beam concrete is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gantry crane rails, and more specifically, to a gantry crane trolley traveling rail pad structure. Background Art

[0002] The tracks of large-tonnage gantry cranes usually use P-type railway rails or QU series crane special rails according to the different wheel pressures. Figure 1-2 As shown, the existing gantry crane trolley travel track pad structure has a steel rail 1' fixed to the concrete track beam 5' via pre-buried screws 2', locking nuts 3', and pressure plates 4'. Between the concrete track beam 5' and the bottom of the steel rail 1' is a gasket 6' used to adjust the horizontality of the steel rail 1' and bear the deadweight and wheel pressure of the steel rail 1'. The crane rail is a P38 railway rail with a bottom width of 114 mm. The contact area with the gasket is the load area, which is 114×200 mm. Based on a wheel diameter of 700 mm and a wheel pressure of 300KN, the pressure per unit area on the top of the gasket is 13.2N / mm2. This data is not large considering the minimum yield strength of the steel gasket of 2350N / mm2, and it seems safe to use.

[0003] However, due to errors in rail installation, various gaps, and the tightness of the locking nuts, the pressure plates and gaskets loosen after long-term operation of the crane, alternating rolling of the running wheels, and the superimposed dynamic alternating loads. The concrete track beam is crushed into powder, eventually sinking the foundation and reducing the straightness of the track, affecting the normal operation of the crane. The usual practice is to stop the crane after a period of use, adjust the gasket height, and retighten the pressure plate's locking nuts. However, repairing the concrete track beam below the gasket that has been dented by the rolling process is difficult. The entire track must be removed, leveled, and backfilled with concrete. The track must then dry and solidify before being reinstalled. This long repair cycle seriously impacts smooth production.

[0004] Therefore, it is urgent to design a gantry crane trolley walking track pad structure to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a gantry crane trolley walking track pad structure in view of the above-mentioned deficiencies in the prior art, which can significantly reduce the deformation of the pad and extend the service life of the track beam concrete.

[0006] The technical solution of the present utility model is as follows: a gantry crane trolley walking track pad structure, including a gasket, multiple screws, a pressure plate, a locking nut, and also multiple elevation nuts. The multiple screws are pre-buried in a sink groove provided in the foundation, and each of the screws is threadedly connected to an elevation nut. The elevation nuts corresponding to the multiple screws have the same height. The gasket is a steel plate of an integral structure, and the gasket is sleeved on the screw above the elevation nut. The sink groove around the gasket is filled with a concrete track beam. The thickness of the gasket is greater than or equal to 20 mm, and the length of the gasket is equal to the length of the rail. Each screw above the gasket is sleeved with a pressure plate for pressing the rail, and each screw above the pressure plate is threadedly connected to a locking nut. The sink groove above the concrete track beam is filled with a concrete protective layer covering the pressure plate and the locking nut.

[0007] As a further improvement, the top surface of the gasket is flush with the top surface of the concrete track beam.

[0008] Furthermore, the gasket is a segmented structure.

[0009] Furthermore, the gasket is a Q235 steel plate with a thickness of 20 mm, and the length of each section of the gasket is 2-3 m.

[0010] Furthermore, the gasket is provided with a positioning pin, and correspondingly, the pressure plate is provided with a positioning groove, and the positioning pin is movably inserted in the positioning groove.

[0011] Beneficial effects

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The utility model relates to a gantry crane trolley travel track pad structure, which supports the rails by using gaskets of more than 20 mm and extending the length of the gaskets, thereby greatly increasing the gaskets' resistance to deformation in the width direction of the rails, greatly reducing the pressure on the concrete track beams, significantly reducing the deformation of the gaskets, and extending the service life of the track beam concrete. Furthermore, by adding a concrete protective layer, not only can the pressure plates, gaskets, etc. be protected, but also both sides of the rails can be further reinforced, thereby further improving the structural strength of the track pads and further extending their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main cross-sectional structure of the prior art;

[0015] Figure 2 It is a schematic diagram of a top-view cross-sectional structure of the prior art;

[0016] Figure 3This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 4 This is a schematic diagram of a top-view cross-sectional structure of the present invention with the concrete protective layer removed;

[0018] Figure 5 for Figure 3 A magnified schematic diagram of the structure at point A.

[0019] in:

[0020] 1'-rail, 2'-screw, 3'-locking nut, 4'-pressing plate, 5'-concrete track beam, 6'-washer;

[0021] 1-rail, 2-screw, 3-locking nut, 4-pressure plate, 5-concrete track beam, 6-washer, 7-turntable, 8-elevation nut, 9-foundation, 10-sink, 11-locating pin, 12-locating slot. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0023] See Figure 3-5 , a gantry crane trolley walking track pad structure of this embodiment includes a gasket 6, a plurality of screws 2, a pressure plate 4, a locking nut 3, and a plurality of elevation nuts 7. The number of screws 2, pressure plates 4, locking nuts 3, and elevation nuts 7 is consistent. A plurality of screws 2 are pre-buried in a sinking groove 9 provided in the foundation 8. Each screw 2 is threadedly connected to an elevation nut 7. The elevation nuts 7 corresponding to the plurality of screws 2 have the same height. After the elevation nuts 7 are adjusted to the same height, they are fixed together by welding to prevent them from loosening. The gasket 6 is a steel plate of an integral structure. Only one gasket 6 is used in the thickness direction. Multiple pieces are not used to adjust the thickness and the horizontality of the track. To avoid the problem of gaps between adjacent gaskets and easy loosening, the gasket 6 is sleeved on the screw rod 2 above the elevation nut 7, and the sink groove 9 outside the gasket 6 is filled with concrete track beam 5. The thickness of the gasket 6 is greater than or equal to 20 mm. A thicker gasket is used as support to improve the structural strength, and the length of the gasket 6 is equal to the length of the rail 1. A pressure plate 4 for tightening the rail 1 is sleeved on each screw rod 2 above the gasket 6. The structure of the pressure plate 4 is the same as that of the prior art and will not be repeated here. A locking nut 3 is threadedly connected to the screw rod 2 above each pressure plate 4, and the sink groove 9 above the concrete track beam 5 is filled with a concrete protective layer 10 that covers the pressure plate 4 and the locking nut 3.

[0024] The utility model relates to a gantry crane trolley walking track pad structure, which supports the rails by using gaskets 6 with a thickness of more than 20 mm and extending the length of the gaskets 6. Calculated based on the wheelbase of the target crane of 1 meter, the pressure between the rails and the gaskets is reduced from 13.2 N / m2 to 5.2 N / m2, a decrease of 60%; the contact area between the gaskets and the concrete track beams is increased from 22,800 mm2 to 91,200 mm2, and the pressure is reduced from 13.2 N / m2 to 3.3 N / m2, a decrease of 75%, so that the gaskets have a greatly increased resistance to deformation along the width direction of the rails, greatly reducing the pressure on the concrete track beams, significantly reducing the deformation of the gaskets, and extending the service life of the track beam concrete; and by adding a concrete protective layer, not only can the pressure plates, gaskets, etc. be protected, but also both sides of the rails can be further reinforced, thereby further improving the structural strength of the track pads and further extending their service life.

[0025] Preferably, the top surface of the gasket 6 is flush with the top surface of the concrete track beam 5 , so that the concrete track beam 5 can well wrap the gasket 6 , thereby improving the stability of the installation of the gasket 6 and facilitating the installation of the pressure plate 4 .

[0026] Preferably, the gasket 6 is a segmented structure, which is convenient for transportation and installation, and can also avoid the error caused by the installation of the whole piece, which leads to the problem of installation difficulty. Furthermore, the gasket 6 is a Q235 steel plate with a thickness of 20mm, which has better structural strength, and each segment of the gasket 6 is 2-3m long, which is more convenient for transportation and installation.

[0027] Preferably, a positioning pin 11 is provided on the gasket 6, and correspondingly, a positioning groove 12 is provided on the pressure plate 4, wherein the positioning pin 11 is movably inserted in the positioning groove 12 to position the pressure plate 4 and prevent the pressure plate 4 from deflecting when the locking nut 3 is tightened.

[0028] The track pad structure in this embodiment, during construction:

[0029] (1) The crane stops and is locked by the rail end;

[0030] (2) Remove the locking nut 3' and the pressure plate 4' of the track;

[0031] (3) Lift the rail 1';

[0032] (4) Use an air shovel to clean the concrete track beam 5' and remove the old track gasket 6';

[0033] (5) Adjust the track elevation nuts 7 so that all elevation nuts 7 have the same height and weld them to prevent changes;

[0034] (6) Pound the concrete track beam 5 of appropriate grade, smooth it with the top of the elevation nut 7, and water it every day for 7-9 days;

[0035] (7) Cutting of new pads: Use 20mm thick Q235 steel plates, cut into 300mm wide and 2-3m long strips, ensure the flatness of the strips is less than 2mm, and cut and press them according to the actual sample after transporting them to the installation site, with 4 corresponding bolt holes;

[0036] (8) Install new gasket 6, rail 1, pressure plate 4, tighten the lock nut 3 appropriately, adjust the span and straightness, and finally tighten;

[0037] (9) After completion, a lightweight, low-grade concrete protective layer 10 is made.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention. These modifications and improvements will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A gantry crane trolley travel track pad structure, comprising a gasket (6), a plurality of screws (2), a pressure plate (4), and a locking nut (3), characterized in that: It also includes a plurality of elevation nuts (7), a plurality of screw rods (2) are pre-buried in a sinking groove (9) provided in the foundation (8), each of the screw rods (2) is threadedly connected to a elevation nut (7), and the elevation nuts (7) corresponding to the plurality of screw rods (2) have the same height. The gasket (6) is a steel plate of an integral structure, and the gasket (6) is sleeved on the screw rod (2) above the elevation nut (7), and the sinking groove (9) outside the gasket (6) is filled with a concrete track. The concrete track beam (5) is provided with a spacer (6) having a thickness greater than or equal to 20 mm and a length equal to that of the rail (1). Each screw rod (2) above the spacer (6) is provided with a pressure plate (4) for pressing the rail (1). A locking nut (3) is threadedly connected to the screw rod (2) above each pressure plate (4). A concrete protective layer (10) covering the pressure plate (4) and the locking nut (3) is filled in the sinking groove (9) above the concrete track beam (5).

2. A gantry crane trolley travel track pad structure according to claim 1, characterized in that: The top surface of the gasket (6) is flush with the top surface of the concrete track beam (5).

3. The gantry crane trolley travel track pad structure according to claim 1, characterized in that: The gasket (6) is a segmented structure.

4. A gantry crane trolley travel track pad structure according to claim 3, characterized in that: The gasket (6) is a Q235 steel plate with a thickness of 20 mm, and the length of each section of the gasket (6) is 2-3 m.

5. A gantry crane trolley travel track pad structure according to any one of claims 1 to 4, characterized in that: The gasket (6) is further provided with a positioning pin (11), and correspondingly, the pressure plate (4) is further provided with a positioning groove (12), and the positioning pin (11) is movably inserted into the positioning groove (12).

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