Single-rail crane double-rail bearing lifting beam

Abstract

The utility model relates to a monorail crane double-track bearing lifting beam which comprises a middle frame beam and two combination beams arranged in a front-back mode, and a plurality of load trolleys walking on tracks are arranged on the combination beams. The two ends of the middle frame beam are connected with the two combination beams through lifting chains respectively, the connecting lifting points, on the combination beams, of the lifting chains are located under the rails, the middle frame beam is connected with two lifting hook chains arranged front and back, and lifting hooks are installed at the lower ends of the lifting hook chains. Double rails of the monorail crane are arranged in parallel, the hoisting weight of the monorail crane is increased, and the problem of overall transportation of the oversize hydraulic support is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of single-track cranes, in particular to a single-track crane double-rail bearing lifting beam. Background Art

[0002] One of the most important functions of single-track crane transportation is the overall transportation of hydraulic supports, including tracks, locomotives, and lifting beams. The tracks are installed and fixed to the roadway roof through chain locks to form a track line. The locomotive runs on the tracks and completes the transportation of hydraulic supports through the lifting beam.

[0003] However, the current load-bearing and transportation capacity of the single-track crane system far lags behind the heavy-duty development of hydraulic supports. The main reason is that domestic single-track crane tracks have always used German standard I140E and I140V special steel rails. I140V is a heavy-duty track, corresponding to the standard DIN 20593-3 2004, which was compatible with the then roadway support technology and hydraulic development level. The track load-bearing capacity and the structure of the lifting beam determine that the upper limit of the overall transportation weight of hydraulic supports is about 50 tons. In recent years, with the rapid development of domestic coal mining technology, extra-large hydraulic supports weighing more than 100 tons have become common in domestic coal mines. Before new specifications of heavy-duty tracks are introduced in the industry, using two tracks to jointly bear the load becomes one of the optional ways to solve the overall transportation of extra-large hydraulic supports. When using two tracks for synchronous transportation, it is necessary to improve the lifting beam of each single-track crane. Summary of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the utility model provides a single-track crane double-rail bearing lifting beam.

[0005] The utility model is realized through the following technical solutions: A single-track crane double-rail bearing lifting beam is provided, which includes a middle beam and two combined beams arranged front and back. A plurality of load trolleys walking on the tracks are installed on the combined beams. Both ends of the middle beam are respectively connected to the two combined beams through lifting chains, and the connection suspension points of the lifting chains on the combined beams are located directly below the tracks. Two hook chains arranged front and back are connected to the middle beam, and hooks are installed at the lower ends of the hook chains.

[0006] In this solution, the load trolleys on the two combined beams are responsible for walking on the tracks, thereby driving the entire lifting beam to walk. The middle beam is hung on the two combined beams through two lifting chains, and the suspension points are located directly below the tracks, so that the gravity of the hoisting directly acts on the tracks. The hooks at the lower ends of the hook chains realize the hoisting operation of the equipment.

[0007] As an optimization, the upper end of the hook chain is connected to the middle frame beam through a balancing oil cylinder, and the inner chambers of the two balancing oil cylinders are connected through an oil pipe. In this scheme, one end of the balancing oil cylinder is connected to the hook chain, and the other end is connected to the middle frame beam. The balancing oil cylinder is a single-acting oil cylinder. During lifting, gravity compresses the inner chamber of the balancing oil cylinder. In this scheme, the two inner chambers are connected through an oil pipe because during transportation, due to the unevenness of the lanes and tracks and the shaking of the hydraulic support, it is easy to cause uneven force on the two chains. Some chains are less stressed or even the hook is detached, and some chains are overstressed, causing the support to tilt or the chain to break. The two inner chambers are connected through an oil pipe, which can realize automatic balance adjustment of the tension of multiple chains. The chain with high tension increases the pressure in the inner chamber of the oil cylinder, and the oil enters the oil cylinder with low pressure through the connecting pipeline, the piston rod is extended, and the chain tension is reduced; on the contrary, the oil capacity of the oil cylinder with low pressure is forced to increase, the piston rod retracts, and the chain tension increases until it is basically consistent with the tension of other chains.

[0008] As an optimization, a one-way throttle valve is installed on the pipeline of the balancing oil cylinder. The one-way throttle valve provided in this scheme is not subject to resistance when the oil flows out, and plays a throttling effect when the oil flows in.

[0009] As an optimization, the two ends of the middle frame beam are respectively equipped with a push cylinder that can be extended and retracted toward the middle of the middle frame beam, the telescopic shaft of the push cylinder is equipped with a moving sprocket, the end of the middle frame beam is equipped with a fixed sprocket, and the lifting chain passes through the fixed sprocket and the moving sprocket in sequence downward and then connects to the middle frame beam. The extension and retraction of the push cylinder in this solution can drive the lifting and lowering of the middle frame beam.

[0010] As an optimization, the two composite beams are connected by a connecting rod, so as to achieve synchronous movement between the two composite beams.

[0011] As an optimization, the composite beam includes a load-bearing main beam extending forward and backward, the lifting chain is connected to the middle of the load-bearing main beam, the end of the load-bearing main beam is hinged to the transition beam through a hinge shaft extending left and right, the middle of the transition beam is hinged to the middle of the trolley beam through a vertical hinge shaft, and the front and rear ends of the trolley beam are both equipped with load trolleys. In this solution, trolley beams are installed at the front and rear ends of the load-bearing main beam, and load trolleys are installed at the front and rear ends of the trolley beam, so that the support of the load-bearing main beam is achieved through multiple load trolleys, and the hinged structure is used to adapt to turning and uphill and downhill.

[0012] As an optimization, the front and rear ends of the trolley beam are equipped with lever beams, and the front and rear ends of the lever beam are equipped with load trolleys. Thus, through the lever beam, two load trolleys are installed on each trolley beam, thereby increasing the number of load trolleys.

[0013] The beneficial effects of the present utility model are as follows: A single-rail crane double-rail bearing lifting beam of the present utility model can realize the combined use of two lifting beams, achieve the double-rail parallel arrangement of the single-rail crane, increase the lifting weight of the single-rail crane, and solve the problem of the overall transportation of extra-large hydraulic supports. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the present utility model;

[0015] Figure 2 It is a front view of the present utility model;

[0016] Figure 3 It is a side view of the present utility model;

[0017] Figure 4 It is a front view of the combined beam of the present utility model;

[0018] Figure 5 It is a top view of the combined beam of the present utility model;

[0019] Figure 6 It is an end view of the middle beam of the present utility model;

[0020] Figure 7 It is a connection schematic diagram of the balance oil cylinder of the present utility model;

[0021] As shown in the figure:

[0022] 1. Combined beam, 11. Load-bearing main beam, 12. Transition beam, 13. Trolley beam, 14. Lever beam, 15. Load trolley, 2. Lifting chain, 3. Middle beam, 31. Fixed sprocket, 32. Pushing oil cylinder, 33. Moving sprocket, 4. Balance oil cylinder, 5. Hook chain, 6. Hook, 7. Track, 8. Connecting rod, 9. Hydraulic support. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] To clearly illustrate the technical features of this solution, the following will elaborate on this solution through specific embodiments.

[0024] As Figures 1 - 7 shown, a single-rail crane double-rail bearing lifting beam of the present utility model includes a middle beam 3 and two combined beams 1 arranged front and back. The two combined beams 1 are connected by a connecting rod 8 to achieve synchronous movement. The two ends of the middle beam 3 are respectively connected to the two combined beams 1 through lifting chains 2, and the connection lifting points of the lifting chains 2 on the combined beams 1 are located directly below the track 7.

[0025] The combined beam 1 is located below the track 7, and a plurality of load trolleys 15 moving on the track 7 are installed on the combined beam 1. The load trolley 15 is a common structure of the existing single-rail crane, with a plurality of running wheels moving on the track 7 installed on it. The load trolley 15 is prior art and will not be introduced in detail.

[0026] like Figure 4 , 5 As shown, the composite beam 1 includes a load-bearing main beam 11 extending forward and backward, and the load-bearing main beam 11 is located directly below the track 7. The lifting chain 2 is connected to the middle of the load-bearing main beam 11, so that the connection point between the lifting chain 2 and the load-bearing main beam 11 is located directly below the track 7.

[0027] like Figure 5 As shown, the end of the load-bearing main beam 11 is hinged to the transition beam 12 through a hinge axis extending left and right. The transition beam 12 extends left and right. The end of the load-bearing main beam 11 is a fork-shaped structure. The two transverse rotating axes of the transition beam 12 are respectively axially connected to the two forks of the fork-shaped structure, thereby realizing the hinge connection between the transition beam 12 and the load-bearing main beam 11.

[0028] The middle part of the transition beam 12 is hinged to the middle part of the trolley beam 13 through a vertical hinge axis. The trolley beam 13 is a long strip extending forward and backward. The middle position in the length direction passes through the transition beam 12, and the middle position of the trolley beam 13 is connected to the transition beam 12 through a vertical rotating shaft, thereby realizing the hinge connection between the trolley beam 13 and the transition beam. The trolley beam 13 can swing left and right relative to the transition beam 12, and at the same time, the trolley beam 13 can swing up and down relative to the load-bearing main beam 11 through the transition beam 12.

[0029] The front and rear ends of the trolley beam 13 are both equipped with a load trolley 15. Specifically, Figure 4 As shown, the front and rear ends of the trolley beam 13 described in this embodiment are equipped with lever beams 14, the lever beam 14 extends forward and backward, the middle position of the lever beam 14 is hinged to the hanging shaft through a hinge shaft extending left and right, the lower end of the hanging shaft is connected to the end of the trolley beam 13, and the hanging shaft can be rotatably connected to the trolley beam 13 along the vertical rotating shaft, thereby realizing the connection between the lever beam 14 and the trolley beam 13, and the front and rear ends of the lever beam 14 are equipped with load trolleys 15, so that one combined beam 1 is connected to the track through 8 load trolleys 15, thereby improving the carrying capacity.

[0030] The two ends of the middle frame beam 3 are connected to the two composite beams 1 through the lifting chains 2 respectively. Figure 2 , 6 As shown, both ends of the middle frame beam 3 are respectively equipped with a push cylinder 32 which is telescopic toward the middle of the middle frame beam 3. The push cylinder 32 is horizontally arranged and extends forward and backward. The cylinder body is fixedly connected to the end of the middle frame beam 3. A moving sprocket 33 is installed on the telescopic shaft of the push cylinder 32. A fixed sprocket 31 is installed at the end of the middle frame beam 3. The fixed sprocket 31 is located directly below the lifting chain 2.

[0031] like Figure 6As shown, the lifting chain 2 sequentially bypasses the fixed sprocket 31 and the moving sprocket 33 downward and then is connected to the middle frame beam 3, so that the height of the end of the middle frame beam 3 can be adjusted by the telescopic movement of the pushing oil cylinder 32.

[0032] Two hook chains 5 arranged front and back are connected to the middle frame beam 3. Hooks 6 are installed at the lower ends of the hook chains 5, and the hooks are used to realize the hoisting operation of the equipment.

[0033] The upper ends of the hook chains 5 are connected to the middle frame beam 3 through balance oil cylinders 4, and the inner cavities of the two balance oil cylinders 4 are communicated through oil pipes. The balance oil cylinder is a single-acting oil cylinder. During hoisting, gravity compresses the inner cavity of the balance oil cylinder. In this solution, the two inner cavities are communicated through oil pipes because during transportation, due to the unevenness of the roadway and track, and the shaking of the hydraulic support, it is easy to cause uneven forces on the two chains. Some chains have reduced forces or even the hooks are disengaged, while some chains are overloaded, causing the support to tilt or the chain to break. The two inner cavities are communicated through oil pipes, which can realize the automatic balance adjustment of the tension of multiple chains. The chain with a large tension increases the pressure in the inner cavity of the oil cylinder, and the oil fluid enters the oil cylinder with a small pressure through the communication pipeline, and the piston rod extends, reducing the chain tension; conversely, for the oil cylinder with a small pressure, the oil fluid capacity in the inner cavity is forced to increase, the piston rod retracts, and the chain tension increases until it is basically the same as the tension of other chains.

[0034] As Figure 7 shown, a one-way throttle valve is installed on the pipeline of the balance oil cylinder 4, which has no resistance when the oil fluid flows out and has a throttling effect when the oil fluid flows in.

[0035] The usage method of the present utility model:

[0036] The load trolleys 15 on the two combined beams 1 are responsible for walking on the track 7, thereby driving the entire lifting beam to move. The middle frame beam 3 is hung on the two combined beams 1 through two lifting chains 2, and the hanging points are located directly below the track 7, so that the hoisting gravity directly acts on the track 7. By the telescopic movement of the pushing oil cylinder 32, the lifting and lowering of the middle frame beam 3 can be driven, and the hook 6 at the lower end of the hook chain 5 realizes the hoisting operation of the equipment.

[0037] Of course, the above description is not limited to the above examples. The technical features not described in the present utility model can be realized by or adopted the existing technology, and will not be elaborated here; the above embodiments and drawings are only used to illustrate the technical solutions of the present utility model and are not a limitation to the present utility model. The present utility model 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 utility model do not depart from the purpose of the present utility model and should also fall within the scope of the protection of the claims of the present utility model.

Claims

1. A single-rail hoist double-rail bearing lifting beam, characterized in that: It includes a middle beam (3) and two combined beams (1) arranged front and back. A plurality of load trolleys (15) walking on rails (7) are installed on the combined beams (1). Both ends of the middle beam (3) are respectively connected to the two combined beams (1) through hoisting chains (2), and the connection lifting points of the hoisting chains (2) on the combined beams (1) are located directly below the rails (7). Two hook chains (5) arranged front and back are connected to the middle beam (3), and hooks (6) are installed at the lower ends of the hook chains (5).

2. The single-rail hoist double-rail bearing lifting beam according to claim 1, characterized in that: The upper ends of the hook chains (5) are connected to the middle beam (3) through balance oil cylinders (4), and the inner cavities of the two balance oil cylinders (4) are communicated through oil pipes.

3. A single-rail crane double-rail load-bearing lifting beam according to claim 2, characterized in that: One-way throttle valves are installed on the pipelines of the balance oil cylinders (4).

4. A single-rail hoist double-rail load-bearing hoisting beam according to claim 1, characterized in that: Both ends of the middle beam (3) are respectively equipped with push cylinders (32) that telescopically move towards the middle of the middle beam (3). Driving sprockets (33) are installed on the telescopic shafts of the push cylinders (32), and fixed sprockets (31) are installed at the ends of the middle beam (3). The hoisting chains (2) sequentially bypass the fixed sprockets (31) and the driving sprockets (33) downward and then are connected to the middle beam (3).

5. A single-rail hoist double-rail bearing lifting beam according to claim 1, characterized in that: The two combined beams (1) are connected through a connecting rod (8).

6. The single-rail hoist double-rail bearing lifting beam according to claim 1, characterized in that: The combined beam (1) includes a load-bearing main beam (11) extending front and back. The hoisting chain (2) is connected to the middle of the load-bearing main beam (11). The end of the load-bearing main beam (11) is hinged to a transition beam (12) through a hinged shaft extending left and right. The middle of the transition beam (12) is hinged to the middle of a trolley beam (13) through a vertical hinged shaft. Load trolleys (15) are installed at both the front and rear ends of the trolley beam (13).

7. The single-rail hoist double-rail bearing lifting beam according to claim 6, characterized in that: Lever beams (14) are installed at both the front and rear ends of the trolley beam (13), and load trolleys (15) are installed at both the front and rear ends of the lever beams (14).

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