A step-type gantry crane and a method of using the same

Abstract

The application discloses a stepped gantry crane, which comprises a gantry crane one, a gantry crane two and a swing trolley, the gantry crane one and the gantry crane two are arranged on the swing trolley, a detachable safety fixing device is arranged between the trolley walking mechanism and the swing trolley, the swing trolley is arranged on a guide rail one of a beam manufacturing area, and a guide rail two arranged on the swing trolley is flush with a guide rail three of a beam storage area. The application can realize the transfer and ferry of the precast beam from the beam manufacturing area to the beam storage area under the condition that there is a step, the walking is fast and stable, two gantry cranes are used, and the transfer efficiency is high.

Description

Technical Field

[0001] This invention belongs to the field of crane technology and relates to a ladder-type gantry crane and its usage method. Background Technology

[0002] With the national rural revitalization and vigorous development of infrastructure construction, various engineering construction sections include urban subways, tunnels, mountain rivers, bridges, municipal elevated roads and other engineering conditions. Traditional gantry cranes run along fixed horizontal straight tracks, while there is still a gap in the availability of gantry cranes that can be installed and used in uneven mountainous areas. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a ladder-type gantry crane and its method of use, so as to solve the technical problems existing in the prior art.

[0004] The technical solution adopted in this invention is as follows: A ladder-type gantry crane, including a gantry crane 1, a gantry crane 2, and a swing trolley. The trolley traveling mechanisms of both the gantry crane 1 and the gantry crane 2 are placed on a swing trolley. A detachable safety fixing device is provided between the trolley traveling mechanism and the swing trolley. The swing trolley is placed on a guide rail 1 in the beam-making area. The guide rail 2 on the swing trolley is flush with the guide rail 3 in the beam-storage area.

[0005] Furthermore, the aforementioned safety fixing device includes an iron shoe and a chain, with one end of the chain fixedly connected to the top of the iron shoe and the other end of the chain fixedly connected to the trolley frame of the swing trolley.

[0006] Furthermore, the aforementioned iron shoe includes a base plate, a back plate, and an arc-shaped plate. Two back plates are welded to the rear upper surface of the base plate, and an inverted U-shaped part is provided at the rear bottom of the base plate. The diameter of the arc-shaped plate can fit with the traveling wheel of the trolley traveling mechanism of either gantry crane one or gantry crane two.

[0007] Furthermore, an electrical conversion control system is installed between the aforementioned electric shuttle trolley and the main vehicle traveling mechanism. The electrical conversion control system includes...

[0008] Furthermore, the aforementioned trolley traveling mechanism comprises four units, located at the four corners of the gantry crane and situated on two tracks.

[0009] A method of using a ladder-type gantry crane, the method comprising:

[0010] (1) Operation process of gantry crane 1 and gantry crane 2 from beam fabrication area to beam storage area under working conditions: When the gantry crane is in the beam fabrication area, the gantry crane and the transfer trolley are fixed by a safety fixing device. When the gantry crane is used in the beam fabrication area, the gantry crane travels by the transfer trolley. The trolley traveling mechanism and the lifting mechanism of the gantry crane can operate normally. When the gantry crane needs to move to the beam storage area, the crane is first moved to the 3.5-meter high step to complete the docking of the second track on the transfer trolley with the third track on the 3.5-meter high step. Then, the transfer flat car near the step is safely fixed to the ground. The safety fixing device between the gantry crane and the transfer flat car is released. The power supply device of the transfer trolley and the gantry crane is switched. The gantry crane 1 then moves to the 3.5-meter high step. Because it is in working condition, Gantry crane 1 and gantry crane 2 lift a 40m long precast beam. In this state, the trolley traveling mechanism of gantry crane 1 is in operation, and the fixed shuttle trolley of gantry crane 2 is in operation. After gantry crane 1 has traveled a certain distance on the step, the shuttle trolley of gantry crane 2 connects with the shuttle trolley of gantry crane 1. After the shuttle trolley of gantry crane 2 is safely fixed to the ground, the safety fixing device between gantry crane 2 and the shuttle trolley is released. Then, gantry crane 2 travels to the 3.5-meter high step through the two shuttle trolleys. The operation of the two gantry cranes on the step is the trolley traveling mechanism of the gantry cranes, thus completing the 3.5-meter high step crossing. After completion, the two shuttle trolleys do not need to be moved, which can facilitate the subsequent cranes' transition from the beam storage area to the beam fabrication area below the 3.5-meter high section.

[0011] (2) Operation process of gantry crane 1 and gantry crane 2 from beam storage area to beam fabrication area under working conditions: When the gantry crane is used in the beam storage area, the gantry crane operates as the crane's trolley traveling mechanism. When it needs to move to the beam fabrication area, gantry crane 1 and gantry crane 2 have been secured using the method in step (1). Gantry crane 2 is moved to a transfer trolley away from the steps, and gantry crane 1 is moved to a transfer trolley close to the steps. Then, the gantry crane and the transfer trolley are secured using a safety fixing device. Then, the two transfer trolleys are released from the ground. Then, gantry crane 1 and gantry crane 2 run on track 1 in the beam fabrication area via the transfer trolley. That is, gantry crane 1 and gantry crane 2 complete the transition from the beam storage area to the beam fabrication area.

[0012] The beneficial effects of this invention are as follows: Compared with the prior art, this invention can realize the transfer and transportation of precast beams from the beam fabrication area to the beam storage area when there are steps. The movement is fast and stable, and the two gantry cranes have high transfer efficiency. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the layout of the beam fabrication area and the beam storage area;

[0014] Figure 2 This is a schematic diagram of the installation structure of a ladder-type gantry crane;

[0015] Figure 3 This is a side view of the safety fixing device.

[0016] Figure 4 This is a schematic diagram of the left-side structure of the safety fixing device;

[0017] Figure 5 This is a top view of the safety fixing device. Detailed Implementation

[0018] The present invention will be further described below with reference to specific embodiments.

[0019] Example 1: As Figure 1-5 As shown, a stepped gantry crane includes a first gantry crane 1, a second gantry crane 2, and a swing trolley 3. The trolley traveling mechanisms 4 of both the first and second gantry cranes 1 and 2 are mounted on a single swing trolley 3. A detachable safety fixing device 8 is provided between the trolley traveling mechanism 4 and the swing trolley 3. The swing trolley 3 is placed on guide rail 5 in the beam-making area, and guide rail 6 on the swing trolley 3 is flush with guide rail 7 in the beam storage area. The two gantry cranes need to complete the transition from the beam-making area to the beam storage area while in operation, requiring a 3.5m horizontal drop transition (commonly known as: step-like movement). To ensure production safety, the lifting mechanism and trolley travel are not performed during the step transition phase. The detachable safety fixing device ensures the safe operation of the gantry cranes and the swing trolley.

[0020] Furthermore, the aforementioned safety fixing device 8 includes a metal shoe 801 and a chain 802. The top end of the metal shoe 801 is fixedly connected to one end of the chain 802, and the other end of the chain 802 is fixedly connected to the trolley frame of the swing trolley 3.

[0021] Furthermore, the aforementioned iron shoe 801 includes a base plate 803, a back plate 804, and an arc-shaped plate 805. Two back plates 804 are welded to the rear of the upper surface of the base plate 803. An inverted U-shaped part 806 is provided at the rear bottom of the base plate 803. The diameter of the arc surface of the arc plate 805 can fit with the traveling wheel of the trolley traveling mechanism of gantry crane 1 or gantry crane 2.

[0022] Furthermore, the aforementioned trolley traveling mechanism 4 consists of four units, located at the four corners of the gantry crane and on two tracks 5, to ensure the safe operation of the trolley in the beam fabrication area.

[0023] The control and switching between the gantry crane trolley travel and the shuttle trolley are controlled by the electrical control box. A switch is provided on the switch box of the electrical control box and the button switch of the remote control to realize the switching between the gantry crane trolley travel and the shuttle trolley.

[0024] Example 2: A method of using a ladder-type gantry crane, the method comprising:

[0025] (1) Operation process of gantry crane 1 and gantry crane 2 from beam fabrication area to beam storage area under working conditions: When the gantry crane is in the beam fabrication area, the gantry crane and the transfer trolley are fixed by a safety fixing device. When the gantry crane is used in the beam fabrication area, the gantry crane travels by the transfer trolley. The trolley traveling mechanism and the lifting mechanism of the gantry crane can operate normally. When the gantry crane needs to move to the beam storage area, the crane is first moved to the 3.5-meter high step to complete the docking of the second track on the transfer trolley with the third track on the 3.5-meter high step. Then, the transfer flat car near the step is safely fixed to the ground. The safety fixing device between the gantry crane and the transfer flat car is released. The power supply device of the transfer trolley and the gantry crane is switched. The gantry crane 1 then moves to the 3.5-meter high step. Because it is in working condition, Gantry crane 1 and gantry crane 2 lift a 40m long precast beam. In this state, the trolley traveling mechanism of gantry crane 1 is in operation, and the fixed shuttle trolley of gantry crane 2 is in operation. After gantry crane 1 has traveled a certain distance on the step, the shuttle trolley of gantry crane 2 connects with the shuttle trolley of gantry crane 1. After the shuttle trolley of gantry crane 2 is safely fixed to the ground, the safety fixing device between gantry crane 2 and the shuttle trolley is released. Then, gantry crane 2 travels to the 3.5-meter high step through the two shuttle trolleys. The operation of the two gantry cranes on the step is the trolley traveling mechanism of the gantry cranes, thus completing the 3.5-meter high step crossing. After completion, the two shuttle trolleys do not need to be moved, which can facilitate the subsequent cranes' transition from the beam storage area to the beam fabrication area below the 3.5-meter high section.

[0026] (2) Operation process of gantry crane 1 and gantry crane 2 from beam storage area to beam fabrication area under working conditions: When the gantry crane is used in the beam storage area, the gantry crane operates as the crane's trolley traveling mechanism. When it needs to move to the beam fabrication area, gantry crane 1 and gantry crane 2 have been secured using the method in step (1). Gantry crane 2 is moved to a transfer trolley away from the steps, and gantry crane 1 is moved to a transfer trolley close to the steps. Then, the gantry crane and the transfer trolley are secured using a safety fixing device. Then, the two transfer trolleys are released from the ground. Then, gantry crane 1 and gantry crane 2 run on track 1 in the beam fabrication area via the transfer trolley. That is, gantry crane 1 and gantry crane 2 complete the transition from the beam storage area to the beam fabrication area.

[0027] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of protection of the claims.

Claims

1. A method of using a ladder-type gantry crane, characterized in that: The ladder-type gantry crane includes gantry crane one (1), gantry crane two (2) and swing trolley (3). The trolley traveling mechanism (4) of gantry crane one (1) and gantry crane two (2) are both placed on a swing trolley (3). A detachable safety fixing device (8) is provided between the trolley traveling mechanism (4) and the swing trolley (3). The swing trolley (3) is placed on the guide rail one (5) in the beam making area. The guide rail two (6) on the swing trolley (3) is flush with the guide rail three (7) in the beam storage area. The method of use includes: (1) Operation process of gantry crane 1 and gantry crane 2 from beam fabrication area to beam storage area under working conditions: When the gantry crane is in the beam fabrication area, the gantry crane and the transfer trolley are fixed by a safety fixing device. When the gantry crane is used in the beam fabrication area, the gantry crane travels by the transfer trolley. The trolley traveling mechanism and the lifting mechanism of the gantry crane can operate normally. When the gantry crane needs to move to the beam storage area, the crane is first moved to the 3.5-meter high step to complete the docking of the second track on the transfer trolley with the third track on the 3.5-meter high step. Then, the transfer flat car near the step is safely fixed to the ground. The safety fixing device between the gantry crane and the transfer flat car is released. The power supply device of the transfer trolley and the gantry crane is switched. The gantry crane 1 then moves to the 3.5-meter high step. Because it is in working condition, Gantry crane 1 and gantry crane 2 lift a 40m long precast beam. In this state, the trolley traveling mechanism of gantry crane 1 is in operation, and the fixed shuttle trolley of gantry crane 2 is in operation. After gantry crane 1 has traveled a certain distance on the step, the shuttle trolley of gantry crane 2 connects with the shuttle trolley of gantry crane 1. After the shuttle trolley of gantry crane 2 is safely fixed to the ground, the safety fixing device between gantry crane 2 and the shuttle trolley is released. Then, gantry crane 2 travels to the 3.5-meter high step through the two shuttle trolleys. The operation of the two gantry cranes on the step is the trolley traveling mechanism of the gantry cranes, thus completing the 3.5-meter high step crossing. After completion, the two shuttle trolleys do not need to be moved, which can facilitate the subsequent cranes' transition from the beam storage area to the beam fabrication area below the 3.5-meter high section. (2) Operation process of gantry crane 1 and gantry crane 2 from beam storage area to beam fabrication area under working conditions: When the gantry crane is used in the beam storage area, the gantry crane operates in the crane's trolley traveling mechanism. When it needs to move to the beam fabrication area, gantry crane 2 is moved to a transfer trolley away from the steps, and gantry crane 1 is moved to a transfer trolley close to the steps. Then, the gantry crane and the transfer trolley are fixed with a safety fixing device. Then, the two transfer trolleys are released from the ground. Then, gantry crane 1 and gantry crane 2 run on track 1 in the beam fabrication area through the transfer trolley. That is, gantry crane 1 and gantry crane 2 complete the transition from beam storage area to beam fabrication area.

2. The method of using a ladder-type gantry crane according to claim 1, characterized in that: The safety fixing device (8) includes a shoe (801) and a chain (802). The top of the shoe (801) is fixedly connected to one end of the chain (802), and the other end of the chain (802) is fixedly connected to the trolley frame of the swing trolley (3).

3. The method of using a ladder-type gantry crane according to claim 2, characterized in that: The iron shoe (801) includes a base plate (803), a back plate (804) and an arc plate (805). The two back plates (804) are welded to the rear of the upper surface of the base plate (803). An inverted U-shaped part (806) is set at the rear bottom of the base plate (803). The diameter of the arc surface of the arc plate (805) can fit with the traveling wheel of the trolley traveling mechanism of the gantry crane one (1) or the gantry crane two (2).

4. The method of using a ladder-type gantry crane according to claim 1, characterized in that: Four traveling mechanisms (4) are used, located at the four corners of the gantry crane and on two tracks (5).

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