Cross gantry crane anti-collision system and transportation system

Abstract

The utility model relates to a hoisting equipment technical field, concretely relates to a kind of cross gantry crane anti-collision system and transport system, wherein the cross gantry crane anti-collision system includes crash ruler, at least two crash rulers are respectively set in two lines of intersection, and crash ruler is along the length direction of corresponding line through the intersection of two lines;Travel switch, at least two travel switches are respectively connected with the gantry crane of two lines, and the free end of the trigger of travel switch is set towards crash ruler, and the travel of gantry crane along line can drive trigger and contact or separate from crash ruler;Control module, the travel switch on two gantry cranes is all connected with control module communication, and control module can judge the position of two gantry cranes according to the output signal of travel switch.The utility model can overcome the deficiency that the existing cross gantry crane transport system relies on manual coordination the movement of two gantry cranes, and it is easy to cause the collision of gantry crane in intersection area due to operation fault or improper communication.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a cross gantry crane anti-collision system and transportation system. Background Technology

[0002] A gantry crane is a lifting device that can move in a straight line along a track. In order to improve the utilization rate of gantry cranes, existing factory areas are often constructed with various workshops distributed along a straight line at intervals, and then gantry cranes are used to connect the various workshops in series. For example, in a beam fabrication yard, the beam fabrication area and the steel reinforcement room are usually set up on a straight line, and then a gantry crane is used to connect the beam fabrication area and the steel reinforcement room to transport materials between the beam fabrication area and the steel reinforcement room.

[0003] However, due to space constraints, the various workshops within the factory area can sometimes only be set up along a broken line, while conventional wheel-rail gantry cranes can only move in a straight line. Therefore, a cross gantry crane transportation system is required. A cross gantry crane transportation system includes two gantry cranes, and the routes of the two gantry cranes intersect at a point. By having the two gantry cranes alternately enter the intersection area, relay transportation of materials can be achieved. However, this method places high demands on the operating skills and coordination of the operators of the two gantry cranes. Once an operational error or miscommunication occurs, it is very easy to cause a collision accident between the gantry cranes. Therefore, it is urgent to develop a system that can automatically prevent the two gantry cranes from colliding in the intersection area. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing cross-gantry crane transportation systems that rely on manual coordination of the movement of two gantry cranes, which can easily lead to collisions between the gantry cranes in the intersection area due to operational errors or poor communication. This invention provides a cross-gantry crane anti-collision system and transportation system.

[0005] In a first aspect, this utility model provides a cross-gantry crane anti-collision system, comprising: At least two striking rods are respectively set at the two intersecting lines. The striking rods are located on the side of the track of the corresponding line along the width direction of the corresponding line, and the striking rods pass through the intersection of the two lines along the length direction of the corresponding line. Limit switches, at least two limit switches are connected to the gantry cranes of two lines respectively. The free end of the trigger of the limit switch is set towards the impact gauge. When the gantry crane moves along the line, it can drive the trigger to contact or separate from the impact gauge, thereby changing the output signal of the limit switch. The control module is connected to the limit switches on both gantry cranes. The control module can determine the position of the two gantry cranes based on the output signals of the limit switches. When one of the gantry cranes is already in the intersection area, the control module can issue a stop command to the other gantry crane that is about to enter the intersection area.

[0006] Preferably, each gantry crane is connected to at least two limit switches, which are spaced apart along the length of the corresponding line.

[0007] Preferably, the distance between the limit switches at both ends of the gantry crane is L1, the length of the striker is L2, the travel distance of the gantry crane from the intersection point to the end of the corresponding line is L3, and L1+L2≥L3.

[0008] Preferably, the control module includes a host computer and a slave computer. The host computer is installed on one of the gantry cranes and is used to determine the positions of the two gantry cranes, issue a stop command, and stop the corresponding gantry crane. The slave computer is installed on the other gantry crane and can receive the stop command from the host computer and stop the corresponding gantry crane.

[0009] Preferably, at least one end of the impact gauge along the corresponding line length direction is provided with a ramp section, and the height of the ramp section gradually decreases in the direction away from the center of the impact gauge.

[0010] Preferably, the trigger is connected to the limit switch through a slotted hole.

[0011] Preferably, a roller is connected to the free end of the trigger.

[0012] In a second aspect, this utility model provides a cross gantry crane transportation system, including two intersecting lines, each line having a gantry crane installed on it, and also includes a cross gantry crane anti-collision system of this utility model.

[0013] Preferably, the tracks of both lines are broken at the intersection, and a guide block is connected to the side of the track near the intersection. The width of the guide block increases as it gets closer to the intersection, and the maximum width of the guide block is less than the wheel flange spacing of the gantry crane's traveling wheels.

[0014] Preferably, a stabilizer is connected between the ends of the two tracks near the intersection, and the top surface of the stabilizer is lower than the bottom of the rim of the gantry crane's traveling wheel.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a collision prevention system for cross gantry cranes. By installing a collision gauge on the side of the track and a limit switch on the gantry crane, the control module can monitor the position of the two gantry cranes. When one gantry crane has entered the cross area, the control module can prevent the other gantry crane from entering the cross area as well, thereby avoiding the two gantry cranes from moving in the cross area at the same time and thus avoiding gantry crane collision accidents.

[0016] 2. This utility model provides a cross gantry crane transportation system that can connect factory buildings that are not located on the same straight line, while automatically preventing gantry cranes on two lines from colliding. Attached Figure Description

[0017] Figure 1 This is a partial planar layout diagram of a cross-gantry crane anti-collision system according to the present invention; Figure 2 This is a three-dimensional structural diagram of the limit switch of a cross gantry crane anti-collision system according to this utility model; Figure 3 This is a schematic diagram of the working principle of the limit switch of the cross gantry crane anti-collision system according to this utility model; Figure 4 This is a partial three-dimensional structural diagram of the track of a cross-gantry crane anti-collision system of this utility model at the intersection point; icon: 1-Strike ruler; 11-Slope section; 2-Limit switch; 21-Trigger element; 22-Oval hole; 23-Roller; 3-Rail; 31-Intersection; 32-Guide block; 33-Stabilizer; 4-Gantry crane; 5-Factory building. Detailed Implementation

[0018] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the above-mentioned subject matter of the present invention to the following embodiments. All technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0019] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0021] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0022] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0023] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0024] Example 1 like Figures 1 to 4 As shown, a cross gantry crane anti-collision system includes a collision ruler 1, a limit switch 2, and a control module.

[0025] At least two impact rulers 1 are respectively set at the two intersecting lines. The impact rulers 1 are located on the side of the track 3 of the corresponding line along the width direction of the corresponding line, and the impact rulers 1 pass through the intersection point 31 of the two lines along the length direction of the corresponding line.

[0026] At least two limit switches 2 are connected to the two lines of the gantry crane 4 respectively, for example, connected to the lower flange of the outrigger or the lower crossbeam of the gantry crane 4; the free end of the trigger 21 of the limit switch 2 is set towards the impact ruler 1, and the movement of the gantry crane 4 along the line can drive the trigger 21 to contact or separate from the impact ruler 1, thereby changing the output signal of the limit switch 2.

[0027] The limit switches 2 on both gantry cranes 4 are connected to the control module. The control module can determine the position of the two gantry cranes 4 based on the output signal of the limit switches 2, such as whether the gantry crane 4 is currently located in the area where the corresponding impact ruler 1 is located. When one of the gantry cranes 4 is already in the intersection area and the other gantry crane 4 is also about to enter the intersection area, the control module can issue a stop command to the latter gantry crane 4.

[0028] In this embodiment, by installing a striking rod 1 on the side of the track 3 and a limit switch 2 on the gantry crane 4, when the gantry crane 4 passes the intersection 31 and enters the intersection area, the trigger 21 of the limit switch 2 will contact the striking rod 1, thereby changing the signal of the limit switch 2; therefore, the two striking rods 1 can respectively form near the intersection 31 of the corresponding lines, such as Figure 1 The warning area indicated by the dashed box is where the control module can detect signal changes as soon as the limit switch 2 on the gantry crane 4 enters the warning area. When the control module detects a signal from the limit switch 2 in one of the warning areas, it indicates that the gantry crane 4 on the corresponding line is crossing the intersection 31 and entering the intersection area. If a signal from the limit switch 2 is then detected in another warning area, it indicates that another gantry crane 4 is also crossing the intersection 31 and entering the intersection area. At this time, the control module sends a stop signal to the gantry crane 4 that has entered the warning area later, thus preventing both gantry cranes 4 from operating in the intersection area at the same time and avoiding a collision accident.

[0029] In an optional embodiment, each gantry crane 4 is connected to at least two limit switches 2, which are spaced apart along the length of the corresponding line.

[0030] This implementation method, on the one hand, facilitates a more accurate determination of the specific position of the gantry crane 4 by comparing the signals of each limit switch 2, for example... Figure 3 As shown, when the left limit switch 2 of the gantry crane 4 is in contact with the impact gauge 1, while the right limit switch 2 is not yet in contact with the impact gauge 1, the triggers 21 of the two limit switches 2 are in different positions, thus outputting different signals. Based on this, it can be determined that the left end of the gantry crane 4 has entered the warning area, while the right end has not yet entered the warning area. On the other hand, it can also add redundancy to the system and avoid the situation where the control module is completely unable to determine the position of the gantry crane 4 due to the failure of a single limit switch 2.

[0031] In an optional implementation, the impact gauge 1 extends a distance along the length of the corresponding line to both sides of the intersection 31, thereby expanding the warning area along the length of the line. This allows the control module to detect the signal of the limit switch 2 before the gantry crane 4 passes through the intersection 31, thus enabling the other gantry crane 4 to be stopped as early as possible when one gantry crane 4 is already in the intersection area and the other gantry crane 4 attempts to enter the intersection area. This keeps the latter further away from the intersection area and further reduces the risk of collision between the two gantry cranes 4.

[0032] In an optional embodiment, the distance between the limit switches 2 at the two ends of the gantry crane 4 is L1, the length of the impact gauge 1 is L2, and the travel distance of the gantry crane 4 from the intersection 31 to the end of the corresponding line (the end away from the corresponding factory building 5) is L3, where L1+L2≥L3. Thus, even if the gantry crane 4 moves to the end of the corresponding line, at least one limit switch 2 can remain in contact with the impact gauge 1. This allows the embodiment to maintain the monitoring of the position of the gantry crane 4 throughout the entire distance from the intersection 31 to the end of the line, avoiding the situation where the limit switch 2 separates from the impact gauge 1 due to the gantry crane 4 moving too far to the end of the line, which would cause the control module to mistakenly believe that the gantry crane 4 has left the intersection area.

[0033] In an optional implementation, the control module may be an existing product, including but not limited to a microcontroller, a programmable logic controller, or an industrial control computer.

[0034] In an optional implementation, the control module includes a host computer and a slave computer. The host computer is installed on one of the gantry cranes 4 and is used to determine the positions of the two gantry cranes 4, issue a stop command, and stop the gantry crane 4 it is located on. The slave computer is installed on the other gantry crane 4 and can receive the stop command from the host computer and stop the gantry crane 4 it is located on.

[0035] This implementation divides the control module into a host computer and a slave computer. The host computer is responsible for decision-making, and the slave computer is responsible for execution. The host computer and the slave computer each perform their respective duties, which can improve the system operating efficiency and ensure the coordination of the operation of the two gantry cranes 4, avoiding the situation where the commands of the two gantry cranes 4 conflict with each other.

[0036] In optional implementations, the specific methods of communication connection include, but are not limited to, fiber optic connection, Bluetooth connection, cellular communication and wireless local area network connection; for example, each limit switch 2 on each gantry crane 4 can be connected to the corresponding control module through a shielded cable; the control modules on two gantry cranes 4 can be wirelessly connected.

[0037] In optional embodiments, the specific structural form of the striking ruler 1 includes, but is not limited to, steel, concrete block or wooden block, as long as its upper surface has sufficient height to contact the trigger 21 and cause a change in the output signal of the limit switch 2.

[0038] In optional implementations, such as Figure 3 As shown, at least one end of the impact ruler 1 along the corresponding line length direction is provided with a ramp section 11. The height of the ramp section 11 gradually decreases in the direction away from the center of the impact ruler 1, so that the pressure between the impact ruler 1 and the trigger 21 can transition more smoothly from zero to peak value, avoiding the situation where the impact ruler 1 and the trigger 21 are damaged due to instantaneous rigid impact.

[0039] In optional embodiments, the limit switch 2 can be an existing product, including but not limited to a straight rod limit switch 2, a spring rod limit switch 2, and a lever-type limit switch 2; for example... Figure 2 and Figure 3 The diagram shows a lever-type limit switch 2, whose trigger 21 is oscillatingly connected to the body of the limit switch 2. When the trigger 21 is not in contact with the striker 1, the trigger 21 hangs down naturally or hangs down under the action of the spring; when the trigger 21 is in contact with the striker 1, the trigger 21 is pushed upward by the striker 1, thereby causing it to swing relative to the body of the limit switch 2, which in turn causes the output of the limit switch 2 to change.

[0040] In optional implementations, such as Figure 2 As shown, the trigger 21 is connected to the limit switch 2 through the waist-shaped hole 22, so that the trigger 21 can adjust its installation position along the length direction of the waist-shaped hole 22 to adapt to the impact ruler 1 at different heights and to compensate for possible settlement in the later stage.

[0041] In optional implementations, such as Figure 2 As shown, the free end of the trigger 21 is connected to a roller 23 to convert the sliding friction between the trigger 21 and the impact ruler 1 into rolling friction, thereby reducing the wear between the trigger 21 and the impact ruler 1. This can improve the service life of this embodiment and avoid the wear between the trigger 21 and the impact ruler 1 from affecting the output of the limit switch 2, thus preventing the control module from accurately determining the position of the gantry crane 4.

[0042] Example 2 like Figures 1 to 4 As shown, a cross gantry crane transportation system includes two intersecting lines, each leading to a different factory building 5; gantry cranes 4 are installed on each of the two lines; and a cross gantry crane anti-collision system as described in Example 1 is also included.

[0043] The cross gantry crane transportation system of this embodiment includes two intersecting lines, which can connect factory buildings 5 ​​that are not located on the same straight line to each other, for example... Figure 1 As shown, two cross-shaped lines connect the two factory buildings 5 ​​arranged in a T-shape; and since this embodiment uses the cross gantry crane anti-collision system in embodiment 1, it can automatically avoid accidents caused by two gantry cranes 4 colliding while operating in the cross area at the same time.

[0044] In an optional embodiment, the tracks 3 of both lines are broken at the intersection 31. A guide block 32 is connected to the side of the end of the track 3 near the intersection 31. The width of the guide block 32 (the dimension along the width direction of the corresponding line) is larger as it gets closer to the intersection 31. The maximum width of the guide block 32 is less than the wheel flange spacing of the traveling wheels of the gantry crane 4.

[0045] For conventional gantry crane traveling wheels, the distance between the rims on both sides of the traveling wheels is greater than the width of the track 3. Therefore, the traveling wheels often deviate to the left or right relative to the central axis of the track 3 along the width direction. This can cause the rims of the traveling wheels to collide with the track 3 of another line when the traveling wheels pass through the intersection 31. Therefore, in this embodiment, a guide block 32 is added to the end of the track 3 near the intersection 31. As the traveling wheels gradually approach the intersection 31, the width of the guide block 32 gradually increases, which gradually reduces the gap between the rims of the traveling wheels and the side of the guide block 32. This gradually eliminates the left and right deviations of the traveling wheels relative to the central axis of the track 3, ensuring that the traveling wheels can pass through the intersection 31 smoothly and avoiding collisions between the traveling wheels and the track 3 of another line at the intersection 31.

[0046] In an optional embodiment, guide blocks 32 are welded to both sides of the track 3 along its width direction.

[0047] In an optional embodiment, a stabilizer 33 is connected between the ends of the two tracks 3 near the intersection 31, thereby locking the relative position of the ends of the two adjacent tracks 3 and preventing the traveling wheels from being unable to pass the intersection 31 smoothly due to the relative position of the ends of the two adjacent tracks 3 being offset; the height of the top surface of the stabilizer 33 is lower than the bottom of the wheel flange of the traveling wheel of the gantry crane 4, thereby preventing the stabilizer 33 from interfering with the wheel flange of the traveling wheel.

[0048] In an optional embodiment, both ends of the stabilizer 33 are welded to the corresponding track 3.

[0049] The above content is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A collision avoidance system for cross gantry cranes, characterized in that, include: At least two of the striking rulers (1) are respectively set at the intersection of two lines. The striking rulers (1) are located on the side of the track (3) of the corresponding line along the width direction of the corresponding line. The striking rulers (1) pass through the intersection (31) of the two lines along the length direction of the corresponding line. Limit switches (2), at least two of the limit switches (2) are respectively connected to the gantry cranes (4) of the two lines. The free end of the trigger (21) of the limit switch (2) is set towards the impact ruler (1). When the gantry crane (4) moves along the line, it can drive the trigger (21) to contact or separate from the impact ruler (1), thereby changing the output signal of the limit switch (2). The control module is connected to the limit switches (2) on both gantry cranes (4). The control module can determine the position of the two gantry cranes (4) based on the output signal of the limit switches (2). When one of the gantry cranes (4) is in the intersection area, the control module can issue a stop command to the other gantry crane (4) that is about to enter the intersection area.

2. The anti-collision system for a cross gantry crane according to claim 1, characterized in that, Each gantry crane (4) is connected to at least two of the aforementioned limit switches (2), which are spaced apart along the length of the corresponding line.

3. The anti-collision system for a cross gantry crane according to claim 2, characterized in that, The distance between the limit switches (2) at the two ends of the gantry crane (4) is L1, the length of the ram (1) is L2, the travel distance of the gantry crane (4) from the intersection (31) to the end of the corresponding line is L3, and L1+L2≥L3.

4. A cross-gantry crane anti-collision system according to any one of claims 1 to 3, characterized in that, The control module includes a host computer and a slave computer. The host computer is installed on one of the gantry cranes (4) and is used to determine the positions of the two gantry cranes (4), issue a stop command, and stop the corresponding gantry crane (4). The slave computer is installed on the other gantry crane (4) and can receive the stop command from the host computer and stop the corresponding gantry crane (4).

5. A cross-gantry crane anti-collision system according to any one of claims 1 to 3, characterized in that, The impact gauge (1) has a ramp section (11) at at least one end along the corresponding line length direction, and the height of the ramp section (11) gradually decreases in the direction away from the center of the impact gauge (1).

6. A cross-gantry crane anti-collision system according to any one of claims 1 to 3, characterized in that, The trigger (21) is connected to the limit switch (2) through the waist-shaped hole (22).

7. A cross-gantry crane anti-collision system according to any one of claims 1 to 3, characterized in that, The free end of the trigger (21) is connected to a roller (23).

8. A cross-gantry crane transportation system, comprising two intersecting lines, each line equipped with a gantry crane (4), characterized in that, It also includes a cross-gantry crane anti-collision system as described in any one of claims 1 to 7.

9. A cross gantry crane transportation system according to claim 8, characterized in that, The tracks (3) of the two lines are broken at the intersection (31). The end side of the track (3) near the intersection (31) is connected to a guide block (32). The width of the guide block (32) is larger as it is closer to the intersection (31). The maximum width of the guide block (32) is less than the wheel flange spacing of the traveling wheel of the gantry crane (4).

10. A cross gantry crane transportation system according to claim 9, characterized in that, A stabilizer (33) is connected between the ends of the two tracks (3) near the intersection (31), and the top surface of the stabilizer (33) is lower than the bottom of the wheel rim of the traveling wheel of the gantry crane (4).

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