Portal crane with protective structure

Abstract

The utility model relates to a portal crane with a protective structure, which comprises a main beam and two bases fixedly arranged at the bottom of the main beam, a hoisting structure is arranged at the bottom of the main beam, the hoisting structure comprises a movable frame arranged at the bottom of the main beam, and an electric capstan is arranged in the movable frame. According to the portal crane with the protection structure, an electric capstan in a movable frame runs to wind or unwind a steel cable, when the steel cable inclines, a disc is driven to deviate and extrude an arc plate on the outer side, so that an advancing and retreating rod is pushed to move outwards, the position of a pressure sensor is limited by a 7-shaped frame, and the advancing and retreating rod extrudes the sensor when moving; the sensor transmits a signal to the outside for early warning after receiving the pressure, after the position of the steel cable is straightened, the disc is reset, the reset spring pushes the arc plate and the advancing and retreating rod to reset, then the protection early warning task of inclined pulling and inclined hoisting continues to be executed, real-time monitoring and early warning of the state of the steel cable are achieved in the whole process, and operation safety of the crane is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to gantry crane technical field, concretely is a kind of gantry crane with protective structure. BACKGROUND

[0002] As an important hoisting structure, gantry crane is widely used in large equipment hoisting, bridge and building beam hoisting and other occasions, and is also suitable for narrow construction site space, engineering construction site with longitudinal depth limit, however, in the process of crane operation, skewing as a big security risk, seriously threatens the personal safety of operator and the service life of equipment, skewing not only can cause equipment damage, but also can cause serious accident, cause personnel casualties and property loss.

[0003] In order to deal with the hidden trouble caused by skewing, some monitoring systems for crane operation safety appear in the market, these systems usually adopt high-precision sensor and intelligent algorithm, real-time monitoring of each operation parameter of crane, such as boom angle, load weight and operation posture, however, these systems mostly focus on the overall running state of crane, lack specific monitoring and early warning mechanism for steel cable skewing problem, therefore, a kind of gantry crane with protective structure is proposed to solve the above problems. UTILITY MODEL CONTENT

[0004] In view of the deficiency of prior art, the utility model provides a kind of gantry crane with protective structure to overcome the deficiency in the prior art.

[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows:

[0006] A kind of gantry crane with protective structure, including main girder, two base frames fixedly installed in the bottom of main girder, the bottom of the main girder is provided with hoisting structure, the hoisting structure includes the mobile frame arranged in the bottom of main girder, the inside of the mobile frame is provided with electric capstan, the outside of the electric capstan is fixedly installed with the steel cable that penetrates to the bottom of mobile frame, the bottom of the hoisting structure is provided with skewing protection early warning structure;

[0007] The skewing and tilting prevention and early warning structure comprises four inclined arms fixedly installed at the bottom of the moving frame, a sleeve ring sleeved on the outside of the steel cable is fixedly installed at the bottom of the four inclined arms, a vertical arm is fixedly installed at the outer side of each of the four inclined arms, a retractable rod is slidingly installed at the lower end of each of the four vertical arms, a circular arc plate is fixedly installed at one end of each of the four retractable rods, a reset spring is sleeved on the outside of each of the four retractable rods, one end of each of the reset springs is in abutment with the corresponding vertical arm, and the other end of each of the reset springs is in abutment with the corresponding circular arc plate.

[0008] The electric winch in the moving frame can wind or unwind the steel cable, when the steel cable is skewed, the disc is offset and presses the circular arc plate on the outside, so that the retractable rod is pushed to move outward, the position of the pressure sensor is limited by the 7-shaped frame, the retractable rod presses the sensor when moving, the sensor transmits a signal to the outside after receiving the pressure, and the position of the steel cable is adjusted, the disc is reset, the reset spring pushes the circular arc plate and the retractable rod to reset, and then the protection and early warning task of the skewing and tilting prevention is continued, and the real-time monitoring and early warning of the state of the steel cable are realized, and the operation safety of the crane is effectively ensured.

[0009] On the basis of the above technical scheme, the utility model still can make improvement as follows.

[0010] Further, the bottom of the steel cable is fixedly installed with a lifting hook, the bottom of the lifting hook is fixedly installed with a buzzer, the inside of the moving frame is fixedly installed with a PLC controller electrically connected with the buzzer, and the PLC controller and the four pressure sensors are electrically connected.

[0011] Further, the top of the lifting hook is fixedly installed with an infrared pen penetrating through the bottom thereof.

[0012] Further, the bottom of the moving frame is provided with a rectangular groove, and the steel cable is movably arranged in the inside of the rectangular groove.

[0013] Further, the infrared pen is close to the midpoint of the lifting hook. ACCURATE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the portal crane with the protection structure;

[0015] Figure 2 It is Figure 1 It is an enlarged structure schematic view of the position A in the middle;

[0016] Figure 3Schematic diagram of the lifting structure and the anti-skewing and early warning structure for tilted and inclined lifting;

[0017] Figure 4 This is a schematic diagram of the explosion protection and early warning structure for the lifting structure and the inclined lifting structure.

[0018] The attached diagram lists the components represented by each number as follows:

[0019] 2. Moving frame; 3. Electric winch; 4. Steel cable; 5. Inclined arm; 6. Collar; 7. Vertical arm; 8. Advance / retreat lever; 9. Arc plate; 10. Return spring; 11. Disc; 12. 7-shaped frame; 13. Pressure sensor; 14. Hook; 15. Buzzer; 16. PLC controller; 17. Infrared pen; 18. Rectangular groove. Detailed Implementation

[0020] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0021] Example 1, such as Figures 1 to 4 As shown, a gantry crane with a protective structure includes a main beam and two bases fixedly installed at the bottom of the main beam. A lifting structure is provided at the bottom of the main beam. The lifting structure includes a movable frame 2 located at the bottom of the main beam. An electric winch 3 is installed inside the movable frame 2. A steel cable 4 is fixedly installed on the outside of the electric winch 3, extending through to the bottom of the movable frame 2. A tilting and oblique lifting protection and early warning structure is provided at the bottom of the lifting structure.

[0022] The anti-skewing and anti-tilting structure includes four inclined arms 5 fixedly installed at the bottom of the movable frame 2. A collar 6, fitted onto the outside of the steel cable 4, is fixedly installed at the bottom of each of the four inclined arms 5. Vertical arms 7 are fixedly installed on the outer sides of each of the four inclined arms 5. Advancing / retracting rods 8 are slidably installed at the lower ends of each of the four vertical arms 7. A circular arc plate 9 is fixedly installed at one end of each of the four advancing / retracting rods 8. A return spring 10 is fitted onto the outside of each of the four advancing / retracting rods 8. One end of each return spring 10 abuts against the corresponding vertical arm 7, and the other end abuts against the corresponding circular arc plate 9. A disc 11 is fixedly installed on the outside of the steel cable 4, located inside the four circular arc plates 9. A 7-shaped frame 12 is fixedly installed on the outer sides of the lower ends of each of the four vertical arms 7. Pressure sensors 13 are fixedly installed on each of the four 7-shaped frames 12, and each of the four pressure sensors 13 corresponds to one of the four advancing / retracting rods 8.

[0023] When in use, the electric winch 3 inside the moving frame 2 can be operated to wind and unwind the steel cable 4, when the position of the steel cable 4 is skewed, the disc 11 will be offset, the offset of the disc 11 will extrude the arc plate 9 outside the disc 11, when the arc plate 9 is extruded, the arc plate 9 will push the advancing and retreating rod 8 to move outward, since the 7-shaped frame 12 limits the pressure sensor 13 outside the advancing and retreating rod 8, when the advancing and retreating rod 8 moves outward, the pressure sensor 13 installed on the 7-shaped frame 12 will be extruded, when the pressure sensor 13 is extruded, the pressure sensor 13 will transmit a signal to the outside to give a warning prompt, when the position of the steel cable 4 is righted, the disc 11 will be reset, at this time, the inside of the reset spring 10 will be free of pressure and can be unfolded, thereby pushing the arc plate 9 and the advancing and retreating rod 8 to reset, after the arc plate 9 and the advancing and retreating rod 8 are reset, the subsequent skewing and tilting prevention and warning task can be continued.

[0024] As shown in Figures 2 to 4 The embodiment is a further improvement based on the embodiment 1, and specifically as follows:

[0025] The bottom of the steel cable 4 is fixedly installed with a hook 14, the bottom of the hook 14 is fixedly installed with a buzzer 15, the inside of the moving frame 2 is fixedly installed with a PLC controller 16 electrically connected with the buzzer 15, and the PLC controller 16 is electrically connected with the four pressure sensors 13.

[0026] In this way, the hook 14 installed at the bottom of the steel cable 4 is used to hang goods, when the pressure sensor 13 is extruded, the pressure sensor 13 will transmit a signal to the PLC controller 16, the PLC controller 16 receives the signal to control the buzzer 15 at the bottom of the hook 14 to start, the buzzer 15 starts to emit a buzzing sound to alert the personnel hanging the goods.

[0027] It should be noted that the electrical connection in the embodiment includes power connection and control signal connection, and is adapted to 5V, 3.3V or other voltages, and a suitable power supply is selected according to the specifications of the pressure sensor 13, the PLC controller 16 and the buzzer 15; the control signal connection connects the output pins of the PLC controller 16 such as PWM signals, direction control signals and step signals to the input end of the buzzer 15 driving module.

[0028] As shown in Figures 2 to 4 The embodiment is a further improvement based on the embodiment 2, and specifically as follows:

[0029] The top of the hook 14 is fixedly installed with an infrared pen 17 penetrating through the bottom of the hook 14.

[0030] In this way, when hoisting, the switch of the infrared pen 17 is pressed in advance to make the infrared pen 17 light up, when the steel cable 4 is perpendicular to the ground, the infrared line emitted by the infrared pen 17 will be irradiated on the ground, achieving the effect of vertical positioning.

[0031] Embodiment 4, as shown in Figure 3 This embodiment is a further improvement based on Embodiment 1, which is specifically as follows:

[0032] The bottom of the moving frame 2 is provided with a rectangular slot 18, and the steel cable 4 is movably arranged in the interior of the rectangular slot 18.

[0033] In this way, the steel cable 4 is movably arranged in the interior of the lower wall of the moving frame 2 through the rectangular slot 18.

[0034] Embodiment 5, as shown in Figure 2 This embodiment is a further improvement based on Embodiment 1, which is specifically as follows:

[0035] The infrared pen 17 is arranged close to the midpoint of the hook 14.

[0036] In this way, the infrared pen 17 emits more accurate infrared positioning.

[0037] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as the limitation of the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A portal crane with a protective structure, comprising a main beam, two pedestals fixedly installed at the bottom of the main beam, characterized in that: The bottom of the main beam is provided with a lifting structure, the lifting structure comprises a moving frame (2) arranged at the bottom of the main beam, the inside of the moving frame (2) is provided with an electric winch (3), the outside of the electric winch (3) is fixedly installed with a steel cable (4) penetrating to the bottom of the moving frame (2), and the bottom of the lifting structure is provided with a skew lifting protection early warning structure. The skew lifting protection early warning structure comprises four inclined arms (5) fixedly installed at the bottom of the moving frame (2), the bottom of each of the four inclined arms (5) is fixedly installed with a thimble (6) sleeved on the outside of the steel cable (4), the outer side of each of the four inclined arms (5) is fixedly installed with a vertical arm (7), the lower end of each of the four vertical arms (7) is slidingly installed with a retractable rod (8), one end of each of the four retractable rods (8) is fixedly installed with a circular arc plate (9), the outside of each of the four retractable rods (8) is sleeved with a reset spring (10), one end of each of the reset springs (10) is in abutment with the corresponding vertical arm (7), and the other end is in abutment with the corresponding circular arc plate (9). The outside of the steel cable (4) is fixedly installed with a disc (11) located on the inner side of the four circular arc plates (9), the lower end of the outer side of each of the four vertical arms (7) is fixedly installed with a 7-shaped frame (12), the four 7-shaped frames (12) are all fixedly installed with pressure sensors (13), and the four pressure sensors (13) correspond to the four retractable rods (8) in a one-to-one manner.

2. A portal crane with a protective structure according to claim 1, characterized in that: The bottom of the steel cable (4) is fixedly installed with a lifting hook (14), the bottom of the lifting hook (14) is fixedly installed with a buzzer (15), the inside of the moving frame (2) is fixedly installed with a PLC controller (16) electrically connected with the buzzer (15), and the PLC controller (16) is electrically connected with the four pressure sensors (13).

3. A portal crane with a protective structure according to claim 2, characterized in that: The top of the lifting hook (14) is fixedly installed with an infrared pen (17) penetrating to the bottom of the lifting hook (14).

4. A portal crane with a protective structure according to claim 1, characterized in that: The bottom of the moving frame (2) is provided with a rectangular groove (18), and the steel cable (4) is movably arranged in the rectangular groove (18).

5. A portal crane with a protective structure according to claim 3, characterized in that: The infrared pen (17) is close to the midpoint of the lifting hook (14).

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