Safe in-position system for jacking cross beam of tower crane

Abstract

The invention discloses a safe in-position system for a jacking cross beam of a tower crane. The device mainly comprises a standard section, the standard section is sleeved with a sleeve frame, the sleeve frame is connected with one end of an oil cylinder through a pin shaft, the other end of the oil cylinder is connected with a jacking cross beam through a pin shaft, a position switch K1 is installed at the position, close to the oil cylinder, of the upper end of the sleeve frame, and jacking cross beam pedals are installed at the two ends of the jacking cross beam. A position switch K2 and a position switch K3 are installed above the jacking beam pedal, the standard section comprises a standard section stand column, a standard section pedal is installed on the side face of the standard section stand column, a hydraulic station is fixedly installed on the sleeve frame, a bypass electromagnetic valve is installed on the hydraulic station, and a pressure switch K0 is arranged in a large cavity of the oil cylinder and sinks into the oil cylinder. The travel switch on the jacking cross beam is used for automatically identifying whether the position of the jacking cross beam is a safe position or not; when the jacking cross beam is located at the safe position, the hydraulic pump station can drive the hydraulic oil cylinder to conduct jacking operation. Otherwise, the jacking operation is interrupted, so that the jacking danger is avoided.

Description

Technical Field

[0001] The invention relates to the field of tower body disassembly and assembly systems, in particular to the technical field of tower crane jacking beam safe positioning systems. Background Art

[0002] At present, during the tower crane lifting process, it is generally determined by manpower whether the lifting beam is safely in place, which poses a great safety hazard. Due to manual operation errors, the lifting and loading work is carried out when the lifting beam is not safely in place, causing the tower crane frame or the standard section to fail, which will cause a major safety accident in serious cases. Summary of the invention

[0003] In order to solve the above problems, that is, to solve the problems raised by the above background technology, the present invention proposes a tower crane jacking beam safe positioning system, including a section, the section is sleeved with a frame, the frame is connected to one end of the cylinder through a pin shaft, the other end of the cylinder is connected to the jacking beam through a pin shaft, a position switch K1 is installed at the upper end of the frame near the cylinder, jacking beam pedals are installed at both ends of the jacking beam, position switches K2 and position switch K3 are installed above the jacking beam pedals, respectively, the section includes a section column, the side of the section column is installed with a section pedal, a hydraulic station is fixedly installed on the frame, a bypass solenoid valve is installed on the hydraulic station, and the large chamber of the cylinder is provided with a pressure switch K0 and sunk into the interior of the cylinder.

[0004] The present invention is further configured as follows: the position switch K2 and the position switch K3 are directly opposite to the contact surface of the standard pedal.

[0005] The present invention is further configured as follows: the bypass solenoid valve, position switch K1, position switch K2, position switch K3 and pressure switch K0 are all automatically controlled after being logically programmed by the controller.

[0006] The present invention is further configured as follows: the position switch K1, the position switch K2 and the position switch K3 adopt a photoelectric structure and are all provided with protective covers.

[0007] The present invention has the following beneficial effects: the present invention mainly utilizes the travel switch on the jacking beam to automatically identify whether the position of the jacking beam is in a safe position; when the jacking beam is in a safe position, the hydraulic pump station can drive the hydraulic cylinder to perform jacking operations; otherwise, even if the hydraulic pump station handle is in a jacking action, the system will automatically control the hydraulic pump to be in an unloading state. At this time, the hydraulic pump station cannot drive the hydraulic cylinder to move, and the jacking operation is interrupted, thereby avoiding jacking dangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is an overall schematic diagram of the present invention;

[0009] Figure 2 It is a detailed schematic diagram of the position switches K2 and K3 of the present invention;

[0010] Figure 3 It is a schematic diagram of the oil cylinder state of the present invention;

[0011] Figure 4 It is the principle diagram of the hydraulic station of the present invention.

[0012] 1. Frame, 2. Cylinder, 3. Position switch K1, 4. Lifting beam, 5. Lifting beam pedal, 6. Marking section, 7. Hydraulic station, 8. Position switch K2, 9. Position switch K3, 10. Marking section column, 11. Marking section pedal, 12. Pressure switch K0. DETAILED DESCRIPTION

[0013] Please refer to the attached Figure 1-4 Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0014] The present invention proposes a tower crane jacking beam safe positioning system, comprising a section 6, on which a sleeve frame 1 is sleeved, the sleeve frame 1 is connected to one end of a cylinder 2 through a pin shaft, and the other end of the cylinder 2 is connected to a jacking beam 4 through a pin shaft. The characteristic is that a position switch K13 is installed at the upper end of the sleeve frame 1 near the cylinder 2, jacking beam pedals 5 are installed at both ends of the jacking beam 4, and position switches K28 and position switches K39 are installed above the jacking beam pedals 5, respectively. The section 6 comprises a section column 10, and a section pedal 11 is installed on the side of the section column 10. A hydraulic station 7 is fixedly installed on the sleeve frame 1, and a bypass solenoid valve is installed on the hydraulic station 7. The large chamber of the cylinder 2 is provided with a pressure switch K012 and is sunk into the interior of the cylinder 2 to effectively prevent damage from collision.

[0015] The position switch K28 and the position switch K39 are directly opposite to the contact surface of the marking section pedal 11, and can effectively detect whether the lifting beam pedal is completely in contact with the marking section pedal.

[0016] The bypass solenoid valve, position switch K13, position switch K28, position switch K39 and pressure switch K012 are all automatically controlled after being logically programmed by the controller, effectively avoiding the danger caused by the jacking beam not being fully in place under heavy load conditions.

[0017] The position switch K13, the position switch K28 and the position switch K39 adopt a photoelectric structure and are all provided with protective covers. They are sensitive and reliable in operation, are less disturbed by structural vibration, and prevent structural damage during transportation.

[0018] The control principle is as follows:

[0019] like Figure 4 As shown in the schematic diagram, under normal circumstances, the solenoid valve electromagnet K4 is in the energized state, and the hydraulic station can drive the cylinder to move.

[0020] like Figure 3 As shown, when the oil cylinder is vertical, that is, the oil cylinder is in position A, the distance between the oil cylinder barrel and the position switch K1 is d, and the position switch K1 outputs a signal. When the oil cylinder is in position B, the lifting beam 4 needs to be attached to the section column 10, and the distance between the oil cylinder barrel and the position switch is D. At this time, the position switch K1 does not output a signal. When the signal of the position switch K1 is interrupted, the oil cylinder is in position B, and the position switches K2 and K3 on the left and right sides of the lifting beam are close to the section pedal 11, and the position switches K2 and K3 are in the output signal state at the same time. At this time, it is considered that the lifting beam 4 is safely in place, and heavy load operations are allowed.

[0021] When the signal of position switch K1 is interrupted, the oil cylinder is in position B, and the position switches K2 and K3 on the left and right sides of the jacking beam are close to the marking pedal 11, and any one or all of the position switches K2 and K3 are in the signal interruption state, then the action state of pressure switch K0 is detected. If the pressure switch K0 is in the non-actuated state, the oil cylinder is allowed to act normally; if the pressure switch K0 is in the action state, it is considered a dangerous working condition. When in a dangerous working condition, the action signal of pressure switch K0 controls the bypass solenoid valve electromagnet K4 to lose power, and an alarm signal is issued at the same time, the oil pump is in the unloading state, and the action of the oil cylinder is interrupted. After the operator observes the alarm information, the fault can be checked as soon as possible.

[0022] The present invention achieves the purpose of judging whether the lifting beam pedal is effectively fitted with the section pedal by detecting the positions of the position switches K2 and K3. When the lifting beam pedal is not safely fitted with the section pedal, the heavy-load lifting operation is interrupted to avoid danger.

[0023] The specific implementation methods are as follows:

[0024] When the position switch K1 outputs a signal, the cylinder is in a vertical state. At this time, the cylinder is in an exhaust state or a light-load stepping condition. In this state, the cylinder can move arbitrarily.

[0025] When the position switch K1 is in the signal disconnection state, the oil cylinder approaches the side of the marking section column, trying to make the lifting beam pedal fit onto the marking section pedal.

[0026] Usually, the lifting beam is first placed against the standard section column by human power, and the lifting beam pedal is a short distance above the standard section pedal. At this time, the oil cylinder load is small, the oil cylinder large chamber pressure switch is not activated, and the oil cylinder can operate normally until the lifting beam pedal fits the standard section pedal.

[0027] The position switch K1 is in the signal disconnection state and the position switches K2 and K3 are in the signal output state at the same time. At this time, the cylinder is in the normal operation state.

[0028] The position switch K1 is in the signal disconnection state, any one or all of the position switches K2 and K3 are in the signal disconnection state, the cylinder large chamber pressure switch is in the non-actuated state, and the cylinder is in the normal action state.

[0029] The position switch K1 is in the signal disconnection state, and any one or all of the position switches K2 and K3 are in the signal disconnection state. At this time, the detection cylinder large chamber pressure switch is in the action state. When the cylinder large chamber pressure switch is actuated, it is considered a dangerous working condition; the pressure switch action signal controls the bypass solenoid valve solenoid K4 to lose power, the hydraulic pump is unloaded, the heavy load jacking is interrupted, and an alarm signal is issued at the same time.

[0030] Check the positions of position switches K2 and K3 and whether the lifting beam pedal is completely in contact with the marking section pedal. Only continue the heavy load operation after no abnormalities are found.

[0031] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0032] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0035] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A tower crane jacking beam safety positioning system, comprising a mast (6), a sleeve (1) is sleeved on the mast (6), the sleeve (1) is connected to one end of a cylinder (2) via a pin, and the other end of the cylinder (2) is connected to a jacking beam (4) via a pin, characterized in that: A position switch K1 (3) is installed at the upper end of the sleeve (1) near the oil cylinder (2), and lifting beam pedals (5) are installed at both ends of the lifting beam (4). Position switches K2 (8) and position switches K3 (9) are installed above the lifting beam pedals (5), respectively. The marking section (6) includes a marking section column (10), and a marking section pedal (11) is installed on the side of the marking section column (10). A hydraulic station (7) is fixedly installed on the sleeve (1), and a bypass solenoid valve is installed on the hydraulic station (7). The large chamber of the oil cylinder (2) is provided with a pressure switch K0 (12) and is sunk into the interior of the oil cylinder (2).

2. A tower crane jacking beam safety positioning system as claimed in claim 1, characterized in that: The position switch K2 (8) and the position switch K3 (9) are directly opposite to the contact surface of the standard pedal (11).

3. A tower crane jacking beam safety positioning system as claimed in claim 1, characterized in that: The bypass solenoid valve, position switch K1 (3), position switch K2 (8), position switch K3 (9) and pressure switch K0 (12) are all automatically controlled after being logically programmed by the controller.

4. A tower crane jacking beam safety positioning system as claimed in claim 1, characterized in that: The position switch K1 (3), the position switch K2 (8) and the position switch K3 (9) adopt a photoelectric structure and are all provided with protective covers.

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