CN220201241U - Tower crane hydraulic jacking safety control system - Google Patents
Tower crane hydraulic jacking safety control system Download PDFInfo
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- CN220201241U CN220201241U CN202321392460.4U CN202321392460U CN220201241U CN 220201241 U CN220201241 U CN 220201241U CN 202321392460 U CN202321392460 U CN 202321392460U CN 220201241 U CN220201241 U CN 220201241U
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- jacking
- valve
- tower crane
- limit switch
- hydraulic
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- 230000002159 abnormal effect Effects 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 230000005856 abnormality Effects 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 25
- 239000010720 hydraulic oil Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000009194 climbing Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
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- Control And Safety Of Cranes (AREA)
Abstract
The utility model discloses a hydraulic lifting safety control system of a tower crane, which comprises a hydraulic system, a PLC (programmable logic controller), a limit switch I, a limit switch II and an inclination sensor, wherein the hydraulic system comprises a hydraulic pump, an electromagnetic valve, a multi-way valve and a balance valve, an oil outlet of the hydraulic pump is connected with the right position of the electromagnetic valve, the electromagnetic valve is connected with an oil path of the multi-way valve, one way of the multi-way valve is connected with a rod valve of a lifting cylinder, and the other way of the multi-way valve is connected with a rodless cavity of the lifting cylinder through the balance valve. The limit switch I is used for detecting whether the stop shoe moves in place on the step of the standard joint, the limit switch II is used for detecting whether the hanging shoe moves in place on the step of the standard joint, and the inclination sensor is used for detecting whether the tower body of the tower crane is inclined. The PLC is electrically connected with the electromagnetic valve, and the electromagnetic valve is controlled to change direction after the abnormal signal of the sensor is received, so that the jacking oil cylinder stops working. The system can detect and control the jacking key parts of the tower crane, and effectively improves the safety and efficiency of jacking operation.
Description
Technical Field
The utility model relates to the technical field of tower cranes, in particular to a hydraulic lifting safety control system of a tower crane.
Background
The hydraulic jacking system of the existing tower crane is usually operated manually, whether the tower crane is inclined or not is determined by observing clearance fit between a sliding block or a roller and a standard knot through operators and continuously observing on a climbing frame, and when the tower crane is jacked, operators are required to check whether the tower crane is jacked in place or not, more operators are required during jacking, the labor intensity of the operators is high, and the personnel safety of the operators can be influenced by the high-altitude observation.
Disclosure of Invention
The utility model aims to provide a hydraulic lifting safety control system of a tower crane, which can realize detection of whether a hanging shoe and a stop shoe move in place when the tower crane is lifted, and lock a lifting cylinder for inspection after abnormality occurs; and detecting whether the tower body is inclined.
In order to achieve the aim, the hydraulic jacking safety control system of the tower crane comprises a hydraulic system, a PLC (programmable logic controller), a limit switch I, a limit switch II and an inclination sensor; wherein,
the hydraulic system comprises two subsystems, each subsystem controls the jacking oil cylinders with four oil paths connected in parallel, each subsystem comprises a hydraulic pump, an electromagnetic valve and a balance valve, and the two subsystems share one multi-way valve; in each subsystem, the oil outlet of the hydraulic pump is connected with the right position of the electromagnetic valve, the electromagnetic valve is connected with the oil path of the multi-way valve, one way of the multi-way valve is connected with the rod valve of the jacking oil cylinder, and the other way of the multi-way valve is connected with the rodless cavity of the jacking oil cylinder through the balance valve;
the limit switch I is arranged at the jacking beam of the tower crane and connected with the PLC, and is used for detecting whether the stop shoe moves in place on the step of the standard section;
the limit switch II is arranged at the jacking cross beam of the tower crane, is connected with the PLC and is used for detecting whether the hanging boots move in place on the steps on the standard section;
the inclination angle sensor is arranged at the joint of the two jacking cross beams of the tower crane, is connected with the PLC and is used for detecting whether the tower body of the tower crane is inclined or not;
the PLC is electrically connected with the electromagnetic valve and is used for controlling the electromagnetic valve to change direction after receiving the abnormal signals of the limit switch I, the limit switch II and the inclination angle sensor, so that the jacking oil cylinder stops working.
Further, eight limit switches II are mounted on the jacking beam, and eight limit switches I are mounted on the jacking beam.
Further, the device also comprises a voice prompt device, wherein the voice prompt device is connected with the PLC, and is used for prompting whether the stop shoe moves in place on the step of the standard section to perform voice prompt, prompting whether the hanging shoe moves in place on the step of the standard section to perform voice prompt and prompting that the tower body is inclined abnormally.
Further, the stop shoe comprises a drawing block, a pin penetrating oil cylinder and a base, wherein the drawing block penetrates through a translation hole formed in the jacking beam, the base is fixed on the outer side of the jacking beam and horizontally placed, the pin penetrating oil cylinder is installed on the base, the front end of the pin penetrating oil cylinder is fixedly connected with the rear end of the drawing block and drives the drawing block to move forwards, and the front end of the drawing block is placed on the upper portion of the step of the standard section so as to support the whole jacking sleeve frame.
The beneficial effects of the utility model are as follows:
(1) Eight limit switches I are arranged on the jacking beam, so that whether the stop shoe moves in place on the standard joint step or not can be detected;
(2) Eight limit switches II are arranged on the jacking cross beam, so that whether the hanging boots move in place on the standard knot stepping or not can be detected;
(3) After the limit switch I and/or the limit switch II detect that abnormality occurs, the solenoid valve of the hydraulic system of the PLC controls the jacking cylinder to stop acting, so that the safety of jacking operation is ensured;
(4) An inclination sensor is arranged on the climbing frame to detect whether the tower body is inclined;
(5) The voice prompt device is used for prompting whether the installation of the jacking key part is normal or not, and whether the tower body is inclined or not so as to optimize the jacking operation efficiency and the safety management.
Drawings
FIG. 1 is a schematic view of the structure of the tower crane jacking frame of the present utility model;
FIG. 2 is an enlarged view of the hanging boot;
FIG. 3 is a schematic view of the engagement of the suspension boot with the step;
FIG. 4 is a schematic diagram of a hydraulic system;
in the figure, a 1-hydraulic pump, a 2-electromagnetic valve, a 3-multi-way valve, a 4-balance valve, a 5-jacking oil cylinder, a 6-PLC controller, a 7-limit switch I, an 8-limit switch II, a 9-inclination angle sensor, a 10-jacking sleeve frame, an 11-jacking beam, a 12-jacking cross beam, a 13-stop shoe, a 13-1-drawing block, a 13-2-pin penetrating oil cylinder, a 13-3-base, a 14-hanging shoe, a 15-standard knot and a 16-step.
Detailed Description
The utility model will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1, the lifting frame 10 comprises a lifting beam 11 and a lifting beam 12, the lifting beam 12 is located at the bottom of the lifting beam, and the lifting beam are connected through lifting cylinders 5, eight lifting cylinders 5 are arranged in the lifting system of the tower crane, namely, two lifting cylinders 5 are respectively arranged on each side below the quadrangular connecting frame of the lifting beam 11, so that the whole lifting force and supporting force of the lifting frame 10 can be increased. Eight stop shoes 13 are provided on the lifting beam 11. As shown in fig. 2 and 3, the stopper shoes 13 include a drawing block 13-1, a pin penetrating cylinder 13-2, and a base 13-3. The jacking beam 11 is provided with translation holes penetrating through two sides, and the drawing block 13-1 can horizontally move in the translation holes. The pin penetrating cylinder 13-2 is arranged on the base 13-3, and the head of the pin penetrating cylinder is fixedly connected with the rear part of the drawing block 13-1 to provide power for the translation of the drawing block. The base 13-3 is mounted on the outside of the lifting beam 11. When the jacking sleeve frame 10 is in jacking support, the cylinder rod of the pin penetrating cylinder 13-2 stretches out to push the drawing block 13-1 to pass through the translation hole, and the bottom end of the head of the drawing block is placed on the upper part of the stepping 16 on the standard section 15, so that the eight drawing blocks 13-1 of the jacking beam 11 are all placed on the eight stepping 16 on the standard section. The limit switch II8 is arranged on the base 13-3 and detects the moving distance of the rear part of the drawing block. The shoes 14 are mounted on the lifting beam 12. The number of the hanging shoes 14 is eight, the structure of the hanging shoes is the same as that of the stop shoes 13, and the drawing blocks on the hanging shoes are matched with eight steps at the lower part of the standard knot 15 to support the jacking sleeve frame 10. The limit switch I7 is mounted on the base of the hanging shoe 14. The tilt sensors 9 are mounted at the four corners of the jacking cross member 12.
The utility model relates to a hydraulic jacking safety control system of a tower crane, which comprises a hydraulic system, a PLC (programmable logic controller), a limit switch I, a limit switch II and an inclination sensor; as shown in fig. 4, the hydraulic system comprises two subsystems, each subsystem controls four jacking cylinders with oil paths connected in parallel, each subsystem comprises a hydraulic pump 1, an electromagnetic valve 2 and a balance valve 4, and the two subsystems share a multi-way valve 3; in each subsystem, an oil outlet of a hydraulic pump 1 is connected with the right position of an electromagnetic valve 2, the electromagnetic valve 2 is connected with an oil way of a multi-way valve 3, one way of the multi-way valve 3 is connected with a rod valve of a jacking cylinder 5, and the other way of the multi-way valve is connected with a rodless cavity of the jacking cylinder 5 through a balance valve 4.
The limit switch I7 is connected with the PLC 6 and is used for detecting whether the stop shoe 13 moves in place on the stepping 16 of the standard knot 15.
The limit switch II8 is connected with the PLC 6 and is used for detecting whether the hanging shoe 14 moves in place on the stepping 16 of the standard knot 15.
The inclination sensor 9 is connected with the PLC 6 and is used for detecting whether the tower body of the tower crane is inclined.
The PLC controller 6 is electrically connected with the electromagnetic valve 2 and is used for controlling the electromagnetic valve 2 to change direction after receiving the abnormal signals of the limit switch I7, the limit switch II8 and the inclination angle sensor 8, so that the jacking cylinder 5 stops working.
The working principle of the safety control system is as follows:
1. cylinder extension jacking working condition: the motor drives the hydraulic pump 1 to work, hydraulic oil passes through the right position of the electromagnetic valve 2 and the left position of the multi-way valve 3 to the large cavity of the jacking oil cylinder 5, and the small cavity of the jacking oil cylinder 5 passes through the left position of the multi-way valve 3 to return oil tank during oil return. In the cylinder extension jacking process, signals of a limit switch I7, a limit switch II8 and an inclination angle sensor 9 are detected and fed back in real time, if any situation exceeds a set value, a controller sends out a signal to control the electromagnetic valve 2 to change direction and work at the left position, hydraulic oil output by the hydraulic pump passes through a left-position oil return box of the electromagnetic valve 2, and the hydraulic jacking system stops working. The specific conditions are as follows: if the limit switch I and the limit switch 2 respectively detect that the drawing block of the hanging shoe 14 and the drawing block 13-1 of the stopping shoe 13 are both stretched out to the proper positions, and are correctly placed on the upper part of the stepping 16, the PLC displays normally, if any limit switch has no feedback signal, the PLC controller 6 sends a control signal to the electromagnetic valve 2, the hydraulic system is controlled to stop working, and the staff performs checking treatment. If the data fed back by the inclination angle sensor are detected, whether the gaps between the upper and lower rollers of the jacking sleeve frame 10 and the standard joint 15 are basically consistent or not is observed, and if not, the hydraulic jacking system cannot continue jacking at the moment, the PLC controller 6 signals the electromagnetic valve 2 to control the hydraulic system to stop working, and the inclination angle is returned to normal by adjusting the amplitude trolley position.
2. Cylinder shrinkage descending working condition: the motor drives the hydraulic pump 1 to work, hydraulic oil passes through the right position of the electromagnetic valve 2 and the right position of the multi-way valve 3 to the small cavity of the jacking oil cylinder 5, and the large cavity of the jacking oil cylinder 5 passes through the right position of the multi-way valve 3 to return oil tank during oil return. In the cylinder shrinkage jacking process, data of a limit switch I7, a limit switch II8 and an inclination sensor 9 are detected and fed back in real time, if any situation exceeds a set value, a controller sends a signal to control the electromagnetic valve 2 to change direction and work at the left position, hydraulic oil output by the hydraulic pump passes through a left-position oil return box of the electromagnetic valve 2, and the hydraulic jacking system stops working. The appearance condition is similar to the cylinder extension jacking working condition, and the treatment method is also similar.
In addition, this safety control system still is equipped with voice prompt device, and the device links to each other with PLC control, when limit switch I7, limit switch II8 and inclination sensor 9 detect normally or unusual, through the on-the-spot operating personnel of voice prompt to can improve the work efficiency of tower machine jacking.
The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited thereto, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present utility model, and the present utility model is defined in the claims.
Claims (4)
1. The hydraulic jacking safety control system of the tower crane is characterized by comprising a hydraulic system, a PLC (programmable logic controller) controller (6), a limit switch I (7), a limit switch II (8) and an inclination sensor (9); wherein,
the hydraulic system comprises two sub-systems, each sub-system controls a jacking cylinder (5) with four oil ways connected in parallel, each sub-system comprises a hydraulic pump (1), an electromagnetic valve (2) and a balance valve (4), and the two sub-systems share one multi-way valve (3); in each subsystem, an oil outlet of the hydraulic pump (1) is connected with the right position of the electromagnetic valve (2), the electromagnetic valve (2) is connected with an oil way of the multi-way valve (3), one way of the multi-way valve (3) is connected with a rod valve of the jacking oil cylinder (5), and the other way of the multi-way valve is connected with a rodless cavity of the jacking oil cylinder (5) through the balance valve (4);
the limit switch I (7) is arranged at the jacking beam (11) of the tower crane and connected with the PLC (6) for detecting whether the stop shoe (13) moves in place on the step (16) of the standard section (15);
the limit switch II (8) is arranged at the jacking cross beam (12) of the tower crane and connected with the PLC (6) for detecting whether the hanging boots (14) move in place on the steps (16) on the standard section (15);
the inclination angle sensor (9) is arranged at the joint of the two jacking cross beams (12) of the tower crane and is connected with the PLC (6) for detecting whether the tower body of the tower crane is inclined or not;
the PLC controller (6) is electrically connected with the electromagnetic valve (2) and is used for controlling the electromagnetic valve (2) to change direction after receiving the abnormal signals of the limit switch I (7), the limit switch II (8) and the inclination angle sensor (9), so that the jacking oil cylinder (5) stops working.
2. The hydraulic jacking safety control system of the tower crane according to claim 1, characterized in that eight limit switches II (8) are mounted on the jacking beams (11), and eight limit switches I (7) are mounted on the jacking beams (12).
3. The hydraulic jacking safety control system of a tower crane according to claim 1, further comprising a voice prompt device connected with the PLC controller (6) for voice prompt of whether the stop shoe (13) moves in place on the step (16) of the standard section (15), voice prompt of whether the hanging shoe (14) moves in place on the step (16) of the standard section (15), and prompt of occurrence of inclination abnormality of the tower body.
4. The hydraulic jacking safety control system of the tower crane according to claim 1, wherein the stop shoe (13) comprises a drawing block (13-1), a pin penetrating cylinder (13-2) and a base (13-3), the drawing block (13-1) penetrates through a translation hole formed in the jacking beam (11), the base (13-3) is fixed on the outer side of the jacking beam (11) and horizontally placed, the pin penetrating cylinder (13-2) is mounted on the base (13-3), the front end of the pin penetrating cylinder is fixedly connected with the rear end of the drawing block (13-1) to drive the drawing block (13-1) to move forwards, and the front end of the drawing block (13-1) is placed on the upper portion of the step (16) of the standard joint (15) to support the whole jacking sleeve frame (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321392460.4U CN220201241U (en) | 2023-06-01 | 2023-06-01 | Tower crane hydraulic jacking safety control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321392460.4U CN220201241U (en) | 2023-06-01 | 2023-06-01 | Tower crane hydraulic jacking safety control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220201241U true CN220201241U (en) | 2023-12-19 |
Family
ID=89144188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321392460.4U Active CN220201241U (en) | 2023-06-01 | 2023-06-01 | Tower crane hydraulic jacking safety control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220201241U (en) |
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2023
- 2023-06-01 CN CN202321392460.4U patent/CN220201241U/en active Active
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