CN108873755B - Anti-seize system and anti-seize detection method for lifting equipment - Google Patents
Anti-seize system and anti-seize detection method for lifting equipment Download PDFInfo
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- CN108873755B CN108873755B CN201810983347.0A CN201810983347A CN108873755B CN 108873755 B CN108873755 B CN 108873755B CN 201810983347 A CN201810983347 A CN 201810983347A CN 108873755 B CN108873755 B CN 108873755B
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- lifting equipment
- lifting
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- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 239000003921 oil Substances 0.000 claims description 41
- 239000010720 hydraulic oil Substances 0.000 claims description 19
- 230000000630 rising effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 230000002159 abnormal effect Effects 0.000 abstract description 5
- 230000002265 prevention Effects 0.000 abstract 5
- 238000010586 diagram Methods 0.000 description 8
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Types And Forms Of Lifts (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
The invention discloses a clamping prevention system and a clamping prevention detection method for lifting equipment, wherein the clamping prevention system comprises an oil pump driving system for driving the lifting equipment and an equipment control center for controlling the oil pump driving system, the oil pump driving system comprises an oil pump, a tee joint interface, a first hydraulic cylinder and a second hydraulic cylinder, the tee joint interface is used for connecting the oil pump, the first hydraulic cylinder and the second hydraulic cylinder, the clamping prevention system further comprises a motor for driving the oil pump, a dynamic detection equipment and a current sensor for detecting the current of the motor, a pressure sensor is further arranged between the oil pump and the tee joint interface, the dynamic detection equipment is connected with the pressure sensor and the current sensor, and the clamping prevention system judges whether the lifting equipment has faults or not through detecting the abnormal current of the motor or the abnormal current of the oil pump driving system, and can judge whether the motor has faults or the machine has a clamping phenomenon through different detected faults, so that the equipment is rapidly judged and rapidly overhauled.
Description
Technical Field
The invention relates to the field of lifting equipment, in particular to an anti-blocking system and an anti-blocking detection method for lifting equipment.
Background
In hydraulic lifting equipment field, including lifting equipment, lifting equipment both sides are provided with the track, two hydraulic system through both sides drive the platform and do elevating movement, at present ordinary lifting equipment can't carry out safety control, when one side guide rail of platform is blocked by the foreign matter or one side of platform blocks the floor, ordinary lifting equipment can't make emergency braking, when lifting equipment takes place the guide rail in the ascending process and blocks the phenomenon, can make lifting equipment unable normal work or lead to other immeasurable harm such as accident occurrence, when lifting equipment takes place the guide rail in the descending process and blocks the phenomenon, the hydro-cylinder can continue to descend at this moment, thereby can lead to the emergence of falling accident, make equipment break down or goods personnel etc. appear the potential safety hazard.
Disclosure of Invention
The invention solves the technical problem of providing an anti-blocking system for lifting equipment, which improves the safety performance.
The technical scheme adopted for solving the technical problems is as follows: the utility model provides an anti-sticking system for lifting device, is including being used for driving lifting device's oil pump actuating system and the equipment control center who controls oil pump actuating system, oil pump actuating system includes oil pump, tee bend interface, first hydraulic cylinder and second hydraulic cylinder, tee bend interface is connected oil pump, first hydraulic cylinder and second hydraulic cylinder, still includes the motor of drive oil pump, including the dynamic check out test set that is used for receiving electric current and oil pressure signal with equipment control center and motor connection, still including the current sensor that is used for detecting motor current, still be provided with pressure sensor between oil pump and the tee bend interface, dynamic check out test set is connected with pressure sensor and current sensor.
Further is: still include first hydraulic pressure flow sensor and second hydraulic pressure flow sensor, its characterized in that: the first hydraulic flow sensor is arranged between the three-way joint and the first hydraulic oil cylinder, and the second hydraulic flow sensor is arranged between the three-way joint and the second hydraulic oil cylinder.
The invention also discloses an anti-blocking detection method for the lifting equipment, when the lifting equipment starts to operate, the dynamic detection equipment detects that the motor is in the set time T after 3 seconds pass 1 The internal current suddenly rises and the current rising quantity reaches the rated current set value I of the motor 1 The dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running.
Further is: the T is 1 May be between 0.5 and 2 seconds, said I 1 Can be any value between 3% and 8%.
Further is: when the lifting equipment is in operation, the rising value of the current reaches the set value I of the rated current of the motor within 5 seconds 2 The dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running.
Further is: the I is 2 Can be any value between 7% and 12%.
Further is: when the pressure sensor detects that the oil pressure rises rapidly or the oil pressure drops rapidly to reach the P value, the dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running.
Further is: the P may be set to 3% to 8% of the normal oil pressure value.
Further is: still include first hydraulic pressure flow sensor and second hydraulic pressure flow sensor, its characterized in that: the first hydraulic flow sensor is arranged between the three-way interface and the first hydraulic oil cylinder, and the second hydraulic flow sensor is arranged between the three-way interface and the second hydraulic oil cylinder;
when the flow value detected by the first hydraulic flow sensor or the second hydraulic flow sensor suddenly rises or suddenly falls to reach M, the dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running.
Further is: the M may be set to between 3% and 10% of the normal flow value.
The beneficial effects of the invention are as follows: the anti-jamming system provided by the invention judges whether the lifting equipment has faults or not by detecting the abnormal current of the motor or the abnormal driving system of the oil pump, and can judge whether the motor has faults or the jamming phenomenon of the machine through different detected faults, so that the equipment can be rapidly judged and overhauled.
Drawings
Fig. 1 is a schematic diagram of an anti-seize system for a lifting device.
Fig. 2 is a first state ripple diagram of the current.
Fig. 3 is a second state ripple diagram of the current.
Fig. 4 is a third state ripple diagram of the current.
Fig. 5 is a fourth state ripple diagram of the current.
Fig. 6 is a flow chart of the first and second hydraulic flow sensors after superposition.
Fig. 7 is a flow chart of the first hydraulic flow sensor or the second hydraulic flow sensor in a normal state.
Fig. 8 is a first hydraulic flow sensor flow diagram.
Fig. 9 is a second hydraulic flow sensor flow chart.
Fig. 10 is a graph showing the pressure values detected by the pressure sensor.
Detailed Description
The invention is further described below with reference to the drawings and the detailed description.
The anti-seizing system for lifting equipment as shown in figure 1 comprises an oil pump driving system for driving the lifting equipment and an equipment control center for controlling the oil pump driving system, wherein the oil pump driving system comprises an oil pump, a tee joint connector, a first hydraulic cylinder and a second hydraulic cylinder, the tee joint connector is used for connecting the oil pump, the first hydraulic cylinder and the second hydraulic cylinder, the anti-seizing system also comprises a motor for driving the oil pump, a dynamic detection equipment connected with the equipment control center and the motor and used for receiving current and oil pressure signals, the anti-seizing system also comprises a current sensor for detecting the current of the motor, a pressure sensor is further arranged between the oil pump and the tee joint connector, the dynamic detection equipment is connected with the pressure sensor and the current sensor, when the dynamic detection equipment is particularly used, the current sensor monitors the current state of the motor in real time, if the current is abnormal, the situation that the lifting equipment is blocked by the guide rail or the motor is damaged can be judged, so that the dynamic detection equipment can immediately send a signal to the equipment control center, the lifting equipment is stopped working, and meanwhile, when the pressure sensor detects that the pressure value is suddenly increased or suddenly decreased, the current sensor detects the current value is suddenly and the guide rail is suddenly increased, the fault is detected, the lifting equipment is immediately, and the lifting equipment is prevented from being sent to the lifting equipment.
On the basis, the hydraulic lifting device further comprises a first hydraulic flow sensor and a second hydraulic flow sensor, wherein the first hydraulic flow sensor is arranged between the three-way connector and the first hydraulic cylinder, the second hydraulic flow sensor is arranged between the three-way connector and the second hydraulic cylinder, and because the lifting device is provided with two independent cylinders, when one side of the lifting device is blocked by the guide rail, hydraulic oil on one side is blocked in the cylinder on the other side, so that the flow values detected by the two hydraulic flow sensors are suddenly increased and suddenly decreased, the flow values detected by the two hydraulic flow sensors are inconsistent, the phenomenon that one side of the lifting device is blocked can be represented, and a blocking phenomenon can be immediately judged by a standing horse, at the moment, the dynamic detection device can immediately send a signal to a device control center, so that the lifting device stops working, and therefore, the lifting device is protected.
The method comprises the following steps: when the lifting device starts to operate, the dynamic detection device detects that the motor is at the set time T after 3 seconds pass 1 The internal current suddenly rises and the current rising quantity reaches the rated current set value I of the motor 1 The dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running, and the T is that 1 Can be between 0.5 and 2 seconds, such as T 1 1 second, 1.5 second, 2 seconds, said I 1 Can be any one of 3% -8%, such as 3%, 5%, 6%, 8%, T as above 1 And I 1 The number of (2) can be selected according to actual conditions, and before working, different rated current values of the motor can be set according to the use of different motors, such as 20A,22A, etc., when the preset current value is 20A, if I 1 Set to 5%, when the current is at T 1 When 1A is suddenly lifted, the lifting device stops running, and the following two embodiments are provided: the first embodiment is shown in fig. 2, in which when the current sensor detects that the rising value of the motor current reaches 5% of the rated current of the motor within 1 second, the lifting device can be judged to have a clamping stagnation phenomenon, the dynamic detection device can immediately send a signal to the device control center to stop the lifting device, the second embodiment is shown in fig. 4, in which when the current sensor detects that the rising value of the motor current reaches 6% of the rated current of the motor within 1.5 seconds, the lifting device can be judged to have a clamping stagnation phenomenon, and the dynamic detection device can standThe current sensor monitors the current after 3 seconds from the starting of the lifting equipment, thereby ensuring the accuracy of monitoring.
On the basis of the above, when the lifting equipment is in operation, the rising value of the current reaches the set value I of the rated current of the motor in a period of 5 seconds 2 The dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running, wherein I is as follows 2 Can be any one of the values between 7% and 12%, I is as described above 2 The number of (2) may be selected according to practical situations, such as 7%, 9%, 10%, 12%, and the following are two examples: in the first embodiment, as shown in fig. 3, in a period of 5 seconds, the rising value of the current reaches 9% of the rated current of the motor, the dynamic detection device signals to the device control center to control the lifting device to stop running, when the current sensor detects that the rising value of the current of the motor reaches 5% of the rated current of the motor in 1 second, the lifting device can be judged to have a clamping stagnation phenomenon, the dynamic detection device can immediately send a signal to the device control center to stop the lifting device, in the second embodiment, as shown in fig. 5, in a period of 5 seconds, the rising value of the current reaches 9% of the rated current of the motor, the dynamic detection device signals to the device control center to control the lifting device to stop running, and when the current sensor detects that the rising value of the current of the motor reaches 6% of the rated current of the motor in 1.5 seconds, the lifting device can be judged to have a clamping stagnation phenomenon, and the dynamic detection device can immediately send a signal to the device control center to stop running.
On the basis of the above, when the pressure sensor detects that the oil pressure rises rapidly or the rapid falling amount reaches the value P, the dynamic detection device signals to the device control center to control the lifting device to stop running, wherein P can be set to be 3 to 8 percent of the normal oil pressure value, P can be optionally 3, 5, 7 and 8 percent or the like, different normal oil pressure values such as 2MPa,3MPa or the like can be set in advance according to different oil cylinders before working, when the current value set in advance is 2MPa, if P is set to be 5 percent, when the pressure sensor detects that the oil pressure rises rapidly or the rapid falling amount reaches 0.1MPa, the lifting device stops running, as shown in fig. 10, when the oil pressure value detected by the pressure sensor reaches the value P of the normal oil pressure value in the lifting process, the lifting device is blocked at the moment, the dynamic detection device can immediately send a signal to the device control center to stop working according to the fact that the fault is blocked in the lifting process, when the oil pressure value detected by the pressure sensor reaches the value P of the normal oil pressure value suddenly falling, the lifting device is blocked at the moment, the lifting device can immediately sent to the moment, and the lifting device is stopped to work is stopped when the dynamic detection device is stopped at the moment, the fault is detected in the lifting device is suddenly falling in the lifting device, and the lifting device is stopped to move to the lifting device is immediately when the lifting device is detected to the working suddenly and the lifting device is stopped.
On the basis, the hydraulic control system further comprises a first hydraulic flow sensor and a second hydraulic flow sensor, wherein the first hydraulic flow sensor is arranged between the tee joint interface and the first hydraulic cylinder, the second hydraulic flow sensor is arranged between the tee joint interface and the second hydraulic cylinder, as shown in the figure, fig. 6 is a flow diagram after superposition of the first hydraulic flow sensor and the second hydraulic flow sensor, and fig. 7 is a flow diagram of the first hydraulic flow sensor or the second hydraulic flow sensor in a normal state;
when the flow value detected by the first hydraulic flow sensor or the second hydraulic flow sensor suddenly rises or suddenly drops to M, the dynamic detection device signals to the device control center, the lifting device is controlled to stop operating, the M can be set to be 3-10% of the normal flow value and can be 3%, 5%, 7%, 10% and the like, before the hydraulic device works, different flow values such as 500ml and 600ml can be set in advance according to different cylinders, when the current value set in advance is 500ml, if the current value set in advance is 5%, the flow value detected by the first hydraulic flow sensor or the second hydraulic flow sensor suddenly rises or suddenly drops to 25ml, hydraulic oil passing through the lifting device is reserved in cylinders on the other side, the hydraulic oil quantity of the hydraulic oil leading to the two cylinders suddenly rises, namely, when the lifting device at the first clamping position suddenly rises, the first hydraulic flow sensor suddenly drops, the hydraulic device rapidly rises or suddenly drops, the hydraulic device immediately stops operating, and the hydraulic device suddenly stops operating, and the hydraulic device immediately stops operating, and the flow value is suddenly drops, and the hydraulic device immediately stops operating, and the hydraulic device rapidly drops, and the flow value is immediately stops when the lifting device suddenly rises.
While the foregoing is directed to embodiments of the present invention, other and further details of the invention may be had by the present invention, it should be understood that the foregoing description is merely illustrative of the present invention and that no limitations are intended to the scope of the invention, except insofar as modifications, equivalents, improvements or modifications are within the spirit and principles of the invention.
Claims (9)
1. A prevent card system for jacking equipment, including being used for driving jacking equipment's oil pump actuating system and the equipment control center who controls oil pump actuating system, oil pump actuating system includes oil pump, tee bend interface, first hydraulic cylinder and second hydraulic cylinder, tee bend interface connects oil pump, first hydraulic cylinder and second hydraulic cylinder, still includes the motor of drive oil pump, its characterized in that: the dynamic detection device is connected with the device control center and the motor and used for receiving current and oil pressure signals, and further comprises a current sensor used for detecting motor current, wherein a pressure sensor is further arranged between the oil pump and the tee joint, and the dynamic detection device is connected with the pressure sensor and the current sensor;
the hydraulic system further comprises a first hydraulic flow sensor and a second hydraulic flow sensor, wherein the first hydraulic flow sensor is arranged between the tee joint interface and the first hydraulic oil cylinder, and the second hydraulic flow sensor is arranged between the tee joint interface and the second hydraulic oil cylinder;
when the clamping stagnation phenomenon occurs on one side of the lifting equipment, hydraulic oil which originally passes through the lifting equipment can be reserved in the oil cylinders on the other side, so that the hydraulic oil quantity of one side of the hydraulic oil which is led to the two hydraulic oil cylinders is suddenly increased, the hydraulic oil quantity of the other side of the hydraulic oil is suddenly decreased, and the side of the hydraulic oil quantity suddenly decreased is the guide rail clamping side.
2. An anti-seize detection method for lifting devices, comprising the anti-seize system for lifting devices as claimed in claim 1, characterized in that: when the lifting equipment starts to operate, after 3 seconds, the dynamic detection equipment detects that the current of the motor suddenly rises within the set time T1, the current rising amount reaches the rated current set value I1 of the motor, and the dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop operating.
3. The anti-seize detection method for lifting equipment as claimed in claim 2, characterized in that: the T1 is between 0.5 and 2 seconds, the I1 is any one value between 3% and 8%, and the rated current of the motor is set in advance.
4. The anti-seize detection method for lifting equipment as claimed in claim 2, characterized in that: when the lifting equipment is in the running process, the rising value of the current reaches the set value I2 of the rated current of the motor within 5 seconds, and the dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running.
5. The anti-seize detection method for lifting equipment as defined in claim 4, characterized in that: the I2 is any value between 7% and 12%.
6. The anti-seize detection method for lifting equipment as claimed in claim 2, characterized in that: when the pressure sensor detects that the oil pressure rises rapidly or the oil pressure drops rapidly to reach the P value, the dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running.
7. The anti-seize detection method for lifting equipment as defined in claim 6, characterized in that: the P is set to 3 to 8% of a normal oil pressure value, which is set in advance.
8. The anti-seize detection method for lifting equipment as defined in claim 6, characterized in that: still include first hydraulic pressure flow sensor and second hydraulic pressure flow sensor, its characterized in that: the first hydraulic flow sensor is arranged between the three-way interface and the first hydraulic oil cylinder, and the second hydraulic flow sensor is arranged between the three-way interface and the second hydraulic oil cylinder;
when the flow value detected by the first hydraulic flow sensor or the second hydraulic flow sensor suddenly rises or suddenly falls to reach M, the dynamic detection equipment signals to the equipment control center to control the lifting equipment to stop running.
9. The anti-seize detection method for lifting equipment as claimed in claim 8, characterized in that: the M is set to be between 3% and 10% of a normal flow value, which is set in advance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983347.0A CN108873755B (en) | 2018-08-28 | 2018-08-28 | Anti-seize system and anti-seize detection method for lifting equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810983347.0A CN108873755B (en) | 2018-08-28 | 2018-08-28 | Anti-seize system and anti-seize detection method for lifting equipment |
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| CN108873755A CN108873755A (en) | 2018-11-23 |
| CN108873755B true CN108873755B (en) | 2024-03-15 |
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| CN111539478A (en) * | 2020-04-26 | 2020-08-14 | 成都见田科技有限公司 | Intelligent diagnosis method, system and diagnosis equipment for elevator faults |
| CN113525959B (en) * | 2021-06-01 | 2022-11-25 | 陶朗环保技术(厦门)有限公司 | Glass bottle recycling machine and glass bottle soft descending control method |
| CN118159484A (en) | 2021-12-02 | 2024-06-07 | 株式会社日立制作所 | Maintenance device for electric working device for emergency stop device |
| CN117879437A (en) * | 2024-03-13 | 2024-04-12 | 三一重型装备有限公司 | Control system and self-moving tail |
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| CN108873755A (en) | 2018-11-23 |
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