CN219489406U - Port crane weight limiter calibrating device under installation condition - Google Patents
Port crane weight limiter calibrating device under installation condition Download PDFInfo
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- CN219489406U CN219489406U CN202320635099.7U CN202320635099U CN219489406U CN 219489406 U CN219489406 U CN 219489406U CN 202320635099 U CN202320635099 U CN 202320635099U CN 219489406 U CN219489406 U CN 219489406U
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Abstract
A weight limiter calibration device for a port crane under installed conditions. The device comprises a supporting frame, a lifting mechanism, a steel wire rope, a hanging basket and a load standard substance; the utility model has the following effects: aiming at the problem of on-site traceability of key parameters of the lifting weight limiter commonly used by the port crane at present, the utility model provides an in-situ calibration device of the lifting weight limiter, solves the problems of high-precision in-situ calibration of indication errors and comprehensive errors of the lifting weight limiter under the condition of no disassembly, provides an effective method for on-site data correction of the lifting weight limiter of the port crane, and improves the measurement precision, data stability and reliability of the lifting weight limiter.
Description
Technical Field
The utility model belongs to the technical field of metering calibration of traffic water transportation port equipment, and particularly relates to a calibration device for a weight limiter for a port crane under a loading condition.
Background
The hoisting capacity limiter is a device for automatically preventing the carrying load of the crane from exceeding the rated hoisting capacity under the condition of considering the power effect during normal operation, is one type of overload protection device, and is specified in GB/T6067.1-2010 hoisting mechanical safety regulations: the lifting machine which is driven by power and has no overturning danger for 1t and above should be provided with a lifting limiter; lifting machines that are at risk of capsizing and do not change their rated lifting weight over a range of amplitude variations should also be provided with lifting weight limiters.
The lifting capacity limiter is used as a necessary sensor of the port crane, and the measuring precision and stability of the lifting capacity limiter are significant for guaranteeing the port operation safety and improving the port operation efficiency. In the aspect of the research of the calibration technology of the lifting capacity limiter, the Chinese patent application No. 200910030367.7 discloses a calibration method and a calibration device of the lifting capacity limiter, and the high-precision calibration and calibration of four sensors can be simultaneously carried out through a specially designed hydraulic device. In chinese patent application No. 202121438000.1, an experimental device for a lifting capacity limiter of a bearing pedestal crane is disclosed, which can obtain performance parameters of the lifting capacity limiter at different temperatures, and evaluate the performance of the lifting capacity limiter more comprehensively and accurately. However, the device is carried out under the laboratory environment condition by detaching the whole lifting limiter from the port crane. In the harbour field, the difficulty is dismantled after the lifting weight limiter is installed, and the dismouting process will lead to harbour machinery operation interruption, seriously influences operating efficiency, and laboratory and scene environmental condition are different, and lifting weight limiter installation fixed mode is different, therefore the calibration result under the laboratory condition can't accurately embody its performance index in-service use.
Therefore, the calibration device for the lifting weight limiter for the port crane is researched, the calibration of key measurement technical indexes of the lifting weight limiter is realized under the installation condition, the problem of tracing the lifting weight limiter under the complex site condition of the port is solved, and the device has important significance and popularization and application value.
Disclosure of Invention
In order to solve the problems, the utility model aims to provide a weight limiter calibration device for a port crane under installed conditions.
In order to achieve the above purpose, the lifting limiter in the lifting limiter calibration device for the port crane under the installed condition comprises a measuring sensor and a display, wherein the measuring sensor is connected with the display in a wired or wireless mode; the calibration device for the weight limiter for the port crane under the installed condition comprises a support frame, a lifting mechanism, a steel wire rope, a hanging basket and a load standard substance; the support frame is of a door-shaped structure and is used for providing a support platform for the whole set of calibration device; the lifting mechanism is arranged in the middle of the cross beam of the support frame and is connected with the upper end of the steel wire rope; the lower end of the steel wire rope is connected with the upper end of the hanging basket; the load standard substance is placed in the hanging basket; the measuring sensor on the hoisting capacity limiter is fixed on the steel wire rope during calibration.
Universal wheels are arranged at the lower end of the supporting frame and at four corners of the bottom of the hanging basket.
The bearing capacity of the steel wire rope is more than or equal to 2 times of the total weight of the hanging basket and the load standard substance, 1-n measuring sensors can be fixed on the steel wire rope in series, and the number of n is determined by the length of the steel wire rope and the size of the measuring sensors.
The hanging basket is cuboid, and the bearing capacity is greater than or equal to 1.2 times of the maximum rated lifting capacity of the lifting capacity limiter.
The load standard substances comprise m unit load standard substances with different masses, the mass of the minimum unit load standard substance is smaller than the resolution of the lifting weight limiter, the total mass of the m unit load standard substances is larger than or equal to 1.5 times of the maximum rated lifting weight of the lifting weight limiter, and the precision is 1 order of magnitude higher than the measurement precision of the lifting weight limiter, wherein m is more than or equal to 3.
The bearing capacity of the supporting frame and the lifting mechanism is more than or equal to 1.5 times of the sum of the total mass of the steel wire rope and the measuring sensor and the maximum rated lifting capacity of the lifting capacity limiter.
The calibration device for the weight limiter for the port crane under the installed condition has the following effects: the method can calibrate the indicating value error and the comprehensive error with high precision under the condition that the lifting weight limiter is not detached from the port crane integrally, provides an effective method for on-site data correction of the lifting weight limiter on the port crane, and improves the measurement precision, data stability and reliability of the lifting weight limiter.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a block diagram of a calibration device for a weight limiter for a port crane under installed conditions.
Detailed Description
The utility model provides a weight limiter calibration device for port cranes under installed conditions, which is described in detail below with reference to the accompanying drawings and specific embodiments.
It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.
As shown in fig. 1, the lifting limiter 400 in the lifting limiter calibration device for the port crane under the installed condition provided by the utility model comprises a measuring sensor 4001 and a display 4002, wherein the measuring sensor 4001 and the display 4002 are connected in a wired or wireless mode; the calibration device for the weight limiter for the port crane under the installed condition comprises a support frame 100, a lifting mechanism 200, a steel wire rope 300, a hanging basket 500 and a load standard substance 600; wherein, the supporting frame 100 has a door-shaped structure and is used for providing a supporting platform for the whole set of calibration device; the lifting mechanism 200 is installed in the middle of the cross beam of the support frame 100 and is connected with the upper end of the wire rope 300; the lower end of the wire rope 300 is connected to the upper end of the basket 500; the load standard 600 is placed in the basket 500; the measurement sensor 4001 on the hoisting capacity limiter 400 is fixed to the wire rope 300 at the time of calibration.
Universal wheels are mounted at the lower end of the supporting frame 100 and at four corners of the bottom of the basket 500, so that the lifting basket can move in a bearing state conveniently.
In structural design, the basket 500 is in a cuboid shape, and is made of cast iron, and the length, width and depth of the basket are 2m×1.5m× 1m, and the bearing capacity is greater than or equal to 1.2 times of the maximum rated lifting capacity of the lifting capacity limiter 400.
The load standard substance 600 includes m unit load standard substances with different masses, the mass of the minimum unit load standard substance is smaller than the resolution of the lifting limiter 400, the total mass of the m unit load standard substances is 1.5 times or more of the maximum rated lifting capacity of the lifting limiter 400, and the precision is 1 order of magnitude higher than the measurement precision of the lifting limiter 400, wherein m is greater than or equal to 3. In this embodiment, the load standard 600 is M 1 Class weights, 20kg weights 25 pieces, 5kg weights 10 pieces, 2kg weights 10 pieces, 1kg weights 10 pieces, 500kg weights 4 pieces, 1t weights 4 pieces, and 6.57t total; after the connection of the lifting mechanism 200, the steel wire rope 300 and the hanging basket 500 is completed, the lifting height of the lifting mechanism 200 is greater than 500mm.
In the bearing design, the bearing capacity of the steel wire rope 300 is greater than or equal to 2 times of the total weight of the hanging basket 500 and the load standard substance 600, and in the embodiment, the diameter of the steel wire rope is 18mm, and the galvanized material can bear the tensile force 14t. The number of measuring sensors 4001 to n which can be serially fixed to the wire rope 300 is determined by the length of the wire rope 300 and the size of the measuring sensors 4001. In this embodiment, a WTA-200 type lifting weight limiter of the micro trickplay limited company is selected, the measuring range is 0-3 t, the resolution is 0.01t, the installation and fixation mode is a side pressure type, and the lifting weight is measured by pressing the steel wire rope 300 in the force value sensing area of the lifting weight limiter 300.
The bearing capacity of the supporting frame 100 and the lifting mechanism 200 is greater than or equal to 1.5 times of the sum of the total mass of the steel wire rope 300 and the measuring sensor 4001 and the maximum rated lifting weight of the lifting limiter 400.
The weight of the hanging basket 500 is 0.15t, so that the design requirement can be met; the carrying capacity of the hanging basket 500 is 6t, and the maximum rated lifting capacity of the lifting capacity limiter 400 is 3t, so that the requirement of 1.2 times can be met; the total mass of the load standard substance is 6.57t, which can meet the requirement that the total mass is not less than 1.5 times the maximum rated lifting capacity of the lifting capacity limiter 400, M 1 The grade accuracy is much higher than the lifting limiter 400 measurement accuracy by 1 order of magnitude; the bearing capacity of the supporting frame 100 and the lifting mechanism 200 is 5t, and the sum of the total mass of the steel wire rope 300 and the measuring sensor 4001 and the maximum rated lifting capacity of the lifting capacity limiter 400 is about 3t, so that the requirement of 1.5 times can be met.
During operation, a worker moves the device to the side of the port crane by using the universal wheels, removes the measuring sensor 4001 on the lifting limiter 400 from the steel wire rope of the port crane and fixes the measuring sensor 4001 on the steel wire rope 300 of the device; a certain amount of load standard substances 600 are loaded in the hanging basket 500, so that the total mass of the hanging basket 500 and the load standard substances 600 is equal to the maximum rated lifting weight of the lifting weight limiter 400, which is 3t in the embodiment, and the hanging basket 500 and the load standard substances 600 are lifted from the ground by using the lifting mechanism 200 and the steel wire rope 300 to calibrate the measuring sensor 4001. After calibration, 0.5t, 1t, 1.5t, 2t, 2.5t, 2.85t (full load early warning point) and 3t (rated lifting point) are selected as calibration points for indicating value error calibration, 3.15t (overload alarm point) is selected for comprehensive error calibration, and at each calibration point, the selection rule of the load standard substance 600 is shown in table 1.
TABLE 1 load standard substance combination design
The error calibration process of the indication value is as follows: at each calibration point, the corresponding number of load standard substances 600 are hoisted by using the calibration device, hoisting is stopped at a position 100-200 mm away from the ground, the hoisting is stabilized for 3min, the load value measured by the lower hoisting weight limiter 400 and the mass of the load standard substances 600 are recorded, the measurement is repeated for 3 times according to the method, the arithmetic average value is taken, and the indication error at each calibration point is calculated according to the formula (1):
wherein:
δ FEi -the error in the indication of the lifting capacity limiter 400 at each calibration point, i=1, 2,3;
L FMi -the arithmetic mean of the load values measured by the load lifting limiter 400 at each calibration point, i=1, 2,3, t;
L FSi -the mass of the load standard 600 at each calibration point, i=1, 2,3, t;
L RS -the maximum rated lifting value, t, of the lifting capacity limiter 400.
The process of the integrated error calibration is as follows: and (3) hoisting weights which are equivalent to 90% of the maximum rated hoisting capacity of the hoisting capacity limiter 400 by using a calibration device, stopping hoisting at a position 100-200 mm away from the ground, stabilizing for 3min, gradually loading to enable the hoisting capacity limiter 400 to act, recording the load value measured by the hoisting capacity limiter 400 and the mass of the load standard substance 600, repeatedly measuring for 3 times according to the method, taking an arithmetic average value, and calculating the comprehensive error at the over-limit alarm position according to a formula (2):
wherein:
δ FC -the lifting limiter 400Is a complex error of (2);
L FMC -the arithmetic mean value of the load values measured by the load lifting limiter 400 at the overrun alarm, t;
L FSC -the lifting capacity limiter 400 loads the arithmetic mean, t, of the mass of the standard substance 600 at the overrun alarm.
The above-described embodiments are only for illustrating the technical spirit and features of the present utility model, and it is intended to enable those skilled in the art to understand the content of the present utility model and to implement it accordingly, and the scope of the present utility model is not limited to the embodiments, i.e. equivalent changes or modifications to the spirit of the present utility model are still within the scope of the present utility model.
Claims (6)
1. A load limiter calibration device for a port crane under installed conditions, wherein the load limiter (400) comprises a measuring sensor (4001) and a display (4002), and the measuring sensor (4001) and the display (4002) are connected in a wired or wireless mode; the method is characterized in that: the calibration device for the weight limiter for the port crane under the installed condition comprises a support frame (100), a lifting mechanism (200), a steel wire rope (300), a hanging basket (500) and a load standard substance (600); the supporting frame (100) is of a door-shaped structure and is used for providing a supporting platform for the whole set of calibration device; the lifting mechanism (200) is arranged in the middle of the cross beam of the support frame (100) and is connected with the upper end of the steel wire rope (300); the lower end of the steel wire rope (300) is connected with the upper end of the hanging basket (500); the load standard substance (600) is placed in the hanging basket (500); a measuring sensor (4001) on the hoisting capacity limiter (400) is fixed to the wire rope (300) at the time of calibration.
2. The calibration device for a weight limiter for a port crane under installed conditions according to claim 1, wherein: universal wheels are arranged at the lower end of the supporting frame (100) and at four corners of the bottom of the hanging basket (500).
3. The calibration device for a weight limiter for a port crane under installed conditions according to claim 1, wherein: the bearing capacity of the steel wire rope (300) is more than or equal to 2 times of the total weight of the hanging basket (500) and the load standard substance (600), 1-n measuring sensors (4001) can be fixed on the steel wire rope (300) in series, and the number of n is determined by the length of the steel wire rope (300) and the size of the measuring sensors (4001).
4. The calibration device for a weight limiter for a port crane under installed conditions according to claim 1, wherein: the hanging basket (500) is cuboid, and the bearing capacity is more than or equal to 1.2 times of the maximum rated lifting capacity of the lifting capacity limiter (400).
5. The calibration device for a weight limiter for a port crane under installed conditions according to claim 1, wherein: the load standard substance (600) comprises m unit load standard substances with different masses, the mass of the minimum unit load standard substance is smaller than the resolution of the lifting limiter (400), the total mass of the m unit load standard substances is 1.5 times or more of the maximum rated lifting capacity of the lifting limiter (400), and the precision is 1 order of magnitude higher than the measurement precision of the lifting limiter (400), wherein m is more than or equal to 3.
6. The calibration device for a weight limiter for a port crane under installed conditions according to claim 1, wherein: the bearing capacity of the supporting frame (100) and the lifting mechanism (200) is more than or equal to 1.5 times of the sum of the total mass of the steel wire rope (300) and the measuring sensor (4001) and the maximum rated lifting weight of the lifting weight limiter (400).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320635099.7U CN219489406U (en) | 2023-03-28 | 2023-03-28 | Port crane weight limiter calibrating device under installation condition |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320635099.7U CN219489406U (en) | 2023-03-28 | 2023-03-28 | Port crane weight limiter calibrating device under installation condition |
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| CN219489406U true CN219489406U (en) | 2023-08-08 |
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| CN202320635099.7U Active CN219489406U (en) | 2023-03-28 | 2023-03-28 | Port crane weight limiter calibrating device under installation condition |
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