Method and device for online real-time measurement of the lower deflection of the middle section of the boom
A real-time measurement and boom technology, which is applied in the direction of transportation and packaging, load hanging components, cranes, etc., can solve the problems of cumbersome measurement, inability to obtain the deflection value in real time, inconvenient measurement, etc., so as to facilitate subsequent adjustment and real-time On-line detection to ensure the effect of construction safety
Active Publication Date: 2017-12-15
CHINA FIRST METALLURGICAL GROUP
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The above two methods have the following disadvantages: the deflection value cannot be obtained in real time, the measurement is cumbersome, and it is not convenient to measure when the boom is dynamic in the air
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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0028] see figure 1 , A jack includes a lifting frame 1, a thin steel wire 2, a thin waist 3, a main pull arm rope 4, a boom 5, a cab 6, a crawler frame 7, and a counterweight 8. The boom 5 is provided with a device for online real-time measurement of the lower deflection of the middle section of the boom.
[0029] see Figure 1-Figure 7 The device for online real-time measurement of the lower deflection of the middle section of the boom includes a first hanging point, a second hanging point, a thin steel wire 2, a sliding wire rheostat 16, and a controller located at the cab 6; the first hanging...
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The invention discloses a device for measuring the downward deflection of a middle section of a crane jib online in real time. The device for measuring the downward deflection of the middle section of the crane jib online in real time comprises a first hanging point, a second hanging point, a tensioning mechanism, a rheochord and a controller. The tensioning mechanism is connected with the first hanging point and the second hanging point and fixed to a movable sliding head of the rheochord through a fine steel wire clamp. The rheochord is fixed to the crane jib and comprises a thin slide bar, a thick slide bar and a movable sliding head. The thin slide bar and the thick slide bar are both fixed to a support. The two ends of the thin slide bar and the two ends of the thick slide bar are provided with binding posts. The moving sliding head is arranged on the thin slide bar. A contact pin of the slide bar is in contact with the thick slide bar. The binding posts at one end of the thin slide bar and one end of the thick slide bar are connected with the controller through wires. The controller obtains the real-time downward deflection values of the crane jib according to the change of the resistance value of the rheochord. The invention further provides a method for measuring the downward deflection of the middle section of the crane jib online in real time. By the adoption of the method and device for measuring the downward deflection of the middle section of the crane jib online in real time, the downward deflection value of the crane jib can be measured online in real time.
Description
technical field [0001] The invention belongs to the technical field of cranes, and in particular relates to a method and a device for online real-time measurement of the lower deflection of the middle section of a boom. Background technique [0002] With the continuous improvement of the requirements for the lifting height and hoisting range of the crane, the length of the jib of the crane is also correspondingly increased. In order not to sacrifice the lifting capacity, it is required that the weight of the jib is increased less, which makes the existing jib a long and slender bent structure. When this kind of boom is raised horizontally, due to its own weight, the whole boom, especially the middle part, will have a downward deflection, and the longer the length of the boom, the more serious the downward deflection, and even instability. Therefore, it is necessary to monitor the downdeflection value of the boom in real time. The existing method of measuring the deflection...
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IPC IPC(8): B66C13/16B66C23/62
CPCB66C13/16B66C23/62
Inventor 董武
Owner CHINA FIRST METALLURGICAL GROUP
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