Speed classification system for crane balance weight oil cylinder synchronous movement and crane

A technology of synchronous motion and speed grading, applied in fluid pressure actuation system components, mechanical equipment, transportation and packaging, etc., can solve problems such as jitter, poor synchronization accuracy, start-stop shock, etc.

Inactive Publication Date: 2018-06-15
SHAOYANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a speed grading system, a synchronous motion device and a crane for adjusting the synchronous motion of oil cylinders, so

Method used

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  • Speed classification system for crane balance weight oil cylinder synchronous movement and crane
  • Speed classification system for crane balance weight oil cylinder synchronous movement and crane
  • Speed classification system for crane balance weight oil cylinder synchronous movement and crane

Examples

Experimental program
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Effect test

Embodiment 1

[0040] In the optional scheme of this embodiment, such as figure 1 , figure 2 As shown, this embodiment provides a speed classification system for adjusting the synchronous movement of oil cylinders, including a first reversing valve 1, a second reversing valve 2, a damper 20, a flow divider and a collection valve 18, and pressure oil The first oil port 3 and the second oil port 4 of the system circuit are established in the oil circuit and the return oil circuit. According to the expansion and contraction requirements of the actual oil cylinder, the first oil port 3 is connected to the pressure oil circuit, and the second oil port 4 is connected to the return oil circuit, then the oil cylinder can realize the extension action, switch the connection relationship, and connect the third oil port It is connected with the return oil circuit, and the second oil port is connected with the pressure oil circuit to realize the retraction action of the oil cylinder.

[0041] Further,...

Embodiment 2

[0049] In the optional scheme of this embodiment, such as image 3 , Figure 4 As shown, this embodiment provides a speed classification system for adjusting the synchronous movement of oil cylinders. Its principle is similar to that of Solution 1, except that four two-position two-way electromagnetic reversing valves and damping are used to replace the two in Solution 1. Two-position three-way electromagnetic reversing valve 1, 2 and damping 20. During high-speed synchronous movement, keep the solenoid valve DT2\DT3 de-energized at the same time, and the solenoid valve DT1\DT4 is energized at the same time; When synchronizing, if the speed of the first oil cylinder is faster than that of the second oil cylinder, DT1 is powered off and DT2 is powered on, the first oil cylinder is in a low-speed waiting state, and at the same time, DT3 is powered off and DT4 is powered on, and the second oil cylinder is in a high-speed catch-up stage , when the two oil cylinders reach the sta...

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Abstract

The invention discloses a speed classification system for crane balance weight oil cylinder synchronous movement and a crane. The speed classification system for adjusting oil cylinder synchronous movement comprises a first reversing valve, a second reversing valve, a first oil port, a second oil port, a flow dividing and collecting valve and damping parts. The flow dividing and collecting valve comprises a first flow dividing port, a second flow dividing port and a flow collecting port, the flow collecting port communicates with the first oil port, the first flow dividing port communicates with a first connector of the first reversing valve, a second connector of the first reversing valve communicates with a rodless cavity of a first oil cylinder, and a third connector of the first reversing valve passes through the corresponding damping part and then communicates with the rodless cavity of the first oil cylinder. The second flow dividing port communicates with a first connector of the second reversing valve, a second connector of the second reversing valve communicates with a rodless cavity of a second oil cylinder, and a third connector of the second reversing valve passes through the corresponding damping part and then communicates with the rodless cavity of the second oil cylinder. The second oil port is used for communicating with a rod cavity of the first oil cylinder and a rod cavity of the second oil cylinder. According to the system, two-oil-cylinder synchronous movement speed classification control and synchronous control are achieved through the flow dividing and collecting valve, the two damping parts and the two reversing valves.

Description

technical field [0001] The invention relates to the technical field of oil cylinder synchronous hydraulic systems, in particular to a speed classification system for adjusting synchronous movement of oil cylinders, a synchronous movement device and a crane using the system. Background technique [0002] With the acceleration of the replacement of crane products, the weight of the whole vehicle is getting heavier and heavier, but the national standard stipulates that the self-weight of a car on the road cannot exceed 55 tons, and the single-axle bridge load cannot exceed 12 tons. In order to meet the relevant national standards, the production of cranes At the beginning of the design of the counterweight scheme for large wheeled cranes, most of the manufacturers adopt the combined detachable counterweight method, and the installation and fixation of the counterweight are realized through two hydraulic cylinders. In the process of counterweight installation and fixing, it is g...

Claims

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Application Information

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IPC IPC(8): F15B11/22F15B21/08F15B13/02B66C13/20
CPCF15B11/22B66C13/20F15B13/02F15B21/08
Inventor 李光明张彬左从瑞
Owner SHAOYANG UNIV
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