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Device for preventing cylinder from moving forwards and crane

The technology of a non-return device and an oil cylinder is applied to the device for preventing the forward movement of the oil cylinder and the field of cranes, which can solve the problems of easy forward movement of the oil cylinder and accidents, and achieve the effect of avoiding the forward movement of the oil cylinder.

Active Publication Date: 2012-11-21
XUZHOU HEAVY MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to propose a device for preventing the forward movement of the oil cylinder and a crane equipped with the device for preventing the forward movement of the oil cylinder, which solves the technical problem in the prior art that the overlift locking oil cylinder is easy to move forward and cause accidents

Method used

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  • Device for preventing cylinder from moving forwards and crane
  • Device for preventing cylinder from moving forwards and crane
  • Device for preventing cylinder from moving forwards and crane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0067] Such as image 3 As shown, the check device 1 in this embodiment includes a check valve 131 and a spring check valve 14, wherein:

[0068] The oil outlet of the check valve 131 is connected in parallel with the oil inlet of the spring check valve 14 and communicates with the first oil port 11 of the check device 1 .

[0069] The oil inlet port of the check valve 131 is connected in parallel with the oil outlet port of the spring check valve 14 and communicates with the second oil port 12 of the check device 1 .

[0070] During the process of liquid flowing out from the rod chamber 31 of the oil cylinder 3, the liquid flowing out from the rod chamber 31 of the oil cylinder 3 passes through the first oil port 11 of the check device 1 from the oil inlet port of the spring check valve 14 to the spring check valve. When the oil outlet direction of the valve 14 flows, if the pressure of the liquid exceeds the predetermined value of the spring check valve 14, the liquid can f...

Embodiment approach 2

[0072] Such as Figure 4 As shown, the check device 1 in this embodiment includes a one-way valve 132 and a throttle valve 15, wherein:

[0073] The oil outlet of the one-way valve 132 is connected in parallel with the oil outlet of the throttle valve 15 and communicates with the first oil port 11 of the check device 1 .

[0074] The oil inlet of the one-way valve 132 is connected in parallel with the oil inlet of the throttle valve 15 and communicates with the second oil port 12 of the non-return device 1 .

[0075] Similar to the principle of the spring check valve 14, the throttle valve 15 can increase the flow rate of the liquid flowing from the rod chamber 31 of the oil cylinder 3 from the oil outlet of the throttle valve 15 to the oil inlet of the throttle valve 15. resistance.

Embodiment approach 3

[0077] Such as Figure 5 As shown, the check device 1 in this embodiment includes a relief valve 16 and a one-way valve 133, wherein:

[0078] Both the oil outlet of the one-way valve 133 and the oil inlet of the relief valve 16 communicate with the first oil port 11 of the check device 1 .

[0079] Both the oil inlet port of the one-way valve 133 and the oil return port of the relief valve 16 communicate with the second oil port 12 of the check device 1 .

[0080] In this example, preferably: the one-way valve 133 is connected in series with the overflow valve 16 .

[0081] Similar to the principle of the spring check valve 14, the overflow valve 16 can also increase the flow of liquid in the rod chamber 31 of the oil cylinder 3 from the first oil port 11 of the check device 1 to the second oil port of the check device 1 12 resistance in the process, and then play the purpose of preventing the oil cylinder 3 from fleeing forward.

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Abstract

The invention discloses a device for preventing a cylinder from moving forwards and a crane and relates to the technical field of engineering machinery, which solve the technical problem that a super-up lock cylinder in the prior art easily moves forwards to cause an accident. The device for preventing the cylinder from moving forwards, provided by the invention, comprises a check device and a reversing valve; a first hydraulic fluid port of the check device is communicated with a rod cavity of the cylinder; the first hydraulic fluid port of the check device and a second hydraulic fluid port of the check device are disconnected when the reversing valve is in a first state, or the first hydraulic fluid port of the check device is communicated with the second hydraulic fluid port of the check device when the pressure of the liquid flowing to the second hydraulic fluid port of the check device from the first hydraulic fluid port of the check device exceeds a preset value; and the first hydraulic fluid port of the check device is communicated with the second hydraulic fluid port of the check device when the reversing valve is in a second state. The crane provided by the invention comprises the device for preventing the cylinder from moving forwards. The device disclosed by the invention is used for preventing the cylinder from moving forwards.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a device for preventing the forward movement of an oil cylinder and a crane provided with the device for preventing the forward movement of the oil cylinder. Background technique [0002] The super-lifting device is a device to improve the performance of the main arm of the crane. The super-lifting arm is added to the basic arm of the main arm to form a triangular structure with the main arm to increase the strength of the main arm and improve the lifting performance. [0003] figure 1 Schematically shows the positional relationship between the super-lift winch 4 and the boom head 61 , the boom tail 62 and the super-lift boom 5 in the prior art. [0004] On modern hoisting machinery, the medium and long-distance hoisting performance of the main arm is increased by using super-lifting devices. When adjusting the working condition of the main boom, it is necessary t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/04
Inventor 王守伟胡小冬张晓磊焦国旺
Owner XUZHOU HEAVY MASCH CO LTD
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