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Safe and reliable derrick lifting multistage cylinder

A multi-stage cylinder, reliable technology, applied in the direction of fluid pressure actuation device, etc., to achieve the effect of stable operation, reducing oil resistance, and improving the stability of the pressure rod

Active Publication Date: 2016-02-03
JIANGSU HENGLI HYDRAULIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The derrick is in a horizontal position when it is initially installed, and the derrick is generally lifted to a vertical position by a lifting cylinder during use. The existing lifting cylinder still needs to be improved

Method used

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  • Safe and reliable derrick lifting multistage cylinder
  • Safe and reliable derrick lifting multistage cylinder
  • Safe and reliable derrick lifting multistage cylinder

Examples

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0029] see Figure 1 to Figure 4 , the embodiment of the present invention includes:

[0030] A safe and reliable derrick lifting multi-stage cylinder, comprising: a cylinder body 1, a first-stage piston rod 2, a second-stage piston rod 3 and a third-stage piston rod 4 arranged sequentially from outside to inside, the rear end of the first-stage piston rod 2 There is a first limit nut 22 at the end, and a second limit nut 23 is provided at the rear end of the secondary piston rod 3, and a rear end cover 5 is fixed a...

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Abstract

The invention discloses a safe and reliable derrick lifting multistage cylinder which comprises a cylinder body, a first-stage piston rod, a second-stage piston rod and a third-stage piston rod, wherein a first rod cavity, a second rod cavity and a third rod cavity are formed; a rodless cavity is formed inside the third-stage piston rod; a piston is assembled at the rear end of the third-stage piston rod; the multistage cylinder further comprises a first-stage guiding sleeve, a second-stage guiding sleeve and a third-stage guiding sleeve; an exhaust port is formed in each guiding sleeve; the front end of the third-stage piston rod is connected with a rod head; a first-stage oil hole is formed in the rear portion of the first-stage piston rod; a second-stage oil hole is formed in the rear portion of the second-stage piston rod; a third-stage oil hole is formed in the rear portion of the third-stage piston rod; both the first-stage oil hole and the second-stage oil hole are stepped holes; a first oil port and a second oil port are formed in the rod head; the first oil hole is connected with an oil pipe; the oil pipe is communicated with the third rod cavity; and the second oil port is communicated with the rodless cavity. According to the safe and reliable derrick lifting multistage cylinder, the structure is reasonable, the stroke is large, the performance is stable, and the cylinder is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of oil cylinders, in particular to a safe and reliable derrick lifting multistage cylinder. Background technique [0002] Oil is a fluid mineral buried deep in the ground. The role of petroleum in the national economy Petroleum is an important energy source. Compared with coal, it has high energy density (the heat of combustion of oil with equal weight is 50% higher than that of standard coal), convenient transportation and storage, and less pollution to the atmosphere after combustion. advantage. Fuel oil extracted from petroleum is the main fuel for various kilns in transportation vehicles, power station boilers, metallurgical industry and building materials industry. Liquefied petroleum gas and pipeline gas, which use petroleum as raw material, are high-quality fuels used by urban residents. Airplanes, tanks, ships, rockets, and other spacecraft also consume large amounts of petroleum fuel. Therefore,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B15/16F15B15/20
Inventor 汪立平邱永宁韩月环
Owner JIANGSU HENGLI HYDRAULIC
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