Safe and reliable derrick lifting multi-stage cylinder

A multi-stage cylinder, reliable technology, applied in the direction of fluid pressure actuators, etc., to achieve the effect of smooth operation, stable operation and reduced load

Active Publication Date: 2018-05-01
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 multi-stage cylinder
  • Safe and reliable derrick lifting multi-stage cylinder
  • Safe and reliable derrick lifting multi-stage cylinder

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Experimental program
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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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PUM

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Abstract

The invention discloses a safe and reliable derrick lifting multi-stage cylinder, which comprises: a cylinder body, a first-stage piston rod, a second-stage piston rod and a third-stage piston rod, forming a first rod chamber, a second rod chamber and a third rod chamber. There is a rod cavity, and the inside of the three-stage piston rod is a rodless cavity; the rear end of the three-stage piston rod is equipped with a piston, and the multi-stage cylinder also includes a first-stage guide sleeve, a second-stage guide sleeve and a third-stage guide sleeve. The sleeves are all provided with exhaust ports, and the front end of the three-stage piston rod is connected with the rod head; The rear part of the first-stage piston rod is provided with three-stage oil passage holes, the first-stage oil passage hole and the second-stage oil passage hole are both stepped holes; the rod head has a first oil port and a second oil port, and the first oil port is connected to a An oil pipe, the oil pipe communicates with the third rod chamber, and the second oil port communicates with the rodless chamber. Through the above method, the present invention has reasonable structure, large stroke, stable performance, safety and reliability.

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 petroleum 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. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(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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