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Internal-pulling type ultrahigh-pressure hydraulic pressure testing machine for large-diameter steel pipe and hydraulic system of hydraulic pressure testing machine

A technology of hydraulic testing machine and hydraulic system, which is applied to fluid pressure actuating system components, using stable tension/pressure to test material strength, mechanical equipment, etc., can solve the problem of small batches of tested steel pipes, low return on investment, Low utilization rate and other problems, to achieve the effect of reducing equipment weight, reducing investment, and fast water filling

Inactive Publication Date: 2015-08-26
XIAN TIANYU HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The weight of the overall equipment is high, the cost is high, the batch of steel pipes to be tested is small, the utilization rate is low, and the return on investment is low

Method used

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  • Internal-pulling type ultrahigh-pressure hydraulic pressure testing machine for large-diameter steel pipe and hydraulic system of hydraulic pressure testing machine

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0035] Such as figure 1 Shown is an inner-pull type ultra-high pressure large-diameter steel pipe hydraulic testing machine and its hydraulic system, including a piston cylinder (2) and a front cover and a rear cover at both ends thereof, as well as a cylinder located in the cylinder (2). The piston (4), the piston rod (5), the back-end serrated nut (3) for fixing the piston (4) and the piston rod (5), and the front-end serrated nut ( 8), the inner sealing mold (6...

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Abstract

The invention relates to an ultrahigh-pressure hydraulic testing machine for a steel pipe, in particular to an internal type ultrahigh-pressure hydraulic pressure testing machine for a large-diameter steel pipe and a hydraulic system of the hydraulic pressure testing machine. The hydraulic testing machine comprises a piston cylinder body, a front cover, a rear cover, a piston, a piston rod, a rear-end zigzag nut, a front-end zigzag nut, an internal sealing mold and an external sealing mold, wherein the front cover and the rear cover are located at two ends of the piston cylinder body; the piston and the piston rod are located in the cylinder body; the rear-end zigzag nut is used for fixing the piton rod; the front-end zigzag nut is used for transmitting force to a tested steel pipe; the internal sealing mold and the external sealing mold are used for sealing and fixing the tested steel pipe; an inner cavity of the cylinder body is divided into a rodless cavity body and a rod cavity by the piston. The hydraulic system comprises a low-pressure oil power system, an electrical-hydraulic closed-loop control system, a high-pressure water pump accumulator power system, a low-pressure water supply system and an oil pressure driving device. According to the hydraulic testing machine and the hydraulic system, cylindrical closed space is formed in the tested steel pipe, and an ultrahigh-pressure hydraulic test can be performed on the tested steel pipe without any other external force; the hydraulic testing machine and the hydraulic system are suitable for the ultrahigh-pressure hydraulic test of the large-diameter steel pipe, the equipment weight can be greatly reduced, and the investment can be reduced by times.

Description

technical field [0001] The invention belongs to the technical field of steel pipe hydraulic testing, in particular to an ultra-high pressure large-diameter steel pipe hydraulic testing machine, in particular to an inner-pull ultra-high pressure large-diameter steel pipe hydraulic testing machine and its hydraulic system. Background technique [0002] In recent years, in order to meet the needs of large-diameter thick-walled seamless steel pipes for structural and transportation purposes in industries such as electric power, petrochemicals, ships, boilers, and military industries, many large-scale pipe-making production equipment have emerged in my country. With the increasing emphasis on the pressure rating of steel pipes, large-scale ultra-high pressure seamless steel pipe hydraulic testing machines are indispensable as pressure testing equipment. [0003] The steel pipe hydraulic testing machine is to first seal the two ends of the steel pipe to be tested, then fill the st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12F15B21/08
Inventor 王佐栋
Owner XIAN TIANYU HEAVY IND
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