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Ultrahigh-pressure large-flow-rate supercharged hydraulically controlled stop valve and application thereof

An ultra-high pressure, globe valve technology, applied in the direction of fluid pressure actuation device, servo motor assembly, mechanical equipment, etc., can solve problems such as unfavorable system efficient utilization, lack of hydraulic control ultra-high pressure and large flow globe valve design, large energy loss, etc.

Active Publication Date: 2014-02-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid produces a throttling effect, and the throttling control is an irreversible energy change process, which has a large energy loss, which is not conducive to the efficient utilization of the system, and is expensive
[0004] At present, domestic research is mainly aimed at high-pressure valves that use manual switch valve modulation switch mode, and lacks the design of electronically controlled and hydraulically controlled ultra-high pressure and large flow cut-off valves with pressures higher than 15Mpa.

Method used

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  • Ultrahigh-pressure large-flow-rate supercharged hydraulically controlled stop valve and application thereof
  • Ultrahigh-pressure large-flow-rate supercharged hydraulically controlled stop valve and application thereof
  • Ultrahigh-pressure large-flow-rate supercharged hydraulically controlled stop valve and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as Figure 1-5 shown.

[0049] An ultrahigh pressure and large flow pressurized hydraulic control shut-off valve, comprising a valve seat 1, a low pressure valve body 2 and an ultrahigh pressure valve body 8, the valve seat 1 is in sealing connection with one end of the low pressure valve body 2, the The other end of the low-pressure valve body 1 is connected to the ultrahigh-pressure valve body 8; a piston 5 is arranged through the valve seat 1 and the low-pressure valve body 2, and the valve seat 1 and the low-pressure valve body 2 are formed by the piston 5 The inner cavity of the valve is divided into I oil chamber and II oil chamber. A piston rod 11 connected to the piston 5 is arranged in the ultra-high pressure valve body 8, and an oil inlet 23 is arranged on the valve seat 1. The low-pressure valve body 2 is provided with an oil return port 24, the front end of the ultra-high pressure valve body 8 is provided with a III oil chamber, and the front portion o...

Embodiment 2

[0061] As described in Example 1, the difference is that the piston rod 11 is quenched and tempered to a hardness of 229-285HB after being processed, and then undergoes high-frequency quenching to reach a hardness of 45HB. ~55HRC; the roundness tolerance value is selected according to the 9th grade precision; the end face verticality tolerance value is selected according to the 7th grade precision; the thread on the piston rod is processed according to the 6th grade precision;

Embodiment 3

[0063] An ultra-high pressure and large flow pressurized hydraulic control shut-off valve as described in Example 1, the difference is that the cross-sectional diameter of the low-pressure valve body is 5 times the cross-sectional diameter of the ultra-high pressure valve body.

[0064] The valve seat, low-pressure valve body, piston and piston rod are all made of No. 45 steel, the heat treatment temperature is 740-760°C, the holding time is 4-6h, and the cooling rate is 50-100°C / h. Temperature ≤ 600 ℃, air cooling out of the oven, hardness ≤ 197HBS before treatment, hardness ≤ 156HBS after treatment.

[0065] The material of the ultra-high pressure valve body is 40Cr alloy steel, quenched and tempered, the quenching temperature is 850°C±10°C, oil-cooled and tempered, and the hardness is between HRC32-36.

[0066] The tolerance value of the verticality between the end surface of the valve seat and the axis is selected according to the 7th grade precision; the surface roughness...

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Abstract

The invention relates to an ultrahigh-pressure large-flow-rate supercharged hydraulically controlled stop valve and the application thereof. The stop valve comprises a valve base, a low-pressure valve body and an ultrahigh pressure valve body; the valve base is hermetically connected with one end of the low-pressure valve body, and the other end of the low-pressure valve body is connected with the ultrahigh pressure valve body; a piston penetrates through the valve base and the low-pressure valve body, and divides a cavity defined by the valve base and the low-pressure valve body into an oil chamber I and an oil chamber II; the ultrahigh pressure valve body is internally provided with a piston rod which is connected with the piston; the valve base is provided with an oil inlet; the low-pressure valve body is provided with an oil return opening; the front end of the ultrahigh pressure valve body is provided with an oil chamber III; the front part of the ultrahigh pressure valve body is provided with a system oil outlet; one side of the oil chamber III is provided with an unloading port. The invention discloses the ultrahigh-pressure large-flow-rate supercharged stop valve which can bear pressure of 125 MPa; a hydraulic system is used for outputting pressure and the flow so as to control the ultrahigh-pressure large-flow-rate supercharged stop valve, so that the opening and closing of the stop valve are realized, the pressure can be maintained, the requirements of large flow rate and ultrahigh pressure can be met.

Description

technical field [0001] The invention relates to an ultra-high pressure and large flow pressurized hydraulic control cut-off valve and its application, belonging to the technical field of control elements for cutting off liquid flow. Background technique [0002] The stop valve is a control element used to cut off the liquid flow in the hydraulic system. The change of the valve seat port is proportional to the stroke of the valve disc. It belongs to the forced sealing valve and is used in industrial technical fields, such as water injection pumping stations, high-pressure gas power system, pipeline cleaning press test machine, ultra-high pressure test bench and other hydraulic systems. [0003] The existing types of globe valves include manual globe valves, electric globe valves and flanged gate valves. Most of the manual stop valves adopt the method of manually adjusting the opening of the valve port by threading mechanically. The common feature is that the handwheel is man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F15B13/02
Inventor 周军李卫曾印平张成梁
Owner SHANDONG UNIV
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