CN2258562Y

CN2258562Y - T-type ultrahigh pressure hydraulic control unloader valve

Info

Publication number: CN2258562Y
Application number: CN 96232932
Authority: CN
Inventors: 柴焱
Original assignee: 柴焱
Current assignee: Chuanxi Machine Plant, China Aviation Industry General Company
Priority date: 1996-04-05
Filing date: 1996-04-05
Publication date: 1997-07-30
Anticipated expiration: 2006-04-05

Abstract

The utility model provides a T-type ultrahigh pressure hydraulic control unloader valve, which is suitable for pressure relief of a hydraulic system of an ultrahigh pressure device, particularly serious medium pollution industries, such as powder metallurgy, etc. The utility model is formed by that a sealing gasket is pressed tightly on a valve body by a plug screw through a pressure pad, an ultrahigh pressure sealing ring and an O-type sealing ring are sheathed on the pressure pad which is inlaid with a retainer ring, and a piston cylinder is pressed tightly on the valve body by a screw with a flange. A valve rod is pressed tightly on a piston by a spring. The piston, the spring and the valve rod are arranged in the piston cylinder, and standard balls are arranged on the piston and the valve rod which can move along the axial direction in the piston cylinder. The combination of the standard ball and the sealing gasket is formed. The utility model has the advantages of favorable sealing and pressure relief performance, convenient maintenance, etc.

Description

T type ultrahigh pressure hydraulic unloading valve

The utility model relates to a kind of extra-high tension unit hydraulic control release valve member, is suitable for extra-high tension unit (pressure can reach 600MPa) hydraulic system and does release and use, and is particularly suitable for the serious industry of medium pollution such as powder metallurgy and is used to make new equipment or transforms used equipment.

Existing ultrahigh pressure hydraulic unloading valve generally all adopts low voltage control hydraulic oil to promote piston, and piston promotes cone valve, forms the purpose that pressure stress reaches sealing ultrahigh pressure medium (liquid or gas) on a valve body or a transition pad.Because during the off-load of ultrahigh pressure medium, the cone valve that seals is washed away well damage, particularly in the powder metallurgy industry, the ultrahigh pressure medium can be polluted by powder inevitably, thus cone valve damage fast, change frequent, cone valve processing difficulties, cost height.The maintain and replace easily damaged parts also must be dismantled all component such as pilot line and piston, very inconvenience.

The purpose of this utility model is exactly in order to overcome above-mentioned prior art deficiency, designs a kind of can reaching and seals or release, makes hydraulic unloading valve easy to maintenance, that cost is low again.

The purpose of this utility model is such realization: sealing gasket is pressed on the valve body by plug screw by pressure pad, superhigh pressure sealing ring, O RunddichtringO be enclosed within on the pressure pad that studs with back-up ring and piston cylinder by flange by screw in compression on the valve body, spring is pressed on valve rod on the piston, piston spring and valve rod are packed in the piston cylinder, on the piston that can in piston cylinder, move vertically, the valve rod master ball is housed, forms the combination of master ball and sealing gasket.

Master ball and awl spring are contained in the pressure pad and by the awl spring master ball are pressed on the sealing gasket.

Plug screw is replaceable to be flange.

The utility model makes it have reliable sealing, release and easy to maintenance, low cost and other advantages owing to adopted said structure.As the master ball and the sealing gasket of primary seal easily damaged parts, though damage frequently in the powder metallurgy industry, master ball is with low cost, so maintenance cost is lower.And adopt the utility model unloading valve, when changing easily damaged parts (master ball and sealing gasket), only need plug screw and gland taking-up is promptly replaceable, and need not other component such as dismounting control oil pipe line and piston.

Describe in detail below in conjunction with accompanying drawing.

Fig. 1 is the main sectional view of looking of a kind of concrete structure of the utility model (open in usual).

Fig. 2 is the main sectional view of looking of the another kind of concrete structure of the utility model (Normally closed type).

Code name implication among the figure: 1,25 plug screws, 2,26 valve bodies, 3,21,45,49 leakage holes, 4,28 superhigh pressure sealing circles 5,

29O RunddichtringO

6,19,30,43 back-up rings 7,27

pressure pads

8,34 sealing gaskets 9,33 return openings 10,32

master ball

11,17,18,24,37,40,42,47

seal rings

12,36

piston cylinders

13,46 springs 31

awl springs

14,39

control ports

15,41

flanges

16,38

screws

20,44 pistons 22,35

valve rods

23,48 pressure hydraulic fluid ports

Embodiment one: with reference to Fig. 1, sealing gasket 8 is pressed on the valve body 2 by plug screw 1 by pressure pad 7, and superhigh pressure sealing ring 4, O RunddichtringO 5 are enclosed within on the pressure pad 7 that studs with back-up ring 6.Piston cylinder 12 by flange 15 by screw 16 be pressed on the valve body 2, spring 13 is pressed on valve rod 22 on the piston 20, piston 20, spring 13 and valve rod 22 are packed in the piston cylinder 12, and master ball 10 (master ball can adopt steel ball or ceramic ball) is housed on piston 20 that can move freely vertically in piston cylinder 12 and the valve rod 22.Form seal combination by master ball 10 and sealing gasket 8.

Seal ring

11,17,18,24 and back-up ring 19 are contained in respectively separately on the related components.Seal ring (11,17,18,24) and back-up ring 19 play a part fluid-encapsulated, 13 reset responses of spring.This is a T type ultrahigh pressure hydraulic unloading valve open in usual.

Working procedure: super high pressure fluid enters in the valve body 2 from pressure hydraulic fluid port 23, when valve cuts out, promote piston 20 by the control oil that enters from control port 14, piston 20 promotes valve rod 22, valve rod 22 is pressed on (dotted line ball among the figure) on the sealing gasket 8 with master ball 10, thus the sealing super high pressure fluid.When valve need be opened, control port 14 releases, at this moment super high pressure fluid is pushed master ball 10 open, and valve rod 22 and piston 20 are resetted by spring 13, and super high pressure fluid can be through return opening 9 releases.

Embodiment two: with reference to Fig. 2, sealing gasket 34 is pressed on the valve body 26 by plug screw 25 by pressure pad 27, and superhigh pressure sealing ring 28, O RunddichtringO 29 are enclosed within the valve body 26 of packing on the pressure pad 27, and back-up ring 30 is set on the pressure pad 27.Master ball 32 and awl spring 31 are contained in the pressure pad 27 and by awl spring 31 master ball 32 are pressed on the sealing gasket 34.Piston cylinder 36 is pressed on the valve body 26 by screw 38 by flange 41, piston 44 also can move in piston cylinder 36 vertically, spring 46 and valve rod 35 are contained in the piston cylinder 36, valve rod 35 can move in piston cylinder 36 vertically, and spring 46 is pressed on valve rod 35 on the piston 44.

Seal ring

37,40,42,47 and back-up ring 43 be contained on each correlated parts respectively, it is fluid-encapsulated to play a part.This is a Normally closed type T type ultrahigh pressure hydraulic unloading valve.Normally closed type T type ultrahigh pressure hydraulic unloading valve working procedure: when control port 39 was not controlled oil, the super high pressure fluid that enters from pressure hydraulic fluid port 48 was pressed on master ball 32 on the sealing gasket 34, guaranteed the good seal of valve.During off-load, control oil from control port 39 promotes piston 44, piston 44 promotes valve rod 35 and master ball 32 is backed down (dotted line ball among the figure), thereby reach the off-load purpose, after off-load finishes, control oil is from control port 39 releases, and spring 46 resets valve rod 35 and piston 44, and awl spring 31 resets master ball 32.Comparing with embodiment one has increased the awl spring and the sealing gasket position is provided with different.The unloading valve of this two various forms can adopt the component of different size, model, and the available flange of its plug screw (1,25) is changed.

Claims

1. T type ultrahigh pressure hydraulic unloading valve, comprise by control hydraulic oil and promote piston, piston promotion valve member and be provided with multi-layer sealed assembling to connect to form, it is characterized in that: sealing gasket by pressure pad by plug screw be pressed on the valve body, superhigh pressure sealing ring, O RunddichtringO be enclosed within on the pressure pad that studs with back-up ring and piston cylinder by flange by screw in compression on the valve body, spring is pressed on valve rod on the piston, piston, spring and valve rod are packed in the piston cylinder, on the piston that can in piston cylinder, move vertically, the valve rod master ball is housed, forms the combination of master ball and sealing gasket.

2. T type ultrahigh pressure hydraulic unloading valve according to claim 1 is characterized in that: standard and awl spring are contained in the pressure pad and by the awl spring master ball are pressed on the sealing gasket.

3. T type ultrahigh pressure hydraulic unloading valve according to claim 1 is characterized in that: plug screw is replaceable to be flange.