CN201348072Y

CN201348072Y - High pressure large flow safety valve

Info

Publication number: CN201348072Y
Application number: CNU2009200105031U
Authority: CN
Inventors: 苏荣华; 彭晨宇; 何凡
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-06
Filing date: 2009-02-06
Publication date: 2009-11-18
Anticipated expiration: 2019-02-06

Abstract

The utility model relates to a high pressure large flow safety valve belonging to the safety valve for the mine production equipment, comprising a valve block housing, an inlet joint, an outlet joint, a pressure control spring, a circlip, a filter screen and seal rings. A hollow link rod is installed in the center of the valve block housing chamber. The left end of the hollow link rod is in screw connection with a step-shaped slide valve body with a conical surface. Four safe overflow holes are circumferentially arranged on the conical surface of the slide valve body with equal distance. A collision prevention spring is axially mounted in the groove in the shoulder left inlet joint. A collision prevention spring is installed in the safe valve for cushioning the collision between the parts in the safe valve. The collided seal adaptor is made of the nylon materials with lower hardness, thus relieving the libration. The slide valve body has small effective and safe unloading moving distance and ensures the instant unloading of the hydraulic support when the top board presses suddenly.

Description

The high-pressure high-flow safety valve

Technical field

The utility model belongs to mine manufacturing mechanism safety valve, particularly a kind of high-pressure high-flow safety valve.

Background technique

At present, the used flow that safety valve carried of Coal Production equipment hydraulic support is little, when flow during less than 100L/min operation more stable, but when top board was pressed suddenly, the Chang Yinqi carrying was excessive, makes device damage and can not unload moment.When the safety valve flow increases, the valve body vibration can appear, and operation is unstable, problems such as seal life is low, in order to address these problems, people are often from reducing spring vibration, and ignore owing to the bump between the caused valve inner part of spring vibration, reduce the working life of safety valve.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned technical deficiency, provides a kind of and can alleviate vibration, bears high pressure, the high-pressure high-flow safety valve of long service life.

The technological scheme that the utility model technical solution problem adopts is: the high-pressure high-flow safety valve comprises valve group housing, inlet attack, outlet connection, pressure-controling spring, jump ring, filter screen, seal ring, be characterized in that a hollow connecting rod is adorned at the center in valve group housing chamber, hollow connecting rod left end head thread connects the stepped shaft slide valve of a band conical surface, circumferential all apart from establishing four safe overflow holes on the slide valve conical surface, in the inlet attack inner groovy of shoulder left side crashproof spring is housed axially, crashproof spring is equipped with the sealing that contacts with the conical surface of slide valve outward accepts piece, debugs at hollow connecting rod right-hand member headgear and presses screwed plug to be connected with valve group housing right-hand member internal diameter whorl.

The beneficial effects of the utility model are: crashproof spring is installed, the bump between can baffle safety valve inner body in the safety valve; The sealing of being clashed into is accepted piece and is selected the lower nylon material of hardness for use, can alleviate vibration; Slide valve is designed to hollow tubular structure, has both increased the big flow of area of passage assurance safety valve, has reduced bearing area again and has not increased pressure-controling spring load, and while and pressure regulation screwed plug internal cavity, hollow connecting rod and differential slide block form differential circuit; Utilize differential circuit to increase forward velocity, reduce the characteristics of bearing load, reduce spring rate and guarantee that safety valve bears high pressure thereby reduce the pressure-controling spring load; Valve seals is contained on the slide valve male cone (strobilus masculinus), and is not parallel with the moving direction of slide valve because of the conical surface, increased the working life of valve seals; Slide valve effective and safe off-load displacement distance is little, guarantees hydraulic support moment unloading when top board is pressed suddenly.

Description of drawings

Specify with embodiment below in conjunction with accompanying drawing.

Fig. 1 is that high-pressure high-flow safety valve structure master looks sectional view.

Among the figure, the 1-inlet attack; The 2-slide valve; The crashproof spring of 3-; Piece is accepted in the 4-sealing; The 5-outlet connection; The 6-pressure-controling spring; 7-valve assembly housing; The 8-hollow connecting rod; 9-pressure regulation screwed plug; The differential slide block of 10-; The 11-jump ring; The 12-filter screen; 13-inlet seal circle; 14-safety overflow hole; The 15-valve seals; 16-exit seal circle; 17-slide block seal ring;

Embodiment

Embodiment with reference to accompanying drawing 1, is fixed with outlet connection 5 on the left side excircle of the valve assembly housing 7 of high-pressure high-flow safety valve, and outlet connection 5 inner cavities are communicated with the inner cavity of valve assembly housing 7, and external diameter takes on mouth sealing ring 16.At the fixedly connected inlet attack 1 of the left end head of valve assembly housing 7, the inner chamber left end of inlet attack 1 is equipped with filter screen 12 and blocks loading port seal ring 13 on the external diameter with jump ring 11.Piece 4 is accepted in the sealing that the band inclined-plane is housed at the right-hand member head of inlet attack 1, adorns a stepped slide valve 2 of the hollow tubular right-hand member band conical surface in inlet attack 1 right-hand member inner chamber versatilely.In the external diameter shoulder of slide valve 2, in the inner groovy of inlet attack 1 crashproof spring 3 is housed, on the conical surface circumferentially all apart from establishing four safe overflow holes 14.Crashproof spring 3 can cushion the bump between the part in the valve body, and slide valve 2 is designed to hollow tubular and has increased area of passage, guarantees big flow.Valve seals 15 is housed on the conical surface of slide valve 2, and crashproof spring 3 outsides are adorned a sealed nylon and are accepted piece 4, and the inclined-plane of piece 4 is accepted in sealing and the conical surface of slide valve 2 is tightly connected with valve seals 15.Internal diameter right-hand member, valve group housing 7 lumen centers at slide valve 2 are adorned a hollow connecting rod 8, in hollow connecting rod 8 peripheries, the valve group housing 7 pressure-controling spring 6 is housed, pressure-controling spring 6 left ends connect slide valve 2, right-hand member connects pressure regulation screwed plug 9, and pressure regulation screwed plug 9 is connected with the right-hand member internal diameter whorl of valve assembly housing 7.In the inner chamber of pressure regulation screwed plug 9, adorn a differential slide block 10 and use 17 sealings of slide block seal ring.Differential slide block 10 and hollow connecting rod 8 external diameters clamp be connected and establish and hollow connecting rod 8 with the endoporus in footpath.The working principle of high-pressure high-flow safety valve is to be connected with pressure-controling spring 6 on slide valve 2 right sides, pressure-controling spring 6 is by pressure regulation screwed plug 9 Control work length, hollow connecting rod 8 and differential slide block 10 form differential circuit, utilize differential circuit to increase forward velocity, reduce bearing load, reduce pressure-controling spring 6 loads and the rigidity that reduces spring 6 guarantees that safety valve can bear high pressure.

Claims

1, a kind of high-pressure high-flow safety valve, comprise valve group housing (7), inlet attack (1), outlet connection (5), pressure-controling spring (6), jump ring (11), filter screen (12), seal ring (13,15,16,17), it is characterized in that a hollow connecting rod (8) is adorned at the center in valve group housing (7) chamber, hollow connecting rod (8) left end head thread connects the stepped shaft slide valve (2) of a band conical surface, circumferential all apart from establishing four safe overflow holes (14) on slide valve (2) conical surface, in inlet attack (1) inner groovy of shoulder left side crashproof spring (3) is housed axially, outside the crashproof spring (3) sealing that contacts with the conical surface of slide valve (2) is housed and accepts piece (4), debug at hollow connecting rod (8) right-hand member headgear and press screwed plug (9) to be connected with valve group housing (7) right-hand member internal diameter whorl.