CN201739626U

CN201739626U - Sealing device

Info

Publication number: CN201739626U
Application number: CN2010202981682U
Authority: CN
Inventors: 刘映泉
Original assignee: Xinxing Heavy Industry Hubei 3611 Mechanical Co Ltd
Current assignee: Xinxing Heavy Industry Hubei 3611 Mechanical Co Ltd
Priority date: 2010-08-12
Filing date: 2010-08-12
Publication date: 2011-02-09
Anticipated expiration: 2020-08-12

Abstract

A sealing device comprises a sealing sleeve, the axial section of which is of a cone-like shape. The inner cavity of the sealing sleeve includes a groove and a staircase structure of a boss. The sealing sleeve is provided with a sealing conical surface. The sealing device of the utility model can increase the effective pressure of a rubber sealed valve type hydraulic valve product to 1.6 MPa from previously 0.4 MPa in a very safe way, through which the rubber sealed valve type hydraulic valve product can work stably under high pressures. The utility model mainly ameliorates the performances of a valve type oil feeding or water feeding appliance under a pressure equal to or higher than 1.0 MPa, and effectively increases the rated operating pressure, working stability and working reliance of an appliance containing valves making linear motions; thereby, the service lifetime of the valve type oil feeding or water feeding appliance can be effectively prolonged; water valve appliances equipped with such a sealing sleeve are not prone to be damaged due to the frequent motions of a sealing pad and the rush of water, thereby, effectively preventing the waste of resources. The sealing sleeve is capable of being applied to oil feeding appliances or to water valves as well.

Description

A kind of seal arrangement

Technical field

The utility model relates to a kind of seal arrangement.

Background technique

Existing seal ring is large-diameter portion and the collar that is assemblied in valve rod, this class formation, liquid be in low pressure (≤0.4MPa) still can under the state, but liquid be in high pressure (〉=0.8MPa) under the state, the work of valve rod mechanism (containing the seal ring part) can occur following unusual: 1, the high pressure sealing test is defective; 2, Sealing is frequently impacted and is produced relative displacement, rapid wear with valve stem body; 3, cracking pressure is excessive or cause part distortion and lost efficacy, and then has influence on whole system operation.

Summary of the invention

Goal of the invention of the present utility model is exactly to provide at above-mentioned deficiency the seal arrangement of rated working pressure that a kind of effective raising contains valve utensil (the valve class of moving linearly) and stability in use, reliability.

The technical solution of the utility model is: the axial cross section of stuffing box gland is the class taper; Stuffing box gland inner chamber chamber face is the step-like structure that comprises groove, boss; Sealing cone is arranged on the stuffing box gland.

Described groove is corresponding with its valve rod shaft shoulder to be assembled, and described boss is corresponding with its valve rod axle journal to be assembled, and the top of described boss is corresponding with its big footpath of valve rod to be assembled.

The utility model can be brought up to 1.6Mpa by 0.4Mpa with effective working pressure of rubber seal valve type hydraulic valve product, and safe and reliable, makes rubber seal valve type hydraulic valve stable operation under high pressure conditions.The utility model has mainly solved the high pressure of valve type oiling (or adding water) utensil, and (〉=1.0MPa) ability to work effectively improves and contains the rated working pressure of valve utensil (the valve class of moving linearly) and stability, the reliability of use; Effectively improved the working life of valve type oiling (or adding water) utensil, avoided the water valve appliances to cause whole water valve to be scrapped, effectively avoided the wasting of resources, can be widely used in refueling utensil and water valve because of the frequent relative movement and the water impact of sealing gasket.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the dynamic duty process schematic representation of existing valve rod and seal ring.

Among the figure, 1, inner chamber, 2, boss, 3, sealing cone, 4, stuffing box gland, 5, groove, 6, valve rod, 7, seal ring.

Embodiment

Among Fig. 1, the axial cross section of stuffing box gland 4 is the class taper, and its inner chamber 1 chamber face is a step-like structure, comprises groove 5, boss 2; Sealing cone 3 is arranged on the stuffing box gland 4.Groove 5 is corresponding with its valve rod to be assembled 6 shaft shoulders, and boss 2 is corresponding with its valve rod to be assembled 6 axle journals, and the top of boss 2 is corresponding with its valve rod to be assembled 6 big footpaths.

Among Fig. 2, produce displacement behind the valve rod 6 stressed F downwards, seal ring 7 plasticity that are assemblied on the valve rod 6 are very big, and this moment, seal ring 7 still bore pressure f from hydraulic system, most of seal ring 7 can continue to be close to big valve inner seal face, like this, just produce relative displacement d between seal ring 7 and the valve rod 6, the situation that the Decompression valves system works lost efficacy occurred.

When the utility model has overcome valve rod and seal ring split assembling,, produce the deficiency of relative displacement between the two because of being subjected to the external force effect of oil pressure and opening mechanism.If the valve rod pressurized produces displacement, sealed department branch produces the interlock of same displacement.Can be with the utility model at pack into the position straight forming kiss-coating of seal ring of valve rod, be about to the utility model and be permanently secured to valve rod, the seal ring of traditional moulding is assembled to the process form of valve rod (or valve), change into caulking gum in the moulding of valve rod (or valve) certain location integral molded plastic, when valve rod work produces relative main valve (or sealing structure face) motion, hermetic unit will keep producing the interlock that acts in agreement with valve rod (or valve).

Claims

1. seal arrangement, it is characterized in that: the axial cross section of stuffing box gland (4) is the class taper; Stuffing box gland (4) inner chamber (1) chamber face is the step-like structure that comprises groove (5), boss (2); Sealing cone (3) is arranged on the stuffing box gland (4).

2. seal arrangement according to claim 1, it is characterized in that: described groove (5) is corresponding with its valve rod to be assembled (6) shaft shoulder, described boss (2) is corresponding with its valve rod to be assembled (6) axle journal, and the top of described boss (2) is corresponding with the big footpath of its valve rod to be assembled (6).