CN205937931U - Special ball valve of oxygen - Google Patents

Abstract

The utility model discloses a special ball valve of oxygen, including the main valve body, deputy valve body, spheroid, disk seat, valve rod, low combined packing and the handle of leaking, the main valve body and deputy valve body's flange joint department is equipped with metal O type sealing washer, be equipped with the aperture on the inner wall of metal O type sealing washer, the disk seat comprises upper reaches disk seat and low reaches disk seat, be equipped with belleville spring group between low reaches disk seat and the deputy valve body, the valve rod is equipped with the circular bead on being close to the lateral surface of bottom, after on the spheroid is installed to the valve rod, the circular bead block is on the internal wall of main valve. The utility model discloses simple structure, good, the long service life of leakproofness.

Description

Special ball valve for oxygen

Technical field

The utility model is related to a kind of ball valve, particularly to Special ball valve for oxygen.

Background technology

Oxygen ball valve is widely used in the industries such as various Coal Chemical Industries, petrochemical industry, iron and steel, metallurgy, space division.Operating mode residing for it belongs to easily Combustion, explosive environments, any leakage and interior leakage are all likely to result in burning, blast, and product quality is related to life and the environment peace of people Entirely；The gasification furnace combustion pressure of such as coal gasifying process is 4.0～8.4MPa, and 1100～1600 DEG C of temperature, is a high temperature High-pressure combustion tank, is the device of highly dangerous.Oxygen as one of the gasifying agent of coal gasifying process and raw material, oxygen purity >= 99%, due to the special physical property of oxygen, oxygen channel is one of crucial pipeline of coal gasification apparatus；Therefore to oxygen valve Sealing, the reliability of action all propose very high requirement.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of good seal performance, no internal leakage and external leakage, operation The low Special ball valve for oxygen of moment.

For reaching above-mentioned purpose, the technical solution of the utility model is as follows：

Special ball valve for oxygen, including main valve body, auxiliary valve body, spheroid, valve seat, valve rod, low leakage combined stuffing and handle； The flange connections of described main valve body and auxiliary valve body are provided with metal O-ring seal, and the inwall of described metal O-ring seal is provided with Aperture；Described valve seat is made up of upstream valve seat and downstream valve seat, is provided with disk spring group between described downstream valve seat and auxiliary valve body； The lateral surface near bottom for the described valve rod is provided with shoulder, and after valve rod is installed on spheroid, described shoulder is fastened on main valve body On inwall.

In an embodiment of the present utility model, described upstream valve seat and downstream valve seat are asymmetric valve seat.

In an embodiment of the present utility model, described disk spring group is superimposed setting by several disk spring pairings Composition.

In an embodiment of the present utility model, described disk spring is made up of nickel-base alloy.

In an embodiment of the present utility model, described low leakage combined stuffing is entered by gland and hold-down grid Row is installed.

In an embodiment of the present utility model, described low leakage combined stuffing by upper and lower two braiding end ring and It is arranged on five cup-and-cone shape graphite annulus compositions between upper and lower two braiding end ring.

In an embodiment of the present utility model, by recessed adaptation ring, convex adaptation ring in described five cup-and-cone shape graphite annulus And three sealing rings form, described concave, convex adaptation ring is setting up and down, and three sealing rings are arranged between concave, convex adaptation ring.

In an embodiment of the present utility model, described concave, convex adaptation ring is to be molded into the high density ring at 30 ° of angles, institute Stating three sealing rings is the low density annulus being molded into 45° angle.

In an embodiment of the present utility model, between described shoulder and main valve body inwall, it is provided with anti-wear gasket.

By technique scheme, the beneficial effects of the utility model are：

The utility model structure is simple, good seal performance, no internal leakage and external leakage, operational torque are low, long service life.

Brief description

In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art, below will be to embodiment Or in description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, drawings in the following description are only It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise not paying creative work Under, other accompanying drawings can also be obtained according to these accompanying drawings.

Fig. 1 is the utility model structural representation；

Enlarged drawing when Fig. 2 installs for the utility model O-ring seal；

Fig. 3 is the utility model part-structure schematic diagram；

Fig. 4 is the utility model low leakage combined stuffing structural representation；

Corresponding component title represented by figure numeral and letter：

10th, main valve body 20, auxiliary valve body 30, spheroid 40, valve rod 41, shoulder 42, anti-wear gasket 50, low leakage combination are filled out Material 51, braiding end ring 52, graphite annulus 60, handle 70, metal O-ring seal 80, upstream valve seat 90, downstream valve seat 100th, disk spring group 110, gland 120, hold-down grid.

Specific embodiment

In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under Face combines and is specifically illustrating, and the utility model is expanded on further.

Referring to shown in Fig. 1 to Fig. 4, the utility model discloses Special ball valve for oxygen, including main valve body 10, auxiliary valve body 20, Spheroid 30, valve seat, valve rod 40, low leakage combined stuffing 50 and handle 60；The utility model valve body adopts main valve body, auxiliary valve body Two-piece type designs, and decreases valve leakage out of steam system point, improves valve overall performance, main valve body and auxiliary valve body, all using forging, overcome Foundry goods inherent shortcoming (as pore, slag inclusion, loose etc.), its material compactness preferably, improves mechanical strength.

The flange connections of main valve body 10 and auxiliary valve body 20 are provided with metal O-ring seal 70, and flange is bolted, and carry For sealing initial pretightning force, the inwall of metal O-ring seal 70 is provided with aperture, and it is O-shaped that pressure medium enters metal by aperture So that its internal pressure is increased with pressure medium and increase in sealing ring, realize self-tightening sealing it is ensured that no outward leakage at this, simultaneously Decrease the possibility that metal O-ring seal is crushed；This structure can achieve the quantitation compression of flange seal part, thus keeping away Exempt from the decrement of common spirotallic gasket to become with the change of external condition (packing of pad, act on the plus load of flange) Obtain unstable.

Spheroid 30 and the special superpressed process of valve base surface, improve its wearability, and the hardening of supersonic speed/surfacing remelting processing applies Layer has the attachment degree of higher degree, can effectively prevent abrasion from causing coating shedding, the runner bore edges Passivation Treatment of spheroid, make gold Metal surface is difficult oxidized it is ensured that hardened layer will not rupture.

Valve seat is made up of upstream valve seat 80 and downstream valve seat 90, and upstream valve seat 80 and downstream valve seat 90 are asymmetric valve seat, It is provided with disk spring group 100, under low pressure, by the pretightning force of disk spring group 100 between downstream valve seat 80 and auxiliary valve body 20 Realize sealing with the pressure of medium, under high pressure outlet side seal is realized by the pressure of medium；Disk spring group 100 is by some Individual disk spring pairing superposition setting composition, disk spring is made up of nickel-base alloy, and its thrust-neutral, rigidity are big, material corrosion resistant Erosion is good with oxygen compatibility by force, and the superposition setting of disk spring pairing provides bigger spring deflection, goes to make up mismachining tolerance The sealing surface wear causing after using with long-time HTHP is it is ensured that spheroid and sealing surface are identical all the time；Downstream valve seat Sealing surface pairing with valve body is ground, and guarantees sealing surface No leakage under pressure medium.

The lateral surface near bottom for the valve rod 40 is provided with shoulder 41, and after valve rod 40 is installed on spheroid 30, shoulder 41 blocks It is combined on main valve body 10 inwall, the anti-valve rod that is provided for of shoulder 41 blows out, and when abnormal boosting in valve pocket body, valve rod will not spray Go out, packing seal can be changed online；It is provided with anti-wear gasket 42 between shoulder 41 and main valve body 10 inwall, the primary at valve rod can be formed Sealing, avoids the gathering of electrostatic, polishing after anti-wear gasket Surface hardened layer while reducing friction, effectively reduces valve behaviour Make moment of torsion.

Low leakage combined stuffing 50 passes through gland 110 and hold-down grid 120 is installed, low leakage combined stuffing 50 By upper and lower two braiding end ring 51 and five cup-and-cone shape graphite annulus 52 being arranged between upper and lower two braiding end ring form, Play anti-graphite extrusion, wipe valve rod and increase rebound effect；In five cup-and-cone shape graphite annulus by recessed adaptation ring, convex adaptation ring with And three sealing rings form, concave, convex adaptation ring is setting up and down, and three sealing rings are arranged between concave, convex adaptation ring；Concave, convex is fitted Joining ring is the high density ring being molded into 30 ° of angles, and three sealing rings are the low density annulus being molded into 45° angle；Above-mentioned angle and density Graphite annulus make combined stuffing have brilliance being radially expanded property and sealing property it is ensured that valve rod with low leakage combined stuffing, Low leakage combined stuffing and stuffing-box no external leakage.

Of the present utility model general principle and principal character and of the present utility model advantage have been shown and described above.One's own profession The technical staff of industry it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification Principle of the present utility model is simply described, on the premise of without departing from the utility model spirit and scope, the utility model is also Have various changes and modifications, these changes and improvements both fall within the range of claimed the utility model.The utility model Claimed scope is by appending claims and its equivalent thereof.

Claims (9)

1. Special ball valve for oxygen, including main valve body, auxiliary valve body, spheroid, valve seat, valve rod, low leakage combined stuffing and handle；Its It is characterised by, the flange connections of described main valve body and auxiliary valve body are provided with metal O-ring seal, described metal O-ring seal Inwall is provided with aperture；Described valve seat is made up of upstream valve seat and downstream valve seat, is provided between described downstream valve seat and auxiliary valve body Disk spring group；The lateral surface near bottom for the described valve rod is provided with shoulder, after valve rod is installed on spheroid, described shoulder card It is combined on main valve body inwall.

2. Special ball valve for oxygen according to claim 1 is it is characterised in that described upstream valve seat and downstream valve seat are non-right Claim valve seat.

3. Special ball valve for oxygen according to claim 1 is it is characterised in that described disk spring group is by several dish-shaped bullets Spring pairing superposition setting composition.

4. Special ball valve for oxygen according to claim 3 is it is characterised in that described disk spring is made up of nickel-base alloy.

5. Special ball valve for oxygen according to claim 1 is it is characterised in that described low leakage combined stuffing passes through filler pressure Lid and hold-down grid are installed.

6. Special ball valve for oxygen according to claim 5 is it is characterised in that described low leakage combined stuffing is by upper and lower two Individual braiding end ring and five cup-and-cone shape graphite annulus being arranged between upper and lower two braiding end ring form.

7. Special ball valve for oxygen according to claim 6 is it is characterised in that fitted by recessed in described five cup-and-cone shape graphite annulus Join ring, convex adaptation ring and three sealing ring compositions, described concave, convex adaptation ring is setting up and down, and three sealing rings are arranged on concave, convex Between adaptation ring.

8. Special ball valve for oxygen according to claim 7 is it is characterised in that described concave, convex adaptation ring is to be molded into 30 ° of angles High density ring, described three sealing rings are the low density annulus being molded into 45° angle.

9. Special ball valve for oxygen according to claim 1 is it is characterised in that be provided between described shoulder and main valve body inwall Anti-wear gasket.