CN201206632Y

CN201206632Y - Seal dump valve of electrohydraulic push rod

Info

Publication number: CN201206632Y
Application number: CNU2008200586215U
Authority: CN
Inventors: 叶林; 周荣生; 易钢; 陈煜�
Original assignee: Baoshan Iron and Steel Co Ltd
Current assignee: Baoshan Iron and Steel Co Ltd
Priority date: 2008-05-19
Filing date: 2008-05-19
Publication date: 2009-03-11
Anticipated expiration: 2018-05-19

Abstract

The utility model discloses an electrohydraulic push rod seal cinder valve including an electrohydraulic push rod, a crank connecting rod, a spherical valve cap, a seal ring, a seal ring positioning seat and a valve seat. One end of the crank connecting rod is fixed on the valve seat through a rotating shaft; the seal ring is mounted in the seal ring positioning seat; and the seal ring positioning seat is fixed on the valve seat through bolts. The electrohydraulic push rod seal cinder valve can automatically clean dust on a seal surface, thereby improving the reliability and the stability of the seal.

Description

Electrohydraulic push rod sealing unloading valve

Technical field

The utility model relates to the gas cooler of the concise system of a kind of vacuum outgas, the Electrohydraulic push rod sealing unloading valve of the gas cooler of the concise system of particularly a kind of vacuum outgas.

Background technique

Vacuum outgas is concise to be the important means of external refining, mainly be to utilize the vacuum principle molten steel to be carried out secondary smelting such as decarburization, dehydrogenation, the a large amount of high-temperature flue gas that produce in vacuum tank during smelting enter gas cooler through the hot bending pipe and once cool off, realize first gas ash content from: dust gathers in the gas cooler bottom, discharges by the cinder-discharging port of gas cooler bottom is regularly artificial; Remaining gas enters vacuum pump system and continues cooling and purification.Because gas cooler is a constituent element of vacuum system, therefore the sealability of ash-removing mouth is required very highly, there is leakage just can cause very big influence slightly to degree of vacuum and relevant device and even the concise normal smelting of vacuum outgas.

Fig. 1 is the schematic representation of gas cooler unloading valve of the concise system of vacuum outgas of prior art, mainly is made up of cylinder 1, connecting rod 2, valve gap 3, O RunddichtringO 4, valve seat 5.Cylinder 1 is by being bolted on the gas cooler cinder-discharging port 6, the piston rod of cylinder 1 is connected with an end of connecting rod 2 by coupling pin, the other end of connecting rod 2 is fixed on the valve gap 3, the middle part of connecting rod 2 is fixed on the valve seat 5 by rotating shaft, and valve seat 5 combines as a whole by the cinder-discharging port 6 of flange and gas cooler.Be provided with O RunddichtringO 4 between valve seat 5 and the valve gap 3, seal by the positive-pressure type plane contact of 4 pairs of valve seats of O RunddichtringO 5 with valve gap 3.When unloading ash, cylinder 1 piston rod retraction, drivening rod 2 turn clockwise around rotating shaft, and valve gap 3 is opened; Unload ash and finish, cylinder 1 piston rod is released, and drivening rod 2 is rotated counterclockwise around rotating shaft, and valve gap 3 compresses with valve seat 5, seals by O RunddichtringO 4.

Because what the cinder-discharging port of gas cooler 6 ejected is water ash mixture, and the discharging frequency is higher, about about 1 hour 1 time, so wet ash often is bonded on the sealing surface and O RunddichtringO 4 of face-flange of unloading valve valve seat 5, adding upper valve base 5 contacts for the line style positive-pressure type with O RunddichtringO 4, can't clear up the dust that bonds on the sealing surface voluntarily, thereby can't guarantee the area of contact that seals, cause seal failure, therefore, after putting ash, all must carry out the labor cleaning of sealing station at every turn, because every smelting one heat steel water promptly need be put ash once, so, every day clearing times more than 20 times, cleaning frequency height, difficulty is big.The impacting force that adds upper cylinder is less, sealing reliability is relatively poor, cause sealing unloading valve leaks fault occurrence frequency every year up to 50 times about, cause degree of vacuum decline, processing initial stage to arrive target vacuum and spent catastrophe failures such as time length, the inordinate wear of vacuum pump mixing chamber body, diffuser dust stratification are serious, influenced concise quality and the output of vacuum outgas greatly.

Summary of the invention

For addressing the above problem, the utility model provides a kind of Electrohydraulic push rod sealing unloading valve, guarantees the reliability of unloading valve sealing.

For achieving the above object, Electrohydraulic push rod sealing unloading valve of the present utility model comprises: Electrohydraulic push rod, crank-connecting rod, spherical valve gap, seal ring, seal ring positioning seat and valve seat; One end of described crank-connecting rod links to each other with the piston rod of described Electrohydraulic push rod, and the other end links to each other with described spherical valve gap, and the middle part of described crank-connecting rod is fixed on the described valve seat by rotating shaft; Described seal ring is installed in the described seal ring positioning seat, described seal ring positioning seat by screw on described valve seat.

Described seal ring is a silicone rubber O-ring.

Electrohydraulic push rod of the present utility model seals unloading valve, can clear up the dust of sealing surface automatically, has improved the reliability and stability of sealing.

Description of drawings

Fig. 1 is the schematic representation of gas cooler unloading valve of the concise system of vacuum outgas of prior art;

Fig. 2 is the working state schematic representation of Electrohydraulic push rod sealing unloading valve of the present utility model;

Fig. 3 is the valve gap open mode schematic representation of Electrohydraulic push rod sealing unloading valve of the present utility model.

Embodiment

Fig. 2 is the working state schematic representation of Electrohydraulic push rod sealing unloading valve of the present utility model, and Fig. 3 is the valve gap open mode schematic representation of Electrohydraulic push rod sealing unloading valve of the present utility model.As shown in the figure, Electrohydraulic push rod sealing unloading valve of the present utility model comprises: Electrohydraulic push rod 100, crank-connecting rod 200, spherical valve gap 300, seal ring 400, seal ring positioning seat 401 and valve seat 500.

Valve seat 500 links to each other with the cinder-discharging port 600 of gas cooler, and valve seat 500 is fixed on the cinder-discharging port 600.

Electrohydraulic push rod 100 is a kind of mechanical, electrical, liquid integrated flexible driving mechanisms, the working principle of Electrohydraulic push rod 100 is for being power source with the motor, by motor just (or anti-) to rotation, make hydraulic oil through the double-direction gearpump pressure oil output, through the oil circuit integrated package, deliver to operating cylinder, realize the to-and-fro motion of piston rod 101.It has, and implementation capacity is big, working state is steady and have stronger advantages such as pressure holding function, can guarantee sealing effect, thereby has improved the reliability and stability of sealing greatly.The working principle of Electrohydraulic push rod 100 and structure are prior art, are not giving unnecessary details here.

One end of described crank-connecting rod 200 links to each other with the piston rod 101 of Electrohydraulic push rod 100, and the other end links to each other with described spherical valve gap 300, and the middle part of described crank-connecting rod 200 is fixed on the valve seat 500 by rotating shaft.

Described seal ring 400 is installed in the described seal ring positioning seat 401, described seal ring positioning seat 401 by screw on valve seat 500.Described seal ring 400 can adopt silicone rubber O-ring, and it has high elasticity, aging-resistant advantage.

The sealed working face of Electrohydraulic push rod sealing unloading valve of the present utility model is the inner ring of seal ring 400, the sphere contact seal of the inner ring of seal ring 400 and spherical valve gap 300, thus increased effective area of contact, improved the reliability and the validity of sealing.When closing spherical valve gap 300, if there is low amounts of dust to be deposited in the inner ring of seal ring 400 and the sphere of spherical valve gap 300,, dust can be pushed away away by spherical valve gap 300 crush seal circle 400 gradually, play from clear function, guarantee sealing effect.

As shown in Figure 2, when needs unloaded ash, Electrohydraulic push rod 100 was connected power supplys to Electrohydraulic push rod of the present utility model sealing unloading valve, made piston rod 101 withdrawals in working order the time, and pulling crank-connecting rod 200 is opened spherical valve gap 300, as described in Figure 3; Unload ash and finish, stretch out piston rod 101 by Electrohydraulic push rod 100 again, throw crank connecting rod 200 is closed spherical valve gap 300, gets back to state shown in Figure 2.

Claims

1, a kind of Electrohydraulic push rod sealing unloading valve is characterized in that, comprising: Electrohydraulic push rod, crank-connecting rod, spherical valve gap, seal ring, seal ring positioning seat and valve seat; One end of described crank-connecting rod links to each other with the piston rod of described Electrohydraulic push rod, and the other end links to each other with described spherical valve gap, and the middle part of described crank-connecting rod is fixed on the described valve seat by rotating shaft; Described seal ring is installed in the described seal ring positioning seat, described seal ring positioning seat by screw on described valve seat.

2, Electrohydraulic push rod sealing unloading valve as claimed in claim 1 is characterized in that described seal ring is a silicone rubber O-ring.