CN2249755Y

CN2249755Y - Sealing valve mechanism of top of blast furnace

Info

Publication number: CN2249755Y
Application number: CN 95241038
Authority: CN
Inventors: 吴华松; 汤金龙
Original assignee: MAANSHAN IRON AND STEEL DESIGN
Current assignee: MAANSHAN IRON AND STEEL DESIGN
Priority date: 1995-12-13
Filing date: 1995-12-13
Publication date: 1997-03-19
Anticipated expiration: 2005-12-13

Abstract

The utility model discloses a sealing valve device used for a blast furnace bellless furnace roof. A sealing seat of the utility model uses a single-ring sealing seat (7), and is connected with a valve seat (3) through a screw bolt. The cross section of a sealing washer (8) is trapezoidal, and a clamping collar (9) is pressed at one side of the sealing washer (8). The contact surface of the bottom of the valve seat (3) and the upper part of a valve seat (6) is additionally provided with hard seal with a spherical surface. A hydraulic gear uses a single hydraulic cylinder to transmit. The sealing washer (8) of the utility model and the single-ring sealing seat (7) are easy to disassemble and change. The service life of the sealing washer (8) can be extended. The utility model has the advantages of simple structure, easy manufacture, and easy installation.

Description

Blast furnace bell-less boiler roof sealing valvegear

The utility model relates to a kind of sealing valve unit that is used for the blast furnace bell-less furnace roof, the especially sealing valve unit of being made up of valve seat, sealing socket, sealing-ring, valve plate etc.

Blast furnace adopts no bell furnace roof equipment to have the more than ten years at home, and sealing valve unit is in the no bell top construction one a very important components, and can it is directly connected to blast furnace realize high top pressure operation.The overwhelming majority all adopts the no bell furnace roof technology of Lu Sen fort PW company both at home and abroad at present, the constructional feature of its seal valve is: adopt the dicyclo soft seal, dicyclo sealing socket and valve seat are an integral body, the dismounting difficulty, the sealing-ring section is a convex, and difficulty is changed in sealing-ring and dicyclo sealing socket wearing and tearing back; And sealing socket adopts the formed space of dicyclo (claiming bimodal) little, and dust easily bonding is difficult for purging, and sealing-ring is under the working conditions of the many dirt of high temperature like this, also to bear bigger seal pressure, so be easy to wearing and tearing and fracture, about the life-span Only Six Months, and the cost of sealing-ring is higher.The transmission rig of sealing valve adopts two hydro-cylinder transmissions in addition, and complex structure is made and the installation requirement height.

The purpose of this utility model provides a kind of being easy to and changes long service life, the sealing valve unit of blast furnace bell-less furnace roof simple in structure.

For achieving the above object, sealing valve unit of the present utility model is made up of valve seat, sealing socket, sealing-ring, pressure ring, valve plate and hydraulic gear, pressure ring and valve plate Bolt Connection, its structural feature is: sealing socket adopts the monocycle sealing socket, and with the valve seat Bolt Connection, the section of sealing-ring is trapezoidal, and a side of a pressure ring Contact Seal ring is pressed on it on valve plate; The valve seat bottom contacts with valve plate top, and pile-up welding hard alloy is processed into sphere on its surface in contact, forms sphere and seals firmly; Hydraulic gear adopts the single hydraulic cylinder transmission.

Single hydraulic gear adopts the simply supported beam main shaft, and this main shaft is provided with the trailing arm that rotates with the axis, trailing arm and valve plate spherical head Bolt Connection with two bearing block supports in the middle of the main shaft.

After adopting such structure, because the monocycle sealing socket connects with valve seat with bolt, the sealing-ring section is trapezoidal, and pressure ring only compresses a side of sealing-ring, so sealing socket and sealing-ring are easy to dismounting, changes easily; Seal firmly owing to having set up sphere with the contact position on valve plate top again in the valve seat bottom, the hard sealing of this sphere can be born bigger specific pressure, the specific pressure that sealing-ring bore has just reduced, and adopt the monocycle sealing socket, formed space is big, and dust is easy to cleaning, and sealing-ring is worked under clean environment like this, the specific pressure of being born is again little, and improved the work-ing life of sealing-ring greatly; Hydraulic gear has adopted the single hydraulic cylinder transmission in addition, and is simple in structure, makes easy for installation.

Below in conjunction with the drawings and specific embodiments the utility model is done further detailed and explanation.

Fig. 1 is the outside view of the utility model sealing valve unit;

Fig. 2 is the vertical view of sealing valve unit shown in Figure 1;

Fig. 3 is the sectional view of sealing valve unit shown in Figure 1;

Fig. 4 is an A shown in Figure 3 portion enlarged view.

Fig. 1 and sealing valve unit shown in Figure 3 are made up of parts such as single hydraulic cylinder 1, valve seat 3, monocycle sealing socket 7, sealing-ring 8, pressure ring 9 and valve plates 6.Valve seat 3 is used Bolt Connection with monocycle sealing socket 7, and the section of sealing-ring 8 is trapezoidal, and pressure ring 9 usefulness bolts connect with valve plate 6, and near a side of sealing-ring 8 it are pressed on the valve plate 6; Valve seat 3 bottoms contact with the top of valve plate 6, and pile-up welding hard alloy is processed into sphere on its surface in contact, forms sphere and seals firmly, and this sphere seals firmly and can bear bigger specific pressure, reduced the specific pressure that sealing-ring 8 is born, the work-ing life of having improved sealing-ring 8 greatly.Between monocycle sealing socket 7, valve seat 3 and valve plate 8, feed nitrogen in the formed cavity, purge dust, can keep the cleaning of sealing face.

Simply supported beam main shaft 10, two bearing block supports of main shaft 10 usefulness are adopted in single hydraulic cylinder 1 transmission; Be provided with the trailing arm 4 that rotates with the axis in the middle of main shaft 10, trailing arm 4 connects with valve plate 6 usefulness spherical head bolts 5.

The sealing valvegear is in seal process, and hydro-cylinder 1 drives crank 2 and rotates, and drives main shaft 10 rotations that are installed on the diaxon bearing, valve plate 6 is closed in trailing arm 4 motions meanwhile, sealing-ring 8 contacts with monocycle sealing socket 7, and valve plate 6 contacts with valve seat 3, has finished sealing.In valve plate 6 and valve seat 3 contact processes, valve plate 6 can be around 5 swings of spherical head bolt, to improve sealed precision.

Claims

1. sealing valve unit that is used for the blast furnace bell-less furnace roof, form by valve seat, sealing socket, sealing-ring, pressure ring, valve plate and hydro-cylinder transmission rig, pressure ring is connected with bolt with valve plate, it is characterized in that: used sealing socket adopts monocycle sealing socket (7), and use Bolt Connection with valve seat (3), the section of sealing-ring (8) is trapezoidal, and a side of pressure ring (a 9) Contact Seal ring (8) is pressed on it on valve plate (4); Said valve seat (3) bottom contacts with valve plate (6) top, and pile-up welding hard alloy is processed into sphere on its surface in contact, forms sphere and seals firmly; Said hydraulic gear adopts single hydraulic cylinder (1) transmission.

2. sealing valve unit according to claim 1 is characterized in that described single hydraulic cylinder (1) transmission adopts simply supported beam main shaft (10), and this main shaft (10) is with two bearing block supports; Be provided with the trailing arm (4) that rotates with the axis in the middle of the main shaft (10), trailing arm (4) connects with spherical head bolt (5) with valve plate (6).