CN2216620Y

CN2216620Y - Sealing valve

Info

Publication number: CN2216620Y
Application number: CN 94215727
Authority: CN
Inventors: 肖明兴; 马铁林
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-06-27
Filing date: 1994-06-27
Publication date: 1996-01-03
Anticipated expiration: 2004-06-27

Abstract

The utility model relates to a sealing valve, which is composed of a casing body, a valve seat, a valve clack, a valve rod, and a gearing. A rotating shaft is driven by the driving device for rotation, and the top of the valve rod is fixedly connected with the rotating shaft. The valve clack rotates around the rotating shaft along with the valve rod for realizing the opening and closing of the valve. A force application mechanism conducts the pushing action on the inner inclined face of the square hole of the valve rod and generates upward force component via the cuneate slopes of the front sides of the air cylinder and the piston rod. The valve rod is hinged with the valve clack, and pressure is increased under the stress of the valve clack for tightly pressing the valve clack on a sealing surface in the form of self-locking. The utility model improves the sealing performance and solves the problem that the existing bell-shaped valve is easy to leak air. The sealing valve has the advantages of light weight, low cost, and tight sealing and is suitable for the valve using water, gas, and ash as medium and the gas sealing of the cloth bag of a blast furnace for removing dust and the ash.

Description

Auxiliary application of force seal valve

The utility model relates to the auxiliary force application mechanism of a kind of mat, to the seal valve of sealing of the flap application of force and maintenance self-locking.

The coal gas seal valve of the bag-type dust ash discharging system of blast furnace, the general use has two kinds of valves, and a kind of is bell-shaped valve, and another kind is a ball valve, and preceding its valve handle of a kind of valve and housing are difficult to sealing, leakage gas in unloading grey process.It is excessive that dust is spurting with coal gas, form secondary pollution, substituted by the latter just gradually at present, ball valve sealing is tighter, but its weight is big, cost is high, maintenance is inconvenient, and its maximum defective is: usually sticking ash between spheroid and Sealing, sealability is reduced, and block spheroid, and open and close dumbly, usually causing the maintenance of stopping using.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and provide a kind of force application mechanism, move by cylinder piston rod, the anterior wedge shape ramp effect of piston rod is in valve body on the square hole inclined-plane, compress the flap hinged with valve rod, make it be subjected to upwards component, compress the auxiliary application of force seal valve of sealing, good seal performance, in light weight, cost is low.

Auxiliary application of force seal valve is to advance on the inclined-plane of wedge shape ramp effect in valve rod left end square hole with the application of force, producing upwards, component makes sealing surface increase pressure, flap and valve rod are hinged, with the axle is that fulcrum can swing back and forth, the square place of valve rod right-hand member square opening and rotating shaft suit is fixed, so the inclined-plane is subjected to upward pressure not produce torque in the valve rod left end, and flap is pressed on the sealing surface; Auxiliary application of force seal valve, form by housing, valve seat, flap, valve rod and transmission device, valve seat is welded on the valve gap, flap and valve rod are hinged, and flap is a round iron plate, two triangle support plates of its center line symmetry welding, valve rod is housed therebetween to be hinged mutually with axle, valve rod is the rectangular hollow body that iron plate is welded into, and its right-hand member has square opening to fixedly connected with rotating shaft, and there is the inclined-plane the rectangular hollow body of the other end inboard; Auxiliary force application mechanism moves by the air cylinder driven piston rod, the piston rod front portion is the wedge shape inclined-plane, and progradation makes it produce upwards component on the inboard inclined-plane of valve rod square hole, compress flap and keep self-locking, the sphenoid surface angle can keep self-locking for 15 ° less than its friction angle; The ratch of the cylinder piston rod front end of transmission device, push-and-pull gear driven rotating shaft revolution, and flap is rotated around the axis with valve rod, realize the opening and closing of valve, the rotating shaft angle of revolution of opening and closing is 90 °, is to be controlled by the collision block and the position limit switch of rotating shaft right-hand member dress; After valve cut out, auxiliary force application mechanism adopted the pneumatic drive piston to move back and forth, and advanced the wedge shape inclined-plane to make sealing surface in conjunction with closely, also can use instead electronic, other driving mode such as surge is for referencial use.

Advantageous effect and purposes:

1, rotating shaft and housing have reliable sealing

2, flap and valve rod are hinged, keep flap to contact well with sealing surface after the application of force.

3, under the effect of auxiliary force application mechanism, sealing surface pressure increases, and sealability improves, and can keep self-locking.

4, simple in structure, in light weight, reliable in action, easy to maintenance, cost is low, have only about half of ball valve cost, the weight ratio ball valve reduces 3/4, be fit to do water, gas, ash for the valve of medium uses, be specially adapted to the coal gas sealing of furnace cloth bag dust-removing ash discharging system.

The drawing explanation of accompanying drawing:

Fig. 1, auxiliary application of force seal valve combination partial sectional view

Fig. 2, auxiliary application of force seal valve Figure 1A-A sectional view

Fig. 3, auxiliary application of force seal valve Fig. 2 D are to view

Fig. 4, auxiliary application of force seal valve Figure 1B-B sectional view

Fig. 5, auxiliary application of force seal valve Fig. 1 C-C sectional view

Embodiment of the present utility model is described in further detail in conjunction with the accompanying drawings:

See Fig. 1, this seal valve combination partial sectional view, the upper flanges face and the cover-use screw of housing (10) are fastening, and be equipped with and repair trepanning (9) and add a cover dustproof, the cylinder of its right side transmission device (8), drive rotating shaft (6) and rotate, downside is equipped with cylinder (1) and is in same position of center line with valve rod (3).

Fig. 2 is Figure 1A-A section, the left half 90 ° of views that upwards overturn, valve seat (4) and valve gap welding, valve gap is connected with bolton with the flanged surface of housing (10), be convenient to loading and unloading and change Sealing, unclamp bolt earlier valve seat is mentioned, needn't unload valve and just can on-the-spotly repair fast; Valve seat and flap are used the seal ring plane sealing between (5), seal ring is fixed in the valve seat circular groove, cylinder (1) is positioned at the left side, its piston rod front end has the inboard inclined-plane of wedge shape inclined-plane (2) propelling and valve rod (3) square hole to contact, and produces upwards component, makes sealing surface compact, valve rod and flap (5) are hinged, valve rod right-hand member square hole is sleeved on the square place of rotating shaft (6), and rotating shaft is rotated with the hinged valve rod of flap, and the housing right side has repairing trepanning (9) to be convenient to deashing and maintenance.

Fig. 3 be the D of Fig. 2 to view, flap (5) bottom center line symmetry both sides are welded with a diabolo support plate, the center is porose, and valve rod (3) is housed between support plate, its corresponding positions is equipped with through hole, in the hinge load hole, as hinged support.

Fig. 4 is Figure 1B-B sectional view, cylinder (1) piston rod front is wedge shape inclined-plane (2), advance with the inboard inclined-plane of the rectangular hollow body of valve rod (3) and contact, their bevel angle is identical, all less than 15 °, the sphenoid surface front end also have one with tilt 45 ° inclined-plane of center line, in order to the flexibility that advances action.

Fig. 5 is Fig. 1 C-C sectional view, has tooth bar on the piston rod of transmission device cylinder (8), tooth bar moving belt moving gear (7) and rotating shaft (6) revolution, and valve rod (3) is rotated around the axis; Position limit switch (11) is contained in the outside, the gear cover right side, when throttle down, press the switch button of dynamic air cylinder (8), the selector valve outage of cylinder (8), pressurized air makes cylinder piston rod promote gear driven rotating shaft revolution and makes valve rod and flap rotation, throttle down behind the pass, is contained in the collision block of rotating shaft right-hand member, touch position limit switch (11), make the selector valve outage of cylinder (1), pressurized air promotes cylinder (1) piston rod wedge shape inclined-plane (2) reach, makes flap compress sealing surface; When unloading ash, by releasing the button of dynamic air cylinder (1), the selector valve of cylinder (1) is charged, pressurized gas promotes to move after cylinder (1) piston makes sphenoid surface (2), releasing the button of cylinder (1) makes the selector valve time-delay of cylinder (8) charged by time delay relay, under the effect of pressurized gas, the pulling gear makes valve opening; It is not shown that each switch button, time delay relay and selector valve all are contained in the last figure of dish.

Claims

1, auxiliary application of force seal valve is made up of housing, valve seat, flap, valve rod and transmission device, and valve seat (4) is welded on the valve gap, it is characterized in that:

A, flap (5) and valve rod (3) are hinged, flap is a round iron plate, its center line symmetry is welded with two triangle support plates, valve rod is housed therebetween to be hinged mutually with axle, valve rod is the rectangular hollow body that iron plate is welded into, its right-hand member has square opening to fixedly connected with rotating shaft (6), and there is the inclined-plane the rectangular hollow body of the other end inboard.

B, auxiliary force application mechanism move by cylinder (1) piston rod, and the piston rod front portion is wedge shape inclined-plane (2), and progradation makes it produce upwards component on the inboard inclined-plane of valve rod square hole, compresses flap and keeps self-locking;

The ratch of the cylinder of c, transmission device (8) piston rod front end, push-and-pull gear (7) drives rotating shaft (6) revolution, and flap (5) is rotated around the axis with valve rod (3), realizes the opening and closing of valve.

2, auxiliary application of force seal valve according to claim 1 is characterized in that: use the seal ring plane sealing between valve seat (4) and flap (5), seal ring is fixed in the valve seat circular groove.

3, auxiliary application of force seal valve according to claim 1, it is characterized in that: the wedge shape inclined-plane (2) of cylinder (1) piston rod front, and the inboard inclined-plane of the rectangular hollow body of valve rod (3), their bevel angle is identical, all less than 15 °, the sphenoid surface front end also have one with tilt 45 ° inclined-plane of center line.

4, according to claim 1 and 2 described auxiliary application of force seal valves, it is characterized in that: be welded with the valve gap of valve seat and the flanged surface of housing (10), connect, be convenient to loading and unloading and change Sealing with bolton.