CN2746214Y - Unloading valve - Google Patents

Abstract

The utility model provides an unloading valve used in the blast furnace system of metallurgical industry. The unloading valve comprises a valve body, a valve plate, a sealing ring and a valve base. The sealing ring is installed on the valve plate. The valve base is aslant placed inside the valve body. Included angle of the plane of the valve base and the horizontal plane is a. A swinging arm is fixedly linked on the valve plate. The swinging arm is connected to the valve body through pins. The back of the valve plate is welded with connecting blocks. The connecting block is opened with a skewed slot, and a passage of straight slot is in the end of the skewed slot. The valve body is still provided with a drive device. A piston rod of the drive device is positioned at the horizontal position, and the piston rod is connected with the connecting blocks on the valve plate through the pins. The beneficial effects of the utility model are that the rotating points and the functioning points are separated, and the sealing slave is oblique plane contact. The utility model can keep long-term and reliable seal and has the advantages of simple structure and low manufacturing cost.

Description

A kind of unloading valve

Affiliated technical field

The utility model relates to a kind of valve, particularly relates to the unloading valve that a kind of metallurgy industry blast furnace system uses.

Background technique

Use the unloading valve that uses at the metallurgy industry blast furnace system at present, the general ball valve form that adopts the single valve seat, comprise valve body, valve gap, spheroid, seal ring, valve shaft, valve shaft drives valve shaft, and the drive spheroid revolves and turn 90 degrees, and realizes opening and closing, because seal ring and spheroid are in the sealing contact condition always, seal ring is easy to wear, causes leakage, causes valve invalidation.

Summary of the invention

Easy to wear in order to overcome existing unloading valve seal ring, cause leakage, cause the deficiency of valve invalidation, the utility model provides a kind of unloading valve of good sealing effect.

The technological scheme that its technical problem that solves the utility model adopts is a kind of unloading valve, comprise valve body, valve plate, seal ring, valve seat, seal ring is installed on the valve plate, valve seat is inclined in the valve body, and valve seat planes and horizontal plane angle are a, and swing arm has been fixedly connected on the valve plate, swing arm is connected on the valve body by bearing pin, back at valve plate is welded with contiguous block, has skewed slot on the contiguous block, at the not end of skewed slot one section straight trough is arranged; Drive unit also is housed on valve body, and the piston rod of drive unit is horizontal, and piston rod is connected by pin with contiguous block on the valve plate.

Valve seat planes and horizontal plane angle a are preferably 10 to 20 degree.

The beneficial effects of the utility model are that sealing pair is a plane contact because turning point separates with point of action, can keep sealing reliably and with long-term, and are simple in structure, low cost of manufacture.

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is embodiment's a tectonic maps.

Among the figure: 1. valve body; 2. bearing pin; 3 valve seats; 4. seal ring; 5. sell; 6. contiguous block; 7 valve plates; 8. swing arm; 9. piston rod; 10. drive unit.

Embodiment

As shown in Figure 1, a kind of unloading valve comprises valve body 1, valve plate 7, seal ring 4, valve seat 3, and seal ring 4 is installed on the valve plate 7, and valve seat 3 is inclined in the valve body 1, and valve seat 3 planes and horizontal plane angle are a, and seal ring 4 contacts for the inclined-plane with valve seat 3; The swing arm 8 that has been fixedly connected on the valve plate 7, swing arm 8 is connected on the valve body 1 by bearing pin 2, and valve plate 7 is around bearing pin 2 rotations during keying; Be welded with contiguous block 6 at the back of valve plate 7, have skewed slot on the contiguous block 6, one section straight trough is arranged at the not end of skewed slot; Drive unit 10 also is housed on valve body 1, and the piston rod 9 of drive unit 10 is horizontal, and piston rod 9 is connected by pin 5 with contiguous block 6 on the valve plate 7.When closing beginning, pin 5 is positioned at the top of skewed slot, along with the promotion of piston rod 9; pin 5 track of groove on contiguous block 6 slides, and valve plate 7 is closed gradually, when pin 5 is positioned at skewed slot and the straight trough intersection point is in; valve is in the complete shut-down state, and piston rod 9 continues to move ahead, and does not hold locking at straight trough.

Valve seat 3 planes and horizontal plane angle a are preferably 10 to 20 degree.

Drive unit 10 can be a cylinder, also can be oil hydraulic cylinder.

Claims (3)

1, a kind of unloading valve, comprise valve body, valve plate, seal ring, valve seat, seal ring is installed on the valve plate, it is characterized in that: described valve seat is inclined in the valve body, and valve seat planes and horizontal plane angle are a, and swing arm has been fixedly connected on the valve plate, swing arm is connected on the valve body by bearing pin, back at valve plate is welded with contiguous block, has skewed slot on the contiguous block, at the not end of skewed slot one section straight trough is arranged; Drive unit also is housed on valve body, and the piston rod of drive unit is horizontal, and piston rod is connected by pin with contiguous block on the valve plate.

2, unloading valve according to claim 1 is characterized in that: described valve seat planes and horizontal plane angle a are 10 to 20 degree.

3, unloading valve according to claim 1 and 2 is characterized in that: described drive unit is cylinder or oil hydraulic cylinder.

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