CN2135084Y - Positive-pressure plug valve - Google Patents

Abstract

The utility model relates to a valve, particularly a positive-pressure plug valve, which comprises a valve body 14, a valve cover 15 and a valve plug 13. The utility model is characterized in that an eccentric mechanism 8 is arranged in the valve body, a rotating shaft is respectively fixed on the upper part and the lower part of the eccentric mechanism, the upper rotating shaft is connected with a handle arranged outside the valve body, and the lower rotating shaft is connected with a connecting rod 10 connected with the valve plug. The utility model has the advantages of simple structure, convenient use, long service life, quick and flexible open and closure, etc.; besides, the abrasion of the rotating shaft for a sealing member is small.

Description

Positive-pressure plug valve

The utility model relates to a kind of valve, particularly a kind of Positive-pressure plug valve.

Existing various water valves etc., structure are complicated, and use repeatedly, and the Sealing rapid wear is opened and fitted badly, and easily leaks, and effort is time-consuming during switch water, and control inconvenience discloses a kind of piston type speedy control valve in CN1057893A, and it is made up of valve body, valve rod, valve plug.Valve plug is made up of annular sealing ring, plug core, ring-shaped sealing sleeve, and valve plug can be made axial free movement on valve rod, and its deficiency is: sealing part abrasion is bigger during switch, and the life-span is shorter, easily leaks, and takes a lot of trouble during operation.

The purpose of this utility model designs a kind of simple in structure exactly, use laborsaving, save time, easy to operate rapidly, the Positive-pressure plug valve of long service life.

The purpose of this utility model realizes by following structure: Positive-pressure plug valve includes valve body, valve gap and valve plug and Sealing, its major character is: an eccentric stiffener is arranged in valve body, an intrinsic lower rotary shaft below eccentric stiffener, be connected to the connecting rod that links to each other with valve plug on the lower rotary shaft, operating device outside valve body be fixed on the eccentric stiffener in the rotating shaft, when using the utility model, as long as rotary manipulation mechanism, driving eccentric stiffener by last rotating shaft rotates, connecting rod, valve plug on the pulling lower rotary shaft move throttle down.

The utility model is compared with valves such as existing various ball valves, stop valves has following advantage:

One. because of adopting eccentric stiffener, the angle of swing of operating device is little, thereby switch is rapid, opens and closes flexibly, and is easy to use.

Two. valve rod is only done rotatablely moving among a small circle, does not move up and down thereby has reduced the wearing and tearing of Sealing, makes it good sealing effect, does not have and leaks, and increase working life.

Three. the to-and-fro motion in valve plug and another Sealing are also only done among a small circle, do not rotate, gram has been answered the spin friction wearing and tearing of general valve, thereby does not also have leakage herein, and also increase working life.

Four, valve plug and Sealing are when closing, and except that the effect that is subjected to eccentric stiffener, other is subjected to the effect of medium brute force, and, increase with the pressure of liquid medium, seal tight more (overcome general valve and sealed the weakness that weakens) thereby do not have leakage with the increase of pressure.

Five. simple in structure, volume is little, the utilization scope is wide, can solve general valve race, cunning, leakage, problem such as drip.

Description of drawings of the present utility model is as follows:

Fig. 1 is a structural representation of the present utility model;

Among the figure: rotating shaft on 1 nut, 2 packing rings, 3 operating structures, 4,5 tight caps, 6 Sealings, 7 packing rings, 8 eccentric stiffeners, 9 lower rotary shafts, 10 connecting rods, 11 pins, 12 Sealings, 13 valve plugs, 14 valve bodies, 15 valve gaps, 16 stopples.

The utility model will be further described below in conjunction with drawings and Examples:

As shown in Figure 1: the utility model includes valve body 14, valve gap 15 and valve plug 13 and Sealing 6,12, one eccentric stiffener 8 is arranged in valve body, an intrinsic lower rotary shaft 9 below eccentric stiffener, on lower rotary shaft, be connected to a connecting rod 10 that is connected by pin 11 with valve plug, operating device 3 outside valve body be fixed on the eccentric stiffener in the rotating shaft 4, operating device can be rotating components such as handle or knob, for easy for installation, rotary shaft hole and stopple 16 are arranged, so that lower rotary shaft is fixed on the eccentric stiffener on the valve body below the lower rotary shaft; Eccentric stiffener can be an eccentric wheel, also by lower rotary shaft fixedly the circle of eccentric position take turns and constitute.

Claims (4)

1, a kind of Positive-pressure plug valve, include valve body 14, valve gap 15 and valve plug 13, and Sealing, it is characterized in that: an eccentric stiffener 8 in valve body, an intrinsic lower rotary shaft 9 is connected to the connecting rod 10 that links to each other with valve plug on lower rotary shaft under eccentric stiffener, the operating device 3 outside valve body be fixed on above the eccentric stiffener in the rotating shaft 4.

2, Positive-pressure plug valve as claimed in claim 1 is characterized in that: rotary shaft hole and stopple 16 are arranged on the valve body below the rotating shaft 9.

3, Positive-pressure plug valve as claimed in claim 1 is characterized in that: eccentric stiffener is an eccentric wheel.

4, Positive-pressure plug valve as claimed in claim 1 is characterized in that eccentric stiffener is to be made of the circle wheel that lower rotary shaft is fixed on its eccentric position.

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