CN205423861U - Welding butterfly valve - Google Patents

Abstract

The utility model discloses a welding butterfly valve has valve body and valve rod, is equipped with the dish board in the valve body, and the dish board is fixed on the valve rod, is equipped with between the valve rod on upper portion and the valve body to be equipped with the lower liner cover between valve rod and the valve body of bush, lower part, and the lower extreme of valve body is equipped with the tail -hood, and the lower extreme of valve rod is equipped with the divided ring, still is equipped with sealed the pad between tail -hood and the valve body, seal the downside and tail -hood butt, sealed upside while and divided ring and valve rod butt of filling up that fill up. The utility model discloses the beneficial effect who has: it is in fact sealed through packing ring and dish board sealing washer between valve body and the dish board, compare the direct structure with body seals of traditional sealing washer, sealed effect is better, has avoided the damage of valve body simultaneously, and the change can after the packing ring loss. Sealed pad can seal up clearance and the clearance between valve body and the divided ring between clearance, tail -hood and the divided ring between valve body and the tail -hood simultaneously, and is sealed effectual.

Description

A Welded Butterfly Valve

technical field

The utility model relates to the related technical field of butterfly valves, in particular to a welding butterfly valve.

Background technique

Butterfly valve, also known as flap valve, is a regulating valve with simple structure, which can be used for switch control of low-pressure pipeline medium. A kind of valve, the valve can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media, and it mainly plays the role of cutting and throttling on the pipeline. Butterfly valve is mainly composed of valve body, valve seat, valve plate, valve shaft and transmission device. Welded butterfly valve is a kind of butterfly valve. Welded butterfly valve is divided into cast steel welded butterfly valve, stainless steel welded butterfly valve, and chromium molybdenum steel welded butterfly valve.

Utility model content

The purpose of the utility model is to provide a welded butterfly valve with good sealing effect in order to make up for the deficiencies of the prior art.

In order to achieve the purpose of this utility model, technical scheme is as follows:

A welded butterfly valve has a valve body and a valve stem. A disc plate is arranged in the valve body, and the disc plate is fixed on the valve stem. It is characterized in that an upper bushing and a lower valve stem There is a lower bushing between the valve body and the valve body, a tail cover is provided at the lower end of the valve body, a split ring is provided at the lower end of the valve stem, and a gasket is provided between the tail cover and the valve body, and the lower side of the gasket is It abuts against the tail cover, and the upper side of the gasket abuts against the split ring and the valve stem at the same time.

Further, a packing is provided above the upper bushing, and the packing is arranged between the valve body and the valve stem, and a packing gland is provided above the packing, and the packing gland is fixedly connected with the upper end of the valve body by bolts, and the packing gland A bracket is arranged above the bracket, and a worm gear device, a transmission device and a handle connected in sequence are arranged on the bracket, and the worm gear device is connected with the upper end of the valve stem.

The beneficial effect that the utility model has:

The valve body and the disc are actually sealed by gaskets and disc sealing rings. Compared with the traditional structure where the sealing ring directly seals with the valve body, the sealing effect is better, and at the same time, the damage to the valve body is avoided. The gasket is replaced after it is worn out. Can. The gasket can simultaneously seal the gap between the valve body and the tail cap, the gap between the tail cap and the split ring, and the gap between the valve body and the split ring, and the sealing effect is good.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of a welded butterfly valve of the present invention;

Fig. 2 is the side structure schematic diagram of the welding butterfly valve of the present utility model;

Fig. 3 is a partially enlarged view of Fig. 1;

Fig. 4 is an enlarged view of position I in Fig. 1 .

detailed description

The utility model will be further described below in conjunction with the examples, but the protection scope of the utility model is not only limited to the examples.

As shown in FIG. 1 and FIG. 2 , a welded butterfly valve has a valve body 12 and a valve stem 7 . The valve body 12 is provided with a disc plate 8 , and the disc plate 8 is fixed on the valve stem 7 through cylindrical pins 6 . An upper bushing 13 is arranged between the upper valve stem 7 and the valve body 12 , and a lower bushing 5 is arranged between the lower valve stem 7 and the valve body 12 . As shown in Figure 3, the lower end of the valve body 12 is provided with a tail cap 1, the lower end of the valve stem 7 is provided with a split ring 4, and a gasket 3 is also provided between the tail cap 1 and the valve body 12, and the gasket 3 The lower side of the lower side is in contact with the tail cap 1, and the upper side of the gasket 3 is in contact with the split ring 4 and the valve stem 7 at the same time. The gasket can simultaneously seal the gap between the valve body 12 and the tail cap 1, and the tail cap 1 and the The gap between the split rings 4 and the gap between the valve body 12 and the split rings 4 have a good sealing effect.

A packing 14 is arranged above the upper bushing 13, and the packing 14 is arranged between the valve body 12 and the valve stem 7. A packing gland 15 is arranged above the packing 14, and the upper end of the packing gland 15 and the valve body 12 are fixed by bolts. connect. A bracket 16 is arranged above the packing gland 15, and a worm gear device 20, a transmission device and a handle 19 connected in sequence are arranged on the bracket 16, and the worm gear device 20 is connected with the upper end of the valve stem 7. Turn handle 19, drive valve stem 7 to rotate by transmission device 18 again, realize switch valve.

As shown in Figure 4, a gasket 17 is installed on the inner ring of the valve body 12, and a disc sealing ring 11 is installed on the disc plate 8, and the disc sealing ring 11 is fixed on the disc plate 8 through the sealing ring pressure plate 9 and the hex head bolt 10 , the outer end of the disc sealing ring 11 abuts against the gasket 17 to play a sealing role.

Finally, it should be noted that: the above embodiments are only used to illustrate the utility model rather than limit the technical solution described in the utility model, therefore, although the description has described the utility model in detail with reference to the above-mentioned various embodiments, but Those of ordinary skill in the art should understand that the utility model can still be modified or equivalently replaced, and all technical solutions and improvements that do not depart from the spirit and scope of the utility model should be covered by the claims of the utility model in range.

Claims (2)

1. A welded butterfly valve has a valve body (12) and a valve stem (7). The valve body is provided with a disc plate (8), and the disc plate is fixed on the valve stem. It is characterized in that the upper valve stem and the valve body There is an upper bushing (13) between them, a lower bushing (5) between the lower valve stem and the valve body, a tail cover (1) at the lower end of the valve body, and a split ring (1) at the lower end of the valve stem ( 4) A gasket (3) is also provided between the tail cap and the valve body, the lower side of the gasket abuts against the tail cap, and the upper side of the gasket abuts against the split ring and the valve stem at the same time. 2. The welded butterfly valve according to claim 1, characterized in that a packing (14) is provided above the upper bushing, the packing is arranged between the valve body and the valve stem, and a packing gland (15) is provided above the packing. ), the packing gland and the upper end of the valve body are fixedly connected by bolts, a support (16) is arranged above the packing gland, and a worm gear device (20), a transmission device and a handle (19) connected in sequence are arranged on the support, The worm gear device is connected with the upper end of the valve rod.