CN205260872U - Limit structure of valve rod - Google Patents

Abstract

The utility model provides a limit structure of valve rod, includes valve body, valve rod, bearing, end cover, on the valve rod suit bearing and the valve body penetrates and in, valve body bottom is through end cap seal and through the bolt fastening, the valve rod afterbody passes through the spacing pad of screw fixed mounting, be equipped with the adjustment between spacing pad and the end cover and fill up, spacing pad and bearing butt, it is spacing to carry out the axial. The beneficial effects of the utility model are that, both can realize that the axial was spacing, can carry out on -line maintenance again, and easy dismounting, simultaneously, when using for a long time, can change the spacing pad of wearing and tearing, and need not change the valve rod, it is convenient to change, practices thrift the cost.

Description

A limit structure of valve stem

Technical field

The utility model relates to an axial limiting structure of a valve rod, in particular to a limiting structure suitable for a valve rod of a butterfly valve.

Background technique

At present, the axial limit of the butterfly valve in the prior art is realized by the split ring installed in the valve shaft groove. The disadvantage is: the valve stem is grooved in the circumferential direction, which reduces the strength of the valve stem and shortens the service life; The open ring is difficult to install and easy to fall off; the valve stem needs to be removed as a whole in the later maintenance, which is inconvenient for maintenance and cannot be replaced online; during the operation of the valve, the valve stem directly rubs against the adjustment pad, which will cause wear at the end of the valve stem. Maintenance costs are high.

Contents of the invention

In order to overcome the shortcomings of the existing valve stem limiting structure, the utility model provides a valve stem limiting structure with simple structure, online maintenance and low maintenance cost.

The technical solution adopted by the utility model to solve the technical problem is that a position-limiting structure of a valve stem includes a valve body, a valve stem, a bearing, and an end cover. The end cover is sealed and fixed by bolts, and the end of the valve stem is fixed by screws to install a limit pad. There is an adjustment pad between the limit pad and the end cover, and the limit pad contacts the bearing to limit the axial position.

The beneficial effect of the utility model is that not only the axial limit can be realized, but also online maintenance can be carried out, and the disassembly and assembly are convenient; at the same time, the worn limit pad can be replaced without replacing the valve stem, and the replacement is convenient ,save costs.

Description of drawings

Fig. 1 is a schematic structural view of the embodiment.

In the figure: 1. Valve body; 2. Valve stem; 3. Screw; 4. Bearing; 5. Limit pad; 6. End cover; 7. Adjusting pad; 8. Bolt.

detailed description

As shown in Figure 1, a position-limiting structure of a valve stem includes a valve body 1, a valve stem 2, a bearing 4, and an end cover 6. The valve stem 2 is fitted with a bearing 4 and penetrates into the valve body 1. It is sealed by the end cover 6 and fixed by the bolt 8. The tail of the valve stem 2 is fixed by the screw 3 and the limit pad 5 is installed. There is an adjustment pad 7 between the limit pad 5 and the end cover 6, and the limit pad 5 is in contact with the bearing 4. , for axial limit.

During online maintenance, first unscrew the bolt 8, remove the end cover 6, and take off the adjustment pad 7, and then loosen the screw 3, the limit pad 5 or the bearing 4 can be replaced and repaired.

Claims (1)

1. the position limiting structure of a valve rod, comprise valve body, valve rod, bearing, end cap, bearing set penetrating in valve body on valve rod, valve body bottom is by end cap seal and be bolted, it is characterized in that: valve rod afterbody fixedly mounts spacing pad by screw, between spacing pad and end cap, be provided with adjusting pad, described spacing pad and described bearing butt, carry out axial limiting.