CN2428641Y - valve seal - Google Patents

Abstract

The utility model provides a valve seal between a valve flow channel and a valve stop body, which includes a non-metal elastic annular body, and the improvement thereof is that the elastic annular body is provided with an annular sealing lip. With this structure of the seal, when the valve is in a closed state, the pressure in the valve flow channel causes the sealing surface of the sealing lip of the seal to be pressed tightly against the valve stop body, so that the valve does not leak, and the wear of the sealing surface of the seal during operation can be compensated, thereby extending the service life of the valve.

Description

valve seal

The utility model relates to a valve seal, in particular to a valve seal between a valve flow channel and a valve cut-off body.

At present, in various known valves, the seal between the valve flow channel and the cut-off body is an elastic annular body. During the use of the seal with this structure, the medium in the cut-off body and the flow channel will wear the seal. The sealing surface, when the valve is in the closed state, a gap is formed between the sealing surface of the seal and the cut-off body, so that the valve is not closed tightly and causes leakage, which shortens the service life of the valve.

The purpose of the utility model is to provide a valve seal between the valve channel and the valve cut-off body, so as to overcome the deficiencies of the known technology.

The utility model is achieved in the following way: a valve seal between the valve flow channel and the valve cut-off body, which includes a non-metallic elastic annular body, the improvement of which is that the elastic annular body has an annular sealing lip .

The valve sealing part of the utility model can be that the sealing surface where the sealing lip contacts the valve cut-off body is a curved surface.

The valve sealing part of the utility model may be that the sealing surface where the sealing lip contacts the valve cut-off body is a plane.

The valve sealing part of the present utility model can be that the elastic annular body is a garden barrel body.

The valve sealing part of the present utility model can be that the elastic annular body is an annular body composed of a garden barrel body and a garden ring body.

The valve sealing part of the utility model can be an elastic annular body which is a garden annular body.

The utility model provides a valve seal between the valve flow passage and the valve cut-off body. When the valve is in the closed state, the pressure in the valve flow passage makes the sealing surface of the sealing lip of the seal be pressed against the valve cut-off body, and the valve No leakage, the valve seal of this structure can compensate the wear of the sealing surface during operation, prolonging the service life of the valve.

Figure 1: A front view of a structure of the utility model valve seal.

Figure 2: A-A sectional view of Figure 1.

Fig. 3: Schematic diagram of the sealing method of the valve seal in Fig. 1 and Fig. 2 in the ball valve.

Figure 4: Schematic diagram of another structure of the utility model valve seal in the sealing mode of the stop valve and the cock.

Figure 5: Schematic diagram of the sealing method of a valve seal similar in structure to that in Figure 4 in a column valve.

Fig. 6: Schematic diagram of the sealing method of another structure of the valve seal of the present invention in the plate valve.

Figure 7: Schematic diagram of the sealing method of a valve seal similar to that in Figure 6 in a butterfly valve and a check valve.

The utility model will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Embodiment 1, Fig. 1 and Fig. 2 have provided a kind of concrete structure of the valve seal between the valve channel of the present invention and the valve cut-off body, as shown in the figure, it comprises a non-metallic elastic annular body, elastic ring There is a sealing lip 2 on the shape body, and the elastic ring shape body is a garden barrel body 1. Figure 3 shows the sealing method of this valve seal in the ball valve, the sealing surface where the sealing lip 2 contacts the valve cut-off body 3 is a curved surface. The sealing lip 2 forms an annular cavity with the end face of the flow channel of the valve. When the valve is in the closed state, the pressure in the flow channel makes the sealing surface of the sealing lip and the valve cut-off body tightly pressed, the valve does not leak, and the sealing surface can be compensated during operation. wear and tear. The valve seals mentioned above are also suitable for the sealing of globe valves, plug valves, column valves, butterfly valves, check valves and plate valves.

Embodiment 2, Fig. 4 has provided another kind of structure sealing mode of the valve seal of the present invention in the shut-off valve and the cock, as shown in the figure, the valve seal of this structure is made of a garden barrel body 1 and a The non-metallic elastic ring body that garden ring body 4 forms has seal lip 2 on the elastic ring body, and the sealing surface that seal lip contacts with valve cut-off body 5 is a curved surface. The sealing lip forms an annular cavity with the end face of the flow channel of the valve, and its sealing principle is the same as that of Embodiment 1. Figure 5 shows the sealing method of a valve seal similar to the structure in Figure 4 in a column valve. The annular body, the elastic annular body has an annular sealing lip 2, and the sealing surface where the sealing lip 2 contacts with the valve stop body 6 is a curved surface. Its sealing principle is the same as that of Embodiment 1, and the valve seal in Fig. 4 is also suitable for sealing other valves.

Embodiment 3, Figure 6 shows the sealing method of another structure of the valve seal of the present invention in the plate valve, as shown in the figure, the non-metallic elastic ring body of the valve seal of this structure is a The garden ring body 7 has a sealing lip 2 on the garden ring body 7, and the sealing surface that the sealing lip 2 contacts with the valve cut-off body 8 is a plane. Its sealing principle is the same as that of Embodiment 1. Fig. 7 shows the sealing method of the valve seal with basically the same structure as that in Fig. 6 in butterfly valves and check valves. The angle between the ring body 7 and the sealing lip 2 is different from that of the seal in Fig. 6, and the sealing The sealing surface where the lip contacts the cut-off body 9 is a curved surface. Its sealing principle is the same as that of Embodiment 1. The basic structure of the seal shown in Figure 6 is also suitable for sealing other valves.

Claims (6)

1, a kind of valve flowing channel and valve are by the valve sealing element between the body, and it comprises a nonmetal elastic annular body, it is characterized in that having an annular seal lip on the elastic annular body.

2, valve sealing element according to claim 1 is characterized in that sealing lip is curved surface with valve by the sealing surface that body contacts.

3, valve sealing element according to claim 1 is characterized in that sealing lip is the plane with valve by the sealing surface that body contacts.

4,, it is characterized in that the elastic annular body is a garden staving according to claim 2 or 3 described valve sealing elements.

5,, it is characterized in that the elastic annular body is by a garden staving and the ring bodies that the garden ring body constitutes according to claim 2 or 3 described valve sealing elements.

6,, it is characterized in that the elastic annular body is a garden ring body according to claim 2 or 3 described valve confidential paper.

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