CN205956440U - Seal structure of unsteady ball valve of metal seal - Google Patents

Abstract

The utility model relates to a sealing structure of a metal-sealed floating ball valve, which is arranged between a valve body and a ball. The valve body has a liquid inlet and a liquid outlet connected to each other. In the valve body, it includes a first valve seat in contact with the sphere and corresponding to the liquid inlet, a second valve seat in contact with the sphere and corresponding to the liquid outlet, and is arranged on the The pressure ring on the side of the first valve seat, the graphite sealing ring clamped between the pressure ring and the first valve seat, and the pressure ring arranged between the valve body and the pressure ring for resisting the pressure ring spring. In this way, two seals can be realized between the pressure ring and the graphite seal ring and between the graphite seal ring and the first valve seat, which solves the problem of difficult sealing of the single seal metal seal floating ball valve.

Description

A sealing structure of a metal-sealed floating ball valve

technical field

The utility model belongs to the field of valves and relates to a sealing structure, in particular to a sealing structure of a metal sealing floating ball valve.

Background technique

The sealing structure of the existing metal-sealed floating ball valve is shown in Figure 1. It is arranged between the valve body 1 (the valve body 1 includes a connected liquid inlet 11 and a liquid outlet 12) and the ball 2, including The first valve seat 31 is sealed and located on one side of the sphere 2 (the side near the liquid inlet 11), and the second valve seat 31 is sealed with the sphere 2 and is located on the other side of the sphere 2 (the side near the liquid outlet 12). The valve seat 33 and the spring 32 arranged between the valve body 1 and the first valve seat 31 for resisting the first sealing pressure ring 31 only form a single-way seal, which causes certain problems in the sealing of the floating ball valve.

Contents of the invention

The purpose of the utility model is to provide a sealing structure of a metal-sealed floating ball valve in order to overcome the deficiencies of the prior art.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a sealing structure of a metal-sealed floating ball valve, which is arranged between the valve body and the ball, and the valve body has a connected liquid inlet and a liquid outlet, The ball is rotatably installed in the valve body, which includes a first valve seat in contact with the ball and corresponding to the liquid inlet, a valve seat in contact with the ball and corresponding to the liquid outlet The corresponding second valve seat, the pressure ring arranged on the side of the first valve seat, the graphite sealing ring clamped between the pressure ring and the first valve seat, and the valve body and the pressure ring between the springs against the pressure ring.

Preferably, a protruding ring is formed on the side of the first valve seat, and an accommodating space for accommodating the graphite sealing ring is formed between the protruding ring and the valve body.

Further, the outer surface of the graphite sealing ring forms a concave ring, and the side surfaces of the pressure ring are respectively formed with a groove engaging with the convex ring and a protrusion engaging with the concave ring.

Due to the application of the above-mentioned technical solutions, the utility model has the following advantages compared with the prior art: the sealing structure of the metal-sealed floating ball valve of the utility model is provided with a pressure ring on the side of the first valve seat, and the pressure ring and the first valve seat The graphite sealing ring is arranged between the seats, so that two seals can be realized between the pressing ring and the graphite sealing ring and between the graphite sealing ring and the first valve seat, which solves the problem of difficult sealing of the single sealing metal sealing floating ball valve.

Description of drawings

Accompanying drawing 1 is the structural representation of existing metal seal floating ball valve sealing structure;

Accompanying drawing 2 is the structural schematic diagram of the sealing structure of the metal-sealed floating ball valve of the present invention;

Accompanying drawing 3 is the partial enlarged view of accompanying drawing 2;

Among them, 1. valve body; 11. liquid inlet; 12. liquid outlet; 2. sphere; 3. sealing structure; 31. first valve seat; 32. spring; 33. second valve seat; 1′. Body; 11', liquid inlet; 12', liquid outlet; 2', sphere; 3', sealing structure; 31', first valve seat; 311', convex ring; 312', accommodating space; 32' , spring; 33', second valve seat; 35', pressure ring; 351', groove; 352', protrusion; 36', graphite sealing ring; 361', concave ring.

detailed description

The utility model will be further described below in conjunction with the embodiment shown in the accompanying drawings.

As shown in Fig. 2, the sealing structure 3' of the metal-sealed floating ball valve includes a first valve seat 31', a spring 32', a second valve seat 33' and a pressure ring 35'. The sealing structure is arranged between the valve body 1' and the ball 2', the valve body 1' has a connected liquid inlet 11' and a liquid outlet 12', and the ball 2' is rotatably installed on the valve body 1' Inside.

Among them, the first valve seat 31' is in contact with the sphere 2' and corresponds to the liquid inlet 11', the second valve seat 33' is in contact with the sphere 2' and corresponds to the liquid outlet 12', the first valve seat 31' and the second valve seat 33' are respectively in contact with the ball 2', so as to realize the sealing between them. The pressure ring 35' is arranged on the outer surface of the first valve seat 31', and the graphite sealing ring 36' is clamped between the pressure ring 35' and the first valve seat 31', so that the graphite sealing ring 36' and the pressure ring 35', two seals between the graphite sealing ring 36' and the first valve seat 31'. The spring 32' is arranged between the valve body 1' and the pressure ring 35', and is used to bear against the pressure ring 35' to ensure the above two seals.

In this embodiment, a protruding ring 311' is formed on the outer surface of the first valve seat 31', and an accommodating space 312' for accommodating the graphite sealing ring 36' is formed between the protruding ring 311' and the valve body 1'. The outer surface (left side) of the graphite sealing ring 36' forms a concave ring 361', and the inner surface (right side) of the pressure ring 35' is respectively formed with a groove 351' engaging with the convex ring 311' and a concave ring 351'. The protrusion 352' engaged with the ring 361' can improve the degree of sealing between the graphite sealing ring 36' and the pressure ring 35', and between the graphite sealing ring 36' and the first valve seat 31'.

The above-mentioned embodiments are only to illustrate the technical concept and characteristics of the present utility model, and its purpose is to enable those familiar with this technology to understand the content of the present utility model and implement it accordingly, and not to limit the protection scope of the present utility model. All equivalent changes or modifications made according to the spirit of the utility model shall fall within the protection scope of the utility model.

Claims (3)

1. A sealing structure of a metal-sealed floating ball valve, which is arranged between a valve body (1 ') and a spheroid (2 '), and said valve body (1 ') has a connected liquid inlet (11 ') and Liquid outlet (12'), the ball (2') is rotatably installed in the valve body (1'), characterized in that it includes contact with the ball (2') and with the The first valve seat (31') corresponding to the liquid inlet (11'), the second valve seat (33') in contact with the sphere (2') and corresponding to the liquid outlet (12') ), the pressure ring (35') arranged on the side of the first valve seat (31'), the graphite seal between the pressure ring (35') and the first valve seat (31') A ring (36') and a spring (32') arranged between the valve body (1') and the pressure ring (35') for resisting the pressure ring (35'). 2. The sealing structure of the metal-sealed floating ball valve according to claim 1, characterized in that: a protruding ring (311') is formed on the side of the first valve seat (31'), and the protruding ring (311') and An accommodating space (312') for accommodating the graphite sealing ring (36') is formed between the valve bodies (1'). 3. The sealing structure of the metal-sealed floating ball valve according to claim 2, characterized in that: the outer surface of the graphite sealing ring (36') forms a concave ring (361'), and the pressure ring (35') A groove (351') engaged with the convex ring (311') and a protrusion (352') engaged with the concave ring (361') are respectively formed on the side.