CN205298623U - Compound seal structure of box -like ball valve of multichannel multiunit - Google Patents

Abstract

The utility model discloses a composite sealing structure of a multi-channel multi-combination ball valve, which comprises a valve body, a ball, an inner valve seat and an outer valve seat. The inner valve seat and the outer valve seat are overlapped in the radial direction, and a spring is arranged between the inner valve seat, the outer valve seat and the valve body so that the inner valve seat and the outer valve seat are in close contact with the ball , between the inner valve seat and the outer valve seat and the valve body, graphite ropes and sealing rings are arranged, the inner valve seat is a metal sealing valve seat or a rubber sealing valve seat or a plastic sealing valve seat, and the outer valve seat is a metal sealing valve seat Seat or rubber sealing seat or plastic sealing seat. The utility model can be reliably used for the valve seat sealing scheme of the pipeline cut-off valve with high sealing performance requirements, poor working medium conditions and long service life requirements, and each group of sealing valve seats can be replaced separately.

Description

A multi-channel multi-combination ball valve composite sealing structure

technical field

The utility model relates to a sealing structure of a ball valve, in particular to a compound sealing structure of a multi-channel multi-combination ball valve.

Background technique

The existing ball valve seat structure is mainly a single valve seat composed of rubber sealing valve seat, metal sealing valve seat or plastic sealing valve seat; the valve is only sealed at the medium inflow end (ie upstream end), that is, only one valve seat can seal, Once the valve seat is damaged by particles in the medium and the seal fails, even if the downstream valve seat is intact, the entire valve will fail immediately.

Utility model content

The utility model aims to provide a multi-combination and reliable valve seat sealing scheme for pipeline shut-off valves with high sealing performance requirements, poor working medium conditions and long service life requirements. Each group of sealing valve seats can be replaced separately.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

The utility model discloses a composite sealing structure of a multi-channel multi-combination ball valve, comprising a valve body, a ball, an inner valve seat, and an outer valve seat. A valve seat and an outer valve seat, the inner valve seat and the outer valve seat are overlapped in the radial direction of the medium passage, and the inner valve seat, the outer valve seat and the valve body are arranged so that the inner valve seat and the outer valve seat are closely connected to the ball Contact springs, graphite ropes and sealing rings are arranged between the inner valve seat and the outer valve seat and the valve body, the inner valve seat is a metal sealing valve seat or a rubber sealing valve seat or a plastic sealing valve seat, and the outer valve seat It is a metal sealing valve seat or a rubber sealing valve seat or a plastic sealing valve seat.

Preferably, the rubber-sealed valve seat includes a valve seat support a, a scraper, and a rubber ring. The scraper and the rubber ring are installed on the valve seat support a. The scraper and the rubber ring are overlapped in the radial direction, and the scraper is located at Inside the rubber ring, the spring, graphite rope, and sealing ring are in contact with the valve seat support a, and the scraper and the rubber ring are in contact with the ball.

Further, the plastic sealing valve seat includes a valve seat support b and a plastic valve seat, the plastic valve seat is installed on the valve seat support b, the spring, graphite rope, and sealing ring are in contact with the valve seat support b, the The plastic seat is in contact with the ball.

Preferably, a retaining ring for protecting the sealing ring is provided between the valve seat support a and the valve body.

Further, the retaining ring is an arc retaining ring.

Further, the sealing ring is an O-ring.

The utility model has the following beneficial effects:

1. The innovative design combines the inner and outer valve seats to form a multi-stage valve seat structure, and each valve seat can individually achieve sealing and cut off the conveying medium;

2. When the inner valve seat seal fails, it can also play a role in cleaning the spherical surface and prevent impurities and particles from being away from the outer valve seat seal;

3. This structure significantly improves the reliability of the valve seal and prolongs the service life of the valve;

4. The structure can choose different combinations according to the actual situation (as shown in Table 1).

Table 1. Combination Types

Description of drawings

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

Fig. 2 is a structural schematic diagram of a rubber sealing valve seat;

Fig. 3 is a structural schematic diagram of a metal sealing valve seat;

Fig. 4 is the structural representation of plastic seal valve seat;

In the figure: 1-valve body, 2-inner valve seat, 3-outer valve seat, 4-ball, 5-spring, 6-sealing ring, 7-graphite rope, 8-valve seat support a, 9-scraper, 10-rubber ring, 11-retaining ring, 12-metal seal valve seat, 13-valve seat support b, 14-plastic valve seat.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1-4, the utility model includes a valve body 1, a ball 4, an inner valve seat 2, and an outer valve seat 3. A valve seat 2 and an outer valve seat 3, the inner valve seat 2 and the outer valve seat 3 are overlapped in the radial direction of the medium passage, and a spring 5 is arranged between the inner valve seat 2, the outer valve seat 3 and the valve body 1, and the spring 5 makes The inner valve seat 2 and the outer valve seat 3 are in close contact with the sphere 4, graphite rope 7 and sealing ring 6 are arranged between the inner valve seat 2, the outer valve seat 3 and the valve body 1, and the inner valve seat 2 is a metal sealing valve seat 12 Or rubber sealing valve seat or plastic sealing valve seat, outer valve seat 3 is metal sealing valve seat 12 or rubber sealing valve seat or plastic sealing valve seat, rubber sealing valve seat includes valve seat support a8, scraper 9, rubber ring 10, The scraper 9 and the rubber ring 10 are installed on the valve seat support a8, the scraper 9 and the rubber ring 10 are overlapped in the radial direction, the scraper 9 is located inside the rubber ring 10, the spring 5, the graphite rope 7, the sealing ring 6 and the valve seat The support a8 is in contact, the scraper 9 and the rubber ring 10 are in contact with the ball 4, and there is a retaining ring 11 between the valve seat support a8 and the valve body 1, which can protect the sealing ring 6; the plastic sealing valve seat includes the valve seat support b13, plastic valve seat 14, the plastic valve seat 14 is installed on the valve seat support b13, the spring 5, the graphite rope 7, the seal ring 6 are in contact with the valve seat support b13, and the plastic valve seat 14 is in contact with the sphere 4. In a preferred manner, the sealing ring 6 is an O-ring, and the retaining ring 11 is an arc retaining ring.

Certainly, the present utility model also can have other various embodiments, without departing from the spirit and essence of the present utility model, those skilled in the art can make various corresponding changes and deformations according to the present utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (6)

1. A multi-channel multi-combination ball valve composite sealing structure, characterized in that: it comprises a valve body, a sphere, an inner valve seat, and an outer valve seat, the sphere is located in the valve body, and a medium inflow end and an outflow end of the sphere are all provided with a An inner valve seat and an outer valve seat, the inner valve seat and the outer valve seat are overlapped in the radial direction of the medium channel, and the inner valve seat, the outer valve seat and the valve body are arranged so that the inner valve seat, the outer valve seat and the ball Springs in close contact, graphite ropes and sealing rings are arranged between the inner valve seat and the outer valve seat and the valve body, the inner valve seat is a metal sealing valve seat or a rubber sealing valve seat or a plastic sealing valve seat, the outer valve seat The seat is a metal sealing valve seat or a rubber sealing valve seat or a plastic sealing valve seat. 2. A multi-channel multi-combination ball valve composite sealing structure according to claim 1, characterized in that: the rubber sealing valve seat includes a valve seat support a, a scraper, a rubber ring, and the scraper and rubber ring Installed on the valve seat support a, the scraper and the rubber ring are overlapped in the radial direction, the scraper is located inside the rubber ring, the spring, graphite rope, and sealing ring are in contact with the valve seat support a, and the scraper, rubber ring and The spheres touch. 3. A multi-channel multi-combination ball valve composite sealing structure according to claim 1, characterized in that: the plastic sealing valve seat includes a valve seat support b and a plastic valve seat, and the plastic valve seat is installed on the valve seat On the support b, the spring, the graphite rope, and the sealing ring are in contact with the valve seat support b, and the plastic valve seat is in contact with the sphere. 4. The multi-channel multi-combination ball valve composite sealing structure according to claim 2, characterized in that: a retaining ring for protecting the sealing ring is arranged between the valve seat support a and the valve body. 5 . The multi-channel multi-combination ball valve composite sealing structure according to claim 4 , wherein the retaining ring is an arc retaining ring. 6 . 6. A composite sealing structure for a multi-channel multi-combination ball valve according to any one of claims 1-5, wherein the sealing ring is an O-ring.