CN207349490U - Two way seal float ball valve - Google Patents

Abstract

This utility model discloses a bidirectional sealing floating ball valve, comprising a valve body and a valve cap. A hollow cavity is provided between the valve body and the valve cap, and a valve ball is placed inside the hollow cavity. An upstream valve seat, an upstream sealing ring, an upstream pressure ring, and an upstream disc spring are sequentially arranged between the valve ball and the valve cap. The valve cap has an upstream valve seat stop step, and the cavity formed between the upstream valve seat stop step and the upstream valve seat contains the upstream disc spring. A downstream valve seat, a downstream sealing ring, a downstream pressure ring, and a downstream disc spring are sequentially arranged between the valve ball and the valve body. The valve body has a downstream valve seat stop step, and the cavity formed between the downstream valve seat stop step and the downstream valve seat contains the downstream disc spring. This utility model achieves quantitative floating of the valve ball and avoids overload of the disc spring.

Description

Two-way sealed floating ball valve

technical field

The utility model belongs to the technical field of ball valves, in particular to a bidirectional sealing floating ball valve.

Background technique

For hard-sealed ball valves under high-temperature conditions and the medium contains solid particles, in order to prevent the valve from jamming or jamming during the heating process, it is generally necessary to use a floating ball structure; however, due to structural limitations, traditional hard-sealed ball valves cannot Realize two-way sealing under the condition of solid material.

In the existing hard-sealed ball valve structure, when the upstream pressure is higher than the downstream pressure, due to the existence of pressure difference, the ball valve will be pushed to the downstream by a medium thrust; at this time, the downstream valve seat can closely fit the valve ball, while the upstream The disc spring can push the upstream valve seat to move downstream, and then the upstream valve seat can also fit the valve ball to achieve sealing; if the downstream pressure is higher than the upstream pressure, and the thrust is higher than the upstream disc spring force, the disc spring exceeds the tolerance The limit of the upstream disc spring will be crushed and failed; since there is no disc spring at the downstream end, there is a gap between the valve ball and the downstream valve seat. If solid particles in the medium enter, when there is a positive pressure difference again, the valve will Unable to achieve sealing.

Therefore, the traditional hard-sealed ball valve may cause medium backflow due to the existence of reverse pressure, which cannot be sealed, which brings huge safety hazards.

Utility model content

The purpose of the utility model is to solve the above-mentioned technical problems, and provide a two-way sealed floating ball valve, so as to realize the quantitative floating of the valve ball and avoid the overload of the disc spring. In order to achieve the above object, the utility model technical scheme is as follows:

A two-way sealed floating ball valve includes a valve body and a bonnet, a hollow cavity is provided between the valve body and the bonnet, a valve ball is placed in the hollow cavity, and the valve ball and the bonnet An upstream valve seat, an upstream sealing ring, an upstream pressure ring and an upstream disc spring are sequentially arranged between them, and the valve cap is provided with an upstream valve seat stop step, and the stop step between the upstream valve seat stop step and the upstream valve seat An upstream disc spring is placed in the cavity formed between the valve ball and the valve body, and a downstream valve seat, a downstream sealing ring, a downstream pressure ring and a downstream disc spring are arranged in sequence between the valve ball and the valve body. The valve seat stop step, the cavity formed between the downstream valve seat stop step and the downstream valve seat houses a downstream disc spring.

Specifically, the upstream sealing ring and the upstream pressure ring are sleeved on the upstream valve seat.

Specifically, the downstream sealing ring and the downstream pressing ring are sleeved on the downstream valve seat.

Compared with the prior art, the beneficial effects of the utility model's two-way sealed floating ball valve are mainly reflected in: no matter the forward pressure or the reverse pressure in the pipeline, the upper and lower valve seats can be closely attached to the valve ball, and the solid particles cannot Enter between the valve seat and the valve ball to achieve double sealing; at the same time, because of the existence of the stop step, the quantitative floating of the valve ball can be realized, avoiding the overload of the disc spring, and ensuring the service life of the disc spring.

Description of drawings

Fig. 1 is the sectional view of the utility model embodiment;

Fig. 2 is a partially enlarged view of I in Fig. 1;

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

The numbers in the figure indicate:

1 valve body, 11 downstream valve seat, 12 downstream sealing ring, 13 downstream pressure ring, 14 downstream disc spring, 15 downstream valve seat stop step, 2 valve cap, 21 upstream valve seat, 22 upstream sealing ring, 23 upstream pressure ring , 24 upstream disc springs, 25 upstream valve seat stop steps, 3 valve balls.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them.

Example:

Referring to Figures 1-3, this embodiment is a two-way sealed floating ball valve, including a valve body 1 and a bonnet 2, a hollow cavity is provided between the valve body 1 and the bonnet 2, and a valve ball is placed in the hollow cavity 3. The valve ball 3 is a floating ball. An upstream valve seat 21 , an upstream sealing ring 22 , an upstream compression ring 23 and an upstream disc spring 24 are sequentially arranged between the valve ball 3 and the valve cap 2 .

The upstream sealing ring 22 and the upstream compression ring 23 are sleeved on the upstream valve seat 21 . Upstream seat on bonnet 2

Stop step 25. The cavity formed between the upstream valve seat stop step 25 and the upstream valve seat 21 is placed

There is an upstream disc spring 24 .

A downstream valve seat 11 , a downstream sealing ring 12 , a downstream compression ring 13 and a downstream disc spring 14 are sequentially arranged between the valve ball 3 and the valve body 1 .

The downstream sealing ring 12 and the downstream pressure ring 13 are sleeved on the downstream valve seat 11 . The valve body 1 is provided with a downstream valve seat stop step 15 .

A downstream disc spring 14 is housed in a cavity formed between the downstream valve seat stop step 15 and the downstream valve seat 11 .

When applying this embodiment, if the upstream pressure is higher than the downstream pressure, due to the existence of the pressure difference, when the medium thrust is higher than the disc spring force, the medium will push the valve ball 3 to transmit the thrust to the downstream valve seat 11, the downstream seal in turn. The ring 12 and the downstream pressure ring 13 further push the downstream disc spring 14. At this time, the downstream valve seat 11 is closely attached to the valve ball 3; at the same time, the upstream disc spring 24 will also push the upstream valve seat 21 to move downstream, and then the upstream The valve seat 21 can also make the valve ball 3 closely fit, the solid particles in the medium cannot enter between the valve seat and the valve ball 3, and the valve realizes sealing; since the valve body 1 is provided with a downstream valve seat stop step 15, when the downstream When the valve seat 11 moves to a certain extent, the downstream valve seat stop step 15 prevents the downstream valve seat 11 from continuing to move, thereby ensuring that the downstream disc spring 14 will not be further compressed to prevent the disc spring from being crushed.

Similarly, if the downstream pressure is higher than the upstream pressure, due to the downstream disc spring 14, the valve ball 3, the upstream valve seat 21 and the downstream valve seat 11 can be in close contact with the valve ball 3 to achieve sealing; at the same time, because the upstream valve The existence of the seat stop step 25 can prevent the upstream disc spring 24 from being crushed.

Therefore, regardless of the forward pressure or reverse pressure in the pipeline, the upstream and downstream valve seats can be closely attached to the valve ball 3, and solid particles cannot enter between the valve seat and the valve ball 3, thereby achieving double sealing; The existence of the position step can realize the quantitative floating of the valve ball 3, avoid the overload of the disc spring, and ensure the service life of the disc spring.

What have been described above are only some embodiments of the present utility model. For those skilled in the art, without departing from the inventive concept of the present utility model, some modifications and improvements can be made, and these all belong to the protection scope of the present utility model.

Claims (3)

1. A two-way sealed floating ball valve, including a valve body and a bonnet, a hollow cavity is provided between the valve body and the bonnet, and a valve ball is placed in the hollow cavity, and it is characterized in that: the valve An upstream valve seat, an upstream sealing ring, an upstream pressure ring and an upstream disc spring are sequentially arranged between the ball and the bonnet, and an upstream valve seat stop step is provided on the bonnet, and the upstream valve seat stop step and the An upstream disc spring is placed in the cavity formed between the upstream valve seats, and a downstream valve seat, a downstream sealing ring, a downstream pressure ring and a downstream disc spring are sequentially arranged between the valve ball and the valve body. The valve body is provided with a downstream valve seat stop step, and a downstream disc spring is placed in a cavity formed between the downstream valve seat stop step and the downstream valve seat. 2 . The two-way sealing floating ball valve according to claim 1 , wherein the upstream sealing ring and the upstream compression ring are sleeved on the upstream valve seat. 3 . 3 . The two-way sealing floating ball valve according to claim 1 , wherein the downstream sealing ring and the downstream pressing ring are sleeved on the downstream valve seat. 4 .