CN204942570U - Sphere retaining valve - Google Patents

Abstract

The utility model discloses a spherical non-return valve, which comprises a valve body, a valve clack is installed in the valve body, a valve cover is connected to the upper end, the top end of the valve cover is sealed and connected with a back-stop seat, and a valve cover and the back-stop seat are provided The cross-section is arc-shaped card slot and the valve stem is installed in rotation. The valve stem is provided with a spherical non-return ring, and the spherical surface sealing connection between the stop ring and the card slot is installed. The valve body is equipped with a valve stem nut and a valve stem The lower end is screwed with it, and the upper end of the valve stem protrudes from the backstop seat and is equipped with a hand wheel. Sealing rings are used to seal the valve stem, bonnet, and backstop seat. The utility model adopts a valve stem with a spherical anti-retraction ring. The spherical surface is characterized by good neutrality. Regardless of the shape and position tolerance of each part, the reaction force of the spherical anti-retraction after assembly is always centripetal, making it more Good sealing performance.

Description

Spherical check valve

Technical field:

The utility model relates to the field of valves, in particular to a spherical check valve.

Background technique:

A kind of valve, because the valve stem is equipped with a stop device that restricts the axial movement of the valve stem, it is commonly known as a dark stem gate valve. The dark rod gate valve is widely used as a control device for pipeline fluid because it does not increase the space during operation.

The backstop of the dark stem gate valve is integrated with the valve stem or has an open ring made into a backstop part to limit the axial movement of the valve stem. In the past, the shape of the backstop was all made in a rectangular shape. Such a rectangular shape is conducive to the traditional Machining, but the shape and position tolerance requirements of each part are high. When the valve is closed, the backstop prevents the upward movement of the valve stem under the restriction of the bonnet, and at the same time produces a downward reaction force, because the general stop The shape of the retreat is rectangular. It is assumed that if the receding is skewed because of the rectangle, the reaction force will also be skewed, which will affect the sealing of the valve.

Utility model content:

The purpose of the utility model is to solve the deficiencies of the prior art and provide a spherical check valve with reasonable structure and good use effect.

The technical scheme that the utility model adopts is:

The spherical non-return valve includes a valve body, a disc is installed in the valve body, and a valve cover is connected to the upper end. The cross-section is arc-shaped card slot and the valve stem is installed in rotation. The valve stem is provided with a spherical non-return ring, and the spherical surface sealing connection between the stop ring and the card slot is installed. The valve body is equipped with a valve stem nut and a valve stem The lower end is screwed with it, and the upper end of the valve stem stretches out from the backstop seat and is equipped with a handwheel.

The spherical surface check valve is characterized in that: the valve stem, the valve cover, and the check seat are all sealed by sealing rings.

Compared with the prior art, the utility model has the beneficial effects of:

The utility model adopts a valve stem with a spherical anti-retraction ring. The spherical surface is characterized by good neutrality. Regardless of the shape and position tolerance of each part, the reaction force of the spherical anti-retraction after assembly is always centripetal, making it more Good sealing performance.

Description of drawings:

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

Fig. 2 is a partial enlarged view of A in Fig. 1 of the utility model.

detailed description:

Below in conjunction with accompanying drawing, the utility model is described in further detail by embodiment:

Spherical check valve, including valve body 1, valve disc 2 is installed in valve body 1, bonnet 3 is connected to the upper end, the top end of bonnet 3 is sealed and connected with stop seat 4, between bonnet 3 and stop seat 4 A card slot with an arc-shaped cross-section is provided and a valve stem 5 is installed in rotation. The valve stem 5 is provided with a spherical anti-retraction ring 6, and the spherical surface sealing connection between the anti-retraction ring 6 and the card slot is installed in the valve body 1. There is a valve stem nut 7, and the lower end of the valve stem 5 is screwed with it. The upper end of the valve stem 5 protrudes from the backstop seat 4 and is equipped with a hand wheel 8. O-ring seals.

The above-mentioned embodiments are only preferred implementation modes of the present utility model, in addition, the present utility model may also have other implementation modes. It should be noted that any obvious improvements and modifications shall fall within the protection scope of the present utility model without departing from the concept of the utility model.

Claims (2)

1. Spherical non-return valve, including a valve body, a valve disc is installed in the valve body, and a valve cover is connected to the upper end. There is a card slot with an arc-shaped cross section and a valve stem is installed in rotation. A spherical anti-retraction ring is provided on the valve stem, and the spherical surface sealing connection between the anti-retraction ring and the card slot is installed. The valve body is equipped with a valve stem nut, a valve The lower end of the stem is screwed with it, and the upper end of the valve stem stretches out from the backstop seat and is equipped with a handwheel. 2. The spherical check valve according to claim 1, characterized in that: the valve stem, the valve cover, and the check seat are all sealed by sealing rings.