CN218454980U

CN218454980U - Novel ball valve

Info

Publication number: CN218454980U
Application number: CN202222885425.8U
Authority: CN
Inventors: 余路捷; 张雪琴; 余成林; 周振宇
Original assignee: Richmorn Control Valves Co ltd
Current assignee: Richmorn Control Valves Co ltd
Priority date: 2022-10-31
Filing date: 2022-10-31
Publication date: 2023-02-07
Anticipated expiration: 2032-10-31

Abstract

The utility model relates to a novel ball valve that long service life, leakproofness are good. This kind of novel ball valve is including valve body, disk seat, valve rod and valve ball, and the valve ball is connected on the valve rod, and the disk seat is located the valve body with the valve ball, and the disk seat can form sealed, its characterized in that with the valve ball: the valve seat is made of stainless steel, an annular groove is formed in one surface, opposite to the valve ball, of the valve seat, a polytetrafluoroethylene ring is embedded in the annular groove of the valve seat, and the polytetrafluoroethylene ring is in sealing contact with the valve ball. The novel ball valve adopts the polytetrafluoroethylene ring as a contact surface, and adopts the stainless steel valve seat as the mounting seat of the polytetrafluoroethylene ring, so that the novel ball valve not only has good sealing performance, but also can not deform, and has longer service life.

Description

Novel ball valve

Technical Field

The utility model relates to a valve, concretely relates to ball valve.

Background

Ball valves generally include a valve body, a valve seat, a valve stem and a valve ball, the valve ball is connected to the valve stem, the valve seat and the valve ball are located in the valve body, and the valve seat and the valve ball form a sealing contact along with the rotation of the valve ball. The prior valve ball is generally made of metal material, while the valve seat can be made of metal or polytetrafluoroethylene. However, the valve seat made of metal has poor sealing performance because metal is in contact with metal (namely, hard contact); the valve seat made of polytetrafluoroethylene has good sealing performance (elastic contact), but the polytetrafluoroethylene material can deform, and the problem of sealing performance can also occur after long-term use.

Disclosure of Invention

In view of the defects existing in the prior art, the utility model discloses the innovation provides a novel ball valve that long service life, leakproofness are good.

This kind of novel ball valve is including valve body, disk seat, valve rod and valve ball, the valve ball is connected on the valve rod, the disk seat is located the valve body with the valve ball, the disk seat can form sealed, its characterized in that with the valve ball: the disk seat is stainless steel material, the one side of the relative valve ball of disk seat has the annular groove, the embedded polytetrafluoroethylene ring that has of annular groove of disk seat, polytetrafluoroethylene ring and the sealed contact of valve ball.

The inner wall of the outer ring of the annular groove of the valve seat is provided with an extension part extending inwards, and the extension part is limited on the front side of the upper end of the polytetrafluoroethylene ring.

The front side of the lower end of the polytetrafluoroethylene ring is provided with an inclined plane tangent to the cambered surface of the valve ball.

The valve seat is pressed in the valve body through the valve seat pressing cover, the valve seat pressing cover is connected to the valve body through a screw, a wave spring is arranged between the valve seat and the valve seat pressing cover, one surface of the wave spring acts on the valve seat pressing cover, and the other surface of the wave spring acts on the valve seat.

The inner wall of the valve body is provided with a limiting part for limiting the inward movement of the valve seat, and the valve seat is provided with a limiting surface which can be limited by the limiting part of the valve body to move inwards.

A packing space is formed between the valve rod and the valve body, a lower packing pad is arranged at the bottom of the packing space, an upper packing ring is arranged at the upper part of the packing space, and packing is filled between the upper packing ring and the lower packing pad.

The outer circular surface of the valve seat is provided with an annular sealing groove, an O-shaped sealing ring is arranged in the annular sealing groove, and the O-shaped sealing ring is in sealing contact with the inner wall of the valve body.

According to the utility model provides a novel ball valve owing to adopt the polytetrafluoroethylene ring as the contact surface, and adopts the stainless steel disk seat as the mount pad of polytetrafluoroethylene ring, consequently not only has good leakproofness, can not warp moreover, and life is longer.

Drawings

Fig. 1 is a cross-sectional view of the present invention;

FIG. 2 is a cross-sectional view of the valve seat;

fig. 3 is a perspective view of the wave spring.

Detailed Description

As shown in figure 1, the novel ball valve comprises a valve body 1, a valve seat 2, a valve rod 4 and a valve ball 3, wherein the valve ball 3 is connected to the valve rod 4, the valve seat 2 and the valve ball 3 are located in the valve body 1, and the valve seat 2 and the valve ball 3 can form a sealing relationship. In order to solve the deficiency that prior art exists, the utility model discloses a disk seat 2 is stainless steel material, as shown in fig. 2, has the annular groove in the relative valve ball 3's of disk seat 2 one side, and the annular groove of disk seat 2 is embedded to have polytetrafluoroethylene ring 9, this polytetrafluoroethylene ring 9 and valve ball 3 sealing contact. The polytetrafluoroethylene ring 9 can form a better sealing relationship after contacting with the valve ball 3 due to the elasticity, and the valve seat 2 is made of stainless steel materials, has stronger hardness, is not easy to deform and can support the polytetrafluoroethylene ring 9. Therefore, the valve seat 2 has the characteristic of difficult deformation and good sealing performance.

In order to prevent the polytetrafluoroethylene ring 9 from falling out of the annular groove of the valve seat 2, as shown in fig. 2, the inner wall of the outer ring of the annular groove of the valve seat 2 has an inwardly extending extension 20, and the extension 20 is limited to the front side of the upper end of the polytetrafluoroethylene ring 9. Due to the limitation of the extension part 20, the polytetrafluoroethylene ring 9 is firmly fixed in the annular groove of the valve seat 2, and the stability of the installation of the polytetrafluoroethylene ring 9 is ensured.

In order to make the polytetrafluoroethylene ring 9 contact the valve ball 3 better, as shown in fig. 2, the front side of the lower end of the polytetrafluoroethylene ring 9 has a slope 90 tangential to the arc surface of the valve ball 3. When the polytetrafluoroethylene ring 9 acts on the valve ball 3, the polytetrafluoroethylene ring 9 can deform, and the inclined surface 90 of the polytetrafluoroethylene ring 9 can be attached to the arc surface of the valve ball 3, so that a good sealing relation is formed.

As shown in fig. 1, the valve seat 2 is pressed in the valve body 1 through the valve seat cover 5, the valve seat cover 5 is connected on the valve body 1 through the screw 6, in order to make the valve seat 2 act on the valve ball 3 elastically, the utility model discloses be equipped with the wave spring 7 (as shown in fig. 3) between the valve seat 2 and the valve seat cover 5, the one side of this wave spring 7 acts on the valve seat cover 5, and the another side of the wave spring 7 acts on the valve seat 2. Because the wave spring 7 is in annular undulation, when the wave spring 7 can act on the valve seat 2 uniformly along the circumference, the valve seat 2 can be sealed with the valve ball 3 more uniformly, thereby improving the sealing performance.

In order to make the valve seat 2 move inwards to the maximum extent, as shown in fig. 1, the utility model discloses be equipped with the spacing portion 13 that limits the valve seat 2 and move inwards on the inner wall of valve body 1, as shown in fig. 2, valve seat 2 has the spacing face 22 that can be restricted by the spacing portion 13 of valve body 1 and move inwards. When the valve seat 2 moves inward, the stopper portion 13 of the valve body 1 may act on the stopper surface 22 of the valve seat 2 to restrict the valve seat 2 from moving inward again.

A packing space is formed between the valve rod 4 and the valve body 1, a lower packing pad 11 is arranged at the bottom of the packing space, an upper packing ring 12 is arranged at the upper part of the packing space, and packing 10 is filled between the upper packing ring 12 and the lower packing pad 11. The upper packing ring 12 and the lower packing 11 allow for better compression of the packing 10, resulting in a better seal between the valve stem 4 and the valve body 1.

Last, worth mentioning, the utility model discloses be equipped with annular seal groove 21 on the outer disc of disk seat 2, be equipped with O type sealing washer 8 in annular seal groove 21, this O type sealing washer 8 and valve body 2's inner wall sealing contact. The O-ring 8 provides a good seal between the valve seat 2 and the valve body 1.

Claims

1. The utility model provides a novel ball valve, including valve body (1), disk seat (2), valve rod (4) and valve ball (3), valve ball (3) are connected on valve rod (4), disk seat (2) are located valve body (1) with valve ball (3), disk seat (2) can form sealed, its characterized in that with valve ball (3): the valve seat (2) is made of stainless steel, an annular groove is formed in one surface, opposite to the valve ball (3), of the valve seat (2), a polytetrafluoroethylene ring (9) is embedded in the annular groove of the valve seat (2), and the polytetrafluoroethylene ring (9) is in sealing contact with the valve ball (3).

2. The new ball valve as claimed in claim 1, wherein: the inner wall of the outer ring of the annular groove of the valve seat (2) is provided with an extension part (20) extending inwards, and the extension part (20) is limited to the front side of the upper end of the polytetrafluoroethylene ring (9).

3. A new ball valve according to claim 1 or 2, characterized in that: the front side of the lower end of the polytetrafluoroethylene ring (9) is provided with an inclined plane (90) tangent to the cambered surface of the valve ball (3).

4. A new ball valve according to claim 1 or 2, characterized in that: disk seat (2) are pressed through disk seat gland (5) and are established in valve body (1), disk seat gland (5) are connected on valve body (1) through screw (6), be equipped with wave spring (7) between disk seat (2) and disk seat gland (5), the one side of wave spring (7) is used in disk seat gland (5), the another side of wave spring (7) is used in disk seat (2).

5. A new ball valve according to claim 1 or 2, characterized in that: the inner wall of the valve body (1) is provided with a limiting part (13) for limiting the inward movement of the valve seat (2), and the valve seat (2) is provided with a limiting surface (22) which can be limited by the limiting part (13) of the valve body (1) to move inwards.

6. A new ball valve according to claim 1 or 2, characterized in that: a packing space is arranged between the valve rod (4) and the valve body (1), a lower packing pad (11) is arranged at the bottom of the packing space, an upper packing ring (12) is arranged at the upper part of the packing space, and packing (10) is filled between the upper packing ring (12) and the lower packing pad (11).

7. A new ball valve according to claim 1 or 2, characterized in that: be equipped with annular seal groove (21) on the outer disc of disk seat (2), be equipped with O type sealing washer (8) in annular seal groove (21), O type sealing washer (8) and the inner wall sealing contact of valve body (1).