CN217355649U

CN217355649U - Sealing structure of ultralow-temperature and high-temperature fixed ball valve

Info

Publication number: CN217355649U
Application number: CN202221949688.4U
Authority: CN
Inventors: 严汉波
Original assignee: Sichuan Junhan Machinery Equipment Co ltd
Current assignee: Sichuan Junhan Machinery Equipment Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-09-02
Anticipated expiration: 2032-07-27

Abstract

The utility model relates to a ball valve sealing technique field discloses ultra-low temperature and high temperature fixed ball valve seal structure, including setting up disk seat lock ring and the position circle between valve body and spheroid, the valve body inner wall is equipped with a plurality of step faces, two adjacent radial step face butts of position circle outer wall and valve body inner wall, the disk seat lock ring sets up between spheroid and position circle and is equipped with assembly step and position circle butt, still including set up in ripple diaphragm between disk seat lock ring and the position circle. In this application position circle and valve body combine through the assembly step completion primary seal between position circle and the disk seat lock ring through two radial step face butts, and cooperation ripple diaphragm reaches better sealed effect to the increase of sealing area between position circle and the disk seat lock ring.

Description

Sealing structure of ultralow-temperature and high-temperature fixed ball valve

Technical Field

The application relates to the technical field of ball valve sealing, in particular to an ultralow-temperature and high-temperature fixed ball valve sealing structure.

Background

The ball valve is a valve which is opened or closed by using a ball body as an opening and closing member and by using the ball body to rotate around the central line of a valve body, and is mainly used for cutting off, distributing or changing the flowing direction of a medium in a pipeline. The ball body can be divided into a floating ball valve and a fixed ball valve according to the supporting mode of the ball body, wherein the ball body of the fixed ball valve is connected with the valve rod into a whole, and the ball body can freely rotate along the axis of the valve rod. The lip-shaped ring or the O-shaped ring is commonly used as a sealing element for sealing the fixed ball valve, but the lip-shaped ring is easy to deform and leak under high temperature and low temperature, the installation of the lip-shaped ring is difficult, the requirement on the machining precision is high, the forced sealing can cause the damage of a valve seat support ring or a ball body, and the torque for opening and closing is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve prior art lip or O shape sealing washer and be used for the easy problem of sealing failure of ultra-low temperature or high temperature fixed ball valve, this application provides ultra-low temperature and high temperature fixed ball valve seal structure.

In order to achieve the purpose, the technical scheme adopted by the application is as follows:

ultra-low temperature and high temperature fixed ball valve seal structure, including setting up disk seat lock ring and the position circle between valve body and spheroid, the valve body inner wall is equipped with a plurality of step faces, two adjacent radial step face butts of position circle outer wall and valve body inner wall, the disk seat lock ring sets up between spheroid and position circle and is equipped with assembly step and position circle butt, be equipped with the ripple diaphragm between disk seat lock ring and the position circle.

This scheme is for being arranged in the seal structure of ball valve, the major structure of ball valve includes valve body and spheroid, this scheme is accomplished the elementary seal to space between valve body and the spheroid with position circle and disk seat lock ring, specifically by the butt of position circle and valve body inner wall, the contact of position circle and disk seat lock ring and the completion of disk seat lock ring and spheroidal contact are sealed, worth explaining, the position circle simultaneously with two radial step face butts on the valve body inner wall, the medium is from axial application pressure in the valve body, the stability of position circle has both been strengthened, the leakproofness between position circle and the valve body has been improved again. The valve seat support ring and the positioning ring are matched through the assembling steps to increase the contact sealing of surfaces in different directions, and meanwhile, the corrugated diaphragm arranged between the valve seat support ring and the positioning ring is matched to complete further sealing.

Furthermore, the corrugated diaphragm extends towards the direction far away from the ball body and is pressed on the axial step surface of the inner wall of the valve body through the pressing ring. This scheme sets up and with its valve body inner wall contact with the position circle upside through prolonging the ripple diaphragm, blocks the medium from the valve body and position the possibility that the space flows between the circle, increases the seal area of ripple diaphragm and improves sealed effect.

Furthermore, the inner wall of the corrugated diaphragm is welded and fixed with the valve seat support ring, and the outer wall of the corrugated diaphragm is coaxial with the inner wall of the valve body.

Furthermore, the positioning ring, the valve seat support ring and the pressing ring are close to each other, and a chamfer is arranged at the position where the positioning ring, the valve seat support ring and the pressing ring are matched with the corrugated diaphragm. The structure of this scheme through improving position circle, disk seat lock ring and clamping ring improves thereby the damage that the cooperation of three and ripple diaphragm reduced ripple diaphragm, is favorable to prolonging seal structure's effective seal life.

Furthermore, a gap is arranged between the axial step surface between the inner wall of the valve body and the two radial step surfaces abutted by the positioning ring and the positioning ring, and a spring is arranged in the gap. The setting of spring can provide initial sealing power through the position circle to the disk seat lock ring, and when having the medium power, can cushion the pressure of medium to the disk seat lock ring under the sealed circumstances of assurance, reduces the inside damage of ball valve.

Furthermore, the pressure-resistant corrugated diaphragm further comprises a fastening ring matched with the pressing ring and a locking screw matched with the fastening ring in a radial direction through threads, and the pressure exerted by the pressing ring on the corrugated diaphragm is controlled by the locking screw and the fastening ring.

Furthermore, the cooperation department of the fastening ring inboard and valve body is equipped with the location step, the location step department is equipped with the open-loop with enclosing of valve body inner wall within a definite time.

The beneficial effect of this application is:

(1) the positioning ring and the valve body are abutted through two radial step surfaces to be combined between the positioning ring and the valve seat supporting ring to complete primary sealing through the assembling steps, and the corrugated diaphragm is matched to increase the sealing area between the positioning ring and the valve seat supporting ring, so that a better sealing effect is achieved.

(2) The part of the corrugated membrane, which exceeds the positioning ring and the valve seat support ring, strengthens the seal between the positioning ring and the valve body, blocks the circulation of media and further strengthens the sealing effect.

(3) The cooperation of clamping ring, clamping ring and check screw guarantees that corrugated diaphragm is compressed tightly on the valve body surface, guarantees the interdiction nature to the medium.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic structural diagram of the present application;

fig. 2 is a schematic structural diagram of a sealing structure applied to a ball valve in the present application.

In the figure: 1-a valve body; 2-a spring; 3-a positioning ring; 4-valve seat support ring; 5-sphere; 6-a lock screw; 7-ring opening; 8-a fastening ring; 9-pressing a ring; 10-a corrugated membrane; 11-valve stem.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, as generally described and illustrated in the figures herein, could be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between descriptions and not necessarily for describing or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

Example 1:

as shown in fig. 1, the sealing structure of the ultra-low temperature and high temperature fixed ball valve comprises a valve seat support ring 4 and a locating ring 3 which are arranged between a valve body 1 and a ball body 5, wherein the inner wall of the valve body 1 is provided with a plurality of step faces, the outer wall of the locating ring 3 is abutted against two adjacent radial step faces of the inner wall of the valve body 1, the valve seat support ring 4 is arranged between the ball body 5 and the locating ring 3 and is provided with an assembling step and 3 abutted against the locating ring, and a corrugated diaphragm 10 is arranged between the valve seat support ring 4 and the locating ring 3.

The working principle is as follows:

the valve body 1 is the major structure of fixed ball valve, and spheroid 5 is the opening and closing piece that is located valve body 1 inside, and this embodiment is for utilizing valve seat backing ring 4, position circle 3 and ripple diaphragm 10 to realize the sealed between spheroid 5 and the valve body 1 better, prevents that the medium from leaking between spheroid 5 and the valve body 1 inner wall. Fig. 2 is a schematic sectional view of a fixed ball valve, and fig. 1 is a partially enlarged view of a portion of the ball valve of fig. 2 where a sealing structure is provided, that is, a schematic view of the sealing structure in the present application. Primary seal in this application relies on the cooperation of disk seat lock ring 4 and position circle 3 and the cooperation of position circle 3 and valve body 1 to accomplish, and is concrete, and 1 inner wall of valve body sets up the step face, has radial surface and axial surface in the step face, and position circle 3 and two adjacent radial step face butt wherein to guarantee the primary seal between

position circle

3 and 1 inner wall of valve body through two butt departments. The contact between the positioning step on the valve seat support ring 4 and the positioning ring 3 ensures primary sealing between the valve seat support ring 4 and the positioning ring 3 by utilizing the resistance of the positioning step for increasing the liquid passing. It should be noted that the adjacent radial step surfaces are not physically adjacent, but two radial step surfaces that are simultaneously continuous with one axial step surface. The corrugated diaphragm 10 plays a role in strengthening sealing on the basis of primary sealing, and particularly, the elasticity of the material of the corrugated diaphragm 10 is utilized to improve the sealing property between the valve seat support ring 4 and the positioning ring 3.

It is to be noted that the radial direction and the axial direction described in the present application are standard directions with reference to the axial direction and the radial direction of the valve stem 11, for example, the radial direction of the radial step surface coincides with the radial direction of the valve stem 11, and the normal direction of the radial step surface is parallel to the axis of the valve stem 11. In addition, the corrugated diaphragm 10 described in the present application is not identical to the existing disc-shaped corrugated diaphragm 10 according to the three-dimensional structure of the ball valve, but refers to a sealing member having a cylindrical overall shape and having corrugations on the outer wall or/and inner wall, which is made of the raw materials commonly used in the existing elastic sealing members.

Example 2:

this example is further optimized and defined based on example 1.

As shown in fig. 1, the corrugated diaphragm 10 extends away from the ball 5 and is pressed against an axial step surface of the inner wall of the valve body 1 by the pressing ring 9. In embodiment 1, the corrugated diaphragm 10 contacts with the valve seat support ring 4 and the locating ring 3 simultaneously to avoid the leakage of liquid through the gap between the valve seat support ring 4 and the locating ring 3, according to the orientation shown in fig. 1, the corrugated diaphragm 10 in this embodiment extends upward and then is higher than the locating ring 3, and the contact between the extending part and the inner wall of the valve body 1 can further block the leakage of liquid from the gap between the outer wall of the locating ring 3 and the inner wall of the valve body 1, thereby further improving the sealing effect of the sealing structure in this application.

In the present embodiment, preferably, the inner wall of the corrugated diaphragm 10 is welded and fixed to the valve seat support ring 4. The welding can eliminate the possibility of sealing leakage at the contact part between the corrugated diaphragm 10 and the valve seat support ring 4, and the reliable connection of the welding enables the corrugated diaphragm 10 to slightly move along with the valve seat support ring 4, so that the damage and the failure are not easy to occur, and the service life of the corrugated diaphragm can be prolonged.

In this embodiment, it is further preferred that the outer wall of the corrugated diaphragm 10 is coaxial with the inner wall of the valve body 1. It should be noted that the significance of the coaxial arrangement of the outer wall of the corrugated diaphragm 10 and the inner wall of the valve body 1 is to reduce the left-right deviation of the corrugated diaphragm 10 after being pressed. And when the corrugated diaphragm 10 is not welded with the valve seat support ring 4, the dismounting and reinstalling of the corrugated diaphragm 10 is not easy to cause damage, and the coaxial homing is convenient.

Example 3:

in this embodiment, further optimization and limitation are performed on the basis of embodiment 2.

The positioning ring 3, the valve seat support ring 4 and the pressing ring 9 are close to each other, and a chamfer is arranged at the matching part of the positioning ring, the valve seat support ring and the pressing ring with the corrugated diaphragm 10. The chamfer angle on the positioning ring 3 can support the original deformation of the corrugated diaphragm 10, and the chamfer angles on the pressing ring 9 and the valve seat support ring 4 can support the medium thrust deformation of the corrugated diaphragm 10, so that the damage of a common diaphragm caused by acute angles and deformation is avoided.

Example 4:

this example is further optimized and defined based on example 3.

A gap is arranged between the axial step surface between the two radial step surfaces abutted against the inner wall of the valve body 1 and the positioning ring 3, and a spring 2 is arranged in the gap. When there is no medium power, the valve seat support ring 4 is sealed with the initial force that spheroid 5 provided by spring 2, at this moment the switch is light, and when there is medium power, medium power can promote ripple diaphragm 10, then the effort is to the valve seat support ring 4, continue to increase medium power, then the power increase of acting on the valve seat support ring 4, and ripple diaphragm 10 makes the power of acting on the valve seat support ring 4 reach the definite value and will not increase again, thereby it is lighter when taking the pressure switch action, also can reduce the too big damage that brings of moment of torsion, the life of ball valve has been guaranteed more. In addition, the spring 2 can provide enough initial sealing force, force is transmitted to the valve seat support ring 4 through the positioning ring 3, the valve seat support ring 4 is tightly pressed on the ball body 5, and a good sealing effect can be achieved under the condition of low pressure.

Example 4:

this example is further optimized and defined based on example 3.

The device also comprises a fastening ring 8 matched with the pressing ring 9 and a locking screw 6 matched with the fastening ring 8 in a radial direction through threads, wherein the locking screw 6 is matched with the fastening ring 8 to control the pressure applied by the pressing ring 9 to the corrugated diaphragm 10. The clamping ring 9 is used for compressing the corrugated diaphragm 10, and the cooperation of the locking screw 6 and the fastening ring 8 in the embodiment achieves the effect of artificially adjusting the compression force, and the locking screw 6 is screwed on the fastening ring 8 to achieve the required torque value, so that the force can be transmitted to the corrugated diaphragm 10 through the clamping ring 9.

Preferred in this embodiment, in order to guarantee that rotatory locking screw 6 back retainer ring 8 atress is even relatively and do not produce irregular deformation, retainer ring 8 inboard is equipped with the location step with valve body 1's cooperation department, location step department and valve body 1 inner wall enclose be equipped with ring-opening 7 in the closed range to half card of ring-opening 7 is at valve body 1's inner wall, and on the location step of retainer ring 8, the stability of retainer ring 8 in valve body 1 of improvement retainer ring 8.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Ultra-low temperature and high temperature fixed ball valve seal structure, including setting up disk seat lock ring (4) and position circle (3) between valve body (1) and spheroid (5), its characterized in that: the valve body (1) inner wall is equipped with a plurality of step faces, two adjacent radial step face butts of position circle (3) outer wall and valve body (1) inner wall, valve seat lock ring (4) set up between spheroid (5) and position circle (3) and are equipped with assembly step and position circle (3) butt, be equipped with ripple diaphragm (10) between valve seat lock ring (4) and position circle (3).

2. The ultra-low temperature and high temperature fixed ball valve sealing structure of claim 1, wherein: the corrugated diaphragm (10) extends towards the direction far away from the ball body (5) and is pressed on the axial step surface of the inner wall of the valve body (1) through the pressing ring (9).

3. The ultra-low temperature and high temperature fixed ball valve sealing structure of claim 2, wherein: the inner wall of the corrugated diaphragm (10) is welded and fixed with the valve seat support ring (4).

4. The ultra-low temperature and high temperature fixed ball valve sealing structure according to any one of claims 2 or 3, wherein: the outer wall of the corrugated diaphragm (10) is coaxial with the inner wall of the valve body (1).

5. The ultra-low temperature and high temperature fixed ball valve sealing structure of claim 4, wherein: the positioning ring (3), the valve seat support ring (4) and the pressing ring (9) are close to each other, and a chamfer is arranged at the position where the positioning ring, the valve seat support ring and the pressing ring are matched with the corrugated diaphragm (10).

6. The ultra-low temperature and high temperature fixed ball valve sealing structure of claim 4, wherein: a gap is arranged between the axial step surface between the two radial step surfaces abutted against the inner wall of the valve body (1) and the positioning ring (3), and a spring (2) is arranged in the gap.

7. The ultra-low temperature and high temperature fixed ball valve sealing structure of claim 4, wherein: the device also comprises a fastening ring (8) matched with the pressing ring (9) and a locking screw (6) which is matched with the fastening ring (8) along the radial direction through threads, wherein the locking screw (6) is matched with the fastening ring (8) to control the pressure applied to the corrugated diaphragm (10) by the pressing ring (9).

8. The ultra-low temperature and high temperature fixed ball valve seal structure of claim 7, wherein: the inboard cooperation department with valve body (1) of tight loop (8) is equipped with the location step, location step department and valve body (1) inner wall enclose to be equipped with open-loop (7) within a definite time.