CN219888786U

CN219888786U - Axial sealing floating ball valve

Info

Publication number: CN219888786U
Application number: CN202321456984.5U
Authority: CN
Inventors: 余斌
Original assignee: Zhejiang Chenghai Valve Co ltd
Current assignee: Zhejiang Chenghai Valve Co ltd
Priority date: 2023-06-08
Filing date: 2023-06-08
Publication date: 2023-10-24
Anticipated expiration: 2033-06-08

Abstract

The utility model relates to the field of ball valves, in particular to an axial sealing floating ball valve, which comprises: the valve body is internally provided with a cavity and a medium channel, and the cavity is communicated with the medium channel; the sphere is rotatably arranged in the cavity, and a through hole communicated with the medium channel is formed in the sphere; the valve rod is connected with the ball body, the inner diameter of the upper end of the valve rod is smaller than that of the lower end, and the inner diameter change part is a middle end surface; the floating valve seat is arranged on the outer side of the sphere; an elastic element disposed between the floating valve seat and the valve body; the sealing cover is sleeved on the periphery of the valve rod and is connected with the valve body; the first sealing gasket is arranged between the sealing cover and the valve body, a part of the first sealing gasket is arranged on the middle end face of the valve rod, and the ball valve achieves the technical effect that the floating ball valve has better axial sealing effect.

Description

Axial sealing floating ball valve

Technical Field

The utility model relates to the field of ball valves, in particular to an axial sealing floating ball valve.

Background

The ball valve is one kind of valve, and the opening and closing part (ball) of the ball valve is driven by the valve rod and rotates around the axis of the ball valve. The ball valve can also be used for regulating and controlling fluid, along with the rapid development of science and technology, the continuous improvement of production process and product structure rapidly develops into a main valve, and in China, the ball valve is widely applied to industries such as petroleum refining, long-distance pipeline, chemical industry, papermaking, pharmacy, water conservancy, electric power, municipal administration, steel and the like, and plays a role in national economy. It has the action of rotating 90 degrees, the cock body is a sphere with a circular through hole or channel passing through its axis. The ball of the floating ball valve swings to cause the valve rod to swing, so that a gap is generated between the valve rod and the valve body, and the axial sealing performance of the valve rod is poor.

Accordingly, there is an urgent need to provide an improved solution to the above technical problems.

Disclosure of Invention

The utility model aims to solve the technical problems, and provides an axial sealing floating ball valve, which achieves the technical effect that the floating ball valve has better axial sealing effect.

In view of this, the present utility model provides an axially sealed floating ball valve, characterized by comprising:

the valve body is internally provided with a cavity and a medium channel, and the cavity is communicated with the medium channel;

the sphere is rotatably arranged in the cavity, and a through hole communicated with the medium channel is formed in the sphere;

the valve rod is connected with the ball body, the inner diameter of the upper end of the valve rod is smaller than that of the lower end, and the inner diameter change part is a middle end surface;

the floating valve seat is arranged on the outer side of the sphere;

an elastic element disposed between the floating valve seat and the valve body;

the sealing cover is sleeved on the periphery of the valve rod and is connected with the valve body;

and the first sealing gasket is arranged between the sealing cover and the valve body, and a part of the first sealing gasket is arranged on the middle end surface of the valve rod.

Further, the method further comprises the following steps:

a second gasket disposed between the cover and the valve stem;

the ejector block is arranged in front of the sealing cover and the valve rod and is pressed on the second sealing gasket.

Further, the first gasket is provided in a stepped shape.

Further, the contact surface of the second sealing gasket and the top block is provided with an inclined surface.

Further, the method further comprises the following steps:

the fixed piece is arranged between the elastic element and the floating valve seat and is detachably connected with the floating valve seat.

Further, the floating valve seat further comprises:

and the wear-resistant part is arranged in the end face attached between the floating valve seat and the ball body.

Further, the wear part further includes:

and the fastening part is arranged on the outer peripheral wall and the inner peripheral wall of the wear-resistant part.

Further, when the ball valve is in a closed state, the valve rod and the ball body can slide, and the valve rod and the ball body are in a fixed state in the axial direction.

Further, a sealing ring is arranged between the floating valve seat and the valve body.

The beneficial effects of the utility model are as follows:

1. the first sealing gasket provided by the utility model has better axial sealing performance.

2. The fixing piece can enable the elastic element to be more convenient to correspond to the installation position, is convenient for the elastic element to be detached, and saves cost.

3. The wear-resistant part provided by the utility model enables the service life of the floating ball valve to be longer.

Drawings

FIG. 1 is a schematic cross-sectional view of the present utility model;

FIG. 2 is a schematic perspective view of the present utility model;

FIG. 3 is a schematic view of the structure of the area A in FIG. 1;

FIG. 4 is a schematic view of the structure of the region B in FIG. 1;

fig. 5 is a schematic view showing the mounting structure of the valve stem and the ball in embodiment 3.

The label in the figure is:

1. a valve body; 2. a sphere; 3. a valve stem; 4. a floating valve seat; 5. an elastic element; 6. a cover; 7. a first gasket; 8. a second gasket; 9. a top block; 10. a fixing piece; 11. a wear-resistant portion; 12. a fastening part; 13. a seal ring; 14. a through hole; 15. a media channel; 16. the handle is rotated.

Detailed Description

The technical solutions of the embodiments of the present utility model will be clearly described below with reference to the drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which are obtained by a person skilled in the art based on the embodiments of the present utility model, fall within the scope of protection of the present utility model.

Example 1:

the present embodiment provides an axially sealed floating ball valve comprising:

the valve body 1, there are cavity and medium channel 15 in the valve body 1, the cavity communicates with medium channel 15;

the sphere 2 is rotatably arranged in the cavity, and a through hole 14 communicated with the medium channel 15 is arranged in the sphere 2;

the valve rod 3 is connected with the ball body 2, and the inner diameter of the upper end of the valve rod 3 is smaller than that of the lower end;

a floating valve seat 4, the floating valve seat 4 being arranged outside the sphere 2;

the sealing cover 6 is sleeved on the periphery of the valve rod 3 and is connected with the valve body 1;

a first packing 7, the first packing 7 being provided between the cover 6 and the valve body 1, and a part of the first packing 7 being provided on the intermediate end face of the valve stem 3;

a second gasket 8, the second gasket 8 being disposed between the cap 6 and the valve stem 3;

the top block 9, the top block 9 is arranged before the sealing cover 6 and the valve rod 3, and is pressed on the second sealing gasket 8.

In this embodiment, the valve body 1 is divided into two parts, namely a first valve body 1 and a second valve body 1, the first valve body 1 is provided with a cavity, one end of the first valve body 1 is a water receiving port and can be a water inlet or a water outlet, the type of the interface is determined according to practical use, the other end of the first valve body 1 is one end of the installation sphere 2, the inner diameter of the opening is required to be larger than the outer diameter of the sphere 2, the installation sphere 2 is convenient, the second valve body 1 is provided with another interface end, and the second valve body 1 can be connected with one end of the installation sphere 2 of the first valve body 1, the contact ends of the first valve body 1 and the second valve body 1 are provided with large-caliber flanges, the flange connection is used for making the connection more stable, a sealing gasket is arranged between the two flanges, the sealing gasket is made of rubber, half-concave holes are additionally arranged on the sealing gasket, the depth is smaller than the thickness of the sealing gasket, the half-concave holes arranged at the two end surfaces of the sealing gasket are uniformly arranged, namely that all the half-concave holes arranged at the two ends are not on the same axis, the two sealing gaskets can be increased in size, and the sealing gasket can be deformed better; the ball body 2 is made of stainless steel, a rectangular chute is formed on the upper surface of the ball body 2, the lower end of the valve rod 3 is a sliding block in clearance fit with the chute, when the ball valve is closed, the ball body 2 can slide left and right in a small range in a cavity, when fluid impacts the ball body 2, impact force of the fluid can be buffered, the floating valve seat 4 is arranged on two sides of the ball body 2, the floating valve seat 4 can be tightly attached to the ball body 2 and used for fixing the installation position of the ball body 2, the floating valve seat 4 can slide in the cavity together with the ball body 2, an elastic element 5 is arranged between the floating valve seat 4 and the valve body 1, the elastic element 5 is a spring, the spring is welded on the floating valve seat 4, the spring is inserted into a reserved hole in the valve body 1, one part of the spring is arranged outside the hole, the other part of the spring is arranged outside the hole, one end outside the hole can buffer the impact force of the floating valve seat 4, the effect of protecting the floating valve seat 4 is achieved, the floating valve seat 4 can be always attached to the ball body 2, and part of the spring inside the hole can be fixed in position, and positioning and tight installation is facilitated.

The upper end of the valve body 1 is provided with the sealing cover 6, the sealing cover 6 is sleeved on the periphery of the valve rod 3, the sealing cover 6 can be fixed on the valve body 1 by using screws, a first sealing gasket 7 is arranged between the sealing cover 6 and the valve body 1, one part of the sealing gasket is arranged on the upper end face of the valve body 1, the other part of the sealing gasket is arranged on the middle end face of the valve rod 3 and is pressed on the first sealing gasket 7 by the sealing cover 6, the first sealing gasket 7 can seal a gap between the valve rod 3 and the valve body 1, and the first sealing gasket 7 is arranged on the middle end face of the valve rod 3 and the valve body 1, so that the sealing contact area is larger, and the axial sealing performance is better by using surface sealing.

The rotary handle 16 is arranged at the uppermost part of the valve rod 3 and used for opening and closing the ball valve, two nuts are arranged below the rotary handle 16, gaskets are arranged between the nuts to prevent the rotary handle 16 from being loose due to use, the nuts can fasten the rotary handle 16, friction between the nuts can be reduced by the gaskets, and the service life of the nuts is prolonged.

Example 2:

the present embodiment provides an axial seal floating ball valve having the following technical features in addition to the technical scheme including the above embodiment.

Further comprises:

The sealing device is characterized in that a gap is formed between the sealing cover 6 and the valve rod 3, a second sealing gasket 8 is arranged in the gap, the second sealing gasket 8 is in interference fit with the sealing cover 6 and the valve rod 3, sealing performance between the sealing cover 6 and the valve rod 3 is better, a top block 9 is arranged at the upper end of the second sealing gasket 8, a nut on the valve rod 3 is used for pressing the top block 9, the top block 9 is pressed on the second sealing gasket 8 while the top block 9 is fixed, and the contact area between the second sealing gasket 8 and the sealing cover 6 and the valve rod 3 is larger, so that sealing performance is better.

The first gasket 7 is provided in a stepped shape.

The middle end face of the valve rod 3 is higher than the upper end face of the valve body 1, so that the first sealing gasket 7 is in a stepped shape with a high inner ring and a low outer ring, and the structure can enable the contact area between the first sealing gasket 7 and the valve rod 3 as well as between the first sealing gasket 7 and the sealing cover 6 to be larger, so that the sealing effect is better.

The contact surface of the second sealing gasket 8 and the top block 9 is provided with an inclined surface.

The contact surface of the second sealing gasket 8 and the top block 9 is an inclined surface, the inner side of the inclined surface close to the valve rod 3 is a high side, and the outer side of the inclined surface is a low side, when the top block 9 presses the second sealing gasket 8, the inclined surface enables the second sealing gasket 8 to be close to one side of the valve rod 3 preferentially, and when the valve rod 3 rotates, the second sealing gasket 8 is always close to the valve rod 3, so that the sealing performance of the ball valve is better.

Further comprises:

the fixing piece 10, the fixing piece 10 is set up between elastic element 5 and floating valve seat 4, and connect with floating valve seat 4 removably.

The fixing piece 10 is welded on the spring, the axis of the spring is vertical to the fixing piece 10, the shape of the fixing piece 10 is not limited, a hole is formed in the middle of the fixing piece 10, a screw can be installed in the hole, the fixing piece 10 is installed on the floating valve seat 4, and for welding installation, the fixing piece 10 is added to enable the spring to be vertical to the end face of the floating valve seat 4, so that the corresponding installation position is convenient; and when the floating valve seat 4 is seriously worn and needs to be replaced, the spring can be detached, so that the cost is saved.

Example 3:

The floating valve seat 4 further includes:

and the wear-resistant part 11, wherein the wear-resistant part 11 is arranged in the joint end surface between the floating valve seat 4 and the ball body 2.

The wear-resistant part 11 is arranged on the contact end surface of the floating valve seat 4 and the ball body 2, and can be in adhesive connection, or can be fixed in the end surface by the pressure of the floating valve seat 4, and the wear-resistant part 11 is made of ceramics, so that the service life of the floating valve seat 4 can be prolonged.

The wear-resistant portion 11 further includes:

and a fastening portion 12, the fastening portion 12 being provided on the outer peripheral wall and the inner peripheral wall of the wear-resistant portion 11.

When the wear-resistant part 11 is pressed on the ball body 2 only by means of pressure, a small-sized bulge can be arranged on the end face of the wear-resistant part 11, which is in contact with the floating valve seat 4, and a groove matched with the bulge is arranged on the floating valve seat 4, so that the installation structure of the wear-resistant part 11 and the floating valve seat 4 is more stable.

When the ball valve is in a closed state, the valve rod 3 and the ball body 2 can slide, and the valve rod 3 and the ball body 2 are in a fixed state in the axial direction.

The two sides of the lower end of the valve rod 3 are also provided with grooves, the upper end face of the sphere 2 is provided with grooves with the same cross section as the lower end of the valve rod 3, so that the sphere 2 can slide at the lower end of the valve rod 3, and meanwhile, the sphere 2 is immovable in the axial direction of the valve rod 3, so that the whole structure is more stable.

The flange can also be arranged at two ends of the ball valve and used for conveniently connecting the pipeline, and the rubber ring is arranged on the end face of the flange, so that the sealing performance is enhanced and the leakage of fluid is prevented when the flange is connected to the pipeline.

A sealing ring 13 is provided between the floating valve seat 4 and the valve body 1.

The sealing ring 13 is arranged between the floating valve seat 4 and the valve body 1, so that the sealing performance between the floating valve seat 4 and the valve body 1 is better.

The embodiments of the present utility model and the features of the embodiments are described above with reference to the accompanying drawings, in which the embodiments of the present utility model and the features of the embodiments may be combined with each other without conflict, and the present utility model is not limited to the above-described embodiments, which are merely illustrative, not restrictive, of the present utility model, and many forms may be made by those of ordinary skill in the art without departing from the spirit of the present utility model and the scope of the claims, which are also included in the scope of the present utility model.

Claims

1. An axially sealed floating ball valve, comprising:

the valve body (1), there are cavity and medium channel (15) in the valve body (1), the cavity communicates with medium channel (15);

the sphere (2) is rotatably arranged in the cavity, and a through hole (14) communicated with the medium channel (15) is formed in the sphere (2);

the valve rod (3), the valve rod (3) is connected with the sphere (2), the inner diameter of the upper end of the valve rod (3) is smaller than that of the lower end, and the inner diameter change part is a middle end face;

a floating valve seat (4), wherein the floating valve seat (4) is arranged outside the sphere (2);

an elastic element (5), the elastic element (5) is arranged between the floating valve seat (4) and the valve body (1);

the sealing cover (6) is sleeved on the periphery of the valve rod (3) and is connected with the valve body (1);

and a first sealing gasket (7), wherein the first sealing gasket (7) is arranged between the sealing cover (6) and the valve body (1), and a part of the first sealing gasket (7) is arranged on the middle end surface of the valve rod (3).

2. The axially sealed floating ball valve of claim 1, further comprising:

a second gasket (8), the second gasket (8) being arranged between the closure cap (6) and the valve stem (3);

the top block (9), the top block (9) is arranged in front of the sealing cover (6) and the valve rod (3), and is pressed on the second sealing gasket (8).

3. An axially sealed floating ball valve according to claim 1, characterized in that the first gasket (7) is provided in a stepped shape.

4. An axially sealed floating ball valve according to claim 2, characterized in that the contact surface of the second gasket (8) with the top piece (9) is provided as a bevel.

5. The axially sealed floating ball valve of claim 1, further comprising:

the fixing piece (10), the fixing piece (10) is arranged between the elastic element (5) and the floating valve seat (4) and is detachably connected with the floating valve seat (4).

6. An axially sealed floating ball valve according to claim 1, characterized in that the floating valve seat (4) further comprises:

and the wear-resistant part (11), and the wear-resistant part (11) is arranged in the end surface attached between the floating valve seat (4) and the ball body (2).

7. An axially sealed floating ball valve according to claim 6, wherein the wear-resistant portion (11) further comprises:

and a fastening portion (12), wherein the fastening portion (12) is provided on the outer peripheral wall and the inner peripheral wall of the wear-resistant portion (11).

8. An axially sealed floating ball valve according to claim 1, characterized in that, in the closed state of the ball valve, the valve stem (3) is slidable with the ball (2), and the valve stem (3) and the ball (2) are axially fixed.

9. An axially sealed floating ball valve according to claim 1, characterized in that a sealing ring (13) is provided between the floating valve seat (4) and the valve body (1).