CN206889794U - A kind of Fluorine-lined ball valve - Google Patents

Abstract

A fluorine-lined ball valve. The problem that the sealing surface of the existing ball valve is prone to failure and leakage is solved. It includes a valve body, a gland, a valve seat, a ball matching the valve seat, and a valve stem connected to the ball. There is a gap between the valve body and the ball, and a medium is provided on the valve body. channel, the ball is set in the medium channel, the ball has a first position to block the medium channel during installation and a second position to make the medium channel conduction by the valve stem, the inner surface of the valve body is set There is a first corrosion-resistant layer, the outer surface of the sphere is provided with a second corrosion-resistant layer, and the outer surface of the sphere is provided with an accommodating groove for accommodating impurities or particles in the medium. The utility model allows the particles in the medium to be accommodated in the containing tank, prevents the particles from accumulating on the sealing surface, and eliminates the possibility of the particles entering the sealing pair and losing the sealing pair, so that the product has good sealing performance and greatly prolongs the service life of the product.

Description

A fluorine-lined ball valve

technical field

The utility model relates to a ball valve, in particular to a fluorine-lined ball valve.

Background technique

The ball valve (ball valve) was born in the 1950s. With the rapid development of science and technology, the continuous improvement of production technology and product structure, it has rapidly developed into a major valve category in just 40 years. In western industrially developed countries, the use of ball valves is increasing year by year. In my country, ball valves are widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal, steel and other industries, and occupy a pivotal position in the 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 valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to be rotated 90 degrees and a small rotational torque can be closed tightly. However, the existing ball valves usually have a complex structure, large volume and heavy weight, and in pipelines with relatively corrosive media, fluorine lining treatment is usually required. Since the corrosive medium contains a large amount of impurities and particles, when the ball valve is closed , the particles in the medium will accumulate on the valve seat and the sealing surface of the ball valve, making the sealing pair invalid, and there is a risk of leakage, which greatly affects the service life of the product.

Contents of the invention

In order to solve the problem that the sealing surface of the existing ball valve is prone to failure and leakage in the background technology, the utility model provides a fluorine-lined ball valve.

The technical scheme of the utility model is: a fluorine-lined ball valve, including a valve body, a gland, a valve seat, a ball adapted to the valve seat, and a valve stem connected with the ball. There is a gap, the valve body is provided with a medium channel, the ball is set in the medium channel, the ball has a first position to block the medium channel during installation and a valve stem to make the medium channel conduction. In the second position, a first corrosion-resistant layer is provided on the inner surface of the valve body, a second corrosion-resistant layer is provided on the outer surface of the sphere, and a second corrosion-resistant layer is provided on the outer surface of the sphere for containing impurities in the medium. Or particle holding tank.

As an improvement of the present utility model, the accommodating groove is arranged on the outer surface of the ball corresponding to the opening of the valve seat when the ball is in the first position.

As a further improvement of the utility model, there are two accommodating grooves, and the two accommodating grooves are arranged symmetrically with respect to the center of the sphere.

As a further improvement of the utility model, the outer surface of the sphere is inwardly recessed to form the accommodating groove.

As a further improvement of the present utility model, the second corrosion-resistant layer is arranged on the outer surface of the sphere.

As a further improvement of the utility model, the valve seat is provided with an annular gap.

As a further improvement of the utility model, the annular notch is obliquely arranged on the outer surface of the valve seat.

As a further improvement of the utility model, a packing seal is provided between the valve body and the valve stem, and a plurality of annular grooves are arranged on the packing seal, and a plurality of annular grooves are arranged on the packing seal. on the inner and outer walls.

As a further improvement of the utility model, a plurality of annular grooves are arranged alternately on the inner wall and the outer wall of the packing seal, and the annular grooves are V-shaped in section.

The beneficial effect of the utility model is that a storage tank is set on the outer surface of the sphere, so that the particles in the medium can be accommodated in the storage tank, preventing the particles from accumulating on the sealing surface, and preventing the particles from entering the sealing pair and losing the sealing performance of the sealing pair. Possibly, the sealing performance of the product is good, and the service life of the product is greatly extended. The utility model also has the advantages of simple structure, convenient assembly, reliable action and long service life.

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model embodiment.

Accompanying drawing 2 is the structure diagram when the ball 4 is in the first position.

Accompanying drawing 3 is the structural diagram when the ball 4 is in the second position.

Accompanying drawing 4 is the structural enlarged schematic diagram of I place in accompanying drawing 2.

In the figure, 1, valve body; 11, medium channel; 2, gland; 3, valve seat; 31, annular notch; 4, ball; 41, accommodating groove; 1. Corrosion-resistant layer; 8. Second corrosion-resistant layer; 9. Packing seal; 91. Annular groove.

detailed description

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

As shown in Fig. 1 in conjunction with Fig. 2-4, a fluorine-lined ball valve includes a valve body 1, a gland 2, a valve seat 3, a ball 4 matching the valve seat 3 and a valve stem 5 connected to the ball 4 , there is a gap 6 between the valve body 1 and the sphere 4, the valve body 1 is provided with a medium channel 11, the sphere 4 is set in the medium channel 11, and the sphere 4 has a The first position of blocking the medium passage 11 and the second position of the medium passage 11 being driven by the valve stem 5, the inner surface of the valve body 1 is provided with a first corrosion-resistant layer 7, the outer surface of the ball 4 The second corrosion-resistant layer 8 is provided on it, and the outer surface of the sphere 4 is provided with a holding groove 41 for containing impurities or particles in the medium. The beneficial effect of the utility model is that a storage tank is provided on the outer surface of the sphere, so that the particles in the medium can be accommodated in the storage tank, preventing the particles from accumulating on the sealing surface, and preventing the particles from entering the sealing pair and losing the sealing performance of the sealing pair. Possibly, the sealing performance of the product is good, and the service life of the product is greatly extended. The utility model also has the advantages of simple structure, convenient assembly, reliable action and long service life. The first and second corrosion-resistant layers are both fluorine-lined layers, so that the parts that the medium channel may come into contact with are all wrapped, preventing metal parts from being corroded, making the product suitable for operation under corrosive medium conditions, making the product suitable Wide range and reliable sealing. The setting of the gap reduces the friction when the ball rotates, and also plays the role of accommodating a small amount of medium in case of leakage, avoiding the medium from corroding the parts, and at the same time can accommodate the particles in the medium, so that the sealing pair is not easy to wear, and the sealing pair is sealed reliable.

The accommodating groove 41 is arranged on the outer surface of the ball 4 corresponding to the opening of the valve seat 3 when the ball 4 is in the first position. Specifically, there are two accommodating grooves 41 , and the two accommodating grooves 41 are arranged symmetrically with respect to the center of the sphere 4 . More specifically, the outer surface of the ball 4 is recessed inwardly to form the accommodating groove 41 . Such a structure is relatively simple, saves the material of the sphere, and reduces the production cost. At the same time, the accommodating tank can accommodate the particles in the medium to prevent the particles from accumulating on the sealing surface, and prevent the possibility of particles entering the sealing pair and losing the sealing pair. The product has good sealing performance, which greatly prolongs the service life of the product.

The second anti-corrosion layer 8 is attached to the outer surface of the sphere 4 . Such a structure makes the product seal reliable.

The valve seat 3 is provided with an annular notch 31 . Specifically, the annular notch 31 is obliquely arranged on the outer surface of the valve seat 3 . The setting of the annular notch makes the valve seat have a certain elastic force, so that the valve seat can be reliably pressed, and the sealing is more reliable.

A packing seal 9 is provided between the valve body 1 and the valve stem 5, and the packing seal 9 is provided with a plurality of annular grooves 91, and the plurality of annular grooves 91 are arranged on the packing seal 9. on the inner and outer walls. Specifically, a plurality of annular grooves 91 are arranged alternately on the inner wall and the outer wall of the packing seal 9, and the annular grooves 91 are V-shaped in cross section. The setting of the ring groove makes the packing seal be pressed by the packing gland, and the ring groove provides elastic force, so that the packing seal is pressed and deformed, and the sealing is more reliable, and the setting of the ring groove is convenient to provide a cavity, which can store a small amount of leakage medium or Particles in the medium, to prevent the medium from flowing out and damage the valve body and stem, and to avoid particles from damaging the sealing surface.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

Notes to all technical personnel: Although the utility model has been described according to the above-mentioned specific embodiments, the inventive idea of the utility model is not limited to this utility model, and any modification using the inventive idea will be included in the protection scope of the patent right Inside.

Claims (9)

1. A fluorine-lined ball valve, including a valve body (1), a gland (2), a valve seat (3), a ball (4) compatible with the valve seat (3) and a valve connected to the ball (4) The valve stem (5) is characterized in that: a gap (6) is provided between the valve body (1) and the ball (4), and a medium channel (11) is provided on the valve body (1), so that The ball (4) mentioned above is set in the medium passage (11), and the ball (4) has the first position of blocking the medium passage (11) when installed and is driven by the valve stem (5) so that the medium passage (11) guides In the second position of communication, the inner surface of the valve body (1) is provided with a first corrosion-resistant layer (7), and the outer surface of the ball (4) is provided with a second corrosion-resistant layer (8), so The outer surface of the sphere (4) is provided with an accommodating groove (41) for accommodating impurities or particles in the medium. 2. A fluorine-lined ball valve according to claim 1, characterized in that when the ball (4) is in the first position, the accommodating groove (41) is arranged on the ball ( 4) On the outer surface. 3. A fluorine-lined ball valve according to claim 2, characterized in that there are two accommodating grooves (41), and the two accommodating grooves (41) are arranged symmetrically with respect to the center of the sphere (4). 4. A fluorine-lined ball valve according to claim 1, 2 or 3, characterized in that the outer surface of the ball (4) is recessed inwardly to form the accommodating groove (41). 5. A fluorine-lined ball valve according to claim 1, characterized in that the second corrosion-resistant layer (8) is attached to the outer surface of the ball (4). 6. A fluorine-lined ball valve according to claim 1, characterized in that an annular notch (31) is provided on the valve seat (3). 7. A fluorine-lined ball valve according to claim 6, characterized in that said annular notch (31) is obliquely arranged on the outer surface of the valve seat (3). 8. A fluorine-lined ball valve according to claim 1, characterized in that a packing seal (9) is provided between the valve body (1) and the valve stem (5), and the packing seal ( 9) is provided with a plurality of annular grooves (91), and the plurality of annular grooves (91) are arranged on the inner and outer walls of the packing seal (9). 9. A fluorine-lined ball valve according to claim 8, characterized in that a plurality of annular grooves (91) are arranged alternately on the inner wall and outer wall of the packing seal (9), and the annular grooves (91) are V-shaped on top.