CN204459243U - A kind of intelligent breathing ball valve - Google Patents

Abstract

The utility model provides a kind of intelligent breathing ball valve, comprise valve body, spheroid and handle, valve body comprises left valve barrel and right valve barrel, left valve barrel is fixedly connected with right valve barrel, is also provided with spheroid between left valve barrel and right valve barrel, the surface of contact of left valve barrel, right valve barrel and spheroid also comprises seal serving as a contrast, sealing lining is arranged on foam body, foam body is fixedly connected with valve body, and the top of valve body is also fixing is provided with valve rod, and the top of valve rod is also provided with the handle of valve rod.The utility model can the sealing block of intelligent breathing by being replaced by by common seal ring.Sealing block is made up of PTFE sealing lining and PTFE cavernosa material compound.When ball valve closed condition, valve downstream pressure medium is relatively high.Medium infiltrates in foam body pore and foam body volume is swollen, and to increase the pressure of sealing surface, strengthens sealing effect.

Description

An intelligent expansion and contraction ball valve

technical field

The utility model belongs to the technical field of valve equipment, in particular to an intelligent expansion and contraction ball valve.

Background technique

At present, the ball valve is mainly used in the pipeline to cut off, distribute and cover the flow direction of the medium. The ball valve has small fluid resistance, simple structure, the sealing surface of the ball and the valve seat is isolated from the medium, the channel is smooth and flat, and it is not easy to deposit the medium. It is not only suitable for general working medium, but also suitable for medium with harsh working conditions. It has been widely used. In petroleum, chemical industry, power generation, papermaking, atomic energy, aviation, rocket and other fields, as well as in people's daily life.

The valve body of the ball valve can be integral or combined. In the prior art, fixed ball valves are used in high-pressure and large-diameter environments. The upper and lower shafts of the ball valve are fixed on the sphere, so the sphere is also fixed and does not move after being pressurized. It is used in high-pressure and large-diameter environments. Since the fixed ball and ball valves all have floating valve seats, the valve seat moves after being subjected to medium pressure or spring action, so that the sealing ring is pressed tightly on the ball to ensure sealing, but the ball is fixed, and the valve seat is always tight. Press on the sphere. Therefore, there is always the problem of wear on the sealing surface of the valve seat and the ball, and the service life is short, and the switching process is a dynamic sealing process. The dynamic force of the valve seat is likely to cause uneven sealing and leakage of the outlet, and the sealing reliability is poor; in the use of medium and low pressure small diameter The environment uses a floating ball valve. The ball of the ball valve is floating. Under the action of the medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet end to ensure the seal of the outlet end. Although the sealing performance of the floating ball valve is good, the load of the working medium on the ball is completely transmitted to the outlet sealing ring, so the sealing ring at the outlet end is subjected to the working load of the medium, which is only suitable for the environment of medium and low pressure and small diameter, and the ball is floating. While the valve stem is fixed, during the opening process, due to the deviation between the ball and the axis of the valve stem, an additional operating torque is generated, which increases the operating torque.

Utility model content

The problem to be solved by the utility model is to overcome the problems of the prior art and provide a ball valve suitable for various occasions and having a good sealing effect.

In order to solve the above technical problems, the technical solution adopted by the utility model is: an intelligent expansion and contraction ball valve, including a valve body, a ball and a handle, the valve body includes a left valve body and a right valve body, and the left valve body and the right valve body are fixedly connected , a ball is also arranged between the left valve body and the right valve body, and the contact surfaces of the left valve body, the right valve body and the ball also include a sealing liner, the sealing liner is arranged on the sponge, and the sponge The body is fixedly connected with the valve body, and the top of the valve body is also fixedly provided with a valve stem, and the top of the valve stem is also provided with a handle of the valve stem.

Specifically, the left valve body and the right valve body are respectively provided with sealing grooves for setting sealing blocks. The shape of the sealing grooves is a groove arranged along the circumference. The cross-sectional shape of the sealing grooves is rectangular. The sponge The body matches the seal groove.

Specifically, the left valve body is also provided with a valve body connection, the valve body connection is also provided with a valve stem hole, the valve stem is arranged in the valve stem hole, and the valve stem hole is also provided with a The packing is fixed by the packing gland.

Specifically, a hexagonal connection surface is provided on the top of the valve stem, and a handle is also provided on the hexagonal connection surface.

The utility model has the advantages and positive effects: an intelligent expansion and contraction ball valve, by replacing the ordinary sealing ring with a sealing block capable of intelligent expansion and contraction. The sealing block is made of PTFE sealing lining and PTFE sponge material. When the ball valve is closed, the medium pressure upstream of the valve is relatively high. The medium penetrates into the capillary pores of the sponge body to expand the volume of the sponge body to increase the pressure on the sealing surface and enhance the sealing effect. When the valve is open, the pressure of the medium upstream of the valve decreases, and a part of the medium pressed into the capillary pores of the sponge body will be squeezed out, which will reduce the volume of the sponge body, thereby reducing the pressure on the sealing surface. In this way, the torque of the valve can be reduced, and the wear of the sealing ring can also be slowed down, thereby prolonging the service life of the valve.

Description of drawings

Figure 1 is a schematic diagram of the overall assembly structure of an intelligent expansion and contraction ball valve

Among the figure: 1 left valve body, 2 right valve body, 3 sphere, 4 sponge body, 5 sealing lining, 6 valve stem, 7 handle.

Detailed ways

Specific embodiments of the present utility model are described in detail below in conjunction with accompanying drawings.

An intelligent expansion-contraction ball valve includes a valve body, a ball 3 and a handle 7. The valve body also includes a left valve body 1 and a right valve body 2. There is also a valve body connection under the left valve body 1. The valve body connection is a part for setting the sphere 3. The valve core 6 is a cylinder with a Spherical structure of holes. A valve body sealing ring is also arranged on the connecting surface of the left valve body 1 and the right valve body 2 . A valve stem 6 is also arranged on the top of the sphere 3, and the valve stem 6 is fixedly connected in the sphere 3, and the valve stem 6 passes through the valve stem hole at the joint of the valve body. A retaining ring is also arranged in the valve stem hole at the connection of the valve body, and the retaining ring is used for radially positioning the valve stem. In order to cooperate with the radial positioning of the valve stem hole, a retaining ring is also arranged on the valve stem under the retaining ring, and the diameter of the retaining ring is the same as that of the valve stem hole. A valve stem sealing ring is also arranged between the retaining ring and the retaining ring, thereby sealing the valve stem 6 and the external space. At the same time, there is a slight radial movement between the valve stem 6 and the connection of the valve body, thereby reducing the manufacturing accuracy of the ball 3, the valve stem 6, and the connection of the valve body. A packing is also arranged between the valve stem 6 on the back-up ring and the joint of the valve body, and a packing gland passing through the valve stem 6 is also arranged on the packing. The packing gland is used to fix and seal the packing, thereby sealing the valve body. A hexagonal part is also arranged on the top of the valve stem 6, and a handle 7 is also arranged on the hexagonal part, so as to drive the valve stem 6 to rotate.

The left valve body 1 and the right valve body 2 are respectively provided with sealing grooves, on which the sponge body 4 is arranged, and a sealing lining 5 in contact with the sphere 3 is arranged outside the sponge body 4 . When the medium penetrates into the capillary pores of the sponge body 4, the volume of the sponge body 4 expands to increase the pressure on the sealing surface and enhance the sealing effect. When the valve is opened, the pressure of the medium upstream of the valve decreases, and a part of the medium pressed into the capillary pores of the sponge body 4 will be squeezed out, so that the volume of the sponge body 4 is reduced, thereby reducing the pressure on the sealing surface. In this way, the torque of the valve can be reduced, and the wear of the sealing ring can also be slowed down, thereby prolonging the service life of the valve.

An embodiment of the present utility model has been described in detail above, but the content described is only a preferred embodiment of the present utility model, and cannot be considered as limiting the implementation scope of the present utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (4)

1. an intelligent breathing ball valve, comprise valve body, spheroid and handle, it is characterized in that: described valve body comprises left valve barrel and right valve barrel, left valve barrel is fixedly connected with right valve barrel, also spheroid is provided with between described left valve barrel and right valve barrel, the surface of contact of described left valve barrel, right valve barrel and spheroid also comprises seal and serve as a contrast, described sealing lining is arranged on foam body, described foam body is fixedly connected with valve body, the top of described valve body is also fixing is provided with valve rod, and the top of described valve rod is also provided with the handle of valve rod.

2. the intelligent breathing ball valve of one according to claim 1, it is characterized in that: described left valve barrel and right valve barrel are also respectively arranged with the seal groove for arranging sealing block, the shape of described seal groove is the groove circumferentially arranged, the sectional shape of seal groove is rectangle, and described foam body and seal groove match.

3. the intelligent breathing ball valve of one according to claim 1, it is characterized in that: described left valve barrel is also provided with valve body joint, described valve body joint is also provided with valve rod hole, described valve rod is arranged in valve rod hole, also be provided with filler in described valve rod hole, described filler is fixed by Gland.

4. the intelligent breathing ball valve of one according to claim 3, is characterized in that: the top of described valve rod is provided with hexagonal junction surface, described hexagonal junction surface is also provided with handle.