UA47900C2 - Sphere tap - Google Patents

Abstract

A sphere tap contains a case with a branch pipe and a spherical plug, which inserted in it and connected to a rod, on which a pressure bush and gland sealing are disposed, on the case and the branch pipe faces, which are matching the plug, the sealing rings are installed, and between the case and the branch pipe the sealing is placed. The case has a boring with a conical and a cylindrical surfaces, on the branch face the cylindrical surfaces are made. The sealing contains in it an one-sided wedge and a cylinder, is located in the case boring, and matching to its cylindrical and conical surfaces, and to the branch pipe cylindrical surfaces. More to it, the rod is composed of the steps with a groove, in which the gland sealing protrusion is inserted.

Description

consolidation.

To simplify the assembly and installation and improve the sealing conditions, the groove in one of the steps of the rod has an annular shape, while the protrusion of the gland seal in the annular groove of the rod forms an annular seal.

Combs at an angle of 30" are made to create a labyrinth seal with sealing rings under the spherical floating plug in the body and the tap nozzle.

The technical result that is achieved when using the invention: increased reliability and durability of the faucet due to ensuring the tightness of the connection between the body and the nozzle using a wedge connection, which is formed by a one-sided wedge with a conical surface in the boring of the body; tightness is ensured with a small torque on the fastening elements in the crane, while the wedge connection relieves overstress on the bolted connections, because the specific pressure (P) of the forces is much less than the pressure (Ро) that is reflected from the surface of the wedge with an angle of 157; the tightness of the sealing cylinder with the housing and the nozzle is ensured due to the connection of the cylindrical surfaces with the corresponding cylindrical surfaces of the housing and the nozzle; ensuring free rotation of the rod without jamming the pressure bushing of the housing due to the fact that there is a radial gap between the outer surface of the pressure bushing and the inner surface of the housing, while ensuring the free rotation of the rod together with the stuffing box seal, the pressure bushing and the nut, which is installed on top of the rod and is one intact during rotation; the tightness of the rod with the body and stuffing box seal is ensured due to the fact that when the pressure bushing is tightened, a radial seal is formed between the end of the rod and the end of the fixed pressure bushing, while when controlling the crane, sliding occurs along the inner diameter of the body, and the protrusion of the stuffing box seal enters the annular a groove in one of the steps of the rod, forming an annular seal; there is no misalignment of the connection between the cover and the nozzle, because a zero gap is established between them, which is ensured by the presence of a gap that compensates and is filled with material under the force of the bolted connection.

The claimed ball valve is explained in the following description and drawings, wherein:

Fig. 1 - a cross-section of a ball valve without a handle;

Fig. 2 - drawing I according to Fig. 1;

Fig. 3C - its projection according to Fig. 1;

Fig. 4 - its rendering according to Fig. 1;

Fig. 5 - the body of the crane;

Fig. 6 - rendering of IM according to Fig. 5;

Fig. 7 - faucet nozzle;

Fig. 8 - projection of M according to Fig. 5 and Fig. 7;

Fig. 9 - the design of the rod.

According to the invention, a ball valve made of corrosion-resistant steels, titanium alloys and other materials contains a body 1 with a nozzle (cover) 2, which are fastened together with a pin (bolt) and a nut 4 (see Fig. 1)

Inside the body 1, a spherical free-floating plug 5 is installed, which is connected to a rod 6, on which a pressure sleeve 7 and a fluoroplastic gland seal 8 are located.

At the points of contact of the spherical plug 5 with the body 1 and the nozzle (cover) 2, sealing fluoroplastic rings 9 are installed.

Sealing fluoroplastic rings 9 are connected to the body 1 and the nozzle 2 with the help of combs at an angle of 30", which determines the high degree of tightness of the ball valve shutter (see Fig. 1, Fig. 8).

Between the body 1 and the nozzle 2, a combined fluoroplastic seal is installed, which is a one-sided wedge 10 with a surface at an angle 15 and a cylinder 11, which is located in the bore of the body 7 (see Fig. 1, Fig. 2).

Fluoroplastic wedge 10 and cylinder 11 relieve overvoltage on the bolted connection (on pin C and nut 4) (see Fig. 1).

In boring on the end of the housing 1, a conical surface 12 corresponding to the surface of the wedge 10 is made at an angle of 15", in connection with which the cylindrical surface 1Z will be made (see Fig. 5, Fig. b).

Between the ends of the conical surface 12 of the boring of the housing 1 and the end of the wedge 10 of the seal, a gap 14 is formed, which compensates and which is filled during the assembly of the housing 1 and the nozzle 2 with the material of the combined fluoroplastic seal under the force of the pin C and the nut 4 (see fig. 1, fig. .2).

The conical surface of the wedge 10 is connected to the conical surface 12 in the boring of the body 1, forming a wedge joint, and cylindrical surfaces 15 and 16b are made on the end of the spigots (covers) 2 (see Fig. 2, Fig. 7).

The cylindrical surface 16 of the nozzle (cover) 2 is in contact with the cylindrical surface 17 of the housing 1 and the cylindrical surface of the combined seal (wedge 10 and cylinder 11), thus closing the seal, while the cylindrical surface 15 of the nozzle (cover) 2 is in contact with the cylindrical surface 13 of the housing 1 (see Fig. 1, Fig. 2, Fig. 5, Fig. b, Fig. 7).

The end face 18 of the nozzle (cover) 2 contacts the end surface 19 of the combined seal (wedge 10 and cylinder 11), thereby pressing on the seal as a whole to create a zero gap between the flanges of the body 1 and the nozzle 2 (see Fig. 1, Fig. 2, Fig. 7).

According to Fig. 1, Fig. 3, Fig. 9, the rod 6 has steps 20 and 21, which alternate, with an annular groove 22, which is made in one of the steps.

According to Fig. 1, Fig. 3, the nut 23 is installed on the rod 6, while the pressure sleeve 7 is one whole unit with the gland seal 8 when the rod 6 is rotated.

According to Fig. C, between the outer surface of the pressure sleeve 7 and the inner surface of the housing 1, a radial gap 24 is made, which ensures free rotation of the rod b and excludes jamming of the pressure sleeve 7 with the housing 1.

At the same time, when the pressure bushing 7 is tightened with the help of the nut 23, a radial seal is formed between the end of the rod 6 and the end of the pressure bushing 7, and when the crane is operated, sliding occurs along the inner diameter of the housing 1.

The gland seal 8 by tightening the pressure sleeve 7 fills the annular groove 22 of the rod 6, thereby ensuring tightness due to the creation of an annular seal (see Fig. 3, Fig. 9).

Inside, the body 1 and nozzle 2 have a surface with a comb, which is made at an angle of 30" to obtain a labyrinth seal with sealing rings C (see Fig. 1, Fig. 4, Fig. 5, Fig. 7, Fig. 8).

The operation of the crane is carried out in the following way.

Complete closing or opening of the through hole of the faucet occurs when the spherical plug is turned 90" clockwise to the stop - "closed", counterclockwise to the stop - "open".

Wedge 10, cylinder 11 and cylindrical sealing surfaces 15, 16 to create a seal between the housing 7 and the nozzle (cover) 2 do not require much effort.

The mechanical forces from the pin Z and the nut 4 between the housing 1 and the nozzle 2 are applied with a specific pressure P, and in the wedge connection, the forces reflected from the conical surfaces of the wedge 10 and the bore of the housing 1 increase to the pressure Po. In this way, Ro » P, which improves the tightness of the seal between the flange parts (body 1 and nozzle 2) of the faucet and creates a guaranteed seal between the plug 5, body 1 and nozzle 2 due to fluoroplastic rings 9 and combs at an angle of 30" in the body 1 and nozzle 2.

The proposed ball valve allows: to increase the service life of the structure during operation and to ensure its tightness; to reduce the operational costs of maintaining ball cranes. p o i v I o oo ke i i what shi ! no shsh shsh shsh | still nn an :: IV! tires are not: we are M yet WHICH

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