RU68087U1 - BALL VALVE CONCRETE - Google Patents

Abstract

The utility model relates to the field of pipeline valves, namely, to the design of locking devices used in process pipelines and utility pipelines.

The purpose of the proposal is to reduce the material consumption and, as a consequence, the cost of the crane while improving the manufacturability of its design and reliability during operation of the crane.

The integral ball valve contains a housing, a ball plug, a rod, ball seals and a rod seal. The crane body is made of two half-bodies connected by one welded annular seam offset along the axis of the crane relative to the center of the ball-plug. The half-shells have external and internal spherical surfaces, concentric to the ball-plug, and also cylindrical surfaces for mutual centering of the half-shells. A design feature is that the axis of the stem body and the stem itself, as well as the axis of the non-circular hole made in the ball plug for connection with the stem, are located at an angle different from the straight line to the axis of the through hole in the valve body, while the stem body is located on that part of one of the half-shells, which is bounded by spherical surfaces. 1 ill.

Description

The utility model relates to the field of pipeline valves, namely, to the design of locking devices used in process pipelines and utility pipelines.

Known all-in-one ball valve comprising a housing, a ball plug, a rod, ball seals and a rod seal. The crane body is made of two half-shells connected by a welded annular seam offset along the axis of the crane relative to the center of the ball-plug, and having external and internal spherical surfaces concentric to the ball-plug, as well as cylindrical surfaces for mutual centering of the half-shells [patent No. 52694, F16K 5 / 06, publ. 04/27/2006. Bull. No. 12]. However, the crane has increased material consumption and lack of manufacturability.

The proposed solution is based on a technical problem - reducing the material consumption and, as a result, the cost of the crane while improving the manufacturability of its design and reliability during operation of the crane.

The specified technical problem is solved by the fact that in an all-in-one ball valve containing a ball plug placed in a housing made of two half-bodies connected by a welded annular seam offset along the axis of the valve relative to the center of the ball plug and having external and internal spherical surfaces concentric ball plug, and cylindrical surfaces for mutual centering of the half-shells, as well as the stem, ball seals and stem seals, according to the proposal, the axis of the body (neck) of the stem and the stem itself, as well as s noncircular hole in the ball-tube with a rod for connection are arranged at an angle different from the direct to the axis of the passage opening in the valve body. In this case, the stem housing is located on that part

one of the half-shells, which is limited by its spherical surfaces.

The essence of the utility model is illustrated in the drawing, which shows a General view of the crane.

The crane contains two half-bodies 1, 2, a ball plug 3 located in them, a stem 4, ball seals 5 and a rod seal 6. The half-shells are connected by one welding annular seam 7, offset along the axis of the crane relative to the center of the ball-plug. The outer A and inner B surfaces of each half-shell are made spherical. The half-shells also have cylindrical surfaces B for mutual centering. The housing 8 of the rod is mounted on the spherical part of one of the half-bodies 1 or 2 of the crane. The axis of the housing 8 and the stem 4 itself, as well as the axis of the non-circular hole 9, made in the ball-plug for connection with the rod, are located at an angle α different from the straight one relative to the axis of the bore in the valve body.

The connection of the valve to the pipeline can be flanged with flat or collar flanges 10, welded with additionally welded nozzles, socket, union, spigot or combination.

The distances from the seals 5 of the ball plug to the central weld 7 connecting the half-shells are approximately the same and with a ball diameter of more than 100 mm are sufficient to protect the seals from overheating when the specified weld is applied. Therefore, welding of half-shells with pre-welded flanges and installed seals can be done at the final stage of crane assembly. In this case, the flanges can be as close as possible to the seals 5, since they are welded to the half-shells before installing the seals in them. Due to this, it becomes possible to perform a crane with the smallest of the permissible number of construction lengths, which ultimately significantly reduces material consumption

the crane and its cost, especially in the case of manufacturing crane parts from corrosion-resistant and other special materials.

The possibility of significantly reducing the length of the cylindrical part of the enclosing half-housing also allows to reduce the material consumption and the cost of the crane. In the prototype, this part served not only to fulfill the inner cylindrical centering surface B, but also to accommodate the lower part of the stem housing. With the proposed inclined position of the stem housing, its lower part is entirely located in the spherical part of the half-housing.

Due to a significant reduction in the length of the centering cylindrical surfaces In the half-shells, a reduction in the complexity of their processing is achieved.

Crane half-shells have the same length and are made of the same blanks, which eliminates the need to make various stamping accessories for the production of half-shell blanks and increases the manufacturability of the crane design.

When the rod is inclined, it “passes” only through one of the half-shells, so there is no need to perform a groove under the rod in the second half-shell, which reduces the stress concentration in it and thereby contributes to a more reliable operation of the crane and a decrease in the laboriousness of its manufacture.

The crane works as follows.

A handle 11 is mounted in a detachable manner on the valve stem 4 of the valve. The impact from the handle through the rod 4 is transmitted to the ball plug 3 due to a non-circular hole specially made in it, into which the rod 12 is inserted. The ball plug rotates in its seals 5 and blocks the flow. The valve has stroke limiters located on the stem housing, allowing the ball to be rotated through an angle φ = 90 ° + arc sin (ctg ² α) from the position when the valve is fully open, to the position of complete closure.

Improving the tightness of the valve is ensured by the initial tightening of the half-shells during assembly, during which a gap-free connection of the ball-plug with seals is formed.

To ensure the tightness of the valve along the stem 4, the latter has an annular seal 6, which is crimped by screwing the threaded sleeve 13 into the stem housing.

The crane can work under various working environments: gas, steam, water solution, oil products, alcohol-containing solutions, aggressive liquids.

Industrial applicability.

Cranes can be used in heat supply systems of industrial enterprises and housing and communal services, water supply systems, cooling and air conditioning systems, technological and engineering networks of enterprises and main pipelines, as well as in vehicles (fire engines, tankers, etc.).

Claims (1)

The ball valve is one-piece, containing a ball plug placed in a housing made of two half-bodies connected by a welded annular seam offset along the axis of the valve relative to the center of the ball plug and having external and internal spherical surfaces concentric with the ball plug and the stem, ball seals and rod seals, characterized in that the axis of the rod body and the rod itself, as well as the axis of the hole made in the ball plug for connection with the rod, are located at an angle different from the straight line to the axis of the bore hole I in the valve body, wherein the rod body is disposed on a part of one of the half-shells, which is limited by spherical surfaces.