JPS63293371A - Spherical valve - Google Patents

Abstract

PURPOSE:To make it possible to facilitate the insertion of a valve member into a valve barrel by forming either one of the upstream and downstream openings in the valve barrel so as to have a size slightly larger than the contour of the valve member so that the valve element is inserted into the barrel through the larger opening. CONSTITUTION:An integral valve barrel 2 has upstream and downstream openings 2C, 2D, the upstream opening 2C having a diameter D which is slightly larger than the outer diameter (d) of a valve member 1 which may be therefore inserted into the valve barrel 2 through the upstream opening 2C. During the assembly of a spherical valve, the valve member 1 is inserted into the valve barrel 2 through the upstream opening 2C. Thereafter an adapter 23 is fitted in the inner peripheral surface of the upstream opening 2C, and a seal ring 8 and a retainer ring 9 are fitted in the inner peripheral surface of the adapter 23. The upstream opening 2C of the valve barrel 2 is slightly larger than the downstream opening 2D, thereby it is possible to insert the valve member 1 into the valve barrel 2 through the upstream opening 2C.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a spherical valve suitable for artificial valves for high head water turbines, top stop valves for pumped storage power plants, and the like.

(Prior art and its problems) An example of a conventional spherical valve of this kind is shown in FIGS. 2 and 3, where FIG. 2 is a longitudinal cross-sectional view and FIG. 3 is a view taken along line mm in FIG. FIG.

In FIGS. 2 and 3, 1 is a valve body equipped with a cylindrical flow passage la, and a cylindrical flow passage 1 is provided on the outer periphery of the central part in the axial direction.
A pair of valve shafts 10 extending in a direction perpendicular to the axis of the valve a are integrally formed. 2 is the valve body, and its upstream flange 2
a is fastened to the upstream short pipe 3 with bolts 4, and the downstream flange 2b is fastened to the downstream joint 5 with bolts 6. In order to incorporate the valve body 1 into the valve body 2, the valve body 2 is divided into two parts almost symmetrically at the center thereof, that is, in a plane containing the axis of the valve shaft lO, and the upstream side constituted by the two divisions. Divided flanges 2c and 2d formed on the dividing surfaces of the valve body 2A and the downstream valve body 2B are fastened to each other with bolts 7.

As shown in FIG. 3, the valve shaft 10 passes through the valve body 2 and projects to the outside, and a lever 11 is fastened to the projecting end.

The split flanges 2c and 2d at the shaft hole 2e portion where the valve shaft IO passes through the valve body 2 are made thick, and these portions are fastened with large-diameter bolts 17. Then, the valve shaft 10 and the shaft hole 2
A packing 18 is fitted into a groove bored in the 0-divided surface in which the valve stem sleeve 12, bushing 13, bushing case 14, packing 15, and packing retainer 16 are disposed between the valve shaft sleeve 12, bushing 13, bushing case 14, packing 15, and packing retainer 16.

By rotationally driving the valve shaft 10 via the lever 11, the valve body 1 rotates within the valve body 2, and in the fully closed state shown in the figure, the upstream side of the valve body 1 has a seal ring 8 and a retainer ring 9. The downstream side is connected to the joint 5 through a seal ring 19 and a retainer ring 20.

When the valve shaft 10 is rotated 90 degrees from this fully closed state, the valve body 1
is fully opened as shown by the two-dot chain line in FIG. 2, and the water flows in the direction of the white arrow.

In this spherical valve, since the valve stem 10 passes through the dividing surface of the valve body 2, not only does the structure of the penetrating part become complicated, but also the upstream side valve Torso 2
Since A and the downstream valve 2B must be assembled in advance, the cost increases.

In order to deal with the above-mentioned problems, a spherical valve shown in FIGS. 4 and 5 was proposed. This biases the dividing surface of the valve body 2 toward the upstream side from the axis of the valve stem 10, so that the valve stem 10
It penetrates through B and protrudes to the outside. The valve stem 10 is processed separately from the valve body 1, and after the valve body 1 is assembled into the valve v42, it is inserted into the six 1b drilled in the valve body 1 and the shaft hole 2e bored in the downstream valve body 2B. It is inserted from the fluid flow path 1a side and fixed to the valve body 1 with pins 21 and bolts 22. The rest of the structure is similar to the conventional spherical valve shown in FIGS. 2 and 3, and corresponding parts are given the same reference numerals.

This spherical valve has a problem in that the upstream valve body 2A and the downstream valve body 2B are asymmetrical, which increases the manufacturing cost.

Also, in this spherical valve, since the valve body 2 is divided into two parts in order to incorporate the valve body 1 into the valve body 2, the divided flanges 2c, 2d and the numerous bolts 7 that connect them to each other are required. In addition, there were problems in that it required a great deal of effort and time to assemble and disassemble the valve body 2, and that the strength and watertightness of the dividing surface were unreliable.

(Means for Solving the Problems) The present invention was invented to solve the above problems, and its gist is that a valve body having a cylindrical flow path is connected to a pair of valves. In a spherical valve rotatably supported within a valve body by a shaft, either an upstream opening or a downstream opening of the valve body is slightly larger than the contour of the valve body, and the valve body is inserted through this opening. A spherical valve characterized by being inserted into the valve body.

(Operation) Since the present invention has the above configuration, the valve body is inserted and assembled into the valve body through an opening slightly larger than its contour.

(Example) One embodiment of the invention is shown in FIG.

The valve body 2 is not a two-part structure, but has an integral structure,
The upstream opening 2C connects the valve body 1 to the valve body 2 from this opening 2C.
D is slightly larger than the contour d of the valve body 1 so that it can be inserted into the valve body 1.
It is said that

Thus, when assembling the spherical valve, the valve body 1 is inserted into the valve body 2 from this upstream opening 2C. Thereafter, the adapter 23 is fitted to the inner peripheral surface of the upstream opening 2C, and the seal ring 8 and the retainer ring 9 are fitted to the inner peripheral surface of the adapter 23. The adapter 23, seal ring 8, and retainer ring 9 are fixed within the valve body 2 by fastening the upstream flange 2a and the upstream short pipe 3 with bolts 4.

The downstream opening 2D of the valve body 2 is similar to the conventional one shown in FIGS. 2 to 5, and the seal ring 19 and retainer ring 20 fitted on the inner peripheral surface are connected to the downstream flange 2b and the downstream joint. 5 is fixed within the valve body 2 by fastening with bolts 6.

The valve stem 10 is similar to the conventional one shown in FIGS. 4 and 5, after the valve body 1 is assembled into the valve body 2, the valve stem 10 is formed by inserting the valve body 1 into the valve body 2 and the six 1b bored into the valve body 2. It is inserted into the shaft hole 2e from the fluid flow path 1a side and fixed to the valve body 1 with a bottle 21 and a bolt 22.

Therefore, since the upstream opening 2C of the valve body 2 is slightly larger than the contour of the valve body I, the valve body 1 is
C into the valve body 2 and therefore the valve body 2
It is no longer necessary to have a two-part structure.

In addition, in the above embodiment, the upstream opening 2C of the valve body 2
is made slightly larger than the contour of the valve body 1, but instead of this, the downstream opening 2D is made slightly larger than the contour of the valve body l,
The valve body 1 can also be inserted into the valve body 2 through this downstream opening 2D. Furthermore, in the above embodiment, when the valve is closed, the upstream and downstream sides of the valve body 1 are sealed by the seal ring and the retainer ring, respectively. You can do it like this. Furthermore, if the rigidity of the valve body 1 is increased by increasing the wall thickness of the valve body 1, the lip protruding from the outer periphery of the valve body 1 can be omitted, and the outline of the valve body 1 can be made smaller.

(Effect of the invention) In the present invention, either the upstream opening or the downstream opening of the valve body is made slightly larger than the contour of the valve body, so the valve body can be inserted into the valve body from this opening, and therefore the valve body can be inserted into the valve body from this opening. 2 torsos
There is no need for a split structure.

As a result, there is no need for split flanges and a large number of bolts for fastening them together, resulting in a significant reduction in cost, ease of assembly and disassembly, and improved strength and watertightness.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention. Second
2 and 3 show an example of a conventional spherical valve, with FIG. 2 being a longitudinal cross-sectional view and FIG. 3 being a partial cross-sectional view taken along line mm in FIG. 2. 4 and 5 show other conventional spherical valves, with FIG. 4 being a longitudinal cross-sectional view and FIG. 5 being a partial cross-sectional view taken along line V--V in FIG. 4. Valve body-1, flow path-1a, valve stem-10, valve body-2,
Upstream No. 1 Figure 2 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a spherical valve in which a valve body having a cylindrical flow path is rotatably supported within a valve body by a pair of valve shafts, either an upstream opening or a downstream opening of the valve body is connected to the valve body. A spherical valve characterized in that the valve body is inserted into the valve body through this opening, which is slightly larger than the outline of the spherical valve.