JPS631095Y2 - - Google Patents

Description

[Detailed description of the invention] "Field of industrial application" The present invention relates to an improvement of a ball valve for a room cooler, which is used in a separate room cooler, etc., and has an internal piping hole 2 and an external piping hole 3. It is characterized in that the body 12 is an integrally molded product and the seal packing 13 is provided only on one side.

"Prior Art" Conventionally, a ball valve used in a separate room cooler etc. has a valve body 1 as shown in Fig. 5.
It has an internal piping hole 2 at one end, an external piping hole 3 at the other end, and a spindle case 4' at the upper center.

This ball valve has seal pads 1 on both sides of a ball valve 16 that has a communication hole perpendicular to the rotation axis.
7 and a seal packing 18 are interposed, and the seal packing is pressed against the ball valve surface by a packing holder 14. Also, inside the spindle case, there is a valve shaft portion 9 having an operating driver groove 8 at the upper end and a packing on the outer periphery, and a lower end. A spindle 20 having a convex portion 19 is inserted into the spindle, and the convex portion 1 at the lower end of the spindle is inserted.
9 is engaged with the recess 21 above the ball valve 16, and the spindle is opened and closed to open and close the ball valve 16.

In conventional ball valves, a step 30 for preventing the spindle from coming off is provided on the inner peripheral surface of the spindle case 4', so the spindle 20 is inserted into the spindle case 4' from the in-machine piping hole 2 side of the valve body 1 and then moved upward. Close, then seal packing 17,
By screwing in the ball valve 16 and the ball valve 16 and the ball valve holder 14 with the seal packing 18 loaded at the tip, the seal packing is brought into pressure contact with the ball valve surface, and the internal assembly is completed.

However, in this conventional product, the spindle 20
Since the ball valve 16 is made up of two parts and the spindle lower end protrusion 19 and the ball valve recess 21 are fitted together, play inevitably occurs between the spindle 20 and the ball valve 16, which causes variations in the opening and closing of the ball valve when the spindle is opened and closed. occurs, making it impossible to fully demonstrate the performance of "reducing pressure loss," which is a characteristic of ball valves.

Further, for the above-mentioned reasons, this spindle 20 must be inserted into the spindle case 4' through the in-machine piping hole 2, and the recess 21 provided at the top of the ball valve 16 for rotation transmission must be inserted into the spindle case 4'. In order to fit it into the lower end convex portion 19, it is necessary to adjust its position. After inserting the spindle 20, insert the seal packing 17, and then insert the concave portion 21 on the top surface of the ball valve 16 into the convex portion 19 at the lower end of the spindle.
The sealing pad 14 loaded with the sealing padding 18 had to be screwed in, making the assembly complicated and requiring skill.

``Problems that the invention seeks to solve'' In addition to the increased pressure loss due to incomplete opening and closing due to the play between the spindle and ball valve, the complexity of assembly is a factor in increasing costs. At present, we are looking for ways to improve this point.

``Means for Solving the Problem'' Therefore, the technical problem of the present invention is to eliminate the complexity of assembly and eliminate the need for skill, as well as to create a spindle and ball valve that eliminate rotational errors and ensure reliable open and close states. It is an integrally molded product, which allows it to be assembled from the upper part of the valve body, and by tightening the packing retainer, the seal packing is brought into pressure contact with the ball valve surface and the valve body is prevented from coming off.

``Effects of the invention'' The valve body 12 of the ball valve in this invention has a spindle and a ball valve that are integrally molded, so opening and closing operations are reliable without any twists, improving performance, and eliminating the conventional complexity. The practical effects are significant.

In addition, the valve body 12 is designed so that the center of the ball valve portion 10 is located approximately on the center line of the internal piping hole 2 and the external piping hole 3 by simply inserting it into the main body 1.
By tightening the packing holder 14, the seal packing 13 loaded on the packing holder comes into pressure contact with the surface of the ball valve part 10, and the ball valve part 1 naturally comes into contact with the surface of the ball valve part 10.
0 is assembled at the center of the in-machine piping hole 2 and the external piping hole 3. Further, the upper surface of the lower end guide portion 11 of the valve body 12 engages with the outer peripheral portion 15 of the tip of the packing holder,
The valve body 12 is designed not to fall out.

As mentioned above, the present invention has the advantage that the valve body 12 is integrally molded, so that the valve body 12 can be assembled from above, which facilitates assembly, improves performance, and greatly reduces costs. This has a tremendous effect on industrial applications, as it solves all the difficult problems in the industry all at once.

``Embodiments'' The present invention is intended to eliminate these drawbacks, and its structure will be explained by referring to embodiments shown in FIGS. 1 to 4.

As shown in FIG. 2, the valve body 1 according to the present invention consists of a cylindrical valve case 4, an in-machine piping hole 2 and an external piping hole 3 that protrude orthogonally to the side from the cylindrical valve case 4, and the upper part of the valve case 4. A slit-shaped sealing surface 5 is provided on the inner peripheral edge of the opening, and a straight cylinder is formed at the lower part. On the other hand, a slit-shaped sealing surface 6 is provided on the inner peripheral edge of the opening of the in-machine piping hole 2, and a screw 7 is provided on the inner peripheral surface.

On the other hand, the valve body 12 inserted into the valve case 4 of the valve body 1 has a driver groove 8 formed at its upper end, as shown in FIG. A small diameter outer circumferential surface is provided on the outer circumferential surface, and a ring-shaped packing 22 is installed in the concave groove on the outer circumferential surface.
A ball valve part 9 is formed by inserting and fitting a ball valve part 9, and a ball valve part 10 with a communication hole in the center is formed at the lower part of the valve shaft part, and a guide part 11 is provided below the ball valve part 10. , these are made of an integrally molded product.

As shown in FIG. 4, the packing gland 14 is cylindrical and has a thread 23 on its outer periphery so as to mesh with the thread 7 on the inner periphery of the internal piping hole of the valve body. The rear of this thread has a seal surface 24 which can be pressed against the bevel-shaped seal surface 6 of the internal piping hole, and further behind this is a hexagonal head 25 for tightening it to the valve body.

Further, a stepped portion 26 into which the seal packing 13 is loaded is provided at the tip of the packing holder 14.

Note that 27 is a screw provided on the upper outer periphery of the valve body, 28 is a cap that is screwed into the screw,
It goes without saying that by tightening this, the serpentine sealing surface 5 provided on the inner peripheral edge of the upper opening of the valve case 4 and the sealing protrusion 29 of the cap 28 come into pressure contact to form a complete seal.

The valve body 12 with the ring-shaped packing 22 fitted into the valve stem 9 is inserted into the valve case 4 of the valve body from above, and then the packing holder 14 with the packing 13 loaded in the tip step 26 is inserted into the internal piping. The assembly of the ball valve is completed by tightening the screw 7 in the hole 2 and further tightening the cap 28 to engage the screw provided on the upper outer periphery of the valve body.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of an embodiment of the present invention, Fig. 2 is a longitudinal sectional view of the valve body, Fig. 3 is a front view of the valve body, Fig. 4 is a longitudinal sectional view of the seal retainer, and Fig. 5. is a longitudinal sectional view of a conventional ball valve for a room cooler. 1... Valve body, 2... In-machine piping hole, 3... Out-machine piping hole, 4... Valve case, 12... Valve body, 13...
... Seal packing, 14... Packing holder, 2
2...Ring-shaped packing, 28...Cap.

Claims (1)

[Scope of utility model registration request] A slit-like sealing surface 5 is provided on the inner peripheral edge of the upper opening of the cylindrical valve case 4, and an in-machine piping hole 2 and an external piping hole 3 are provided so as to communicate with the center of the valve case 4, and the in-machine piping hole 2. The valve body 1 has a slit-shaped sealing surface 6 on the inner peripheral edge of the opening and a screw 7 on the inner peripheral surface, and a driver groove 8 for operating from above in the valve case and a packing on the outer periphery. A valve body 1 having a valve stem portion 9, a ball valve portion 10, and a guide portion 11 integrally formed at the lower end.
At the same time, the seal holder 14 having a seal packing 13 at its tip is tightened into the in-machine piping hole 2 to press the seal packing against the ball surface, and the guide portion 1 of the valve body 12 is loaded.
A ball valve for a room cooler designed to engage with 1.