JPS60179577A - Ball valve - Google Patents

Abstract

PURPOSE:To simplify the external form of a valve, by constituting a stopper mechanism with an insert holding a stem and a ball seat. CONSTITUTION:An insert 15 is screwed in from an opening part 22 of a body 11, while an end face of an annular part 24 of the insert 15 is made contact with an engaged surface 27 formed in a flange part 19 of a stem 16. When the stem 16 is turned round clockwise, a notched surface 25 of the stem 16 rotates while coming into contact with an end face of the annular part 24, and an engaged surface 26 connectedly formed on the notched surface 25 is engaged with the end face of the annular part 24 whereby the stem 16 is checked in its rotation certainly in a state of being rotated at 90 deg. and thereby a valve flow passage is held in a closed state.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ball valve that is provided with a stopper mechanism to ensure reliable opening and closing rotation within an angular range of 90 degrees.

Conventional ball valve stopper mechanisms control the rotation angle of the handle by bringing a part of the stopper of the lever handle into contact with a part of the outside of the body or a protrusion (or recess) provided on the outer circumferential surface of the body. I try to stop it at 90 degrees.

To explain the above conventional example in detail with reference to FIGS. 1 and 2, a stem 4 is attached to a ball 3 having a through hole 2 in a body 1, a lever handle 5 is fixed to the upper part of this stem 4, and a lever handle 5 is fixed to the upper part of this stem 4. Part of the stopper 6 provided on the handle 5
is engaged with a protrusion 7 formed on the body 1, so that the handle 5 can be rotated within an angle range of 90 degrees. Insert screwed into body 1, 10
is Patsukin. However, according to this conventional example, the stopper 91 is attached to the lever handle 5! 6 'f: form tt
Moreover, since the protrusion 7 is provided on the outer periphery of the body 1, there is a drawback that the external shape and structure of the valve are accordingly complicated.

In addition, since the lever handle 5 is generally made by pressing, and the body 1 is often made by forging or casting, dimensional errors inevitably occur, making it difficult to stop the handle 5 at an accurate position. The opening/closing position of the valve will be inaccurate, and since the stopper mechanism is exposed on the outer periphery of the valve, if a foreign object gets caught in the engagement surface of the stopper mechanism, the locking position of the stopper mechanism will shift and the valve will close. There is a drawback that the opening/closing position is inaccurate.

Furthermore, the conventional connection between the lever bundle 5 and the stem 4 is prone to play, and when play occurs, the opening and closing positions of the valve become inaccurate. 1st rf again! Since the lever handle 5 doubles as a stopper as shown in FIG. 2 and FIG. 2, the lever bundle 5 cannot be removed from the valve.

The present invention was developed in order to eliminate the conventional problems, and its purpose is to simplify the external shape of the lever bundle etc. by providing a stopper mechanism inside the valve, and to machine parts of the stopper mechanism. In addition to improving dimensional accuracy by using parts that are made of aluminum, the stopper mechanism is installed inside the valve and the stopper mechanism is installed outside to prevent foreign objects from getting caught and ensure that the opening and closing positions of the valve are always accurate. Furthermore, the stopper mechanism is completely unaffected by looseness at the connection between the stem and the lever handle, and can also be applied to valves that remove the handle, without using a specific lever bundle. The present invention aims to provide a hole valve that can also be applied to a valve that can use a spanner or the like.

The structure of the ball valve according to the present invention for achieving the above object is such that a ball having a through hole is provided inside a body having openings on both sides so as to be rotatable seven times, and the ball is screwed into the body from one or both of the openings. The inserted insert holds one or both of the ball seats for sealing contact with the surface of the ball, an annular portion is provided at one end of the insert in the screwing direction, and the stem of the stem attached to the ball is A part of the stem located inside the body has an end face of the annular part and 9
A cutout surface is formed that slides and rotates in an angular range of 0 degrees, and at both ends of the cutout surface, the ends of the annular portion are engaged at both positions where the stem rotates in an angular range of 90 degrees. It is formed with continuous stop surfaces.

An embodiment of the present invention will be described in detail below with reference to the drawings. Third
The figure is a longitudinal cross-sectional view of the ball valve according to the present invention, and Figure 4 is a cutaway of the connecting part between the handle and stem in Figure 3, taken along line B-B.
5 is an enlarged view of part a in FIG. 3, and FIGS. 6 and 7 are sectional views taken along line C-C in FIG. In the figure, 11 is a body for the valve, 12 is a ball having a rotatable through hole 13 provided in the body 11, 14 is a ball seat for sealing the ball surface, and 15 is one of the ball seats 14 (
16 is a stem whose lower end is attached to the ball 12; 17 is the stem 16;
The Leno 1-handle is fixed to the upper end with a Nando 20 via a 7-piece handle 18, 19 is a flange formed in the middle of the stem 16 to prevent it from popping out, and 21 and 22 are openings formed at both ends of the podium 11. be. The above-mentioned insert 15 forms a stepped portion 23 for mounting the ball seat 14, and an annular portion 2 is formed at the end of this stepped portion 23 in the insert screwing direction.
4, and a flange 19 formed in the middle of the stem 16.
is formed with a cutout surface 25 that slides and rotates in an angular range of 90 degrees with the end surface of the annular portion 24, and the end surface of the annular portion 24 is engaged with both ends of the cutout surface 25 every time the stem 16 rotates 90 degrees. A locking surface 26,27 for locking is formed in a continuous manner.

The cutout surface 25 formed on the flange 19 and the cutout portions of the locking surfaces 26 and 27 connected thereto are formed on the lower side of the flange 19, and the upper side of the cutout portion is connected to the engagement portion of the insert 15. 2
8, and when the annular portion 24 of the insert 15 enters the notch, the end surface is provided so as to come into contact with the notch, and the above-described engaging portion 28 is supported on the upper surface of the annular portion 24.

The force directed outward of the valve is received by the above-mentioned flange 19, but in the case of force pushing the stem inward of the valve, conventionally the force is received by the gasket 10 as shown in FIG. Therefore, when the stem 4 is pushed down after the seal 1o has been polished, the ball 3 is pushed, and the sealing function of the valve is not adversely affected.

However, in this embodiment, as described above, the stem 16
The annular portion 24 of the insert 15 enters the notch,
Since the packing 18 receives the downward force of the worn stem 16, the ball 12 is not pushed and the sealing function of the valve is not affected in any way.

Next, the operation of the above embodiment will be explained.

As shown in FIG. 3, the insert 15 is screwed into the opening 22 of the body 11, and the distance between one step in the body 11 and the insert 15 is controlled by opening/closing the valve and controlling the fluid flowing inside the valve. The annular portion 24 of the insert 15 is set at a distance that allows sealing, and as shown in FIGS. 5 and 6.
A locking surface 27 formed on the flange 19 of the stem 16
6, the stem 16 is prevented from rotating counterclockwise in the state shown in FIG. 6, keeping the valve open as shown in FIG.

Next, when the stem 1G is rotated in the clockwise direction in FIG. The stem 16 is fixed to the end face of the 9
Rotation is reliably prevented when rotated by 0 degrees, and the flow path of the valve is maintained in a closed state.

In addition, the annular portion 24 of the insert 15 enters the lower side of the collar portion 19 and supports the push-down blade of the stem 16.
The ball 12 is not pressed and the sealing function of the valve is not adversely affected.

In the above example, the insert 15 is screwed in from the opening 22, but it is also possible to screw in the insert from both the openings 22 and 23, and use the stepped portions provided on the two inserts to form a ball sheet. 14 and 14 may be held, and in this case, one of the two inserts is formed with an annular portion as described above.

Although the embodiments have been described above, according to the present invention, a cutout surface is formed in a part of the stem located in the stem, and the cutout surface slides and rotates in an angle range of 90 degrees with the end surface of the annular portion. The stopper mechanism is installed inside the valve body without the need for a new stopper part by connecting and forming a locking surface that locks the end face of the annular portion every time the stem rotates 90 degrees, resulting in the following excellent effects. has.

(1) Since the stopper mechanism is installed inside the valve, the external shape of the valve can be simplified, and since the stopper mechanism is not exposed to the outside, there is no possibility of incorrect opening/closing position of the valve due to foreign matter getting caught. There is no room for this to occur.

(2) Since the stopper mechanism component is a machined component, its dimensional accuracy is high, and the opening/closing position of the valve is extremely accurate compared to the conventional method.

(3) The play between the stem and the lever handle is completely unrelated to the stopper mechanism, and there is no possibility of problems caused by play at the connecting portion between the two, as in the past.

(4) Even if the lever handle is removed, the stopper mechanism remains, so it can be made into a type of valve where the handle is removed, or it can be made into a valve that can be used with a spanner etc. without using a specific lever bundle, etc. , extremely versatile.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing a conventional example of a ball valve, Figure 2 is a partial cross-sectional view taken along line A-A in Figure 1,
7 to 7 show an embodiment of the present invention, FIG. 3 is a vertical cross-sectional view of a ball valve according to the present invention, and FIG. 4 is a partial cross-sectional view taken along line B-B in FIG. 3. 5 is an enlarged view of part a in FIG. 3, and FIGS. 6 and 7 are sectional views taken along the line C--C in FIG. 5, showing a state in which the stem and the insert are partially in contact with each other. 11...Body, 12...Ball, 13...Through hole, 1
4... Ball seat, 15... Insert, 16... Stem, 19... Flange, 21, 22... Opening, 23...
Stepped portion, 24... annular portion. 25... Notch surface, 2G, 27... Locking surface. 28... Engaging portion patent applicant Kitazawa Valve Co., Ltd. Fig. 1 Fig. 2 Fig. 3 Fig. 4 Fig. 5 Fig. 5 G Fig. 6 Fig. 7 Procedure Ne City official letter (voluntary) April 6, 1982 Mr. Kazuo Wakasugi, Commissioner of the Japan Patent Office■, Indication of the case, Patent Application No. 35262 of 1982, Name of the invention, Ball Valve 3, Relationship with the person making the amendment Patent applicant address: 3-17-9 Minami-Aoyama, Minato-ku, Tokyo Name: Kitazawa Valve Co., Ltd. 4, Agent: 03 (438) 1465 Address: 5-2-7 Toranomon, Minato-ku, Tokyo Voluntary 6, “Figure 5” in the drawings subject to amendment 7. As shown in the appendix, in the drawing [Figure 5 J is corrected. Figure 5

Claims (1)

[Claims] One side of a ball sheet for rotatably providing a ball having a through hole inside a body having openings on both sides, and bringing the surface of the ball into sealing contact with an insert screwed through one or both of the openings. Or, hold both of them, extend an annular part to one end of the insert in the screwing direction, and further attach the above-mentioned annular part to a part of the stem located in the body behind the stem attached to the ball. A cutout surface is formed that slides and rotates in an angular range of 90 degrees with the end surface, and the end surfaces of the annular portion described above are engaged with both ends of the cutout surface at positions on both sides where the stem rotates in an angular range of 90 degrees. It is characterized by continuous formation of a locking surface. Ball valve.