JPS5940605Y2 - Kotuku - Google Patents

Description

[Detailed Description of the Invention] (Field of Application) The present invention relates to a cock that is provided in a fluid conduit and opens and closes a fluid passage by rotating the cock plug.

(Prior art and its problems) As a conventional cock, as shown in Japanese Patent Publication No. 44-27110, a taper-shaped cock stopper is rotated through a sleeve through a tapered inner hole bored in the cock body. Some types are provided with a pressing member (spring) that is freely inserted and presses the sleeve in a direction parallel to the central axis of rotation of the stopper so as to press the sleeve and the stopper and the sleeve and the stopper main body.

However, in this first conventional cock, not only the cock body and the cock plug but also the sleeve are made of metal, so the contact surface between the cock body and the sleeve and the sliding surface between the sleeve and the cock plug are made of metal. Although they are slidingly processed, there is a problem in that there is a large amount of fluid leakage from these contact surfaces and sliding surfaces, and the sealing performance is poor.

As a cook who solved this problem,
There is one disclosed in Publication No. 67.

In this second conventional cock, in particular, by forming the sleeve with an elastic material, the contact between the cock body and the sleeve and the contact between the cock stopper and the sleeve are made into contact between the metal and the elastic material, and the metals come into contact with each other. This eliminates the need for a sliding process and improves sealing performance.

However, in this second conventional cock, the inner hole of the cock body is straight, the cock plug is tapered with a large diameter at the bottom, and the sleeve between the cock body and the cock plug has a straight outer periphery. In other words, an area difference is actively formed between the upper and lower end surfaces of the cock, and leakage fluid acts on the area difference to generate a pressing force. Because of this, the resistance when rotating the cock is the sum of the pressing force of the pressing member acting on the sleeve and the pressing force due to the leaked fluid, and a large operating force is required to rotate the cock. has.

(Technical Problem of the Invention) Therefore, the technical problem of the present invention is to improve the sealing performance of the cock and to reduce the operating force when rotating the cock.

(Technical means of the invention) The technical means of the invention to solve this technical problem is to fit a sleeve made of an elastic material into an inner hole bored in the cock body, and insert the cock stopper into the inner hole of the sleeve. The cock body is provided with a pressing member that is rotatably inserted and presses the sleeve in a direction parallel to the central axis of rotation of the cock cock, thereby bringing the sleeve and the cock cock into pressure contact with each other, and the sleeve and the cock body. The inner hole of the stopcock and the outer periphery of the sleeve have substantially the same tapered shape, and the outer periphery of the stopper and the inner hole of the sleeve have a straight shape.

(Function) According to the technical means of the present invention, the straight cock stopper is pressed into contact with the sleeve made of an elastic material, and the sleeve is pressed into contact with the cock body, and both are pressed into contact with the elastic material. The sealing performance is better than that of a cock, and since the cock is straight, the operating force required when rotating the cock is smaller than that of the second conventional cock whose cock is tapered.

(Special Effects) According to the present invention having the above technical means,
Compared to the means disclosed in Japanese Patent No. 78867 (second conventional cock), the following unique effects can be obtained.

In the second conventional cock, a large number of cock bodies are stacked in multiple stages, and a single cock stopper is commonly inserted into these many cock bodies, and the fluid passages of the many cock bodies are caused by the rotation of this one cock stopper. When using a multiple cock that simultaneously switches the cock, the taper type has a large diameter at the bottom, so the diameter of the cock becomes larger as you go from the upper stage to the lower stage. The stopper must be enlarged in the radial direction, making it large as a multiple stopcock.

On the other hand, according to the present invention, in the case of multiple cocks as described above, since the cock plugs are straight, the diameter of all the cock bodies may be the same, and the second conventional cock can be replaced with multiple cocks. It is smaller than if it were a cock.

In addition, when the means of Japanese Patent Publication No. 44-27110 (first conventional cock) is used as a multiple cock, the cock plug has a tapered shape with a large diameter at the top, so it is similar to the second conventional cock mentioned above. In addition, the cock body must be made larger in the radial direction of the cock stopper as it goes to the upper stage, making the cock of the present invention larger than the case where it is a multiple cock.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3.

1 is a longitudinal sectional view of one embodiment, FIGS. 2 and 3 are sectional views taken along line A-A in FIG. 1 and viewed in the direction of the arrow, and FIG. 2 is a handle 11. Fig. 3 shows the state when the handle 11 is at the position B, and Fig. 3 shows the state when the handle 11 is at the position D.

In the figure, there is a fluid passage 3°4.13 in the body 2 of the cock 1.
A tapered inner hole 5 is bored into the inner hole 5. A sleeve 6 made of an elastic material such as rubber or synthetic resin is inserted into the inner hole 5. A cylindrical (straight) cock plug 8 having a sliding surface 9 is rotatably inserted.

A pressing member (spring) 10 is interposed between the sleeve 6 and the flange portion of the cock stopper 8, and presses the sleeve 6 from the large diameter side toward the small diameter side.

Therefore, the contact surface (outer peripheral surface) of the sleeve 6 (1) is in pressure contact with the contact surface (inner peripheral surface) of the cock body 2, and the sliding surface (inner peripheral surface) of the sleeve 6 is in pressure contact with the contact surface (inner peripheral surface) of the cock body 2. It comes into pressure contact with the surface (sliding surface) 9.

Therefore, on the contact surface where the cock body 2 and the sleeve 6 come into contact and the sliding surface where the sleeve 6 and the cock plug 8 come into contact,
The metal surface and the elastic material surface come into contact, and the elastic material surface easily comes into close contact with the metal surface, resulting in better sealing than when the metal surfaces are in contact with each other, and fluid leakage is prevented.

Further, the areas where the cock body 2 and the sleeve 6 and the sleeve 6 and the cock stopper 8 come into contact are large, and the fluid passage 3.
4. Sufficient contact and sliding surfaces are maintained between the passages 4 and 13 to provide a seal between the respective passages.

Furthermore, since the force with which the pressing member 10 presses the sleeve 6 may be smaller than when the metal surfaces are in contact with each other, the cock 8 can be rotated easily.

When the handle 11 fixed to the cock 8 is in position B as shown in FIG. 2, the fluid passage 3 is connected to the fluid passage 4 via the communication passage 12 provided in the cock 8. .

When the handle 11 is rotated from position B in the direction of arrow C and moved to position D shown in FIG. 13, and the fluid passage 3 is blocked.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, FIGS. 2 and 3 are sectional views taken along line A-A in FIG. 1 and viewed in the direction of the arrow, and FIG. 3 shows the state when the handle is in position B, and FIG. 3 shows the state when the handle is in position D. DESCRIPTION OF SYMBOLS 1...cock, 6...sleeve, 10...pressing member, 2...cock body, 5...inner hole, 7...
...Inner hole, 8...Cock stopper, 11...
···handle.

Claims (1)

[Claims for Utility Model Registration] A sleeve formed of an elastic material is fitted into an inner hole bored in the cock body, a cock stopper is rotatably fitted into the inner hole of the sleeve, and the sleeve is rotated around the cock stopper. In a cock provided with a pressing member that presses in a direction parallel to the central axis of movement to press the sleeve and the cock stopper and the sleeve and the cock body, the inner hole of the cock body and the outer periphery of the sleeve are tapered to have substantially the same shape, A cock characterized in that the outer periphery of the cock plug and the inner hole of the sleeve are straight-shaped.