JPH0245579Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention is a structure that opens and closes a flow path by raising and lowering a valve body by rotating a manual operation handle, such as a stop valve mainly used in water supply equipment. The present invention relates to a valve, and more particularly to a valve that can maintain a closed state by idling the operating handle when water is not in use.

[Prior art]

In a water supply system, a water supply pipe separates from the distribution pipe and ends at a water supply valve (faucet), but a water meter and a stop valve are usually installed in the middle of this water supply pipe, so that the water supply pipe is not used. When not in use, especially for a long period of time, the waterworks bureau will remove the water meter and shut off the water supply pipe using a water stop relay pipe, and close the water stop valve when it is not in use for a relatively short period of time. , the water supply pipes are cut off.

By the way, the above-mentioned stop valve can be closed by rotating the valve stem using a torque wrench with the old type of stop valve, and with the current type, using a manual handle that is integrated into the stop valve. I'm going.

However, even if the valve is closed as described above when not in use, anyone can easily close the valve, so it is powerless against wastage of tap water or other water theft due to mischief, and there is no malicious intent. If the water shutoff valve becomes loose even for a moment, water leakage is unavoidable.

Therefore, conventionally, when the water supply bureau closes the stop valve, a cap-shaped cap is placed over the stop valve to avoid exposing the valve stem and handle, and the cap is fixed to the stop valve with a handle or set screw. Alternatively, sealing with a wire like an electric meter has been used, but it is expensive, and on the other hand, sealing makes the locking structure of the stop valve clear, making it easier to open the valve. It has drawbacks such as being powerless against malicious destruction.

[Problem that the invention attempts to solve]

Therefore, the present invention maintains a valve in the form of a stopcock that controls the opening and closing of a water supply flow path with a simple structure and simple operation, and also makes it possible to maintain the valve closing mechanism from the external appearance. The purpose is to safely prevent illegal operation of the valve by making its existence and structure difficult to see and confirm.

[Means to solve the problem]

In this invention, a short cylindrical neck that surrounds the valve stem is connected to the top of the valve case, and between this neck and the internal angular shaft of the valve stem, the neck can freely rotate and attach to the valve stem. A key shaft made of a non-magnetic material that is engaged in the circumferential direction and having a notch on its upper end surface is fitted, and the upper end surface of the key shaft is rotatably fitted to the outer periphery of the neck. A protrusion is sandwiched between the upper surface of the stepped portion of the non-magnetic shaft cylinder portion that is integrated with the hand turning handle that is fitted, and the protrusion is aligned with the upper surface of one of the middle and lower notches formed in the circumferential direction, and The magnetic plate is placed so as to extend over either the middle notch in the shaft cylinder portion and the upper end surface of the key shaft, or the lower notch and the notch in the key shaft. It is characterized in that a non-magnetic blind plate on which an operating rod can be placed is placed over the stepped part of the shaft cylinder part with a slight gap above the plate.

[Effect]

According to the present invention, when the main rotation handle is rotated with the magnetic plate placed across the low-level notch of the shaft cylinder and the notch provided in the key shaft, the shaft cylinder The valve stem is rotated via the key shaft engaged with the key shaft to open and close the fluid passage in the valve case.Next, when the passage is closed, the magnetic plate is moved onto the middle notch of the shaft cylinder. Since the plate is positioned on the upper end surface of the key shaft, the connection between the barrel barrel and the key shaft is removed, so even if the handwheel is rotated, the barrel barrel rotates idly with respect to the key shaft, and the fluid passage is blocked. is not opened.

〔Example〕

The present invention will be explained below based on the drawings.

Fig. 1 shows that even though the valve stem 2 is rotated with the handwheel 1, the valve stem 2 does not move up and down, and the rotation of the valve stem 2 causes the valve body 4 inside the valve case 3 to move up and down, and the water supply passage is opened. An embodiment in which the present invention is applied to a type of water stop valve that can be opened and closed is shown, in which a valve stem housing 5 is attached to an upper opening 3a of a valve case 3 by a screw connection (not shown). A cap 6 is attached to the upper end by a screw connection 14, the valve stem 2 is inserted into the valve stem housing 5 through the cap 6, and the valve body 4 is screwed into the male threaded portion 2a formed at the inserted portion. valve stem 2
The valve body 4 moves up and down (opens and closes) in response to rotation in the forward and reverse directions. Note that the valve stem 2 is equipped with an O-ring 7 at a portion that passes through the mouthpiece 6 to provide a seal.

The above-mentioned cap 6 has a shaft cylindrical portion 8 connected to the handwheel 1 around the valve stem 2 on its upper surface.
A short cylindrical neck part 6a, into which the parts are rotatably fitted, is integrally formed to hang upwardly. And, between the inner circumference of this neck part 6a and the square shaft part 2b formed on the valve stem 2, it rotates freely with respect to the inner circumferential surface of the neck part 6a and engages with the square shaft part 2b in the circumferential direction. A lower half 9a of the key shaft 9, which has an inverted convex cylinder shape, is fitted thereinto, and the upper half 9b of the key shaft 9 has an outer periphery extending over the outer periphery of the neck 6a. The shaft cylindrical portion 8 of the handle 1 is fitted so as to be freely rotatable, and the upper end 9c of the key shaft 9 extends from the recessed step upper surface 8a formed on the upper opening of the shaft cylindrical portion 8. In a slightly lower position, both surfaces 8a and 9c are exposed upward. Incidentally, the shaft cylinder portion 8 and the key shaft 9 are both formed of a non-magnetic material. 10 is the neck 6a
11 is a nut screwed onto the upper end of the valve stem 2 to prevent the key shaft 9 and the shaft cylinder portion 8 from coming off.
Showing the ring.

As shown in FIG. 4, the concave step upper surface 8a of the shaft cylinder portion 8 connected to the handwheel 1 has protrusions A extending to both sides in the circumferential direction. Two middle and low cut notches B, B and C, C are formed at symmetrical positions in the diametrical direction over a range of . As shown in FIG. 5, the upper end surface 9c is provided with notches 2 and 2 at intervals of 90° in the circumferential direction and having the same angle as above, and the key shaft 9 is inserted into the shaft cylinder portion 8. When the two are fitted together, the upper end surface 9c is made to coincide with the upper surface of the middle notch (b) of the cylindrical shaft portion. Reference numeral 12 denotes a middle notch portion B, B or a lower notch portion of the shaft cylinder portion 8, which extends outward in the diametrical direction of a disc portion 12a which is fitted into the upper half portion 9b of the key shaft 9 from above. , C and a magnetic plate protrudingly provided with fan-shaped engaging pieces 12b that can be fitted into both the notches d and d of the key shaft 9; When it is placed on the middle notch B and the upper end surface 9c of the key shaft 9, it is covered and closed by a non-magnetic blind plate 1' stretched over the center of the handwheel 1 with a slight space above. It is being done.

In the figure, reference numeral 13 denotes an operating rod having a magnetic plate 13b embedded in the lower part of a circular part 13a whose bottom faces the blind plate 1'.

In the water stop valve having the above structure, as shown in FIG. 1, the notch portion of the key shaft 9 is rotated by rotating the handle 1 by hand to align the notch portion of the key shaft 9 in the same angular direction. , D, and the low-stage notches C and C in the shaft cylinder portion 8. When the engaging pieces 12b of the magnetic plate 12 are inserted and fitted into them,
The shaft cylinder part 8 and the key shaft 9 are engaged in the rotational direction by the magnetic plate 12, so when the handwheel 1 is rotated in either the forward or reverse direction, the shaft cylinder part 8 and the key shaft 9 are engaged. When the valve stem 2 is rotated, the valve element 4 moves up and down within the valve case 3 to open and close the water supply channel.

Next, when you intend to keep the water stop valve closed for a long period of time, with the valve body 4 lowered, turn the operating rod 13 by hand in advance to make a mark (not shown) marked on a part of the handle 1. Then, the magnetic plate 12 and the magnetic plate 1
When the magnetic plate 12 is placed with the different poles of the plates 3b facing each other, the magnetic plate 12 is attracted toward the lower surface of the blind plate 1', and the engaging pieces 12b are attached to the notches C, C and the notches. Since the operating rod 13 is now rotated in the direction of the arrow a in FIG. When the operating rod 13 is pulled up vertically from above the blind plate 1', the magnetic plate 12 falls and touches the upper end surface 9c of the key shaft 9. The key shaft 9 is placed on the middle notch part B of the shaft cylinder part 8.
Therefore, even if the manual handle 1 is rotated, the key shaft 9 rotates idly and the valve stem 2 does not rotate, so that the flow path remains closed. It remains closed.

According to the above-mentioned water stop valve, if the magnetic plate 12 is positioned on the upper end surface 9c of the key shaft 9, even if the manual handle 1 is rotated, the shaft cylinder portion 8 only idles and the valve stem 2 does not rotate. The flow path is not opened and the valve body 4 can be kept in a closed state.In order to put the valve into use, a special operating rod equipped with magnetism is placed on the blind plate 1' at a specific orientation angle. Since the valve must be rotated by a predetermined angle, it is possible to prevent the valve from opening unnecessarily. Of course, the present invention can also be applied to valves other than water stop valves.

[Effect of idea]

As described in detail above, when using the valve of the present invention, by simply placing the operating rod on the blind plate from the outside and rotating it, the manual handle can be placed in the idling state with respect to the valve stem, and the valve can be placed in the closed state. Since they cannot be seen from the outside, they are suitable for use in water stop valves that cannot be controlled and cannot be opened or closed by private individuals without permission.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the valve of the present invention, Fig. 2 is a cut end view taken along line A to A in Fig. 1, Fig. 3 is a plan view of the shaft cylinder portion, and Fig. 4 is 5 is a plan view of the key shaft, FIG. 6 is a longitudinal sectional view, FIG. 7 is a plan view of the magnetic plate, and FIG. 8 is a partially cutaway front view of the operating rod. 1 is the handwheel, 1' is the blind plate, 2 is the valve stem,
2b is the square shaft part, 3 is the valve case, 4 is the valve body, 6
a is the neck, 8 is the shaft barrel, 8a is the upper surface of the step, 9 is the key shaft, 9c is the upper end surface of the key shaft, 12 is the magnetic plate, 13 is the operating rod, A is the protrusion, B and C are the middle and low stages. The notch part of the step, d is the notch part.

Claims (1)

[Scope of utility model registration request] In a valve configured to open and close a fluid passage with a valve body in a valve case by rotating a valve stem by rotating a hand handle, a short cylindrical neck that surrounds the valve stem to the upper part of the valve case. are connected in series, and between this neck and the internal valve stem square shaft,
The neck is made of a non-magnetic material that rotates freely and engages the valve stem in the circumferential direction, and a key shaft having a notch on the upper end surface is fitted into the neck.
The upper end surface of the key shaft is rotatably fitted to the outer periphery of the neck, and the middle and lower stages are formed in the circumferential direction by sandwiching protrusions on the upper surface of the stepped part of the non-magnetic shaft cylinder part that is integrated with the manual handle. Coincide with the upper surface of one of the intermediate notches in the customer notch, and extend over either the middle notch in the shaft cylinder portion and the upper end surface of the key shaft, or the lower notch and the notch in the key shaft. A non-magnetic rod that allows a magnetic plate to be placed on top of the stepped part of the shaft cylinder with a slight gap above the magnetic plate. A valve characterized by having a blind plate covered.