JPH0454384Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a valve opening degree display that confirms the opening degree of a valve having an elevating type valve stem by the degree of protrusion of a rod directly connected to the valve stem. Regarding equipment.

[Conventional technology]

In an elevating type valve, such as a gate valve, the opening degree can be confirmed by displaying the opening degree on an opening display plate using a gear driven by the rotation of the valve stem, or by raising and lowering the valve stem. There is a method that uses the movement to check the valve opening degree by the degree of protrusion of a rod directly connected to the valve stem. In the former case, the degree of opening is accurately indicated by a pointer, but it is impossible to determine whether the valve is open or closed unless you approach the valve and check the pointer on the degree-of-opening display plate. On the other hand, the latter
Since it is used to check the degree of protrusion of the rod, it is possible to check whether the valve is open or closed from a distance without having to get close to the valve.If it is sufficient to simply check whether the valve is open or closed, the latter type of valve opening display device is used. is often used. In this latter valve opening display device, since it is necessary to connect the opening display rod directly to the valve stem and expose it to the outside, as shown in FIG. Cover the valve stem 4 with a valve stem cover 5 to prevent the valve stem from rusting due to rainwater, etc.
A valve opening degree indicating rod 6 covered with a valve stem 5 and connected to the shaft end of the valve shaft 5 by welding or screw means so that its axes coincide with each other is passed through the through hole 8 of the valve shaft cover body 5,
A bead-shaped rubber bush 20 that slides in close contact with the valve opening indicator rod 6 is fitted onto the periphery of the through hole 8 to prevent rainwater from entering the valve stem cover 5 from the through hole. I'm trying to prevent it.

[Problem that the invention attempts to solve]

However, the vertical movement of the valve stem does not result in an accurate linear movement because the valve stem is supported at one place by the drive sleeve. For this reason, the valve opening degree indicating rod directly connected to the valve shaft does not move accurately in a straight line, but instead moves up and down while eccentrically rotating around the drive sleeve portion as a fulcrum. In this way, when the valve opening display rod performs an irregular linear movement, the rubber bushing fitted to the valve stem cover body is compressed and deformed, which prevents it from coming into close contact with the valve opening display rod, creating a gap between the two. Not only was this formation, but the tightness of the fitting part between the rubber bush and the valve stem cover body was also impaired, allowing rainwater to enter the cover from both sides, making it impossible to expect complete prevention of rainwater entry. .

In view of the above-mentioned shortcomings of the conventional valve opening display device using the valve opening display rod, this invention was developed so that even if the valve opening display rod performs an distorted linear movement, the penetrating portion of the valve opening display rod can be removed. It is an object of the present invention to provide a valve opening degree display device with a simple configuration that prevents rainwater from entering.

[Means for solving problems]

In this invention, in order to solve the above-mentioned conventional problems, a valve opening degree display device is configured as follows.

That is, a valve stem cover body that is fixed to the valve body or a valve actuator attached to the valve body, encloses and covers the valve stem, and has a through hole in the center of the top plate, and a valve stem cover body that is fixed to the valve body or the valve actuator attached to the valve body, and that has a through hole in the center of the top plate; A valve opening degree indicating rod that is connected and integrated with their axes aligned and penetrated through the through hole, and a valve opening degree indicating rod that is externally fitted in a liquid-tight manner and engaged with the upper part of the valve stem cover body. In a valve opening display device for a valve stem-elevating type valve comprising a supported elastic waterproof member, a skirt member is integrally connected to the elastic waterproof member, and the tip side of the skirt member is aligned with the opening surface of the through hole. At the same time, the elastic waterproof member is attached to the tip of the skirt member so that the elastic waterproof member is integrated with the valve opening indicator rod and can freely move to an eccentric position. The gist of the present invention is a valve opening degree display device for a valve shaft elevating type valve, which is characterized by being provided with a locking means for locking the skirt member.

[Effect]

In the valve opening display device for the valve stem elevating type valve of this invention constructed in this way, the valve opening display rod integrally connected to the valve stem becomes elastically waterproof as the valve stem moves up and down as the valve opens and closes. The valve opening indicator rod slides in a fluid-tight state inside the member, but the radial deflection caused by the irregular vertical movement of the valve opening indicator rod causes it to move together with the valve opening indicator rod to an eccentric position. The movement of the movable elastic waterproof member does not cause the elastic waterproof member to be compressed and deformed, and no change occurs in the state of close contact between the valve opening degree indicating rod circumferential surface and the elastic waterproof member. Therefore, when the valve opening indicator rod moves up and down in an irregular manner, no gap is formed between the valve opening indicator rod and the elastic waterproof member, and rainwater is completely prevented from entering from this area. Ru. In addition, since the tip of the skirt member, which is integrally connected to the elastic waterproof member, extends below the through hole formed at the top of the valve shaft cover, the skirt is It has to rise from the lower surface of the tip of the section, and therefore rainwater is reliably prevented from entering from this section.

〔Example〕

Next, an embodiment of this invention will be described with reference to the drawings.

FIG. 1 is a partial cross-sectional view showing the positional relationship with respect to the valve actuator in a valve opening display device for a valve shaft elevating type valve according to an embodiment of the present invention, and FIG. 2 is a section A of FIG. 1. The enlarged sectional view and FIG. 3 are main part sectional views of another embodiment.

First, one embodiment shown in FIGS. 1 and 2 will be explained. The valve opening degree display device of the valve stem elevating type valve is attached to the valve actuator 2 installed in the valve body 1.
A valve shaft cover body 5 that covers a valve shaft 4 that moves up and down by the rotation of the drive sleeve 3 is fixed. A valve opening degree indicating rod 6 is integrally connected to the upper end of the valve stem 4 by welding or screw fixing so as to coincide with the axis of the valve stem 4, and passes through the top plate 7 of the valve stem cover body 5. The penetrating portion of this valve opening degree display rod 6 is made by connecting a neck pipe 9 to a through hole 8 made in the top plate 7 and protruding from the top plate 7, and inserting the valve opening degree display rod 6 into this neck pipe 9. It has a structure that allows it to penetrate. And this neck pipe 9
A locking flange 10 is integrally formed at the open end of the valve opening, and a rubber bush 11 that is slidably and liquid-tightly fitted onto the valve opening indicator rod 6 is locked to the locking flange 10. ing. This rubber button 11 and locking collar 1
0, the skirt portion 1 is attached to the rubber bush 11.
4 is integrally formed, and the locking portion 1 is attached to the skirt portion 14 so as to embrace the outer peripheral edge of the locking collar 10 at one end side.
This is done by forming a locking groove 12 inside the locking groove 12 and locking the outer peripheral edge of the locking collar 10 to this locking groove 12. A moving gap 13 formed by enlarging the radius of the groove 12 by several mm can freely move in the radial direction.

In the valve opening display device configured as described above, even if the valve opening display rod 6 makes an irregular linear movement due to the irregular vertical movement of the valve shaft 4, the valve opening display rod 6 is fitted onto the valve opening display rod 6 in a liquid-tight manner. The rubber bush 11 is the moving gear 1
For only 3 minutes, it can freely move in the radial direction with respect to the locking collar 10 that is integrated with the valve shaft cover body 5, and adapts to the distorted movement of the valve opening degree indicating rod 6. Therefore, since the rubber bush 11 is not compressed and deformed in the radial direction by the valve opening degree display rod 6, no gap is formed for rainwater to enter in the area where the two are in close contact with each other, and rainwater can be completely prevented from entering from this area. . In addition, the locking groove 12 and the locking portion 15 of the skirt portion 14 of the rubber bush 11 allow
A locking collar 1 provided to protrude above the top plate 7 of the cover body 5
Since the opening surface of the valve stem cover body 5 through which the valve opening degree display rod 6 passes, that is, the upper opening surface of the neck pipe 9, is
It is located above the lower end surface around the skirt portion 14 of No. 1. Therefore, rainwater can be completely prevented from entering between the rubber bush 11 and the top surface of the top plate 7 of the valve shaft cover body 5.

Next, another embodiment shown in FIG. 3 will be described. In the valve opening display device of this embodiment, a rubber bush 11' having an inverted dish-shaped rainwater shield skirt 14' fixedly attached to a valve opening display rod 6 penetrating through a valve stem cover body 5 is liquid-tightly removed. At the same time, the valve stem cover body 5 is attached so that the lower edge of the outer periphery of the rainwater shielding skirt 14' is positioned below the opening surface of the through hole 8 of the valve stem cover body 5. The mounting means is such that the rubber bush 11' does not move in the axial direction of the valve opening indicator rod 6, but allows some movement in the radial direction, for example, it is fixed by welding to four locations on the outer peripheral surface of the valve shaft cover body 5. This is done by connecting a receiving hole 17 formed in the locking metal fitting 16 and a hanging hole 19 of a receiving piece 18 protruding from the lower edge of the outer periphery of the rainwater shielding skirt 14' with a hook material 21 at both ends.

The valve opening degree display device configured in this manner includes a locking fitting 16 protruding from the valve stem cover body 5 and a rainwater shield skirt 1 integrated with the rubber bush 11'.
By the hook material 21 that connects the receiving piece 18 of 4',
Since the axial movement of the rubber bush 11' is stopped and it adapts to the radial movement of the valve opening display rod 6, the rubber bush 11 is ′ is no longer compressed and deformed. Therefore, the part of the rubber bushing 11' that is fitted onto the valve opening indicator rod 6 is always maintained in close contact with the valve opening indicator rod 6, and rainwater is completely prevented from entering from this part. Furthermore, since the lower edge of the outer periphery of the rainwater shielding skirt 14' is located below the through hole 8 of the valve stem cover body 5, rainwater is also prevented from entering from this portion.

It should be noted that the invention is not limited to the two embodiments described above, and the rubber bush adapts to changes in the radial direction when the valve opening display rod moves up and down without being compressed, and the valve opening display rod It goes without saying that this includes configurations in which the opening surface of the through-hole passing through is not closed in the same plane by a rubber bushing or a member integrated therewith, but in a covered state. do not have.

〔effect〕

As explained above, according to the valve opening degree display device for a valve stem elevating type valve according to the present invention, the lowermost edge of the outer periphery of the skirt member consisting of the rubber bushing or the rainwater shielding skirt formed integrally with the rubber bushing, The valve opening indicator rod is positioned below the opening surface of the through hole through which the valve opening indicator rod passes, and the waterproof member externally attached to the valve opening indicator rod is allowed to move horizontally within a range where it is not compressed in the radial direction. Since it is engaged and supported by the valve stem cover body, the waterproof member is not compressed even when the valve opening display rod is moved up and down in an irregular manner, and therefore, the liquid tightness between the valve opening display rod and the waterproof member is maintained. will be done. In addition, since the rainwater passage gap from the lower edge of the outer periphery of the waterproof member to the through hole is bent upward, rainwater is also prevented from entering from this portion.
Therefore, the conventional problems of rainwater entering between the through hole in the valve stem cover and the waterproof member, and between the waterproof member and the valve opening indicator rod are completely resolved, and the rust on the valve stem is eliminated. This prevents the valve from opening and closing smoothly.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional view showing a state in which a valve opening degree display device for a valve shaft elevating type valve, which is an embodiment of this invention, is attached to a valve actuator, and Fig. 2 is a section A in Fig. 1. FIG. 3 is a sectional view of a main part showing another embodiment of this invention, and FIG. 4 is a sectional view of a main part of a conventional valve opening degree display device. 1... Valve body, 2... Valve actuator, 3... Drive sleeve, 4... Valve stem, 5...
... Valve shaft cover body, 6 ... Valve opening degree display rod, 8 ... Through hole, 9 ... Neck pipe, 10 ... Locking collar, 11, 1
1'...Rubber bushing, 12...Latching groove, 13...
...Movement gap, 14...Skirt part, 14'
...Rainwater shield skirt, 15...Locking part, 16...
... Locking metal fitting, 18 ... Receiving piece, 21 ... Hook material.

Claims (1)

[Scope of utility model registration request] A valve stem cover body that is fixed to the valve body or a valve actuator attached to the valve body, encloses and covers the valve stem, and has a through hole in the center of the top plate; A valve opening indicating rod that is connected and integrated with their axes aligned and penetrated through the through hole, and a valve opening indicating rod that is externally fitted in a liquid-tight manner and is engaged and supported on the upper part of the valve shaft cover body. In the valve opening degree display device for a valve stem-elevating type valve, which comprises an elastic waterproof member, a skirt member is integrally connected to the elastic waterproof member, and the tip side of the skirt member is positioned below the opening surface of the through hole. The valve stem cover body and the skirt member are installed at the tip of the skirt member so that the elastic waterproof member is integrated with the valve opening indicator rod and can move freely to an eccentric position. 1. A valve opening degree display device for a valve shaft elevating type valve, characterized in that a locking means for locking the valve shaft is provided.