JP3294179B2 - Valve device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a valve device having a lubricating oil supply hole for supplying lubricating oil to a sliding valve shaft.

[0002]

2. Description of the Related Art FIG. 4 is a front view showing the position of a grease injection hole of a conventional valve device, FIG. 5 is a side view of FIG. 4, and FIG. 6 is a partial sectional view showing the vicinity of the grease injection hole of the conventional valve device. is there. FIG.
In FIG. 6 to FIG. 6, reference numeral 21 denotes a valve main body having a built-in valve plug 21a for opening and closing a flow passage, and 22 denotes an upper lid formed substantially in a substantially cylindrical shape and having a flange portion 22a. Stat bolt 2 on top
3 and a nut 24. Reference numeral 22b denotes a step portion on which a yoke 34 described later is placed, and 22c denotes a screw portion.

Reference numeral 25 denotes a valve plug 21a in the valve body 21.
Is a valve shaft insertion hole provided in the upper lid 22 for inserting the valve shaft 25, and 26a is a ground for defining a lower limit position for installing a packing 28 described later.
A lantern ring 27 is disposed in the valve shaft insertion hole 26 and serves as a lubricating oil supply member for storing grease, and is disposed to face a grease injection hole 36 described later. 2
Reference numeral 8 denotes a plurality of packings disposed above and below the lantern ring 27, and reference numeral 28a denotes a packing ring.

[0004] The number of packings 28 to be provided is determined by the sealing conditions to be ensured irrespective of the location of the lantern ring 27. That is, when the disposition position of the lantern ring 27 is low, from the viewpoint of ensuring the sealing performance at the upper and lower ends of the lantern ring 27,
It is necessary to arrange a predetermined number of packings 28 at both ends, and in order to secure the arrangement space, the arrangement position of the gland 26a is necessarily lowered.

Reference numeral 29 denotes a packing 2 via a spacer 29a.
8 is a packing follower that presses and regulates the position thereof, and is fixed by a packing flange 30, a stat bolt 31a and a nut 31b. 32 is the valve shaft 2
This is a valve operating device that controls the valve plug 21a by driving the drive shaft 33 connected to the drive shaft 5.

Reference numeral 34 denotes a yoke fixed to the upper portion of the upper lid 22 to support the valve operating device 32.
annular fixing part 3 formed in an annular shape for mounting and fixing on
4a. The annular fixing portion 34a is
It is fastened and fixed by a yoke fastening nut 35 screwed into 2c.

Reference numeral 36 denotes a grease injection hole which penetrates a side surface of the upper lid 22 from a portion located below the annular fixing portion 34a to the valve shaft insertion hole 26. A female screw for screwing and fixing a lubricator (not shown) is provided on the inner peripheral surface of the grease injection hole 36.

Next, the operation will be described. When grease is injected from a lubricator (not shown) into the grease injection hole 36, a predetermined amount of grease is stored in the lantern ring 27. When the drive shaft 33 is moved up and down by the valve operating device 32, the valve shaft 25 connected thereto slides in the valve shaft insertion hole 26 and controls opening and closing of the valve plug 21a in the valve body 21. At this time, the sliding resistance generated in the valve shaft 25 is reduced by the grease stored in the lantern ring 27. Fluid leakage at the valve shaft insertion hole 26 is
8 prevents it.

[0009]

Since the conventional valve device is constructed as described above, the lantern ring 27 is disposed corresponding to the position of the grease injection hole 36, and the space for disposing the packing 28 is provided. To secure the ground 2
6a had to be formed at a deep position of the upper lid 22, and there was a problem that the thickness (height) of the upper lid 22 had to be increased accordingly. That is, there has been a problem that the entire valve device becomes large and the weight increases.

If the ground 26a is formed deeper, a spacer 29a must be provided in order to save the packing 28. This increases the number of parts and weight, and also impairs assembly workability. There were challenges.

Further, an annular fixing portion 34a of the yoke 34
Is only fastened to the upper lid 22 by the yoke tightening nut 35 so as not to shift in the vertical direction.
When the looseness occurs in 5, the vertical displacement can be regulated to some extent, but the displacement in the circumferential direction cannot be regulated, and there has been a problem that the valve operating device 32 is displaced in the circumferential direction of the upper lid 22.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and can reduce the size and weight of the upper lid, reduce the number of parts, improve the assembling workability, and provide a stopper for the yoke. The aim is to obtain a feasible valve device.

[0013]

According to a first aspect of the present invention, there is provided a valve device comprising: an upper lid having a valve shaft insertion hole; a yoke erected on the upper lid to support a valve operating device; A lubricating oil supply member disposed in the shaft insertion hole and supplying lubricating oil to a sliding portion of the valve shaft; and a disposing position of the lubricating oil supply member disposed in the valve shaft insertion hole to prevent leakage of fluid. And a lubricating oil injection hole provided in communication with the valve shaft insertion hole to supply the lubricating oil to the lubricating oil supply member. It is provided through the upper lid.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 FIG. 1 is a partial cross-sectional view showing the vicinity of a grease injection hole of a valve device according to Embodiment 1 of the present invention, FIG. 2 is a front view showing the position of a grease injection hole of the valve device, and FIG. 3 is a side view of FIG. .

In FIGS. 1 to 3, reference numeral 1 denotes a valve body having a valve plug (not shown) for opening and closing a flow path, and 2 denotes an upper lid formed substantially in a substantially cylindrical shape and having a flange portion 2a. 2 a is fixed to the upper part of the valve body 1 by the stat bolt 3 and the nut 4. 2
b is a step portion on which a yoke 14 described later is placed, and 2c is a screw portion.

Reference numeral 5 denotes a valve shaft connected to a valve plug (not shown) in the valve body 1. Reference numeral 6 denotes an upper cover 2 for inserting the valve shaft 5.
, A ground for determining a lower limit position for installing a packing 8 described later, and 7 a valve shaft insertion hole 6.
A lantern ring (lubricating oil supply member) which is disposed inside and stores grease (lubricating oil), and 8 is a plurality of packings (seal members) disposed above and below the lantern ring 7. In addition,
The number of the packings 8 is determined depending on sealing conditions to be secured.

A packing follower 9 presses the packing 8 to regulate its position, and is fixed by a packing flange 10 and a nut 11. 12 is the valve shaft 5
Is a valve operating device that controls a valve plug (not shown) by driving a drive shaft 13 connected to the valve operating device.

Reference numeral 14 denotes a yoke which is fixed to the upper part of the upper lid 2 and supports the valve operating device 12. The yoke 14 has an annular fixing portion (yoke) 14a formed in an annular shape for mounting and fixing on the step portion 2b of the upper lid 2. ing. The annular fixing portion 14a is fastened and fixed by a yoke fastening nut 15 screwed into the screw portion 2c.

Reference numeral 16 denotes a grease injection hole (lubricating oil injection hole) comprising a through hole 16a penetrating through the annular fixing portion 14a of the yoke 14, and a through hole 16b penetrating the upper lid 2 from the side surface to the valve shaft insertion hole 6. It is. A female screw for screwing and fixing the tip of the lubricator 17 for injecting grease is provided on the inner surface of the grease injection hole 16.

As described above, according to the present invention, the grease injection hole 16 is provided at a position penetrating the annular fixing portion 14a of the yoke 14,
By providing the lantern ring 7 at a position higher than the conventional one, the lower limit position for disposing the packing 8 is set to be higher than the conventional one. This means that if the lower limit position for disposing the packing 8 can be made higher than before,
This is because the ground 6a can be provided at a shallow position, so that the thickness of the upper cover 2 can be reduced, and the spacer 29a conventionally provided to save packing is not required.

Next, the operation will be described. When grease is injected from the lubricator 17, the grease reaches the lantern ring 7 through the through hole 16b. Then, a predetermined amount of grease is stored in the lantern ring 7.

When the drive shaft 13 is moved up and down by the valve operating device 12, the valve shaft 5 connected thereto slides in the valve shaft insertion hole 6 to open and close a valve plug (not shown) in the valve body 1. Control. At this time, the sliding resistance generated on the valve shaft 5 is reduced by the grease stored in the lantern ring 7. Fluid leakage at the valve shaft insertion hole 6 is
Is prevented by

As described above, according to the first embodiment, the grease injection hole 16 is fixed to the annular fixing portion 14a of the yoke 14.
The ground 6a can be provided at a shallow position. Therefore, the thickness of the upper lid 2 can be reduced, which contributes to the reduction in size and weight of the valve device. In addition, since it is not necessary to provide the spacer 29a conventionally provided to save packing, it is possible to contribute to weight reduction by reducing the number of parts. Thus, an effect that the workability in assembling can be improved can be obtained.

Further, the lubricator 17 is provided with the grease injection hole 1.
6, the annular fixing portion 14a is fixed to the upper cover 2 by so-called pinning, so that the annular fixing portion 14a can be effectively prevented from shifting in the circumferential direction of the upper cover 2, and the valve operating device 12 The effect of realizing the detent around is obtained.

[0025]

As described above, according to the first aspect of the present invention, the upper cover having the valve shaft insertion hole, the yoke erected above the upper cover and supporting the valve operating device, and the valve shaft are provided. A lantern ring disposed in the insertion hole and supplying lubricating oil to a sliding portion of the valve shaft; and a seal member disposed in the valve shaft insertion hole for preventing fluid leakage and restricting a position where the lantern ring is disposed. And a lubricating oil injection hole provided in communication with the valve shaft insertion hole to supply the lubricating oil to the lantern ring, wherein the lubricating oil injection hole penetrates the yoke and the upper lid. With the provision and configuration, the thickness of the upper lid can be reduced, which contributes to the reduction in size and weight of the valve device.In addition, since there is no need to provide a spacer which is conventionally provided to save the sealing member, the number of parts is reduced, thereby reducing the weight. Can contribute to , The effect of even further enhanced assembling workability.

Further, by screwing and fixing a part of the lubricating oil injector to the lubricating oil injection hole, the yoke is fixed to the upper lid by so-called pinning, and the yoke is shifted in the circumferential direction of the upper lid. This can be effectively prevented, and there is an effect that the rotation of the valve operating device can be stopped.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view showing the vicinity of a grease injection hole of a valve device according to Embodiment 1 of the present invention.

FIG. 2 is a front view showing a position of a grease injection hole of the valve device.

FIG. 3 is a side view of FIG. 2;

FIG. 4 is a front view showing a position of a grease injection hole of a conventional valve device.

FIG. 5 is a side view of FIG. 4;

FIG. 6 is a partial sectional view showing the vicinity of a grease injection hole of a conventional valve device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Valve main body 2 Top cover 5 Valve shaft 6 Valve shaft insertion hole 7 Lantern ring (lubricating oil supply member) 8 Packing (seal member) 12 Valve actuator 14 Yoke 14a Annular fixing part (yoke) 16 Grease injection hole (lubricant oil injection hole) )

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F16K 1/32 F16K 41/00

Claims (1)

(57) [Claims] An upper cover having a valve shaft insertion hole which is mounted on an upper portion of a valve body and slidably holds a valve shaft, and supports a valve operating device which is erected on the upper cover and drives the valve shaft. A yoke, a lubricating oil supply member disposed in the valve shaft insertion hole for supplying lubricating oil to a sliding portion of the valve shaft, and a lubrication oil member disposed in the valve shaft insertion hole for preventing fluid leakage and lubricating. A valve device comprising a seal member for regulating an arrangement position of an oil supply member, and a lubricating oil injection hole provided in communication with the valve shaft insertion hole for supplying the lubricating oil to the lubricating oil supply member. And a lubricating oil injection hole provided through the yoke and the upper lid.