JP2583548Y2 - Guide structure of valve body in gate valve - 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 body guide structure for a gate valve, and more particularly to a valve body guide structure suitable for a soft seal gate valve.

[0002]

2. Description of the Related Art FIGS. 4 and 5 show an example of an internally threaded soft seal gate valve. This soft-seal gate valve 1 comprises a valve body 4 in which a valve body accommodating portion 3 is connected to a straight tubular main body 2 in a direction perpendicular to the valve body, and a valve body for closing a valve seat provided in the main body 2. The valve 5 is moved by rotating the valve shaft 6 to open and close the valve.

A guide for opening and closing the valve element 5 is provided with a groove 7 formed on both sides of the valve element 5 and a valve box from the main body 2 to the valve element accommodating section 3 corresponding to the groove 7. This is achieved by the ridges 8 projecting from the side walls.

[0004]

When a gate valve having the above-described valve body guide structure is used for sewage, for example,
Sand or the like contained in the sewage may be caught between the groove 7 and the ridge 8 of the valve body guide, and these guides may be damaged by wear. In particular, when the gate valve was installed sideways, sand and the like tended to accumulate in the lower ridge portion 8 and were easily damaged.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a valve body guide structure which can prevent the valve body guide portion of the gate valve from being worn and can smoothly open and close the valve body.

[0006]

In order to achieve the above-mentioned object, a guide structure of a valve element in a gate valve according to the present invention has guide holes formed at both ends of the valve element in a moving direction of the valve element. The valve shaft is provided with a guide shaft that slides in the guide hole.

[0007]

[Operation] According to the above configuration, since the guide shaft can be set apart from the valve box side wall, sand and the like do not accumulate in the guide portion of the valve body, and the valve body slides between the guide groove and the guide shaft. Wear when moving can be prevented.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway perspective view of a soft seal gate valve to which the present invention is applied, FIG. 2 is a longitudinal sectional view of the same, and FIG.
FIG. 3 is a sectional view taken along line III-III of FIG.

[0009] The soft seal gate valve 11 shown in this embodiment.
Is a valve box 1 comprising a straight tubular main body 12 and a valve body accommodating part 13 connected to the side of the main body 12 in substantially the same manner as in the prior art.
4, a valve body 15 that moves in the valve box 14 to open and close a valve seat provided in the main body 12, a valve shaft 16 with a screw for opening and closing the valve body 15, and a valve body 15 And a guide section 17 for guiding the pipes, and are connected to pipes by flanges 18 provided at both ends of the main body section 12.

The guide portion 17 has guide holes 19 formed at both ends of the valve body 15 so as to penetrate in the valve body moving direction.
And a guide shaft 20 that slides into the guide hole 19, and the valve body 15 is guided by the sliding of the guide hole 19 and the guide shaft 20 to open and close.

The above-mentioned guide shaft 20 has both ends at the valve box 14.
Further, the elastic member 22 is fitted to support holes 21 and 21 provided at predetermined positions of the valve box cover 14a, so that slight displacement of the guide shaft 20 can be absorbed.

By configuring the guide portion 17 of the valve body 15 in this manner, a space S (see FIG. 2) through which fluid flows can be formed between the guide shaft 20 and the valve box inner wall 14b. Sand and the like do not accumulate in the portion 17, and the sand and the like hardly bite between the guide hole 19 and the guide shaft 20 when the valve body 15 is opened and closed.

Therefore, the guide hole 19 of the guide portion 17
And the guide shaft 20 is not damaged by wear,
The opening and closing operation of the valve body 15 can be performed reliably and smoothly. Further, even if the soft seal gate valve 11 is installed horizontally, since sand and the like do not accumulate on the guide shaft 20 portion,
This is suitable when the soft seal gate valve 11 is installed horizontally in a sewer pipe or the like.

The structure of the gate valve is not limited to the above embodiment, but can be applied to gate valves having various structures.

[0015]

As described above, according to the present invention, the valve element is guided by the guide holes provided at both ends of the valve element and the guide shaft provided in the valve box. The guide portion is not damaged by sand etc.
The opening and closing operation of the valve element can be performed reliably and smoothly.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a soft seal gate valve showing an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of the same.

FIG. 3 is a sectional view taken along line III-III of FIG. 2;

FIG. 4 is a longitudinal sectional view showing an example of a conventional soft seal gate valve.

FIG. 5 is a sectional view taken along line VV of FIG. 4;

[Explanation of symbols]

11: Soft seal gate valve, 12: Main body, 13: Valve housing, 14: Valve box, 15: Valve, 16: Valve shaft, 17 ...
Guide part, 19: guide hole, 20: guide shaft, 21: support hole

Claims (1)

(57) [Scope of request for utility model registration] 1. A valve in a gate valve, wherein a guide hole penetrating in a valve body moving direction is formed at both ends of a valve body, and a guide shaft which slides in the guide hole is provided in a valve box. Guide structure of the body.