JPH11304012A - Gate valve - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sluice valve applicable to a buried pipe thinly covered with soil without any trouble by providing a female screw part on the side of a valve element, providing a valve rod to be screwed into the female screw part vertically within a valve rod housing part provided on the side of a body part, and connecting an operating means to the upper end of the valve rod protruded upward through the valve rod housing part. SOLUTION: A valve element housing part 6 capable of housing a valve element 5 is formed above a body part 4 having a valve seat 3 corresponding to a pipeline 2, and the pipeline 2 is opened and closed by vertically moving the valve element 5. A valve rod housing part 9 for housing a valve rod 8 screwed into a female screw part 7 provided on the valve element 5 is provided on the side of the body part 4 and valve element housing part 6. The valve rod 8 is held by rotatably holding the lower end part of a male screw member to be screwed into a female screw piece 7b by a lower bearing 10 provided on the bottom part of the valve rod housing part 9, and holding the upper part of the male screw member by an upper bearing 12 provided on the lid member 11 of the valve rod housing part 9. A cap 13 for engaging a valve key is provided on the upper end of the valve rod 8 protruded through the upper bearing 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gate valve, and more particularly, to a gate valve for opening and closing a pipe by moving a valve body.

[0002]

2. Description of the Related Art A gate valve, which is widely used as a valve for opening and closing various pipes, is provided with a valve body accommodating portion provided above a valve seat portion, and a valve body is provided. The pipe is opened and closed by moving up and down between the valve seat portion and the inside of the valve body accommodating portion. In the case of a general internal threaded gate valve, the valve element is moved by screwing a valve stem provided through the upper part of the valve element accommodating portion and a female thread part provided on the valve element upper part. This is done by rotating.

On the other hand, the conventional buried pipeline has an earth covering of one.
Because it is set to 200 mm, even in the gate valve,
It has been manufactured in a shape and size corresponding to 1200 mm of overburden. However, recently, in order to reduce the construction cost, it is planned to reduce the earth covering of the buried pipeline to about 600 to 800 mm.

[0004] However, as described above, in the gate valve, the valve body accommodating portion is continuously provided above the main body portion connected to the buried pipe, and further, the valve stem and the valve stem are provided above the valve body accommodating portion. Since the cap mounted on the tip of the valve stem protrudes, if the earth covering of the buried pipeline becomes thin, it becomes impossible to install a gate valve depending on the diameter.

Therefore, an object of the present invention is to provide a gate valve which can be applied to a buried pipe having a thin earth covering without any problem.

[0006]

In order to achieve the above object, a gate valve according to the present invention has, as a first configuration, a valve body accommodating portion provided continuously above a main body having a valve seat, and the valve body is provided with a valve body accommodating portion. By rotating a valve stem screwed into the provided female screw portion, the valve body is moved up and down between a valve seat portion and the inside of the valve body accommodating portion to open and close a pipeline. The female screw portion is protrudingly provided on the other side, and the valve stem screwed to the female screw portion is provided vertically in a valve stem storage portion provided on the side of the main body portion and the valve body housing portion, and the valve stem storage portion is provided. Opening and closing operation means is formed so as to be connectable to the upper end of the valve rod projecting upward through the top plate portion of the portion, and further, on the side of the valve body opposite to the female screw portion, the main body portion and A guide portion is provided, which is guided by a guide rail provided over the inner surface of the valve body accommodating portion.

In a second configuration of the gate valve of the present invention, a valve body accommodating portion is provided continuously above a main body portion having a valve seat, and a valve stem screwed into a female screw portion provided on the valve body is provided. By rotating, in a gate valve that opens and closes a pipe by moving the valve element up and down between a valve seat portion and a valve element accommodating portion, the female screw portions are provided on both sides of the valve element, respectively. The valve stem screwed into the female screw portion is provided vertically in a valve stem storage portion provided on both sides of the main body portion and the valve body accommodation portion, and penetrates through a top plate portion of the valve stem accommodation portion and extends upward. Opening / closing operation means is connectable to one of the upper ends of the valve stems protruding from the valve stem, and rotation transmitting means for interlocking rotation of both valve stems is provided at the upper end portions of both valve stems.

[0008]

1 and 2 show an embodiment of a gate valve according to the present invention. FIG. 1 is a sectional view of the gate valve as viewed from the direction of the pipeline axis, and FIG. 2 is a side view of the pipeline. FIG. 3 is a front view of the gate valve as viewed from above. In the gate valve 1, a valve body housing 6 having a size capable of housing a valve body 5 is provided continuously above a main body 4 having a valve seat 3 corresponding to a pipe line 2. The pipe line 2 is opened and closed by vertically moving the portion 3 and the valve element housing 6.

On one side of the main body 4 and the valve housing 6, a female thread 7 provided on the valve 5 and a valve rod 8 screwed to the female thread 7 are housed. A valve stem storage section 9 is provided. The female screw portion 7 holds a female screw piece 7b by an arm 7a protruding from one side of the valve body 5, and the valve rod 8 is a male screw member screwed to the female screw piece 7b. Is rotatably held by a lower bearing 10 provided at the bottom of the valve stem housing part 9, and the upper part of the male screw member is provided on a top plate part (lid member 11) of the valve stem housing part 9. It is rotatably held by the upper bearing 12. A cap 13 for engaging an opener serving as an opening / closing operation means is attached to an upper end of the valve rod 8 which penetrates the upper bearing 12 of the lid member 11 in a liquid-tight manner and projects above the valve box. .

On the opposite side of the female thread 7 in the valve body 5, a guide portion 15 guided by a guide rail 14 provided vertically on the inner surface of the main body portion 4 and the valve body accommodating portion 6 is required. Is provided according to.

In the gate valve 1 shown in this embodiment, the valve plug 5 is shown by an imaginary line in FIG. 1 by rotating the valve rod 8 by engaging the stopper 13 with the cap 13 as in the prior art. The valve moves up and down between a valve closing position and a valve opening position indicated by a solid line in FIG. At this time, the valve element 5 moves in the vertical direction while maintaining a predetermined posture by the female screw portion 7 screwed to the valve rod 8 and the guide portion 15 guided by the guide rail 14, so that a reliable valve is provided. Operation can be gained.

As described above, the female screw portion 7 screwed to the valve rod 8 is provided.
Is provided on the side of the valve body 5 without being provided above the valve body 5 as in the prior art, so that the height dimension of the entire valve can be made lower than in the past, so that the earth covering of the buried pipeline is reduced. Even if it becomes thin, it can be used without any problem.

3 to 5 show another embodiment of the gate valve of the present invention. FIG. 3 is a sectional view of the gate valve as viewed from the direction of the pipeline axis, and FIG. 4 is a view from the side of the pipeline. FIG. 5 is a plan view of the front view of the gate valve.

The gate valve 21 is provided in the same manner as in the above embodiment.
Above a main body 24 having a valve seat 23 corresponding to the conduit 22, a valve body housing 26 having a size capable of housing the valve body 25 is continuously provided, and the valve body 25 is connected to the valve seat 23 and the valve body. The pipe 22 is formed to open and close by being moved up and down with respect to the storage section 26.

The main body 24 and the valve housing 26
The female screw portions 27a and 27b and the valve stem 28
a, 28b for storing valve stem storage portions 29a, 29b. The female screw portions 27a, 27b are provided with arms 30a, 30 protruding from both sides of the valve body 25, respectively.
b holds the female screw pieces 31a and 31b, respectively. Further, the valve stems 28a and 28b are each
1a, 31b, the lower end of which is rotatably held by lower bearings 32a, 32b provided at the bottom of the valve stem housing portions 29a, 29b, and the upper portion thereof is a valve. Upper bearings 34a, 34b provided on the top plate (lid member 33) of the rod storage portions 29a, 29b
And the upper bearings 34a,
34b penetrates in a liquid-tight manner and protrudes above the valve box.

At the upper end of one of the valve rods 28a protruding above the valve box, a cap 35 for engaging an opener as an opening / closing operation means is mounted. Further, a rotation transmitting means including sprockets 36a, 36b and a chain 37 is provided at an upper end portion of the valve stem below a portion where the cap 35 is mounted, and when one of the valve stems 28a is rotated by an opener. The other valve stem 28b is formed so as to rotate in conjunction therewith.

Accordingly, in the gate valve 21 shown in this embodiment, when the stopper is engaged with the cap 35 attached to one of the valve rods 28a and the valve rod 28a is rotated, the sprockets 36a and 36b and the chain 37 are connected. Through both valve stems 28
a and 28b rotate in conjunction with each other, and the valve body 25 is moved through female screw portions 27a and 27b screwed to the respective valve rods 28a and 28b.
Moves up and down between the valve closing position shown by the imaginary line in FIG. 3 and the valve opening position shown by the solid line in FIG. 3 while maintaining the predetermined posture.

As described above, the female screw portion 2 is provided on both sides of the valve body 25.
By projecting the 7a, 27b and screwing it to the valve rods 28a, 28b on both sides, the height of the entire valve can be made lower than in the prior art, as in the above embodiment, and the embankment of the buried pipeline is covered. Not only can it be used without any problem even if it is thin, but a large-diameter valve body can also be moved up and down smoothly, and a reliable valve operation can be obtained.

The gate valve of the present invention is normally installed with the portion for connecting the opening / closing operation means facing upward, as shown in FIG. However, in actual installation, the opening / closing operation means connection portion can be installed in any direction in consideration of the state of the piping and operability.

[0020]

As described above, according to the gate valve of the present invention, since the overall height of the gate valve can be reduced, it can be used without any problem even if the burial of the buried pipeline becomes about 600 to 800 mm. can do.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a gate valve according to an embodiment of the present invention as viewed from a pipe axis direction.

FIG. 2 is a front view of the gate valve as viewed from the side of the pipeline.

FIG. 3 is a cross-sectional view of a gate valve according to another embodiment of the present invention as viewed from a pipe axis direction.

FIG. 4 is a front view of the gate valve as viewed from the side of the pipeline.

FIG. 5 is a plan view of the same.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Gate valve, 2 ... Pipe line, 3 ... Valve seat, 4 ... Body part, 5 ... Valve body, 6 ... Valve body storage part, 7 ... Female screw part, 7a ... Arm, 7
b ... female screw piece, 8 ... valve stem, 9 ... valve stem storage part, 10 ... lower bearing, 11 ... lid member, 12 ... upper bearing, 13 ... cap, 14 ... guide rail, 15 ... guide part, 21 ... partition Valve, 22: conduit, 23: valve seat, 24: body, 25: valve, 26: valve housing, 27a, 27b: female screw, 2
8a, 28b: valve stem, 29a, 29b: valve stem storage part, 3
0a, 30b: arm, 31a, 31b: female screw piece, 3
2a, 32b: Lower bearing, 33: Lid member, 34a, 34
b: Upper bearing, 35: Cap, 36a, 36b: Sprocket, 37: Chain

Claims (3)

[Claims] 1. A valve body accommodating portion is continuously provided above a main body portion having a valve seat, and a valve rod screwed into a female screw portion provided on the valve body is rotated to thereby connect the valve body to a valve seat portion. And a valve body that opens and closes a pipe by moving up and down into and out of the valve body housing portion, the female screw portion protrudingly provided on a side of the valve body, and the valve stem screwed to the female screw portion is provided. Opening / closing operation means can be connected to the upper end of the valve stem that is provided vertically in the valve stem housing part provided on the side of the main body and the valve body housing part and protrudes upward through the top plate part of the valve stem housing part. A gate valve characterized by being formed. 2. A guide rail is provided on an inner surface of a main body portion and a valve body housing portion facing the valve stem housing portion, and a guide portion guided by the guide rail is provided on a side opposite to a female screw portion of the valve body. The gate valve according to claim 1, wherein the gate valve is provided. 3. A valve body accommodating portion is continuously provided above a main body portion having a valve seat, and a valve rod screwed into a female screw portion provided on the valve body is rotated to thereby connect the valve body to a valve seat portion. And a valve body that opens and closes a pipe by moving up and down into and out of the valve body housing portion, wherein the female screw portions are respectively provided on both sides of the valve body so as to project therefrom, and the valve stem screwed to the female screw portion is provided. It is provided vertically in a valve stem housing part provided on both sides of the main body part and the valve body housing part, and opens and closes at one of the upper ends of the valve stem protruding upward through the top plate part of the valve stem housing part. A gate valve, wherein an operation means is formed so as to be connectable, and rotation transmitting means for interlocking rotation of both valve rods is provided at upper end portions of both valve rods.